55 lines
2.3 KiB
Solidity
55 lines
2.3 KiB
Solidity
// 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 TwoHopDodoIntegrationUnwinder
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* @notice Unwind `tokenIn -> midToken` on `poolA`, then `midToken -> tokenOut` on `poolB`, both via the same DODO PMM integration.
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* @dev `data` = abi.encode(address poolA, address poolB, address midToken, uint256 minMidOut).
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* Use for Mainnet when there is no Uniswap V3 route for cWUSDC/USDC but there *is* depth on
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* cWUSDC/cWUSDT and a second PMM pool cWUSDT/USDC (sizes must fit the second pool).
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*/
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contract TwoHopDodoIntegrationUnwinder {
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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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if (integration_ == address(0)) revert BadParams();
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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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(address poolA, address poolB, address midToken, uint256 minMidOut) =
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abi.decode(data, (address, address, address, uint256));
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if (poolA == address(0) || poolB == address(0) || midToken == address(0)) revert BadParams();
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if (midToken == tokenIn || midToken == tokenOut) 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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uint256 midOut = IDODOIntegrationSwapExactIn(integration).swapExactIn(poolA, tokenIn, amountIn, minMidOut);
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if (midOut == 0) revert BadParams();
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IERC20(midToken).forceApprove(integration, midOut);
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amountOut = IDODOIntegrationSwapExactIn(integration).swapExactIn(poolB, midToken, midOut, minAmountOut);
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IERC20(tokenOut).safeTransfer(msg.sender, amountOut);
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}
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}
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