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33 lines
1.3 KiB
Solidity
33 lines
1.3 KiB
Solidity
1 year ago
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// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts (last updated v4.7.0) (proxy/ERC1967/ERC1967Proxy.sol)
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pragma solidity ^0.8.0;
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import "../Proxy.sol";
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import "./ERC1967Upgrade.sol";
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/**
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* @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
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* implementation address that can be changed. This address is stored in storage in the location specified by
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* https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
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* implementation behind the proxy.
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*/
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contract ERC1967Proxy is Proxy, ERC1967Upgrade {
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/**
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* @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
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*
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* If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
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* function call, and allows initializing the storage of the proxy like a Solidity constructor.
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*/
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constructor(address _logic, bytes memory _data) payable {
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_upgradeToAndCall(_logic, _data, false);
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}
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/**
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* @dev Returns the current implementation address.
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*/
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function _implementation() internal view virtual override returns (address impl) {
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return ERC1967Upgrade._getImplementation();
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}
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}
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