diff --git a/README.md b/README.md
index dccf094..5947917 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,14 @@ Create a digital passport for your physical items.
 
 ![100 Percent Coverage](./images/100coverage.png)
 
+## Static Analysis!
+
+[Slither Report](./contract/Slither-Report.md)
+
+## Fuzzing!
+
+![Echidna Fuzzing Results](./images/echidna.png)
+
 ## Description
 
 A dApp that allows users to create a digital passport for physical items and make the information associated with these items easily accessible.
diff --git a/contract/crytic-export/combined_solc.json b/contract/crytic-export/combined_solc.json
new file mode 100644
index 0000000..053dfee
--- /dev/null
+++ b/contract/crytic-export/combined_solc.json
@@ -0,0 +1 @@
+{"sources": {"/Users/fabian/Code/ItemBlocks/contract/echidna/PropertyTest.sol": {"AST": {"absolutePath": "echidna/PropertyTest.sol", "exportedSymbols": {"Context": [1699], "ERC165": [2278], "ERC721": [1669], "IERC165": [2290], "IERC721": [1953], "IERC721Errors": [1789], "IERC721Metadata": [1999], "IERC721Receiver": [1971], "ItemBlocks": [512], "ItemBlocksPropertyTest": [143], "Ownable": [660], "Strings": [2254]}, "id": 144, "license": "MIT", "nodeType": "SourceUnit", "nodes": [{"id": 1, "literals": ["solidity", "^", "0.8", ".18"], "nodeType": "PragmaDirective", "src": "32:24:0"}, {"absolutePath": "src/ItemBlocks.sol", "file": "../src/ItemBlocks.sol", "id": 2, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 144, "sourceUnit": 513, "src": "58:31:0", "symbolAliases": [], "unitAlias": ""}, {"abstract": false, "baseContracts": [{"baseName": {"id": 4, "name": "ItemBlocks", "nameLocations": ["335:10:0"], "nodeType": "IdentifierPath", "referencedDeclaration": 512, "src": "335:10:0"}, "id": 5, "nodeType": "InheritanceSpecifier", "src": "335:10:0"}], "canonicalName": "ItemBlocksPropertyTest", "contractDependencies": [], "contractKind": "contract", "documentation": {"id": 3, "nodeType": "StructuredDocumentation", "src": "91:208:0", "text": " @title \n @author \n @notice \n \n @dev There are some specific addresses in Echidna:\n0x30000 calls the constructor.\n0x10000, 0x20000, and 0x30000 randomly call other functions."}, "fullyImplemented": true, "id": 143, "linearizedBaseContracts": [143, 512, 660, 1669, 1789, 1999, 1953, 2278, 2290, 1699], "name": "ItemBlocksPropertyTest", "nameLocation": "309:22:0", "nodeType": "ContractDefinition", "nodes": [{"constant": false, "id": 8, "mutability": "mutable", "name": "testTokenId", "nameLocation": "360:11:0", "nodeType": "VariableDeclaration", "scope": 143, "src": "352:23:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 6, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "352:7:0", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "value": {"hexValue": "30", "id": 7, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "374:1:0", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}, "visibility": "internal"}, {"body": {"id": 28, "nodeType": "Block", "src": "425:127:0", "statements": [{"expression": {"id": 26, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": {"id": 17, "name": "testTokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8, "src": "435:11:0", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "Assignment", "operator": "=", "rightHandSide": {"arguments": [{"hexValue": "37", "id": 19, 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"lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "1901:40:1", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 593, "nodeType": "RevertStatement", "src": "1894:47:1"}]}}]}, "documentation": {"id": 581, "nodeType": "StructuredDocumentation", "src": "1729:62:1", "text": " @dev Throws if the sender is not the owner."}, "id": 597, "implemented": true, "kind": "function", "modifiers": [], "name": "_checkOwner", "nameLocation": "1805:11:1", "nodeType": "FunctionDefinition", "parameters": {"id": 582, "nodeType": "ParameterList", "parameters": [], "src": "1816:2:1"}, "returnParameters": {"id": 583, "nodeType": "ParameterList", "parameters": [], "src": "1841:0:1"}, "scope": 660, "src": "1796:162:1", "stateMutability": "view", "virtual": true, "visibility": "internal"}, {"body": {"id": 610, "nodeType": "Block", "src": "2347:47:1", "statements": [{"expression": {"arguments": [{"arguments": 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"src": "112:24:2"}, {"abstract": false, "baseContracts": [], "canonicalName": "IERC20Errors", "contractDependencies": [], "contractKind": "interface", "documentation": {"id": 1702, "nodeType": "StructuredDocumentation", "src": "138:139:2", "text": " @dev Standard ERC20 Errors\n Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens."}, "fullyImplemented": true, "id": 1741, "linearizedBaseContracts": [1741], "name": "IERC20Errors", "nameLocation": "288:12:2", "nodeType": "ContractDefinition", "nodes": [{"documentation": {"id": 1703, "nodeType": "StructuredDocumentation", "src": "307:309:2", "text": " @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.\n @param sender Address whose tokens are being transferred.\n @param balance Current balance for the interacting account.\n @param needed Minimum amount required to perform a transfer."}, "errorSelector": "e450d38c", "id": 1711, "name": "ERC20InsufficientBalance", "nameLocation": "627:24:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1710, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1705, "mutability": "mutable", "name": "sender", "nameLocation": "660:6:2", "nodeType": "VariableDeclaration", "scope": 1711, "src": "652:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1704, "name": "address", "nodeType": "ElementaryTypeName", "src": "652:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1707, "mutability": "mutable", "name": "balance", "nameLocation": "676:7:2", "nodeType": "VariableDeclaration", "scope": 1711, "src": "668:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1706, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "668:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1709, "mutability": "mutable", "name": "needed", "nameLocation": "693:6:2", "nodeType": "VariableDeclaration", "scope": 1711, "src": "685:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1708, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "685:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "651:49:2"}, "src": "621:80:2"}, {"documentation": {"id": 1712, "nodeType": "StructuredDocumentation", "src": "707:152:2", "text": " @dev Indicates a failure with the token `sender`. Used in transfers.\n @param sender Address whose tokens are being transferred."}, "errorSelector": "96c6fd1e", "id": 1716, "name": "ERC20InvalidSender", "nameLocation": "870:18:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1715, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1714, "mutability": "mutable", "name": "sender", "nameLocation": "897:6:2", "nodeType": "VariableDeclaration", "scope": 1716, "src": "889:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1713, "name": "address", "nodeType": "ElementaryTypeName", "src": "889:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "888:16:2"}, "src": "864:41:2"}, {"documentation": {"id": 1717, "nodeType": "StructuredDocumentation", "src": "911:159:2", "text": " @dev Indicates a failure with the token `receiver`. Used in transfers.\n @param receiver Address to which tokens are being transferred."}, "errorSelector": "ec442f05", "id": 1721, "name": "ERC20InvalidReceiver", "nameLocation": "1081:20:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1720, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1719, "mutability": "mutable", "name": "receiver", "nameLocation": "1110:8:2", "nodeType": "VariableDeclaration", "scope": 1721, "src": "1102:16:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1718, "name": "address", "nodeType": "ElementaryTypeName", "src": "1102:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "1101:18:2"}, "src": "1075:45:2"}, {"documentation": {"id": 1722, "nodeType": "StructuredDocumentation", "src": "1126:345:2", "text": " @dev Indicates a failure with the `spender`\u2019s `allowance`. Used in transfers.\n @param spender Address that may be allowed to operate on tokens without being their owner.\n @param allowance Amount of tokens a `spender` is allowed to operate with.\n @param needed Minimum amount required to perform a transfer."}, "errorSelector": "fb8f41b2", "id": 1730, "name": "ERC20InsufficientAllowance", "nameLocation": "1482:26:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1729, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1724, "mutability": "mutable", "name": "spender", "nameLocation": "1517:7:2", "nodeType": "VariableDeclaration", "scope": 1730, "src": "1509:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1723, "name": "address", "nodeType": "ElementaryTypeName", "src": "1509:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1726, "mutability": "mutable", "name": "allowance", "nameLocation": "1534:9:2", "nodeType": "VariableDeclaration", "scope": 1730, "src": "1526:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1725, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1526:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1728, "mutability": "mutable", "name": "needed", "nameLocation": "1553:6:2", "nodeType": "VariableDeclaration", "scope": 1730, "src": "1545:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1727, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1545:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "1508:52:2"}, "src": "1476:85:2"}, {"documentation": {"id": 1731, "nodeType": "StructuredDocumentation", "src": "1567:174:2", "text": " @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.\n @param approver Address initiating an approval operation."}, "errorSelector": "e602df05", "id": 1735, "name": "ERC20InvalidApprover", "nameLocation": "1752:20:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1734, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1733, "mutability": "mutable", "name": "approver", "nameLocation": "1781:8:2", "nodeType": "VariableDeclaration", "scope": 1735, "src": "1773:16:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1732, "name": "address", "nodeType": "ElementaryTypeName", "src": "1773:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "1772:18:2"}, "src": "1746:45:2"}, {"documentation": {"id": 1736, "nodeType": "StructuredDocumentation", "src": "1797:195:2", "text": " @dev Indicates a failure with the `spender` to be approved. Used in approvals.\n @param spender Address that may be allowed to operate on tokens without being their owner."}, "errorSelector": "94280d62", "id": 1740, "name": "ERC20InvalidSpender", "nameLocation": "2003:19:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1739, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1738, "mutability": "mutable", "name": "spender", "nameLocation": "2031:7:2", "nodeType": "VariableDeclaration", "scope": 1740, "src": "2023:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1737, "name": "address", "nodeType": "ElementaryTypeName", "src": "2023:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "2022:17:2"}, "src": "1997:43:2"}], "scope": 1837, "src": "278:1764:2", "usedErrors": [1711, 1716, 1721, 1730, 1735, 1740], "usedEvents": []}, {"abstract": false, "baseContracts": [], "canonicalName": "IERC721Errors", "contractDependencies": [], "contractKind": "interface", "documentation": {"id": 1742, "nodeType": "StructuredDocumentation", "src": "2044:141:2", "text": " @dev Standard ERC721 Errors\n Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens."}, "fullyImplemented": true, "id": 1789, "linearizedBaseContracts": [1789], "name": "IERC721Errors", "nameLocation": "2196:13:2", "nodeType": "ContractDefinition", "nodes": [{"documentation": {"id": 1743, "nodeType": "StructuredDocumentation", "src": "2216:219:2", "text": " @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20.\n Used in balance queries.\n @param owner Address of the current owner of a token."}, "errorSelector": "89c62b64", "id": 1747, "name": "ERC721InvalidOwner", "nameLocation": "2446:18:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1746, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1745, "mutability": "mutable", "name": "owner", "nameLocation": "2473:5:2", "nodeType": "VariableDeclaration", "scope": 1747, "src": "2465:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1744, "name": "address", "nodeType": "ElementaryTypeName", "src": "2465:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "2464:15:2"}, "src": "2440:40:2"}, {"documentation": {"id": 1748, "nodeType": "StructuredDocumentation", "src": "2486:132:2", "text": " @dev Indicates a `tokenId` whose `owner` is the zero address.\n @param tokenId Identifier number of a token."}, "errorSelector": "7e273289", "id": 1752, "name": "ERC721NonexistentToken", "nameLocation": "2629:22:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1751, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1750, "mutability": "mutable", "name": "tokenId", "nameLocation": "2660:7:2", "nodeType": "VariableDeclaration", "scope": 1752, "src": "2652:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1749, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2652:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "2651:17:2"}, "src": "2623:46:2"}, {"documentation": {"id": 1753, "nodeType": "StructuredDocumentation", "src": "2675:289:2", "text": " @dev Indicates an error related to the ownership over a particular token. Used in transfers.\n @param sender Address whose tokens are being transferred.\n @param tokenId Identifier number of a token.\n @param owner Address of the current owner of a token."}, "errorSelector": "64283d7b", "id": 1761, "name": "ERC721IncorrectOwner", "nameLocation": "2975:20:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1760, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1755, "mutability": "mutable", "name": "sender", "nameLocation": "3004:6:2", "nodeType": "VariableDeclaration", "scope": 1761, "src": "2996:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1754, "name": "address", "nodeType": "ElementaryTypeName", "src": "2996:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1757, "mutability": "mutable", "name": "tokenId", "nameLocation": "3020:7:2", "nodeType": "VariableDeclaration", "scope": 1761, "src": "3012:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1756, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3012:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1759, "mutability": "mutable", "name": "owner", "nameLocation": "3037:5:2", "nodeType": "VariableDeclaration", "scope": 1761, "src": "3029:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1758, "name": "address", "nodeType": "ElementaryTypeName", "src": "3029:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "2995:48:2"}, "src": "2969:75:2"}, {"documentation": {"id": 1762, "nodeType": "StructuredDocumentation", "src": "3050:152:2", "text": " @dev Indicates a failure with the token `sender`. Used in transfers.\n @param sender Address whose tokens are being transferred."}, "errorSelector": "73c6ac6e", "id": 1766, "name": "ERC721InvalidSender", "nameLocation": "3213:19:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1765, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1764, "mutability": "mutable", "name": "sender", "nameLocation": "3241:6:2", "nodeType": "VariableDeclaration", "scope": 1766, "src": "3233:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1763, "name": "address", "nodeType": "ElementaryTypeName", "src": "3233:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "3232:16:2"}, "src": "3207:42:2"}, {"documentation": {"id": 1767, "nodeType": "StructuredDocumentation", "src": "3255:159:2", "text": " @dev Indicates a failure with the token `receiver`. Used in transfers.\n @param receiver Address to which tokens are being transferred."}, "errorSelector": "64a0ae92", "id": 1771, "name": "ERC721InvalidReceiver", "nameLocation": "3425:21:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1770, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1769, "mutability": "mutable", "name": "receiver", "nameLocation": "3455:8:2", "nodeType": "VariableDeclaration", "scope": 1771, "src": "3447:16:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1768, "name": "address", "nodeType": "ElementaryTypeName", "src": "3447:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "3446:18:2"}, "src": "3419:46:2"}, {"documentation": {"id": 1772, "nodeType": "StructuredDocumentation", "src": "3471:247:2", "text": " @dev Indicates a failure with the `operator`\u2019s approval. Used in transfers.\n @param operator Address that may be allowed to operate on tokens without being their owner.\n @param tokenId Identifier number of a token."}, "errorSelector": "177e802f", "id": 1778, "name": "ERC721InsufficientApproval", "nameLocation": "3729:26:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1777, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1774, "mutability": "mutable", "name": "operator", "nameLocation": "3764:8:2", "nodeType": "VariableDeclaration", "scope": 1778, "src": "3756:16:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1773, "name": "address", "nodeType": "ElementaryTypeName", "src": "3756:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1776, "mutability": "mutable", "name": "tokenId", "nameLocation": "3782:7:2", "nodeType": "VariableDeclaration", "scope": 1778, "src": "3774:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1775, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3774:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "3755:35:2"}, "src": "3723:68:2"}, {"documentation": {"id": 1779, "nodeType": "StructuredDocumentation", "src": "3797:174:2", "text": " @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.\n @param approver Address initiating an approval operation."}, "errorSelector": "a9fbf51f", "id": 1783, "name": "ERC721InvalidApprover", "nameLocation": "3982:21:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1782, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1781, "mutability": "mutable", "name": "approver", "nameLocation": "4012:8:2", "nodeType": "VariableDeclaration", "scope": 1783, "src": "4004:16:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1780, "name": "address", "nodeType": "ElementaryTypeName", "src": "4004:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "4003:18:2"}, "src": "3976:46:2"}, {"documentation": {"id": 1784, "nodeType": "StructuredDocumentation", "src": "4028:197:2", "text": " @dev Indicates a failure with the `operator` to be approved. Used in approvals.\n @param operator Address that may be allowed to operate on tokens without being their owner."}, "errorSelector": "5b08ba18", "id": 1788, "name": "ERC721InvalidOperator", "nameLocation": "4236:21:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1787, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1786, "mutability": "mutable", "name": "operator", "nameLocation": "4266:8:2", "nodeType": "VariableDeclaration", "scope": 1788, "src": "4258:16:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1785, "name": "address", "nodeType": "ElementaryTypeName", "src": "4258:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "4257:18:2"}, "src": "4230:46:2"}], "scope": 1837, "src": "2186:2092:2", "usedErrors": [1747, 1752, 1761, 1766, 1771, 1778, 1783, 1788], "usedEvents": []}, {"abstract": false, "baseContracts": [], "canonicalName": "IERC1155Errors", "contractDependencies": [], "contractKind": "interface", "documentation": {"id": 1790, "nodeType": "StructuredDocumentation", "src": "4280:143:2", "text": " @dev Standard ERC1155 Errors\n Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens."}, "fullyImplemented": true, "id": 1836, "linearizedBaseContracts": [1836], "name": "IERC1155Errors", "nameLocation": "4434:14:2", "nodeType": "ContractDefinition", "nodes": [{"documentation": {"id": 1791, "nodeType": "StructuredDocumentation", "src": "4455:361:2", "text": " @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.\n @param sender Address whose tokens are being transferred.\n @param balance Current balance for the interacting account.\n @param needed Minimum amount required to perform a transfer.\n @param tokenId Identifier number of a token."}, "errorSelector": "03dee4c5", "id": 1801, "name": "ERC1155InsufficientBalance", "nameLocation": "4827:26:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1800, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1793, "mutability": "mutable", "name": "sender", "nameLocation": "4862:6:2", "nodeType": "VariableDeclaration", "scope": 1801, "src": "4854:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1792, "name": "address", "nodeType": "ElementaryTypeName", "src": "4854:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1795, "mutability": "mutable", "name": "balance", "nameLocation": "4878:7:2", "nodeType": "VariableDeclaration", "scope": 1801, "src": "4870:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1794, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4870:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1797, "mutability": "mutable", "name": "needed", "nameLocation": "4895:6:2", "nodeType": "VariableDeclaration", "scope": 1801, "src": "4887:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1796, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4887:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1799, "mutability": "mutable", "name": "tokenId", "nameLocation": "4911:7:2", "nodeType": "VariableDeclaration", "scope": 1801, "src": "4903:15:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1798, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4903:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "4853:66:2"}, "src": "4821:99:2"}, {"documentation": {"id": 1802, "nodeType": "StructuredDocumentation", "src": "4926:152:2", "text": " @dev Indicates a failure with the token `sender`. Used in transfers.\n @param sender Address whose tokens are being transferred."}, "errorSelector": "01a83514", "id": 1806, "name": "ERC1155InvalidSender", "nameLocation": "5089:20:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1805, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1804, "mutability": "mutable", "name": "sender", "nameLocation": "5118:6:2", "nodeType": "VariableDeclaration", "scope": 1806, "src": "5110:14:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1803, "name": "address", "nodeType": "ElementaryTypeName", "src": "5110:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "5109:16:2"}, "src": "5083:43:2"}, {"documentation": {"id": 1807, "nodeType": "StructuredDocumentation", "src": "5132:159:2", "text": " @dev Indicates a failure with the token `receiver`. Used in transfers.\n @param receiver Address to which tokens are being transferred."}, "errorSelector": "57f447ce", "id": 1811, "name": "ERC1155InvalidReceiver", "nameLocation": "5302:22:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1810, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1809, "mutability": "mutable", "name": "receiver", "nameLocation": "5333:8:2", "nodeType": "VariableDeclaration", "scope": 1811, "src": "5325:16:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1808, "name": "address", "nodeType": "ElementaryTypeName", "src": "5325:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "5324:18:2"}, "src": "5296:47:2"}, {"documentation": {"id": 1812, "nodeType": "StructuredDocumentation", "src": "5349:256:2", "text": " @dev Indicates a failure with the `operator`\u2019s approval. Used in transfers.\n @param operator Address that may be allowed to operate on tokens without being their owner.\n @param owner Address of the current owner of a token."}, "errorSelector": "e237d922", "id": 1818, "name": "ERC1155MissingApprovalForAll", "nameLocation": "5616:28:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1817, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1814, "mutability": "mutable", "name": "operator", "nameLocation": "5653:8:2", "nodeType": "VariableDeclaration", "scope": 1818, "src": "5645:16:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1813, "name": "address", "nodeType": "ElementaryTypeName", "src": "5645:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1816, "mutability": "mutable", "name": "owner", "nameLocation": "5671:5:2", "nodeType": "VariableDeclaration", "scope": 1818, "src": "5663:13:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1815, "name": "address", "nodeType": "ElementaryTypeName", "src": "5663:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "5644:33:2"}, "src": "5610:68:2"}, {"documentation": {"id": 1819, "nodeType": "StructuredDocumentation", "src": "5684:174:2", "text": " @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.\n @param approver Address initiating an approval operation."}, "errorSelector": "3e31884e", "id": 1823, "name": "ERC1155InvalidApprover", "nameLocation": "5869:22:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1822, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1821, "mutability": "mutable", "name": "approver", "nameLocation": "5900:8:2", "nodeType": "VariableDeclaration", "scope": 1823, "src": "5892:16:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1820, "name": "address", "nodeType": "ElementaryTypeName", "src": "5892:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "5891:18:2"}, "src": "5863:47:2"}, {"documentation": {"id": 1824, "nodeType": "StructuredDocumentation", "src": "5916:197:2", "text": " @dev Indicates a failure with the `operator` to be approved. Used in approvals.\n @param operator Address that may be allowed to operate on tokens without being their owner."}, "errorSelector": "ced3e100", "id": 1828, "name": "ERC1155InvalidOperator", "nameLocation": "6124:22:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1827, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1826, "mutability": "mutable", "name": "operator", "nameLocation": "6155:8:2", "nodeType": "VariableDeclaration", "scope": 1828, "src": "6147:16:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1825, "name": "address", "nodeType": "ElementaryTypeName", "src": "6147:7:2", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "6146:18:2"}, "src": "6118:47:2"}, {"documentation": {"id": 1829, "nodeType": "StructuredDocumentation", "src": "6171:280:2", "text": " @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.\n Used in batch transfers.\n @param idsLength Length of the array of token identifiers\n @param valuesLength Length of the array of token amounts"}, "errorSelector": "5b059991", "id": 1835, "name": "ERC1155InvalidArrayLength", "nameLocation": "6462:25:2", "nodeType": "ErrorDefinition", "parameters": {"id": 1834, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1831, "mutability": "mutable", "name": "idsLength", "nameLocation": "6496:9:2", "nodeType": "VariableDeclaration", "scope": 1835, "src": "6488:17:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1830, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6488:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1833, "mutability": "mutable", "name": "valuesLength", "nameLocation": "6515:12:2", "nodeType": "VariableDeclaration", "scope": 1835, "src": "6507:20:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1832, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6507:7:2", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "6487:41:2"}, "src": "6456:73:2"}], "scope": 1837, "src": "4424:2107:2", "usedErrors": [1801, 1806, 1811, 1818, 1823, 1828, 1835], "usedEvents": []}], "src": "112:6420:2"}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/token/ERC721/ERC721.sol": {"AST": {"absolutePath": "lib/openzeppelin-contracts/contracts/token/ERC721/ERC721.sol", "exportedSymbols": {"Context": [1699], "ERC165": [2278], "ERC721": [1669], "IERC165": [2290], "IERC721": [1953], "IERC721Errors": [1789], "IERC721Metadata": [1999], "IERC721Receiver": [1971], "Strings": [2254]}, "id": 1670, "license": "MIT", "nodeType": "SourceUnit", "nodes": [{"id": 662, "literals": ["solidity", "^", "0.8", ".20"], "nodeType": "PragmaDirective", "src": "107:24:3"}, {"absolutePath": "lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol", "file": "./IERC721.sol", "id": 664, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 1670, "sourceUnit": 1954, "src": "133:38:3", "symbolAliases": [{"foreign": {"id": 663, "name": "IERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1953, "src": "141:7:3", "typeDescriptions": {}}, "nameLocation": "-1:-1:-1"}], "unitAlias": ""}, {"absolutePath": "lib/openzeppelin-contracts/contracts/token/ERC721/IERC721Receiver.sol", "file": "./IERC721Receiver.sol", "id": 666, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 1670, "sourceUnit": 1972, "src": "172:54:3", "symbolAliases": [{"foreign": {"id": 665, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1971, "src": "180:15:3", "typeDescriptions": {}}, "nameLocation": "-1:-1:-1"}], "unitAlias": ""}, {"absolutePath": "lib/openzeppelin-contracts/contracts/token/ERC721/extensions/IERC721Metadata.sol", "file": "./extensions/IERC721Metadata.sol", "id": 668, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 1670, "sourceUnit": 2000, "src": "227:65:3", "symbolAliases": [{"foreign": {"id": 667, "name": "IERC721Metadata", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1999, "src": "235:15:3", "typeDescriptions": {}}, "nameLocation": "-1:-1:-1"}], "unitAlias": ""}, {"absolutePath": "lib/openzeppelin-contracts/contracts/utils/Context.sol", "file": "../../utils/Context.sol", "id": 670, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 1670, "sourceUnit": 1700, "src": "293:48:3", "symbolAliases": [{"foreign": {"id": 669, "name": "Context", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1699, "src": "301:7:3", "typeDescriptions": {}}, "nameLocation": "-1:-1:-1"}], "unitAlias": ""}, {"absolutePath": "lib/openzeppelin-contracts/contracts/utils/Strings.sol", "file": "../../utils/Strings.sol", "id": 672, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 1670, "sourceUnit": 2255, "src": "342:48:3", "symbolAliases": [{"foreign": {"id": 671, "name": "Strings", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2254, "src": "350:7:3", "typeDescriptions": {}}, "nameLocation": "-1:-1:-1"}], "unitAlias": ""}, {"absolutePath": "lib/openzeppelin-contracts/contracts/utils/introspection/ERC165.sol", "file": "../../utils/introspection/ERC165.sol", "id": 675, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 1670, "sourceUnit": 2279, "src": "391:69:3", "symbolAliases": [{"foreign": {"id": 673, "name": "IERC165", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2290, "src": "399:7:3", "typeDescriptions": {}}, "nameLocation": "-1:-1:-1"}, {"foreign": {"id": 674, "name": "ERC165", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2278, "src": "408:6:3", "typeDescriptions": {}}, "nameLocation": "-1:-1:-1"}], "unitAlias": ""}, {"absolutePath": "lib/openzeppelin-contracts/contracts/interfaces/draft-IERC6093.sol", "file": "../../interfaces/draft-IERC6093.sol", "id": 677, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 1670, "sourceUnit": 1837, "src": "461:66:3", "symbolAliases": [{"foreign": {"id": 676, "name": "IERC721Errors", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1789, "src": "469:13:3", "typeDescriptions": {}}, "nameLocation": "-1:-1:-1"}], "unitAlias": ""}, {"abstract": true, "baseContracts": [{"baseName": {"id": 679, "name": "Context", "nameLocations": ["804:7:3"], "nodeType": "IdentifierPath", "referencedDeclaration": 1699, "src": "804:7:3"}, "id": 680, "nodeType": "InheritanceSpecifier", "src": "804:7:3"}, {"baseName": {"id": 681, "name": "ERC165", "nameLocations": ["813:6:3"], "nodeType": "IdentifierPath", "referencedDeclaration": 2278, "src": "813:6:3"}, "id": 682, "nodeType": "InheritanceSpecifier", "src": "813:6:3"}, {"baseName": {"id": 683, "name": "IERC721", "nameLocations": ["821:7:3"], "nodeType": "IdentifierPath", "referencedDeclaration": 1953, "src": "821:7:3"}, "id": 684, "nodeType": "InheritanceSpecifier", "src": "821:7:3"}, {"baseName": {"id": 685, "name": "IERC721Metadata", "nameLocations": ["830:15:3"], "nodeType": "IdentifierPath", "referencedDeclaration": 1999, "src": "830:15:3"}, "id": 686, "nodeType": "InheritanceSpecifier", "src": "830:15:3"}, {"baseName": {"id": 687, "name": "IERC721Errors", "nameLocations": ["847:13:3"], "nodeType": "IdentifierPath", "referencedDeclaration": 1789, "src": "847:13:3"}, "id": 688, "nodeType": "InheritanceSpecifier", "src": "847:13:3"}], "canonicalName": "ERC721", "contractDependencies": [], "contractKind": "contract", "documentation": {"id": 678, "nodeType": "StructuredDocumentation", "src": "529:246:3", "text": " @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including\n the Metadata extension, but not including the Enumerable extension, which is available separately as\n {ERC721Enumerable}."}, "fullyImplemented": true, "id": 1669, "linearizedBaseContracts": [1669, 1789, 1999, 1953, 2278, 2290, 1699], "name": "ERC721", "nameLocation": "794:6:3", "nodeType": "ContractDefinition", "nodes": [{"global": false, "id": 691, "libraryName": {"id": 689, "name": "Strings", "nameLocations": ["873:7:3"], "nodeType": "IdentifierPath", "referencedDeclaration": 2254, "src": "873:7:3"}, "nodeType": "UsingForDirective", "src": "867:26:3", "typeName": {"id": 690, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "885:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}}, {"constant": false, "id": 693, "mutability": "mutable", "name": "_name", "nameLocation": "932:5:3", "nodeType": "VariableDeclaration", "scope": 1669, "src": "917:20:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_string_storage", "typeString": "string"}, "typeName": {"id": 692, "name": "string", "nodeType": "ElementaryTypeName", "src": "917:6:3", "typeDescriptions": {"typeIdentifier": "t_string_storage_ptr", "typeString": "string"}}, "visibility": "private"}, {"constant": false, "id": 695, "mutability": "mutable", "name": "_symbol", "nameLocation": "979:7:3", "nodeType": "VariableDeclaration", "scope": 1669, "src": "964:22:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_string_storage", "typeString": "string"}, "typeName": {"id": 694, "name": "string", "nodeType": "ElementaryTypeName", "src": "964:6:3", "typeDescriptions": {"typeIdentifier": "t_string_storage_ptr", "typeString": "string"}}, "visibility": "private"}, {"constant": false, "id": 699, "mutability": "mutable", "name": "_owners", "nameLocation": "1037:7:3", "nodeType": "VariableDeclaration", "scope": 1669, "src": "993:51:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)"}, "typeName": {"id": 698, "keyName": "tokenId", "keyNameLocation": "1009:7:3", "keyType": {"id": 696, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1001:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "Mapping", "src": "993:35:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)"}, "valueName": "", "valueNameLocation": "-1:-1:-1", "valueType": {"id": 697, "name": "address", "nodeType": 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"valueType": {"id": 701, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1076:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}}, "visibility": "private"}, {"constant": false, "id": 707, "mutability": "mutable", "name": "_tokenApprovals", "nameLocation": "1153:15:3", "nodeType": "VariableDeclaration", "scope": 1669, "src": "1109:59:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)"}, "typeName": {"id": 706, "keyName": "tokenId", "keyNameLocation": "1125:7:3", "keyType": {"id": 704, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1117:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "Mapping", "src": "1109:35:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)"}, "valueName": "", 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"typeString": "function (address,address,uint256)"}}, "id": 1011, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "5098:31:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1012, "nodeType": "ExpressionStatement", "src": "5098:31:3"}, {"expression": {"arguments": [{"id": 1014, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 998, "src": "5162:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1015, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1000, "src": "5168:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1016, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1002, "src": "5172:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"id": 1017, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1004, "src": "5181:4:3", "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}, {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}], "id": 1013, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1668, "src": "5139:22:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,address,uint256,bytes memory)"}}, "id": 1018, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "5139:47:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1019, "nodeType": "ExpressionStatement", "src": "5139:47:3"}]}, "documentation": {"id": 996, "nodeType": "StructuredDocumentation", "src": "4925:55:3", "text": " @dev See {IERC721-safeTransferFrom}."}, "functionSelector": "b88d4fde", "id": 1021, "implemented": true, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nameLocation": "4994:16:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1005, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 998, "mutability": "mutable", "name": "from", "nameLocation": "5019:4:3", "nodeType": "VariableDeclaration", "scope": 1021, "src": "5011:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 997, "name": "address", "nodeType": "ElementaryTypeName", "src": "5011:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1000, "mutability": "mutable", "name": "to", "nameLocation": "5033:2:3", "nodeType": "VariableDeclaration", "scope": 1021, "src": "5025:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 999, "name": "address", "nodeType": "ElementaryTypeName", "src": "5025:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1002, "mutability": "mutable", "name": "tokenId", "nameLocation": "5045:7:3", "nodeType": "VariableDeclaration", "scope": 1021, "src": "5037:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1001, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5037:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1004, "mutability": "mutable", "name": "data", "nameLocation": "5067:4:3", "nodeType": "VariableDeclaration", "scope": 1021, "src": "5054:17:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes"}, "typeName": {"id": 1003, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "5054:5:3", "typeDescriptions": {"typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes"}}, "visibility": "internal"}], "src": "5010:62:3"}, "returnParameters": {"id": 1006, "nodeType": "ParameterList", "parameters": [], "src": "5088:0:3"}, "scope": 1669, "src": "4985:208:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "public"}, {"body": {"id": 1033, "nodeType": "Block", "src": "5782:40:3", "statements": [{"expression": {"baseExpression": {"id": 1029, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 699, "src": "5799:7:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)"}}, "id": 1031, "indexExpression": {"id": 1030, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1024, "src": "5807:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "5799:16:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "functionReturnParameters": 1028, "id": 1032, "nodeType": "Return", "src": "5792:23:3"}]}, "documentation": {"id": 1022, "nodeType": "StructuredDocumentation", "src": "5199:503:3", "text": " @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist\n IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the\n core ERC721 logic MUST be matched with the use of {_increaseBalance} to keep balances\n consistent with ownership. The invariant to preserve is that for any address `a` the value returned by\n `balanceOf(a)` must be equal to the number of tokens such that `_ownerOf(tokenId)` is `a`."}, "id": 1034, "implemented": true, "kind": "function", "modifiers": [], "name": "_ownerOf", "nameLocation": "5716:8:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1025, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1024, "mutability": "mutable", "name": "tokenId", "nameLocation": "5733:7:3", "nodeType": "VariableDeclaration", "scope": 1034, "src": "5725:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1023, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5725:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "5724:17:3"}, "returnParameters": {"id": 1028, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1027, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 1034, "src": "5773:7:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1026, "name": "address", "nodeType": "ElementaryTypeName", "src": "5773:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "5772:9:3"}, "scope": 1669, "src": "5707:115:3", "stateMutability": "view", "virtual": true, "visibility": "internal"}, {"body": {"id": 1046, "nodeType": "Block", "src": "6017:48:3", "statements": [{"expression": {"baseExpression": {"id": 1042, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 707, "src": "6034:15:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)"}}, "id": 1044, "indexExpression": {"id": 1043, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1037, "src": "6050:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "6034:24:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "functionReturnParameters": 1041, "id": 1045, "nodeType": "Return", "src": "6027:31:3"}]}, "documentation": {"id": 1035, "nodeType": "StructuredDocumentation", "src": "5828:105:3", "text": " @dev Returns the approved address for `tokenId`. Returns 0 if `tokenId` is not minted."}, "id": 1047, "implemented": true, "kind": "function", "modifiers": [], "name": "_getApproved", "nameLocation": "5947:12:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1038, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1037, "mutability": "mutable", "name": "tokenId", "nameLocation": "5968:7:3", "nodeType": "VariableDeclaration", "scope": 1047, "src": "5960:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1036, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5960:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "5959:17:3"}, "returnParameters": {"id": 1041, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1040, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 1047, "src": "6008:7:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1039, "name": "address", "nodeType": "ElementaryTypeName", "src": "6008:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "6007:9:3"}, "scope": 1669, "src": "5938:127:3", "stateMutability": "view", "virtual": true, "visibility": "internal"}, {"body": {"id": 1082, "nodeType": "Block", "src": "6485:163:3", "statements": [{"expression": {"commonType": {"typeIdentifier": "t_bool", "typeString": "bool"}, "id": 1080, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1064, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1059, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1052, "src": "6514:7:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1062, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6533:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1061, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6525:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1060, "name": "address", "nodeType": "ElementaryTypeName", "src": "6525:7:3", "typeDescriptions": {}}}, "id": 1063, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "6525:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "6514:21:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": {"components": [{"commonType": {"typeIdentifier": "t_bool", "typeString": "bool"}, "id": 1078, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"commonType": {"typeIdentifier": "t_bool", "typeString": "bool"}, "id": 1072, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1067, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1065, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1050, "src": "6552:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": {"id": 1066, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1052, "src": "6561:7:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "6552:16:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": {"arguments": [{"id": 1069, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1050, "src": "6589:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1070, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1052, "src": "6596:7:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}], "id": 1068, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 931, "src": "6572:16:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)"}}, "id": 1071, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "6572:32:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "src": "6552:52:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1077, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"arguments": [{"id": 1074, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1054, "src": "6621:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1073, "name": "_getApproved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1047, "src": "6608:12:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)"}}, "id": 1075, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "6608:21:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": {"id": 1076, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1052, "src": "6633:7:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "6608:32:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "src": "6552:88:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}], "id": 1079, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "6551:90:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "src": "6514:127:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "functionReturnParameters": 1058, "id": 1081, "nodeType": "Return", "src": "6495:146:3"}]}, "documentation": {"id": 1048, "nodeType": "StructuredDocumentation", "src": "6071:300:3", "text": " @dev Returns whether `spender` is allowed to manage `owner`'s tokens, or `tokenId` in\n particular (ignoring whether it is owned by `owner`).\n WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this\n assumption."}, "id": 1083, "implemented": true, "kind": "function", "modifiers": [], "name": "_isAuthorized", "nameLocation": "6385:13:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1055, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1050, "mutability": "mutable", "name": "owner", "nameLocation": "6407:5:3", "nodeType": "VariableDeclaration", "scope": 1083, "src": "6399:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1049, "name": "address", "nodeType": "ElementaryTypeName", "src": "6399:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1052, "mutability": "mutable", "name": "spender", "nameLocation": "6422:7:3", "nodeType": "VariableDeclaration", "scope": 1083, "src": "6414:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1051, "name": "address", "nodeType": "ElementaryTypeName", "src": "6414:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1054, "mutability": "mutable", "name": "tokenId", "nameLocation": "6439:7:3", "nodeType": "VariableDeclaration", "scope": 1083, "src": "6431:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1053, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6431:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "6398:49:3"}, "returnParameters": {"id": 1058, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1057, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 1083, "src": "6479:4:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}, "typeName": {"id": 1056, "name": "bool", "nodeType": "ElementaryTypeName", "src": "6479:4:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "visibility": "internal"}], "src": "6478:6:3"}, "scope": 1669, "src": "6376:272:3", "stateMutability": "view", "virtual": true, "visibility": "internal"}, {"body": {"id": 1119, "nodeType": "Block", "src": "7179:271:3", "statements": [{"condition": {"id": 1098, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "7193:39:3", "subExpression": {"arguments": [{"id": 1094, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1086, "src": "7208:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1095, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1088, "src": "7215:7:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1096, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1090, "src": "7224:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1093, "name": "_isAuthorized", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1083, "src": "7194:13:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$_t_uint256_$returns$_t_bool_$", "typeString": "function (address,address,uint256) view returns (bool)"}}, "id": 1097, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "7194:38:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1118, "nodeType": "IfStatement", "src": "7189:255:3", "trueBody": {"id": 1117, "nodeType": "Block", "src": "7234:210:3", "statements": [{"condition": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1104, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1099, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1086, "src": "7252:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1102, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7269:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1101, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7261:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1100, "name": "address", "nodeType": "ElementaryTypeName", "src": "7261:7:3", "typeDescriptions": {}}}, "id": 1103, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "7261:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "7252:19:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "falseBody": {"id": 1115, "nodeType": "Block", "src": "7350:84:3", "statements": [{"errorCall": {"arguments": [{"id": 1111, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1088, "src": "7402:7:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1112, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1090, "src": "7411:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1110, "name": "ERC721InsufficientApproval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1778, "src": "7375:26:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,uint256) pure"}}, "id": 1113, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "7375:44:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1114, "nodeType": "RevertStatement", "src": "7368:51:3"}]}, "id": 1116, "nodeType": "IfStatement", "src": "7248:186:3", "trueBody": {"id": 1109, "nodeType": "Block", "src": "7273:71:3", "statements": [{"errorCall": {"arguments": [{"id": 1106, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1090, "src": "7321:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1105, "name": "ERC721NonexistentToken", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1752, "src": "7298:22:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_uint256_$returns$__$", "typeString": "function (uint256) pure"}}, "id": 1107, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "7298:31:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1108, "nodeType": "RevertStatement", "src": "7291:38:3"}]}}]}}]}, "documentation": {"id": 1084, "nodeType": "StructuredDocumentation", "src": "6654:423:3", "text": " @dev Checks if `spender` can operate on `tokenId`, assuming the provided `owner` is the actual owner.\n Reverts if `spender` does not have approval from the provided `owner` for the given token or for all its assets\n the `spender` for the specific `tokenId`.\n WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this\n assumption."}, "id": 1120, "implemented": true, "kind": "function", "modifiers": [], "name": "_checkAuthorized", "nameLocation": "7091:16:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1091, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1086, "mutability": "mutable", "name": "owner", "nameLocation": "7116:5:3", "nodeType": "VariableDeclaration", "scope": 1120, "src": "7108:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1085, "name": "address", "nodeType": "ElementaryTypeName", "src": "7108:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1088, "mutability": "mutable", "name": "spender", "nameLocation": "7131:7:3", "nodeType": "VariableDeclaration", "scope": 1120, "src": "7123:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1087, "name": "address", "nodeType": "ElementaryTypeName", "src": "7123:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1090, "mutability": "mutable", "name": "tokenId", "nameLocation": "7148:7:3", "nodeType": "VariableDeclaration", "scope": 1120, "src": "7140:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1089, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7140:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "7107:49:3"}, "returnParameters": {"id": 1092, "nodeType": "ParameterList", "parameters": [], "src": "7179:0:3"}, "scope": 1669, "src": "7082:368:3", "stateMutability": "view", "virtual": true, "visibility": "internal"}, {"body": {"id": 1135, "nodeType": "Block", "src": "8167:78:3", "statements": [{"id": 1134, "nodeType": "UncheckedBlock", "src": "8177:62:3", "statements": [{"expression": {"id": 1132, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": {"baseExpression": {"id": 1128, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 703, "src": "8201:9:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)"}}, "id": 1130, "indexExpression": {"id": 1129, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1123, "src": "8211:7:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8201:18:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "Assignment", "operator": "+=", "rightHandSide": {"id": 1131, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1125, "src": "8223:5:3", "typeDescriptions": {"typeIdentifier": "t_uint128", "typeString": "uint128"}}, "src": "8201:27:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "id": 1133, "nodeType": "ExpressionStatement", "src": "8201:27:3"}]}]}, "documentation": {"id": 1121, "nodeType": "StructuredDocumentation", "src": "7456:631:3", "text": " @dev Unsafe write access to the balances, used by extensions that \"mint\" tokens using an {ownerOf} override.\n NOTE: the value is limited to type(uint128).max. This protect against _balance overflow. It is unrealistic that\n a uint256 would ever overflow from increments when these increments are bounded to uint128 values.\n WARNING: Increasing an account's balance using this function tends to be paired with an override of the\n {_ownerOf} function to resolve the ownership of the corresponding tokens so that balances and ownership\n remain consistent with one another."}, "id": 1136, "implemented": true, "kind": "function", "modifiers": [], "name": "_increaseBalance", "nameLocation": "8101:16:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1126, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1123, "mutability": "mutable", "name": "account", "nameLocation": "8126:7:3", "nodeType": "VariableDeclaration", "scope": 1136, "src": "8118:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1122, "name": "address", "nodeType": "ElementaryTypeName", "src": "8118:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1125, "mutability": "mutable", "name": "value", "nameLocation": "8143:5:3", "nodeType": "VariableDeclaration", "scope": 1136, "src": "8135:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint128", "typeString": "uint128"}, "typeName": {"id": 1124, "name": "uint128", "nodeType": "ElementaryTypeName", "src": "8135:7:3", "typeDescriptions": {"typeIdentifier": "t_uint128", "typeString": "uint128"}}, "visibility": "internal"}], "src": "8117:32:3"}, "returnParameters": {"id": 1127, "nodeType": "ParameterList", "parameters": [], "src": "8167:0:3"}, "scope": 1669, "src": "8092:153:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal"}, {"body": {"id": 1225, "nodeType": "Block", "src": "8933:700:3", "statements": [{"assignments": [1149], "declarations": [{"constant": false, "id": 1149, "mutability": "mutable", "name": "from", "nameLocation": "8951:4:3", "nodeType": "VariableDeclaration", "scope": 1225, "src": "8943:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1148, "name": "address", "nodeType": "ElementaryTypeName", "src": "8943:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "id": 1153, "initialValue": {"arguments": [{"id": 1151, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1141, "src": "8967:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1150, "name": "_ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1034, "src": "8958:8:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)"}}, "id": 1152, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "8958:17:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "VariableDeclarationStatement", "src": "8943:32:3"}, {"condition": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1159, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1154, "name": "auth", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1143, "src": "9035:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1157, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9051:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1156, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9043:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1155, "name": "address", "nodeType": "ElementaryTypeName", "src": "9043:7:3", "typeDescriptions": {}}}, "id": 1158, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "9043:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "9035:18:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1167, "nodeType": "IfStatement", "src": "9031:86:3", "trueBody": {"id": 1166, "nodeType": "Block", "src": "9055:62:3", "statements": [{"expression": {"arguments": [{"id": 1161, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1149, "src": "9086:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1162, "name": "auth", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1143, "src": "9092:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1163, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1141, "src": "9098:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1160, "name": "_checkAuthorized", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1120, "src": "9069:16:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256) view"}}, "id": 1164, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "9069:37:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1165, "nodeType": "ExpressionStatement", "src": "9069:37:3"}]}}, {"condition": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1173, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1168, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1149, "src": "9161:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1171, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9177:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1170, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9169:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1169, "name": "address", "nodeType": "ElementaryTypeName", "src": "9169:7:3", "typeDescriptions": {}}}, "id": 1172, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "9169:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "9161:18:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1195, "nodeType": "IfStatement", "src": "9157:256:3", "trueBody": {"id": 1194, "nodeType": "Block", "src": "9181:232:3", "statements": [{"expression": {"arguments": [{"arguments": [{"hexValue": "30", "id": 1177, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9294:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1176, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9286:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1175, "name": "address", "nodeType": "ElementaryTypeName", "src": "9286:7:3", "typeDescriptions": {}}}, "id": 1178, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "9286:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1179, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1141, "src": "9298:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"arguments": [{"hexValue": "30", "id": 1182, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9315:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1181, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9307:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1180, "name": "address", "nodeType": "ElementaryTypeName", "src": "9307:7:3", "typeDescriptions": {}}}, "id": 1183, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "9307:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"hexValue": "66616c7365", "id": 1184, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "9319:5:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}, "value": "false"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_bool", "typeString": "bool"}], "id": 1174, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [1472, 1538], "referencedDeclaration": 1538, "src": "9277:8:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$_t_address_$_t_bool_$returns$__$", "typeString": "function (address,uint256,address,bool)"}}, "id": 1185, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "9277:48:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1186, "nodeType": "ExpressionStatement", "src": "9277:48:3"}, {"id": 1193, "nodeType": "UncheckedBlock", "src": "9340:63:3", "statements": [{"expression": {"id": 1191, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": {"baseExpression": {"id": 1187, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 703, "src": "9368:9:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)"}}, "id": 1189, "indexExpression": {"id": 1188, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1149, "src": "9378:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9368:15:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "Assignment", "operator": "-=", "rightHandSide": {"hexValue": "31", "id": 1190, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9387:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1"}, "value": "1"}, "src": "9368:20:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "id": 1192, "nodeType": "ExpressionStatement", "src": "9368:20:3"}]}]}}, {"condition": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1201, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1196, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1139, "src": "9427:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1199, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9441:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1198, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "9433:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1197, "name": "address", "nodeType": "ElementaryTypeName", "src": "9433:7:3", "typeDescriptions": {}}}, "id": 1200, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "9433:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "9427:16:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1210, "nodeType": "IfStatement", "src": "9423:107:3", "trueBody": {"id": 1209, "nodeType": "Block", "src": "9445:85:3", "statements": [{"id": 1208, "nodeType": "UncheckedBlock", "src": "9459:61:3", "statements": [{"expression": {"id": 1206, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": {"baseExpression": {"id": 1202, "name": "_balances", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 703, "src": "9487:9:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)"}}, "id": 1204, "indexExpression": {"id": 1203, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1139, "src": "9497:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9487:13:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "Assignment", "operator": "+=", "rightHandSide": {"hexValue": "31", "id": 1205, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "9504:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1"}, "value": "1"}, "src": "9487:18:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "id": 1207, "nodeType": "ExpressionStatement", "src": "9487:18:3"}]}]}}, {"expression": {"id": 1215, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": {"baseExpression": {"id": 1211, "name": "_owners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 699, "src": "9540:7:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)"}}, "id": 1213, "indexExpression": {"id": 1212, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1141, "src": "9548:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "9540:16:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "Assignment", "operator": "=", "rightHandSide": {"id": 1214, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1139, "src": "9559:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "9540:21:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "id": 1216, "nodeType": "ExpressionStatement", "src": "9540:21:3"}, {"eventCall": {"arguments": [{"id": 1218, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1149, "src": "9586:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1219, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1139, "src": "9592:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1220, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1141, "src": "9596:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1217, "name": "Transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1852, "src": "9577:8:3", "typeDescriptions": {"typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)"}}, "id": 1221, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "9577:27:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1222, "nodeType": "EmitStatement", "src": "9572:32:3"}, {"expression": {"id": 1223, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1149, "src": "9622:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "functionReturnParameters": 1147, "id": 1224, "nodeType": "Return", "src": "9615:11:3"}]}, "documentation": {"id": 1137, "nodeType": "StructuredDocumentation", "src": "8251:582:3", "text": " @dev Transfers `tokenId` from its current owner to `to`, or alternatively mints (or burns) if the current owner\n (or `to`) is the zero address. Returns the owner of the `tokenId` before the update.\n The `auth` argument is optional. If the value passed is non 0, then this function will check that\n `auth` is either the owner of the token, or approved to operate on the token (by the owner).\n Emits a {Transfer} event.\n NOTE: If overriding this function in a way that tracks balances, see also {_increaseBalance}."}, "id": 1226, "implemented": true, "kind": "function", "modifiers": [], "name": "_update", "nameLocation": "8847:7:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1144, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1139, "mutability": "mutable", "name": "to", "nameLocation": "8863:2:3", "nodeType": "VariableDeclaration", "scope": 1226, "src": "8855:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1138, "name": "address", "nodeType": "ElementaryTypeName", "src": "8855:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1141, "mutability": "mutable", "name": "tokenId", "nameLocation": "8875:7:3", "nodeType": "VariableDeclaration", "scope": 1226, "src": "8867:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1140, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8867:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1143, "mutability": "mutable", "name": "auth", "nameLocation": "8892:4:3", "nodeType": "VariableDeclaration", "scope": 1226, "src": "8884:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1142, "name": "address", "nodeType": "ElementaryTypeName", "src": "8884:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "8854:43:3"}, "returnParameters": {"id": 1147, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1146, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 1226, "src": "8924:7:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1145, "name": "address", "nodeType": "ElementaryTypeName", "src": "8924:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "8923:9:3"}, "scope": 1669, "src": "8838:795:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal"}, {"body": {"id": 1275, "nodeType": "Block", "src": "10008:274:3", "statements": [{"condition": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1239, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1234, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1229, "src": "10022:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1237, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10036:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1236, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10028:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1235, "name": "address", "nodeType": "ElementaryTypeName", "src": "10028:7:3", "typeDescriptions": {}}}, "id": 1238, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "10028:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "10022:16:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1248, "nodeType": "IfStatement", "src": "10018:87:3", "trueBody": {"id": 1247, "nodeType": "Block", "src": "10040:65:3", "statements": [{"errorCall": {"arguments": [{"arguments": [{"hexValue": "30", "id": 1243, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10091:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1242, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10083:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1241, "name": "address", "nodeType": "ElementaryTypeName", "src": "10083:7:3", "typeDescriptions": {}}}, "id": 1244, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "10083:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}], "id": 1240, "name": "ERC721InvalidReceiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1771, "src": "10061:21:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_address_$returns$__$", "typeString": "function (address) pure"}}, "id": 1245, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "10061:33:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1246, "nodeType": "RevertStatement", "src": "10054:40:3"}]}}, {"assignments": [1250], "declarations": [{"constant": false, "id": 1250, "mutability": "mutable", "name": "previousOwner", "nameLocation": "10122:13:3", "nodeType": "VariableDeclaration", "scope": 1275, "src": "10114:21:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1249, "name": "address", "nodeType": "ElementaryTypeName", "src": "10114:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "id": 1259, "initialValue": {"arguments": [{"id": 1252, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1229, "src": "10146:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1253, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1231, "src": "10150:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"arguments": [{"hexValue": "30", "id": 1256, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10167:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1255, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10159:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1254, "name": "address", "nodeType": "ElementaryTypeName", "src": "10159:7:3", "typeDescriptions": {}}}, "id": 1257, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "10159:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}, {"typeIdentifier": "t_address", "typeString": "address"}], "id": 1251, "name": "_update", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1226, "src": "10138:7:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$_t_address_$returns$_t_address_$", "typeString": "function (address,uint256,address) returns (address)"}}, "id": 1258, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "10138:32:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "VariableDeclarationStatement", "src": "10114:56:3"}, {"condition": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1265, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1260, "name": "previousOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1250, "src": "10184:13:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1263, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10209:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1262, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10201:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1261, "name": "address", "nodeType": "ElementaryTypeName", "src": "10201:7:3", "typeDescriptions": {}}}, "id": 1264, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "10201:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "10184:27:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1274, "nodeType": "IfStatement", "src": "10180:96:3", "trueBody": {"id": 1273, "nodeType": "Block", "src": "10213:63:3", "statements": [{"errorCall": {"arguments": [{"arguments": [{"hexValue": "30", "id": 1269, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "10262:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1268, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "10254:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1267, "name": "address", "nodeType": "ElementaryTypeName", "src": "10254:7:3", "typeDescriptions": {}}}, "id": 1270, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "10254:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}], "id": 1266, "name": "ERC721InvalidSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1766, "src": "10234:19:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_address_$returns$__$", "typeString": "function (address) pure"}}, "id": 1271, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "10234:31:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1272, "nodeType": "RevertStatement", "src": "10227:38:3"}]}}]}, "documentation": {"id": 1227, "nodeType": "StructuredDocumentation", "src": "9639:311:3", "text": " @dev Mints `tokenId` and transfers it to `to`.\n WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible\n Requirements:\n - `tokenId` must not exist.\n - `to` cannot be the zero address.\n Emits a {Transfer} event."}, "id": 1276, "implemented": true, "kind": "function", "modifiers": [], "name": "_mint", "nameLocation": "9964:5:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1232, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1229, "mutability": "mutable", "name": "to", "nameLocation": "9978:2:3", "nodeType": "VariableDeclaration", "scope": 1276, "src": "9970:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1228, "name": "address", "nodeType": "ElementaryTypeName", "src": "9970:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1231, "mutability": "mutable", "name": "tokenId", "nameLocation": "9990:7:3", "nodeType": "VariableDeclaration", "scope": 1276, "src": "9982:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1230, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "9982:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "9969:29:3"}, "returnParameters": {"id": 1233, "nodeType": "ParameterList", "parameters": [], "src": "10008:0:3"}, "scope": 1669, "src": "9955:327:3", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal"}, {"body": {"id": 1290, "nodeType": "Block", "src": "10690:43:3", "statements": [{"expression": {"arguments": [{"id": 1285, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1279, "src": "10710:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1286, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1281, "src": "10714:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"hexValue": "", "id": 1287, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "10723:2:3", "typeDescriptions": {"typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\""}, "value": ""}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}, {"typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\""}], "id": 1284, "name": "_safeMint", "nodeType": "Identifier", "overloadedDeclarations": [1291, 1317], "referencedDeclaration": 1317, "src": "10700:9:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,uint256,bytes memory)"}}, "id": 1288, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "10700:26:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1289, "nodeType": "ExpressionStatement", "src": "10700:26:3"}]}, "documentation": {"id": 1277, "nodeType": "StructuredDocumentation", "src": "10288:340:3", "text": " @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance.\n Requirements:\n - `tokenId` must not exist.\n - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n Emits a {Transfer} event."}, "id": 1291, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeMint", "nameLocation": "10642:9:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1282, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1279, "mutability": "mutable", "name": "to", "nameLocation": "10660:2:3", "nodeType": "VariableDeclaration", "scope": 1291, "src": "10652:10:3", "stateVariable": false, "storageLocation": "default", 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"stateMutability": "nonpayable", "virtual": false, "visibility": "internal"}, {"body": {"id": 1316, "nodeType": "Block", "src": "11038:98:3", "statements": [{"expression": {"arguments": [{"id": 1302, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1294, "src": "11054:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1303, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1296, "src": "11058:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1301, "name": "_mint", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1276, "src": "11048:5:3", "typeDescriptions": {"typeIdentifier": 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"lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11099:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1307, "name": "address", "nodeType": "ElementaryTypeName", "src": "11099:7:3", "typeDescriptions": {}}}, "id": 1310, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "11099:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1311, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1294, "src": "11111:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1312, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1296, "src": "11115:7:3", "typeDescriptions": {"typeIdentifier": 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"functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "11076:53:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1315, "nodeType": "ExpressionStatement", "src": "11076:53:3"}]}, "documentation": {"id": 1292, "nodeType": "StructuredDocumentation", "src": "10739:210:3", "text": " @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is\n forwarded in {IERC721Receiver-onERC721Received} to contract recipients."}, "id": 1317, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeMint", "nameLocation": "10963:9:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1299, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1294, "mutability": "mutable", "name": "to", "nameLocation": "10981:2:3", "nodeType": "VariableDeclaration", "scope": 1317, "src": "10973:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1293, "name": "address", "nodeType": "ElementaryTypeName", "src": "10973:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1296, "mutability": "mutable", "name": "tokenId", "nameLocation": "10993:7:3", "nodeType": "VariableDeclaration", "scope": 1317, "src": "10985:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1295, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "10985:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1298, "mutability": "mutable", "name": "data", "nameLocation": "11015:4:3", "nodeType": "VariableDeclaration", "scope": 1317, "src": "11002:17:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes"}, "typeName": {"id": 1297, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "11002:5:3", "typeDescriptions": {"typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes"}}, "visibility": "internal"}], "src": "10972:48:3"}, "returnParameters": {"id": 1300, "nodeType": "ParameterList", "parameters": [], "src": "11038:0:3"}, "scope": 1669, "src": "10954:182:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal"}, {"body": {"id": 1349, "nodeType": "Block", "src": "11503:186:3", "statements": [{"assignments": [1324], "declarations": [{"constant": false, "id": 1324, "mutability": "mutable", "name": "previousOwner", "nameLocation": "11521:13:3", "nodeType": "VariableDeclaration", "scope": 1349, "src": "11513:21:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1323, "name": "address", "nodeType": "ElementaryTypeName", "src": "11513:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "id": 1336, "initialValue": {"arguments": [{"arguments": [{"hexValue": "30", "id": 1328, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11553:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1327, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11545:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1326, "name": "address", "nodeType": "ElementaryTypeName", "src": "11545:7:3", "typeDescriptions": {}}}, "id": 1329, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "11545:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1330, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1320, "src": "11557:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"arguments": [{"hexValue": "30", "id": 1333, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11574:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1332, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11566:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1331, "name": "address", "nodeType": "ElementaryTypeName", "src": "11566:7:3", "typeDescriptions": {}}}, "id": 1334, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "11566:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}, {"typeIdentifier": "t_address", "typeString": "address"}], "id": 1325, "name": "_update", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1226, "src": "11537:7:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$_t_address_$returns$_t_address_$", "typeString": "function (address,uint256,address) returns (address)"}}, "id": 1335, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "11537:40:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "VariableDeclarationStatement", "src": "11513:64:3"}, {"condition": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1342, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1337, "name": "previousOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1324, "src": "11591:13:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1340, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "11616:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1339, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "11608:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1338, "name": "address", "nodeType": "ElementaryTypeName", "src": "11608:7:3", "typeDescriptions": {}}}, "id": 1341, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "11608:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "11591:27:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1348, "nodeType": "IfStatement", "src": "11587:96:3", "trueBody": {"id": 1347, "nodeType": "Block", "src": "11620:63:3", "statements": [{"errorCall": {"arguments": [{"id": 1344, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1320, "src": "11664:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1343, "name": "ERC721NonexistentToken", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1752, "src": "11641:22:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_uint256_$returns$__$", "typeString": "function (uint256) pure"}}, "id": 1345, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "11641:31:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1346, "nodeType": "RevertStatement", "src": "11634:38:3"}]}}]}, "documentation": {"id": 1318, "nodeType": "StructuredDocumentation", "src": "11142:315:3", "text": " @dev Destroys `tokenId`.\n The approval is cleared when the token is burned.\n This is an internal function that does not check if the sender is authorized to operate on the token.\n Requirements:\n - `tokenId` must exist.\n Emits a {Transfer} event."}, "id": 1350, "implemented": true, "kind": "function", "modifiers": [], "name": "_burn", "nameLocation": "11471:5:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1321, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1320, "mutability": "mutable", "name": "tokenId", "nameLocation": "11485:7:3", "nodeType": "VariableDeclaration", "scope": 1350, "src": "11477:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1319, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11477:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "11476:17:3"}, "returnParameters": {"id": 1322, "nodeType": "ParameterList", "parameters": [], "src": "11503:0:3"}, "scope": 1669, "src": "11462:227:3", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal"}, {"body": {"id": 1409, "nodeType": "Block", "src": "12084:389:3", "statements": [{"condition": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1365, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1360, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1355, "src": "12098:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1363, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12112:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1362, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "12104:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1361, "name": "address", "nodeType": "ElementaryTypeName", "src": "12104:7:3", "typeDescriptions": {}}}, "id": 1364, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "12104:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "12098:16:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1374, "nodeType": "IfStatement", "src": "12094:87:3", "trueBody": {"id": 1373, "nodeType": "Block", "src": "12116:65:3", "statements": [{"errorCall": {"arguments": [{"arguments": [{"hexValue": "30", "id": 1369, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12167:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1368, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "12159:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1367, "name": "address", "nodeType": "ElementaryTypeName", "src": "12159:7:3", "typeDescriptions": {}}}, "id": 1370, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "12159:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}], "id": 1366, "name": "ERC721InvalidReceiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1771, "src": "12137:21:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_address_$returns$__$", "typeString": "function (address) pure"}}, "id": 1371, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "12137:33:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1372, "nodeType": "RevertStatement", "src": "12130:40:3"}]}}, {"assignments": [1376], "declarations": [{"constant": false, "id": 1376, "mutability": "mutable", "name": "previousOwner", "nameLocation": "12198:13:3", "nodeType": "VariableDeclaration", "scope": 1409, "src": "12190:21:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1375, "name": "address", "nodeType": "ElementaryTypeName", "src": "12190:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "id": 1385, "initialValue": {"arguments": [{"id": 1378, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1355, "src": "12222:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1379, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1357, "src": "12226:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"arguments": [{"hexValue": "30", "id": 1382, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12243:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", 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"typeString": "address"}}, "src": "12362:21:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1407, "nodeType": "IfStatement", "src": "12358:109:3", "trueBody": {"id": 1406, "nodeType": "Block", "src": "12385:82:3", "statements": [{"errorCall": {"arguments": [{"id": 1401, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1353, "src": "12427:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1402, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1357, "src": "12433:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"id": 1403, "name": "previousOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1376, "src": "12442:13:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}, {"typeIdentifier": "t_address", "typeString": "address"}], "id": 1400, "name": "ERC721IncorrectOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1761, "src": "12406:20:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_address_$_t_uint256_$_t_address_$returns$__$", "typeString": "function (address,uint256,address) pure"}}, "id": 1404, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "12406:50:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1405, "nodeType": "RevertStatement", "src": "12399:57:3"}]}}, "id": 1408, "nodeType": "IfStatement", "src": "12256:211:3", "trueBody": {"id": 1396, "nodeType": "Block", "src": "12289:63:3", "statements": [{"errorCall": {"arguments": [{"id": 1393, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1357, "src": "12333:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1392, "name": "ERC721NonexistentToken", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1752, "src": "12310:22:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_uint256_$returns$__$", "typeString": "function (uint256) pure"}}, "id": 1394, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "12310:31:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1395, "nodeType": "RevertStatement", "src": "12303:38:3"}]}}]}, "documentation": {"id": 1351, "nodeType": "StructuredDocumentation", "src": "11695:313:3", "text": " @dev Transfers `tokenId` from `from` to `to`.\n  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.\n Requirements:\n - `to` cannot be the zero address.\n - `tokenId` token must be owned by `from`.\n Emits a {Transfer} event."}, "id": 1410, "implemented": true, "kind": "function", "modifiers": [], "name": "_transfer", "nameLocation": "12022:9:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1358, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1353, "mutability": "mutable", "name": "from", "nameLocation": "12040:4:3", "nodeType": "VariableDeclaration", "scope": 1410, "src": "12032:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1352, "name": "address", "nodeType": "ElementaryTypeName", "src": "12032:7:3", 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{"id": 1356, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "12058:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "12031:43:3"}, "returnParameters": {"id": 1359, "nodeType": "ParameterList", "parameters": [], "src": "12084:0:3"}, "scope": 1669, "src": "12013:460:3", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal"}, {"body": {"id": 1427, "nodeType": "Block", "src": "13481:53:3", "statements": [{"expression": {"arguments": [{"id": 1421, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1413, "src": "13505:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1422, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1415, "src": "13511:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1423, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1417, "src": "13515:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"hexValue": "", "id": 1424, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "13524:2:3", "typeDescriptions": {"typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\""}, "value": ""}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}, {"typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\""}], "id": 1420, "name": "_safeTransfer", "nodeType": "Identifier", "overloadedDeclarations": [1428, 1454], "referencedDeclaration": 1454, "src": "13491:13:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,address,uint256,bytes memory)"}}, "id": 1425, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "13491:36:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1426, "nodeType": "ExpressionStatement", "src": "13491:36:3"}]}, "documentation": {"id": 1411, "nodeType": "StructuredDocumentation", "src": "12479:922:3", "text": " @dev Safely transfers `tokenId` token from `from` to `to`, checking that contract recipients\n are aware of the ERC721 standard to prevent tokens from being forever locked.\n `data` is additional data, it has no specified format and it is sent in call to `to`.\n This internal function is like {safeTransferFrom} in the sense that it invokes\n {IERC721Receiver-onERC721Received} on the receiver, and can be used to e.g.\n implement alternative mechanisms to perform token transfer, such as signature-based.\n Requirements:\n - `tokenId` token must exist and be owned by `from`.\n - `to` cannot be the zero address.\n - `from` cannot be the zero address.\n - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n Emits a {Transfer} event."}, "id": 1428, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeTransfer", "nameLocation": "13415:13:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1418, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1413, "mutability": "mutable", "name": "from", "nameLocation": "13437:4:3", "nodeType": "VariableDeclaration", "scope": 1428, "src": "13429:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1412, "name": "address", "nodeType": "ElementaryTypeName", "src": "13429:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1415, "mutability": "mutable", "name": "to", "nameLocation": "13451:2:3", "nodeType": "VariableDeclaration", "scope": 1428, "src": "13443:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1414, "name": "address", "nodeType": "ElementaryTypeName", "src": "13443:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1417, "mutability": "mutable", "name": "tokenId", "nameLocation": "13463:7:3", "nodeType": "VariableDeclaration", "scope": 1428, "src": "13455:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1416, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "13455:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "13428:43:3"}, "returnParameters": {"id": 1419, "nodeType": "ParameterList", "parameters": [], "src": "13481:0:3"}, "scope": 1669, "src": "13406:128:3", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal"}, {"body": {"id": 1453, "nodeType": "Block", "src": "13873:102:3", "statements": [{"expression": {"arguments": [{"id": 1441, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1431, "src": "13893:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1442, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1433, "src": "13899:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1443, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1435, "src": "13903:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1440, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1410, "src": "13883:9:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)"}}, "id": 1444, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "13883:28:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1445, "nodeType": "ExpressionStatement", "src": "13883:28:3"}, {"expression": {"arguments": [{"id": 1447, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1431, "src": "13944:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1448, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1433, "src": "13950:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1449, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1435, "src": "13954:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"id": 1450, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1437, "src": "13963:4:3", "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}, {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}], "id": 1446, "name": "_checkOnERC721Received", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1668, "src": "13921:22:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,address,uint256,bytes memory)"}}, "id": 1451, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "13921:47:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1452, "nodeType": "ExpressionStatement", "src": "13921:47:3"}]}, "documentation": {"id": 1429, "nodeType": "StructuredDocumentation", "src": "13540:226:3", "text": " @dev Same as {xref-ERC721-_safeTransfer-address-address-uint256-}[`_safeTransfer`], with an additional `data` parameter which is\n forwarded in {IERC721Receiver-onERC721Received} to contract recipients."}, "id": 1454, "implemented": true, "kind": "function", "modifiers": [], "name": "_safeTransfer", "nameLocation": "13780:13:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1438, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1431, "mutability": "mutable", "name": "from", "nameLocation": "13802:4:3", "nodeType": "VariableDeclaration", "scope": 1454, "src": "13794:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1430, "name": "address", "nodeType": "ElementaryTypeName", "src": "13794:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1433, "mutability": "mutable", "name": "to", "nameLocation": "13816:2:3", "nodeType": "VariableDeclaration", "scope": 1454, "src": "13808:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1432, "name": "address", "nodeType": "ElementaryTypeName", "src": "13808:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1435, "mutability": "mutable", "name": "tokenId", "nameLocation": "13828:7:3", "nodeType": "VariableDeclaration", "scope": 1454, "src": "13820:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1434, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "13820:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1437, "mutability": "mutable", "name": "data", "nameLocation": "13850:4:3", "nodeType": "VariableDeclaration", "scope": 1454, "src": "13837:17:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes"}, "typeName": {"id": 1436, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "13837:5:3", "typeDescriptions": {"typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes"}}, "visibility": "internal"}], "src": "13793:62:3"}, "returnParameters": {"id": 1439, "nodeType": "ParameterList", "parameters": [], "src": "13873:0:3"}, "scope": 1669, "src": "13771:204:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal"}, {"body": {"id": 1471, "nodeType": "Block", "src": "14488:50:3", "statements": [{"expression": {"arguments": [{"id": 1465, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1457, "src": "14507:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1466, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1459, "src": "14511:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"id": 1467, "name": "auth", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1461, "src": "14520:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"hexValue": "74727565", "id": 1468, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "14526:4:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}, "value": "true"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_bool", "typeString": "bool"}], "id": 1464, "name": "_approve", "nodeType": "Identifier", "overloadedDeclarations": [1472, 1538], "referencedDeclaration": 1538, "src": "14498:8:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$_t_address_$_t_bool_$returns$__$", "typeString": "function (address,uint256,address,bool)"}}, "id": 1469, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "14498:33:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1470, "nodeType": "ExpressionStatement", "src": "14498:33:3"}]}, "documentation": {"id": 1455, "nodeType": "StructuredDocumentation", "src": "13981:432:3", "text": " @dev Approve `to` to operate on `tokenId`\n The `auth` argument is optional. If the value passed is non 0, then this function will check that `auth` is\n either the owner of the token, or approved to operate on all tokens held by this owner.\n Emits an {Approval} event.\n Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument."}, "id": 1472, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nameLocation": "14427:8:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1462, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1457, "mutability": "mutable", "name": "to", "nameLocation": "14444:2:3", "nodeType": "VariableDeclaration", "scope": 1472, "src": "14436:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1456, "name": "address", "nodeType": "ElementaryTypeName", "src": "14436:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1459, "mutability": "mutable", "name": "tokenId", "nameLocation": "14456:7:3", "nodeType": "VariableDeclaration", "scope": 1472, "src": "14448:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1458, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "14448:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1461, "mutability": "mutable", "name": "auth", "nameLocation": "14473:4:3", "nodeType": "VariableDeclaration", "scope": 1472, "src": "14465:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1460, "name": "address", "nodeType": "ElementaryTypeName", "src": "14465:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "14435:43:3"}, "returnParameters": {"id": 1463, "nodeType": "ParameterList", "parameters": [], "src": "14488:0:3"}, "scope": 1669, "src": "14418:120:3", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal"}, {"body": {"id": 1537, "nodeType": "Block", "src": "14814:568:3", "statements": [{"condition": {"commonType": {"typeIdentifier": "t_bool", "typeString": "bool"}, "id": 1491, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1484, "name": "emitEvent", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1481, "src": "14880:9:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1490, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1485, "name": "auth", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1479, "src": "14893:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1488, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14909:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1487, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "14901:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1486, "name": "address", "nodeType": "ElementaryTypeName", "src": "14901:7:3", "typeDescriptions": {}}}, "id": 1489, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "14901:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "14893:18:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "src": "14880:31:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1530, "nodeType": "IfStatement", "src": "14876:460:3", "trueBody": {"id": 1529, "nodeType": "Block", "src": "14913:423:3", "statements": [{"assignments": [1493], "declarations": [{"constant": false, "id": 1493, "mutability": "mutable", "name": "owner", "nameLocation": "14935:5:3", "nodeType": "VariableDeclaration", "scope": 1529, "src": "14927:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1492, "name": "address", "nodeType": "ElementaryTypeName", "src": "14927:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "id": 1497, "initialValue": {"arguments": [{"id": 1495, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1477, "src": "14957:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1494, "name": "_requireOwned", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1604, "src": "14943:13:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)"}}, "id": 1496, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "14943:22:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "VariableDeclarationStatement", "src": "14927:38:3"}, {"condition": {"commonType": {"typeIdentifier": "t_bool", "typeString": "bool"}, "id": 1513, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"commonType": {"typeIdentifier": "t_bool", "typeString": "bool"}, "id": 1507, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1503, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1498, "name": "auth", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1479, "src": "15093:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1501, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "15109:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1500, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "15101:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1499, "name": "address", "nodeType": "ElementaryTypeName", "src": "15101:7:3", "typeDescriptions": {}}}, "id": 1502, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "15101:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "15093:18:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1506, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1504, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1493, "src": "15115:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"id": 1505, "name": "auth", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1479, "src": "15124:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "15115:13:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "src": "15093:35:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": {"id": 1512, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "15132:30:3", "subExpression": {"arguments": [{"id": 1509, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1493, "src": "15150:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1510, "name": "auth", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1479, "src": "15157:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}], "id": 1508, "name": "isApprovedForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 931, "src": "15133:16:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$_t_address_$_t_address_$returns$_t_bool_$", "typeString": "function (address,address) view returns (bool)"}}, "id": 1511, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "15133:29:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "src": "15093:69:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1519, "nodeType": "IfStatement", "src": "15089:142:3", "trueBody": {"id": 1518, "nodeType": "Block", "src": "15164:67:3", "statements": [{"errorCall": {"arguments": [{"id": 1515, "name": "auth", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1479, "src": "15211:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}], "id": 1514, "name": "ERC721InvalidApprover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1783, "src": "15189:21:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_address_$returns$__$", "typeString": "function (address) pure"}}, "id": 1516, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "15189:27:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1517, "nodeType": "RevertStatement", "src": "15182:34:3"}]}}, {"condition": {"id": 1520, "name": "emitEvent", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1481, "src": "15249:9:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1528, "nodeType": "IfStatement", "src": "15245:81:3", "trueBody": {"id": 1527, "nodeType": "Block", "src": "15260:66:3", "statements": [{"eventCall": {"arguments": [{"id": 1522, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1493, "src": "15292:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1523, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1475, "src": "15299:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1524, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1477, "src": "15303:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1521, "name": "Approval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1861, "src": "15283:8:3", "typeDescriptions": {"typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)"}}, "id": 1525, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "15283:28:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1526, "nodeType": "EmitStatement", "src": "15278:33:3"}]}}]}}, {"expression": {"id": 1535, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": {"baseExpression": {"id": 1531, "name": "_tokenApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 707, "src": "15346:15:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_address_$", "typeString": "mapping(uint256 => address)"}}, "id": 1533, "indexExpression": {"id": 1532, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1477, "src": "15362:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "15346:24:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "Assignment", "operator": "=", "rightHandSide": {"id": 1534, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1475, "src": "15373:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "15346:29:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "id": 1536, "nodeType": "ExpressionStatement", "src": "15346:29:3"}]}, "documentation": {"id": 1473, "nodeType": "StructuredDocumentation", "src": "14544:171:3", "text": " @dev Variant of `_approve` with an optional flag to enable or disable the {Approval} event. The event is not\n emitted in the context of transfers."}, "id": 1538, "implemented": true, "kind": "function", "modifiers": [], "name": "_approve", "nameLocation": "14729:8:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1482, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1475, "mutability": "mutable", "name": "to", "nameLocation": "14746:2:3", "nodeType": "VariableDeclaration", "scope": 1538, "src": "14738:10:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1474, "name": "address", "nodeType": "ElementaryTypeName", "src": "14738:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1477, "mutability": "mutable", "name": "tokenId", "nameLocation": "14758:7:3", "nodeType": "VariableDeclaration", "scope": 1538, "src": "14750:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1476, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "14750:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1479, "mutability": "mutable", "name": "auth", "nameLocation": "14775:4:3", "nodeType": "VariableDeclaration", "scope": 1538, "src": "14767:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1478, "name": "address", "nodeType": "ElementaryTypeName", "src": "14767:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1481, "mutability": "mutable", "name": "emitEvent", "nameLocation": "14786:9:3", "nodeType": "VariableDeclaration", "scope": 1538, "src": "14781:14:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}, "typeName": {"id": 1480, "name": "bool", "nodeType": "ElementaryTypeName", "src": "14781:4:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "visibility": "internal"}], "src": "14737:59:3"}, "returnParameters": {"id": 1483, "nodeType": "ParameterList", "parameters": [], "src": "14814:0:3"}, "scope": 1669, "src": "14720:662:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal"}, {"body": {"id": 1574, "nodeType": "Block", "src": "15684:219:3", "statements": [{"condition": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1553, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1548, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1543, "src": "15698:8:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1551, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "15718:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1550, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "15710:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1549, "name": "address", "nodeType": "ElementaryTypeName", "src": "15710:7:3", "typeDescriptions": {}}}, "id": 1552, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "15710:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "15698:22:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1559, "nodeType": "IfStatement", "src": "15694:91:3", "trueBody": {"id": 1558, "nodeType": "Block", "src": "15722:63:3", "statements": [{"errorCall": {"arguments": [{"id": 1555, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1543, "src": "15765:8:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}], "id": 1554, "name": "ERC721InvalidOperator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1788, "src": "15743:21:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_address_$returns$__$", "typeString": "function (address) pure"}}, "id": 1556, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "15743:31:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1557, "nodeType": "RevertStatement", "src": "15736:38:3"}]}}, {"expression": {"id": 1566, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": {"baseExpression": {"baseExpression": {"id": 1560, "name": "_operatorApprovals", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 713, "src": "15794:18:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(address => mapping(address => bool))"}}, "id": 1563, "indexExpression": {"id": 1561, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1541, "src": "15813:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "15794:25:3", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)"}}, "id": 1564, "indexExpression": {"id": 1562, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1543, "src": "15820:8:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "15794:35:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "nodeType": "Assignment", "operator": "=", "rightHandSide": {"id": 1565, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1545, "src": "15832:8:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "src": "15794:46:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1567, "nodeType": "ExpressionStatement", "src": "15794:46:3"}, {"eventCall": {"arguments": [{"id": 1569, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1541, "src": "15870:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1570, "name": "operator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1543, "src": "15877:8:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1571, "name": "approved", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1545, "src": "15887:8:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_bool", "typeString": "bool"}], "id": 1568, "name": "ApprovalForAll", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1870, "src": "15855:14:3", "typeDescriptions": {"typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_bool_$returns$__$", "typeString": "function (address,address,bool)"}}, "id": 1572, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "15855:41:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1573, "nodeType": "EmitStatement", "src": "15850:46:3"}]}, "documentation": {"id": 1539, "nodeType": "StructuredDocumentation", "src": "15388:198:3", "text": " @dev Approve `operator` to operate on all of `owner` tokens\n Requirements:\n - operator can't be the address zero.\n Emits an {ApprovalForAll} event."}, "id": 1575, "implemented": true, "kind": "function", "modifiers": [], "name": "_setApprovalForAll", "nameLocation": "15600:18:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1546, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1541, "mutability": "mutable", "name": "owner", "nameLocation": "15627:5:3", "nodeType": "VariableDeclaration", "scope": 1575, "src": "15619:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1540, "name": "address", "nodeType": "ElementaryTypeName", "src": "15619:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1543, "mutability": "mutable", "name": "operator", "nameLocation": "15642:8:3", "nodeType": "VariableDeclaration", "scope": 1575, "src": "15634:16:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1542, "name": "address", "nodeType": "ElementaryTypeName", "src": "15634:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1545, "mutability": "mutable", "name": "approved", "nameLocation": "15657:8:3", "nodeType": "VariableDeclaration", "scope": 1575, "src": "15652:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}, "typeName": {"id": 1544, "name": "bool", "nodeType": "ElementaryTypeName", "src": "15652:4:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "visibility": "internal"}], "src": "15618:48:3"}, "returnParameters": {"id": 1547, "nodeType": "ParameterList", "parameters": [], "src": "15684:0:3"}, "scope": 1669, "src": "15591:312:3", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal"}, {"body": {"id": 1603, "nodeType": "Block", "src": "16210:169:3", "statements": [{"assignments": [1584], "declarations": [{"constant": false, "id": 1584, "mutability": "mutable", "name": "owner", "nameLocation": "16228:5:3", "nodeType": "VariableDeclaration", "scope": 1603, "src": "16220:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1583, "name": "address", "nodeType": "ElementaryTypeName", "src": "16220:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "id": 1588, "initialValue": {"arguments": [{"id": 1586, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1578, "src": "16245:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1585, "name": "_ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1034, "src": "16236:8:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)"}}, "id": 1587, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "16236:17:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "VariableDeclarationStatement", "src": "16220:33:3"}, {"condition": {"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 1594, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1589, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1584, "src": "16267:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": {"arguments": [{"hexValue": "30", "id": 1592, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "16284:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 1591, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "16276:7:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 1590, "name": "address", "nodeType": "ElementaryTypeName", "src": "16276:7:3", "typeDescriptions": {}}}, "id": 1593, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "16276:10:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "16267:19:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1600, "nodeType": "IfStatement", "src": "16263:88:3", "trueBody": {"id": 1599, "nodeType": "Block", "src": "16288:63:3", "statements": [{"errorCall": {"arguments": [{"id": 1596, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1578, "src": "16332:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 1595, "name": "ERC721NonexistentToken", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1752, "src": "16309:22:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_uint256_$returns$__$", "typeString": "function (uint256) pure"}}, "id": 1597, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "16309:31:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1598, "nodeType": "RevertStatement", "src": "16302:38:3"}]}}, {"expression": {"id": 1601, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1584, "src": "16367:5:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "functionReturnParameters": 1582, "id": 1602, "nodeType": "Return", "src": "16360:12:3"}]}, "documentation": {"id": 1576, "nodeType": "StructuredDocumentation", "src": "15909:224:3", "text": " @dev Reverts if the `tokenId` doesn't have a current owner (it hasn't been minted, or it has been burned).\n Returns the owner.\n Overrides to ownership logic should be done to {_ownerOf}."}, "id": 1604, "implemented": true, "kind": "function", "modifiers": [], "name": "_requireOwned", "nameLocation": "16147:13:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1579, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1578, "mutability": "mutable", "name": "tokenId", "nameLocation": "16169:7:3", "nodeType": "VariableDeclaration", "scope": 1604, "src": "16161:15:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1577, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "16161:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "16160:17:3"}, "returnParameters": {"id": 1582, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1581, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 1604, "src": "16201:7:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1580, "name": "address", "nodeType": "ElementaryTypeName", "src": "16201:7:3", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "16200:9:3"}, "scope": 1669, "src": "16138:241:3", "stateMutability": "view", "virtual": false, "visibility": "internal"}, {"body": {"id": 1667, "nodeType": "Block", "src": "17020:680:3", "statements": [{"condition": {"commonType": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "id": 1620, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"expression": {"expression": {"id": 1616, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1609, "src": "17034:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "id": 1617, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberLocation": "17037:4:3", "memberName": "code", "nodeType": "MemberAccess", "src": "17034:7:3", "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}}, "id": 1618, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberLocation": "17042:6:3", "memberName": "length", "nodeType": "MemberAccess", "src": "17034:14:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": {"hexValue": "30", "id": 1619, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "17051:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}, "src": "17034:18:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1666, "nodeType": "IfStatement", "src": "17030:664:3", "trueBody": {"id": 1665, "nodeType": "Block", "src": "17054:640:3", "statements": [{"clauses": [{"block": {"id": 1645, "nodeType": "Block", "src": "17168:162:3", "statements": [{"condition": {"commonType": {"typeIdentifier": "t_bytes4", "typeString": "bytes4"}, "id": 1638, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 1634, "name": "retval", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1632, "src": "17190:6:3", "typeDescriptions": {"typeIdentifier": "t_bytes4", "typeString": "bytes4"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"expression": {"expression": {"id": 1635, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1971, "src": "17200:15:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$1971_$", "typeString": "type(contract IERC721Receiver)"}}, "id": 1636, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberLocation": "17216:16:3", "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 1970, "src": "17200:32:3", "typeDescriptions": {"typeIdentifier": "t_function_declaration_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_calldata_ptr_$returns$_t_bytes4_$", "typeString": "function IERC721Receiver.onERC721Received(address,address,uint256,bytes calldata) returns (bytes4)"}}, "id": 1637, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberLocation": "17233:8:3", "memberName": "selector", "nodeType": "MemberAccess", "src": "17200:41:3", "typeDescriptions": {"typeIdentifier": "t_bytes4", "typeString": "bytes4"}}, "src": "17190:51:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 1644, "nodeType": "IfStatement", "src": "17186:130:3", "trueBody": {"id": 1643, "nodeType": "Block", "src": "17243:73:3", "statements": [{"errorCall": {"arguments": [{"id": 1640, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1609, "src": "17294:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}], "id": 1639, "name": "ERC721InvalidReceiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1771, "src": "17272:21:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_address_$returns$__$", "typeString": "function (address) pure"}}, "id": 1641, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "17272:25:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1642, "nodeType": "RevertStatement", "src": "17265:32:3"}]}}]}, "errorName": "", "id": 1646, "nodeType": "TryCatchClause", "parameters": {"id": 1633, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1632, "mutability": "mutable", "name": "retval", "nameLocation": "17160:6:3", "nodeType": "VariableDeclaration", "scope": 1646, "src": "17153:13:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_bytes4", "typeString": "bytes4"}, "typeName": {"id": 1631, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "17153:6:3", "typeDescriptions": {"typeIdentifier": "t_bytes4", "typeString": "bytes4"}}, "visibility": "internal"}], "src": "17152:15:3"}, "src": "17144:186:3"}, {"block": {"id": 1662, "nodeType": "Block", "src": "17359:325:3", "statements": [{"condition": {"commonType": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "id": 1653, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"expression": {"id": 1650, "name": "reason", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1648, "src": "17381:6:3", "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}}, "id": 1651, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberLocation": "17388:6:3", "memberName": "length", "nodeType": "MemberAccess", "src": "17381:13:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": {"hexValue": "30", "id": 1652, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "17398:1:3", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}, "src": "17381:18:3", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "falseBody": {"id": 1660, "nodeType": "Block", "src": "17480:190:3", "statements": [{"AST": {"nativeSrc": "17566:86:3", "nodeType": "YulBlock", "src": "17566:86:3", "statements": [{"expression": {"arguments": [{"arguments": [{"kind": "number", "nativeSrc": "17603:2:3", "nodeType": "YulLiteral", "src": "17603:2:3", "type": "", "value": "32"}, {"name": "reason", "nativeSrc": "17607:6:3", "nodeType": "YulIdentifier", "src": "17607:6:3"}], "functionName": {"name": "add", "nativeSrc": "17599:3:3", "nodeType": "YulIdentifier", "src": "17599:3:3"}, "nativeSrc": "17599:15:3", "nodeType": "YulFunctionCall", "src": "17599:15:3"}, {"arguments": [{"name": "reason", "nativeSrc": "17622:6:3", "nodeType": "YulIdentifier", "src": "17622:6:3"}], "functionName": {"name": "mload", "nativeSrc": "17616:5:3", "nodeType": "YulIdentifier", "src": "17616:5:3"}, "nativeSrc": "17616:13:3", "nodeType": "YulFunctionCall", "src": "17616:13:3"}], "functionName": {"name": "revert", "nativeSrc": "17592:6:3", "nodeType": "YulIdentifier", "src": "17592:6:3"}, "nativeSrc": "17592:38:3", "nodeType": "YulFunctionCall", "src": "17592:38:3"}, "nativeSrc": "17592:38:3", "nodeType": "YulExpressionStatement", "src": "17592:38:3"}]}, "documentation": "@solidity memory-safe-assembly", "evmVersion": "shanghai", "externalReferences": [{"declaration": 1648, "isOffset": false, "isSlot": false, "src": "17607:6:3", "valueSize": 1}, {"declaration": 1648, "isOffset": false, "isSlot": false, "src": "17622:6:3", "valueSize": 1}], "id": 1659, "nodeType": "InlineAssembly", "src": "17557:95:3"}]}, "id": 1661, "nodeType": "IfStatement", "src": "17377:293:3", "trueBody": {"id": 1658, "nodeType": "Block", "src": "17401:73:3", "statements": [{"errorCall": {"arguments": [{"id": 1655, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1609, "src": "17452:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}], "id": 1654, "name": "ERC721InvalidReceiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1771, "src": "17430:21:3", "typeDescriptions": {"typeIdentifier": "t_function_error_pure$_t_address_$returns$__$", "typeString": "function (address) pure"}}, "id": 1656, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "17430:25:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 1657, "nodeType": "RevertStatement", "src": "17423:32:3"}]}}]}, "errorName": "", "id": 1663, "nodeType": "TryCatchClause", "parameters": {"id": 1649, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1648, "mutability": "mutable", "name": "reason", "nameLocation": "17351:6:3", "nodeType": "VariableDeclaration", "scope": 1663, "src": "17338:19:3", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes"}, "typeName": {"id": 1647, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "17338:5:3", "typeDescriptions": {"typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes"}}, "visibility": "internal"}], "src": "17337:21:3"}, "src": "17331:353:3"}], "externalCall": {"arguments": [{"arguments": [], "expression": {"argumentTypes": [], "id": 1625, "name": "_msgSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1681, "src": "17109:10:3", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)"}}, "id": 1626, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "17109:12:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1627, "name": "from", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1607, "src": "17123:4:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 1628, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1611, "src": "17129:7:3", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, {"id": 1629, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1613, "src": "17138:4:3", "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}, {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}], "expression": {"arguments": [{"id": 1622, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1609, "src": "17088:2:3", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}], "id": 1621, "name": "IERC721Receiver", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1971, "src": "17072:15:3", "typeDescriptions": {"typeIdentifier": "t_type$_t_contract$_IERC721Receiver_$1971_$", "typeString": "type(contract IERC721Receiver)"}}, "id": 1623, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "17072:19:3", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_contract$_IERC721Receiver_$1971", "typeString": "contract IERC721Receiver"}}, "id": 1624, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberLocation": "17092:16:3", "memberName": "onERC721Received", "nodeType": "MemberAccess", "referencedDeclaration": 1970, "src": "17072:36:3", "typeDescriptions": {"typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$returns$_t_bytes4_$", "typeString": "function (address,address,uint256,bytes memory) external returns (bytes4)"}}, "id": 1630, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "17072:71:3", "tryCall": true, "typeDescriptions": {"typeIdentifier": "t_bytes4", "typeString": "bytes4"}}, "id": 1664, "nodeType": "TryStatement", "src": "17068:616:3"}]}}]}, "documentation": {"id": 1605, "nodeType": "StructuredDocumentation", "src": "16385:528:3", "text": " @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target address. This will revert if the\n recipient doesn't accept the token transfer. The call is not executed if the target address is not a contract.\n @param from address representing the previous owner of the given token ID\n @param to target address that will receive the tokens\n @param tokenId uint256 ID of the token to be transferred\n @param data bytes optional data to send along with the call"}, "id": 1668, "implemented": true, "kind": "function", "modifiers": [], "name": "_checkOnERC721Received", "nameLocation": "16927:22:3", "nodeType": "FunctionDefinition", "parameters": {"id": 1614, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1607, "mutability": "mutable", "name": "from", "nameLocation": "16958:4:3", "nodeType": "VariableDeclaration", "scope": 1668, "src": "16950:12:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1606, "name": "address", "nodeType": "ElementaryTypeName", "src": "16950:7:3", "stateMutability": "nonpayable", 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1771, 1778, 1783, 1788], "usedEvents": [1852, 1861, 1870]}], "src": "107:17596:3"}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol": {"AST": {"absolutePath": "lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol", "exportedSymbols": {"IERC165": [2290], "IERC721": [1953]}, "id": 1954, "license": "MIT", "nodeType": "SourceUnit", "nodes": [{"id": 1838, "literals": ["solidity", "^", "0.8", ".20"], "nodeType": "PragmaDirective", "src": "108:24:4"}, {"absolutePath": "lib/openzeppelin-contracts/contracts/utils/introspection/IERC165.sol", "file": "../../utils/introspection/IERC165.sol", "id": 1840, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 1954, "sourceUnit": 2291, "src": "134:62:4", "symbolAliases": [{"foreign": {"id": 1839, "name": "IERC165", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2290, "src": "142:7:4", "typeDescriptions": {}}, "nameLocation": "-1:-1:-1"}], "unitAlias": ""}, {"abstract": false, "baseContracts": [{"baseName": {"id": 1842, "name": "IERC165", "nameLocations": ["287:7:4"], "nodeType": "IdentifierPath", "referencedDeclaration": 2290, "src": "287:7:4"}, "id": 1843, "nodeType": "InheritanceSpecifier", "src": "287:7:4"}], "canonicalName": "IERC721", "contractDependencies": [], "contractKind": "interface", "documentation": {"id": 1841, "nodeType": "StructuredDocumentation", "src": "198:67:4", "text": " @dev Required interface of an ERC721 compliant contract."}, "fullyImplemented": false, "id": 1953, "linearizedBaseContracts": [1953, 2290], "name": "IERC721", "nameLocation": "276:7:4", "nodeType": "ContractDefinition", "nodes": [{"anonymous": false, "documentation": {"id": 1844, "nodeType": "StructuredDocumentation", "src": "301:88:4", "text": " @dev Emitted when `tokenId` token is transferred from `from` to `to`."}, "eventSelector": "ddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef", "id": 1852, "name": "Transfer", "nameLocation": "400:8:4", "nodeType": "EventDefinition", "parameters": {"id": 1851, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1846, "indexed": true, "mutability": "mutable", "name": "from", "nameLocation": "425:4:4", "nodeType": "VariableDeclaration", "scope": 1852, "src": "409:20:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1845, "name": "address", "nodeType": "ElementaryTypeName", "src": "409:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1848, "indexed": true, "mutability": "mutable", "name": "to", "nameLocation": "447:2:4", "nodeType": "VariableDeclaration", "scope": 1852, "src": "431:18:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1847, "name": "address", "nodeType": "ElementaryTypeName", "src": "431:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1850, "indexed": true, "mutability": "mutable", "name": "tokenId", "nameLocation": "467:7:4", "nodeType": "VariableDeclaration", "scope": 1852, "src": "451:23:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1849, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "451:7:4", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "408:67:4"}, "src": "394:82:4"}, {"anonymous": false, "documentation": {"id": 1853, "nodeType": "StructuredDocumentation", "src": "482:94:4", "text": " @dev Emitted when `owner` enables `approved` to manage the `tokenId` token."}, "eventSelector": "8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925", "id": 1861, "name": "Approval", "nameLocation": "587:8:4", "nodeType": "EventDefinition", "parameters": {"id": 1860, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1855, "indexed": true, "mutability": "mutable", "name": "owner", "nameLocation": "612:5:4", "nodeType": "VariableDeclaration", "scope": 1861, "src": "596:21:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1854, "name": "address", "nodeType": "ElementaryTypeName", "src": "596:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1857, "indexed": true, "mutability": "mutable", "name": "approved", "nameLocation": "635:8:4", "nodeType": "VariableDeclaration", "scope": 1861, "src": "619:24:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1856, "name": "address", "nodeType": "ElementaryTypeName", "src": "619:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1859, "indexed": true, "mutability": "mutable", "name": "tokenId", "nameLocation": "661:7:4", "nodeType": "VariableDeclaration", "scope": 1861, "src": "645:23:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1858, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "645:7:4", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "595:74:4"}, "src": "581:89:4"}, {"anonymous": false, "documentation": {"id": 1862, "nodeType": "StructuredDocumentation", "src": "676:117:4", "text": " @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets."}, "eventSelector": "17307eab39ab6107e8899845ad3d59bd9653f200f220920489ca2b5937696c31", "id": 1870, "name": "ApprovalForAll", "nameLocation": "804:14:4", "nodeType": "EventDefinition", "parameters": {"id": 1869, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1864, "indexed": true, "mutability": "mutable", "name": "owner", "nameLocation": "835:5:4", "nodeType": "VariableDeclaration", "scope": 1870, "src": "819:21:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1863, "name": "address", "nodeType": "ElementaryTypeName", "src": "819:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1866, "indexed": true, "mutability": "mutable", "name": "operator", "nameLocation": "858:8:4", "nodeType": "VariableDeclaration", "scope": 1870, "src": "842:24:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1865, "name": "address", "nodeType": "ElementaryTypeName", "src": "842:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1868, "indexed": false, "mutability": "mutable", "name": "approved", "nameLocation": "873:8:4", "nodeType": "VariableDeclaration", "scope": 1870, "src": "868:13:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}, "typeName": {"id": 1867, "name": "bool", "nodeType": "ElementaryTypeName", "src": "868:4:4", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "visibility": "internal"}], "src": "818:64:4"}, "src": "798:85:4"}, {"documentation": {"id": 1871, "nodeType": "StructuredDocumentation", "src": "889:76:4", "text": " @dev Returns the number of tokens in ``owner``'s account."}, "functionSelector": "70a08231", "id": 1878, "implemented": false, "kind": "function", "modifiers": [], "name": "balanceOf", "nameLocation": "979:9:4", "nodeType": "FunctionDefinition", "parameters": {"id": 1874, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1873, "mutability": "mutable", "name": "owner", "nameLocation": "997:5:4", "nodeType": "VariableDeclaration", "scope": 1878, "src": "989:13:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1872, "name": "address", "nodeType": "ElementaryTypeName", "src": "989:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "988:15:4"}, "returnParameters": {"id": 1877, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1876, "mutability": "mutable", "name": "balance", "nameLocation": "1035:7:4", "nodeType": "VariableDeclaration", "scope": 1878, "src": "1027:15:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1875, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1027:7:4", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "1026:17:4"}, "scope": 1953, "src": "970:74:4", "stateMutability": "view", "virtual": false, "visibility": "external"}, {"documentation": {"id": 1879, "nodeType": "StructuredDocumentation", "src": "1050:131:4", "text": " @dev Returns the owner of the `tokenId` token.\n Requirements:\n - `tokenId` must exist."}, "functionSelector": "6352211e", "id": 1886, "implemented": false, "kind": "function", "modifiers": [], "name": "ownerOf", "nameLocation": "1195:7:4", "nodeType": "FunctionDefinition", "parameters": {"id": 1882, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1881, "mutability": "mutable", "name": "tokenId", "nameLocation": "1211:7:4", "nodeType": "VariableDeclaration", "scope": 1886, "src": "1203:15:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1880, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1203:7:4", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "1202:17:4"}, "returnParameters": {"id": 1885, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1884, "mutability": "mutable", "name": "owner", "nameLocation": "1251:5:4", "nodeType": "VariableDeclaration", "scope": 1886, "src": "1243:13:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1883, "name": "address", "nodeType": "ElementaryTypeName", "src": "1243:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "1242:15:4"}, "scope": 1953, "src": "1186:72:4", "stateMutability": "view", "virtual": false, "visibility": "external"}, {"documentation": {"id": 1887, "nodeType": "StructuredDocumentation", "src": "1264:565:4", "text": " @dev Safely transfers `tokenId` token from `from` to `to`.\n Requirements:\n - `from` cannot be the zero address.\n - `to` cannot be the zero address.\n - `tokenId` token must exist and be owned by `from`.\n - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon\n   a safe transfer.\n Emits a {Transfer} event."}, "functionSelector": "b88d4fde", "id": 1898, "implemented": false, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nameLocation": "1843:16:4", "nodeType": "FunctionDefinition", "parameters": {"id": 1896, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1889, "mutability": "mutable", "name": "from", "nameLocation": "1868:4:4", "nodeType": "VariableDeclaration", "scope": 1898, "src": "1860:12:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1888, "name": "address", "nodeType": "ElementaryTypeName", "src": "1860:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1891, "mutability": "mutable", "name": "to", "nameLocation": "1882:2:4", "nodeType": "VariableDeclaration", "scope": 1898, "src": "1874:10:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1890, "name": "address", "nodeType": "ElementaryTypeName", "src": "1874:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1893, "mutability": "mutable", "name": "tokenId", "nameLocation": "1894:7:4", "nodeType": "VariableDeclaration", "scope": 1898, "src": "1886:15:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1892, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1886:7:4", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1895, "mutability": "mutable", "name": "data", "nameLocation": "1918:4:4", "nodeType": "VariableDeclaration", "scope": 1898, "src": "1903:19:4", "stateVariable": false, "storageLocation": "calldata", "typeDescriptions": {"typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes"}, "typeName": {"id": 1894, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "1903:5:4", "typeDescriptions": {"typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes"}}, "visibility": "internal"}], "src": "1859:64:4"}, "returnParameters": {"id": 1897, "nodeType": "ParameterList", "parameters": [], "src": "1932:0:4"}, "scope": 1953, "src": "1834:99:4", "stateMutability": "nonpayable", "virtual": false, "visibility": "external"}, {"documentation": {"id": 1899, "nodeType": "StructuredDocumentation", "src": "1939:705:4", "text": " @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n are aware of the ERC721 protocol to prevent tokens from being forever locked.\n Requirements:\n - `from` cannot be the zero address.\n - `to` cannot be the zero address.\n - `tokenId` token must exist and be owned by `from`.\n - If the caller is not `from`, it must have been allowed to move this token by either {approve} or\n   {setApprovalForAll}.\n - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon\n   a safe transfer.\n Emits a {Transfer} event."}, "functionSelector": "42842e0e", "id": 1908, "implemented": false, "kind": "function", "modifiers": [], "name": "safeTransferFrom", "nameLocation": "2658:16:4", "nodeType": "FunctionDefinition", "parameters": {"id": 1906, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1901, "mutability": "mutable", "name": "from", "nameLocation": "2683:4:4", "nodeType": "VariableDeclaration", "scope": 1908, "src": "2675:12:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1900, "name": "address", "nodeType": "ElementaryTypeName", "src": "2675:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1903, "mutability": "mutable", "name": "to", "nameLocation": "2697:2:4", "nodeType": "VariableDeclaration", "scope": 1908, "src": "2689:10:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1902, "name": "address", "nodeType": "ElementaryTypeName", "src": "2689:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1905, "mutability": "mutable", "name": "tokenId", "nameLocation": "2709:7:4", "nodeType": "VariableDeclaration", "scope": 1908, "src": "2701:15:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1904, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2701:7:4", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "2674:43:4"}, "returnParameters": {"id": 1907, "nodeType": "ParameterList", "parameters": [], "src": "2726:0:4"}, "scope": 1953, "src": "2649:78:4", "stateMutability": "nonpayable", "virtual": false, "visibility": "external"}, {"documentation": {"id": 1909, "nodeType": "StructuredDocumentation", "src": "2733:732:4", "text": " @dev Transfers `tokenId` token from `from` to `to`.\n WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721\n or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must\n understand this adds an external call which potentially creates a reentrancy vulnerability.\n Requirements:\n - `from` cannot be the zero address.\n - `to` cannot be the zero address.\n - `tokenId` token must be owned by `from`.\n - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n Emits a {Transfer} event."}, "functionSelector": "23b872dd", "id": 1918, "implemented": false, "kind": "function", "modifiers": [], "name": "transferFrom", "nameLocation": "3479:12:4", "nodeType": "FunctionDefinition", "parameters": {"id": 1916, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1911, "mutability": "mutable", "name": "from", "nameLocation": "3500:4:4", "nodeType": "VariableDeclaration", "scope": 1918, "src": "3492:12:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1910, "name": "address", "nodeType": "ElementaryTypeName", "src": "3492:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1913, "mutability": "mutable", "name": "to", "nameLocation": "3514:2:4", "nodeType": "VariableDeclaration", "scope": 1918, "src": "3506:10:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1912, "name": "address", "nodeType": "ElementaryTypeName", "src": "3506:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1915, "mutability": "mutable", "name": "tokenId", "nameLocation": "3526:7:4", "nodeType": "VariableDeclaration", "scope": 1918, "src": "3518:15:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1914, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3518:7:4", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "3491:43:4"}, "returnParameters": {"id": 1917, "nodeType": "ParameterList", "parameters": [], "src": "3543:0:4"}, "scope": 1953, "src": "3470:74:4", "stateMutability": "nonpayable", "virtual": false, "visibility": "external"}, {"documentation": {"id": 1919, "nodeType": "StructuredDocumentation", "src": "3550:452:4", "text": " @dev Gives permission to `to` to transfer `tokenId` token to another account.\n The approval is cleared when the token is transferred.\n Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n Requirements:\n - The caller must own the token or be an approved operator.\n - `tokenId` must exist.\n Emits an {Approval} event."}, "functionSelector": "095ea7b3", "id": 1926, "implemented": false, "kind": "function", "modifiers": [], "name": "approve", "nameLocation": "4016:7:4", "nodeType": "FunctionDefinition", "parameters": {"id": 1924, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1921, "mutability": "mutable", "name": "to", "nameLocation": "4032:2:4", "nodeType": "VariableDeclaration", "scope": 1926, "src": "4024:10:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1920, "name": "address", "nodeType": "ElementaryTypeName", "src": "4024:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1923, "mutability": "mutable", "name": "tokenId", "nameLocation": "4044:7:4", "nodeType": "VariableDeclaration", "scope": 1926, "src": "4036:15:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1922, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4036:7:4", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "4023:29:4"}, "returnParameters": {"id": 1925, "nodeType": "ParameterList", "parameters": [], "src": "4061:0:4"}, "scope": 1953, "src": "4007:55:4", "stateMutability": "nonpayable", "virtual": false, "visibility": "external"}, {"documentation": {"id": 1927, "nodeType": "StructuredDocumentation", "src": "4068:315:4", "text": " @dev Approve or remove `operator` as an operator for the caller.\n Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n Requirements:\n - The `operator` cannot be the address zero.\n Emits an {ApprovalForAll} event."}, "functionSelector": "a22cb465", "id": 1934, "implemented": false, "kind": "function", "modifiers": [], "name": "setApprovalForAll", "nameLocation": "4397:17:4", "nodeType": "FunctionDefinition", "parameters": {"id": 1932, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1929, "mutability": "mutable", "name": "operator", "nameLocation": "4423:8:4", "nodeType": "VariableDeclaration", "scope": 1934, "src": "4415:16:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1928, "name": "address", "nodeType": "ElementaryTypeName", "src": "4415:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1931, "mutability": "mutable", "name": "approved", "nameLocation": "4438:8:4", "nodeType": "VariableDeclaration", "scope": 1934, "src": "4433:13:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}, "typeName": {"id": 1930, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4433:4:4", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "visibility": "internal"}], "src": "4414:33:4"}, "returnParameters": {"id": 1933, "nodeType": "ParameterList", "parameters": [], "src": "4456:0:4"}, "scope": 1953, "src": "4388:69:4", "stateMutability": "nonpayable", "virtual": false, "visibility": "external"}, {"documentation": {"id": 1935, "nodeType": "StructuredDocumentation", "src": "4463:139:4", "text": " @dev Returns the account approved for `tokenId` token.\n Requirements:\n - `tokenId` must exist."}, "functionSelector": "081812fc", "id": 1942, "implemented": false, "kind": "function", "modifiers": [], "name": "getApproved", "nameLocation": "4616:11:4", "nodeType": "FunctionDefinition", "parameters": {"id": 1938, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1937, "mutability": "mutable", "name": "tokenId", "nameLocation": "4636:7:4", "nodeType": "VariableDeclaration", "scope": 1942, "src": "4628:15:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1936, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4628:7:4", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "4627:17:4"}, "returnParameters": {"id": 1941, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1940, "mutability": "mutable", "name": "operator", "nameLocation": "4676:8:4", "nodeType": "VariableDeclaration", "scope": 1942, "src": "4668:16:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1939, "name": "address", "nodeType": "ElementaryTypeName", "src": "4668:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "4667:18:4"}, "scope": 1953, "src": "4607:79:4", "stateMutability": "view", "virtual": false, "visibility": "external"}, {"documentation": {"id": 1943, "nodeType": "StructuredDocumentation", "src": "4692:138:4", "text": " @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\n See {setApprovalForAll}"}, "functionSelector": "e985e9c5", "id": 1952, "implemented": false, "kind": "function", "modifiers": [], "name": "isApprovedForAll", "nameLocation": "4844:16:4", "nodeType": "FunctionDefinition", "parameters": {"id": 1948, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1945, "mutability": "mutable", "name": "owner", "nameLocation": "4869:5:4", "nodeType": "VariableDeclaration", "scope": 1952, "src": "4861:13:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1944, "name": "address", "nodeType": "ElementaryTypeName", "src": "4861:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1947, "mutability": "mutable", "name": "operator", "nameLocation": "4884:8:4", "nodeType": "VariableDeclaration", "scope": 1952, "src": "4876:16:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1946, "name": "address", "nodeType": "ElementaryTypeName", "src": "4876:7:4", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "4860:33:4"}, "returnParameters": {"id": 1951, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1950, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 1952, "src": "4917:4:4", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}, "typeName": {"id": 1949, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4917:4:4", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "visibility": "internal"}], "src": "4916:6:4"}, "scope": 1953, "src": "4835:88:4", "stateMutability": "view", "virtual": false, "visibility": "external"}], "scope": 1954, "src": "266:4659:4", "usedErrors": [], "usedEvents": [1852, 1861, 1870]}], "src": "108:4818:4"}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/token/ERC721/IERC721Receiver.sol": {"AST": {"absolutePath": "lib/openzeppelin-contracts/contracts/token/ERC721/IERC721Receiver.sol", "exportedSymbols": {"IERC721Receiver": [1971]}, "id": 1972, "license": "MIT", "nodeType": "SourceUnit", "nodes": [{"id": 1955, "literals": ["solidity", "^", "0.8", ".20"], "nodeType": "PragmaDirective", "src": "116:24:5"}, {"abstract": false, "baseContracts": [], "canonicalName": "IERC721Receiver", "contractDependencies": [], "contractKind": "interface", "documentation": {"id": 1956, "nodeType": "StructuredDocumentation", "src": "142:152:5", "text": " @title ERC721 token receiver interface\n @dev Interface for any contract that wants to support safeTransfers\n from ERC721 asset contracts."}, "fullyImplemented": false, "id": 1971, "linearizedBaseContracts": [1971], "name": "IERC721Receiver", "nameLocation": "305:15:5", "nodeType": "ContractDefinition", "nodes": [{"documentation": {"id": 1957, "nodeType": "StructuredDocumentation", "src": "327:500:5", "text": " @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}\n by `operator` from `from`, this function is called.\n It must return its Solidity selector to confirm the token transfer.\n If any other value is returned or the interface is not implemented by the recipient, the transfer will be\n reverted.\n The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`."}, "functionSelector": "150b7a02", "id": 1970, "implemented": false, "kind": "function", "modifiers": [], "name": "onERC721Received", "nameLocation": "841:16:5", "nodeType": "FunctionDefinition", "parameters": {"id": 1966, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1959, "mutability": "mutable", "name": "operator", "nameLocation": "875:8:5", "nodeType": "VariableDeclaration", "scope": 1970, "src": "867:16:5", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1958, "name": "address", "nodeType": "ElementaryTypeName", "src": "867:7:5", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1961, "mutability": "mutable", "name": "from", "nameLocation": "901:4:5", "nodeType": "VariableDeclaration", "scope": 1970, "src": "893:12:5", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 1960, "name": "address", "nodeType": "ElementaryTypeName", "src": "893:7:5", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 1963, "mutability": "mutable", "name": "tokenId", "nameLocation": "923:7:5", "nodeType": "VariableDeclaration", "scope": 1970, "src": "915:15:5", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1962, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "915:7:5", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 1965, "mutability": "mutable", "name": "data", "nameLocation": "955:4:5", "nodeType": "VariableDeclaration", "scope": 1970, "src": "940:19:5", "stateVariable": false, "storageLocation": "calldata", "typeDescriptions": {"typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes"}, "typeName": {"id": 1964, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "940:5:5", "typeDescriptions": {"typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes"}}, "visibility": "internal"}], "src": "857:108:5"}, "returnParameters": {"id": 1969, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1968, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 1970, "src": "984:6:5", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_bytes4", "typeString": "bytes4"}, "typeName": {"id": 1967, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "984:6:5", "typeDescriptions": {"typeIdentifier": "t_bytes4", "typeString": "bytes4"}}, "visibility": "internal"}], "src": "983:8:5"}, "scope": 1971, "src": "832:160:5", "stateMutability": "nonpayable", "virtual": false, "visibility": "external"}], "scope": 1972, "src": "295:699:5", "usedErrors": [], "usedEvents": []}], "src": "116:879:5"}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/token/ERC721/extensions/IERC721Metadata.sol": {"AST": {"absolutePath": "lib/openzeppelin-contracts/contracts/token/ERC721/extensions/IERC721Metadata.sol", "exportedSymbols": {"IERC721": [1953], "IERC721Metadata": [1999]}, "id": 2000, "license": "MIT", "nodeType": "SourceUnit", "nodes": [{"id": 1973, "literals": ["solidity", "^", "0.8", ".20"], "nodeType": "PragmaDirective", "src": "127:24:6"}, {"absolutePath": "lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol", "file": "../IERC721.sol", "id": 1975, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 2000, "sourceUnit": 1954, "src": "153:39:6", "symbolAliases": [{"foreign": {"id": 1974, "name": "IERC721", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1953, "src": "161:7:6", "typeDescriptions": {}}, "nameLocation": "-1:-1:-1"}], "unitAlias": ""}, {"abstract": false, "baseContracts": [{"baseName": {"id": 1977, "name": "IERC721", "nameLocations": ["357:7:6"], "nodeType": "IdentifierPath", "referencedDeclaration": 1953, "src": "357:7:6"}, "id": 1978, "nodeType": "InheritanceSpecifier", "src": "357:7:6"}], "canonicalName": "IERC721Metadata", "contractDependencies": [], "contractKind": "interface", "documentation": {"id": 1976, "nodeType": "StructuredDocumentation", "src": "194:133:6", "text": " @title ERC-721 Non-Fungible Token Standard, optional metadata extension\n @dev See https://eips.ethereum.org/EIPS/eip-721"}, "fullyImplemented": false, "id": 1999, "linearizedBaseContracts": [1999, 1953, 2290], "name": "IERC721Metadata", "nameLocation": "338:15:6", "nodeType": "ContractDefinition", "nodes": [{"documentation": {"id": 1979, "nodeType": "StructuredDocumentation", "src": "371:58:6", "text": " @dev Returns the token collection name."}, "functionSelector": "06fdde03", "id": 1984, "implemented": false, "kind": "function", "modifiers": [], "name": "name", "nameLocation": "443:4:6", "nodeType": "FunctionDefinition", "parameters": {"id": 1980, "nodeType": "ParameterList", "parameters": [], "src": "447:2:6"}, "returnParameters": {"id": 1983, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1982, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 1984, "src": "473:13:6", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": {"typeIdentifier": "t_string_memory_ptr", "typeString": "string"}, "typeName": {"id": 1981, "name": "string", "nodeType": "ElementaryTypeName", "src": "473:6:6", "typeDescriptions": {"typeIdentifier": "t_string_storage_ptr", "typeString": "string"}}, "visibility": "internal"}], "src": "472:15:6"}, "scope": 1999, "src": "434:54:6", "stateMutability": "view", "virtual": false, "visibility": "external"}, {"documentation": {"id": 1985, "nodeType": "StructuredDocumentation", "src": "494:60:6", "text": " @dev Returns the token collection symbol."}, "functionSelector": "95d89b41", "id": 1990, "implemented": false, "kind": "function", "modifiers": [], "name": "symbol", "nameLocation": "568:6:6", "nodeType": "FunctionDefinition", "parameters": {"id": 1986, "nodeType": "ParameterList", "parameters": [], "src": "574:2:6"}, "returnParameters": {"id": 1989, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1988, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 1990, "src": "600:13:6", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": {"typeIdentifier": "t_string_memory_ptr", "typeString": "string"}, "typeName": {"id": 1987, "name": "string", "nodeType": "ElementaryTypeName", "src": "600:6:6", "typeDescriptions": {"typeIdentifier": "t_string_storage_ptr", "typeString": "string"}}, "visibility": "internal"}], "src": "599:15:6"}, "scope": 1999, "src": "559:56:6", "stateMutability": "view", "virtual": false, "visibility": "external"}, {"documentation": {"id": 1991, "nodeType": "StructuredDocumentation", "src": "621:90:6", "text": " @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token."}, "functionSelector": "c87b56dd", "id": 1998, "implemented": false, "kind": "function", "modifiers": [], "name": "tokenURI", "nameLocation": "725:8:6", "nodeType": "FunctionDefinition", "parameters": {"id": 1994, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1993, "mutability": "mutable", "name": "tokenId", "nameLocation": "742:7:6", "nodeType": "VariableDeclaration", "scope": 1998, "src": "734:15:6", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 1992, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "734:7:6", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "733:17:6"}, "returnParameters": {"id": 1997, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 1996, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 1998, "src": "774:13:6", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": {"typeIdentifier": "t_string_memory_ptr", "typeString": "string"}, "typeName": {"id": 1995, "name": "string", "nodeType": "ElementaryTypeName", "src": "774:6:6", "typeDescriptions": {"typeIdentifier": "t_string_storage_ptr", "typeString": "string"}}, "visibility": "internal"}], "src": "773:15:6"}, "scope": 1999, "src": 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interfaces, which can then be\n queried by others ({ERC165Checker}).\n For an implementation, see {ERC165}."}, "fullyImplemented": false, "id": 2290, "linearizedBaseContracts": [2290], "name": "IERC165", "nameLocation": "431:7:10", "nodeType": "ContractDefinition", "nodes": [{"documentation": {"id": 2282, "nodeType": "StructuredDocumentation", "src": "445:340:10", "text": " @dev Returns true if this contract implements the interface defined by\n `interfaceId`. See the corresponding\n https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n to learn more about how these ids are created.\n This function call must use less than 30 000 gas."}, "functionSelector": "01ffc9a7", "id": 2289, "implemented": false, "kind": "function", "modifiers": [], "name": "supportsInterface", "nameLocation": "799:17:10", "nodeType": "FunctionDefinition", "parameters": {"id": 2285, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 2284, "mutability": "mutable", "name": "interfaceId", "nameLocation": "824:11:10", "nodeType": "VariableDeclaration", "scope": 2289, "src": "817:18:10", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_bytes4", "typeString": "bytes4"}, "typeName": {"id": 2283, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "817:6:10", "typeDescriptions": {"typeIdentifier": "t_bytes4", "typeString": "bytes4"}}, "visibility": "internal"}], "src": 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"typeString": "uint256"}}, "src": "7396:21:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "src": "7392:25:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "src": "7381:36:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "id": 2667, "nodeType": "ExpressionStatement", "src": "7381:36:11"}, {"expression": {"id": 2672, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": {"id": 2668, "name": "result", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2562, "src": "7851:6:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "Assignment", "operator": "=", "rightHandSide": {"commonType": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "id": 2671, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 2669, "name": "prod0", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2565, "src": "7860:5:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "BinaryOperation", "operator": "*", "rightExpression": {"id": 2670, "name": "inverse", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2612, "src": "7868:7:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "src": "7860:15:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "src": "7851:24:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "id": 2673, "nodeType": "ExpressionStatement", "src": "7851:24:11"}, {"expression": {"id": 2674, "name": "result", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2562, "src": "7896:6:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "functionReturnParameters": 2563, "id": 2675, "nodeType": "Return", "src": "7889:13:11"}]}]}, "documentation": {"id": 2553, "nodeType": "StructuredDocumentation", "src": "3485:313:11", "text": " @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or\n denominator == 0.\n @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by\n Uniswap Labs also under MIT license."}, "id": 2678, "implemented": true, "kind": "function", "modifiers": [], "name": "mulDiv", "nameLocation": "3812:6:11", "nodeType": "FunctionDefinition", "parameters": {"id": 2560, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 2555, "mutability": "mutable", "name": "x", "nameLocation": "3827:1:11", "nodeType": "VariableDeclaration", "scope": 2678, "src": "3819:9:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 2554, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3819:7:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 2557, "mutability": "mutable", 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rounding direction."}, "id": 2721, "implemented": true, "kind": "function", "modifiers": [], "name": "mulDiv", "nameLocation": "8060:6:11", "nodeType": "FunctionDefinition", "parameters": {"id": 2689, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 2681, "mutability": "mutable", "name": "x", "nameLocation": "8075:1:11", "nodeType": "VariableDeclaration", "scope": 2721, "src": "8067:9:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 2680, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8067:7:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 2683, "mutability": "mutable", "name": "y", "nameLocation": "8086:1:11", "nodeType": "VariableDeclaration", "scope": 2721, "src": "8078:9:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": 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If the number is not a perfect square, the value is rounded\n towards zero.\n Inspired by Henry S. Warren, Jr.'s \"Hacker's Delight\" (Chapter 11)."}, "id": 2833, "implemented": true, "kind": "function", "modifiers": [], "name": "sqrt", "nameLocation": "8596:4:11", "nodeType": "FunctionDefinition", "parameters": {"id": 2725, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 2724, "mutability": "mutable", "name": "a", "nameLocation": "8609:1:11", "nodeType": "VariableDeclaration", "scope": 2833, "src": "8601:9:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 2723, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "8601:7:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "8600:11:11"}, "returnParameters": {"id": 2728, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 2727, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": 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"t_uint256", "typeString": "uint256"}, "id": 3025, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"commonType": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "id": 3023, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"hexValue": "31", "id": 3021, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12038:1:11", "typeDescriptions": {"typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1"}, "value": "1"}, "nodeType": "BinaryOperation", "operator": "<<", "rightExpression": {"id": 3022, "name": "result", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3012, "src": "12043:6:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "src": "12038:11:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "BinaryOperation", "operator": "<", "rightExpression": {"id": 3024, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3003, "src": "12052:5:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "src": "12038:19:11", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "src": "12008:49:11", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "falseExpression": {"hexValue": "30", "id": 3028, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12064:1:11", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}, "id": 3029, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "Conditional", "src": "12008:57:11", "trueExpression": {"hexValue": "31", "id": 3027, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "12060:1:11", "typeDescriptions": {"typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1"}, "value": "1"}, "typeDescriptions": {"typeIdentifier": "t_uint8", "typeString": "uint8"}}], "id": 3030, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "12007:59:11", "typeDescriptions": {"typeIdentifier": "t_uint8", "typeString": "uint8"}}, "src": "11998:68:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "functionReturnParameters": 3010, "id": 3032, "nodeType": "Return", "src": "11991:75:11"}]}]}, "documentation": {"id": 3001, "nodeType": "StructuredDocumentation", "src": "11688:142:11", "text": " @dev Return the log in base 2, following the selected rounding direction, of a positive value.\n Returns 0 if given 0."}, "id": 3035, "implemented": true, "kind": "function", "modifiers": [], "name": "log2", "nameLocation": "11844:4:11", "nodeType": "FunctionDefinition", "parameters": {"id": 3007, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 3003, "mutability": "mutable", "name": "value", "nameLocation": "11857:5:11", "nodeType": "VariableDeclaration", "scope": 3035, "src": "11849:13:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 3002, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11849:7:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}, {"constant": false, "id": 3006, "mutability": "mutable", "name": "rounding", "nameLocation": "11873:8:11", "nodeType": "VariableDeclaration", "scope": 3035, "src": "11864:17:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_enum$_Rounding_$2301", "typeString": "enum Math.Rounding"}, "typeName": {"id": 3005, "nodeType": "UserDefinedTypeName", "pathNode": {"id": 3004, "name": "Rounding", "nameLocations": ["11864:8:11"], "nodeType": "IdentifierPath", "referencedDeclaration": 2301, "src": "11864:8:11"}, "referencedDeclaration": 2301, "src": "11864:8:11", "typeDescriptions": {"typeIdentifier": "t_enum$_Rounding_$2301", "typeString": "enum Math.Rounding"}}, "visibility": "internal"}], "src": "11848:34:11"}, "returnParameters": {"id": 3010, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 3009, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 3035, "src": "11906:7:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 3008, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "11906:7:11", "typeDescriptions": 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"isPure": false, "lValueRequested": false, "leftExpression": {"id": 3271, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3202, "src": "14356:5:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "BinaryOperation", "operator": ">>", "rightExpression": {"hexValue": "38", "id": 3272, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14365:1:11", "typeDescriptions": {"typeIdentifier": "t_rational_8_by_1", "typeString": "int_const 8"}, "value": "8"}, "src": "14356:10:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": {"hexValue": "30", "id": 3274, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14369:1:11", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}, "src": "14356:14:11", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "id": 3281, "nodeType": "IfStatement", "src": "14352:64:11", "trueBody": {"id": 3280, "nodeType": "Block", "src": "14372:44:11", "statements": [{"expression": {"id": 3278, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": {"id": 3276, "name": "result", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3208, "src": "14390:6:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "Assignment", "operator": "+=", "rightHandSide": {"hexValue": "31", "id": 3277, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14400:1:11", "typeDescriptions": {"typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1"}, "value": "1"}, "src": "14390:11:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "id": 3279, "nodeType": "ExpressionStatement", "src": "14390:11:11"}]}}]}, {"expression": {"id": 3283, "name": "result", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3208, "src": "14442:6:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "functionReturnParameters": 3206, "id": 3284, "nodeType": "Return", "src": "14435:13:11"}]}, "documentation": {"id": 3200, "nodeType": "StructuredDocumentation", "src": "13541:246:11", "text": " @dev Return the log in base 256 of a positive value rounded towards zero.\n Returns 0 if given 0.\n Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string."}, "id": 3286, "implemented": true, "kind": "function", "modifiers": [], "name": "log256", "nameLocation": "13801:6:11", "nodeType": "FunctionDefinition", "parameters": 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"name": "uint256", "nodeType": "ElementaryTypeName", "src": "13846:7:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "13845:9:11"}, "scope": 3344, "src": "13792:663:11", "stateMutability": "pure", "virtual": false, "visibility": "internal"}, {"body": {"id": 3323, "nodeType": "Block", "src": "14692:177:11", "statements": [{"id": 3322, "nodeType": "UncheckedBlock", "src": "14702:161:11", "statements": [{"assignments": [3298], "declarations": [{"constant": false, "id": 3298, "mutability": "mutable", "name": "result", "nameLocation": "14734:6:11", "nodeType": "VariableDeclaration", "scope": 3322, "src": "14726:14:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 3297, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "14726:7:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "id": 3302, "initialValue": {"arguments": [{"id": 3300, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3289, "src": "14750:5:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 3299, "name": "log256", "nodeType": "Identifier", "overloadedDeclarations": [3286, 3324], "referencedDeclaration": 3286, "src": "14743:6:11", "typeDescriptions": {"typeIdentifier": "t_function_internal_pure$_t_uint256_$returns$_t_uint256_$", "typeString": "function (uint256) pure returns (uint256)"}}, "id": 3301, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "14743:13:11", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "VariableDeclarationStatement", "src": "14726:30:11"}, {"expression": {"commonType": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "id": 3320, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 3303, "name": "result", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3298, "src": "14777:6:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": {"components": [{"condition": {"commonType": {"typeIdentifier": "t_bool", "typeString": "bool"}, "id": 3315, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"arguments": [{"id": 3305, "name": "rounding", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3292, "src": "14804:8:11", "typeDescriptions": {"typeIdentifier": "t_enum$_Rounding_$2301", "typeString": "enum Math.Rounding"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_enum$_Rounding_$2301", "typeString": "enum Math.Rounding"}], "id": 3304, "name": "unsignedRoundsUp", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3343, "src": "14787:16:11", "typeDescriptions": {"typeIdentifier": "t_function_internal_pure$_t_enum$_Rounding_$2301_$returns$_t_bool_$", "typeString": "function (enum Math.Rounding) pure returns (bool)"}}, "id": 3306, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "14787:26:11", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": {"commonType": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "id": 3314, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"commonType": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "id": 3312, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"hexValue": "31", "id": 3307, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14817:1:11", "typeDescriptions": {"typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1"}, "value": "1"}, "nodeType": "BinaryOperation", "operator": "<<", "rightExpression": {"components": [{"commonType": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "id": 3310, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 3308, "name": "result", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3298, "src": "14823:6:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "BinaryOperation", "operator": "<<", "rightExpression": {"hexValue": "33", "id": 3309, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14833:1:11", "typeDescriptions": {"typeIdentifier": "t_rational_3_by_1", "typeString": "int_const 3"}, "value": "3"}, "src": "14823:11:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "id": 3311, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "14822:13:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "src": "14817:18:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "nodeType": "BinaryOperation", "operator": "<", "rightExpression": {"id": 3313, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3289, "src": "14838:5:11", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "src": "14817:26:11", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "src": "14787:56:11", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, "falseExpression": {"hexValue": "30", "id": 3317, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14850:1:11", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}, "id": 3318, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "Conditional", "src": "14787:64:11", "trueExpression": {"hexValue": "31", "id": 3316, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "14846:1:11", "typeDescriptions": {"typeIdentifier": "t_rational_1_by_1", "typeString": 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"tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 381, "nodeType": "ExpressionStatement", "src": "2653:84:13"}, {"expression": {"arguments": [{"id": 386, "name": "creatorAddress", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 357, "src": "2775:14:13", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}], "expression": {"baseExpression": {"id": 382, "name": "allItemOwners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 172, "src": "2747:13:13", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_array$_t_address_$dyn_storage_$", "typeString": "mapping(uint256 => address[] storage ref)"}}, "id": 384, "indexExpression": {"id": 383, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 359, "src": "2761:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2747:22:13", "typeDescriptions": {"typeIdentifier": "t_array$_t_address_$dyn_storage", "typeString": "address[] storage ref"}}, "id": 385, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberLocation": "2770:4:13", "memberName": "push", "nodeType": "MemberAccess", "src": "2747:27:13", "typeDescriptions": {"typeIdentifier": "t_function_arraypush_nonpayable$_t_array$_t_address_$dyn_storage_ptr_$_t_address_$returns$__$attached_to$_t_array$_t_address_$dyn_storage_ptr_$", "typeString": "function (address[] storage pointer,address)"}}, "id": 387, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "2747:43:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 388, "nodeType": "ExpressionStatement", "src": "2747:43:13"}, {"expression": {"arguments": [{"id": 393, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 359, "src": "2834:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "expression": {"baseExpression": {"id": 389, "name": "createdItems", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 177, "src": "2800:12:13", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_address_$_t_array$_t_uint256_$dyn_storage_$", "typeString": "mapping(address => uint256[] storage ref)"}}, "id": 391, "indexExpression": {"id": 390, "name": "creatorAddress", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 357, "src": "2813:14:13", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "2800:28:13", "typeDescriptions": {"typeIdentifier": "t_array$_t_uint256_$dyn_storage", "typeString": "uint256[] storage ref"}}, "id": 392, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberLocation": "2829:4:13", "memberName": "push", "nodeType": "MemberAccess", "src": "2800:33:13", "typeDescriptions": {"typeIdentifier": "t_function_arraypush_nonpayable$_t_array$_t_uint256_$dyn_storage_ptr_$_t_uint256_$returns$__$attached_to$_t_array$_t_uint256_$dyn_storage_ptr_$", "typeString": "function (uint256[] storage pointer,uint256)"}}, "id": 394, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "2800:42:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 395, "nodeType": "ExpressionStatement", "src": "2800:42:13"}]}, "id": 397, "implemented": true, "kind": "function", "modifiers": [], "name": "setCreator", "nameLocation": "2484:10:13", "nodeType": "FunctionDefinition", "parameters": {"id": 360, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 357, "mutability": "mutable", "name": "creatorAddress", "nameLocation": "2503:14:13", "nodeType": "VariableDeclaration", "scope": 397, "src": "2495:22:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 356, "name": "address", "nodeType": "ElementaryTypeName", "src": "2495:7:13", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 359, "mutability": "mutable", "name": "tokenId", "nameLocation": "2527:7:13", "nodeType": "VariableDeclaration", "scope": 397, "src": "2519:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 358, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "2519:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "2494:41:13"}, "returnParameters": {"id": 361, "nodeType": "ParameterList", "parameters": [], "src": "2545:0:13"}, "scope": 512, "src": "2475:374:13", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal"}, {"body": {"id": 420, "nodeType": "Block", "src": "3408:219:13", "statements": [{"expression": {"arguments": [{"id": 408, "name": "currentOwnerAddress", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 400, "src": "3518:19:13", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 409, "name": "nextOwnerAddress", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 402, "src": "3539:16:13", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, {"id": 410, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 404, "src": "3557:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_address", "typeString": "address"}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 407, "name": "safeTransferFrom", "nodeType": "Identifier", "overloadedDeclarations": [995, 1021], "referencedDeclaration": 995, "src": "3501:16:13", "typeDescriptions": {"typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)"}}, "id": 411, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "3501:64:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 412, "nodeType": "ExpressionStatement", "src": "3501:64:13"}, {"expression": {"arguments": [{"id": 417, "name": "nextOwnerAddress", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 402, "src": "3603:16:13", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_address", "typeString": "address"}], "expression": {"baseExpression": {"id": 413, "name": "allItemOwners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 172, "src": "3575:13:13", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_array$_t_address_$dyn_storage_$", "typeString": "mapping(uint256 => address[] storage ref)"}}, "id": 415, "indexExpression": {"id": 414, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 404, "src": "3589:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3575:22:13", "typeDescriptions": {"typeIdentifier": "t_array$_t_address_$dyn_storage", "typeString": "address[] storage ref"}}, "id": 416, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberLocation": "3598:4:13", "memberName": "push", "nodeType": "MemberAccess", "src": "3575:27:13", "typeDescriptions": {"typeIdentifier": "t_function_arraypush_nonpayable$_t_array$_t_address_$dyn_storage_ptr_$_t_address_$returns$__$attached_to$_t_array$_t_address_$dyn_storage_ptr_$", "typeString": "function (address[] storage pointer,address)"}}, "id": 418, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "3575:45:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 419, "nodeType": "ExpressionStatement", "src": "3575:45:13"}]}, "documentation": {"id": 398, "nodeType": "StructuredDocumentation", "src": "2860:440:13", "text": " @notice updateOwnership is a function that we use it change owners of our NFT (item).\n Also we use it to add the new owner of an NFT in a list of all owners for a specific NFT.\n \n @param currentOwnerAddress ethereum address of current tokenId owner\n @param nextOwnerAddress ethereum address we want to transfer ownership to\n @param tokenId uint256 id of token we want to update ownership for"}, "functionSelector": "534a3a5c", "id": 421, "implemented": true, "kind": "function", "modifiers": [], "name": "updateOwnership", "nameLocation": "3314:15:13", "nodeType": "FunctionDefinition", "parameters": {"id": 405, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 400, "mutability": "mutable", "name": "currentOwnerAddress", "nameLocation": "3338:19:13", "nodeType": "VariableDeclaration", "scope": 421, "src": "3330:27:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 399, "name": "address", "nodeType": "ElementaryTypeName", "src": "3330:7:13", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 402, "mutability": "mutable", "name": "nextOwnerAddress", "nameLocation": "3367:16:13", "nodeType": "VariableDeclaration", "scope": 421, "src": "3359:24:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 401, "name": "address", "nodeType": "ElementaryTypeName", "src": "3359:7:13", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}, {"constant": false, "id": 404, "mutability": "mutable", "name": "tokenId", "nameLocation": "3393:7:13", "nodeType": "VariableDeclaration", "scope": 421, "src": "3385:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 403, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3385:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "3329:72:13"}, "returnParameters": {"id": 406, "nodeType": "ParameterList", "parameters": [], "src": "3408:0:13"}, "scope": 512, "src": "3305:322:13", "stateMutability": "nonpayable", "virtual": false, "visibility": "public"}, {"body": {"id": 453, "nodeType": "Block", "src": "4061:187:13", "statements": [{"expression": {"arguments": [{"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 438, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"arguments": [{"id": 432, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 424, "src": "4089:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 431, "name": "_ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1034, "src": "4080:8:13", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)"}}, "id": 433, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "4080:17:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"arguments": [{"hexValue": "30", "id": 436, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4109:1:13", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 435, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "4101:7:13", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 434, "name": "address", "nodeType": "ElementaryTypeName", "src": "4101:7:13", "typeDescriptions": {}}}, "id": 437, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "4101:10:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "4080:31:13", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, {"arguments": [{"arguments": [{"hexValue": "54686520746f6b656e206973206e6f742076616c69642e205468657265206973206e6f207375636820746f6b656e206173", "id": 443, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4137:51:13", "typeDescriptions": {"typeIdentifier": "t_stringliteral_5adfaa2aa9c262d06fa99ce7eb851020eefcc1023cbf042fe340a47f0cfc340f", "typeString": "literal_string \"The token is not valid. There is no such token as\""}, "value": "The token is not valid. There is no such token as"}, {"id": 444, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 424, "src": "4191:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_stringliteral_5adfaa2aa9c262d06fa99ce7eb851020eefcc1023cbf042fe340a47f0cfc340f", "typeString": "literal_string \"The token is not valid. There is no such token as\""}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}], "expression": {"id": 441, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "4120:3:13", "typeDescriptions": {"typeIdentifier": "t_magic_abi", "typeString": "abi"}}, "id": 442, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberLocation": "4124:12:13", "memberName": "encodePacked", "nodeType": "MemberAccess", "src": "4120:16:13", "typeDescriptions": {"typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)"}}, "id": 445, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "4120:79:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}], "id": 440, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "4113:6:13", "typeDescriptions": {"typeIdentifier": "t_type$_t_string_storage_ptr_$", "typeString": "type(string storage pointer)"}, "typeName": {"id": 439, "name": "string", "nodeType": "ElementaryTypeName", "src": "4113:6:13", "typeDescriptions": {}}}, "id": 446, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "4113:87:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_string_memory_ptr", "typeString": "string memory"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_bool", "typeString": "bool"}, {"typeIdentifier": "t_string_memory_ptr", "typeString": "string memory"}], "id": 430, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [-18, -18], "referencedDeclaration": -18, "src": "4071:7:13", "typeDescriptions": {"typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure"}}, "id": 447, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "4071:131:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 448, "nodeType": "ExpressionStatement", "src": "4071:131:13"}, {"expression": {"baseExpression": {"id": 449, "name": "allItemOwners", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 172, "src": "4219:13:13", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_array$_t_address_$dyn_storage_$", "typeString": "mapping(uint256 => address[] storage ref)"}}, "id": 451, "indexExpression": {"id": 450, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 424, "src": "4233:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4219:22:13", "typeDescriptions": {"typeIdentifier": "t_array$_t_address_$dyn_storage", "typeString": "address[] storage ref"}}, "functionReturnParameters": 429, "id": 452, "nodeType": "Return", "src": "4212:29:13"}]}, "documentation": {"id": 422, "nodeType": "StructuredDocumentation", "src": "3637:340:13", "text": " @notice Function returns a list of addresses that have owner this item.\n The first address is the item creator and the last is the current owner of the item.\n \n @param tokenId id of a nft token\n @return address[] list of all owners of token with tokenId\n \n @dev Fails is tokenId does ."}, "functionSelector": "f2a1625e", "id": 454, "implemented": true, "kind": "function", "modifiers": [], "name": "getUserHistory", "nameLocation": "3991:14:13", "nodeType": "FunctionDefinition", "parameters": {"id": 425, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 424, "mutability": "mutable", "name": "tokenId", "nameLocation": "4014:7:13", "nodeType": "VariableDeclaration", "scope": 454, "src": "4006:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}, "typeName": {"id": 423, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4006:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "visibility": "internal"}], "src": "4005:17:13"}, "returnParameters": {"id": 429, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 428, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 454, "src": "4044:16:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": {"typeIdentifier": "t_array$_t_address_$dyn_memory_ptr", "typeString": "address[]"}, "typeName": {"baseType": {"id": 426, "name": "address", "nodeType": "ElementaryTypeName", "src": "4044:7:13", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "id": 427, "nodeType": "ArrayTypeName", "src": "4044:9:13", "typeDescriptions": {"typeIdentifier": "t_array$_t_address_$dyn_storage_ptr", "typeString": "address[]"}}, "visibility": "internal"}], "src": "4043:18:13"}, "scope": 512, "src": "3982:266:13", "stateMutability": "view", "virtual": false, "visibility": "public"}, {"body": {"id": 477, "nodeType": "Block", "src": "4671:164:13", "statements": [{"expression": {"arguments": [{"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 469, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"id": 464, "name": "userAddress", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 457, "src": "4689:11:13", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"arguments": [{"hexValue": "30", "id": 467, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4712:1:13", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 466, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "4704:7:13", "typeDescriptions": {"typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)"}, "typeName": {"id": 465, "name": "address", "nodeType": "ElementaryTypeName", "src": "4704:7:13", "typeDescriptions": {}}}, "id": 468, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "4704:10:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "src": "4689:25:13", "typeDescriptions": {"typeIdentifier": "t_bool", "typeString": "bool"}}, {"hexValue": "596f7520617265206e6f7420616c6c6f77656420746f2073656520746865206372656174656420746f6b656e73207769746820616e207a65726f20616464726573732e", "id": 470, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "4716:69:13", "typeDescriptions": {"typeIdentifier": "t_stringliteral_418546e688bee38d6231af9f1bdc039740fb118634a60fcd243dbd2350261b16", "typeString": "literal_string \"You are not allowed to see the created tokens with an zero address.\""}, "value": "You are not allowed to see the created tokens with an zero address."}], "expression": {"argumentTypes": [{"typeIdentifier": "t_bool", "typeString": "bool"}, {"typeIdentifier": "t_stringliteral_418546e688bee38d6231af9f1bdc039740fb118634a60fcd243dbd2350261b16", "typeString": "literal_string \"You are not allowed to see the created tokens with an zero address.\""}], "id": 463, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [-18, -18], "referencedDeclaration": -18, "src": "4681:7:13", "typeDescriptions": {"typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure"}}, "id": 471, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "4681:105:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 472, "nodeType": "ExpressionStatement", "src": "4681:105:13"}, {"expression": {"baseExpression": {"id": 473, "name": "createdItems", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 177, "src": "4803:12:13", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_address_$_t_array$_t_uint256_$dyn_storage_$", "typeString": "mapping(address => uint256[] storage ref)"}}, "id": 475, "indexExpression": {"id": 474, "name": "userAddress", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 457, "src": "4816:11:13", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "4803:25:13", "typeDescriptions": {"typeIdentifier": "t_array$_t_uint256_$dyn_storage", "typeString": "uint256[] storage ref"}}, "functionReturnParameters": 462, "id": 476, "nodeType": "Return", "src": "4796:32:13"}]}, "documentation": {"id": 455, "nodeType": "StructuredDocumentation", "src": "4253:324:13", "text": " @notice Function returns a list of user items.  \n \n @param userAddress the user's Address for whome all the items will be retun.\n                    Like user's intentory.\n @return createdItems[] list of all user items.\n @dev fails if the userAdderss is a zero address."}, "functionSelector": "10c8b433", "id": 478, "implemented": true, "kind": "function", "modifiers": [], "name": "getCreatedItemTokens", "nameLocation": "4591:20:13", "nodeType": "FunctionDefinition", "parameters": {"id": 458, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 457, "mutability": "mutable", "name": "userAddress", "nameLocation": "4620:11:13", "nodeType": "VariableDeclaration", "scope": 478, "src": "4612:19:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}, "typeName": {"id": 456, "name": "address", "nodeType": "ElementaryTypeName", "src": "4612:7:13", "stateMutability": "nonpayable", "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "visibility": "internal"}], "src": "4611:21:13"}, "returnParameters": {"id": 462, "nodeType": "ParameterList", "parameters": [{"constant": false, "id": 461, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 478, "src": "4653:16:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": {"typeIdentifier": "t_array$_t_uint256_$dyn_memory_ptr", "typeString": "uint256[]"}, "typeName": {"baseType": {"id": 459, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4653:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "id": 460, "nodeType": "ArrayTypeName", "src": "4653:9:13", "typeDescriptions": {"typeIdentifier": "t_array$_t_uint256_$dyn_storage_ptr", "typeString": "uint256[]"}}, "visibility": "internal"}], "src": "4652:18:13"}, "scope": 512, "src": "4582:253:13", "stateMutability": "view", "virtual": false, "visibility": "public"}, {"body": {"id": 510, "nodeType": "Block", "src": "5215:186:13", "statements": [{"expression": {"arguments": [{"commonType": {"typeIdentifier": "t_address", "typeString": "address"}, "id": 495, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": {"arguments": [{"id": 489, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 481, "src": "5243:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_uint256", "typeString": "uint256"}], "id": 488, "name": "_ownerOf", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1034, "src": "5234:8:13", "typeDescriptions": {"typeIdentifier": "t_function_internal_view$_t_uint256_$returns$_t_address_$", "typeString": "function (uint256) view returns (address)"}}, "id": 490, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "5234:17:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_address", "typeString": "address"}}, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": {"arguments": [{"hexValue": "30", "id": 493, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5263:1:13", "typeDescriptions": {"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}, "value": "0"}], "expression": {"argumentTypes": [{"typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0"}], "id": 492, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5255:7:13", "typeDescriptions": 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"t_stringliteral_5adfaa2aa9c262d06fa99ce7eb851020eefcc1023cbf042fe340a47f0cfc340f", "typeString": "literal_string \"The token is not valid. There is no such token as\""}, "value": "The token is not valid. There is no such token as"}, {"id": 501, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 481, "src": "5345:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_stringliteral_5adfaa2aa9c262d06fa99ce7eb851020eefcc1023cbf042fe340a47f0cfc340f", "typeString": "literal_string \"The token is not valid. There is no such token as\""}, {"typeIdentifier": "t_uint256", "typeString": "uint256"}], "expression": {"id": 498, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "5274:3:13", "typeDescriptions": {"typeIdentifier": "t_magic_abi", "typeString": "abi"}}, "id": 499, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberLocation": "5278:12:13", "memberName": "encodePacked", "nodeType": "MemberAccess", "src": "5274:16:13", "typeDescriptions": {"typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)"}}, "id": 502, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "5274:79:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory"}], "id": 497, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5267:6:13", "typeDescriptions": {"typeIdentifier": "t_type$_t_string_storage_ptr_$", "typeString": "type(string storage pointer)"}, "typeName": {"id": 496, "name": "string", "nodeType": "ElementaryTypeName", "src": "5267:6:13", "typeDescriptions": {}}}, "id": 503, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "5267:87:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_string_memory_ptr", "typeString": "string memory"}}], "expression": {"argumentTypes": [{"typeIdentifier": "t_bool", "typeString": "bool"}, {"typeIdentifier": "t_string_memory_ptr", "typeString": "string memory"}], "id": 487, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [-18, -18], "referencedDeclaration": -18, "src": "5225:7:13", "typeDescriptions": {"typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure"}}, "id": 504, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "nameLocations": [], "names": [], "nodeType": "FunctionCall", "src": "5225:130:13", "tryCall": false, "typeDescriptions": {"typeIdentifier": "t_tuple$__$", "typeString": "tuple()"}}, "id": 505, "nodeType": "ExpressionStatement", "src": "5225:130:13"}, {"expression": {"baseExpression": {"id": 506, "name": "itemPassports", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 167, "src": "5372:13:13", "typeDescriptions": {"typeIdentifier": "t_mapping$_t_uint256_$_t_struct$_Passport_$162_storage_$", "typeString": "mapping(uint256 => struct ItemBlocks.Passport storage ref)"}}, "id": 508, "indexExpression": {"id": 507, "name": "tokenId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 481, "src": "5386:7:13", "typeDescriptions": {"typeIdentifier": "t_uint256", "typeString": "uint256"}}, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "5372:22:13", "typeDescriptions": {"typeIdentifier": "t_struct$_Passport_$162_storage", "typeString": "struct ItemBlocks.Passport storage ref"}}, "functionReturnParameters": 486, "id": 509, "nodeType": "Return", "src": "5365:29:13"}]}, "documentation": {"id": 479, "nodeType": "StructuredDocumentation", "src": "4850:284:13", "text": " @notice Function returns a Passport for an item (tokenId).\n @param tokenId the item's Id that we want to retun the Passport.\n @return itemPassport[tokenId] the Passport of the item (token).\n @dev fails if the tokenId does not exists."}, "functionSelector": "9f5679f4", "id": 511, 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"userdoc": {"methods": {"getCreatedItemTokens(address)": {"notice": "Function returns a list of user items.   "}, "getPassport(uint256)": {"notice": "Function returns a Passport for an item (tokenId)."}, "getUserHistory(uint256)": {"notice": "Function returns a list of addresses that have owner this item. The first address is the item creator and the last is the current owner of the item. "}, "updateOwnership(address,address,uint256)": {"notice": "updateOwnership is a function that we use it change owners of our NFT (item). Also we use it to add the new owner of an NFT in a list of all owners for a specific NFT. "}}, "notice": " "}, "devdoc": {"methods": {"approve(address,uint256)": {"author": null, "details": "See {IERC721-approve}.", "params": {}, "return": null}, "balanceOf(address)": {"author": null, "details": "See {IERC721-balanceOf}.", "params": {}, "return": null}, "getApproved(uint256)": {"author": null, "details": "See {IERC721-getApproved}.", "params": {}, "return": null}, "getCreatedItemTokens(address)": {"author": null, "details": "fails if the userAdderss is a zero address.", "params": {"userAddress": "the user's Address for whome all the items will be retun.                    Like user's intentory."}, "return": null}, "getPassport(uint256)": {"author": null, "details": "fails if the tokenId does not exists.", "params": {"tokenId": "the item's Id that we want to retun the Passport."}, "return": null}, "getUserHistory(uint256)": {"author": null, "details": "Fails is tokenId does .", "params": {"tokenId": "id of a nft token"}, "return": null}, "isApprovedForAll(address,address)": {"author": null, "details": "See {IERC721-isApprovedForAll}.", "params": {}, "return": null}, "name()": {"author": null, "details": "See {IERC721Metadata-name}.", "params": {}, "return": null}, "owner()": {"author": null, "details": "Returns the address of the current owner.", "params": {}, "return": null}, "ownerOf(uint256)": {"author": null, "details": "See {IERC721-ownerOf}.", "params": {}, "return": null}, "renounceOwnership()": {"author": null, "details": "Leaves the contract without owner. It will not be possible to call `onlyOwner` functions. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby disabling any functionality that is only available to the owner.", "params": {}, "return": null}, "safeTransferFrom(address,address,uint256)": {"author": null, "details": "See {IERC721-safeTransferFrom}.", "params": {}, "return": null}, "safeTransferFrom(address,address,uint256,bytes)": {"author": null, "details": "See {IERC721-safeTransferFrom}.", "params": {}, "return": null}, "setApprovalForAll(address,bool)": {"author": null, "details": "See {IERC721-setApprovalForAll}.", "params": {}, "return": null}, "supportsInterface(bytes4)": {"author": null, "details": "See {IERC165-supportsInterface}.", "params": {}, "return": null}, "symbol()": {"author": null, "details": "See {IERC721Metadata-symbol}.", "params": {}, "return": null}, "tokenURI(uint256)": {"author": null, "details": "See {IERC721Metadata-tokenURI}.", "params": {}, "return": null}, "transferFrom(address,address,uint256)": {"author": null, "details": "See {IERC721-transferFrom}.", "params": {}, "return": null}, "transferOwnership(address)": {"author": null, "details": "Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner.", "params": {}, "return": null}, "updateOwnership(address,address,uint256)": {"author": null, "details": null, "params": {"currentOwnerAddress": "ethereum address of current tokenId owner", "nextOwnerAddress": "ethereum address we want to transfer ownership to", "tokenId": "uint256 id of token we want to update ownership for"}, "return": null}}, "author": null, "details": "There are some specific addresses in Echidna: 0x30000 calls the constructor. 0x10000, 0x20000, and 0x30000 randomly call other functions.", "title": null}, "libraries": {}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/access/Ownable.sol:Ownable": {"srcmap": "", "srcmap-runtime": "", "abi": "[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"name\":\"OwnableInvalidOwner\",\"type\":\"error\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"OwnableUnauthorizedAccount\",\"type\":\"error\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]", "bin": "", "bin-runtime": "", "userdoc": {"methods": {}, "notice": null}, "devdoc": {"methods": {"constructor": {"author": null, "details": "Initializes the contract setting the address provided by the deployer as the initial owner.", "params": {}, "return": null}, "owner()": {"author": null, "details": "Returns the address of the current owner.", "params": {}, "return": null}, "renounceOwnership()": {"author": null, "details": "Leaves the contract without owner. 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It will make available the modifier `onlyOwner`, which can be applied to your functions to restrict their use to the owner.", "title": null}, "libraries": {}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/interfaces/draft-IERC6093.sol:IERC1155Errors": {"srcmap": "", "srcmap-runtime": "", "abi": 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"bin": "", "bin-runtime": "", "userdoc": {"methods": {}, "notice": null}, "devdoc": {"methods": {}, "author": null, "details": "Standard ERC1155 Errors Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens.", "title": null}, "libraries": {}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/interfaces/draft-IERC6093.sol:IERC20Errors": {"srcmap": "", "srcmap-runtime": "", "abi": "[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"allowance\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"needed\",\"type\":\"uint256\"}],\"name\":\"ERC20InsufficientAllowance\",\"type\":\"error\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"balance\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"needed\",\"type\":\"uint256\"}],\"name\":\"ERC20InsufficientBalance\",\"type\":\"error\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"approver\",\"type\":\"address\"}],\"name\":\"ERC20InvalidApprover\",\"type\":\"error\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"receiver\",\"type\":\"address\"}],\"name\":\"ERC20InvalidReceiver\",\"type\":\"error\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"}],\"name\":\"ERC20InvalidSender\",\"type\":\"error\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"}],\"name\":\"ERC20InvalidSpender\",\"type\":\"error\"}]", "bin": "", "bin-runtime": "", "userdoc": {"methods": {}, "notice": null}, "devdoc": {"methods": {}, "author": null, "details": "Standard ERC20 Errors Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens.", "title": null}, "libraries": {}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/interfaces/draft-IERC6093.sol:IERC721Errors": {"srcmap": "", "srcmap-runtime": "", "abi": 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"bin": "", "bin-runtime": "", "userdoc": {"methods": {}, "notice": null}, "devdoc": {"methods": {}, "author": null, "details": "Standard ERC721 Errors Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens.", "title": null}, "libraries": {}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/token/ERC721/ERC721.sol:ERC721": {"srcmap": "", "srcmap-runtime": "", "abi": 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"bin": "", "bin-runtime": "", "userdoc": {"methods": {}, "notice": null}, "devdoc": {"methods": {"approve(address,uint256)": {"author": null, "details": "See {IERC721-approve}.", "params": {}, "return": null}, "balanceOf(address)": {"author": null, "details": "See {IERC721-balanceOf}.", "params": {}, "return": null}, "constructor": {"author": null, "details": "Initializes the contract by setting a `name` and a `symbol` to the token collection.", "params": {}, "return": null}, "getApproved(uint256)": {"author": null, "details": "See {IERC721-getApproved}.", "params": {}, "return": null}, "isApprovedForAll(address,address)": {"author": null, "details": "See {IERC721-isApprovedForAll}.", "params": {}, "return": null}, "name()": {"author": null, "details": "See {IERC721Metadata-name}.", "params": {}, "return": null}, "ownerOf(uint256)": {"author": null, "details": "See {IERC721-ownerOf}.", "params": {}, "return": null}, "safeTransferFrom(address,address,uint256)": {"author": null, 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"bin": "", "bin-runtime": "", "userdoc": {"methods": {}, "notice": null}, "devdoc": {"methods": {"approve(address,uint256)": {"author": null, "details": "Gives permission to `to` to transfer `tokenId` token to another account. The approval is cleared when the token is transferred. Only a single account can be approved at a time, so approving the zero address clears previous approvals. Requirements: - The caller must own the token or be an approved operator. - `tokenId` must exist. Emits an {Approval} event.", "params": {}, "return": null}, "balanceOf(address)": {"author": null, "details": "Returns the number of tokens in ``owner``'s account.", "params": {}, "return": null}, "getApproved(uint256)": {"author": null, "details": "Returns the account approved for `tokenId` token. Requirements: - `tokenId` must exist.", "params": {}, "return": null}, "isApprovedForAll(address,address)": {"author": null, "details": "Returns if the `operator` is allowed to manage all of the assets of `owner`. See {setApprovalForAll}", "params": {}, "return": null}, "ownerOf(uint256)": {"author": null, "details": "Returns the owner of the `tokenId` token. Requirements: - `tokenId` must exist.", "params": {}, "return": null}, "safeTransferFrom(address,address,uint256)": {"author": null, "details": "Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients are aware of the ERC721 protocol to prevent tokens from being forever locked. Requirements: - `from` cannot be the zero address. - `to` cannot be the zero address. - `tokenId` token must exist and be owned by `from`. - If the caller is not `from`, it must have been allowed to move this token by either {approve} or   {setApprovalForAll}. - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon   a safe transfer. Emits a {Transfer} event.", "params": {}, "return": null}, "safeTransferFrom(address,address,uint256,bytes)": {"author": null, "details": "Safely transfers `tokenId` token from `from` to `to`. Requirements: - `from` cannot be the zero address. - `to` cannot be the zero address. - `tokenId` token must exist and be owned by `from`. - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon   a safe transfer. Emits a {Transfer} event.", "params": {}, "return": null}, "setApprovalForAll(address,bool)": {"author": null, "details": "Approve or remove `operator` as an operator for the caller. Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. Requirements: - The `operator` cannot be the address zero. Emits an {ApprovalForAll} event.", "params": {}, "return": null}, "supportsInterface(bytes4)": {"author": null, "details": "Returns true if this contract implements the interface defined by `interfaceId`. See the corresponding https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] to learn more about how these ids are created. This function call must use less than 30 000 gas.", "params": {}, "return": null}, "transferFrom(address,address,uint256)": {"author": null, "details": "Transfers `tokenId` token from `from` to `to`. WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must understand this adds an external call which potentially creates a reentrancy vulnerability. Requirements: - `from` cannot be the zero address. - `to` cannot be the zero address. - `tokenId` token must be owned by `from`. - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. Emits a {Transfer} event.", "params": {}, "return": null}}, "author": null, "details": "Required interface of an ERC721 compliant contract.", "title": null}, "libraries": {}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/token/ERC721/IERC721Receiver.sol:IERC721Receiver": {"srcmap": "", "srcmap-runtime": "", "abi": "[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"}],\"name\":\"onERC721Received\",\"outputs\":[{\"internalType\":\"bytes4\",\"name\":\"\",\"type\":\"bytes4\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]", "bin": "", "bin-runtime": "", "userdoc": {"methods": {}, "notice": null}, "devdoc": {"methods": {"onERC721Received(address,address,uint256,bytes)": {"author": null, "details": "Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} by `operator` from `from`, this function is called. It must return its Solidity selector to confirm the token transfer. If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.", "params": {}, "return": null}}, "author": null, "details": "Interface for any contract that wants to support safeTransfers from ERC721 asset contracts.", "title": "ERC721 token receiver interface"}, "libraries": {}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/token/ERC721/extensions/IERC721Metadata.sol:IERC721Metadata": {"srcmap": "", "srcmap-runtime": "", "abi": 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The approval is cleared when the token is transferred. Only a single account can be approved at a time, so approving the zero address clears previous approvals. Requirements: - The caller must own the token or be an approved operator. - `tokenId` must exist. Emits an {Approval} event.", "params": {}, "return": null}, "balanceOf(address)": {"author": null, "details": "Returns the number of tokens in ``owner``'s account.", "params": {}, "return": null}, "getApproved(uint256)": {"author": null, "details": "Returns the account approved for `tokenId` token. Requirements: - `tokenId` must exist.", "params": {}, "return": null}, "isApprovedForAll(address,address)": {"author": null, "details": "Returns if the `operator` is allowed to manage all of the assets of `owner`. See {setApprovalForAll}", "params": {}, "return": null}, "name()": {"author": null, "details": "Returns the token collection name.", "params": {}, "return": null}, "ownerOf(uint256)": {"author": null, "details": "Returns the owner of the `tokenId` token. Requirements: - `tokenId` must exist.", "params": {}, "return": null}, "safeTransferFrom(address,address,uint256)": {"author": null, "details": "Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients are aware of the ERC721 protocol to prevent tokens from being forever locked. Requirements: - `from` cannot be the zero address. - `to` cannot be the zero address. - `tokenId` token must exist and be owned by `from`. - If the caller is not `from`, it must have been allowed to move this token by either {approve} or   {setApprovalForAll}. - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon   a safe transfer. Emits a {Transfer} event.", "params": {}, "return": null}, "safeTransferFrom(address,address,uint256,bytes)": {"author": null, "details": "Safely transfers `tokenId` token from `from` to `to`. Requirements: - `from` cannot be the zero address. - `to` cannot be the zero address. - `tokenId` token must exist and be owned by `from`. - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon   a safe transfer. Emits a {Transfer} event.", "params": {}, "return": null}, "setApprovalForAll(address,bool)": {"author": null, "details": "Approve or remove `operator` as an operator for the caller. Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. Requirements: - The `operator` cannot be the address zero. Emits an {ApprovalForAll} event.", "params": {}, "return": null}, "supportsInterface(bytes4)": {"author": null, "details": "Returns true if this contract implements the interface defined by `interfaceId`. See the corresponding https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] to learn more about how these ids are created. This function call must use less than 30 000 gas.", "params": {}, "return": null}, "symbol()": {"author": null, "details": "Returns the token collection symbol.", "params": {}, "return": null}, "tokenURI(uint256)": {"author": null, "details": "Returns the Uniform Resource Identifier (URI) for `tokenId` token.", "params": {}, "return": null}, "transferFrom(address,address,uint256)": {"author": null, "details": "Transfers `tokenId` token from `from` to `to`. WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must understand this adds an external call which potentially creates a reentrancy vulnerability. Requirements: - `from` cannot be the zero address. - `to` cannot be the zero address. - `tokenId` token must be owned by `from`. - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. Emits a {Transfer} event.", "params": {}, "return": null}}, "author": null, "details": "See https://eips.ethereum.org/EIPS/eip-721", "title": "ERC-721 Non-Fungible Token Standard, optional metadata extension"}, "libraries": {}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/utils/Context.sol:Context": {"srcmap": "", "srcmap-runtime": "", "abi": "[]", "bin": "", "bin-runtime": "", "userdoc": {"methods": {}, "notice": null}, "devdoc": {"methods": {}, "author": null, "details": "Provides information about the current execution context, including the sender of the transaction and its data. While these are generally available via msg.sender and msg.data, they should not be accessed in such a direct manner, since when dealing with meta-transactions the account sending and paying for execution may not be the actual sender (as far as an application is concerned). This contract is only required for intermediate, library-like contracts.", "title": null}, "libraries": {}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/utils/Strings.sol:Strings": {"srcmap": "251:2847:8:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;251:2847:8;;;;;;;;;;;;;;;;;", "srcmap-runtime": "251:2847:8:-:0;;;;;;;;", "abi": "[{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"length\",\"type\":\"uint256\"}],\"name\":\"StringsInsufficientHexLength\",\"type\":\"error\"}]", "bin": "60556032600b8282823980515f1a607314602657634e487b7160e01b5f525f60045260245ffd5b305f52607381538281f3fe730000000000000000000000000000000000000000301460806040525f80fdfea26469706673582212208f85e8bafe78b98a73ca22611ba545fa83ccde1c933b55312d785691de3d3c0d64736f6c63430008160033", "bin-runtime": "730000000000000000000000000000000000000000301460806040525f80fdfea26469706673582212208f85e8bafe78b98a73ca22611ba545fa83ccde1c933b55312d785691de3d3c0d64736f6c63430008160033", "userdoc": {"methods": {}, "notice": null}, "devdoc": {"methods": {}, "author": null, "details": "String operations.", "title": null}, "libraries": {}}, "/Users/fabian/Code/ItemBlocks/contract/lib/openzeppelin-contracts/contracts/utils/introspection/ERC165.sol:ERC165": {"srcmap": "", "srcmap-runtime": "", "abi": "[{\"inputs\":[{\"internalType\":\"bytes4\",\"name\":\"interfaceId\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"}]", "bin": "", "bin-runtime": "", "userdoc": {"methods": {}, "notice": null}, "devdoc": {"methods": {"supportsInterface(bytes4)": {"author": null, "details": "See {IERC165-supportsInterface}.", "params": {}, "return": null}}, "author": null, "details": "Implementation of the {IERC165} interface. Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check for the additional interface id that will be supported. 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"userdoc": {"methods": {"getCreatedItemTokens(address)": {"notice": "Function returns a list of user items.   "}, "getPassport(uint256)": {"notice": "Function returns a Passport for an item (tokenId)."}, "getUserHistory(uint256)": {"notice": "Function returns a list of addresses that have owner this item. The first address is the item creator and the last is the current owner of the item. "}, "updateOwnership(address,address,uint256)": {"notice": "updateOwnership is a function that we use it change owners of our NFT (item). Also we use it to add the new owner of an NFT in a list of all owners for a specific NFT. "}}, "notice": null}, "devdoc": {"methods": {"approve(address,uint256)": {"author": null, "details": "See {IERC721-approve}.", "params": {}, "return": null}, "balanceOf(address)": {"author": null, "details": "See {IERC721-balanceOf}.", "params": {}, "return": null}, "getApproved(uint256)": {"author": null, "details": "See {IERC721-getApproved}.", "params": {}, "return": null}, "getCreatedItemTokens(address)": {"author": null, "details": "fails if the userAdderss is a zero address.", "params": {"userAddress": "the user's Address for whome all the items will be retun.                    Like user's intentory."}, "return": null}, "getPassport(uint256)": {"author": null, "details": "fails if the tokenId does not exists.", "params": {"tokenId": "the item's Id that we want to retun the Passport."}, "return": null}, "getUserHistory(uint256)": {"author": null, "details": "Fails is tokenId does .", "params": {"tokenId": "id of a nft token"}, "return": null}, "isApprovedForAll(address,address)": {"author": null, "details": "See {IERC721-isApprovedForAll}.", "params": {}, "return": null}, "name()": {"author": null, "details": "See {IERC721Metadata-name}.", "params": {}, "return": null}, "owner()": {"author": null, "details": "Returns the address of the current owner.", "params": {}, "return": null}, "ownerOf(uint256)": {"author": null, "details": "See {IERC721-ownerOf}.", "params": {}, "return": null}, "renounceOwnership()": {"author": null, "details": "Leaves the contract without owner. It will not be possible to call `onlyOwner` functions. Can only be called by the current owner. NOTE: Renouncing ownership will leave the contract without an owner, thereby disabling any functionality that is only available to the owner.", "params": {}, "return": null}, "safeTransferFrom(address,address,uint256)": {"author": null, "details": "See {IERC721-safeTransferFrom}.", "params": {}, "return": null}, "safeTransferFrom(address,address,uint256,bytes)": {"author": null, "details": "See {IERC721-safeTransferFrom}.", "params": {}, "return": null}, "setApprovalForAll(address,bool)": {"author": null, "details": "See {IERC721-setApprovalForAll}.", "params": {}, "return": null}, "supportsInterface(bytes4)": {"author": null, "details": "See {IERC165-supportsInterface}.", "params": {}, "return": null}, "symbol()": {"author": null, "details": "See {IERC721Metadata-symbol}.", "params": {}, "return": null}, "tokenURI(uint256)": {"author": null, "details": "See {IERC721Metadata-tokenURI}.", "params": {}, "return": null}, "transferFrom(address,address,uint256)": {"author": null, "details": "See {IERC721-transferFrom}.", "params": {}, "return": null}, "transferOwnership(address)": {"author": null, "details": "Transfers ownership of the contract to a new account (`newOwner`). Can only be called by the current owner.", "params": {}, "return": null}, "updateOwnership(address,address,uint256)": {"author": null, "details": null, "params": {"currentOwnerAddress": "ethereum address of current tokenId owner", "nextOwnerAddress": "ethereum address we want to transfer ownership to", "tokenId": "uint256 id of token we want to update ownership for"}, "return": null}}, "author": null, "details": null, "title": null}, "libraries": {}}}}
\ No newline at end of file
diff --git a/contract/echidna/PropertyTest.sol b/contract/echidna/PropertyTest.sol
new file mode 100644
index 0000000..1ba7bef
--- /dev/null
+++ b/contract/echidna/PropertyTest.sol
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.18;
+
+import "../src/ItemBlocks.sol";
+
+/**
+ * @title 
+ * @author 
+ * @notice 
+ * 
+ * @dev There are some specific addresses in Echidna:
+        0x30000 calls the constructor.
+        0x10000, 0x20000, and 0x30000 randomly call other functions.
+ */
+contract ItemBlocksPropertyTest is ItemBlocks {
+    uint256 testTokenId = 0;
+
+    constructor() ItemBlocks(address(0x30000)) {
+        testTokenId = createPassport(7, "TestItemName", "TestItemDesc", "TestItemFamily", "TestItemUrl","TestItemImg");
+    }
+
+    // owner should never be zero address
+    function echidna_owner_not_zero() public view returns (bool) {
+        return ownerOf(testTokenId) != address(0);
+    }
+
+    // item creator should always be the first entry in allItem Owners
+    function echidna_set_creator() public view returns (bool){
+        return allItemOwners[7][0] == address(0x30000);
+    }
+
+    // it should be possible to create more items
+    function echidna_create_more() public view returns (bool) {
+        return createdItems[address(0x30000)].length >= 1;
+    }
+
+    // if there is a owner in the allItemsOwners array there should be a passport too
+    function echidna_need_to_create_history_and_passport() public view returns (bool) {
+        if (allItemOwners[7].length > 0) {
+            return bytes(itemPassports[7].name).length > 0;
+        } else {
+            return true;
+        }
+    }
+
+    // current owner should be the last entry in allItemOwners
+    function echidna_owner_is_last_entry_allItemOwners() public view returns (bool) {
+        if (allItemOwners[1].length > 0) {
+            address[] memory test = allItemOwners[1];
+            return test[test.length - 1] == ownerOf(1);
+        } else {
+            return true;
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/contract/src/ItemBlocks.sol b/contract/src/ItemBlocks.sol
index a220cbb..fce7510 100644
--- a/contract/src/ItemBlocks.sol
+++ b/contract/src/ItemBlocks.sol
@@ -33,13 +33,13 @@ contract ItemBlocks is ERC721, Ownable {
         _safeMint(to, tokenId);
     }
 
-    function createPassport(uint tokenId, string calldata name, string calldata desc, string calldata family, string calldata url, string calldata img) public returns(uint256) {
+    function createPassport(uint tokenId, string memory name, string memory desc, string memory family, string memory url, string memory img) public returns(uint256) {
         _safeMint(msg.sender, tokenId);
         setCreator(msg.sender, tokenId);
         return updatePassport(tokenId, name, desc, family, url, img);
     }
 
-    function updatePassport(uint tokenId, string calldata name, string calldata desc, string calldata family, string calldata url, string calldata img) public returns(uint256) {        
+    function updatePassport(uint tokenId, string memory name, string memory desc, string memory family, string memory url, string memory img) public returns(uint256) {        
         require( isEligible(tokenId, msg.sender), "Must be the owner of the item or the creator of it" );
 
         itemPassports[tokenId] = Passport ({
diff --git a/images/echidna.png b/images/echidna.png
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