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Read Proxy
Write Contract
Write Proxy
Contract is not verified. However, we found a verified contract with the same bytecode in Blockscout DB 0x7e803b54295cd113bf48e7f069f0531575da1139.
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- Contract name:
- UUPSProxy
- Optimization enabled
- true
- Compiler version
- v0.8.2+commit.661d1103
- Optimization runs
- 200
- Verified at
- 2022-09-02T04:06:23.945911Z
UUPSProxy.sol
// SPDX-License-Identifier: BUSL-1.1pragma solidity 0.8.2;import "ERC1967Proxy.sol";contract UUPSProxy is ERC1967Proxy {constructor(address _logic, bytes memory _data) ERC1967Proxy(_logic, _data) payable {}}
StorageSlot.sol
// SPDX-License-Identifier: MITpragma solidity ^0.8.0;/*** @dev Library for reading and writing primitive types to specific storage slots.** Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.* This library helps with reading and writing to such slots without the need for inline assembly.** The functions in this library return Slot structs that contain a `value` member that can be used to read or write.** Example usage to set ERC1967 implementation slot:* ```* contract ERC1967 {* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;** function _getImplementation() internal view returns (address) {* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;* }** function _setImplementation(address newImplementation) internal {* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;* }* }* ```** _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._*/library StorageSlot {struct AddressSlot {address value;}struct BooleanSlot {bool value;}struct Bytes32Slot {bytes32 value;
Address.sol
// SPDX-License-Identifier: MITpragma solidity ^0.8.0;/*** @dev Collection of functions related to the address type*/library Address {/*** @dev Returns true if `account` is a contract.** [IMPORTANT]* ====* It is unsafe to assume that an address for which this function returns* false is an externally-owned account (EOA) and not a contract.** Among others, `isContract` will return false for the following* types of addresses:** - an externally-owned account* - a contract in construction* - an address where a contract will be created* - an address where a contract lived, but was destroyed* ====*/function isContract(address account) internal view returns (bool) {// This method relies on extcodesize, which returns 0 for contracts in// construction, since the code is only stored at the end of the// constructor execution.uint256 size;assembly {size := extcodesize(account)}return size > 0;}/*** @dev Replacement for Solidity's `transfer`: sends `amount` wei to* `recipient`, forwarding all available gas and reverting on errors.*
ERC1967Proxy.sol
// SPDX-License-Identifier: MITpragma solidity ^0.8.0;import "Proxy.sol";import "ERC1967Upgrade.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[EIP1967], so that it doesn't conflict with the storage layout of the* implementation behind the proxy.*/contract ERC1967Proxy is Proxy, ERC1967Upgrade {/*** @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.** If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded* function call, and allows initializating the storage of the proxy like a Solidity constructor.*/constructor(address _logic, bytes memory _data) payable {assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));_upgradeToAndCall(_logic, _data, false);}/*** @dev Returns the current implementation address.*/function _implementation() internal view virtual override returns (address impl) {return ERC1967Upgrade._getImplementation();}}
ERC1967Upgrade.sol
// SPDX-License-Identifier: MITpragma solidity ^0.8.2;import "IBeacon.sol";import "Address.sol";import "StorageSlot.sol";/*** @dev This abstract contract provides getters and event emitting update functions for* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.** _Available since v4.1._** @custom:oz-upgrades-unsafe-allow delegatecall*/abstract contract ERC1967Upgrade {// This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;/*** @dev Storage slot with the address of the current implementation.* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is* validated in the constructor.*/bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;/*** @dev Emitted when the implementation is upgraded.*/event Upgraded(address indexed implementation);/*** @dev Returns the current implementation address.*/function _getImplementation() internal view returns (address) {return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;}/*** @dev Stores a new address in the EIP1967 implementation slot.
IBeacon.sol
// SPDX-License-Identifier: MITpragma solidity ^0.8.0;/*** @dev This is the interface that {BeaconProxy} expects of its beacon.*/interface IBeacon {/*** @dev Must return an address that can be used as a delegate call target.** {BeaconProxy} will check that this address is a contract.*/function implementation() external view returns (address);}
Proxy.sol
// SPDX-License-Identifier: MITpragma solidity ^0.8.0;/*** @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to* be specified by overriding the virtual {_implementation} function.** Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a* different contract through the {_delegate} function.** The success and return data of the delegated call will be returned back to the caller of the proxy.*/abstract contract Proxy {/*** @dev Delegates the current call to `implementation`.** This function does not return to its internall call site, it will return directly to the external caller.*/function _delegate(address implementation) internal virtual {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(), implementation, 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())
Contract ABI
[{"type":"constructor","stateMutability":"payable","inputs":[{"type":"address","name":"_logic","internalType":"address"},{"type":"bytes","name":"_data","internalType":"bytes"}]},{"type":"event","name":"AdminChanged","inputs":[{"type":"address","name":"previousAdmin","internalType":"address","indexed":false},{"type":"address","name":"newAdmin","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"BeaconUpgraded","inputs":[{"type":"address","name":"beacon","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"Upgraded","inputs":[{"type":"address","name":"implementation","internalType":"address","indexed":true}],"anonymous":false},{"type":"fallback","stateMutability":"payable"},{"type":"receive","stateMutability":"payable"}]
Contract Creation Code
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Deployed ByteCode
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