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0x80742830E90381575Ae7D60CaE5CC0882Fb19e31
 

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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0xe0126A13...60B648B77
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
NFTDropRaffle

Compiler Version
v0.8.20+commit.a1b79de6

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.19;

import {GelatoVRFConsumerBase} from "./vendor/GelatoVRFConsumerBase.sol";

contract NFTDropRaffle is GelatoVRFConsumerBase {
    // admin and operator addresses
    address private immutable _operatorAddr;
    address private immutable _adminAddress;

    uint256 public dropNumber;

    // winner of NFT drops
    address public winner;

    // each drop all entries are added here
    address[] public userAddresses;

    event WinnerSelected(address indexed winner, uint256 indexed dropId);

    // this is the operator function that Gelato uses to get the operator address
    function _operator() internal view override returns (address) {
        return _operatorAddr;
    }

    constructor(address adminAddress, address gelatoMessageSender) {
        _adminAddress = adminAddress;
        _operatorAddr = gelatoMessageSender;
    }

    function pushToUserAddresses(address[] calldata _userAddresses) public {
        require(
            msg.sender == _adminAddress,
            "Only Admin can call this function."
        );

        // add an entry for each NFT weight
        for (uint256 i = 0; i < _userAddresses.length; ++i) {
            userAddresses.push(_userAddresses[i]);
        }
    }

    function selectWinner() public {
        require(msg.sender == _adminAddress, "Only Admin can select winner.");
        // run the lottery
        _requestRandomness(abi.encode(msg.sender));
    }

    // Gelato calls this with their random number
    function _fulfillRandomness(
        uint256 randomness,
        uint256,
        bytes memory
    ) internal override {
        // select winner based on randomness from Gelato VRF
        uint256 winnerIndex = randomness % userAddresses.length;
        // get the winner address from all our entry tickets
        winner = userAddresses[winnerIndex];
        // emit the winner for record keeping
        emit WinnerSelected(winner, dropNumber);
    }
}

// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.18;

import {IGelatoVRFConsumer} from "./IGelatoVRFConsumer.sol";

/// @title GelatoVRFConsumerBase
/// @dev This contract handles domain separation between consecutive randomness requests
/// The contract has to be implemented by contracts willing to use the gelato VRF system.
/// This base contract enhances the GelatoVRFConsumer by introducing request IDs and
/// ensuring unique random values.
/// for different request IDs by hashing them with the random number provided by drand.
/// For security considerations, refer to the Gelato documentation.
abstract contract GelatoVRFConsumerBase is IGelatoVRFConsumer {
    uint256 private constant _PERIOD = 3;
    uint256 private constant _GENESIS = 1692803367;
    bool[] public requestPending;
    mapping(uint256 => bytes32) public requestedHash;

    /// @notice Returns the address of the dedicated msg.sender.
    /// @dev The operator can be found on the Gelato dashboard after a VRF is deployed.
    /// @return Address of the operator.
    function _operator() internal view virtual returns (address);

    /// @notice User logic to handle the random value received.
    /// @param randomness The random number generated by Gelato VRF.
    /// @param requestId The ID for the randomness request.
    /// @param extraData Additional data from the randomness request.
    function _fulfillRandomness(
        uint256 randomness,
        uint256 requestId,
        bytes memory extraData
    ) internal virtual;

    /// @notice Requests randomness from the Gelato VRF.
    /// @dev The extraData parameter allows for additional data to be passed to
    /// the VRF, which is then forwarded to the callback. This is useful for
    /// request tracking purposes if requestId is not enough.
    /// @param extraData Additional data for the randomness request.
    /// @return requestId The ID for the randomness request.
    function _requestRandomness(
        bytes memory extraData
    ) internal returns (uint256 requestId) {
        requestId = uint256(requestPending.length);
        requestPending.push();
        requestPending[requestId] = true;

        bytes memory data = abi.encode(requestId, extraData);
        uint256 round = _round();

        bytes memory dataWithRound = abi.encode(round, data);
        bytes32 requestHash = keccak256(dataWithRound);

        requestedHash[requestId] = requestHash;

        emit RequestedRandomness(round, data);
    }

    /// @notice Callback function used by Gelato VRF to return the random number.
    /// The randomness is derived by hashing the provided randomness with the request ID.
    /// @param randomness The random number generated by Gelato VRF.
    /// @param dataWithRound Additional data provided by Gelato VRF containing request details.
    function fulfillRandomness(
        uint256 randomness,
        bytes calldata dataWithRound
    ) external {
        require(msg.sender == _operator(), "only operator");

        (, bytes memory data) = abi.decode(dataWithRound, (uint256, bytes));
        (uint256 requestId, bytes memory extraData) = abi.decode(
            data,
            (uint256, bytes)
        );

        bytes32 requestHash = keccak256(dataWithRound);
        bool isValidRequestHash = requestHash == requestedHash[requestId];

        require(requestPending[requestId], "request fulfilled or missing");

        if (isValidRequestHash) {
            randomness = uint256(
                keccak256(
                    abi.encode(
                        randomness,
                        address(this),
                        block.chainid,
                        requestId
                    )
                )
            );

            _fulfillRandomness(randomness, requestId, extraData);
            requestPending[requestId] = false;
        }
    }

    /// @notice Computes and returns the round number of drand to request randomness from.
    function _round() private view returns (uint256 round) {
        // solhint-disable-next-line not-rely-on-time
        uint256 elapsedFromGenesis = block.timestamp - _GENESIS;
        uint256 currentRound = (elapsedFromGenesis / _PERIOD) + 1;

        round = block.chainid == 1 ? currentRound + 4 : currentRound + 1;
    }
}

// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.18;

/// @title IGelatoVRFConsumer
/// @dev Interface for consuming random number provided by Drand.
/// @notice This interface allows contracts to receive a random number provided by Gelato VRF.
interface IGelatoVRFConsumer {
    /// @notice Event emitted when a randomness request is made.
    /// @param data The round of randomness to request.
    /// @param data Additional data associated with the request.
    event RequestedRandomness(uint256 round, bytes data);

    /// @notice Callback function used by Gelato to return the random number.
    /// @dev The random number is fetched from one among many drand endpoints
    /// and passed back to this function like in a Gelato Web3 Function.
    /// @param randomness The random number generated by drand.
    /// @param data Additional data provided by Gelato VRF or the user, typically unused.
    function fulfillRandomness(
        uint256 randomness,
        bytes calldata data
    ) external;
}

Settings
{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

API
[{"inputs":[{"internalType":"address","name":"adminAddress","type":"address"},{"internalType":"address","name":"gelatoMessageSender","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"round","type":"uint256"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"RequestedRandomness","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"winner","type":"address"},{"indexed":true,"internalType":"uint256","name":"dropId","type":"uint256"}],"name":"WinnerSelected","type":"event"},{"inputs":[],"name":"dropNumber","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"randomness","type":"uint256"},{"internalType":"bytes","name":"dataWithRound","type":"bytes"}],"name":"fulfillRandomness","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_userAddresses","type":"address[]"}],"name":"pushToUserAddresses","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"requestPending","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"requestedHash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"selectWinner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"userAddresses","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"winner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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Deployed Bytecode

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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.