Implement failover for RPC endpoints in watcher

lerna.json

@@ -2,7 +2,7 @@
   "packages": [
     "packages/*"
   ],
-  "version": "0.2.85",
+  "version": "0.2.86",
   "npmClient": "yarn",
   "useWorkspaces": true,
   "command": {

packages/cache/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/cache",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "description": "Generic object cache",
   "main": "dist/index.js",
   "scripts": {

packages/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/cli",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "main": "dist/index.js",
   "license": "AGPL-3.0",
   "scripts": {
@@ -15,13 +15,13 @@
   },
   "dependencies": {
     "@apollo/client": "^3.7.1",
-    "@cerc-io/cache": "^0.2.85",
-    "@cerc-io/ipld-eth-client": "^0.2.85",
+    "@cerc-io/cache": "^0.2.86",
+    "@cerc-io/ipld-eth-client": "^0.2.86",
     "@cerc-io/libp2p": "^0.42.2-laconic-0.1.4",
     "@cerc-io/nitro-node": "^0.1.15",
-    "@cerc-io/peer": "^0.2.85",
-    "@cerc-io/rpc-eth-client": "^0.2.85",
-    "@cerc-io/util": "^0.2.85",
+    "@cerc-io/peer": "^0.2.86",
+    "@cerc-io/rpc-eth-client": "^0.2.86",
+    "@cerc-io/util": "^0.2.86",
     "@ethersproject/providers": "^5.4.4",
     "@graphql-tools/utils": "^9.1.1",
     "@ipld/dag-cbor": "^8.0.0",

packages/cli/src/job-runner.ts

@@ -7,6 +7,8 @@ import { hideBin } from 'yargs/helpers';
 import 'reflect-metadata';
 import assert from 'assert';
 import { ConnectionOptions } from 'typeorm';
+import { errors } from 'ethers';
+import debug from 'debug';
 
 import { JsonRpcProvider } from '@ethersproject/providers';
 import {
@@ -20,10 +22,14 @@ import {
   GraphWatcherInterface,
   startMetricsServer,
   Config,
-  UpstreamConfig
+  UpstreamConfig,
+  NEW_BLOCK_MAX_RETRIES_ERROR
 } from '@cerc-io/util';
 
 import { BaseCmd } from './base';
+import { initClients } from './utils/index';
+
+const log = debug('vulcanize:job-runner');
 
 interface Arguments {
   configFile: string;
@@ -33,6 +39,10 @@ export class JobRunnerCmd {
   _argv?: Arguments;
   _baseCmd: BaseCmd;
 
+  _currentEndpointIndex = {
+    rpcProviderEndpoint: 0
+  };
+
   constructor () {
     this._baseCmd = new BaseCmd();
   }
@@ -110,7 +120,27 @@ export class JobRunnerCmd {
       await indexer.addContracts();
     }
 
-    const jobRunner = new JobRunner(config.jobQueue, indexer, jobQueue);
+    const jobRunner = new JobRunner(
+      config.jobQueue,
+      indexer,
+      jobQueue,
+      async (error: any) => {
+        // Check if it is a server error or timeout from ethers.js
+        // https://docs.ethers.org/v5/api/utils/logger/#errors--server-error
+        // https://docs.ethers.org/v5/api/utils/logger/#errors--timeout
+        if (error.code === errors.SERVER_ERROR || error.code === errors.TIMEOUT || error.message === NEW_BLOCK_MAX_RETRIES_ERROR) {
+          const oldRpcEndpoint = config.upstream.ethServer.rpcProviderEndpoints[this._currentEndpointIndex.rpcProviderEndpoint];
+          ++this._currentEndpointIndex.rpcProviderEndpoint;
+
+          if (this._currentEndpointIndex.rpcProviderEndpoint === config.upstream.ethServer.rpcProviderEndpoints.length) {
+            this._currentEndpointIndex.rpcProviderEndpoint = 0;
+          }
+
+          const { ethClient, ethProvider } = await initClients(config, this._currentEndpointIndex);
+          indexer.switchClients({ ethClient, ethProvider });
+          log(`RPC endpoint ${oldRpcEndpoint} is not working; failing over to new RPC endpoint ${ethProvider.connection.url}`);
+        }
+      });
 
     // Delete all active and pending (before completed) jobs to start job-runner without old queued jobs
     await jobRunner.jobQueue.deleteAllJobs('completed');
@@ -121,7 +151,7 @@ export class JobRunnerCmd {
     await startJobRunner(jobRunner);
     jobRunner.handleShutdown();
 
-    await startMetricsServer(config, indexer);
+    await startMetricsServer(config, indexer, this._currentEndpointIndex);
   }
 
   _getArgv (): any {

packages/cli/src/utils/index.ts

@@ -22,7 +22,7 @@ export function readPeerId (filePath: string): PeerIdObj {
   return JSON.parse(peerIdJson);
 }
 
-export const initClients = async (config: Config): Promise<{
+export const initClients = async (config: Config, endpointIndexes = { rpcProviderEndpoint: 0 }): Promise<{
   ethClient: EthClient,
   ethProvider: providers.JsonRpcProvider
 }> => {
@@ -32,30 +32,32 @@ export const initClients = async (config: Config): Promise<{
   assert(dbConfig, 'Missing database config');
   assert(upstreamConfig, 'Missing upstream config');
 
-  const { ethServer: { gqlApiEndpoint, rpcProviderEndpoint, rpcClient = false }, cache: cacheConfig } = upstreamConfig;
+  const { ethServer: { gqlApiEndpoint, rpcProviderEndpoints, rpcClient = false }, cache: cacheConfig } = upstreamConfig;
 
-  assert(rpcProviderEndpoint, 'Missing upstream ethServer.rpcProviderEndpoint');
+  assert(rpcProviderEndpoints, 'Missing upstream ethServer.rpcProviderEndpoints');
+  assert(rpcProviderEndpoints.length, 'No endpoints configured in ethServer.rpcProviderEndpoints');
 
   const cache = await getCache(cacheConfig);
 
   let ethClient: EthClient;
 
   if (rpcClient) {
     ethClient = new RpcEthClient({
-      rpcEndpoint: rpcProviderEndpoint,
+      rpcEndpoint: rpcProviderEndpoints[endpointIndexes.rpcProviderEndpoint],
       cache
     });
   } else {
     assert(gqlApiEndpoint, 'Missing upstream ethServer.gqlApiEndpoint');
 
+    // TODO: Implement failover for GQL endpoint
     ethClient = new GqlEthClient({
       gqlEndpoint: gqlApiEndpoint,
       cache
     });
   }
 
   const ethProvider = getCustomProvider({
-    url: rpcProviderEndpoint,
+    url: rpcProviderEndpoints[endpointIndexes.rpcProviderEndpoint],
     allowGzip: true
   });
 

packages/codegen/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/codegen",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "description": "Code generator",
   "private": true,
   "main": "index.js",
@@ -20,7 +20,7 @@
   },
   "homepage": "https://github.com/cerc-io/watcher-ts#readme",
   "dependencies": {
-    "@cerc-io/util": "^0.2.85",
+    "@cerc-io/util": "^0.2.86",
     "@graphql-tools/load-files": "^6.5.2",
     "@npmcli/package-json": "^5.0.0",
     "@poanet/solidity-flattener": "https://github.com/vulcanize/solidity-flattener.git",

packages/codegen/src/templates/config-template.handlebars

@@ -63,7 +63,9 @@
 [upstream]
   [upstream.ethServer]
     gqlApiEndpoint = "http://127.0.0.1:8082/graphql"
-    rpcProviderEndpoint = "http://127.0.0.1:8081"
+    rpcProviderEndpoints = [
+      "http://127.0.0.1:8081"
+    ]
 
     # Boolean flag to specify if rpc-eth-client should be used for RPC endpoint instead of ipld-eth-client (ipld-eth-server GQL client)
     rpcClient = false
@@ -100,3 +102,6 @@
   # Max block range of historical processing after which it waits for completion of events processing
   # If set to -1 historical processing does not wait for events processing and completes till latest canonical block
   historicalMaxFetchAhead = 10000
+
+  # Max number of retries to fetch new block after which watcher will failover to other RPC endpoints
+  maxNewBlockRetries = 3

packages/codegen/src/templates/indexer-template.handlebars

@@ -199,6 +199,15 @@ export class Indexer implements IndexerInterface {
     await this._baseIndexer.fetchStateStatus();
   }
 
+  switchClients ({ ethClient, ethProvider }: { ethClient: EthClient, ethProvider: BaseProvider }): void {
+    this._ethClient = ethClient;
+    this._ethProvider = ethProvider;
+    this._baseIndexer.switchClients({ ethClient, ethProvider });
+    {{#if (subgraphPath)}}
+    this._graphWatcher.switchClients({ ethClient, ethProvider });
+    {{/if}}
+  }
+
   {{#if (subgraphPath)}}
   async getMetaData (block: BlockHeight): Promise<ResultMeta | null> {
     return this._baseIndexer.getMetaData(block);

packages/codegen/src/templates/package-template.handlebars

@@ -41,12 +41,12 @@
   "homepage": "https://github.com/cerc-io/watcher-ts#readme",
   "dependencies": {
     "@apollo/client": "^3.3.19",
-    "@cerc-io/cli": "^0.2.85",
-    "@cerc-io/ipld-eth-client": "^0.2.85",
-    "@cerc-io/solidity-mapper": "^0.2.85",
-    "@cerc-io/util": "^0.2.85",
+    "@cerc-io/cli": "^0.2.86",
+    "@cerc-io/ipld-eth-client": "^0.2.86",
+    "@cerc-io/solidity-mapper": "^0.2.86",
+    "@cerc-io/util": "^0.2.86",
     {{#if (subgraphPath)}}
-    "@cerc-io/graph-node": "^0.2.85",
+    "@cerc-io/graph-node": "^0.2.86",
     {{/if}}
     "@ethersproject/providers": "^5.4.4",
     "debug": "^4.3.1",

packages/graph-node/package.json

@@ -1,10 +1,10 @@
 {
   "name": "@cerc-io/graph-node",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "main": "dist/index.js",
   "license": "AGPL-3.0",
   "devDependencies": {
-    "@cerc-io/solidity-mapper": "^0.2.85",
+    "@cerc-io/solidity-mapper": "^0.2.86",
     "@ethersproject/providers": "^5.4.4",
     "@graphprotocol/graph-ts": "^0.22.0",
     "@nomiclabs/hardhat-ethers": "^2.0.2",
@@ -51,9 +51,9 @@
   "dependencies": {
     "@apollo/client": "^3.3.19",
     "@cerc-io/assemblyscript": "0.19.10-watcher-ts-0.1.2",
-    "@cerc-io/cache": "^0.2.85",
-    "@cerc-io/ipld-eth-client": "^0.2.85",
-    "@cerc-io/util": "^0.2.85",
+    "@cerc-io/cache": "^0.2.86",
+    "@cerc-io/ipld-eth-client": "^0.2.86",
+    "@cerc-io/util": "^0.2.86",
     "@types/json-diff": "^0.5.2",
     "@types/yargs": "^17.0.0",
     "bn.js": "^4.11.9",

packages/graph-node/src/watcher.ts

@@ -129,6 +129,11 @@ export class GraphWatcher {
     this.fillEventSignatureMap();
   }
 
+  async switchClients ({ ethClient, ethProvider }: { ethClient: EthClient, ethProvider: providers.BaseProvider }) {
+    this._ethClient = ethClient;
+    this._ethProvider = ethProvider;
+  }
+
   fillEventSignatureMap () {
     this._dataSources.forEach(contract => {
       if (contract.kind === 'ethereum/contract' && contract.mapping.kind === 'ethereum/events') {

packages/graph-node/test/utils/indexer.ts

@@ -2,6 +2,7 @@
 
 import assert from 'assert';
 import { DeepPartial, FindConditions, FindManyOptions } from 'typeorm';
+import { providers } from 'ethers';
 
 import {
   IndexerInterface,
@@ -338,4 +339,8 @@ export class Indexer implements IndexerInterface {
   async getFullTransactions (txHashList: string[]): Promise<EthFullTransaction[]> {
     return [];
   }
+
+  switchClients ({ ethClient, ethProvider }: { ethClient: EthClient, ethProvider: providers.BaseProvider }): void {
+    return undefined;
+  }
 }

packages/ipld-eth-client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/ipld-eth-client",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "description": "IPLD ETH Client",
   "main": "dist/index.js",
   "scripts": {
@@ -20,8 +20,8 @@
   "homepage": "https://github.com/cerc-io/watcher-ts#readme",
   "dependencies": {
     "@apollo/client": "^3.7.1",
-    "@cerc-io/cache": "^0.2.85",
-    "@cerc-io/util": "^0.2.85",
+    "@cerc-io/cache": "^0.2.86",
+    "@cerc-io/util": "^0.2.86",
     "cross-fetch": "^3.1.4",
     "debug": "^4.3.1",
     "ethers": "^5.4.4",

packages/peer/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/peer",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "description": "libp2p module",
   "main": "dist/index.js",
   "exports": "./dist/index.js",

packages/rpc-eth-client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/rpc-eth-client",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "description": "RPC ETH Client",
   "main": "dist/index.js",
   "scripts": {
@@ -19,9 +19,9 @@
   },
   "homepage": "https://github.com/cerc-io/watcher-ts#readme",
   "dependencies": {
-    "@cerc-io/cache": "^0.2.85",
-    "@cerc-io/ipld-eth-client": "^0.2.85",
-    "@cerc-io/util": "^0.2.85",
+    "@cerc-io/cache": "^0.2.86",
+    "@cerc-io/ipld-eth-client": "^0.2.86",
+    "@cerc-io/util": "^0.2.86",
     "chai": "^4.3.4",
     "ethers": "^5.4.4",
     "left-pad": "^1.3.0",

packages/solidity-mapper/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/solidity-mapper",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "main": "dist/index.js",
   "license": "AGPL-3.0",
   "devDependencies": {

packages/test/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/test",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "main": "dist/index.js",
   "license": "AGPL-3.0",
   "private": true,

packages/tracing-client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cerc-io/tracing-client",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "description": "ETH VM tracing client",
   "main": "dist/index.js",
   "scripts": {

packages/util/package.json

@@ -1,13 +1,13 @@
 {
   "name": "@cerc-io/util",
-  "version": "0.2.85",
+  "version": "0.2.86",
   "main": "dist/index.js",
   "license": "AGPL-3.0",
   "dependencies": {
     "@apollo/utils.keyvaluecache": "^1.0.1",
     "@cerc-io/nitro-node": "^0.1.15",
-    "@cerc-io/peer": "^0.2.85",
-    "@cerc-io/solidity-mapper": "^0.2.85",
+    "@cerc-io/peer": "^0.2.86",
+    "@cerc-io/solidity-mapper": "^0.2.86",
     "@cerc-io/ts-channel": "1.0.3-ts-nitro-0.1.1",
     "@ethersproject/properties": "^5.7.0",
     "@ethersproject/providers": "^5.4.4",
@@ -52,7 +52,7 @@
     "yargs": "^17.0.1"
   },
   "devDependencies": {
-    "@cerc-io/cache": "^0.2.85",
+    "@cerc-io/cache": "^0.2.86",
     "@nomiclabs/hardhat-waffle": "^2.0.1",
     "@types/bunyan": "^1.8.8",
     "@types/express": "^4.17.14",