// File: Context.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}
// File: CRDAirdrop.sol



// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.4;

import "./Ownable.sol";

interface IERC20 { 
   function transfer(address recipient, uint256 amount) external returns (bool); 
   function balanceOf(address account) external view returns (uint256);
} 

contract CRDNetworkAirdropV1 is Ownable {
  
    mapping (address => bool) private isAdmin;
    mapping (address => bool) private addressRecord;
    
    address public tokenAddress;
    uint public rewardAmount;
    
    constructor(address _tokenAddress, uint _rewardAmount) Ownable() {
        tokenAddress = _tokenAddress;
        rewardAmount = _rewardAmount;
        isAdmin[_msgSender()] = true;
    }

    modifier onlyAdmin() {
        require(isAdmin[msg.sender]);
        _;
    }
    
    function claimReward() public { 
        require (addressRecord[msg.sender]  == true);  
        IERC20(tokenAddress).transfer(msg.sender, rewardAmount); 
        addressRecord[msg.sender] = false; 
    }
    
    function setReward(uint _rewardAmount) public onlyAdmin { 
        rewardAmount = _rewardAmount; 
    }
    
    function setToken(address  _tokenAddress) public onlyAdmin { 
        tokenAddress = _tokenAddress; 
    }

    function setAccounts(address[] memory _records) public onlyAdmin { 
        for(uint i=0; i< _records.length; i++){
           addressRecord[_records[i]] = true;
        } 
    }
    
    function checkStatus(address  _address) public view returns(bool, uint) { 
        return (addressRecord[_address], rewardAmount);
    }
    
    function transferToken(  uint _amount) public  onlyAdmin returns (bool){  
        IERC20(tokenAddress).transfer(msg.sender, _amount);
        return true;
    }  
       
}

// File: Ownable.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _setOwner(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}