如何深入了解鏈鏈接 req.add(“path”) 請求的 JSON 主體？ 添加 2+ 路徑

Question

我可以使用req.add("path", "chainlink") chainlink鏈環路徑的結果

但是，我想返回"chainlink", "USD"的價格值。 output json有兩條路徑，如何到達第二條路徑獲取價格值？

  function requestLINKPrice() 
    public
    onlyOwner
  {
    Chainlink.Request memory req = buildChainlinkRequest(JOB, address(this), this.fulfill.selector);
    req.add("get", "https://api.coingecko.com/api/v3/simple/price?ids=chainlink&vs_currencies=usd");
    req.add("path", "chainlinkUSD");
    req.addInt("times", 100);
    sendChainlinkRequestTo(ORACLE, req, ORACLE_PAYMENT);
  }

這是 API 的 JSON 響應

{
  chainlink: {
    usd: 3.78
  }
}

Answer 1

您可以使用帶有copyPath語法的復制適配器。

string[] memory copyPath = new string[](2);
copyPath[0] = "chainlink";
copyPath[1] = "USD";
req.addStringArray("copyPath", copyPath);

這是整個 function。

  function requestLINKPrice() 
    public
    onlyOwner
  {
    Chainlink.Request memory req = buildChainlinkRequest(JOB, address(this), this.fulfill.selector);
    req.add("get", "https://api.coingecko.com/api/v3/simple/price?ids=chainlink&vs_currencies=usd");
    string[] memory copyPath = new string[](2);
    copyPath[0] = "chainlink";
    copyPath[1] = "USD";
    req.addStringArray("copyPath", copyPath);
    req.addInt("times", 100);
    sendChainlinkRequestTo(ORACLE, req, ORACLE_PAYMENT);
  }