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46 lines
1.6 KiB
Solidity
46 lines
1.6 KiB
Solidity
// SPDX-License-Identifier: BUSL-1.1
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pragma solidity 0.8.21;
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import { Variables } from "./variables.sol";
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import { ErrorTypes } from "../errorTypes.sol";
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import { Error } from "../error.sol";
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/// @dev ReentrancyGuard based on OpenZeppelin implementation.
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/// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v4.8/contracts/security/ReentrancyGuard.sol
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abstract contract ReentrancyGuard is Variables, Error {
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uint8 internal constant REENTRANCY_NOT_ENTERED = 1;
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uint8 internal constant REENTRANCY_ENTERED = 2;
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constructor() {
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// on logic contracts, switch reentrancy to entered so no call is possible (forces delegatecall)
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_status = REENTRANCY_ENTERED;
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}
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/// @dev Prevents a contract from calling itself, directly or indirectly.
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/// See OpenZeppelin implementation for more info
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modifier reentrancy() {
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// On the first call to nonReentrant, _status will be NOT_ENTERED
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if (_status == REENTRANCY_ENTERED) {
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revert FluidLiquidityError(ErrorTypes.LiquidityHelpers__Reentrancy);
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}
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// Any calls to nonReentrant after this point will fail
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_status = REENTRANCY_ENTERED;
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_;
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// By storing the original value once again, a refund is triggered (see
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// https://eips.ethereum.org/EIPS/eip-2200)
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_status = REENTRANCY_NOT_ENTERED;
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}
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}
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abstract contract CommonHelpers is ReentrancyGuard {
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/// @dev Returns the current admin (governance).
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function _getGovernanceAddr() internal view returns (address governance_) {
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assembly {
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governance_ := sload(GOVERNANCE_SLOT)
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}
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}
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}
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