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0xC08512927D12348F6620a698105e1BAac6EcD911
 

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Contract Source Code Verified (Exact Match)

Contract Name:
GYEN

Compiler Version
v0.5.8+commit.23d335f2

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license
/**
 *Submitted for verification at Etherscan.io on 2019-12-12
*/

// 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);
  }
}

// File: contracts/GYEN.sol

pragma solidity 0.5.8;


contract GYEN is AdminUpgradeabilityProxy {

    constructor(address _logic, address _admin, bytes memory _data) public payable AdminUpgradeabilityProxy(_logic, _admin, _data) {}

}

Contract Security Audit

Contract ABI

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Deployed Bytecode

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

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

-----Decoded View---------------
Arg [0] : _logic (address): 0x37a41D9f7C94e5d13fba30c59f28cc0E803EdcE4
Arg [1] : _admin (address): 0xe418cE09763d13692516fab7160324B01e04b223
Arg [2] : _data (bytes): 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

-----Encoded View---------------
19 Constructor Arguments found :
Arg [0] : 00000000000000000000000037a41d9f7c94e5d13fba30c59f28cc0e803edce4
Arg [1] : 000000000000000000000000e418ce09763d13692516fab7160324b01e04b223
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [3] : 00000000000000000000000000000000000000000000000000000000000001c4
Arg [4] : b89da64200000000000000000000000000000000000000000000000000000000
Arg [5] : 0000014000000000000000000000000000000000000000000000000000000000
Arg [6] : 0000018000000000000000000000000000000000000000000000000000000000
Arg [7] : 00000006000000000000000000000000fb5dae5bf48df4492b3101f00d844ef1
Arg [8] : c0268c6d0000000000000000000000007037368343299af3e9a9708337f6690d
Arg [9] : 65efa517000000000000000000000000b95ab58084a131197da608e4a28511c4
Arg [10] : c8bd410a00000000000000000000000072fe98091d3acbb31558c9f1be320714
Arg [11] : 96ee90cf000000000000000000000000e73b7624652782238cbb7a590a95ded5
Arg [12] : 0df2fc400000000000000000000000001e412adeac1e3a213d43a968b938ac04
Arg [13] : 6f506de3000000000000000000000000ed816bc633a6931f60b9ae5a7f2a4ace
Arg [14] : c44fb8bd00000000000000000000000000000000000000000000000000000000
Arg [15] : 00000007474d4f204a5059000000000000000000000000000000000000000000
Arg [16] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [17] : 000000044759454e000000000000000000000000000000000000000000000000
Arg [18] : 0000000000000000000000000000000000000000000000000000000000000000


Deployed Bytecode Sourcemap

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Swarm Source

bzzr://81188e099819a6cc165f8fa97861c8e50679d3c8eb6e93b3a85dc2ced726b9ff

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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OVERVIEW

GYEN anchors its value to the price of the Japanese Yen. Redeemable and pegged 1-to-1 with fiat currency to virtually eliminate volatility, while still benefiting from the advantages of cryptocurrency, such as high-speed transaction and low costs, especially for cross-border payments.

Validator Index Block Amount
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Transaction 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.