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Gas: 30 Gwei

Contract

0x8Ab7404063Ec4DBcfd4598215992DC3F8EC853d7
 
Transaction Hash
Method
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0x1fa7e1b22dbd1571ffcbbc1e2b3c4b7bb20323ae044834dd2615c61a848fa08bApprove(pending)2024-02-04 1:37:1120 days 18 hrs ago1707010631IN
Akropolis: AKRO Token
0 ETH(Pending)(Pending)
0xd058751535036f16c6382bf2c8d46ab6180f139d8000459dd7688831e1339ceaTransfer(pending)2024-01-21 6:30:3834 days 13 hrs ago1705818638IN
Akropolis: AKRO Token
0 ETH(Pending)(Pending)
0xc87789675b609474ffde5c17ff218eb6d6c78b73b4975bae76baf20df46be712Approve(pending)2024-01-21 3:58:5534 days 16 hrs ago1705809535IN
Akropolis: AKRO Token
0 ETH(Pending)(Pending)
Transfer192977702024-02-24 13:33:476 hrs 43 mins ago1708781627IN
Akropolis: AKRO Token
0 ETH0.0017240327.76544132
Transfer192975972024-02-24 12:59:117 hrs 17 mins ago1708779551IN
Akropolis: AKRO Token
0 ETH0.0020619633.21413388
Transfer192969612024-02-24 10:50:599 hrs 25 mins ago1708771859IN
Akropolis: AKRO Token
0 ETH0.0017631123.69999822
Transfer192965162024-02-24 9:20:4710 hrs 56 mins ago1708766447IN
Akropolis: AKRO Token
0 ETH0.0016789129.3040385
Transfer192965112024-02-24 9:19:4710 hrs 57 mins ago1708766387IN
Akropolis: AKRO Token
0 ETH0.0021936929.49266223
Transfer192961692024-02-24 8:11:2312 hrs 5 mins ago1708762283IN
Akropolis: AKRO Token
0 ETH0.0024866531.3999808
Transfer192959642024-02-24 7:30:2312 hrs 46 mins ago1708759823IN
Akropolis: AKRO Token
0 ETH0.0018910633
Transfer192958412024-02-24 7:05:4713 hrs 11 mins ago1708758347IN
Akropolis: AKRO Token
0 ETH0.0014720125.68740117
Transfer192951652024-02-24 4:49:3515 hrs 27 mins ago1708750175IN
Akropolis: AKRO Token
0 ETH0.001515220.36753681
Transfer192928992024-02-23 21:13:3523 hrs 3 mins ago1708722815IN
Akropolis: AKRO Token
0 ETH0.0041354452.22774257
Transfer192928332024-02-23 21:00:1123 hrs 16 mins ago1708722011IN
Akropolis: AKRO Token
0 ETH0.0021716437.89626766
Transfer192927642024-02-23 20:46:2323 hrs 30 mins ago1708721183IN
Akropolis: AKRO Token
0 ETH0.0021692234.94188435
Transfer192927292024-02-23 20:39:2323 hrs 37 mins ago1708720763IN
Akropolis: AKRO Token
0 ETH0.0020083635.05428933
Approve192921792024-02-23 18:48:471 day 1 hr ago1708714127IN
Akropolis: AKRO Token
0 ETH0.0022910334.80340469
Transfer192919652024-02-23 18:05:591 day 2 hrs ago1708711559IN
Akropolis: AKRO Token
0 ETH0.0030899739.03007622
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Akropolis: AKRO Token
0 ETH0.0032459241
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Akropolis: AKRO Token
0 ETH0.0065387482.57978494
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Akropolis: AKRO Token
0 ETH0.0021950438.3125753
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Akropolis: AKRO Token
0 ETH0.0024006232.26953912
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Akropolis: AKRO Token
0 ETH0.003215956.13084162
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Akropolis: AKRO Token
0 ETH0.004452856.22723726
Transfer192891632024-02-23 8:40:471 day 11 hrs ago1708677647IN
Akropolis: AKRO Token
0 ETH0.0030792449.5812368
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x2713b9...68B7c803
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
TokenProxy

Compiler Version
v0.4.24+commit.e67f0147

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2019-06-30
*/

/*
  Akropolis Token, https://akropolis.io
*/
pragma solidity ^0.4.24;

// File: openzeppelin-solidity/contracts/math/SafeMath.sol

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
    // Gas optimization: this is cheaper than asserting 'a' not being zero, but the
    // benefit is lost if 'b' is also tested.
    // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
    if (_a == 0) {
      return 0;
    }

    c = _a * _b;
    assert(c / _a == _b);
    return c;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
    // assert(_b > 0); // Solidity automatically throws when dividing by 0
    // uint256 c = _a / _b;
    // assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold
    return _a / _b;
  }

  /**
  * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
    assert(_b <= _a);
    return _a - _b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
    c = _a + _b;
    assert(c >= _a);
    return c;
  }
}

// File: contracts/helpers/Ownable.sol

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions". This adds two-phase
 * ownership control to OpenZeppelin's Ownable class. In this model, the original owner 
 * designates a new owner but does not actually transfer ownership. The new owner then accepts 
 * ownership and completes the transfer.
 */
contract Ownable {
    address public owner;
    address public pendingOwner;


    event OwnershipTransferred(
      address indexed previousOwner,
      address indexed newOwner
    );


    /**
    * @dev The Ownable constructor sets the original `owner` of the contract to the sender
    * account.
    */
    constructor() public {
        owner = msg.sender;
        pendingOwner = address(0);
    }

    /**
    * @dev Throws if called by any account other than the owner.
    */
    modifier onlyOwner() {
        require(msg.sender == owner, "Account is not owner");
        _;
    }

    /**
    * @dev Throws if called by any account other than the owner.
    */
    modifier onlyPendingOwner() {
        require(msg.sender == pendingOwner, "Account is not pending owner");
        _;
    }

    /**
    * @dev Allows the current owner to transfer control of the contract to a newOwner.
    * @param _newOwner The address to transfer ownership to.
    */
    function transferOwnership(address _newOwner) public onlyOwner {
        require(_newOwner != address(0), "Empty address");
        pendingOwner = _newOwner;
    }

    /**
    * @dev Allows the pendingOwner address to finalize the transfer.
    */
    function claimOwnership() onlyPendingOwner public {
        emit OwnershipTransferred(owner, pendingOwner);
        owner = pendingOwner;
        pendingOwner = address(0);
    }
}

// File: contracts/token/dataStorage/AllowanceSheet.sol

/**
* @title AllowanceSheet
* @notice A wrapper around an allowance mapping. 
*/
contract AllowanceSheet is Ownable {
    using SafeMath for uint256;

    mapping (address => mapping (address => uint256)) public allowanceOf;

    function addAllowance(address _tokenHolder, address _spender, uint256 _value) public onlyOwner {
        allowanceOf[_tokenHolder][_spender] = allowanceOf[_tokenHolder][_spender].add(_value);
    }

    function subAllowance(address _tokenHolder, address _spender, uint256 _value) public onlyOwner {
        allowanceOf[_tokenHolder][_spender] = allowanceOf[_tokenHolder][_spender].sub(_value);
    }

    function setAllowance(address _tokenHolder, address _spender, uint256 _value) public onlyOwner {
        allowanceOf[_tokenHolder][_spender] = _value;
    }
}

// File: contracts/token/dataStorage/BalanceSheet.sol

/**
* @title BalanceSheet
* @notice A wrapper around the balanceOf mapping. 
*/
contract BalanceSheet is Ownable {
    using SafeMath for uint256;

    mapping (address => uint256) public balanceOf;
    uint256 public totalSupply;

    function addBalance(address _addr, uint256 _value) public onlyOwner {
        balanceOf[_addr] = balanceOf[_addr].add(_value);
    }

    function subBalance(address _addr, uint256 _value) public onlyOwner {
        balanceOf[_addr] = balanceOf[_addr].sub(_value);
    }

    function setBalance(address _addr, uint256 _value) public onlyOwner {
        balanceOf[_addr] = _value;
    }

    function addTotalSupply(uint256 _value) public onlyOwner {
        totalSupply = totalSupply.add(_value);
    }

    function subTotalSupply(uint256 _value) public onlyOwner {
        totalSupply = totalSupply.sub(_value);
    }

    function setTotalSupply(uint256 _value) public onlyOwner {
        totalSupply = _value;
    }
}

// File: contracts/token/dataStorage/TokenStorage.sol

/**
* @title TokenStorage
*/
contract TokenStorage {
    /**
        Storage
    */
    BalanceSheet public balances;
    AllowanceSheet public allowances;


    string public name;   //name of Token                
    uint8  public decimals;        //decimals of Token        
    string public symbol;   //Symbol of Token

    /**
    * @dev a TokenStorage consumer can set its storages only once, on construction
    *
    **/
    constructor (address _balances, address _allowances, string _name, uint8 _decimals, string _symbol) public {
        balances = BalanceSheet(_balances);
        allowances = AllowanceSheet(_allowances);

        name = _name;
        decimals = _decimals;
        symbol = _symbol;
    }

    /**
    * @dev claim ownership of balance sheet passed into constructor.
    **/
    function claimBalanceOwnership() public {
        balances.claimOwnership();
    }

    /**
    * @dev claim ownership of allowance sheet passed into constructor.
    **/
    function claimAllowanceOwnership() public {
        allowances.claimOwnership();
    }
}

// File: zos-lib/contracts/upgradeability/Proxy.sol

/**
 * @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-solidity/contracts/AddressUtils.sol

/**
 * Utility library of inline functions on addresses
 */
library AddressUtils {

  /**
   * 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 _addr address to check
   * @return whether the target address is a contract
   */
  function isContract(address _addr) 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.
    // solium-disable-next-line security/no-inline-assembly
    assembly { size := extcodesize(_addr) }
    return size > 0;
  }

}

// File: zos-lib/contracts/upgradeability/UpgradeabilityProxy.sol

/**
 * @title UpgradeabilityProxy
 * @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 UpgradeabilityProxy is Proxy {
  /**
   * @dev Emitted when the implementation is upgraded.
   * @param implementation Address of the new implementation.
   */
  event Upgraded(address implementation);

  /**
   * @dev Storage slot with the address of the current implementation.
   * This is the keccak-256 hash of "org.zeppelinos.proxy.implementation", and is
   * validated in the constructor.
   */
  bytes32 private constant IMPLEMENTATION_SLOT = 0x7050c9e0f4ca769c69bd3a8ef740bc37934f8e2c036e5a723fd8ee048ed3f8c3;

  /**
   * @dev Contract constructor.
   * @param _implementation Address of the initial implementation.
   */
  constructor(address _implementation) public {
    assert(IMPLEMENTATION_SLOT == keccak256("org.zeppelinos.proxy.implementation"));

    _setImplementation(_implementation);
  }

  /**
   * @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) private {
    require(AddressUtils.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");

    bytes32 slot = IMPLEMENTATION_SLOT;

    assembly {
      sstore(slot, newImplementation)
    }
  }
}

// File: contracts/token/TokenProxy.sol

/**
* @title TokenProxy
* @notice A proxy contract that serves the latest implementation of TokenProxy.
*/
contract TokenProxy is UpgradeabilityProxy, TokenStorage, Ownable {
    constructor(address _implementation, address _balances, address _allowances, string _name, uint8 _decimals, string _symbol) 
    UpgradeabilityProxy(_implementation) 
    TokenStorage(_balances, _allowances, _name, _decimals, _symbol) public {
    }

    /**
    * @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) public onlyOwner {
        _upgradeTo(newImplementation);
    }

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

Contract Security Audit

Contract ABI

[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"allowances","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"claimOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"implementation","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"balances","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"claimBalanceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"claimAllowanceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"pendingOwner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_implementation","type":"address"},{"name":"_balances","type":"address"},{"name":"_allowances","type":"address"},{"name":"_name","type":"string"},{"name":"_decimals","type":"uint8"},{"name":"_symbol","type":"string"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"},{"indexed":true,"name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"implementation","type":"address"}],"name":"Upgraded","type":"event"}]

Deployed Bytecode

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Swarm Source

bzzr://0d4288eba87042df8f111b7c474e27a7d7b5df8cedf1c4d4f471b77da426ba40

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Txn Hash Block Value Eth2 PubKey Valid
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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.