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APIConsumer.sol

// SPDX-License-Identifier: MIT

/** This example code is designed to quickly deploy an example contract using Remix.
 *  If you have never used Remix, try our example walkthrough: https://docs.chain.link/docs/example-walkthrough
 *  You will need testnet ETH and LINK.
 *     - Kovan ETH faucet: https://faucet.kovan.network/
 *     - Kovan LINK faucet: https://kovan.chain.link/
 */

pragma solidity ^0.6.0;

import "https://raw.githubusercontent.com/smartcontractkit/chainlink/develop/evm-contracts/src/v0.6/ChainlinkClient.sol";

contract APIConsumer is ChainlinkClient {
  
    uint256 public price; // USD * 10**6
    
    address private oracle;
    bytes32 private jobId;
    uint256 private fee;
    
    string public symbol = "GME";
    
    /**
     * Network: Rinkeby
     * Fee: 0.1 LINK
     */
    constructor() public {
        setPublicChainlinkToken();
        oracle = 0x7AFe1118Ea78C1eae84ca8feE5C65Bc76CcF879e;
        jobId = "6d1bfe27e7034b1d87b5270556b17277";
        fee = 0.1 * 10 ** 18; // 0.1 LINK
    }
    
    /**
     * Create a Chainlink request to retrieve API response, find the target
     * data, then multiply by 1000000 (to remove decimal places from data).
     */
    function requestPriceData() public returns (bytes32 requestId) 
    {
        
        Chainlink.Request memory request = buildChainlinkRequest(jobId, address(this), this.fulfill.selector);

        request.add("get", "https://nasdaq-proxy.vercel.app/api/get-price");
        request.add("queryParams", string(abi.encodePacked("symbol=", symbol)));
        
        request.add("path", "price");
        
        // Multiply the result by 1000000 to remove decimals
        int timesAmount = 10**6;
        request.addInt("times", timesAmount);
        
        // Sends the request
        return sendChainlinkRequestTo(oracle, request, fee);
    }
    
    /**
     * Receive the response in the form of uint256
     */ 
    function fulfill(bytes32 _requestId, uint256 _price) public recordChainlinkFulfillment(_requestId)
    {
        price = _price;
    }
    
    /**
     * Withdraw LINK from this contract
     * 
     * NOTE: DO NOT USE THIS IN PRODUCTION AS IT CAN BE CALLED BY ANY ADDRESS.
     * THIS IS PURELY FOR EXAMPLE PURPOSES ONLY.
     */
    function withdrawLink() external {
        LinkTokenInterface linkToken = LinkTokenInterface(chainlinkTokenAddress());
        require(linkToken.transfer(msg.sender, linkToken.balanceOf(address(this))), "Unable to transfer");
    }
}