Contract 0x4C39b37f5F20a0695BFDC59cf10bd85a6c4B7c30

 
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0xb0e589bccb2857830a1668871dea4d2b1785927240655481a120d4683cdfee11Transfer Ownersh...130091282021-08-12 7:55:32416 days 5 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.0016915347
0x44b6f0ebf7a8ebd4e51f4c04582f5d54a976e48e0c80bdafc3f884d755b2ab74Set111257552020-10-25 13:02:20707 days 48 mins agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.0039437725
0x440904cb6ea21d79726e4ad447832303f9ee3e766043728bcb73fff622563de4Set111252862020-10-25 11:20:09707 days 2 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.0055273735
0x6e7773df88f5e93e5ff97457826313da9d6944eea777ad3919f13bb7b4704963Set108391572020-09-11 7:16:29751 days 6 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.03312519210
0xd62f8a86eed1e438c22ddc0ded436777ae5d88dc72563f4f89d79adc0ef951ebSet108391522020-09-11 7:15:54751 days 6 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.03312519210
0x3285f9f9e2e0e0c950974bd1095522777be85442a0af9f9b54f6aff9c04f469aSet108391472020-09-11 7:14:57751 days 6 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.03313023210
0x09dd1387346633dd160bb5cbfaa3f7c12455481d6ff5eb55a2863a25f7ca28ceSet108140672020-09-07 10:49:39755 days 3 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.0126241680
0xe5b5a9668ce8d78f9bd443e838c4c4aae94c39d39c42a16593a24e8100f02fa4Transfer Ownersh...108140612020-09-07 10:48:39755 days 3 hrs ago0x509e16558f1fdc4733efa73846da891a29797e43 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.0030972792
0x2c60ad3cc8ac75fd93830da3494325bb19f9d3255a0446fd8c6c9e211bab88f0Transfer Ownersh...107943042020-09-04 10:30:42758 days 3 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.0087594260
0x89a81b47686145f8226d8248be8fa1c212604c7e9e8412ee82ae8b6248a0dd52Set107942652020-09-04 10:19:37758 days 3 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.04103476260
0x48a654491b5044049dcdbb0c626eff70c0d85b1388ccfb6ff47975835e318d91Transfer Ownersh...107942502020-09-04 10:15:20758 days 3 hrs ago0x4454fc25daf515d1237d0ea76ac3ea931118eef0 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.01252375372
0x4d09e620e1fcf3b0644ba30f38281d0cca84aef50c89ee2aacb00a86381bba1bTransfer Ownersh...107356892020-08-26 11:06:15767 days 2 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.002695280
0x78db0c2faf7f2917d179b2d3324ea5f9872dfe6d6e653995da1d3547aebcb3a3Set106445042020-08-12 10:13:37781 days 3 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.0347105220
0x2845f7991f1a6e260b0586dfd425f3bbc0594f61dacc1ac37980ee69b2cff11fSet106445002020-08-12 10:12:51781 days 3 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.0347105220
0x5bd6c367dbdcc3dfcfe92aec1d087de56985ecea4cc6b0987ca182cc4c107f7bSet106444982020-08-12 10:12:19781 days 3 hrs agoAkropolis: Deployer 2 IN  0x4c39b37f5f20a0695bfdc59cf10bd85a6c4b7c300 Ether0.0359095220
0x4c4bd6fef5cc69fc0f63c8f01fbe08c86a9bb6af2665a4b318c056c237db9cb20x60806040106443552020-08-12 9:41:37781 days 4 hrs agoAkropolis: Deployer 2 IN  Contract Creation0 Ether0.14624742220
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x7baf06a99f4934b61a1d129af587b9e9746c77f5

Contract Name:
AdminUpgradeabilityProxy

Compiler Version
v0.5.3+commit.10d17f24

Optimization Enabled:
No with 200 runs

Other Settings:
constantinople EvmVersion, MIT license
/**
 *Submitted for verification at Etherscan.io on 2020-02-19
*/

// File: @openzeppelin/upgrades/contracts/upgradeability/Proxy.sol

pragma solidity ^0.5.0;

/**
 * @title Proxy
 * @dev Implements delegation of calls to other contracts, with proper
 * forwarding of return values and bubbling of failures.
 * It defines a fallback function that delegates all calls to the address
 * returned by the abstract _implementation() internal function.
 */
contract Proxy {
  /**
   * @dev Fallback function.
   * Implemented entirely in `_fallback`.
   */
  function () payable external {
    _fallback();
  }

  /**
   * @return The Address of the implementation.
   */
  function _implementation() internal view returns (address);

  /**
   * @dev Delegates execution to an implementation contract.
   * This is a low level function that doesn't return to its internal call site.
   * It will return to the external caller whatever the implementation returns.
   * @param implementation Address to delegate.
   */
  function _delegate(address implementation) internal {
    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) }
    }
  }

  /**
   * @dev Function that is run as the first thing in the fallback function.
   * Can be redefined in derived contracts to add functionality.
   * Redefinitions must call super._willFallback().
   */
  function _willFallback() internal {
  }

  /**
   * @dev fallback implementation.
   * Extracted to enable manual triggering.
   */
  function _fallback() internal {
    _willFallback();
    _delegate(_implementation());
  }
}

// File: @openzeppelin/upgrades/contracts/utils/Address.sol

pragma solidity ^0.5.0;

/**
 * Utility library of inline functions on addresses
 *
 * Source https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-solidity/v2.1.3/contracts/utils/Address.sol
 * This contract is copied here and renamed from the original to avoid clashes in the compiled artifacts
 * when the user imports a zos-lib contract (that transitively causes this contract to be compiled and added to the
 * build/artifacts folder) as well as the vanilla Address implementation from an openzeppelin version.
 */
library OpenZeppelinUpgradesAddress {
    /**
     * Returns whether the target address is a contract
     * @dev This function will return false if invoked during the constructor of a contract,
     * as the code is not actually created until after the constructor finishes.
     * @param account address of the account to check
     * @return whether the target address is a contract
     */
    function isContract(address account) internal view returns (bool) {
        uint256 size;
        // XXX Currently there is no better way to check if there is a contract in an address
        // than to check the size of the code at that address.
        // See https://ethereum.stackexchange.com/a/14016/36603
        // for more details about how this works.
        // TODO Check this again before the Serenity release, because all addresses will be
        // contracts then.
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }
}

// File: @openzeppelin/upgrades/contracts/upgradeability/BaseUpgradeabilityProxy.sol

pragma solidity ^0.5.0;



/**
 * @title BaseUpgradeabilityProxy
 * @dev This contract implements a proxy that allows to change the
 * implementation address to which it will delegate.
 * Such a change is called an implementation upgrade.
 */
contract BaseUpgradeabilityProxy is Proxy {
  /**
   * @dev Emitted when the implementation is upgraded.
   * @param implementation Address of the new implementation.
   */
  event Upgraded(address indexed implementation);

  /**
   * @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 Returns the current implementation.
   * @return Address of the current implementation
   */
  function _implementation() internal view returns (address impl) {
    bytes32 slot = IMPLEMENTATION_SLOT;
    assembly {
      impl := sload(slot)
    }
  }

  /**
   * @dev Upgrades the proxy to a new implementation.
   * @param newImplementation Address of the new implementation.
   */
  function _upgradeTo(address newImplementation) internal {
    _setImplementation(newImplementation);
    emit Upgraded(newImplementation);
  }

  /**
   * @dev Sets the implementation address of the proxy.
   * @param newImplementation Address of the new implementation.
   */
  function _setImplementation(address newImplementation) internal {
    require(OpenZeppelinUpgradesAddress.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");

    bytes32 slot = IMPLEMENTATION_SLOT;

    assembly {
      sstore(slot, newImplementation)
    }
  }
}

// File: @openzeppelin/upgrades/contracts/upgradeability/UpgradeabilityProxy.sol

pragma solidity ^0.5.0;


/**
 * @title UpgradeabilityProxy
 * @dev Extends BaseUpgradeabilityProxy with a constructor for initializing
 * implementation and init data.
 */
contract UpgradeabilityProxy is BaseUpgradeabilityProxy {
  /**
   * @dev Contract constructor.
   * @param _logic Address of the initial implementation.
   * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
   * It should include the signature and the parameters of the function to be called, as described in
   * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
   * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
   */
  constructor(address _logic, bytes memory _data) public payable {
    assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
    _setImplementation(_logic);
    if(_data.length > 0) {
      (bool success,) = _logic.delegatecall(_data);
      require(success);
    }
  }  
}

// File: @openzeppelin/upgrades/contracts/upgradeability/BaseAdminUpgradeabilityProxy.sol

pragma solidity ^0.5.0;


/**
 * @title BaseAdminUpgradeabilityProxy
 * @dev This contract combines an upgradeability proxy with an authorization
 * mechanism for administrative tasks.
 * All external functions in this contract must be guarded by the
 * `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
 * feature proposal that would enable this to be done automatically.
 */
contract BaseAdminUpgradeabilityProxy is BaseUpgradeabilityProxy {
  /**
   * @dev Emitted when the administration has been transferred.
   * @param previousAdmin Address of the previous admin.
   * @param newAdmin Address of the new admin.
   */
  event AdminChanged(address previousAdmin, address newAdmin);

  /**
   * @dev Storage slot with the admin of the contract.
   * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
   * validated in the constructor.
   */

  bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

  /**
   * @dev Modifier to check whether the `msg.sender` is the admin.
   * If it is, it will run the function. Otherwise, it will delegate the call
   * to the implementation.
   */
  modifier ifAdmin() {
    if (msg.sender == _admin()) {
      _;
    } else {
      _fallback();
    }
  }

  /**
   * @return The address of the proxy admin.
   */
  function admin() external ifAdmin returns (address) {
    return _admin();
  }

  /**
   * @return The address of the implementation.
   */
  function implementation() external ifAdmin returns (address) {
    return _implementation();
  }

  /**
   * @dev Changes the admin of the proxy.
   * Only the current admin can call this function.
   * @param newAdmin Address to transfer proxy administration to.
   */
  function changeAdmin(address newAdmin) external ifAdmin {
    require(newAdmin != address(0), "Cannot change the admin of a proxy to the zero address");
    emit AdminChanged(_admin(), newAdmin);
    _setAdmin(newAdmin);
  }

  /**
   * @dev Upgrade the backing implementation of the proxy.
   * Only the admin can call this function.
   * @param newImplementation Address of the new implementation.
   */
  function upgradeTo(address newImplementation) external ifAdmin {
    _upgradeTo(newImplementation);
  }

  /**
   * @dev Upgrade the backing implementation of the proxy and call a function
   * on the new implementation.
   * This is useful to initialize the proxied contract.
   * @param newImplementation Address of the new implementation.
   * @param data Data to send as msg.data in the low level call.
   * It should include the signature and the parameters of the function to be called, as described in
   * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
   */
  function upgradeToAndCall(address newImplementation, bytes calldata data) payable external ifAdmin {
    _upgradeTo(newImplementation);
    (bool success,) = newImplementation.delegatecall(data);
    require(success);
  }

  /**
   * @return The admin slot.
   */
  function _admin() internal view returns (address adm) {
    bytes32 slot = ADMIN_SLOT;
    assembly {
      adm := sload(slot)
    }
  }

  /**
   * @dev Sets the address of the proxy admin.
   * @param newAdmin Address of the new proxy admin.
   */
  function _setAdmin(address newAdmin) internal {
    bytes32 slot = ADMIN_SLOT;

    assembly {
      sstore(slot, newAdmin)
    }
  }

  /**
   * @dev Only fall back when the sender is not the admin.
   */
  function _willFallback() internal {
    require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
    super._willFallback();
  }
}

// File: @openzeppelin/upgrades/contracts/upgradeability/AdminUpgradeabilityProxy.sol

pragma solidity ^0.5.0;


/**
 * @title AdminUpgradeabilityProxy
 * @dev Extends from BaseAdminUpgradeabilityProxy with a constructor for 
 * initializing the implementation, admin, and init data.
 */
contract AdminUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, UpgradeabilityProxy {
  /**
   * Contract constructor.
   * @param _logic address of the initial implementation.
   * @param _admin Address of the proxy administrator.
   * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
   * It should include the signature and the parameters of the function to be called, as described in
   * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
   * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
   */
  constructor(address _logic, address _admin, bytes memory _data) UpgradeabilityProxy(_logic, _data) public payable {
    assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
    _setAdmin(_admin);
  }
}

Contract Security Audit

Contract ABI

[{"constant":false,"inputs":[{"name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newImplementation","type":"address"},{"name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[],"name":"implementation","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"admin","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_logic","type":"address"},{"name":"_admin","type":"address"},{"name":"_data","type":"bytes"}],"payable":true,"stateMutability":"payable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"previousAdmin","type":"address"},{"indexed":false,"name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"implementation","type":"address"}],"name":"Upgraded","type":"event"}]

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Deployed ByteCode Sourcemap

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Swarm Source

bzzr://3a61cbfff803b053d8f397cf95cfa0c8c53ef12ce921c5d484b275b58be38897
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.