76aa419320
- CCIP/trustless bridge contracts, GRU tokens, DEX/PMM tests, reserve vault. - Token-aggregation service routes, planner, chain config, relay env templates. - Config snapshots and multi-chain deployment markdown updates. - gitignore services/btc-intake/dist/ (tsc output); do not track dist. Run forge build && forge test before deploy (large solc graph). Made-with: Cursor
102 lines
3.7 KiB
Solidity
102 lines
3.7 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.20;
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import {IERC3156FlashBorrower} from "@openzeppelin/contracts/interfaces/IERC3156FlashBorrower.sol";
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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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/// @dev Matches `DODOPMMIntegration.swapExactIn` surface (any registered pool).
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interface IDODOQuotePushSwapExactIn {
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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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/// @dev Minimal external unwind interface for converting PMM base back into flash-borrowed quote.
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interface IExternalUnwinder {
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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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/**
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* @title QuotePushFlashWorkflowBorrower
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* @notice ERC-3156 borrower for a quote-push loop:
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* flash `quoteToken` -> buy `baseToken` from a DODO-style PMM -> unwind externally back into `quoteToken`
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* -> repay `amount + fee`, leaving any quote surplus on this contract.
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* @dev `data` must be `abi.encode(QuotePushParams)`. The caller is responsible for choosing trusted integrations,
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* setting conservative minimums, and sweeping any retained surplus from this contract after execution.
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*/
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contract QuotePushFlashWorkflowBorrower is IERC3156FlashBorrower {
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using SafeERC20 for IERC20;
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bytes32 private constant _RETURN_VALUE = keccak256("ERC3156FlashBorrower.onFlashLoan");
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address public immutable trustedLender;
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struct QuotePushParams {
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address integration;
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address pool;
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address baseToken;
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address externalUnwinder;
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uint256 minOutPmm;
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uint256 minOutUnwind;
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bytes unwindData;
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}
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error UntrustedLender();
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error BadParams();
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error InsufficientToRepay();
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event QuotePushExecuted(
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address indexed quoteToken,
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address indexed baseToken,
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uint256 borrowedAmount,
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uint256 fee,
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uint256 baseOut,
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uint256 unwindOut,
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uint256 surplus
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);
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constructor(address trustedLender_) {
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trustedLender = trustedLender_;
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}
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function onFlashLoan(
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address,
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address quoteToken,
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uint256 amount,
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uint256 fee,
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bytes calldata data
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) external override returns (bytes32) {
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if (msg.sender != trustedLender) revert UntrustedLender();
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QuotePushParams memory p = abi.decode(data, (QuotePushParams));
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if (
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p.integration == address(0) || p.pool == address(0) || p.baseToken == address(0)
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|| p.externalUnwinder == address(0)
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) revert BadParams();
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if (p.baseToken == quoteToken) revert BadParams();
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IERC20 borrowed = IERC20(quoteToken);
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IERC20 base = IERC20(p.baseToken);
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borrowed.forceApprove(p.integration, amount);
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uint256 baseOut = IDODOQuotePushSwapExactIn(p.integration).swapExactIn(p.pool, quoteToken, amount, p.minOutPmm);
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uint256 baseBal = base.balanceOf(address(this));
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base.forceApprove(p.externalUnwinder, baseBal);
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uint256 unwindOut =
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IExternalUnwinder(p.externalUnwinder).unwind(p.baseToken, quoteToken, baseBal, p.minOutUnwind, p.unwindData);
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uint256 need = amount + fee;
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uint256 quoteBal = borrowed.balanceOf(address(this));
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if (quoteBal < need) revert InsufficientToRepay();
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uint256 surplus = quoteBal - need;
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borrowed.safeTransfer(msg.sender, need);
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emit QuotePushExecuted(quoteToken, p.baseToken, amount, fee, baseOut, unwindOut, surplus);
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return _RETURN_VALUE;
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}
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}
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