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


// OpenZeppelin Contracts (last updated v5.0.0) (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;
    }
}

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


// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;


/**
 * @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);
    }
}

// File: referral1.sol


pragma solidity ^0.8.0;
pragma abicoder v2;


struct UserInfo {
    uint256 amount;         // How many LP tokens the user has provided.
    uint256 rewardDebt;     
    uint256 USDCrewardDebt; // Reward debt.
    uint256 lastDepositTime;
}

interface staking {
    function userInfo(uint256 _pid, address _user) external view returns(UserInfo memory);
}

contract referral is Ownable(msg.sender) {
    staking public stake = staking(0x1FDe0d2F44539789256D94D1784a86bF77D66DD0);

    mapping(address => address) public userReferrer;        // User => Referrer
    mapping(address => address[]) public userReferees;      // User => List of Referees
    uint256 public weight = 5;
    uint256 public maxref = 40;

    function setWeight(uint256 newweight) public onlyOwner {
        weight = newweight;
    }

    function getStakingAmount(address _user) public view returns(uint256) {
        uint256 amount1 = stake.userInfo(0, _user).amount;
        return (amount1);
    }

    function updateStake(staking _stake) external onlyOwner {
        stake = _stake;
    }

    function updateMaxRef(uint256 _maxref) external onlyOwner {
        maxref = _maxref;
    }

    function setReferrer(address _referrer) external {
        require(userReferrer[msg.sender] == address(0), "Referrer already set");
        require(_referrer != msg.sender, "Cannot refer self");
        require(userReferees[_referrer].length < maxref, "Referrer has reached maximum referees");
        require(getStakingAmount(_referrer) > 0, "referrer not staked");

        userReferrer[msg.sender] = _referrer;
        userReferees[_referrer].push(msg.sender);
   
    }

    function calculatePoints(address _user) external view returns(uint256) {

        uint256 totalAmount = getStakingAmount(_user)*weight;
        
        if (userReferrer[_user] != address(0)) {
            totalAmount = totalAmount*2;
        }

        // Add amounts for all referees
        for (uint i = 0; i < userReferees[_user].length; i++) {
            totalAmount += getStakingAmount(userReferees[_user][i]);
        }



        return totalAmount;
    }

    function getReferees(address user) external view returns (address[] memory) {
        return userReferees[user];
    }

    function getRefereesStakedBalances(address user) external view returns (uint256[] memory) {
        address[] memory referees = userReferees[user];
        uint256[] memory stakedBalances = new uint256[](referees.length);

        for (uint256 i = 0; i < referees.length; i++) {
            stakedBalances[i] = getStakingAmount(referees[i]);
        }

        return stakedBalances;
    }



    // Additional functions and modifications can be added here.
}

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