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https://github.com/hyperledger/fabric-samples.git
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445ccbc25a
Move the old programming model samples for FabCar, including the "node" (JavaScript!) chaincode sample and the JavaScript application in the top level into new subdirectories called "javascript-low-level". We still want to keep these samples around for comparision purposes, but most new developers should be using the new samples built using the new programming model. At the same time, update the startFabric.sh script to output correct help information on how to run the applications built using the new programming model after starting the Fabric network and deploying the chaincode. Change-Id: I1e3701737f105cba67f661bf893771ac8a3a0373 Signed-off-by: Simon Stone <sstone1@uk.ibm.com>
77 lines
2.5 KiB
JavaScript
77 lines
2.5 KiB
JavaScript
'use strict';
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/*
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* Copyright IBM Corp All Rights Reserved
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/*
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* Chaincode query
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*/
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var Fabric_Client = require('fabric-client');
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var path = require('path');
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var util = require('util');
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var os = require('os');
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//
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var fabric_client = new Fabric_Client();
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// setup the fabric network
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var channel = fabric_client.newChannel('mychannel');
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var peer = fabric_client.newPeer('grpc://localhost:7051');
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channel.addPeer(peer);
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//
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var member_user = null;
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var store_path = path.join(__dirname, 'hfc-key-store');
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console.log('Store path:'+store_path);
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var tx_id = null;
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// create the key value store as defined in the fabric-client/config/default.json 'key-value-store' setting
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Fabric_Client.newDefaultKeyValueStore({ path: store_path
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}).then((state_store) => {
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// assign the store to the fabric client
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fabric_client.setStateStore(state_store);
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var crypto_suite = Fabric_Client.newCryptoSuite();
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// use the same location for the state store (where the users' certificate are kept)
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// and the crypto store (where the users' keys are kept)
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var crypto_store = Fabric_Client.newCryptoKeyStore({path: store_path});
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crypto_suite.setCryptoKeyStore(crypto_store);
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fabric_client.setCryptoSuite(crypto_suite);
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// get the enrolled user from persistence, this user will sign all requests
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return fabric_client.getUserContext('user1', true);
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}).then((user_from_store) => {
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if (user_from_store && user_from_store.isEnrolled()) {
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console.log('Successfully loaded user1 from persistence');
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member_user = user_from_store;
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} else {
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throw new Error('Failed to get user1.... run registerUser.js');
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}
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// queryCar chaincode function - requires 1 argument, ex: args: ['CAR4'],
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// queryAllCars chaincode function - requires no arguments , ex: args: [''],
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const request = {
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//targets : --- letting this default to the peers assigned to the channel
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chaincodeId: 'fabcar',
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fcn: 'queryAllCars',
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args: ['']
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};
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// send the query proposal to the peer
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return channel.queryByChaincode(request);
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}).then((query_responses) => {
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console.log("Query has completed, checking results");
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// query_responses could have more than one results if there multiple peers were used as targets
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if (query_responses && query_responses.length == 1) {
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if (query_responses[0] instanceof Error) {
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console.error("error from query = ", query_responses[0]);
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} else {
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console.log("Response is ", query_responses[0].toString());
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}
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} else {
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console.log("No payloads were returned from query");
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}
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}).catch((err) => {
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console.error('Failed to query successfully :: ' + err);
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});
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