[FAB-5303] Further balance-transfer code optimization

- Made it possible to deploy the app (both the client and fabric
  backend) to a location other than localhost
- Made it possible to work with a backend over grpc instead of always
  assuming grpcs
- Made the list of target peers for instantiate and invoke calls
  to be optional
- Enabled target networks to be controlled by an env variable

Change-Id: Ie394cf7e8f6ed47d970d4be992f2f6a0394fff7f
Signed-off-by: Jim Zhang <jzhang@us.ibm.com>

balance-transfer/README.md

@@ -117,7 +117,7 @@ curl -s -X POST \
   -H "authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE0OTQ4NjU1OTEsInVzZXJuYW1lIjoiSmltIiwib3JnTmFtZSI6Im9yZzEiLCJpYXQiOjE0OTQ4NjE5OTF9.yWaJhFDuTvMQRaZIqg20Is5t-JJ_1BP58yrNLOKxtNI" \
   -H "content-type: application/json" \
   -d '{
-	"peers": ["localhost:7051","localhost:7056"]
+	"peers": ["peer1","peer2"]
 }'
 ```
 ### Install chaincode
@@ -128,7 +128,7 @@ curl -s -X POST \
   -H "authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE0OTQ4NjU1OTEsInVzZXJuYW1lIjoiSmltIiwib3JnTmFtZSI6Im9yZzEiLCJpYXQiOjE0OTQ4NjE5OTF9.yWaJhFDuTvMQRaZIqg20Is5t-JJ_1BP58yrNLOKxtNI" \
   -H "content-type: application/json" \
   -d '{
-	"peers": ["localhost:7051","localhost:7056"],
+	"peers": ["peer1","peer2"],
 	"chaincodeName":"mycc",
 	"chaincodePath":"github.com/example_cc",
 	"chaincodeVersion":"v0"
@@ -143,10 +143,8 @@ curl -s -X POST \
   -H "authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE0OTQ4NjU1OTEsInVzZXJuYW1lIjoiSmltIiwib3JnTmFtZSI6Im9yZzEiLCJpYXQiOjE0OTQ4NjE5OTF9.yWaJhFDuTvMQRaZIqg20Is5t-JJ_1BP58yrNLOKxtNI" \
   -H "content-type: application/json" \
   -d '{
-	"peers": ["localhost:7051"],
 	"chaincodeName":"mycc",
 	"chaincodeVersion":"v0",
-	"fcn":"init",
 	"args":["a","100","b","200"]
 }'
 ```
@@ -159,7 +157,6 @@ curl -s -X POST \
   -H "authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE0OTQ4NjU1OTEsInVzZXJuYW1lIjoiSmltIiwib3JnTmFtZSI6Im9yZzEiLCJpYXQiOjE0OTQ4NjE5OTF9.yWaJhFDuTvMQRaZIqg20Is5t-JJ_1BP58yrNLOKxtNI" \
   -H "content-type: application/json" \
   -d '{
-	"peers": ["localhost:7051", "localhost:7056"],
 	"fcn":"move",
 	"args":["a","b","10"]
 }'
@@ -232,7 +229,7 @@ curl -s -X GET \
 
 ### Network configuration considerations
 
-You have the ability to change configuration parameters by editing the network-config.json file.
+You have the ability to change configuration parameters by either directly editing the network-config.json file or provide an additional file for an alternative target network. The app uses an optional environment variable "TARGET_NETWORK" to control the configuration files to use. For example, if you deployed the target network on Amazon Web Services EC2, you can add a file "network-config-aws.json", and set the "TARGET_NETWORK" environment to 'aws'. The app will pick up the settings inside the "network-config-aws.json" file.
 
 #### IP Address** and PORT information
 

balance-transfer/app.js

@@ -27,7 +27,10 @@ var expressJWT = require('express-jwt');
 var jwt = require('jsonwebtoken');
 var bearerToken = require('express-bearer-token');
 var cors = require('cors');
-var config = require('./config.json');
+
+require('./config.js');
+var hfc = require('fabric-client');
+
 var helper = require('./app/helper.js');
 var channels = require('./app/create-channel.js');
 var join = require('./app/join-channel.js');
@@ -35,8 +38,8 @@ var install = require('./app/install-chaincode.js');
 var instantiate = require('./app/instantiate-chaincode.js');
 var invoke = require('./app/invoke-transaction.js');
 var query = require('./app/query.js');
-var host = process.env.HOST || config.host;
+var host = process.env.HOST || hfc.getConfigSetting('host');
-var port = process.env.PORT || config.port;
+var port = process.env.PORT || hfc.getConfigSetting('port');
 ///////////////////////////////////////////////////////////////////////////////
 //////////////////////////////// SET CONFIGURATONS ////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
@@ -118,7 +121,7 @@ app.post('/users', function(req, res) {
 		return;
 	}
 	var token = jwt.sign({
-		exp: Math.floor(Date.now() / 1000) + parseInt(config.jwt_expiretime),
+		exp: Math.floor(Date.now() / 1000) + parseInt(hfc.getConfigSetting('jwt_expiretime')),
 		username: username,
 		orgName: orgName
 	}, app.get('secret'));
@@ -235,10 +238,6 @@ app.post('/channels/:channelName/chaincodes', function(req, res) {
 		res.json(getErrorMessage('\'channelName\''));
 		return;
 	}
-	if (!fcn) {
-		res.json(getErrorMessage('\'fcn\''));
-		return;
-	}
 	if (!args) {
 		res.json(getErrorMessage('\'args\''));
 		return;
@@ -260,10 +259,6 @@ app.post('/channels/:channelName/chaincodes/:chaincodeName', function(req, res)
 	logger.debug('chaincodeName : ' + chaincodeName);
 	logger.debug('fcn  : ' + fcn);
 	logger.debug('args  : ' + args);
-	if (!peers || peers.length == 0) {
-		res.json(getErrorMessage('\'peers\''));
-		return;
-	}
 	if (!chaincodeName) {
 		res.json(getErrorMessage('\'chaincodeName\''));
 		return;

balance-transfer/app/helper.js

@@ -24,10 +24,8 @@ var fs = require('fs-extra');
 var User = require('fabric-client/lib/User.js');
 var crypto = require('crypto');
 var copService = require('fabric-ca-client');
-var config = require('../config.json');
 
 var hfc = require('fabric-client');
-hfc.addConfigFile(path.join(__dirname, 'network-config.json'));
 hfc.setLogger(logger);
 var ORGS = hfc.getConfigSetting('network-config');
 
@@ -44,7 +42,7 @@ for (let key in ORGS) {
 		cryptoSuite.setCryptoKeyStore(hfc.newCryptoKeyStore({path: getKeyStoreForOrg(ORGS[key].name)}));
 		client.setCryptoSuite(cryptoSuite);
 
-		let channel = client.newChannel(config.channelName);
+		let channel = client.newChannel(hfc.getConfigSetting('channelName'));
 		channel.addOrderer(newOrderer(client));
 
 		clients[key] = client;
@@ -58,19 +56,18 @@ for (let key in ORGS) {
 }
 
 function setupPeers(channel, org, client) {
-	for (let key in ORGS[org]) {
+	for (let key in ORGS[org].peers) {
-		if (key.indexOf('peer') === 0) {
+		let data = fs.readFileSync(path.join(__dirname, ORGS[org].peers[key]['tls_cacerts']));
-			let data = fs.readFileSync(path.join(__dirname, ORGS[org][key]['tls_cacerts']));
+		let peer = client.newPeer(
-			let peer = client.newPeer(
+			ORGS[org].peers[key].requests,
-				ORGS[org][key].requests,
+			{
-				{
+				pem: Buffer.from(data).toString(),
-					pem: Buffer.from(data).toString(),
+				'ssl-target-name-override': ORGS[org].peers[key]['server-hostname']
-					'ssl-target-name-override': ORGS[org][key]['server-hostname']
+			}
-				}
+		);
-			);
+		peer.setName(key);
 
-			channel.addPeer(peer);
+		channel.addPeer(peer);
-		}
 	}
 }
 
@@ -78,7 +75,7 @@ function newOrderer(client) {
 	var caRootsPath = ORGS.orderer.tls_cacerts;
 	let data = fs.readFileSync(path.join(__dirname, caRootsPath));
 	let caroots = Buffer.from(data).toString();
-	return client.newOrderer(config.orderer, {
+	return client.newOrderer(ORGS.orderer.url, {
 		'pem': caroots,
 		'ssl-target-name-override': ORGS.orderer['server-hostname']
 	});
@@ -100,60 +97,36 @@ function getOrgName(org) {
 }
 
 function getKeyStoreForOrg(org) {
-	return config.keyValueStore + '_' + org;
+	return hfc.getConfigSetting('keyValueStore') + '_' + org;
 }
 
-function newRemotes(urls, forPeers, userOrg) {
+function newRemotes(names, forPeers, userOrg) {
-	var targets = [];
+	let client = getClientForOrg(userOrg);
-	// find the peer that match the urls
-	outer:
-	for (let index in urls) {
-		let peerUrl = urls[index];
 
-		let found = false;
+	let targets = [];
-		for (let key in ORGS) {
+	// find the peer that match the names
-			if (key.indexOf('org') === 0) {
+	for (let idx in names) {
-				// if looking for event hubs, an app can only connect to
+		let peerName = names[idx];
-				// event hubs in its own org
+		if (ORGS[userOrg].peers[peerName]) {
-				if (!forPeers && key !== userOrg) {
+			// found a peer matching the name
-					continue;
+			let data = fs.readFileSync(path.join(__dirname, ORGS[userOrg].peers[peerName]['tls_cacerts']));
-				}
+			let grpcOpts = {
+				pem: Buffer.from(data).toString(),
+				'ssl-target-name-override': ORGS[userOrg].peers[peerName]['server-hostname']
+			};
 
-				let org = ORGS[key];
+			if (forPeers) {
-				let client = getClientForOrg(key);
+				targets.push(client.newPeer(ORGS[userOrg].peers[peerName].requests, grpcOpts));
-
+			} else {
-				for (let prop in org) {
+				let eh = client.newEventHub();
-					if (prop.indexOf('peer') === 0) {
+				eh.setPeerAddr(ORGS[userOrg].peers[peerName].events, grpcOpts);
-						if (org[prop]['requests'].indexOf(peerUrl) >= 0) {
+				targets.push(eh);
-							// found a peer matching the subject url
-							if (forPeers) {
-								let data = fs.readFileSync(path.join(__dirname, org[prop]['tls_cacerts']));
-								targets.push(client.newPeer('grpcs://' + peerUrl, {
-									pem: Buffer.from(data).toString(),
-									'ssl-target-name-override': org[prop]['server-hostname']
-								}));
-
-								continue outer;
-							} else {
-								let eh = client.newEventHub();
-								let data = fs.readFileSync(path.join(__dirname, org[prop]['tls_cacerts']));
-								eh.setPeerAddr(org[prop]['events'], {
-									pem: Buffer.from(data).toString(),
-									'ssl-target-name-override': org[prop]['server-hostname']
-								});
-								targets.push(eh);
-
-								continue outer;
-							}
-						}
-					}
-				}
 			}
 		}
+	}
 
-		if (!found) {
+	if (targets.length === 0) {
-			logger.error(util.format('Failed to find a peer matching the url %s', peerUrl));
+		logger.error(util.format('Failed to find peers matching the names %s', names));
-		}
 	}
 
 	return targets;
@@ -170,12 +143,12 @@ var getClientForOrg = function(org) {
 	return clients[org];
 };
 
-var newPeers = function(urls) {
+var newPeers = function(names, org) {
-	return newRemotes(urls, true);
+	return newRemotes(names, true, org);
 };
 
-var newEventHubs = function(urls, org) {
+var newEventHubs = function(names, org) {
-	return newRemotes(urls, false, org);
+	return newRemotes(names, false, org);
 };
 
 var getMspID = function(org) {
@@ -184,7 +157,7 @@ var getMspID = function(org) {
 };
 
 var getAdminUser = function(userOrg) {
-	var users = config.users;
+	var users = hfc.getConfigSetting('admins');
 	var username = users[0].username;
 	var password = users[0].secret;
 	var member;
@@ -325,7 +298,7 @@ var getOrgAdmin = function(userOrg) {
 };
 
 var setupChaincodeDeploy = function() {
-	process.env.GOPATH = path.join(__dirname, config.GOPATH);
+	process.env.GOPATH = path.join(__dirname, hfc.getConfigSetting('CC_SRC_PATH'));
 };
 
 var getLogger = function(moduleName) {
@@ -334,11 +307,6 @@ var getLogger = function(moduleName) {
 	return logger;
 };
 
-var getPeerAddressByName = function(org, peer) {
-	var address = ORGS[org][peer].requests;
-	return address.split('grpcs://')[1];
-};
-
 exports.getChannelForOrg = getChannelForOrg;
 exports.getClientForOrg = getClientForOrg;
 exports.getLogger = getLogger;
@@ -347,6 +315,5 @@ exports.getMspID = getMspID;
 exports.ORGS = ORGS;
 exports.newPeers = newPeers;
 exports.newEventHubs = newEventHubs;
-exports.getPeerAddressByName = getPeerAddressByName;
 exports.getRegisteredUsers = getRegisteredUsers;
 exports.getOrgAdmin = getOrgAdmin;

balance-transfer/app/install-chaincode.js

@@ -32,7 +32,7 @@ var installChaincode = function(peers, chaincodeName, chaincodePath,
 
 	return helper.getOrgAdmin(org).then((user) => {
 		var request = {
-			targets: helper.newPeers(peers),
+			targets: helper.newPeers(peers, org),
 			chaincodePath: chaincodePath,
 			chaincodeId: chaincodeName,
 			chaincodeVersion: chaincodeVersion

balance-transfer/app/instantiate-chaincode.js

@@ -20,10 +20,8 @@ var util = require('util');
 var hfc = require('fabric-client');
 var Peer = require('fabric-client/lib/Peer.js');
 var EventHub = require('fabric-client/lib/EventHub.js');
-var config = require('../config.json');
 var helper = require('./helper.js');
 var logger = helper.getLogger('instantiate-chaincode');
-hfc.addConfigFile(path.join(__dirname, 'network-config.json'));
 var ORGS = hfc.getConfigSetting('network-config');
 var tx_id = null;
 var eh = null;
@@ -49,10 +47,13 @@ var instantiateChaincode = function(channelName, chaincodeName, chaincodeVersion
 		var request = {
 			chaincodeId: chaincodeName,
 			chaincodeVersion: chaincodeVersion,
-			fcn: functionName,
 			args: args,
 			txId: tx_id
 		};
+
+		if (functionName)
+			request.fcn = functionName;
+
 		return channel.sendInstantiateProposal(request);
 	}, (err) => {
 		logger.error('Failed to initialize the channel');
@@ -88,12 +89,12 @@ var instantiateChaincode = function(channelName, chaincodeName, chaincodeVersion
 			var deployId = tx_id.getTransactionID();
 
 			eh = client.newEventHub();
-			let data = fs.readFileSync(path.join(__dirname, ORGS[org]['peer1'][
+			let data = fs.readFileSync(path.join(__dirname, ORGS[org].peers['peer1'][
 				'tls_cacerts'
 			]));
-			eh.setPeerAddr(ORGS[org]['peer1']['events'], {
+			eh.setPeerAddr(ORGS[org].peers['peer1']['events'], {
 				pem: Buffer.from(data).toString(),
-				'ssl-target-name-override': ORGS[org]['peer1']['server-hostname']
+				'ssl-target-name-override': ORGS[org].peers['peer1']['server-hostname']
 			});
 			eh.connect();
 

balance-transfer/app/invoke-transaction.js

@@ -19,18 +19,16 @@ var fs = require('fs');
 var util = require('util');
 var hfc = require('fabric-client');
 var Peer = require('fabric-client/lib/Peer.js');
-var config = require('../config.json');
 var helper = require('./helper.js');
 var logger = helper.getLogger('invoke-chaincode');
 var EventHub = require('fabric-client/lib/EventHub.js');
-hfc.addConfigFile(path.join(__dirname, 'network-config.json'));
 var ORGS = hfc.getConfigSetting('network-config');
 
-var invokeChaincode = function(peersUrls, channelName, chaincodeName, fcn, args, username, org) {
+var invokeChaincode = function(peerNames, channelName, chaincodeName, fcn, args, username, org) {
 	logger.debug(util.format('\n============ invoke transaction on organization %s ============\n', org));
 	var client = helper.getClientForOrg(org);
 	var channel = helper.getChannelForOrg(org);
-	var targets = helper.newPeers(peersUrls);
+	var targets = (peerNames) ? helper.newPeers(peerNames, org) : undefined;
 	var tx_id = null;
 
 	return helper.getRegisteredUsers(username, org).then((user) => {
@@ -38,13 +36,16 @@ var invokeChaincode = function(peersUrls, channelName, chaincodeName, fcn, args,
 		logger.debug(util.format('Sending transaction "%j"', tx_id));
 		// send proposal to endorser
 		var request = {
-			targets: targets,
 			chaincodeId: chaincodeName,
 			fcn: fcn,
 			args: args,
 			chainId: channelName,
 			txId: tx_id
 		};
+
+		if (targets)
+			request.targets = targets;
+
 		return channel.sendTransactionProposal(request);
 	}, (err) => {
 		logger.error('Failed to enroll user \'' + username + '\'. ' + err);
@@ -80,7 +81,13 @@ var invokeChaincode = function(peersUrls, channelName, chaincodeName, fcn, args,
 			var transactionID = tx_id.getTransactionID();
 			var eventPromises = [];
 
-			var eventhubs = helper.newEventHubs(peersUrls, org);
+			if (!peerNames) {
+				peerNames = channel.getPeers().map(function(peer) {
+					return peer.getName();
+				});
+			}
+
+			var eventhubs = helper.newEventHubs(peerNames, org);
 			for (let key in eventhubs) {
 				let eh = eventhubs[key];
 				eh.connect();

balance-transfer/app/join-channel.js

@@ -67,27 +67,16 @@ var joinChannel = function(channelName, peers, username, org) {
 	}).then((genesis_block) => {
 		tx_id = client.newTransactionID();
 		var request = {
-			targets: helper.newPeers(peers),
+			targets: helper.newPeers(peers, org),
 			txId: tx_id,
 			block: genesis_block
 		};
 
-		for (let key in ORGS[org]) {
+		eventhubs = helper.newEventHubs(peers, org);
-			if (ORGS[org].hasOwnProperty(key)) {
+		for (let key in eventhubs) {
-				if (key.indexOf('peer') === 0) {
+			let eh = eventhubs[key];
-					let data = fs.readFileSync(path.join(__dirname, ORGS[org][key][
+			eh.connect();
-						'tls_cacerts'
+			allEventhubs.push(eh);
-					]));
-					let eh = client.newEventHub();
-					eh.setPeerAddr(ORGS[org][key].events, {
-						pem: Buffer.from(data).toString(),
-						'ssl-target-name-override': ORGS[org][key]['server-hostname']
-					});
-					eh.connect();
-					eventhubs.push(eh);
-					allEventhubs.push(eh);
-				}
-			}
 		}
 
 		var eventPromises = [];

balance-transfer/app/network-config-aws.json

@@ -0,0 +1,55 @@
+{
+	"network-config": {
+		"orderer": {
+			"url": "grpc://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:7050",
+			"server-hostname": "orderer.example.com",
+			"tls_cacerts": "../artifacts/channel/crypto-config/ordererOrganizations/example.com/orderers/orderer.example.com/tls/ca.crt"
+		},
+		"org1": {
+			"name": "peerOrg1",
+			"mspid": "Org1MSP",
+			"ca": "https://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:7054",
+			"peers": {
+				"peer1": {
+					"requests": "grpc://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:7051",
+					"events": "grpc://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:7053",
+					"server-hostname": "peer0.org1.example.com",
+					"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt"
+				},
+				"peer2": {
+					"requests": "grpc://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:7056",
+					"events": "grpc://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:7058",
+					"server-hostname": "peer1.org1.example.com",
+					"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org1.example.com/peers/peer1.org1.example.com/tls/ca.crt"
+				}
+			},
+			"admin": {
+				"key": "../artifacts/channel/crypto-config/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp/keystore",
+				"cert": "../artifacts/channel/crypto-config/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp/signcerts"
+			}
+		},
+		"org2": {
+			"name": "peerOrg2",
+			"mspid": "Org2MSP",
+			"ca": "https://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:8054",
+			"peers": {
+				"peer1": {
+					"requests": "grpc://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:8051",
+					"events": "grpc://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:8053",
+					"server-hostname": "peer0.org2.example.com",
+					"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt"
+				},
+				"peer2": {
+					"requests": "grpc://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:8056",
+					"events": "grpc://ec2-13-59-99-140.us-east-2.compute.amazonaws.com:8058",
+					"server-hostname": "peer1.org2.example.com",
+					"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org2.example.com/peers/peer1.org2.example.com/tls/ca.crt"
+				}
+			},
+			"admin": {
+				"key": "../artifacts/channel/crypto-config/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp/keystore",
+				"cert": "../artifacts/channel/crypto-config/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp/signcerts"
+			}
+		}
+	}
+}

balance-transfer/app/network-config.json

@@ -9,17 +9,19 @@
 			"name": "peerOrg1",
 			"mspid": "Org1MSP",
 			"ca": "https://localhost:7054",
-			"peer1": {
+			"peers": {
-				"requests": "grpcs://localhost:7051",
+				"peer1": {
-				"events": "grpcs://localhost:7053",
+					"requests": "grpcs://localhost:7051",
-				"server-hostname": "peer0.org1.example.com",
+					"events": "grpcs://localhost:7053",
-				"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt"
+					"server-hostname": "peer0.org1.example.com",
-			},
+					"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt"
-			"peer2": {
+				},
-				"requests": "grpcs://localhost:7056",
+				"peer2": {
-				"events": "grpcs://localhost:7058",
+					"requests": "grpcs://localhost:7056",
-				"server-hostname": "peer1.org1.example.com",
+					"events": "grpcs://localhost:7058",
-				"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org1.example.com/peers/peer1.org1.example.com/tls/ca.crt"
+					"server-hostname": "peer1.org1.example.com",
+					"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org1.example.com/peers/peer1.org1.example.com/tls/ca.crt"
+				}	
 			},
 			"admin": {
 				"key": "../artifacts/channel/crypto-config/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp/keystore",
@@ -30,17 +32,19 @@
 			"name": "peerOrg2",
 			"mspid": "Org2MSP",
 			"ca": "https://localhost:8054",
-			"peer1": {
+			"peers": {
-				"requests": "grpcs://localhost:8051",
+				"peer1": {
-				"events": "grpcs://localhost:8053",
+					"requests": "grpcs://localhost:8051",
-				"server-hostname": "peer0.org2.example.com",
+					"events": "grpcs://localhost:8053",
-				"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt"
+					"server-hostname": "peer0.org2.example.com",
-			},
+					"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt"
-			"peer2": {
+				},
-				"requests": "grpcs://localhost:8056",
+				"peer2": {
-				"events": "grpcs://localhost:8058",
+					"requests": "grpcs://localhost:8056",
-				"server-hostname": "peer1.org2.example.com",
+					"events": "grpcs://localhost:8058",
-				"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org2.example.com/peers/peer1.org2.example.com/tls/ca.crt"
+					"server-hostname": "peer1.org2.example.com",
+					"tls_cacerts": "../artifacts/channel/crypto-config/peerOrganizations/org2.example.com/peers/peer1.org2.example.com/tls/ca.crt"
+				}	
 			},
 			"admin": {
 				"key": "../artifacts/channel/crypto-config/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp/keystore",

balance-transfer/app/query.js

@@ -261,7 +261,7 @@ var getChannels = function(peer, username, org) {
 function buildTarget(peer, org) {
 	var target = null;
 	if (typeof peer !== 'undefined') {
-		let targets = helper.newPeers([helper.getPeerAddressByName(org, peer)]);
+		let targets = helper.newPeers([peer], org);
 		if (targets && targets.length > 0) target = targets[0];
 	}
 

balance-transfer/config.js

@@ -0,0 +1,14 @@
+var util = require('util');
+var path = require('path');
+var hfc = require('fabric-client');
+
+var file = 'network-config%s.json';
+
+var env = process.env.TARGET_NETWORK;
+if (env)
+	file = util.format(file, '-' + env);
+else
+	file = util.format(file, '');
+
+hfc.addConfigFile(path.join(__dirname, 'app', file));
+hfc.addConfigFile(path.join(__dirname, 'config.json'));

balance-transfer/config.json

@@ -3,11 +3,10 @@
    "port":"4000",
    "jwt_expiretime": "36000",
    "channelName":"mychannel",
-   "GOPATH":"../artifacts",
+   "CC_SRC_PATH":"../artifacts",
    "keyValueStore":"/tmp/fabric-client-kvs",
    "eventWaitTime":"30000",
-   "orderer":"grpcs://localhost:7050",
+   "admins":[
-   "users":[
       {
          "username":"admin",
          "secret":"adminpw"

balance-transfer/package.json

@@ -2,15 +2,18 @@
   "name": "balance-transfer",
   "version": "1.0.0",
   "description": "A balance-transfer example node program to demonstrate using node.js SDK APIs",
-  "main": "app/app.js",
+  "main": "app.js",
+  "scripts": {
+    "start": "node app.js"
+  },
   "keywords": [
     "fabric-client sample app",
     "balance-transfer node sample",
     "v1.0 fabric nodesdk sample"
   ],
   "engines": {
-    "node": ">=6.9.5",
+    "node": ">=6.9.5 <7.0",
-    "npm": ">=3.10.10"
+    "npm": ">=3.10.10 <4.0"
   },
   "license": "Apache-2.0",
   "dependencies": {

balance-transfer/testAPIs.sh

@@ -56,7 +56,7 @@ curl -s -X POST \
   -H "authorization: Bearer $ORG1_TOKEN" \
   -H "content-type: application/json" \
   -d '{
-	"peers": ["localhost:7051","localhost:7056"]
+	"peers": ["peer1","peer2"]
 }'
 echo
 echo
@@ -68,7 +68,7 @@ curl -s -X POST \
   -H "authorization: Bearer $ORG2_TOKEN" \
   -H "content-type: application/json" \
   -d '{
-	"peers": ["localhost:8051","localhost:8056"]
+	"peers": ["peer1","peer2"]
 }'
 echo
 echo
@@ -80,7 +80,7 @@ curl -s -X POST \
   -H "authorization: Bearer $ORG1_TOKEN" \
   -H "content-type: application/json" \
   -d '{
-	"peers": ["localhost:7051","localhost:7056"],
+	"peers": ["peer1", "peer2"],
 	"chaincodeName":"mycc",
 	"chaincodePath":"github.com/example_cc",
 	"chaincodeVersion":"v0"
@@ -96,7 +96,7 @@ curl -s -X POST \
   -H "authorization: Bearer $ORG2_TOKEN" \
   -H "content-type: application/json" \
   -d '{
-	"peers": ["localhost:8051","localhost:8056"],
+	"peers": ["peer1","peer2"],
 	"chaincodeName":"mycc",
 	"chaincodePath":"github.com/example_cc",
 	"chaincodeVersion":"v0"
@@ -113,7 +113,6 @@ curl -s -X POST \
   -d '{
 	"chaincodeName":"mycc",
 	"chaincodeVersion":"v0",
-	"fcn":"init",
 	"args":["a","100","b","200"]
 }'
 echo
@@ -126,7 +125,6 @@ TRX_ID=$(curl -s -X POST \
   -H "authorization: Bearer $ORG1_TOKEN" \
   -H "content-type: application/json" \
   -d '{
-	"peers": ["localhost:7051", "localhost:8051"],
 	"fcn":"move",
 	"args":["a","b","10"]
 }')