Basic GQL API to get traces, save to db. (#76)

packages/address-watcher/environments/local.toml

@@ -24,6 +24,7 @@
 [upstream]
   gqlEndpoint = "http://127.0.0.1:8083/graphql"
   gqlSubscriptionEndpoint = "http://127.0.0.1:5000/graphql"
+  traceProviderEndpoint = "http://127.0.0.1:8545"
 
   [upstream.cache]
     name = "requests"

packages/address-watcher/package.json

@@ -5,7 +5,6 @@
   "private": true,
   "scripts": {
     "server": "DEBUG=vulcanize:* nodemon src/server.ts -f environments/local.toml",
-    "server:mock": "MOCK=1 nodemon src/server.ts -f environments/local.toml",
     "test": "mocha -r ts-node/register src/**/*.spec.ts",
     "lint": "eslint .",
     "build": "tsc"
@@ -26,6 +25,7 @@
     "@vulcanize/cache": "^0.1.0",
     "@vulcanize/ipld-eth-client": "^0.1.0",
     "@vulcanize/solidity-mapper": "^0.1.0",
+    "@vulcanize/tracing-client": "^0.1.0",
     "apollo-server-express": "^2.25.0",
     "apollo-type-bigint": "^0.1.3",
     "debug": "^4.3.1",

packages/address-watcher/src/config.ts

@@ -17,6 +17,7 @@ export interface Config {
   upstream: {
     gqlEndpoint: string;
     gqlSubscriptionEndpoint: string;
+    traceProviderEndpoint: string;
     cache: CacheConfig
   }
 }

packages/address-watcher/src/database.ts

@@ -1,8 +1,9 @@
 import assert from 'assert';
-import { Connection, ConnectionOptions, createConnection } from 'typeorm';
+import { Connection, ConnectionOptions, createConnection, DeepPartial } from 'typeorm';
 import { SnakeNamingStrategy } from 'typeorm-naming-strategies';
 
 import { Address } from './entity/Address';
+import { Trace } from './entity/Trace';
 
 export class Database {
   _config: ConnectionOptions
@@ -50,4 +51,17 @@ export class Database {
       }
     });
   }
+
+  async getTrace (txHash: string): Promise<Trace | undefined> {
+    return this._conn.getRepository(Trace)
+      .createQueryBuilder('trace')
+      .where('tx_hash = :txHash', { txHash })
+      .getOne();
+  }
+
+  async saveTrace ({ txHash, blockNumber, blockHash, trace }: DeepPartial<Trace>): Promise<Trace> {
+    const repo = this._conn.getRepository(Trace);
+    const entity = repo.create({ txHash, blockNumber, blockHash, trace });
+    return repo.save(entity);
+  }
 }

packages/address-watcher/src/entity/Trace.ts

@@ -0,0 +1,20 @@
+import { Entity, PrimaryGeneratedColumn, Column, Index } from 'typeorm';
+
+@Entity()
+@Index(['txHash'], { unique: true })
+export class Trace {
+  @PrimaryGeneratedColumn()
+  id!: number;
+
+  @Column('varchar', { length: 66 })
+  txHash!: string;
+
+  @Column('numeric')
+  blockNumber!: number;
+
+  @Column('varchar', { length: 66 })
+  blockHash!: string;
+
+  @Column('text')
+  trace!: string;
+}

packages/address-watcher/src/indexer.ts

@@ -1,30 +1,34 @@
 import assert from 'assert';
-// import debug from 'debug';
+import debug from 'debug';
 import { ethers } from 'ethers';
 import { PubSub } from 'apollo-server-express';
 
 import { EthClient } from '@vulcanize/ipld-eth-client';
 import { GetStorageAt } from '@vulcanize/solidity-mapper';
+import { TracingClient } from '@vulcanize/tracing-client';
 
 import { Database } from './database';
 
-// const log = debug('vulcanize:indexer');
+const log = debug('vulcanize:indexer');
 
 export class Indexer {
   _db: Database
   _ethClient: EthClient
   _pubsub: PubSub
   _getStorageAt: GetStorageAt
+  _tracingClient: TracingClient
 
-  constructor (db: Database, ethClient: EthClient, pubsub: PubSub) {
+  constructor (db: Database, ethClient: EthClient, pubsub: PubSub, tracingClient: TracingClient) {
     assert(db);
     assert(ethClient);
     assert(pubsub);
+    assert(tracingClient);
 
     this._db = db;
     this._ethClient = ethClient;
     this._pubsub = pubsub;
     this._getStorageAt = this._ethClient.getStorageAt.bind(this._ethClient);
+    this._tracingClient = tracingClient;
   }
 
   getEventIterator (): AsyncIterator<any> {
@@ -43,4 +47,30 @@ export class Indexer {
 
     return true;
   }
+
+  async traceTx (txHash: string): Promise<any> {
+    let entity = await this._db.getTrace(txHash);
+    if (entity) {
+      log('traceTx: db hit');
+    } else {
+      log('traceTx: db miss, fetching from tracing API server');
+
+      const tx = await this._tracingClient.getTx(txHash);
+      const trace = await this._tracingClient.getTxTrace(txHash, 'callTraceWithAddresses', '15s');
+
+      entity = await this._db.saveTrace({
+        txHash,
+        blockNumber: tx.blockNumber,
+        blockHash: tx.blockHash,
+        trace: JSON.stringify(trace)
+      });
+    }
+
+    return {
+      txHash,
+      blockNumber: entity.blockNumber,
+      blockHash: entity.blockHash,
+      trace: entity.trace
+    };
+  }
 }

packages/address-watcher/src/resolvers.ts

@@ -22,6 +22,11 @@ export const createResolvers = async (indexer: Indexer): Promise<any> => {
       }
     },
 
-    Query: {}
+    Query: {
+      traceTx: async (_: any, { txHash }: { txHash: string }): Promise<any> => {
+        log('traceTx', txHash);
+        return indexer.traceTx(txHash);
+      }
+    }
   };
 };

packages/address-watcher/src/schema.ts

@@ -3,11 +3,17 @@ import { gql } from '@apollo/client/core';
 export default gql`
 # Types
 
-# Watched event, include additional context over and above the event data.
+type TxTrace {
-type WatchedEvent {
-  blockHash: String!
   txHash: String!
+  blockNumber: Int!
+  blockHash: String!
+  trace: String!
+}
+
+# Watched address event, include additional context over and above the event data.
+type WatchedAddressEvent {
   address: String!
+  txTrace: TxTrace!
 }
 
 #
@@ -16,10 +22,23 @@ type WatchedEvent {
 
 type Query {
 
-  queryAppearances(
+  #
+  # Developer API methods
+  #
+
+  appearances(
     address: String!
+    fromBlockNumber: Int!
+    toBlockNumber: Int!
+  ): [TxTrace!]
+
+  #
+  # Low level utility methods
+  #
+
+  traceTx(
     txHash: String!
-  ): [String!]
+  ): TxTrace
 }
 
 #
@@ -28,7 +47,7 @@ type Query {
 type Subscription {
 
   # Watch for token events (at head of chain).
-  onAddressEvent: WatchedEvent!
+  onAddressEvent: WatchedAddressEvent!
 }
 
 #

packages/address-watcher/src/server.ts

@@ -10,6 +10,7 @@ import { createServer } from 'http';
 
 import { getCache } from '@vulcanize/cache';
 import { EthClient } from '@vulcanize/ipld-eth-client';
+import { TracingClient } from '@vulcanize/tracing-client';
 
 import typeDefs from './schema';
 
@@ -44,18 +45,21 @@ export const main = async (): Promise<any> => {
   await db.init();
 
   assert(upstream, 'Missing upstream config');
-  const { gqlEndpoint, gqlSubscriptionEndpoint, cache: cacheConfig } = upstream;
+  const { gqlEndpoint, gqlSubscriptionEndpoint, traceProviderEndpoint, cache: cacheConfig } = upstream;
   assert(gqlEndpoint, 'Missing upstream gqlEndpoint');
   assert(gqlSubscriptionEndpoint, 'Missing upstream gqlSubscriptionEndpoint');
+  assert(traceProviderEndpoint, 'Missing upstream traceProviderEndpoint');
 
   const cache = await getCache(cacheConfig);
 
   const ethClient = new EthClient({ gqlEndpoint, gqlSubscriptionEndpoint, cache });
 
+  const tracingClient = new TracingClient(traceProviderEndpoint);
+
   // Note: In-memory pubsub works fine for now, as each watcher is a single process anyway.
   // Later: https://www.apollographql.com/docs/apollo-server/data/subscriptions/#production-pubsub-libraries
   const pubsub = new PubSub();
-  const indexer = new Indexer(db, ethClient, pubsub);
+  const indexer = new Indexer(db, ethClient, pubsub, tracingClient);
 
   const resolvers = await createResolvers(indexer);
 

packages/tracing-client/index.ts

@@ -0,0 +1 @@
+export * from './src/tracing';

packages/tracing-client/src/cli/get-call-trace.ts

@@ -1,7 +1,7 @@
 import fs from 'fs';
 import yargs from 'yargs';
 
-import { getCallTrace } from '../tracing';
+import { TracingClient } from '../tracing';
 
 (async () => {
   const argv = await yargs.parserConfiguration({
@@ -45,7 +45,8 @@ import { getCallTrace } from '../tracing';
 
   const txData = JSON.parse(fs.readFileSync(argv.txFile).toString("utf-8"));
 
-  const result = await getCallTrace(argv.providerUrl, argv.block, txData, tracer);
+  const tracingClient = new TracingClient(argv.providerUrl);
+  const result = await tracingClient.getCallTrace(argv.block, txData, tracer);
 
   console.log(JSON.stringify(result, null, 2));
 })();

packages/tracing-client/src/cli/get-tx-trace.ts

@@ -1,7 +1,7 @@
 import fs from 'fs';
 import yargs from 'yargs';
 
-import { getTxTrace } from '../tracing';
+import { TracingClient } from '../tracing';
 
 (async () => {
   const argv = await yargs.parserConfiguration({
@@ -42,7 +42,8 @@ import { getTxTrace } from '../tracing';
     tracer = fs.readFileSync(tracerFile).toString("utf-8");
   }
 
-  const result = await getTxTrace(argv.providerUrl, argv.txHash, tracer, argv.timeout);
+  const tracingClient = new TracingClient(argv.providerUrl);
+  const result = await tracingClient.getTxTrace(argv.txHash, tracer, argv.timeout);
 
   console.log(JSON.stringify(result, null, 2));
 })();

packages/tracing-client/src/tracing.ts

@@ -1,11 +1,35 @@
+import assert from 'assert';
+import path from 'path';
+import fs from 'fs';
 import { ethers } from 'ethers';
 
-export const getTxTrace = async (providerUrl: string, txHash: string, tracer: string | undefined, timeout: string | undefined): Promise<any> => {
+const callTracerWithAddresses = fs.readFileSync(path.join(__dirname, 'tracers', 'call_address_tracer.js')).toString("utf-8");
-  const provider = new ethers.providers.JsonRpcProvider(providerUrl);
-  return provider.send('debug_traceTransaction', [txHash, { tracer, timeout }]);
-};
 
-export const getCallTrace = async (providerUrl: string, block: string, txData: any, tracer: string | undefined): Promise<any> => {
+export class TracingClient {
-  const provider = new ethers.providers.JsonRpcProvider(providerUrl);
+
-  return provider.send('debug_traceCall', [ txData, block, { tracer }]);
+  _providerUrl: string;
-};
+  _provider: ethers.providers.JsonRpcProvider;
+
+  constructor(providerUrl: string) {
+    assert(providerUrl);
+
+    this._providerUrl = providerUrl;
+    this._provider = new ethers.providers.JsonRpcProvider(providerUrl);
+  }
+
+  async getTx (txHash: string): Promise<ethers.providers.TransactionResponse> {
+    return this._provider.getTransaction(txHash);
+  }
+
+  async getTxTrace (txHash: string, tracer: string | undefined, timeout: string | undefined): Promise<any> {
+    if (tracer === 'callTraceWithAddresses') {
+      tracer = callTracerWithAddresses;
+    }
+
+    return this._provider.send('debug_traceTransaction', [txHash, { tracer, timeout }]);
+  };
+
+  async getCallTrace (block: string, txData: any, tracer: string | undefined): Promise<any> {
+    return this._provider.send('debug_traceCall', [ txData, block, { tracer }]);
+  };
+}