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| // SPDX-License-Identifier: BUSL-1.1 | ||
| // Gearbox Protocol. Generalized leverage for DeFi protocols | ||
| // (c) Gearbox Foundation, 2024 | ||
| pragma solidity ^0.8.10; | ||
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| import {AbstractLiquidator, LiquidationResult, IntermediateData} from "./AbstractLiquidator.sol"; | ||
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| import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; | ||
| import {SafeERC20} from "@1inch/solidity-utils/contracts/libraries/SafeERC20.sol"; | ||
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| import {AaveFLTaker} from "./AaveFLTaker.sol"; | ||
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| contract AaveLiquidator is AbstractLiquidator { | ||
| using SafeERC20 for IERC20; | ||
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| address public immutable aavePool; | ||
| address public immutable aaveFLTaker; | ||
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| modifier onlyAave() { | ||
| if (msg.sender != aavePool) revert("Caller not Aave pool"); | ||
| _; | ||
| } | ||
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| constructor(address _router, address _plb, address _aavePool, address _aaveFLTaker) | ||
| AbstractLiquidator(_router, _plb) | ||
| { | ||
| aavePool = _aavePool; | ||
| aaveFLTaker = _aaveFLTaker; | ||
| } | ||
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| function _takeFlashLoan(address underlying, uint256 amount, bytes memory data) internal virtual override { | ||
| AaveFLTaker(aaveFLTaker).takeFlashLoan(underlying, amount, data); | ||
| } | ||
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| function executeOperation( | ||
| address[] memory assets, | ||
| uint256[] memory amounts, | ||
| uint256[] memory premiums, | ||
| address initiator, | ||
| bytes calldata params | ||
| ) external onlyAave returns (bool) { | ||
| if (initiator != aaveFLTaker) revert("Flash loan initiator is not FLTaker"); | ||
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| IntermediateData memory intData = abi.decode(params, (IntermediateData)); | ||
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| _processFlashLoan(assets[0], amounts[0], premiums[0], intData); | ||
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| IERC20(assets[0]).forceApprove(aavePool, amounts[0] + premiums[0]); | ||
| return true; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,35 @@ | ||
| pragma solidity ^0.8.17; | ||
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| import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol"; | ||
| import {IGhoFlashMinter} from "./interfaces/IGhoFlashMinter.sol"; | ||
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| contract GhoFMTaker is Ownable { | ||
| event SetAllowedFMReceiver(address indexed consumer, bool status); | ||
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| error CallerNotAllowedReceiverException(); | ||
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| address public immutable ghoFlashMinter; | ||
| address public immutable gho; | ||
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| mapping(address => bool) public allowedFMReceiver; | ||
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| modifier onlyAllowedFMReceiver() { | ||
| if (!allowedFMReceiver[msg.sender]) revert CallerNotAllowedReceiverException(); | ||
| _; | ||
| } | ||
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| constructor(address _ghoFlashMinter, address _gho) { | ||
| ghoFlashMinter = _ghoFlashMinter; | ||
| gho = _gho; | ||
| } | ||
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| function takeFlashMint(uint256 amount, bytes memory data) external onlyAllowedFMReceiver { | ||
| IGhoFlashMinter(ghoFlashMinter).flashLoan(msg.sender, gho, amount, data); | ||
| } | ||
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| function setAllowedFMReceiver(address receiver, bool status) external onlyOwner { | ||
| if (allowedFMReceiver[receiver] == status) return; | ||
| allowedFMReceiver[receiver] = status; | ||
| emit SetAllowedFMReceiver(receiver, status); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| // SPDX-License-Identifier: BUSL-1.1 | ||
| // Gearbox Protocol. Generalized leverage for DeFi protocols | ||
| // (c) Gearbox Foundation, 2024 | ||
| pragma solidity ^0.8.10; | ||
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| import {AbstractLiquidator, LiquidationResult, IntermediateData} from "./AbstractLiquidator.sol"; | ||
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| import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; | ||
| import {SafeERC20} from "@1inch/solidity-utils/contracts/libraries/SafeERC20.sol"; | ||
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| import {GhoFMTaker} from "./GhoFMTaker.sol"; | ||
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| contract GhoLiquidator is AbstractLiquidator { | ||
| using SafeERC20 for IERC20; | ||
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| bytes32 public constant CALLBACK_SUCCESS = keccak256("ERC3156FlashBorrower.onFlashLoan"); | ||
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| address public immutable ghoFlashMinter; | ||
| address public immutable ghoFMTaker; | ||
| address public immutable gho; | ||
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| modifier onlyGhoFlashMinter() { | ||
| if (msg.sender != ghoFlashMinter) revert("Caller not GHO flash minter"); | ||
| _; | ||
| } | ||
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| constructor(address _router, address _plb, address _ghoFlashMinter, address _ghoFMTaker, address _gho) | ||
| AbstractLiquidator(_router, _plb) | ||
| { | ||
| ghoFlashMinter = _ghoFlashMinter; | ||
| ghoFMTaker = _ghoFMTaker; | ||
| gho = _gho; | ||
| } | ||
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| function _takeFlashLoan(address, uint256 amount, bytes memory data) internal virtual override { | ||
| GhoFMTaker(ghoFMTaker).takeFlashMint(amount, data); | ||
| } | ||
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| function onFlashLoan(address initiator, address token, uint256 amount, uint256 fee, bytes calldata data) | ||
| external | ||
| onlyGhoFlashMinter | ||
| returns (bytes32) | ||
| { | ||
| if (initiator != ghoFMTaker) revert("Flash loan initiator is not FMTaker"); | ||
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| IntermediateData memory intData = abi.decode(data, (IntermediateData)); | ||
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| _processFlashLoan(token, amount, fee, intData); | ||
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| IERC20(token).forceApprove(ghoFlashMinter, amount + fee); | ||
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| return CALLBACK_SUCCESS; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| // SPDX-License-Identifier: BUSL-1.1 | ||
| // Gearbox Protocol. Generalized leverage for DeFi protocols | ||
| // (c) Gearbox Foundation, 2024 | ||
| pragma solidity ^0.8.10; | ||
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| interface IGhoFlashMinter { | ||
| function flashLoan(address receiver, address token, uint256 amount, bytes calldata data) external returns (bool); | ||
| } |
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