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Merge pull request #334 from alpaca-finance/feat/path-config-global
[main][feat] add path v3 as global config
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solidity/contracts/money-market/PancakeswapV3IbTokenLiquidationStrategy_WithPathReader.sol
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,126 @@ | ||
| // SPDX-License-Identifier: BUSL | ||
| pragma solidity 0.8.19; | ||
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| // ---- External Libraries ---- // | ||
| import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; | ||
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| // ---- Libraries ---- // | ||
| import { LibSafeToken } from "./libraries/LibSafeToken.sol"; | ||
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| // ---- Interfaces ---- // | ||
| import { ILiquidationStrategy } from "./interfaces/ILiquidationStrategy.sol"; | ||
| import { IPancakeSwapRouterV3 } from "./interfaces/IPancakeSwapRouterV3.sol"; | ||
| import { IERC20 } from "./interfaces/IERC20.sol"; | ||
| import { IMoneyMarket } from "./interfaces/IMoneyMarket.sol"; | ||
| import { IUniSwapV3PathReader } from "../reader/interfaces/IUniSwapV3PathReader.sol"; | ||
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| contract PancakeswapV3IbTokenLiquidationStrategy_WithPathReader is ILiquidationStrategy, Ownable { | ||
| using LibSafeToken for IERC20; | ||
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| event LogSetCaller(address _caller, bool _isOk); | ||
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| error PancakeswapV3IbTokenLiquidationStrategy_Unauthorized(); | ||
| error PancakeswapV3IbTokenLiquidationStrategy_RepayTokenIsSameWithUnderlyingToken(); | ||
| error PancakeswapV3IbTokenLiquidationStrategy_PathConfigNotFound(address tokenIn, address tokenOut); | ||
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| IPancakeSwapRouterV3 internal immutable router; | ||
| IMoneyMarket internal immutable moneyMarket; | ||
| IUniSwapV3PathReader internal immutable pathReader; | ||
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| mapping(address => bool) public callersOk; | ||
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| struct WithdrawParam { | ||
| address to; | ||
| address token; | ||
| uint256 amount; | ||
| } | ||
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| /// @notice allow only whitelisted callers | ||
| modifier onlyWhitelistedCallers() { | ||
| if (!callersOk[msg.sender]) { | ||
| revert PancakeswapV3IbTokenLiquidationStrategy_Unauthorized(); | ||
| } | ||
| _; | ||
| } | ||
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| constructor( | ||
| address _router, | ||
| address _moneyMarket, | ||
| address _pathReader | ||
| ) { | ||
| router = IPancakeSwapRouterV3(_router); | ||
| moneyMarket = IMoneyMarket(_moneyMarket); | ||
| pathReader = IUniSwapV3PathReader(_pathReader); | ||
| } | ||
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| /// @notice Execute liquidate from collatToken to repayToken | ||
| /// @param _ibToken The source token | ||
| /// @param _repayToken The destination token | ||
| /// @param _ibTokenAmountIn Available amount of source token to trade | ||
| /// @param _minReceive Min token receive after swap | ||
| function executeLiquidation( | ||
| address _ibToken, | ||
| address _repayToken, | ||
| uint256 _ibTokenAmountIn, | ||
| uint256, /*_repayAmount*/ | ||
| uint256 _minReceive | ||
| ) external onlyWhitelistedCallers { | ||
| // get underlying tokenAddress from MoneyMarket | ||
| address _underlyingToken = moneyMarket.getTokenFromIbToken(_ibToken); | ||
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| // Revert if _underlyingToken and _repayToken are the same address | ||
| if (_underlyingToken == _repayToken) { | ||
| revert PancakeswapV3IbTokenLiquidationStrategy_RepayTokenIsSameWithUnderlyingToken(); | ||
| } | ||
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| bytes memory _path = pathReader.paths(_underlyingToken, _repayToken); | ||
| // Revert if no swapPath config for _underlyingToken and _repayToken pair | ||
| if (_path.length == 0) { | ||
| revert PancakeswapV3IbTokenLiquidationStrategy_PathConfigNotFound(_underlyingToken, _repayToken); | ||
| } | ||
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| // withdraw ibToken from Moneymarket for underlyingToken | ||
| uint256 _withdrawnUnderlyingAmount = moneyMarket.withdraw(msg.sender, _ibToken, _ibTokenAmountIn); | ||
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| // setup params from swap | ||
| IPancakeSwapRouterV3.ExactInputParams memory params = IPancakeSwapRouterV3.ExactInputParams({ | ||
| path: _path, | ||
| recipient: msg.sender, | ||
| deadline: block.timestamp, | ||
| amountIn: _withdrawnUnderlyingAmount, | ||
| amountOutMinimum: _minReceive | ||
| }); | ||
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| // approve router for swapping | ||
| IERC20(_underlyingToken).safeApprove(address(router), _withdrawnUnderlyingAmount); | ||
| // swap all ib's underlyingToken to repayToken | ||
| router.exactInput(params); | ||
| } | ||
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| /// @notice Set callers ok | ||
| /// @param _callers A list of caller addresses | ||
| /// @param _isOk An ok flag | ||
| function setCallersOk(address[] calldata _callers, bool _isOk) external onlyOwner { | ||
| uint256 _length = _callers.length; | ||
| for (uint256 _i; _i < _length; ) { | ||
| callersOk[_callers[_i]] = _isOk; | ||
| emit LogSetCaller(_callers[_i], _isOk); | ||
| unchecked { | ||
| ++_i; | ||
| } | ||
| } | ||
| } | ||
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| /// @notice Withdraw ERC20 from this contract | ||
| /// @param _withdrawParams an array of Withdrawal parameters (to, token, amount) | ||
| function withdraw(WithdrawParam[] calldata _withdrawParams) external onlyOwner { | ||
| uint256 _length = _withdrawParams.length; | ||
| for (uint256 _i; _i < _length; ) { | ||
| IERC20(_withdrawParams[_i].token).safeTransfer(_withdrawParams[_i].to, _withdrawParams[_i].amount); | ||
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| unchecked { | ||
| ++_i; | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| // SPDX-License-Identifier: BUSL | ||
| pragma solidity 0.8.19; | ||
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| import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol"; | ||
| import { LibPath } from "./libraries/LibPath.sol"; | ||
| import { IPancakeV3Pool } from "../money-market/interfaces/IPancakeV3Pool.sol"; | ||
| import { IUniSwapV3PathReader } from "./interfaces/IUniSwapV3PathReader.sol"; | ||
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| contract PCSV3PathReader is IUniSwapV3PathReader, Ownable { | ||
| using LibPath for bytes; | ||
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| address internal constant PANCAKE_V3_POOL_DEPLOYER = 0x41ff9AA7e16B8B1a8a8dc4f0eFacd93D02d071c9; | ||
| bytes32 internal constant POOL_INIT_CODE_HASH = 0x6ce8eb472fa82df5469c6ab6d485f17c3ad13c8cd7af59b3d4a8026c5ce0f7e2; | ||
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| // tokenIn => tokenOut => path | ||
| mapping(address => mapping(address => bytes)) public override paths; | ||
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| // Errors | ||
| error PCSV3PathReader_NoLiquidity(address tokenA, address tokenB, uint24 fee); | ||
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| // Events | ||
| event LogSetPath(address _token0, address _token1, bytes _path); | ||
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| function setPaths(bytes[] calldata _paths) external onlyOwner { | ||
| uint256 _len = _paths.length; | ||
| for (uint256 _i; _i < _len; ) { | ||
| bytes memory _path = _paths[_i]; | ||
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| while (true) { | ||
| bool hasMultiplePools = LibPath.hasMultiplePools(_path); | ||
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| // extract the token from first encoded hop | ||
| (address _token0, address _token1, uint24 _fee) = _path.decodeFirstPool(); | ||
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| // compute pool address from token0, token1 and fee | ||
| address _pool = _computeAddressV3(_token0, _token1, _fee); | ||
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| // revert EVM error if pool is not existing (cannot call liquidity) | ||
| if (IPancakeV3Pool(_pool).liquidity() == 0) { | ||
| // revert no liquidity if there's no liquidity | ||
| revert PCSV3PathReader_NoLiquidity(_token0, _token1, _fee); | ||
| } | ||
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| // if true, go to the next hop | ||
| if (hasMultiplePools) { | ||
| _path = _path.skipToken(); | ||
| } else { | ||
| // if it's last hop | ||
| // Get source token address from first hop | ||
| (address _source, , ) = _paths[_i].decodeFirstPool(); | ||
| // Get destination token from last hop | ||
| (, address _destination, ) = _path.decodeFirstPool(); | ||
| // Assign to global paths | ||
| paths[_source][_destination] = _paths[_i]; | ||
| emit LogSetPath(_source, _destination, _paths[_i]); | ||
| break; | ||
| } | ||
| } | ||
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| unchecked { | ||
| ++_i; | ||
| } | ||
| } | ||
| } | ||
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| function _computeAddressV3( | ||
| address _tokenA, | ||
| address _tokenB, | ||
| uint24 _fee | ||
| ) internal pure returns (address pool) { | ||
| if (_tokenA > _tokenB) (_tokenA, _tokenB) = (_tokenB, _tokenA); | ||
| pool = address( | ||
| uint160( | ||
| uint256( | ||
| keccak256( | ||
| abi.encodePacked( | ||
| hex"ff", | ||
| PANCAKE_V3_POOL_DEPLOYER, | ||
| keccak256(abi.encode(_tokenA, _tokenB, _fee)), | ||
| POOL_INIT_CODE_HASH | ||
| ) | ||
| ) | ||
| ) | ||
| ) | ||
| ); | ||
| } | ||
| } |
8 changes: 8 additions & 0 deletions
8
solidity/contracts/reader/interfaces/IUniSwapV3PathReader.sol
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| // SPDX-License-Identifier: BUSL | ||
| pragma solidity 0.8.19; | ||
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| interface IUniSwapV3PathReader { | ||
| function setPaths(bytes[] calldata _paths) external; | ||
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| function paths(address _source, address _destination) external returns (bytes memory); | ||
| } |
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