/*

Airdrop contract
                                    
*/                                    

// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.18;

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode 
              // - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}


interface IERC20 {

    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);
}



/**
 * @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;
    address private _previousOwner;
    
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Not 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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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), "Renounced");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }

}


contract Airdrop is Ownable {
    IERC20 public token;

    event AirdropRBITS(address indexed recipient, uint256 amount);
    event RescueETH(uint256 amount, address beneficiary);
    event RescueERC20(uint256 amount, address tokenAddress);
    event WithdrawTokens(uint256 amount);

    constructor() {}

    function setTokenAddress(address newTokenContract) external onlyOwner() {
        token = IERC20(newTokenContract);
    }

    function airdrop(address[] memory recipients, uint256[] memory amounts) external onlyOwner {
        require(recipients.length == amounts.length, "Arrays length mismatch");

        for (uint256 i = 0; i < recipients.length; i++) {
            require(recipients[i] != address(0), "Invalid recipient address");
            require(amounts[i] > 0, "Invalid airdrop amount");

            // Transfer tokens to the recipient
            token.transfer(recipients[i], amounts[i]);

            // Emit the airdrop event
            emit AirdropRBITS(recipients[i], amounts[i]);
        }
    }

    function withdrawTokens(uint256 amount) external onlyOwner {
        // Allow the owner to withdraw any remaining tokens in the contract
        token.transfer(owner(), amount);

        emit WithdrawTokens( amount );
    }

    // rescue ETH accidently sent to contract address
    function rescueETH(uint256 amount, address beneficiary) external onlyOwner {
        payable( beneficiary ).transfer(amount);

        emit RescueETH(amount, beneficiary );
    }

    // rescue tokens accidently sent to contract address
    function rescueERC20(address tokenAddress) external onlyOwner() {
        require(tokenAddress != address(token));

        IERC20 tok = IERC20(tokenAddress);
        uint256 amount = tok.balanceOf(address(this));
        require(amount > 0);

        bool success = tok.transfer(owner(), amount);
        require(success);

        emit RescueERC20( amount, tokenAddress );
    }
}

{
  "compilationTarget": {
    "Airdrop.sol": "Airdrop"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}