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// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

import './interfaces/IERC20.sol';

interface IStaking {
    function stake( uint _amount, address _recipient ) external returns ( bool );
    function claim( address _recipient ) external;
}

contract StakingHelper {

    address public immutable staking;
    address public immutable ROME;

    constructor ( address _staking, address _ROME ) {
        require( _staking != address(0) );
        staking = _staking;
        require( _ROME != address(0) );
        ROME = _ROME;
    }

    function stake( uint _amount , address _recipient ) external {
        IERC20( ROME ).transferFrom( msg.sender, address(this), _amount );
        IERC20( ROME ).approve( staking, _amount );
        IStaking( staking ).stake( _amount, _recipient );
        IStaking( staking ).claim( _recipient );
    }
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.7.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 9999
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"address","name":"_staking","type":"address"},{"internalType":"address","name":"_ROME","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ROME","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_recipient","type":"address"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"staking","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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

0000000000000000000000006f7d019502e17f1ef24ac67a260c65dd23b759f10000000000000000000000004a436073552044d5f2f49b176853ad3ad473d9d6

-----Decoded View---------------
Arg [0] : _staking (address): 0x6f7D019502e17F1ef24AC67a260c65Dd23b759f1
Arg [1] : _ROME (address): 0x4a436073552044D5f2f49B176853ad3Ad473d9d6

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000006f7d019502e17f1ef24ac67a260c65dd23b759f1
Arg [1] : 0000000000000000000000004a436073552044d5f2f49b176853ad3ad473d9d6