@etherspot/contracts
Version:
Etherspot Solidity contracts
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JSON
{
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"content": "// SPDX-License-Identifier: MIT\n// File: common/helpers/DiamondReentrancyGuard.sol\n\npragma solidity 0.8.4;\n\n/// @title Reentrancy Guard\n/// @notice Abstract contract to provide protection against reentrancy\nabstract contract ReentrancyGuard {\n //////////////////////////////////////////////////////////////\n ////////////////////////// Storage ///////////////////////////\n //////////////////////////////////////////////////////////////\n\n bytes32 private constant NAMESPACE =\n keccak256(\"io.etherspot.helpers.reentrancyguard\");\n\n //////////////////////////////////////////////////////////////\n ////////////////////////// Structs ///////////////////////////\n //////////////////////////////////////////////////////////////\n\n struct ReentrancyStorage {\n uint256 status;\n }\n\n //////////////////////////////////////////////////////////////\n ////////////////////////// Errors ////////////////////////////\n //////////////////////////////////////////////////////////////\n\n error ReentrancyError();\n\n //////////////////////////////////////////////////////////////\n ///////////////////////// Constants //////////////////////////\n //////////////////////////////////////////////////////////////\n\n uint256 private constant _NOT_ENTERED = 0;\n uint256 private constant _ENTERED = 1;\n\n //////////////////////////////////////////////////////////////\n ///////////////////////// Modifiers ///////////////////////////\n //////////////////////////////////////////////////////////////\n\n modifier nonReentrant() {\n ReentrancyStorage storage s = reentrancyStorage();\n if (s.status == _ENTERED) revert ReentrancyError();\n s.status = _ENTERED;\n _;\n s.status = _NOT_ENTERED;\n }\n\n //////////////////////////////////////////////////////////////\n ////////////////////// Private Functions /////////////////////\n //////////////////////////////////////////////////////////////\n\n /// @dev fetch local storage\n function reentrancyStorage()\n private\n pure\n returns (ReentrancyStorage storage data)\n {\n bytes32 position = NAMESPACE;\n // solhint-disable-next-line no-inline-assembly\n assembly {\n data.slot := position\n }\n }\n}\n"
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