45 lines
1.6 KiB
Solidity
45 lines
1.6 KiB
Solidity
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.20;
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import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
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import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
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interface IDODOIntegrationSwapExactIn {
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function swapExactIn(address pool, address tokenIn, uint256 amountIn, uint256 minAmountOut)
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external
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returns (uint256 amountOut);
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}
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/**
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* @title DODOIntegrationExternalUnwinder
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* @notice Unwinds base -> quote through a DODO PMM integration.
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* @dev `data` must be `abi.encode(address pool)` selecting the registered pool to use.
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*/
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contract DODOIntegrationExternalUnwinder {
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using SafeERC20 for IERC20;
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address public immutable integration;
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error BadParams();
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constructor(address integration_) {
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integration = integration_;
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}
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function unwind(address tokenIn, address tokenOut, uint256 amountIn, uint256 minAmountOut, bytes calldata data)
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external
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returns (uint256 amountOut)
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{
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if (tokenIn == address(0) || tokenOut == address(0) || tokenIn == tokenOut || amountIn == 0) revert BadParams();
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if (data.length != 32) revert BadParams();
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address pool = abi.decode(data, (address));
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if (pool == address(0)) revert BadParams();
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IERC20(tokenIn).safeTransferFrom(msg.sender, address(this), amountIn);
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IERC20(tokenIn).forceApprove(integration, amountIn);
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amountOut = IDODOIntegrationSwapExactIn(integration).swapExactIn(pool, tokenIn, amountIn, minAmountOut);
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IERC20(tokenOut).safeTransfer(msg.sender, amountOut);
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}
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}
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