pragma solidity 0.6.6;

import "https://raw.githubusercontent.com/smartcontractkit/chainlink/7a4e19a8ff07db1be0b397465d38d175bc0bb5b5/evm-contracts/src/v0.6/VRFConsumerBase.sol";

contract RandomNumberConsumer is VRFConsumerBase {
    
    bytes32 internal keyHash;
    uint256 internal fee;
    
    uint256 public randomResult;
    
    /**
     * Constructor inherits VRFConsumerBase
     * 
     * Network: Ropsten
     * Chainlink VRF Coordinator address: 0xf720CF1B963e0e7bE9F58fd471EFa67e7bF00cfb
     * LINK token address:                0x20fE562d797A42Dcb3399062AE9546cd06f63280
     * Key Hash: 0xced103054e349b8dfb51352f0f8fa9b5d20dde3d06f9f43cb2b85bc64b238205
     */
    constructor() 
        VRFConsumerBase(
            0xf720CF1B963e0e7bE9F58fd471EFa67e7bF00cfb, // VRF Coordinator
            0x20fE562d797A42Dcb3399062AE9546cd06f63280  // LINK Token
        ) public
    {
        keyHash = 0xced103054e349b8dfb51352f0f8fa9b5d20dde3d06f9f43cb2b85bc64b238205;
        fee = 0.1 * 10 ** 18; // 0.1 LINK
    }
    
    /** 
     * Requests randomness from a user-provided seed
     */
    function getRandomNumber(uint256 userProvidedSeed) public returns (bytes32 requestId) {
        require(LINK.balanceOf(address(this)) > fee, "Not enough LINK - fill contract with faucet");
        return requestRandomness(keyHash, fee, userProvidedSeed);
    }

    /**
     * Callback function used by VRF Coordinator
     */
    function fulfillRandomness(bytes32 requestId, uint256 randomness) external override {
        require(msg.sender == vrfCoordinator, "Fulfilment only permitted by Coordinator");
        randomResult = randomness;
    }
}

pragma solidity 0.6.6;

import "https://raw.githubusercontent.com/smartcontractkit/chainlink/7a4e19a8ff07db1be0b397465d38d175bc0bb5b5/evm-contracts/src/v0.6/VRFConsumerBase.sol";

contract RandomNumberConsumer is VRFConsumerBase {
    
    bytes32 internal keyHash;
    uint256 internal fee;
    
    uint256 public randomResult;
    
    /**
     * Constructor inherits VRFConsumerBase
     * 
     * Network: Kovan
     * Chainlink VRF Coordinator address: 0xc1031337fe8E75Cf25CAe9828F3BF734d83732e4
     * LINK token address:                0xa36085F69e2889c224210F603D836748e7dC0088
     * Key Hash: 0x0218141742245eeeba0660e61ef8767e6ce8e7215289a4d18616828caf4dfe33
     */
    constructor() 
        VRFConsumerBase(
            0xc1031337fe8E75Cf25CAe9828F3BF734d83732e4, // VRF Coordinator
            0xa36085F69e2889c224210F603D836748e7dC0088  // LINK Token
        ) public
    {
        keyHash = 0x0218141742245eeeba0660e61ef8767e6ce8e7215289a4d18616828caf4dfe33;
        fee = 0.1 * 10 ** 18; // 0.1 LINK
    }
    
    /** 
     * Requests randomness from a user-provided seed
     */
    function getRandomNumber(uint256 userProvidedSeed) public returns (bytes32 requestId) {
        require(LINK.balanceOf(address(this)) > fee, "Not enough LINK - fill contract with faucet");
        return requestRandomness(keyHash, fee, userProvidedSeed);
    }

    /**
     * Callback function used by VRF Coordinator
     */
    function fulfillRandomness(bytes32 requestId, uint256 randomness) external override {
        require(msg.sender == vrfCoordinator, "Fulfilment only permitted by Coordinator");
        randomResult = randomness;
    }
}

pragma solidity 0.6.6;

import "https://raw.githubusercontent.com/smartcontractkit/chainlink/7a4e19a8ff07db1be0b397465d38d175bc0bb5b5/evm-contracts/src/v0.6/VRFConsumerBase.sol";

contract RandomNumberConsumer is VRFConsumerBase {
    
    bytes32 internal keyHash;
    uint256 internal fee;
    
    uint256 public randomResult;
    
    /**
     * Constructor inherits VRFConsumerBase
     * 
     * Network: Rinkeby
     * Chainlink VRF Coordinator address: 0xc1031337fe8E75Cf25CAe9828F3BF734d83732e4
     * LINK token address:                0x01BE23585060835E02B77ef475b0Cc51aA1e0709
     * Key Hash: 0xcad496b9d0416369213648a32b4975fff8707f05dfb43603961b58f3ac6617a7
     */
    constructor() 
        VRFConsumerBase(
            0xc1031337fe8E75Cf25CAe9828F3BF734d83732e4, // VRF Coordinator
            0x01BE23585060835E02B77ef475b0Cc51aA1e0709  // LINK Token
        ) public
    {
        keyHash = 0xcad496b9d0416369213648a32b4975fff8707f05dfb43603961b58f3ac6617a7;
        fee = 0.1 * 10 ** 18; // 0.1 LINK
    }
    
    /** 
     * Requests randomness from a user-provided seed
     */
    function getRandomNumber(uint256 userProvidedSeed) public returns (bytes32 requestId) {
        require(LINK.balanceOf(address(this)) > fee, "Not enough LINK - fill contract with faucet");
        return requestRandomness(keyHash, fee, userProvidedSeed);
    }

    /**
     * Callback function used by VRF Coordinator
     */
    function fulfillRandomness(bytes32 requestId, uint256 randomness) external override {
        require(msg.sender == vrfCoordinator, "Fulfilment only permitted by Coordinator");
        randomResult = randomness;
    }
}