SuperRandom.sol

// Sources flattened with hardhat v2.12.4 https://hardhat.org
//SPDX-License-Identifier: UNLICENSED

// File @axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGateway.sol@v3.2.0

import "@openzeppelin/contracts/utils/Strings.sol";

pragma solidity ^0.8.0;

interface IAxelarGateway {
    /**********\
    |* Errors *|
    \**********/

    error NotSelf();
    error NotProxy();
    error InvalidCodeHash();
    error SetupFailed();
    error InvalidAuthModule();
    error InvalidTokenDeployer();
    error InvalidAmount();
    error InvalidChainId();
    error InvalidCommands();
    error TokenDoesNotExist(string symbol);
    error TokenAlreadyExists(string symbol);
    error TokenDeployFailed(string symbol);
    error TokenContractDoesNotExist(address token);
    error BurnFailed(string symbol);
    error MintFailed(string symbol);
    error InvalidSetMintLimitsParams();
    error ExceedMintLimit(string symbol);

    /**********\
    |* Events *|
    \**********/

    event TokenSent(
        address indexed sender,
        string destinationChain,
        string destinationAddress,
        string symbol,
        uint256 amount
    );

    event ContractCall(
        address indexed sender,
        string destinationChain,
        string destinationContractAddress,
        bytes32 indexed payloadHash,
        bytes payload
    );

    event ContractCallWithToken(
        address indexed sender,
        string destinationChain,
        string destinationContractAddress,
        bytes32 indexed payloadHash,
        bytes payload,
        string symbol,
        uint256 amount
    );

    event Executed(bytes32 indexed commandId);

    event TokenDeployed(string symbol, address tokenAddresses);

    event ContractCallApproved(
        bytes32 indexed commandId,
        string sourceChain,
        string sourceAddress,
        address indexed contractAddress,
        bytes32 indexed payloadHash,
        bytes32 sourceTxHash,
        uint256 sourceEventIndex
    );

    event ContractCallApprovedWithMint(
        bytes32 indexed commandId,
        string sourceChain,
        string sourceAddress,
        address indexed contractAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        bytes32 sourceTxHash,
        uint256 sourceEventIndex
    );

    event TokenMintLimitUpdated(string symbol, uint256 limit);

    event OperatorshipTransferred(bytes newOperatorsData);

    event Upgraded(address indexed implementation);

    /********************\
    |* Public Functions *|
    \********************/

    function sendToken(
        string calldata destinationChain,
        string calldata destinationAddress,
        string calldata symbol,
        uint256 amount
    ) external;

    function callContract(
        string calldata destinationChain,
        string calldata contractAddress,
        bytes calldata payload
    ) external;

    function callContractWithToken(
        string calldata destinationChain,
        string calldata contractAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount
    ) external;

    function isContractCallApproved(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        address contractAddress,
        bytes32 payloadHash
    ) external view returns (bool);

    function isContractCallAndMintApproved(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        address contractAddress,
        bytes32 payloadHash,
        string calldata symbol,
        uint256 amount
    ) external view returns (bool);

    function validateContractCall(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes32 payloadHash
    ) external returns (bool);

    function validateContractCallAndMint(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes32 payloadHash,
        string calldata symbol,
        uint256 amount
    ) external returns (bool);

    /***********\
    |* Getters *|
    \***********/

    function authModule() external view returns (address);

    function tokenDeployer() external view returns (address);

    function tokenMintLimit(string memory symbol) external view returns (uint256);

    function tokenMintAmount(string memory symbol) external view returns (uint256);

    function allTokensFrozen() external view returns (bool);

    function implementation() external view returns (address);

    function tokenAddresses(string memory symbol) external view returns (address);

    function tokenFrozen(string memory symbol) external view returns (bool);

    function isCommandExecuted(bytes32 commandId) external view returns (bool);

    function adminEpoch() external view returns (uint256);

    function adminThreshold(uint256 epoch) external view returns (uint256);

    function admins(uint256 epoch) external view returns (address[] memory);

    /*******************\
    |* Admin Functions *|
    \*******************/

    function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external;

    function upgrade(
        address newImplementation,
        bytes32 newImplementationCodeHash,
        bytes calldata setupParams
    ) external;

    /**********************\
    |* External Functions *|
    \**********************/

    function setup(bytes calldata params) external;

    function execute(bytes calldata input) external;
}


// File @axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarExecutable.sol@v3.2.0



pragma solidity ^0.8.0;

interface IAxelarExecutable {
    error InvalidAddress();
    error NotApprovedByGateway();

    function gateway() external view returns (IAxelarGateway);

    function execute(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) external;

    function executeWithToken(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) external;
}


// File @axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol@v3.2.0



pragma solidity ^0.8.0;


contract AxelarExecutable is IAxelarExecutable {
    IAxelarGateway public immutable gateway;

    constructor(address gateway_) {
        if (gateway_ == address(0)) revert InvalidAddress();

        gateway = IAxelarGateway(gateway_);
    }

    function execute(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) external {
        bytes32 payloadHash = keccak256(payload);

        if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash))
            revert NotApprovedByGateway();

        _execute(sourceChain, sourceAddress, payload);
    }

    function executeWithToken(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) external {
        bytes32 payloadHash = keccak256(payload);

        if (
            !gateway.validateContractCallAndMint(
                commandId,
                sourceChain,
                sourceAddress,
                payloadHash,
                tokenSymbol,
                amount
            )
        ) revert NotApprovedByGateway();

        _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount);
    }

    function _execute(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) internal virtual {}

    function _executeWithToken(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) internal virtual {}
}


// File @axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol@v3.2.0



pragma solidity ^0.8.0;

// This should be owned by the microservice that is paying for gas.
interface IAxelarGasService {
    error NothingReceived();
    error InvalidAddress();
    error NotCollector();
    error InvalidAmounts();

    event GasPaidForContractCall(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event GasPaidForContractCallWithToken(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasPaidForContractCall(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasPaidForContractCallWithToken(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event GasPaidForExpressCallWithToken(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasPaidForExpressCallWithToken(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event GasAdded(
        bytes32 indexed txHash,
        uint256 indexed logIndex,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress);

    event ExpressGasAdded(
        bytes32 indexed txHash,
        uint256 indexed logIndex,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeExpressGasAdded(
        bytes32 indexed txHash,
        uint256 indexed logIndex,
        uint256 gasFeeAmount,
        address refundAddress
    );

    // This is called on the source chain before calling the gateway to execute a remote contract.
    function payGasForContractCall(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    // This is called on the source chain before calling the gateway to execute a remote contract.
    function payGasForContractCallWithToken(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    // This is called on the source chain before calling the gateway to execute a remote contract.
    function payNativeGasForContractCall(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        address refundAddress
    ) external payable;

    // This is called on the source chain before calling the gateway to execute a remote contract.
    function payNativeGasForContractCallWithToken(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address refundAddress
    ) external payable;

    // This is called on the source chain before calling the gateway to execute a remote contract.
    function payGasForExpressCallWithToken(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    // This is called on the source chain before calling the gateway to execute a remote contract.
    function payNativeGasForExpressCallWithToken(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address refundAddress
    ) external payable;

    function addGas(
        bytes32 txHash,
        uint256 txIndex,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    function addNativeGas(
        bytes32 txHash,
        uint256 logIndex,
        address refundAddress
    ) external payable;

    function addExpressGas(
        bytes32 txHash,
        uint256 txIndex,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    function addNativeExpressGas(
        bytes32 txHash,
        uint256 logIndex,
        address refundAddress
    ) external payable;

    function collectFees(
        address payable receiver,
        address[] calldata tokens,
        uint256[] calldata amounts
    ) external;

    function refund(
        address payable receiver,
        address token,
        uint256 amount
    ) external;

    function gasCollector() external returns (address);
}


// File @axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IERC20.sol@v3.2.0



pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    error InvalidAccount();

    /**
     * @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 examples/evm/call-contract/ExecutableSample.sol



pragma solidity ^0.8.0;




contract SuperRandom is AxelarExecutable {
    string public value;
    string public sourceChain;
    string public sourceAddress;
    uint256 totalNumberOfParticipants=2;
    uint256 randomVarInt;
    //uint256 randomNumber = 4;
    uint256 winnerIndex;
    address  winner;
    address[] participants;
    IAxelarGasService public immutable gasService;

    constructor(address gateway_, address gasReceiver_) AxelarExecutable(gateway_) {
        gasService = IAxelarGasService(gasReceiver_);
    }

    // Call this function to update the value of this contract along with all its siblings'.
    function setRemoteValue(
        string calldata destinationChain,
        string calldata destinationAddress,
        string calldata value_
    ) external payable {
        bytes memory payload = abi.encode(value_);
        if (msg.value > 0) {
            gasService.payNativeGasForContractCall{ value: msg.value }(
                address(this),
                destinationChain,
                destinationAddress,
                payload,
                msg.sender
            );
        }
        gateway.callContract(destinationChain, destinationAddress, payload);
    }

    
    // Handles calls created by setAndSend. Updates this contract's value
    function _execute(
        string calldata sourceChain_,
        string calldata sourceAddress_,
        bytes calldata payload_
    ) internal override {
        randomVarInt = abi.decode(payload_,(uint256));
        (value) = Strings.toString(randomVarInt);
        sourceChain = sourceChain_;
        sourceAddress = sourceAddress_;
    }


    function bet() external payable returns(bool status){
        //20000000 gwei
        require((participants.length<=totalNumberOfParticipants) && (msg.value == .02 ether));
            participants.push(msg.sender);
            return true;
        } 



    function pickWinner()  external  returns(address){
        require(participants.length == totalNumberOfParticipants);
        winnerIndex = randomVarInt%2;
        winner = participants[winnerIndex];
        payable(winner).transfer(address(this).balance);
        reset();
        return winner;

    }


    function reset() internal {
        delete participants;
    }
}