feat: withdrawerc20

packages/zevm-app-contracts/contracts/withdrawErc20/withdrawErc20.sol

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.7;
+
+import "@zetachain/protocol-contracts/contracts/zevm/SystemContract.sol";
+import "@zetachain/toolkit/contracts/SwapHelperLib.sol";
+
+contract WithdrawERC20 {
+    SystemContract public immutable systemContract;
+
+    constructor(address systemContractAddress) {
+        systemContract = SystemContract(systemContractAddress);
+    }
+
+    function withdraw(address zrc20, uint256 amount, bytes memory to) external virtual {
+        IZRC20(zrc20).transferFrom(msg.sender, address(this), amount);
+
+        (address gasZRC20, uint256 gasFee) = IZRC20(zrc20).withdrawGasFee();
+
+        uint256 inputForGas = SwapHelperLib.swapTokensForExactTokens(
+            systemContract.wZetaContractAddress(),
+            systemContract.uniswapv2FactoryAddress(),
+            systemContract.uniswapv2Router02Address(),
+            zrc20,
+            gasFee,
+            gasZRC20,
+            amount
+        );
+
+        IZRC20(gasZRC20).approve(zrc20, gasFee);
+        IZRC20(zrc20).withdraw(to, amount - inputForGas);
+    }
+}