feat: add layer zero examples

tools/layer-zero-example/.env.example

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+# keys
+HEDERA_PK=0x
+BSC_PK=0x
+
+# OApp config
+OAPP_HEDERA_CONTRACT=0x
+OAPP_BSC_CONTRACT=0x
+
+# OFT config
+OFT_HEDERA_CONTRACT=0x
+OFT_BSC_CONTRACT=0x
+
+# OFT Adapter config
+ERC20_HEDERA_CONTRACT=0x
+ERC20_BSC_CONTRACT=0x
+OFT_ADAPTER_HEDERA_CONTRACT=0x
+OFT_ADAPTER_BSC_CONTRACT=0x
+
+# ONFT config
+ONFT_HEDERA_CONTRACT=0x
+ONFT_BSC_CONTRACT=0x
+
+# ONFT Adapter config
+ERC721_HEDERA_CONTRACT=0x
+ERC721_BSC_CONTRACT=0x
+ONFT_ADAPTER_HEDERA_CONTRACT=0x
+ONFT_ADAPTER_BSC_CONTRACT=0x
+
+# HTS Connector config
+HTS_CONNECTOR_HEDERA_CONTRACT=0x
+HTS_CONNECTOR_BSC_CONTRACT=0x
+
+# HTS Adapter config
+HTS_ADAPTER_HTS_HEDERA_CONTRACT=0x
+HTS_ADAPTER_ERC20_BSC_CONTRACT=0x
+HTS_ADAPTER_HEDERA_CONTRACT=0x
+HTS_ADAPTER_BSC_CONTRACT=0x
+
+# WHBAR config
+WHBAR_HEDERA_CONTRACT=0x
+WHBAR_BSC_CONTRACT=0x
+WHBAR_HEDERA_ADAPTER_CONTRACT=0x
+WHBAR_BSC_ADAPTER_CONTRACT=0x

tools/layer-zero-example/.gitignore

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+node_modules
+.env
+
+# Hardhat files
+/cache
+/artifacts
+
+# TypeChain files
+/typechain
+/typechain-types
+
+# solidity-coverage files
+/coverage
+/coverage.json
+
+# Hardhat Ignition default folder for deployments against a local node
+ignition/deployments/chain-31337

tools/layer-zero-example/README.md

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+# Layer Zero examples
+
+### OApp
+
+npx hardhat deploy-oapp --network hedera_testnet
+npx hardhat deploy-oapp --network bsc_testnet
+
+npx hardhat set-peer --source <hedera_oapp_address> --target <bsc_oapp_address> --network hedera_testnet
+npx hardhat set-peer --source <bsc_oapp_address> --target <hedera_oapp_address> --network bsc_testnet
+
+fill the .env
+
+npx hardhat test --grep "OAppTests @hedera @send" --network hedera_testnet
+npx hardhat test --grep "OAppTests @bsc @send" --network bsc_testnet
+
+wait a couple minutes, the LZ progress can be tracked on https://testnet.layerzeroscan.com/tx/<tx_hash>
+
+npx hardhat test --grep "OAppTests @hedera @test" --network hedera_testnet
+npx hardhat test --grep "OAppTests @bsc @test" --network bsc_testnet
+
+
+### OFT
+
+npx hardhat deploy-oft --decimals 18 --mint 1000000000000000000 --network hedera_testnet
+npx hardhat deploy-oft --decimals 18 --mint 1000000000000000000 --network bsc_testnet
+
+npx hardhat set-peer --source <hedera_oft_address> --target <bsc_oft_address> --network hedera_testnet
+npx hardhat set-peer --source <bsc_oft_address> --target <hedera_oft_address> --network bsc_testnet
+
+fill the .env
+
+npx hardhat test --grep "OFTTests @hedera @send" --network hedera_testnet
+npx hardhat test --grep "OFTTests @bsc @send" --network bsc_testnet
+
+wait a couple minutes, the LZ progress can be tracked on https://testnet.layerzeroscan.com/tx/<tx_hash>
+
+npx hardhat test --grep "OFTTests @hedera @test" --network hedera_testnet
+npx hardhat test --grep "OFTTests @bsc @test" --network bsc_testnet
+
+### OFT Adapter
+
+npx hardhat deploy-erc20 --decimals 18 --mint 10000000000000000000 --network hedera_testnet
+npx hardhat deploy-erc20 --decimals 18 --mint 10000000000000000000 --network bsc_testnet
+
+npx hardhat deploy-oft-adapter --token <erc20_hedera_address> --network hedera_testnet
+npx hardhat deploy-oft-adapter --token <erc20_bsc_address> --network bsc_testnet
+
+npx hardhat set-peer --source <hedera_oft_adapter_address> --target <bsc_oft_adapter_address> --network hedera_testnet
+npx hardhat set-peer --source <bsc_oft_adapter_address> --target <hedera_oft_adapter_address> --network bsc_testnet
+
+fill the .env
+
+npx hardhat test --grep "OFTAdapterTests @hedera @fund-and-approve" --network hedera_testnet
+npx hardhat test --grep "OFTAdapterTests @bsc @fund-and-approve" --network bsc_testnet
+
+npx hardhat test --grep "OFTAdapterTests @hedera @send" --network hedera_testnet
+npx hardhat test --grep "OFTAdapterTests @bsc @send" --network bsc_testnet
+
+wait a couple minutes, the LZ progress can be tracked on https://testnet.layerzeroscan.com/tx/<tx_hash>
+
+npx hardhat test --grep "OFTAdapterTests @hedera @test" --network hedera_testnet
+npx hardhat test --grep "OFTAdapterTests @bsc @test" --network bsc_testnet
+
+### ONFT
+
+npx hardhat deploy-onft --network hedera_testnet
+npx hardhat deploy-onft --network bsc_testnet
+
+npx hardhat set-peer --source <hedera_onft_address> --target <bsc_onft_address> --network hedera_testnet
+npx hardhat set-peer --source <bsc_onft_address> --target <hedera_onft_address> --network bsc_testnet
+
+fill the .env
+
+npx hardhat test --grep "ONFTTests @hedera @send" --network hedera_testnet
+npx hardhat test --grep "ONFTTests @bsc @send" --network bsc_testnet
+
+wait a couple minutes, the LZ progress can be tracked on https://testnet.layerzeroscan.com/tx/<tx_hash>
+
+npx hardhat test --grep "ONFTTests @hedera @send" --network hedera_testnet
+npx hardhat test --grep "ONFTTests @bsc @send" --network bsc_testnet
+
+### ONFT Adapter
+
+npx hardhat deploy-erc721 --network hedera_testnet
+npx hardhat deploy-erc721 --network bsc_testnet
+
+npx hardhat deploy-onft-adapter --token <erc721_hedera_address> --network hedera_testnet
+npx hardhat deploy-onft-adapter --token <erc721_bsc_address> --network bsc_testnet
+
+npx hardhat set-peer --source <hedera_onft_adapter_address> --target <bsc_onft_adapter_address> --network hedera_testnet
+npx hardhat set-peer --source <bsc_onft_adapter_address> --target <hedera_onft_adapter_address> --network bsc_testnet
+
+fill the .env
+
+npx hardhat test --grep "ONFTAdapterTests @hedera @mint" --network hedera_testnet
+npx hardhat test --grep "ONFTAdapterTests @bsc @mint" --network bsc_testnet
+
+npx hardhat test --grep "ONFTAdapterTests @hedera @approve" --network hedera_testnet
+npx hardhat test --grep "ONFTAdapterTests @bsc @approve" --network bsc_testnet
+
+npx hardhat test --grep "ONFTAdapterTests @hedera @send" --network hedera_testnet
+npx hardhat test --grep "ONFTAdapterTests @bsc @send" --network bsc_testnet
+
+wait a couple minutes, the LZ progress can be tracked on https://testnet.layerzeroscan.com/tx/<tx_hash>
+
+npx hardhat test --grep "ONFTAdapterTests @hedera @test" --network hedera_testnet
+npx hardhat test --grep "ONFTAdapterTests @bsc @test" --network bsc_testnet
+
+### HTS Connector
+
+npx hardhat deploy-hts-connector --network hedera_testnet
+npx hardhat deploy-oft --decimals 8 --mint 1000 --network bsc_testnet
+
+npx hardhat set-peer --source <hedera_oft_address> --target <bsc_oft_address> --network hedera_testnet
+npx hardhat set-peer --source <bsc_oft_address> --target <hedera_oft_address> --network bsc_testnet
+
+fill the .env
+
+npx hardhat test --grep "HTSConnectorTests @hedera @approve" --network hedera_testnet
+
+npx hardhat test --grep "HTSConnectorTests @hedera @send" --network hedera_testnet
+npx hardhat test --grep "HTSConnectorTests @bsc @send" --network bsc_testnet
+
+wait a couple minutes, the LZ progress can be tracked on https://testnet.layerzeroscan.com/tx/<tx_hash>
+
+npx hardhat test --grep "HTSConnectorTests @hedera @test" --network hedera_testnet
+npx hardhat test --grep "HTSConnectorTests @bsc @test" --network bsc_testnet
+
+### HTS Adapter
+
+npx hardhat create-hts-token --network hedera_testnet
+npx hardhat deploy-erc20 --decimals 8 --mint 1000 --network bsc_testnet
+
+npx hardhat deploy-oft-adapter --token <erc20_hedera_address> --network hedera_testnet
+npx hardhat deploy-oft-adapter --token <erc20_bsc_address> --network bsc_testnet
+
+npx hardhat set-peer --source <hedera_oft_adapter_address> --target <bsc_oft_adapter_address> --network hedera_testnet
+npx hardhat set-peer --source <bsc_oft_adapter_address> --target <hedera_oft_adapter_address> --network bsc_testnet
+
+fill the .env
+
+npx hardhat test --grep "HTSAdapterTests @hedera @fund-and-approve" --network hedera_testnet
+npx hardhat test --grep "HTSAdapterTests @bsc @fund-and-approve" --network bsc_testnet
+
+npx hardhat test --grep "HTSAdapterTests @hedera @send" --network hedera_testnet
+npx hardhat test --grep "HTSAdapterTests @bsc @send" --network bsc_testnet
+
+wait a couple minutes, the LZ progress can be tracked on https://testnet.layerzeroscan.com/tx/<tx_hash>
+
+npx hardhat test --grep "HTSAdapterTests @hedera @test" --network hedera_testnet
+npx hardhat test --grep "HTSAdapterTests @bsc @test" --network bsc_testnet
+
+### WHBAR flow
+
+npx hardhat deploy-whbar --network hedera_testnet
+npx hardhat deploy-erc20 --decimals 8 --mint 100000000 --network bsc_testnet
+
+npx hardhat deploy-oft-adapter --token <whbar_hedera_address> --network hedera_testnet
+npx hardhat deploy-oft-adapter --token <erc20_bsc_address> --network bsc_testnet
+
+npx hardhat set-peer --source <hedera_oft_adapter_address> --target <bsc_oft_adapter_address> --network hedera_testnet
+npx hardhat set-peer --source <bsc_oft_adapter_address> --target <hedera_oft_adapter_address> --network bsc_testnet
+
+fill the .env
+
+npx hardhat test --grep "WHBARTests @hedera @deposit" --network hedera_testnet
+
+npx hardhat test --grep "WHBARTests @hedera @fund-and-approve" --network hedera_testnet
+npx hardhat test --grep "WHBARTests @bsc @fund-and-approve" --network bsc_testnet
+
+npx hardhat test --grep "WHBARTests @hedera @send" --network hedera_testnet
+npx hardhat test --grep "WHBARTests @bsc @send" --network bsc_testnet
+
+npx hardhat test --grep "WHBARTests @hedera @test" --network hedera_testnet
+npx hardhat test --grep "WHBARTests @bsc @test" --network bsc_testnet

tools/layer-zero-example/contracts/CreateHTS.sol

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+// SPDX-License-Identifier: Apache-2.0
+pragma solidity ^0.8.20;
+
+import "@openzeppelin/contracts/access/Ownable.sol";
+import "./hts/HederaTokenService.sol";
+import "./hts/IHederaTokenService.sol";
+import "./hts/KeyHelper.sol";
+import "./hts/ExpiryHelper.sol";
+
+contract CreateHTS is Ownable, KeyHelper, ExpiryHelper, HederaTokenService {
+    address public htsTokenAddress;
+
+    constructor(string memory _name, string memory _symbol, address _delegate) payable Ownable(_delegate) {
+        IHederaTokenService.TokenKey[] memory keys = new IHederaTokenService.TokenKey[](2);
+        keys[0] = getSingleKey(
+            KeyType.ADMIN,
+            KeyType.PAUSE,
+            KeyValueType.INHERIT_ACCOUNT_KEY,
+            bytes("")
+        );
+        keys[1] = getSingleKey(
+            KeyType.SUPPLY,
+            KeyValueType.INHERIT_ACCOUNT_KEY,
+            bytes("")
+        );
+
+        IHederaTokenService.Expiry memory expiry = IHederaTokenService.Expiry(0, address(this), 8000000);
+        IHederaTokenService.HederaToken memory token = IHederaTokenService.HederaToken(
+            _name, _symbol, address(this), "memo", true, 5000, false, keys, expiry
+        );
+
+        (int responseCode, address tokenAddress) = HederaTokenService.createFungibleToken(
+            token, 1000, int32(int256(uint256(8)))
+        );
+        require(responseCode == HederaResponseCodes.SUCCESS, "Failed to create HTS token");
+
+        int256 transferResponse = HederaTokenService.transferToken(tokenAddress, address(this), msg.sender, 1000);
+        require(transferResponse == HederaResponseCodes.SUCCESS, "HTS: Transfer failed");
+
+        htsTokenAddress = tokenAddress;
+    }
+}

tools/layer-zero-example/contracts/ERC20Mock.sol

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+// SPDX-License-Identifier: Apache-2.0
+pragma solidity ^0.8.22;
+
+import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract ERC20Mock is ERC20 {
+    uint8 decimalsArg = 18;
+
+    constructor(uint256 _initialMint, uint8 _decimals) ERC20("ERC20Mock", "E20M") {
+        _mint(msg.sender, _initialMint);
+        decimalsArg = _decimals;
+    }
+
+    function decimals() public view override returns (uint8) {
+        return decimalsArg;
+    }
+}

tools/layer-zero-example/contracts/ERC721Mock.sol

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+// SPDX-License-Identifier: Apache-2.0
+pragma solidity ^0.8.22;
+
+import {ERC721} from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
+
+contract ERC721Mock is ERC721 {
+    constructor() ERC721("ERC721Mock", "E721M") {}
+
+    function mint(address _to, uint256 _tokenId) external {
+        _mint(_to, _tokenId);
+    }
+}

tools/layer-zero-example/contracts/ExampleHTSConnector.sol

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+// SPDX-License-Identifier: Apache-2.0
+pragma solidity ^0.8.0;
+
+import "@openzeppelin/contracts/access/Ownable.sol";
+import "./hts/HederaTokenService.sol";
+import "./hts/IHederaTokenService.sol";
+import "./hts/KeyHelper.sol";
+import "./hts/ExpiryHelper.sol";
+import "./HTSConnector.sol";
+
+contract ExampleHTSConnector is Ownable, HTSConnector {
+    constructor(
+        string memory _name,
+        string memory _symbol,
+        address _lzEndpoint,
+        address _delegate
+    ) payable HTSConnector(_name, _symbol, _lzEndpoint, _delegate) Ownable(_delegate) {}
+}