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87 lines
3.0 KiB
87 lines
3.0 KiB
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.0;
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import "../beacon/IBeacon.sol";
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import "../../utils/Address.sol";
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import "../../utils/StorageSlot.sol";
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/**
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* @dev This abstract contract provides setters and getters for the different
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* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] storage slots.
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*
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* _Available since v4.1._
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*/
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abstract contract ERC1967Storage {
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/**
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* @dev Storage slot with the address of the current implementation.
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* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
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* validated in the constructor.
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*/
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bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
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/**
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* @dev Returns the current implementation address.
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*/
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function _getImplementation() internal view returns (address) {
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return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
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}
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/**
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* @dev Stores a new address in the EIP1967 implementation slot.
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*/
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function _setImplementation(address newImplementation) internal {
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require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
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StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
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}
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/**
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* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
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* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
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*/
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bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
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/**
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* @dev Returns the current beacon.
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*/
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function _getBeacon() internal view returns (address) {
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return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
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}
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/**
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* @dev Stores a new beacon in the EIP1967 beacon slot.
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*/
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function _setBeacon(address newBeacon) internal {
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require(
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Address.isContract(newBeacon),
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"ERC1967: new beacon is not a contract"
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);
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require(
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Address.isContract(IBeacon(newBeacon).implementation()),
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"ERC1967: beacon implementation is not a contract"
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);
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StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
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}
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/**
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* @dev Storage slot with the admin of the contract.
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* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
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* validated in the constructor.
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*/
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bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
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/**
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* @dev Returns the current admin.
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*/
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function _getAdmin() internal view returns (address) {
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return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
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}
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/**
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* @dev Stores a new address in the EIP1967 admin slot.
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*/
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function _setAdmin(address newAdmin) internal {
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require(newAdmin != address(0), "ERC1967: new admin is the zero address");
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StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
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}
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}
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