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| |
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|
| pragma solidity ^0.8.22; |
|
|
| import {Proxy} from "../Proxy.sol"; |
| import {ERC1967Utils} from "./ERC1967Utils.sol"; |
|
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| |
| * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an |
| * implementation address that can be changed. This address is stored in storage in the location specified by |
| * https://eips.ethereum.org/EIPS/eip-1967[ERC-1967], so that it doesn't conflict with the storage layout of the |
| * implementation behind the proxy. |
| */ |
| contract ERC1967Proxy is Proxy { |
| |
| * @dev Initializes the upgradeable proxy with an initial implementation specified by `implementation`. |
| * |
| * If `_data` is nonempty, it's used as data in a delegate call to `implementation`. This will typically be an |
| * encoded function call, and allows initializing the storage of the proxy like a Solidity constructor. |
| * |
| * Requirements: |
| * |
| * - If `data` is empty, `msg.value` must be zero. |
| */ |
| constructor(address implementation, bytes memory _data) payable { |
| ERC1967Utils.upgradeToAndCall(implementation, _data); |
| } |
|
|
| |
| * @dev Returns the current implementation address. |
| * |
| * TIP: To get this value clients can read directly from the storage slot shown below (specified by ERC-1967) using |
| * the https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call. |
| * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc` |
| */ |
| function _implementation() internal view virtual override returns (address) { |
| return ERC1967Utils.getImplementation(); |
| } |
| } |
|
|
