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Contract

0xC772C3d5B802973e48B13E7c112d74db4919215F
 

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Block
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Betting303532912026-01-27 12:19:577 hrs ago1769516397IN
0xC772C3d5...b4919215F
0 ETH0.000009810.00100025
Betting303525492026-01-27 11:55:138 hrs ago1769514913IN
0xC772C3d5...b4919215F
0 ETH0.000001810.00100027
Betting303525332026-01-27 11:54:418 hrs ago1769514881IN
0xC772C3d5...b4919215F
0 ETH0.000001980.00100027
Betting303525312026-01-27 11:54:378 hrs ago1769514877IN
0xC772C3d5...b4919215F
0 ETH0.000001840.00100027
Betting303525302026-01-27 11:54:358 hrs ago1769514875IN
0xC772C3d5...b4919215F
0 ETH0.000001840.00100027
Betting303525292026-01-27 11:54:338 hrs ago1769514873IN
0xC772C3d5...b4919215F
0 ETH0.000001850.00100027
Betting303525282026-01-27 11:54:318 hrs ago1769514871IN
0xC772C3d5...b4919215F
0 ETH0.000001840.00100027
Betting303525262026-01-27 11:54:278 hrs ago1769514867IN
0xC772C3d5...b4919215F
0 ETH0.000001830.00100027
Betting303525142026-01-27 11:54:038 hrs ago1769514843IN
0xC772C3d5...b4919215F
0 ETH0.000001650.00100027
Betting303525022026-01-27 11:53:398 hrs ago1769514819IN
0xC772C3d5...b4919215F
0 ETH0.000002150.00100027
Betting303524952026-01-27 11:53:258 hrs ago1769514805IN
0xC772C3d5...b4919215F
0 ETH0.000002130.00100027
Betting303524932026-01-27 11:53:218 hrs ago1769514801IN
0xC772C3d5...b4919215F
0 ETH0.000002120.00100027
Betting303524152026-01-27 11:50:458 hrs ago1769514645IN
0xC772C3d5...b4919215F
0 ETH0.000002060.00100027
Betting303496452026-01-27 10:18:259 hrs ago1769509105IN
0xC772C3d5...b4919215F
0 ETH0.000001310.00100031
Betting303493252026-01-27 10:07:459 hrs ago1769508465IN
0xC772C3d5...b4919215F
0 ETH0.000001180.00100032
Betting303493162026-01-27 10:07:279 hrs ago1769508447IN
0xC772C3d5...b4919215F
0 ETH0.000001130.00100032
Betting303492772026-01-27 10:06:099 hrs ago1769508369IN
0xC772C3d5...b4919215F
0 ETH0.000001410.00100032
Betting303492682026-01-27 10:05:519 hrs ago1769508351IN
0xC772C3d5...b4919215F
0 ETH0.000001340.00100032
Betting303492632026-01-27 10:05:419 hrs ago1769508341IN
0xC772C3d5...b4919215F
0 ETH0.000001360.00100032
Betting303492362026-01-27 10:04:479 hrs ago1769508287IN
0xC772C3d5...b4919215F
0 ETH0.000001080.00100032
Betting303492202026-01-27 10:04:159 hrs ago1769508255IN
0xC772C3d5...b4919215F
0 ETH0.00000120.00100032
Betting303489722026-01-27 9:55:599 hrs ago1769507759IN
0xC772C3d5...b4919215F
0 ETH0.000001340.00100036
Betting303487322026-01-27 9:47:5910 hrs ago1769507279IN
0xC772C3d5...b4919215F
0 ETH0.000000970.00100033
Betting303464422026-01-27 8:31:3911 hrs ago1769502699IN
0xC772C3d5...b4919215F
0 ETH0.00000080.00100032
Betting303462462026-01-27 8:25:0711 hrs ago1769502307IN
0xC772C3d5...b4919215F
0 ETH0.000000810.00100029
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Contract Source Code Verified (Exact Match)

Contract Name:
Keno

Compiler Version
v0.8.28+commit.7893614a

Optimization Enabled:
No with 200 runs

Other Settings:
cancun EvmVersion
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "./abstract/GameBase.sol";

contract Keno is GameBase {
    struct Info {
        string mapLayoutTxt; 
        string playNick; 
        uint256 betAmount;
        uint256 gameDatetime; 
        uint256 result; 
        string serverSeed; 
        string clientSeed; 
        string secretTxt; 
    }

    mapping(string => Info) public infos;

    event Betting(string indexed round);

    function betting(string calldata _round, Info calldata _info) external validCaller{

        infos[_round] = _info;
        emit Betting(_round);
    }

    // 查询方法
    function getBettingInfo(string calldata _round)
        external
        view
        returns (
            string memory mapLayoutTxt,
            string memory playNick,
            uint256 betAmount,
            uint256 gameDatetime,
            uint256 result,
            string memory serverSeed,
            string memory clientSeed,
            string memory secretTxt
        )
    {
        Info storage info = infos[_round];
        return (
            info.mapLayoutTxt,
            info.playNick,
            info.betAmount,
            info.gameDatetime,
            info.result,
            info.serverSeed,
            info.clientSeed,
            info.secretTxt
        );
    }

    function getResult(string calldata _round) external view returns (uint256) {
        Info storage info = infos[_round];
        return info.result;
    }

}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "@openzeppelin/contracts/access/Ownable.sol";

abstract contract GameBase is Ownable {
    mapping(address => bool) public callers;

    constructor() Ownable(msg.sender) {}
    
    modifier validCaller() {
        require(callers[msg.sender], "invalid caller");
        _;
    }

    function setCaller(address addr, bool enable) external onlyOwner {
        callers[addr] = enable;
    }
}

Settings
{
  "evmVersion": "cancun",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": [
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/[email protected]/"
  ]
}

Contract Security Audit

Contract ABI

API
[{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"string","name":"round","type":"string"}],"name":"Betting","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"string","name":"_round","type":"string"},{"components":[{"internalType":"string","name":"mapLayoutTxt","type":"string"},{"internalType":"string","name":"playNick","type":"string"},{"internalType":"uint256","name":"betAmount","type":"uint256"},{"internalType":"uint256","name":"gameDatetime","type":"uint256"},{"internalType":"uint256","name":"result","type":"uint256"},{"internalType":"string","name":"serverSeed","type":"string"},{"internalType":"string","name":"clientSeed","type":"string"},{"internalType":"string","name":"secretTxt","type":"string"}],"internalType":"struct Keno.Info","name":"_info","type":"tuple"}],"name":"betting","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"callers","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_round","type":"string"}],"name":"getBettingInfo","outputs":[{"internalType":"string","name":"mapLayoutTxt","type":"string"},{"internalType":"string","name":"playNick","type":"string"},{"internalType":"uint256","name":"betAmount","type":"uint256"},{"internalType":"uint256","name":"gameDatetime","type":"uint256"},{"internalType":"uint256","name":"result","type":"uint256"},{"internalType":"string","name":"serverSeed","type":"string"},{"internalType":"string","name":"clientSeed","type":"string"},{"internalType":"string","name":"secretTxt","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_round","type":"string"}],"name":"getResult","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"","type":"string"}],"name":"infos","outputs":[{"internalType":"string","name":"mapLayoutTxt","type":"string"},{"internalType":"string","name":"playNick","type":"string"},{"internalType":"uint256","name":"betAmount","type":"uint256"},{"internalType":"uint256","name":"gameDatetime","type":"uint256"},{"internalType":"uint256","name":"result","type":"uint256"},{"internalType":"string","name":"serverSeed","type":"string"},{"internalType":"string","name":"clientSeed","type":"string"},{"internalType":"string","name":"secretTxt","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"},{"internalType":"bool","name":"enable","type":"bool"}],"name":"setCaller","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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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.