Based-Consumer-CoinGecko.sol

based-consumer.sol

pragma solidity ^0.6.0;

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

contract ConsumerBasedMoney is ChainlinkClient {
  
    uint256 public price;
    
    address private oracle;
    bytes32 private jobId;
    uint256 private fee;
    
    /**
     * Oracle: FourSwords Kovan Testnet Node
     * Oracle Address - 0xa42fdfd2e1a7239b76d753803cbb7611004fe068
     * Job ID - 235c4499b644416da1cdd8f77d810f33
     * Fee: 0.1 LINK
     */
         
    /**
     * Oracle: Divination Mainnet Node
     * Oracle Address - 0x20b975a6eaa4aed8f76c6ba4250c8b40be5c9881
     * Job ID - 12a057dd60bf4e5fb38a35cf40d15c98
     * Fee: 0.1 LINK
     */
    constructor() public {
        setPublicChainlinkToken();
        oracle = 0xA42FdFD2E1a7239B76D753803cbB7611004FE068;
        jobId = "235c4499b644416da1cdd8f77d810f33";
        fee = 0.1 * 10 ** 18; // 0.1 LINK
    }
    

    function requestBasedPrice() public returns (bytes32 requestId) 
    {
        Chainlink.Request memory request = buildChainlinkRequest(jobId, address(this), this.fulfill.selector);
        
        // Set the URL to perform the GET request on
        request.add("get", "https://api.coingecko.com/api/v3/simple/price?ids=based-money&vs_currencies=usd");
        

        request.add("path", "BASED-MONEY.USD");
        
        // Multiply the result by 1000000000000000000 to remove decimals
        int timesAmount = 10**18;
        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");
    }
}