BE-876 Stop unnecessary discovery request (#255)

Explorer was making multiple `sendDiscoveryRequest` calls, 1 per block,
which retrieves the same information.

Signed-off-by: Atsushi Neki <nekiaiken@gmail.com>

app/platform/fabric/sync/FabricEvent.ts

@@ -66,7 +66,12 @@ export class FabricEvent {
 				async event => {
 					// Skip first block, it is process by peer event hub
 					if (!(event.blockNumber.low === 0 && event.blockNumber.high === 0)) {
-						await this.fabricServices.processBlockEvent(this.client, event.blockData);
+						const noDiscovery = false;
+						await this.fabricServices.processBlockEvent(
+							this.client,
+							event.blockData,
+							noDiscovery
+						);
 					}
 				},
 				{

app/platform/fabric/sync/SyncPlatform.ts

@@ -117,10 +117,11 @@ export class SyncPlatform {
 		 * Setting interval for validating any missing block from the current client ledger
 		 * Set blocksSyncTime property in platform config.json in minutes
 		 */
-		(function validateMissingBlocks(sync) {
-			sync.isChannelEventHubConnected();
-			setTimeout(validateMissingBlocks, sync.blocksSyncTime, sync);
-		})(this);
+		// During initial sync-up phase, disable discovery request
+		(function validateMissingBlocks(sync: SyncPlatform, noDiscovery: boolean) {
+			sync.isChannelEventHubConnected(noDiscovery);
+			setTimeout(validateMissingBlocks, sync.blocksSyncTime, sync, false);
+		})(this, true);
 
 		logger.debug(
 			'******* Initialization end for child client process %s ******',
@@ -133,12 +134,12 @@ export class SyncPlatform {
 	 *
 	 * @memberof SyncPlatform
 	 */
-	async isChannelEventHubConnected() {
+	async isChannelEventHubConnected(noDiscovery: boolean) {
 		for (const channel_name of this.client.getChannels()) {
 			// Validate channel event is connected
 			const status = this.eventHub.isChannelEventHubConnected(channel_name);
 			if (status) {
-				await this.syncService.syncBlocks(this.client, channel_name);
+				await this.syncService.syncBlocks(this.client, channel_name, noDiscovery);
 			} else {
 				// Channel client is not connected then it will reconnect
 				this.eventHub.connectChannelEventHub(channel_name);

app/platform/fabric/sync/SyncService.ts

@@ -357,18 +357,16 @@ export class SyncServices {
 			.saveChaincodPeerRef(network_id, chaincode_peer_row);
 	}
 
-	async syncBlocks(client, channel_name) {
+	async syncBlocks(client, channel_name, noDiscovery) {
 		const network_id = client.getNetworkId();
 
-    // Get channel information from ledger
-    const channelInfo = await client.fabricGateway.queryChainInfo(channel_name);
+		// Get channel information from ledger
+		const channelInfo = await client.fabricGateway.queryChainInfo(channel_name);
 
-    if (!channelInfo) {
-      logger.info(
-        `syncBlocks: Failed to retrieve channelInfo >> ${channel_name}`,
-      );
-      return;
-    }
+		if (!channelInfo) {
+			logger.info(`syncBlocks: Failed to retrieve channelInfo >> ${channel_name}`);
+			return;
+		}
 		const synch_key = `${network_id}_${channel_name}`;
 		logger.info(`syncBlocks: Start >> ${synch_key}`);
 		if (this.synchInProcess.includes(synch_key)) {
@@ -393,7 +391,7 @@ export class SyncServices {
 						result.missing_id
 					);
 					if (block) {
-						await this.processBlockEvent(client, block);
+						await this.processBlockEvent(client, block, noDiscovery);
 					}
 				} catch {
 					logger.error(`Failed to process Block # ${result.missing_id}`);
@@ -410,7 +408,6 @@ export class SyncServices {
 	async updateDiscoveredChannel(client, channel_name, channel_genesis_hash) {
 		const network_id = client.getNetworkId();
 		// get discovery and insert new peer, orders details to db
-		await client.initializeChannelFromDiscover(channel_name);
 		await this.insertFromDiscoveryResults(
 			client,
 			channel_name,
@@ -459,7 +456,7 @@ export class SyncServices {
 	 * @returns
 	 * @memberof SyncServices
 	 */
-	async processBlockEvent(client, block) {
+	async processBlockEvent(client, block, noDiscovery) {
 		const network_id = client.getNetworkId();
 		// Get the first transaction
 		const first_tx = block.data.data[0];
@@ -492,7 +489,10 @@ export class SyncServices {
 		}
 		this.blocksInProcess.push(blockPro_key);
 
-		if (header.channel_header.typeString === fabric_const.BLOCK_TYPE_CONFIG) {
+		if (
+			!noDiscovery &&
+			header.channel_header.typeString === fabric_const.BLOCK_TYPE_CONFIG
+		) {
 			setTimeout(
 				async (cli, chName, chGenHash) => {
 					await this.updateDiscoveredChannel(cli, chName, chGenHash);
@@ -629,9 +629,11 @@ export class SyncServices {
 			const chaincode_id = String.fromCharCode.apply(null, chaincodeID);
 			// checking new chaincode is deployed
 			if (
+				!noDiscovery &&
 				header.channel_header.typeString ===
 					fabric_const.BLOCK_TYPE_ENDORSER_TRANSACTION &&
-				chaincode === fabric_const.CHAINCODE_LSCC
+				(chaincode === fabric_const.CHAINCODE_LSCC ||
+					chaincode === fabric_const.CHAINCODE_LIFECYCLE)
 			) {
 				setTimeout(
 					async (cli, chName, chGenHash) => {

app/platform/fabric/utils/FabricConst.ts

@@ -9,6 +9,7 @@ export const fabric = {
 		BLOCK_TYPE_CONFIG: 'CONFIG',
 		BLOCK_TYPE_ENDORSER_TRANSACTION: 'ENDORSER_TRANSACTION',
 		CHAINCODE_LSCC: 'lscc',
+		CHAINCODE_LIFECYCLE: '_lifecycle',
 		NOTITY_TYPE_NEWCHANNEL: '1',
 		NOTITY_TYPE_UPDATECHANNEL: '2',
 		NOTITY_TYPE_CHAINCODE: '3',

app/test/SyncService.test.ts

@@ -10,6 +10,7 @@ import sinon from 'sinon';
 import { SyncServices } from '../platform/fabric/sync/SyncService';
 import * as stubBlock from './block.json';
 import * as stubConfigBlock from './block_config.json';
+import * as stubLifecycleBlock from './block_lifecycle.json';
 
 import { ExplorerError } from '../common/ExplorerError';
 import * as FabricConst from '../platform/fabric/utils/FabricConst';
@@ -128,8 +129,8 @@ describe('processBlockEvent', () => {
 	it('should return without error', async () => {
 		const stubClient = setupClient();
 
-		await expect(sync.processBlockEvent(stubClient, stubBlock)).eventually.to.be
-			.true;
+		await expect(sync.processBlockEvent(stubClient, stubBlock, false)).eventually
+			.to.be.true;
 		sinon.assert.calledOnce(stubPlatform.send);
 		sinon.assert.calledWith(
 			stubPlatform.send,
@@ -142,7 +143,7 @@ describe('processBlockEvent', () => {
 		const stubClient = setupClient();
 		sync.blocksInProcess = ['mychannel_9'];
 
-		await expect(sync.processBlockEvent(stubClient, stubBlock))
+		await expect(sync.processBlockEvent(stubClient, stubBlock, false))
 			.to.eventually.be.rejectedWith('Block already in processing')
 			.and.be.an.instanceOf(ExplorerError);
 		sinon.assert.notCalled(stubPlatform.send);
@@ -158,7 +159,7 @@ describe('processBlockEvent', () => {
 		const spyInsertDiscoveredCH = sinon.spy(sync, 'insertDiscoveredChannel');
 
 		const clock = sinon.useFakeTimers();
-		await expect(sync.processBlockEvent(stubClient, stubBlock))
+		await expect(sync.processBlockEvent(stubClient, stubBlock, false))
 			.to.eventually.be.rejectedWith('mychannel has not been inserted yet')
 			.and.be.an.instanceOf(ExplorerError);
 		clock.tick(20000);
@@ -174,7 +175,7 @@ describe('processBlockEvent', () => {
 		const spyUpdateDiscoveredCH = sinon.spy(sync, 'updateDiscoveredChannel');
 
 		const clock = sinon.useFakeTimers();
-		await expect(sync.processBlockEvent(stubClient, stubConfigBlock)).to
+		await expect(sync.processBlockEvent(stubClient, stubConfigBlock, false)).to
 			.eventually.to.be.true;
 		clock.tick(20000);
 
@@ -199,7 +200,14 @@ describe('processBlockEvent', () => {
 		const stubClient = setupClient();
 
 		stubConfigBlock.data.data[0].payload.data.last_update.payload = null;
-		await expect(sync.processBlockEvent(stubClient, stubConfigBlock)).to
+		await expect(sync.processBlockEvent(stubClient, stubConfigBlock, false)).to
+			.eventually.to.be.true;
+	});
+
+	it('should be done without any errors when _lifecycle block is processed', async () => {
+		const stubClient = setupClient();
+
+		await expect(sync.processBlockEvent(stubClient, stubLifecycleBlock, false)).to
 			.eventually.to.be.true;
 	});
 });
@@ -219,7 +227,7 @@ describe('syncBlocks', () => {
 		const stubClient = setupClient();
 		const stubProcessBlockEvent = sinon.stub(sync, 'processBlockEvent');
 
-		await sync.syncBlocks(stubClient, VALID_CHANNEL_NAME);
+		await sync.syncBlocks(stubClient, VALID_CHANNEL_NAME, false);
 		expect(stubProcessBlockEvent.calledTwice).to.be.true;
 		stubProcessBlockEvent.restore();
 	});
@@ -230,7 +238,7 @@ describe('syncBlocks', () => {
 		stubProcessBlockEvent.onFirstCall().throws('Block already in processing');
 		stubError.reset();
 
-		await sync.syncBlocks(stubClient, VALID_CHANNEL_NAME);
+		await sync.syncBlocks(stubClient, VALID_CHANNEL_NAME, false);
 		expect(stubProcessBlockEvent.calledTwice).to.be.true;
 		expect(stubError.calledWith('Failed to process Block # 1')).to.be.true;
 		expect(stubError.calledWith('Failed to process Block # 2')).to.be.false;