Merge pull request iotubeproject#276 from iotubeproject/unwrapper_for…

…_usdc usdc unwrapper
chaishiqi · Nov 7, 2024 · 43e03f9 · 43e03f9
2 parents d7bdde5 + 629f38e
commit 43e03f9
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diff --git a/contracts/iotube/USDCSwapper.sol → contracts/USDCSwapper.sol b/contracts/iotube/USDCSwapper.sol → contracts/USDCSwapper.sol
diff --git a/contracts/USDCUnwrapper.sol b/contracts/USDCUnwrapper.sol
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: MIT
+pragma solidity = 0.8.20;
+
+interface IERC20 {
+    function transfer(address to, uint256 value) external returns (bool);
+    function approve(address spender, uint256 value) external returns (bool);
+}
+
+interface ISwapper {
+    function usdc_e() external view returns (address);
+    function iousdc() external view returns (address);
+
+    function deposit(uint256 _amount) external;
+}
+
+contract USDCUnwrapper {
+    IERC20 public iousdc;
+    IERC20 public usdc_e;
+    ISwapper public swapper;
+
+    constructor(ISwapper _swapper) {
+        swapper = _swapper;
+        iousdc = IERC20(_swapper.iousdc());
+        usdc_e = IERC20(_swapper.usdc_e());
+    }
+
+    function onReceive(address _sender, address _token, uint256 _amount, bytes calldata _payload) external {
+        require(_token == address(iousdc), "USDCUnwrapper: invalid token");
+        address recipient = _sender;
+        if (_payload.length == 32) {
+            (recipient) = abi.decode(_payload, (address));
+        }
+        require(iousdc.approve(address(swapper), _amount), "USDCUnwrapper: approve failed");
+        swapper.deposit(_amount);
+        require(usdc_e.transfer(recipient, _amount), "USDCUnwrapper: transfer failed");
+    }
+}