chainLink_API

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

import "@chainlink/contracts/src/v0.8/ChainlinkClient.sol";
import "@chainlink/contracts/src/v0.8/ConfirmedOwner.sol";

/**
 * Request testnet LINK and ETH here: https://faucets.chain.link/
 * Find information on LINK Token Contracts and get the latest ETH and LINK faucets here: https://docs.chain.link/docs/link-token-contracts/
 */

/**
 * THIS IS AN EXAMPLE CONTRACT WHICH USES HARDCODED VALUES FOR CLARITY.
 * THIS EXAMPLE USES UN-AUDITED CODE.
 * DO NOT USE THIS CODE IN PRODUCTION.
 */

contract APIConsumer is ChainlinkClient, ConfirmedOwner {
    using Chainlink for Chainlink.Request;

    uint256 public volume;
    bytes32 private jobId;
    uint256 private fee;

    event RequestVolume(bytes32 indexed requestId, uint256 volume);

    /**
     * @notice Initialize the link token and target oracle
     *
     * Rinkeby Testnet details:
     * Link Token: 0x01BE23585060835E02B77ef475b0Cc51aA1e0709
     * Oracle: 0xf3FBB7f3391F62C8fe53f89B41dFC8159EE9653f (Chainlink DevRel)
     * jobId: ca98366cc7314957b8c012c72f05aeeb
     *
     */
    constructor() ConfirmedOwner(msg.sender) {
        setChainlinkToken(0x01BE23585060835E02B77ef475b0Cc51aA1e0709);
        setChainlinkOracle(0xf3FBB7f3391F62C8fe53f89B41dFC8159EE9653f);
        jobId = 'ca98366cc7314957b8c012c72f05aeeb';
        fee = (1 * LINK_DIVISIBILITY) / 10; // 0,1 * 10**18 (Varies by network and job)
    }

    /**
     * Create a Chainlink request to retrieve API response, find the target
     * data, then multiply by 1000000000000000000 (to remove decimal places from data).
     */
    function requestVolumeData() public returns (bytes32 requestId) {
        Chainlink.Request memory req = buildChainlinkRequest(jobId, address(this), this.fulfill.selector);
        string memory baseURI = "https://gateway.pinata.cloud/ipfs/QmVnb5cfKrt3pSUFmeBw96vQzK71Mx1v7tbGoK34yYDMYN/1";
        string memory extension = ".json";
        string memory uri = string(abi.encodePacked(baseURI,extension));

        // Set the URL to perform the GET request on
        req.add('get', uri);


        req.add('path', 'rarity'); // Chainlink nodes 1.0.0 and later support this format

        // Multiply the result by 1000000000000000000 to remove decimals
        int256 timesAmount = 10**18;
        req.addInt('times', timesAmount);

        // Sends the request
        return sendChainlinkRequest(req, fee);
    }

    /**
     * Receive the response in the form of uint256
     */
    function fulfill(bytes32 _requestId, uint256 _volume) public recordChainlinkFulfillment(_requestId) {
        emit RequestVolume(_requestId, _volume);
        volume = _volume/10**18;
    }

    /**
     * Allow withdraw of Link tokens from the contract
     */
    function withdrawLink() public onlyOwner {
        LinkTokenInterface link = LinkTokenInterface(chainlinkTokenAddress());
        require(link.transfer(msg.sender, link.balanceOf(address(this))), 'Unable to transfer');
    }
}