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
73 lines
2.6 KiB
Solidity
73 lines
2.6 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 IDODOStyleSwapExactIn {
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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 SwapFlashWorkflowBorrower
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* @notice ERC-3156 borrower: flash `token` → swap to `midToken` → swap back to `token` → repay `amount + fee`.
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* @dev `data` must be `abi.encode(SwapFlashParams)`. The caller chooses `integration` — use only trusted DODO/PMM routers.
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* `pool` is typically the same for both legs (e.g. cUSDT/USDT round-trip). Set mins from off-chain quotes.
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*/
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contract SwapFlashWorkflowBorrower 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 SwapFlashParams {
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address integration;
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address pool;
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address midToken;
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uint256 minOutFirst;
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uint256 minOutSecond;
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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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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 token,
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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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SwapFlashParams memory p = abi.decode(data, (SwapFlashParams));
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if (p.integration == address(0) || p.pool == address(0) || p.midToken == address(0)) revert BadParams();
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if (p.midToken == token) revert BadParams();
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IERC20 borrowed = IERC20(token);
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IERC20 mid = IERC20(p.midToken);
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borrowed.forceApprove(p.integration, amount);
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IDODOStyleSwapExactIn(p.integration).swapExactIn(p.pool, token, amount, p.minOutFirst);
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uint256 midBal = mid.balanceOf(address(this));
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mid.forceApprove(p.integration, midBal);
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IDODOStyleSwapExactIn(p.integration).swapExactIn(p.pool, p.midToken, midBal, p.minOutSecond);
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uint256 need = amount + fee;
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if (borrowed.balanceOf(address(this)) < need) revert InsufficientToRepay();
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borrowed.safeTransfer(msg.sender, need);
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return _RETURN_VALUE;
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}
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}
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