1+ // SPDX-License-Identifier: UNLICENSED
2+ pragma solidity ^ 0.8.0 ;
3+ import {Vm} from "forge-std/Vm.sol " ;
4+ import {ProxyAdmin} from "@openzeppelin/contracts/proxy/transparent/ProxyAdmin.sol " ;
5+ import {TransparentUpgradeableProxy} from
6+ "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol " ;
7+
8+ contract EmptyContract {
9+ }
10+
11+ library UpgradeableProxyLib {
12+ bytes32 internal constant IMPLEMENTATION_SLOT =
13+ 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc ;
14+ bytes32 internal constant ADMIN_SLOT =
15+ 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103 ;
16+ Vm internal constant vm = Vm (address (uint160 (uint256 (keccak256 ("hevm cheat code " )))));
17+ function deployProxyAdmin () internal returns (address ) {
18+ return address (new ProxyAdmin ());
19+ }
20+ function setUpEmptyProxy (
21+ address admin
22+ ) internal returns (address ) {
23+ address emptyContract = address (new EmptyContract ());
24+ return address (new TransparentUpgradeableProxy (emptyContract, admin, "" ));
25+ }
26+ function upgrade (address proxy , address impl ) internal {
27+ ProxyAdmin admin = getProxyAdmin (proxy);
28+ admin.upgrade (TransparentUpgradeableProxy (payable (proxy)), impl);
29+ }
30+ function upgradeAndCall (address proxy , address impl , bytes memory initData ) internal {
31+ ProxyAdmin admin = getProxyAdmin (proxy);
32+ admin.upgradeAndCall (TransparentUpgradeableProxy (payable (proxy)), impl, initData);
33+ }
34+ function getImplementation (
35+ address proxy
36+ ) internal view returns (address ) {
37+ bytes32 value = vm.load (proxy, IMPLEMENTATION_SLOT);
38+ return address (uint160 (uint256 (value)));
39+ }
40+ function getProxyAdmin (
41+ address proxy
42+ ) internal view returns (ProxyAdmin) {
43+ bytes32 value = vm.load (proxy, ADMIN_SLOT);
44+ return ProxyAdmin (address (uint160 (uint256 (value))));
45+ }
46+ }
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