// SPDX-License-Identifier: CC0-1.0
pragma solidity 0.8.15;
/**
* @title EIP1967Admin
* @dev Upgradeable proxy pattern implementation according to minimalistic EIP1967.
*/
contract EIP1967Admin {
// EIP 1967
// bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1)
uint256 internal constant EIP1967_ADMIN_STORAGE = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
modifier onlyAdmin() {
require(msg.sender == _admin(), "EIP1967Admin: not an admin");
_;
}
function _admin() internal view returns (address res) {
assembly {
res := sload(EIP1967_ADMIN_STORAGE)
}
}
}
// SPDX-License-Identifier: CC0-1.0
pragma solidity 0.8.15;
import "./EIP1967Admin.sol";
/**
* @title EIP1967Proxy
* @dev Upgradeable proxy pattern implementation according to minimalistic EIP1967.
*/
contract EIP1967Proxy is EIP1967Admin {
// EIP 1967
// bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
uint256 internal constant EIP1967_IMPLEMENTATION_STORAGE =
0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
event Upgraded(address indexed implementation);
event AdminChanged(address previousAdmin, address newAdmin);
constructor(address _admin, address _implementation, bytes memory _data) payable {
_setAdmin(_admin);
_setImplementation(_implementation);
if (_data.length > 0) {
bool status;
assembly {
status := callcode(gas(), _implementation, callvalue(), add(_data, 32), mload(_data), 0, 0)
}
require(status, "EIP1967Proxy: initialize call failed");
}
}
/**
* @dev Tells the proxy admin account address.
* @return proxy admin address.
*/
function admin() public view returns (address) {
return _admin();
}
/**
* @dev Tells the proxy implementation contract address.
* @return res implementation address.
*/
function implementation() public view returns (address res) {
assembly {
res := sload(EIP1967_IMPLEMENTATION_STORAGE)
}
}
/**
* @dev Updates address of the proxy owner.
* Callable only by the proxy admin.
* @param _admin address of the new proxy admin.
*/
function setAdmin(address _admin) external onlyAdmin {
_setAdmin(_admin);
}
/**
* @dev Updates proxy implementation address.
* Callable only by the proxy admin.
* @param _implementation address of the new proxy implementation.
*/
function upgradeTo(address _implementation) external onlyAdmin {
_setImplementation(_implementation);
}
/**
* @dev Updates proxy implementation address and makes an initialization call to new implementation.
* Callable only by the proxy admin.
* @param _implementation address of the new proxy implementation.
* @param _data calldata to pass through the new implementation after the upgrade.
*/
function upgradeToAndCall(address _implementation, bytes calldata _data) external payable onlyAdmin {
_setImplementation(_implementation);
(bool status,) = address(this).call{value: msg.value}(_data);
require(status, "EIP1967Proxy: update call failed");
}
/**
* @dev Fallback function allowing to perform a delegatecall to the given implementation.
* This function will return whatever the implementation call returns
*/
fallback() external payable {
address impl = implementation();
require(impl != address(0));
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), impl, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 { revert(0, returndatasize()) }
default { return(0, returndatasize()) }
}
}
/**
* @dev Internal function for transfer current admin rights to a different account.
* @param _admin address of the new administrator.
*/
function _setAdmin(address _admin) internal {
address previousAdmin = admin();
require(_admin != address(0));
require(previousAdmin != _admin);
assembly {
sstore(EIP1967_ADMIN_STORAGE, _admin)
}
emit AdminChanged(previousAdmin, _admin);
}
/**
* @dev Internal function for setting a new implementation address.
* @param _implementation address of the new implementation contract.
*/
function _setImplementation(address _implementation) internal {
require(_implementation != address(0));
require(implementation() != _implementation);
assembly {
sstore(EIP1967_IMPLEMENTATION_STORAGE, _implementation)
}
emit Upgraded(_implementation);
}
}
{
"compilationTarget": {
"src/proxy/EIP1967Proxy.sol": "EIP1967Proxy"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": [
":@gnosis/=lib/@gnosis/",
":@gnosis/auction/=lib/@gnosis/auction/contracts/",
":@openzeppelin/=lib/@openzeppelin/contracts/",
":@openzeppelin/contracts/=lib/@openzeppelin/contracts/contracts/",
":ds-test/=lib/forge-std/lib/ds-test/src/",
":forge-std/=lib/forge-std/src/"
]
}
[{"inputs":[{"internalType":"address","name":"_admin","type":"address"},{"internalType":"address","name":"_implementation","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"stateMutability":"payable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"res","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_admin","type":"address"}],"name":"setAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_implementation","type":"address"}],"name":"upgradeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_implementation","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"payable","type":"function"}]