84 lines
2.4 KiB
Solidity
84 lines
2.4 KiB
Solidity
// SPDX-License-Identifier: UNLICENSED
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pragma solidity ^0.8.26;
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import "@interfaces/IExecutor.sol";
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import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
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import "@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol";
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error UniswapV3Executor__InvalidDataLength();
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contract UniswapV3Executor is IExecutor {
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uint160 private constant MIN_SQRT_RATIO = 4295128739;
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uint160 private constant MAX_SQRT_RATIO =
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1461446703485210103287273052203988822378723970342;
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// slither-disable-next-line locked-ether
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function swap(uint256 amountIn, bytes calldata data)
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external
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payable
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returns (uint256 amountOut)
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{
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(
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address tokenIn,
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address tokenOut,
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uint24 fee,
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address receiver,
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address target,
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bool zeroForOne
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) = _decodeData(data);
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int256 amount0;
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int256 amount1;
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IUniswapV3Pool pool = IUniswapV3Pool(target);
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bytes memory callbackData = _makeV3CallbackData(tokenIn, tokenOut, fee);
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{
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(amount0, amount1) = pool.swap(
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receiver,
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zeroForOne,
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// positive means exactIn
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int256(amountIn),
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zeroForOne ? MIN_SQRT_RATIO + 1 : MAX_SQRT_RATIO - 1,
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callbackData
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);
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}
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if (zeroForOne) {
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amountOut = amount1 > 0 ? uint256(amount1) : uint256(-amount1);
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} else {
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amountOut = amount0 > 0 ? uint256(amount0) : uint256(-amount0);
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}
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}
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function _decodeData(bytes calldata data)
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internal
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pure
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returns (
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address tokenIn,
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address tokenOut,
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uint24 fee,
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address receiver,
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address target,
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bool zeroForOne
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)
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{
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if (data.length != 84) {
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revert UniswapV3Executor__InvalidDataLength();
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}
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tokenIn = address(bytes20(data[0:20]));
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tokenOut = address(bytes20(data[20:40]));
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fee = uint24(bytes3(data[40:43]));
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receiver = address(bytes20(data[43:63]));
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target = address(bytes20(data[63:83]));
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zeroForOne = uint8(data[83]) > 0;
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}
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function _makeV3CallbackData(address tokenIn, address tokenOut, uint24 fee)
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internal
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pure
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returns (bytes memory)
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{
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return abi.encodePacked(tokenIn, tokenOut, fee);
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}
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}
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