我们能否使用node SDK在hypeledger中仅连接网关一次

npm install fabric-network

const { Gateway, Wallets } = require('fabric-network');
const path = require('path');

async function connectToGateway() {
  try {
    // Load connection profile
    const ccpPath = path.resolve(__dirname, 'connection.json');
    const ccp = JSON.parse(fs.readFileSync(ccpPath, 'utf8'));

    // Create a new file system based wallet for managing identities
    const walletPath = path.join(process.cwd(), 'wallet');
    const wallet = await Wallets.newFileSystemWallet(walletPath);

    // Check if the identity exists in the wallet
    const identity = await wallet.get('user1');
    if (!identity) {
      console.log('Identity not found in the wallet');
      return;
    }

    // Create a new gateway for connecting to the network
    const gateway = new Gateway();
    await gateway.connect(ccp, {
      wallet,
      identity: 'user1',
      discovery: { enabled: true, asLocalhost: true },
    });

    // Access the network
    const network = await gateway.getNetwork('mychannel');
    const contract = network.getContract('mychaincode');

    // Perform operations on the network
    // ...

    // Disconnect from the gateway
    gateway.disconnect();
  } catch (error) {
    console.error(`Failed to connect to the gateway: ${error}`);
  }
}

connectToGateway();