[FAB-12173] balance-transfer: Update anchor peers

Currently, balance-transfer does not have anchor peer
configuration. As a result, users are unable to use private data
and can't take advantage of service discovery.
This CR adds a function and modifies a test script to update
anchor peers at the setup.

Change-Id: Icbd7e4eb2e3bbcb187a083e94c616ef4825c5fb4
Signed-off-by: Yuki Kondo <yuki.kondo@hal.hitachi.com>

balance-transfer/app.js

@@ -34,6 +34,7 @@ var hfc = require('fabric-client');
 var helper = require('./app/helper.js');
 var createChannel = require('./app/create-channel.js');
 var join = require('./app/join-channel.js');
+var updateAnchorPeers = require('./app/update-anchor-peers.js');
 var install = require('./app/install-chaincode.js');
 var instantiate = require('./app/instantiate-chaincode.js');
 var invoke = require('./app/invoke-transaction.js');
@@ -179,6 +180,25 @@ app.post('/channels/:channelName/peers', async function(req, res) {
 	let message =  await join.joinChannel(channelName, peers, req.username, req.orgname);
 	res.send(message);
 });
+// Update anchor peers
+app.post('/channels/:channelName/anchorpeers', async function(req, res) {
+	logger.debug('==================== UPDATE ANCHOR PEERS ==================');
+	var channelName = req.params.channelName;
+	var configUpdatePath = req.body.configUpdatePath;
+	logger.debug('Channel name : ' + channelName);
+	logger.debug('configUpdatePath : ' + configUpdatePath);
+	if (!channelName) {
+		res.json(getErrorMessage('\'channelName\''));
+		return;
+	}
+	if (!configUpdatePath) {
+		res.json(getErrorMessage('\'configUpdatePath\''));
+		return;
+	}
+
+	let message = await updateAnchorPeers.updateAnchorPeers(channelName, configUpdatePath, req.username, req.orgname);
+	res.send(message);
+});
 // Install chaincode on target peers
 app.post('/chaincodes', async function(req, res) {
 	logger.debug('==================== INSTALL CHAINCODE ==================');

balance-transfer/app/update-anchor-peers.js

@@ -0,0 +1,114 @@
+/**
+ * Copyright Hitachi America, Ltd. All Rights Reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+'use strict';
+var util = require('util');
+var fs = require('fs');
+var path = require('path');
+
+var helper = require('./helper.js');
+var logger = helper.getLogger('update-anchor-peers');
+
+var updateAnchorPeers = async function(channelName, configUpdatePath, username, org_name) {
+	logger.debug('\n====== Updating Anchor Peers on \'' + channelName + '\' ======\n');
+	var error_message = null;
+	try {
+		// first setup the client for this org
+		var client = await helper.getClientForOrg(org_name, username);
+		logger.debug('Successfully got the fabric client for the organization "%s"', org_name);
+		var channel = client.getChannel(channelName);
+		if(!channel) {
+			let message = util.format('Channel %s was not defined in the connection profile', channelName);
+			logger.error(message);
+			throw new Error(message);
+		}
+
+		// read in the envelope for the channel config raw bytes
+		var envelope = fs.readFileSync(path.join(__dirname, configUpdatePath));
+		// extract the channel config bytes from the envelope to be signed
+		var channelConfig = client.extractChannelConfig(envelope);
+
+		//Acting as a client in the given organization provided with "orgName" param
+		// sign the channel config bytes as "endorsement", this is required by
+		// the orderer's channel creation policy
+		// this will use the admin identity assigned to the client when the connection profile was loaded
+		let signature = client.signChannelConfig(channelConfig);
+
+		let request = {
+			config: channelConfig,
+			signatures: [signature],
+			name: channelName,
+			txId: client.newTransactionID(true) // get an admin based transactionID
+		};
+
+		var promises = [];
+		let event_hubs = channel.getChannelEventHubsForOrg();
+		logger.debug('found %s eventhubs for this organization %s',event_hubs.length, org_name);
+		event_hubs.forEach((eh) => {
+			let anchorUpdateEventPromise = new Promise((resolve, reject) => {
+				logger.debug('anchorUpdateEventPromise - setting up event');
+				let event_timeout = setTimeout(() => {
+					let message = 'REQUEST_TIMEOUT:' + eh.getPeerAddr();
+					logger.error(message);
+					eh.disconnect();
+				}, 60000);
+				eh.registerBlockEvent((block) => {
+					logger.info('The config update has been committed on peer %s',eh.getPeerAddr());
+					clearTimeout(event_timeout);
+					resolve();
+				}, (err) => {
+					clearTimeout(event_timeout);
+					logger.error(err);
+					reject(err);
+				},
+					// the default for 'unregister' is true for block listeners
+					// so no real need to set here, however for 'disconnect'
+					// the default is false as most event hubs are long running
+					// in this use case we are using it only once
+					{unregister: true, disconnect: true}
+				);
+				eh.connect();
+			});
+			promises.push(anchorUpdateEventPromise);
+		});
+
+		var sendPromise = client.updateChannel(request);
+		// put the send to the orderer last so that the events get registered and
+		// are ready for the orderering and committing
+		promises.push(sendPromise);
+		let results = await Promise.all(promises);
+		logger.debug(util.format('------->>> R E S P O N S E : %j', results));
+		let response = results.pop(); //  orderer results are last in the results
+
+		if (response && response.status === 'SUCCESS') {
+			logger.info('Successfully update anchor peers to the channel %s', channelName);
+		} else {
+			error_message = util.format('Failed to update anchor peers to the channel %s', channelName);
+			logger.error(error_message);
+		}
+	} catch (error) {
+		logger.error('Failed to update anchor peers due to error: ' + error.stack ? error.stack :	error);
+		error_message = error.toString();
+	}
+
+	if (!error_message) {
+		let message = util.format(
+			'Successfully update anchor peers in organization %s to the channel \'%s\'',
+			org_name, channelName);
+		logger.info(message);
+		let response = {
+			success: true,
+			message: message
+		};
+		return response;
+	} else {
+		let message = util.format('Failed to update anchor peers. cause:%s',error_message);
+		logger.error(message);
+		throw new Error(message);
+	}
+};
+
+exports.updateAnchorPeers = updateAnchorPeers;

balance-transfer/testAPIs.sh

@@ -112,6 +112,30 @@ curl -s -X POST \
 echo
 echo
 
+echo "POST request Update anchor peers on Org1"
+echo
+curl -s -X POST \
+  http://localhost:4000/channels/mychannel/anchorpeers \
+  -H "authorization: Bearer $ORG1_TOKEN" \
+  -H "content-type: application/json" \
+  -d '{
+	"configUpdatePath":"../artifacts/channel/Org1MSPanchors.tx"
+}'
+echo
+echo
+
+echo "POST request Update anchor peers on Org2"
+echo
+curl -s -X POST \
+  http://localhost:4000/channels/mychannel/anchorpeers \
+  -H "authorization: Bearer $ORG2_TOKEN" \
+  -H "content-type: application/json" \
+  -d '{
+	"configUpdatePath":"../artifacts/channel/Org2MSPanchors.tx"
+}'
+echo
+echo
+
 echo "POST Install chaincode on Org1"
 echo
 curl -s -X POST \