Address Details
contract
proxy

0x8D6677192144292870907E3Fa8A5527fE55A7ff6

Contract Name
ElectionProxy
Creator
0xe23a4c–2b2dee at 0xc0a505–5073da
Implementation
Election | 0xcde5039e3acb3483aeebebd59cf6936056c455d4
Balance
0 CELO ( )
Locked CELO Balance
0.00 CELO
Voting CELO Balance
0.00 CELO
Pending Unlocked Gold
0.00 CELO
Tokens
Fetching tokens...
Transactions
101,109 Transactions
Transfers
13 Transfers
Gas Used
13,314,650,803
Last Balance Update
28615967
Contract name:
ElectionProxy




Optimization enabled
false
Is a Proxy?
true




Implementation Name:
Election
Compiler version
v0.5.8+commit.23d335f2




Verified at
2020-04-22T21:52:41.614585Z

Contract source code

pragma solidity ^0.5.3;


library Address {
    
    function isContract(address account) internal view returns (bool) {
        
        
        
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    
    function toPayable(address account) internal pure returns (address payable) {
        return address(uint160(account));
    }

    
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        
        (bool success, ) = recipient.call.value(amount)("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
}

contract Proxy {
  
  bytes32 private constant OWNER_POSITION = bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1);
  
  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);
  }

  
  modifier onlyOwner() {
    require(msg.sender == _getOwner(), "sender was not owner");
    _;
  }

  
  function() external payable {
    bytes32 implementationPosition = IMPLEMENTATION_POSITION;

    address implementationAddress;

    
    assembly {
      implementationAddress := sload(implementationPosition)
    }

    
    
    require(implementationAddress != address(0), "No Implementation set");
    require(Address.isContract(implementationAddress), "Invalid contract address");

    assembly {
      
      let newCallDataPosition := mload(0x40)
      mstore(0x40, add(newCallDataPosition, calldatasize))
      calldatacopy(newCallDataPosition, 0, calldatasize)

      
      
      let delegatecallSuccess := delegatecall(
        gas,
        implementationAddress,
        newCallDataPosition,
        calldatasize,
        0,
        0
      )

      
      let returnDataSize := returndatasize
      let returnDataPosition := mload(0x40)
      mstore(0x40, add(returnDataPosition, returnDataSize))
      returndatacopy(returnDataPosition, 0, returnDataSize)

      
      switch delegatecallSuccess
        case 0 {
          revert(returnDataPosition, returnDataSize)
        }
        default {
          return(returnDataPosition, returnDataSize)
        }
    }
  }

  
  function _transferOwnership(address newOwner) external onlyOwner {
    _setOwner(newOwner);
  }

  
  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");
  }

  
  function _getImplementation() external view returns (address implementation) {
    bytes32 implementationPosition = IMPLEMENTATION_POSITION;
    
    assembly {
      implementation := sload(implementationPosition)
    }
  }

  
  function _setImplementation(address implementation) public onlyOwner {
    bytes32 implementationPosition = IMPLEMENTATION_POSITION;

    require(Address.isContract(implementation), "Invalid contract address");

    
    assembly {
      sstore(implementationPosition, implementation)
    }

    emit ImplementationSet(implementation);
  }

  
  function _getOwner() public view returns (address owner) {
    bytes32 position = OWNER_POSITION;
    
    assembly {
      owner := sload(position)
    }
  }

  function _setOwner(address newOwner) private {
    require(newOwner != address(0), "owner cannot be 0");
    bytes32 position = OWNER_POSITION;
    
    assembly {
      sstore(position, newOwner)
    }
    emit OwnerSet(newOwner);
  }
}

contract ElectionProxy is Proxy {}

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":"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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