Source Code
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ETH Balance
0 ETH
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ContractCreator
GENESIS at txn GENESIS_4200000000000000000000000000000000000000
Multichain Info
N/A
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Contract Name:
Proxy
Compiler Version
v0.8.15+commit.e14f2714
Contract Source Code (Solidity Standard Json-Input format)
/** *Submitted for verification at Optimistic.Etherscan.io on 2023-07-12 */ // SPDX-License-Identifier: MIT pragma solidity 0.8.15; /** * @title Proxy * @notice Proxy is a transparent proxy that passes through the call if the caller is the owner or * if the caller is address(0), meaning that the call originated from an off-chain * simulation. */ contract Proxy { /** * @notice The storage slot that holds the address of the implementation. * bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1) */ bytes32 internal constant IMPLEMENTATION_KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; /** * @notice The storage slot that holds the address of the owner. * bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1) */ bytes32 internal constant OWNER_KEY = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103; /** * @notice An event that is emitted each time the implementation is changed. This event is part * of the EIP-1967 specification. * * @param implementation The address of the implementation contract */ event Upgraded(address indexed implementation); /** * @notice An event that is emitted each time the owner is upgraded. This event is part of the * EIP-1967 specification. * * @param previousAdmin The previous owner of the contract * @param newAdmin The new owner of the contract */ event AdminChanged(address previousAdmin, address newAdmin); /** * @notice A modifier that reverts if not called by the owner or by address(0) to allow * eth_call to interact with this proxy without needing to use low-level storage * inspection. We assume that nobody is able to trigger calls from address(0) during * normal EVM execution. */ modifier proxyCallIfNotAdmin() { if (msg.sender == _getAdmin() || msg.sender == address(0)) { _; } else { // This WILL halt the call frame on completion. _doProxyCall(); } } /** * @notice Sets the initial admin during contract deployment. Admin address is stored at the * EIP-1967 admin storage slot so that accidental storage collision with the * implementation is not possible. * * @param _admin Address of the initial contract admin. Admin as the ability to access the * transparent proxy interface. */ constructor(address _admin) { _changeAdmin(_admin); } // slither-disable-next-line locked-ether receive() external payable { // Proxy call by default. _doProxyCall(); } // slither-disable-next-line locked-ether fallback() external payable { // Proxy call by default. _doProxyCall(); } /** * @notice Set the implementation contract address. The code at the given address will execute * when this contract is called. * * @param _implementation Address of the implementation contract. */ function upgradeTo(address _implementation) external proxyCallIfNotAdmin { _setImplementation(_implementation); } /** * @notice Set the implementation and call a function in a single transaction. Useful to ensure * atomic execution of initialization-based upgrades. * * @param _implementation Address of the implementation contract. * @param _data Calldata to delegatecall the new implementation with. */ function upgradeToAndCall(address _implementation, bytes calldata _data) external payable proxyCallIfNotAdmin returns (bytes memory) { _setImplementation(_implementation); (bool success, bytes memory returndata) = _implementation.delegatecall(_data); require(success, "Proxy: delegatecall to new implementation contract failed"); return returndata; } /** * @notice Changes the owner of the proxy contract. Only callable by the owner. * * @param _admin New owner of the proxy contract. */ function changeAdmin(address _admin) external proxyCallIfNotAdmin { _changeAdmin(_admin); } /** * @notice Gets the owner of the proxy contract. * * @return Owner address. */ function admin() external proxyCallIfNotAdmin returns (address) { return _getAdmin(); } /** * @notice Queries the implementation address. * * @return Implementation address. */ function implementation() external proxyCallIfNotAdmin returns (address) { return _getImplementation(); } /** * @notice Sets the implementation address. * * @param _implementation New implementation address. */ function _setImplementation(address _implementation) internal { assembly { sstore(IMPLEMENTATION_KEY, _implementation) } emit Upgraded(_implementation); } /** * @notice Changes the owner of the proxy contract. * * @param _admin New owner of the proxy contract. */ function _changeAdmin(address _admin) internal { address previous = _getAdmin(); assembly { sstore(OWNER_KEY, _admin) } emit AdminChanged(previous, _admin); } /** * @notice Performs the proxy call via a delegatecall. */ function _doProxyCall() internal { address impl = _getImplementation(); require(impl != address(0), "Proxy: implementation not initialized"); assembly { // Copy calldata into memory at 0x0....calldatasize. calldatacopy(0x0, 0x0, calldatasize()) // Perform the delegatecall, make sure to pass all available gas. let success := delegatecall(gas(), impl, 0x0, calldatasize(), 0x0, 0x0) // Copy returndata into memory at 0x0....returndatasize. Note that this *will* // overwrite the calldata that we just copied into memory but that doesn't really // matter because we'll be returning in a second anyway. returndatacopy(0x0, 0x0, returndatasize()) // Success == 0 means a revert. We'll revert too and pass the data up. if iszero(success) { revert(0x0, returndatasize()) } // Otherwise we'll just return and pass the data up. return(0x0, returndatasize()) } } /** * @notice Queries the implementation address. * * @return Implementation address. */ function _getImplementation() internal view returns (address) { address impl; assembly { impl := sload(IMPLEMENTATION_KEY) } return impl; } /** * @notice Queries the owner of the proxy contract. * * @return Owner address. */ function _getAdmin() internal view returns (address) { address owner; assembly { owner := sload(OWNER_KEY) } return owner; } }
{ "optimizer": { "enabled": true, "runs": 10000 }, "metadata": { "bytecodeHash": "none" }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } }, "evmVersion": "london", "libraries": {} }
[{"inputs":[{"internalType":"address","name":"_admin","type":"address"}],"stateMutability":"nonpayable","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":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_admin","type":"address"}],"name":"changeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"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":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"payable","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Deployed Bytecode
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Deployed Bytecode Sourcemap
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Swarm Source
none
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