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58 lines
1.9 KiB
58 lines
1.9 KiB
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.24;
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import {StorageSlot} from "./StorageSlot.sol";
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/**
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* @dev Variant of {ReentrancyGuard} that uses transient storage.
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*
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* NOTE: This variant only works on networks where EIP-1153 is available.
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*/
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abstract contract ReentrancyGuardTransient {
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using StorageSlot for *;
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// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff))
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bytes32 private constant REENTRANCY_GUARD_STORAGE =
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0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00;
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/**
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* @dev Unauthorized reentrant call.
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*/
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error ReentrancyGuardReentrantCall();
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/**
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* @dev Prevents a contract from calling itself, directly or indirectly.
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* Calling a `nonReentrant` function from another `nonReentrant`
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* function is not supported. It is possible to prevent this from happening
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* by making the `nonReentrant` function external, and making it call a
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* `private` function that does the actual work.
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*/
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modifier nonReentrant() {
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_nonReentrantBefore();
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_;
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_nonReentrantAfter();
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}
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function _nonReentrantBefore() private {
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// On the first call to nonReentrant, _status will be NOT_ENTERED
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if (_reentrancyGuardEntered()) {
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revert ReentrancyGuardReentrantCall();
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}
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// Any calls to nonReentrant after this point will fail
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REENTRANCY_GUARD_STORAGE.asBoolean().tstore(true);
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}
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function _nonReentrantAfter() private {
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REENTRANCY_GUARD_STORAGE.asBoolean().tstore(false);
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}
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/**
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* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
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* `nonReentrant` function in the call stack.
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*/
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function _reentrancyGuardEntered() internal view returns (bool) {
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return REENTRANCY_GUARD_STORAGE.asBoolean().tload();
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}
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}
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