AddContractListener如何在HyperLeDger Fabric 1.4版本中起作用

Question

我正在使用Fabric版本1.4。我已经在第一个网络上部署了合同fabcar。我已经对现有合同进行了一些修改，例如添加setEvent（“启动”，[] byte {“ test”}）。我想要的是使用以下代码来聆听这些事件，但无法提取事件。这是我的代码： -

代码

//connect to Fabric Network, but starting a new gateway
   const gateway = new Gateway();

   //use our config file, our peerIdentity, and our discovery options to connect to Fabric network.
   await gateway.connect(ccpPath, { wallet, identity: peerIdentity, discovery: { enabled: true, asLocalhost: true } });

   console.log('gateway connect');

   //connect to our channel that has been created on IBM Blockchain Platform
   const network = await gateway.getNetwork('mychannel');

   //connect to our insurance contract that has been installed / instantiated on IBM Blockchain Platform
   const contract = await network.getContract('fabcar');

await contract.addContractListener('my-contract-listener', 'InitLedger', (err, event, blockNumber, transactionId, status) => {
      if (err) {
        console.error(err);
        return;
      }

      //convert event to something we can parse 
      event = event.payload.toString();
      event = JSON.parse(event)

      //where we output the TradeEvent
      console.log('************************ Start Trade Event *******************************************************');
      console.log(`make: ${event.type}`);
      console.log(`model: ${event.ownerId}`);
      console.log(`colour: ${event.id}`);
      console.log(`owner: ${event.description}`);
      console.log(`Block Number: ${blockNumber} Transaction ID: ${transactionId} Status: ${status}`);
      console.log('************************ End Trade Event ************************************');
    });

在我在控制台中运行此代码时，它不会打印。如果我缺少任何建议或任何建议，请欢迎或建议我。