63 lines
1.7 KiB
Solidity
63 lines
1.7 KiB
Solidity
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.19;
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/**
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* @title Transparent Proxy
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* @notice Transparent proxy pattern for upgradeable oracle contracts
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* @dev Based on OpenZeppelin's transparent proxy pattern
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*/
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contract Proxy {
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address public implementation;
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address public admin;
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event Upgraded(address indexed implementation);
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event AdminChanged(address indexed oldAdmin, address indexed newAdmin);
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modifier onlyAdmin() {
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require(msg.sender == admin, "Proxy: only admin");
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_;
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}
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constructor(address _implementation, address _admin) {
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implementation = _implementation;
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admin = _admin;
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}
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/**
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* @notice Upgrade the implementation
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*/
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function upgrade(address newImplementation) external onlyAdmin {
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require(newImplementation != address(0), "Proxy: zero address");
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implementation = newImplementation;
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emit Upgraded(newImplementation);
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}
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/**
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* @notice Change admin
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*/
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function changeAdmin(address newAdmin) external onlyAdmin {
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require(newAdmin != address(0), "Proxy: zero address");
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address oldAdmin = admin;
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admin = newAdmin;
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emit AdminChanged(oldAdmin, newAdmin);
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}
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/**
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* @notice Delegate call to implementation
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*/
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fallback() external payable {
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address impl = implementation;
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assembly {
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calldatacopy(0, 0, calldatasize())
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let result := delegatecall(gas(), impl, 0, calldatasize(), 0, 0)
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returndatacopy(0, 0, returndatasize())
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switch result
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case 0 { revert(0, returndatasize()) }
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default { return(0, returndatasize()) }
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}
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}
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receive() external payable {}
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}
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