Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta

Outline

• interface IERC20
•    - function totalSupply()
•    - function balanceOf(address account)
•    - function transfer(address recipient, ...
•    - function allowance(address owner, add ...
•    - function approve(address spender, uin ...
•    - function transferFrom(address sender, ...
•    - function _msgSender()
•    - function _msgData()
•  contract Ownable is Context
•    - function owner()
•    - function renounceOwnership()
•    - function transferOwnership(address ne ...
• interface IComet
•    - function claim(address to, uint amoun ...
•    - function unit()
•    - function token()
•    - function balance()
•  contract NativeTokenComet is ICome ... *
•    - function claim(address to, uint256 am ...
•    - function unit()
•    - function token()
•    - function balance()
•    - function withdraw()

More Options

• Similar
• Submit Audit
• Compare

/**
 *Submitted for verification at polygonscan.com on 2021-06-30
*/

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @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);
}

// File: @openzeppelin/contracts/GSN/Context.sol



pragma solidity ^0.6.0;

/*
 * @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 GSN 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 payable) {
        return 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;
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



pragma solidity ^0.6.0;

/**
 * @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.
 */
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 () internal {
        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(), "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 {
        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), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: contracts/interface/IComet.sol



pragma solidity ^0.6.0;

// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol";


interface IComet {
    function claim(address to, uint amount) external;
    function unit() external view returns (uint256);
    function token() external view returns (address);
    function balance() external view returns (uint256);
}

// File: contracts/comets/NativeTokenComet.sol



pragma solidity ^0.6.0;

// import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol";




contract NativeTokenComet is IComet, Ownable {
    uint256 _unit;
    address _game;

    constructor(
        address game,
        uint256 unit
    ) public {
        _game = game;
        _unit = unit;
    }

    function claim(address to, uint256 amount) public override {
        require(msg.sender == _game, "only game can claim");
        payable(to).transfer(amount);
    }

    function unit() public view override returns (uint256) {
        return _unit;
    }

    function token() public view override returns (address) {
        return address(0);
    }

    function balance() public view override returns (uint256) {
        return address(this).balance;
    }

    function withdraw() onlyOwner external {
        payable(owner()).transfer(address(this).balance);
    }

    receive() external payable {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"game","type":"address"},{"internalType":"uint256","name":"unit","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"balance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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