dexorder

lib_openzeppelin_contracts/contracts/proxy/ERC1967/ERC1967Proxy.sol

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: MIT
+// OpenZeppelin Contracts (last updated v5.0.0) (proxy/ERC1967/ERC1967Proxy.sol)
+
+pragma solidity ^0.8.20;
+
+import {Proxy} from "../Proxy.sol";
+import {ERC1967Utils} from "./ERC1967Utils.sol";
+
+/**
+ * @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();
+    }
+}