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Merge pull request argentlabs#252 from argentlabs/paraswap-uniV3
Paraswap UniV3 Filters
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contracts/infrastructure/dapp/paraswap/UniswapV3RouterFilter.sol
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| // Copyright (C) 2021 Argent Labs Ltd. <https://argent.xyz> | ||
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| // This program is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
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| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
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| // You should have received a copy of the GNU General Public License | ||
| // along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
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| // SPDX-License-Identifier: GPL-3.0-only | ||
| pragma solidity ^0.8.3; | ||
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| import "../BaseFilter.sol"; | ||
| import "./ParaswapUtils.sol"; | ||
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| /** | ||
| * @title UniswapV3RouterFilter | ||
| * @notice Filter used for calls to UniswapV3 router (aka "SwapRouter"). | ||
| SwapRouter is deployed at 0xE592427A0AEce92De3Edee1F18E0157C05861564 | ||
| * @author Olivier VDB - <olivier@argent.xyz> | ||
| */ | ||
| contract UniswapV3RouterFilter is BaseFilter { | ||
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| bytes4 private constant SELL_SINGLE = bytes4(keccak256("exactInputSingle((address,address,uint24,address,uint256,uint256,uint256,uint160))")); | ||
| bytes4 private constant ERC20_APPROVE = bytes4(keccak256("approve(address,uint256)")); | ||
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| // The token registry | ||
| address public immutable tokenRegistry; | ||
| // The UniV3 factory | ||
| address public immutable factory; | ||
| // The UniV3 pool initCode | ||
| bytes32 public immutable initCode; | ||
| // The WETH address | ||
| address public immutable weth; | ||
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| constructor(address _tokenRegistry, address _factory, bytes32 _initCode, address _weth) { | ||
| tokenRegistry = _tokenRegistry; | ||
| factory = _factory; | ||
| initCode = _initCode; | ||
| weth = _weth; | ||
| } | ||
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| function isValid(address _wallet, address _spender, address _to, bytes calldata _data) external view override returns (bool valid) { | ||
| // disable ETH transfer | ||
| if (_data.length < 4) { | ||
| return false; | ||
| } | ||
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| bytes4 methodId = getMethod(_data); | ||
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| if(methodId == SELL_SINGLE) { | ||
| (address tokenFrom, address tokenTo, uint24 fee, address recipient) = abi.decode(_data[4:], (address, address, uint24, address)); | ||
| return ParaswapUtils.hasValidUniV3Pool(tokenFrom, tokenTo, fee, tokenRegistry, factory, initCode, weth) && recipient == _wallet; | ||
| } | ||
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| return methodId == ERC20_APPROVE && _spender != _to; | ||
| } | ||
| } |
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| pragma solidity 0.7.5; | ||
| pragma abicoder v2; | ||
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| interface ISwapRouterUniV3 { | ||
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| struct ExactInputSingleParams { | ||
| address tokenIn; | ||
| address tokenOut; | ||
| uint24 fee; | ||
| address recipient; | ||
| uint256 deadline; | ||
| uint256 amountIn; | ||
| uint256 amountOutMinimum; | ||
| uint160 sqrtPriceLimitX96; | ||
| } | ||
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| struct ExactOutputSingleParams { | ||
| address tokenIn; | ||
| address tokenOut; | ||
| uint24 fee; | ||
| address recipient; | ||
| uint256 deadline; | ||
| uint256 amountOut; | ||
| uint256 amountInMaximum; | ||
| uint160 sqrtPriceLimitX96; | ||
| } | ||
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| function exactInputSingle(ExactInputSingleParams calldata params) | ||
| external payable | ||
| returns (uint256 amountOut); | ||
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| function exactOutputSingle(ExactOutputSingleParams calldata params) | ||
| external payable returns (uint256 amountIn); | ||
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| } |
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