Address Details
contract
0x2941Ef47Bf5b72A158C444449D0934fcfcF3C307
- Contract Name
- Proxy
- Creator
- 0x743d80–035b13 at 0xfe0f6c–ff8420
- Balance
- 0 CELO ( )
- Locked CELO Balance
- 0.00 CELO
- Voting CELO Balance
- 0.00 CELO
- Pending Unlocked Gold
- 0.00 CELO
- Lifetime Voting Rewards
- 18589.59 CELO
- Tokens
-
Fetching tokens...
- Transactions
- 17 Transactions
- Transfers
- 10 Transfers
- Gas Used
- 1,653,186
- Last Balance Update
- 14033749
Transactions
Token Transfers
Tokens
Internal Transactions
Coin Balance History
Logs
Celo Info
Epoch Transactions
Code
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Contract is not verified. However, we found a verified contract with the same bytecode in Blockscout DB 0x26f5ce98b6e6515e943b53020857ac617662740e.
All metadata displayed below is from that contract. In order to verify current contract, click Verify & Publish button
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- Contract name:
- Proxy
- Optimization enabled
- false
- Compiler version
- v0.5.8+commit.23d335f2
- Verified at
- 2022-02-17T12:07:53.544509Z
/Users/carter/git/clabs/celo-monorepo/packages/protocol/contracts/common/Proxy.sol
pragma solidity ^0.5.3; /* solhint-disable no-inline-assembly, no-complex-fallback, avoid-low-level-calls */ import "openzeppelin-solidity/contracts/utils/Address.sol"; /** * @title A Proxy utilizing the Unstructured Storage pattern. */ contract Proxy { // Used to store the address of the owner. bytes32 private constant OWNER_POSITION = bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1); // Used to store the address of the implementation contract. bytes32 private constant IMPLEMENTATION_POSITION = bytes32( uint256(keccak256("eip1967.proxy.implementation")) - 1 ); event OwnerSet(address indexed owner); event ImplementationSet(address indexed implementation); constructor() public { _setOwner(msg.sender); } /** * @notice Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == _getOwner(), "sender was not owner"); _; } /** * @notice Delegates calls to the implementation contract. */ function() external payable { bytes32 implementationPosition = IMPLEMENTATION_POSITION; address implementationAddress; // Load the address of the implementation contract from an explicit storage slot. assembly { implementationAddress := sload(implementationPosition) } // Avoid checking if address is a contract or executing delegated call when // implementation address is 0x0 require(implementationAddress != address(0), "No Implementation set"); require(Address.isContract(implementationAddress), "Invalid contract address"); assembly { // Extract the position of the transaction data (i.e. function ID and arguments). let newCallDataPosition := mload(0x40) mstore(0x40, add(newCallDataPosition, calldatasize)) calldatacopy(newCallDataPosition, 0, calldatasize) // Call the smart contract at `implementationAddress` in the context of the proxy contract, // with the same msg.sender and value. let delegatecallSuccess := delegatecall( gas, implementationAddress, newCallDataPosition, calldatasize, 0, 0 ) // Copy the return value of the call so it can be returned. let returnDataSize := returndatasize let returnDataPosition := mload(0x40) mstore(0x40, add(returnDataPosition, returnDataSize)) returndatacopy(returnDataPosition, 0, returnDataSize) // Revert or return depending on whether or not the call was successful. switch delegatecallSuccess case 0 { revert(returnDataPosition, returnDataSize) } default { return(returnDataPosition, returnDataSize) } } } /** * @notice Transfers ownership of Proxy to a new owner. * @param newOwner Address of the new owner account. */ function _transferOwnership(address newOwner) external onlyOwner { _setOwner(newOwner); } /** * @notice Sets the address of the implementation contract and calls into it. * @param implementation Address of the new target contract. * @param callbackData The abi-encoded function call to perform in the implementation * contract. * @dev Throws if the initialization callback fails. * @dev If the target contract does not need initialization, use * setImplementation instead. */ function _setAndInitializeImplementation(address implementation, bytes calldata callbackData) external payable onlyOwner { _setImplementation(implementation); bool success; bytes memory returnValue; (success, returnValue) = implementation.delegatecall(callbackData); require(success, "initialization callback failed"); } /** * @notice Returns the implementation address. */ function _getImplementation() external view returns (address implementation) { bytes32 implementationPosition = IMPLEMENTATION_POSITION; // Load the address of the implementation contract from an explicit storage slot. assembly { implementation := sload(implementationPosition) } } /** * @notice Sets the address of the implementation contract. * @param implementation Address of the new target contract. * @dev If the target contract needs to be initialized, call * setAndInitializeImplementation instead. */ function _setImplementation(address implementation) public onlyOwner { bytes32 implementationPosition = IMPLEMENTATION_POSITION; require(Address.isContract(implementation), "Invalid contract address"); // Store the address of the implementation contract in an explicit storage slot. assembly { sstore(implementationPosition, implementation) } emit ImplementationSet(implementation); } /** * @notice Returns the Proxy owner's address. */ function _getOwner() public view returns (address owner) { bytes32 position = OWNER_POSITION; // Load the address of the contract owner from an explicit storage slot. assembly { owner := sload(position) } } function _setOwner(address newOwner) private { require(newOwner != address(0), "owner cannot be 0"); bytes32 position = OWNER_POSITION; // Store the address of the contract owner in an explicit storage slot. assembly { sstore(position, newOwner) } emit OwnerSet(newOwner); } }
Contract ABI
[{"type":"function","stateMutability":"payable","payable":true,"outputs":[],"name":"_setAndInitializeImplementation","inputs":[{"type":"address","name":"implementation"},{"type":"bytes","name":"callbackData"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"implementation"}],"name":"_getImplementation","inputs":[],"constant":true},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"_setImplementation","inputs":[{"type":"address","name":"implementation"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[],"name":"_transferOwnership","inputs":[{"type":"address","name":"newOwner"}],"constant":false},{"type":"function","stateMutability":"view","payable":false,"outputs":[{"type":"address","name":"owner"}],"name":"_getOwner","inputs":[],"constant":true},{"type":"constructor","stateMutability":"nonpayable","payable":false,"inputs":[]},{"type":"fallback","stateMutability":"payable","payable":true},{"type":"event","name":"OwnerSet","inputs":[{"type":"address","name":"owner","indexed":true}],"anonymous":false},{"type":"event","name":"ImplementationSet","inputs":[{"type":"address","name":"implementation","indexed":true}],"anonymous":false}]
Contract Creation Code
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Deployed ByteCode
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