query.js

'use strict';

var Fabric_Client = require('fabric-client');
var path = require('path');
var creds = require('./creds.json');

var fabric_client = new Fabric_Client();


var channel = fabric_client.newChannel('channel13');
var peer = fabric_client.newPeer(creds.peers['org1-peer1'].url, { pem: creds.peers['org1-peer1'].tlsCACerts.pem, 'ssl-target-name-override': null });
channel.addPeer(peer);

var member_user = null;
var store_path = path.join(__dirname, 'hfc-key-store');
console.log('Store path:' + store_path);

Fabric_Client.newDefaultKeyValueStore({
  path: store_path
}).then((state_store) => {
  fabric_client.setStateStore(state_store);
  var crypto_suite = Fabric_Client.newCryptoSuite();
  var crypto_store = Fabric_Client.newCryptoKeyStore({ path: store_path });
  crypto_suite.setCryptoKeyStore(crypto_store);
  fabric_client.setCryptoSuite(crypto_suite);

  return fabric_client.getUserContext('admin', true);
}).then((user_from_store) => {
  if (user_from_store && user_from_store.isEnrolled()) {
    console.log('Successfully loaded admin from persistence');
    member_user = user_from_store;
  } else {
    throw new Error('Failed to get admin.... run registerUser.js');
  }

  const request = {
    chaincodeId: 'Techurate',
    fcn: 'QueryFlag',
    args: ['Poopak']
  };

  return channel.queryByChaincode(request);
}).then((query_responses) => {
  console.log('Query has completed, checking results');
  if (query_responses && query_responses.length == 1) {
    if (query_responses[0] instanceof Error) {
      console.error('error from query = ', query_responses[0]);
    } else {
      console.log('Response is ', query_responses[0].toString());
    }
  } else {
    console.log('No payloads were returned from query');
  }
}).catch((err) => {
  console.error('Failed to query successfully :: ' + err);
});