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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| // SPDX-License-Identifier: GPL-2.0-or-later | ||
| pragma solidity ^0.8.0; | ||
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| import {StorageLib, AggregationVaultStorage, HooksStorage} from "./lib/StorageLib.sol"; | ||
| import {ErrorsLib} from "./lib/ErrorsLib.sol"; | ||
| import {IEVC} from "ethereum-vault-connector/utils/EVCUtil.sol"; | ||
| import {IHookTarget} from "evk/src/interfaces/IHookTarget.sol"; | ||
| import {HooksLib} from "./lib/HooksLib.sol"; | ||
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| contract Shared { | ||
| using HooksLib for uint32; | ||
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| uint8 internal constant REENTRANCYLOCK__UNLOCKED = 1; | ||
| uint8 internal constant REENTRANCYLOCK__LOCKED = 2; | ||
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| uint32 public constant DEPOSIT = 1 << 0; | ||
| uint32 public constant WITHDRAW = 1 << 1; | ||
| uint32 public constant ADD_STRATEGY = 1 << 2; | ||
| uint32 public constant REMOVE_STRATEGY = 1 << 3; | ||
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| uint32 constant ACTIONS_COUNTER = 1 << 4; | ||
| uint256 constant HOOKS_MASK = 0x00000000000000000000000000000000000000000000000000000000FFFFFFFF; | ||
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| event SetHooksConfig(address indexed hooksTarget, uint32 hookedFns); | ||
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| modifier nonReentrant() { | ||
| AggregationVaultStorage storage $ = StorageLib._getAggregationVaultStorage(); | ||
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| if ($.locked == REENTRANCYLOCK__LOCKED) revert ErrorsLib.Reentrancy(); | ||
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| $.locked = REENTRANCYLOCK__LOCKED; | ||
| _; | ||
| $.locked = REENTRANCYLOCK__UNLOCKED; | ||
| } | ||
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| function _msgSender() internal view virtual returns (address) { | ||
| address sender = msg.sender; | ||
| AggregationVaultStorage storage $ = StorageLib._getAggregationVaultStorage(); | ||
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| if (sender == address($.evc)) { | ||
| (sender,) = IEVC($.evc).getCurrentOnBehalfOfAccount(address(0)); | ||
| } | ||
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| return sender; | ||
| } | ||
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| function _setHooksConfig(address _hooksTarget, uint32 _hookedFns) internal { | ||
| if (_hooksTarget != address(0) && IHookTarget(_hooksTarget).isHookTarget() != IHookTarget.isHookTarget.selector) | ||
| { | ||
| revert ErrorsLib.NotHooksContract(); | ||
| } | ||
| if (_hookedFns != 0 && _hooksTarget == address(0)) { | ||
| revert ErrorsLib.InvalidHooksTarget(); | ||
| } | ||
| if (_hookedFns >= ACTIONS_COUNTER) revert ErrorsLib.InvalidHookedFns(); | ||
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| HooksStorage storage $ = StorageLib._getHooksStorage(); | ||
| $.hooksConfig = (uint256(uint160(_hooksTarget)) << 32) | uint256(_hookedFns); | ||
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| emit SetHooksConfig(_hooksTarget, _hookedFns); | ||
| } | ||
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| /// @notice Checks whether a hook has been installed for the function and if so, invokes the hook target. | ||
| /// @param _fn Function to call the hook for. | ||
| /// @param _caller Caller's address. | ||
| function _callHooksTarget(uint32 _fn, address _caller) internal { | ||
| HooksStorage storage $ = StorageLib._getHooksStorage(); | ||
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| (address target, uint32 hookedFns) = _getHooksConfig($.hooksConfig); | ||
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| if (hookedFns.isNotSet(_fn)) return; | ||
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| (bool success, bytes memory data) = target.call(abi.encodePacked(msg.data, _caller)); | ||
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| if (!success) _revertBytes(data); | ||
| } | ||
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| /// @notice Get the hooks contract and the hooked functions. | ||
| /// @return address Hooks contract. | ||
| /// @return uint32 Hooked functions. | ||
| function _getHooksConfig(uint256 _hooksConfig) internal pure returns (address, uint32) { | ||
| return (address(uint160(_hooksConfig >> 32)), uint32(_hooksConfig & HOOKS_MASK)); | ||
| } | ||
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| /// @dev Revert with call error or EmptyError | ||
| /// @param _errorMsg call revert message | ||
| function _revertBytes(bytes memory _errorMsg) private pure { | ||
| if (_errorMsg.length > 0) { | ||
| assembly { | ||
| revert(add(32, _errorMsg), mload(_errorMsg)) | ||
| } | ||
| } | ||
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| revert ErrorsLib.EmptyError(); | ||
| } | ||
| } |
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