Chainlink Fullfill_alarm() 在使用 mocha 进行测试时成功请求发送到 oracle 后不回调

如何解决Chainlink Fullfill_alarm() 在使用 mocha 进行测试时成功请求发送到 oracle 后不回调

我正在尝试按照文档步骤在 kovan fork 网络上使用安全帽测试 Chainlink 警报预言机。

https://docs.chain.link/docs/chainlink-alarm-clock/#:~:text=ala

当我使用 npx hardhat test 测试合约时，它看起来像是向 oracle 发出请求函数，但从未回调fulfill_alarm()。

我想知道这可能是 fork 网络的问题还是我的测试代码的问题。

我使用 Alchemy api 作为 kovan 上 fork 网络的 url。

此外，我在 mocha 中使用超时，以便它可以等待回调执行，但永远不会命中。

第一个 it 语句正确执行，但是在第二个语句上，一旦彩票完成（调用 fulfill_alarm()），它应该增加 lotteryId + 1。看起来这个函数永远不会被 chainlink oracle 执行。

甲骨文：0xAA1DC356dc4B18f30C347798FD5379F3D77ABC5b

jobId：'982105d690504c5d9ce374d040c08654'

solidity 代码：

    //Starting Oracle Alarm
  function start_new_lottery(uint256 duration) public {
      require(lottery_state == LottERY_STATE.CLOSED,"can't start a n
      lottery_state = LottERY_STATE.OPEN;
      Chainlink.Request memory req = buildChainlinkRequest(jobId,add
      req.addUint("until",block.timestamp + duration);
      sendChainlinkRequestTo(oracle,req,oraclePayment);
       console.log('LINK REQ SEND');
   }

     //Callback Function after Oracle Alarm is Fulfilled
   function fulfill_alarm(bytes32 _requestId) public recordChainlinkFu
       require(lottery_state == LottERY_STATE.OPEN,"The lottery hasn'
       lotteryId = lotteryId + 1;
       console.log('ALARM_FULFILLED');
       pickWinner();
  }

测试代码：

const {expect} = require("chai");

const { time } = require("@openzeppelin/test-helpers");

describe("彩票合约",function() {

   //Defining global variables for testing.
   const price_lottery = ethers.BigNumber.from(1);
   let owner;
   let Lottery;
   let lottery;

  before(async function () {
      Lottery = await ethers.getContractFactory("Lottery");
      [owner] = await ethers.getSigners();
      lottery = await Lottery.deploy(
          price_lottery,);

      //Starting new Lottery
      await lottery.start_new_lottery(60);

  });

   it("should start a chainlink alarm to init new lottery",async func

       let lottery_state = await lottery.lottery_state();

       expect(lottery_state).to.equal(0);

       //Initial value
       let lotteryId = await lottery.lotteryId();
      expect(lotteryId).to.equal(1);
  })

  it("increments lotteryID + 1,when chainlink alarm is fulfilled aft

      //Wait until alarm is fulfilled
      function timeout(ms) {
           return new Promise(resolve => setTimeout(resolve,ms));
       }

       await timeout(120000);

       //Expected value
       let lotteryId = await lottery.lotteryId();
       expect(lotteryId).to.equal(2);
   })

})