chore: Rename Uniswapv2SwapExecutor to UniswapV2Executor

--- don't change below this line --- ENG-4033 Took 4 minutes
2025-01-24 16:46:56 +00:00
parent ed44f4e993
commit b3241804c6
3 changed files with 9 additions and 13 deletions
--- a/foundry/src/executors/UniswapV2Executor.sol
+++ b/foundry/src/executors/UniswapV2Executor.sol
@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+import "@uniswap-v2/contracts/interfaces/IUniswapV2Pair.sol";
+import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
+import {IExecutor} from "../interfaces/IExecutor.sol";
+
+error UniswapV2Executor__InvalidDataLength();
+
+contract UniswapV2Executor is IExecutor {
+    using SafeERC20 for IERC20;
+
+    function swap(uint256 givenAmount, bytes calldata data)
+        external
+        returns (uint256 calculatedAmount)
+    {
+        address target;
+        address receiver;
+        bool zeroForOne;
+        IERC20 tokenIn;
+
+        (tokenIn, target, receiver, zeroForOne) = _decodeData(data);
+        calculatedAmount = _getAmountOut(target, givenAmount, zeroForOne);
+        tokenIn.safeTransfer(target, givenAmount);
+
+        IUniswapV2Pair pool = IUniswapV2Pair(target);
+        if (zeroForOne) {
+            pool.swap(0, calculatedAmount, receiver, "");
+        } else {
+            pool.swap(calculatedAmount, 0, receiver, "");
+        }
+    }
+
+    function _decodeData(bytes calldata data)
+        internal
+        pure
+        returns (
+            IERC20 inToken,
+            address target,
+            address receiver,
+            bool zeroForOne
+        )
+    {
+        if (data.length != 61) {
+            revert UniswapV2Executor__InvalidDataLength();
+        }
+        inToken = IERC20(address(bytes20(data[0:20])));
+        target = address(bytes20(data[20:40]));
+        receiver = address(bytes20(data[40:60]));
+        zeroForOne = uint8(data[60]) > 0;
+    }
+
+    function _getAmountOut(address target, uint256 amountIn, bool zeroForOne)
+        internal
+        view
+        returns (uint256 amount)
+    {
+        IUniswapV2Pair pair = IUniswapV2Pair(target);
+        uint112 reserveIn;
+        uint112 reserveOut;
+        if (zeroForOne) {
+            // slither-disable-next-line unused-return
+            (reserveIn, reserveOut,) = pair.getReserves();
+        } else {
+            // slither-disable-next-line unused-return
+            (reserveOut, reserveIn,) = pair.getReserves();
+        }
+
+        require(reserveIn > 0 && reserveOut > 0, "L");
+        uint256 amountInWithFee = amountIn * 997;
+        uint256 numerator = amountInWithFee * uint256(reserveOut);
+        uint256 denominator = (uint256(reserveIn) * 1000) + amountInWithFee;
+        amount = numerator / denominator;
+    }
+}