assets/events.worker.js

@@ -6,6 +6,8 @@ const { BigNumber } = require('ethers')
 const { poseidon } = require('@tornado/circomlib')
 const { decrypt } = require('eth-sig-util')
 const { IndexedDB } = require('../services/idb')
+const { BatchEventsService } = require('../services/batch')
+const { getAllCommitments } = require('../services/graph')
 const { sleep } = require('../utilities/helpers')
 const { workerEvents, numbers } = require('../constants/worker')
 const { ExtendedProvider } = require('../services/ether/ExtendedProvider')
@@ -62,11 +64,19 @@ const initWorker = (chainId) => {
 }
 const setTornadoPool = (chainId, provider) => {
   self.poolContract = TornadoPoolFactory.connect(POOL_CONTRACT[chainId], provider)
+
+  self.BatchEventsService = new BatchEventsService({
+    provider,
+    contract: self.poolContract
+  })
 }
 
 const getCommitmentBatch = async ({ blockFrom, blockTo, cachedEvents, withCache }) => {
-  const filter = self.poolContract.filters.NewCommitment()
+  const events = await self.BatchEventsService.getBatchEvents({
-  const events = await self.poolContract.queryFilter(filter, blockFrom, blockTo)
+    fromBlock: blockFrom,
+    toBlock: blockTo,
+    type: 'NewCommitment'
+  })
 
   const commitmentEvents = events.map(({ blockNumber, transactionHash, args }) => ({
     blockNumber,

assets/nullifier.worker.js

@@ -3,6 +3,8 @@ const { isEmpty } = require('lodash')
 const { BigNumber } = require('ethers')
 
 const { IndexedDB } = require('../services/idb')
+const { BatchEventsService } = require('../services/batch')
+const { getAllNullifiers } = require('../services/graph')
 const { sleep } = require('../utilities/helpers')
 const { workerEvents, numbers } = require('../constants/worker')
 const { ExtendedProvider } = require('../services/ether/ExtendedProvider')
@@ -48,6 +50,11 @@ const initWorker = (chainId) => {
 
 const setTornadoPool = (chainId, provider) => {
   self.poolContract = TornadoPoolFactory.connect(POOL_CONTRACT[chainId], provider)
+
+  self.BatchEventsService = new BatchEventsService({
+    provider,
+    contract: self.poolContract
+  })
 }
 
 const saveEvents = async ({ events }) => {
@@ -123,8 +130,10 @@ const getCachedEvents = async () => {
 
 const getNullifiers = async (blockFrom) => {
   try {
-    const filter = self.poolContract.filters.NewNullifier()
+    const events = await self.BatchEventsService.getBatchEvents({
-    const events = await self.poolContract.queryFilter(filter, blockFrom)
+      fromBlock: blockFrom,
+      type: 'NewNullifier'
+    })
 
     return events.map(({ blockNumber, transactionHash, args }) => ({
       blockNumber,

copyFile.ts

@@ -0,0 +1,15 @@
+import { argv } from 'process'
+import { copyFile } from 'fs'
+
+function copyFiles() {
+  const [, , inFile, outFile] = argv
+
+  copyFile(inFile, outFile, function(err) {
+    if (err) {
+      throw err
+    }
+
+    console.log(`Copied ${inFile} to ${outFile}`)
+  })
+}
+copyFiles()

package.json

@@ -10,10 +10,11 @@
     "lint": "eslint --ext .js,.ts",
     "lint:fix": "eslint --ext .js,.ts --quiet --fix",
     "compile": "typechain --target ethers-v5 --out-dir ./_contracts './abi/*.json'",
-    "generate": "nuxt generate && cp dist/404.html dist/ipfs-404.html",
+    "copyFile": "node --loader ts-node/esm copyFile.ts",
+    "generate": "nuxt generate && yarn copyFile dist/404.html dist/ipfs-404.html",
     "prepare": "husky install",
     "ipfs:upload": "node --loader ts-node/esm ipfsUpload.ts",
-    "worker:compile": "nuxt generate && yarn compile:events && yarn compile:nullifier",
+    "worker:compile": "yarn generate && yarn compile:events && yarn compile:nullifier",
     "compile:events": "babel dist/_nuxt/workers/events.worker.js --out-file static/events.worker.js",
     "compile:nullifier": "babel dist/_nuxt/workers/nullifier.worker.js --out-file static/nullifier.worker.js"
   },
@@ -74,7 +75,6 @@
     "eslint-plugin-prettier": "^3.4.0",
     "eslint-plugin-promise": "^5.1.0",
     "eslint-plugin-vue": "^7.16.0",
-    "fibers": "^5.0.0",
     "form-data": "^4.0.0",
     "husky": "^6.0.0",
     "lint-staged": "10.2.11",

services/events/batch.ts

@@ -0,0 +1,109 @@
+import { Provider, Contract, EventLog } from "ethers";
+import { sleep, getBatches } from "@/utilities";
+
+export interface BatchEventServiceConstructor {
+  provider: Provider;
+  contract: Contract;
+  concurrencySize?: number;
+  blocksPerRequest?: number;
+  shouldRetry?: boolean;
+  retryMax?: number;
+  retryOn?: number;
+}
+
+export type EventInput = {
+  fromBlock: number;
+  toBlock: number;
+  type: string;
+};
+
+export class BatchEventsService {
+  provider: Provider;
+  contract: Contract;
+  concurrencySize: number;
+  blocksPerRequest: number;
+  shouldRetry: boolean;
+  retryMax: number;
+  retryOn: number;
+  constructor({
+    provider,
+    contract,
+    concurrencySize = 10,
+    blocksPerRequest = 2000,
+    shouldRetry = true,
+    retryMax = 5,
+    retryOn = 500,
+  }: BatchEventServiceConstructor) {
+    this.provider = provider;
+    this.contract = contract;
+    this.concurrencySize = concurrencySize;
+    this.blocksPerRequest = blocksPerRequest;
+    this.shouldRetry = shouldRetry;
+    this.retryMax = retryMax;
+    this.retryOn = retryOn;
+  }
+
+  async getPastEvents({ fromBlock, toBlock, type }: EventInput): Promise<EventLog[]> {
+    let err;
+    let retries = 0;
+
+    // eslint-disable-next-line no-unmodified-loop-condition
+    while ((!this.shouldRetry && retries === 0) || (this.shouldRetry && retries < this.retryMax)) {
+      try {
+        return (await this.contract.queryFilter(type, fromBlock, toBlock)) as EventLog[];
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      } catch (e: any) {
+        err = e;
+        retries++;
+
+        // If provider.getBlockNumber returned last block that isn't accepted (happened on Avalanche/Gnosis),
+        // get events to last accepted block
+        if (e.message.includes('after last accepted block')) {
+          const acceptedBlock = parseInt(e.message.split('after last accepted block ')[1]);
+          toBlock = acceptedBlock;
+        }
+
+        // retry on 0.5 seconds
+        await sleep(this.retryOn);
+      }
+    }
+
+    throw err;
+  }
+
+  createBatchRequest(batchArray: EventInput[]): Promise<EventLog[]>[] {
+    return batchArray.map(async (event: EventInput, index: number) => {
+      await sleep(20 * index);
+
+      return this.getPastEvents(event);
+    });
+  }
+
+  async getBatchEvents({ fromBlock, toBlock, type = '*' }: EventInput): Promise<EventLog[]> {
+    if (!toBlock) {
+      toBlock = await this.provider.getBlockNumber();
+    }
+
+    const eventsToSync: EventInput[] = [];
+
+    for (let i = fromBlock; i < toBlock; i += this.blocksPerRequest) {
+      const j = i + this.blocksPerRequest - 1 > toBlock ? toBlock : i + this.blocksPerRequest - 1;
+
+      eventsToSync.push({ fromBlock: i, toBlock: j, type } as EventInput);
+    }
+
+    const events = [];
+    const eventChunk = getBatches<EventInput>(eventsToSync, this.concurrencySize);
+
+    let chunkCount = 0;
+
+    for (const chunk of eventChunk) {
+      chunkCount++;
+
+      const fetchedEvents = (await Promise.all(this.createBatchRequest(chunk))).flat();
+      events.push(...fetchedEvents);
+    }
+
+    return events;
+  }
+}

services/events/index.ts

@@ -8,6 +8,8 @@ import { getBridgeHelper, getBridgeProxy, getAmbBridge } from '@/contracts'
 
 import { EventsClass, GetAffirmationParams, GetRelayedMessageParams, SaveEventsParams } from './@types'
 
+export * from './batch'
+
 class EventAggregator implements EventsClass {
   public async getBackupedAddressFromPublicKey(publicKey: string) {
     try {

services/graph/@types/index.ts

@@ -12,3 +12,21 @@ export type Account = {
 }
 
 export type Accounts = Account[]
+
+export type Commitment = {
+  index: string
+  commitment: string
+  blockNumber: string
+  encryptedOutput: string
+  transactionHash: string
+}
+
+export type Commitments = Commitment[]
+
+export type Nullifier = {
+  nullifier: string
+  blockNumber: string
+  transactionHash: string
+}
+
+export type Nullifiers = Nullifier[]

services/graph/index.ts

@@ -5,8 +5,8 @@ import { ChainId } from '@/types'
 import { numbers } from '@/constants'
 import { isEmpty, toChecksumAddress } from '@/utilities'
 
-import { Params, Accounts } from './@types'
+import { Params, Accounts, Commitments, Nullifiers } from './@types'
-import { _META, GET_ACCOUNTS, GET_REGISTERED } from './queries'
+import { _META, GET_ACCOUNTS, GET_REGISTERED, GET_COMMITMENT, GET_NULLIFIER } from './queries'
 
 const first = 1000
 const breakLength = 900
@@ -169,3 +169,164 @@ async function getMeta({ chainId }: Params) {
     return undefined
   }
 }
+
+
+export async function getCommitments({ fromBlock, chainId }: Params): Promise<{
+  results: Commitments,
+  lastSyncBlock: number
+}> {
+  const { data } = await client.query({
+    context: {
+      chainId,
+    },
+    query: gql(GET_COMMITMENT),
+    variables: { first, fromBlock },
+  })
+
+  if (!data) {
+    return {
+      results: [],
+      lastSyncBlock: data._meta.block.number
+    }
+  }
+
+  return {
+    results: data.commitments,
+    lastSyncBlock: data._meta.block.number
+  }
+}
+
+export async function getAllCommitments({ fromBlock, chainId }: Params) {
+  try {
+    let commitments: Commitments = []
+    let lastSyncBlock
+
+    while (true) {
+      let { results, lastSyncBlock: lastBlock } = await getCommitments({ fromBlock, chainId })
+
+      lastSyncBlock = lastBlock
+
+      if (isEmpty(results)) {
+        break
+      }
+
+      if (results.length < breakLength) {
+        commitments = commitments.concat(results)
+        break
+      }
+
+      const [lastEvent] = results.slice(-numbers.ONE)
+
+      results = results.filter((e) => e.blockNumber !== lastEvent.blockNumber)
+      fromBlock = Number(lastEvent.blockNumber)
+
+      commitments = commitments.concat(results)
+    }
+
+    if (!commitments) {
+      return {
+        lastSyncBlock,
+        events: [],
+      }
+    }
+
+    const data = commitments.map((e) => ({
+      index: Number(e.index),
+      commitment: e.commitment,
+      blockNumber: Number(e.blockNumber),
+      encryptedOutput: e.encryptedOutput,
+      transactionHash: e.transactionHash
+    }))
+
+    const [lastEvent] = data.slice(-numbers.ONE)
+
+    return {
+      events: data,
+      lastSyncBlock: lastEvent?.blockNumber > lastSyncBlock ? lastEvent.blockNumber + numbers.ONE : lastSyncBlock,
+    }
+  } catch {
+    return {
+      lastSyncBlock: '',
+      events: [],
+    }
+  }
+}
+
+export async function getNullifiers({ fromBlock, chainId }: Params): Promise<{
+  results: Nullifiers,
+  lastSyncBlock: number
+}> {
+  const { data } = await client.query({
+    context: {
+      chainId,
+    },
+    query: gql(GET_NULLIFIER),
+    variables: { first, fromBlock },
+  })
+
+  if (!data) {
+    return {
+      results: [],
+      lastSyncBlock: data._meta.block.number
+    }
+  }
+
+  return {
+    results: data.commitments,
+    lastSyncBlock: data._meta.block.number
+  }
+}
+
+export async function getAllNullifiers({ fromBlock, chainId }: Params) {
+  try {
+    let nullifiers: Nullifiers = []
+    let lastSyncBlock
+
+    while (true) {
+      let { results, lastSyncBlock: lastBlock } = await getNullifiers({ fromBlock, chainId })
+
+      lastSyncBlock = lastBlock
+
+      if (isEmpty(results)) {
+        break
+      }
+
+      if (results.length < breakLength) {
+        nullifiers = nullifiers.concat(results)
+        break
+      }
+
+      const [lastEvent] = results.slice(-numbers.ONE)
+
+      results = results.filter((e) => e.blockNumber !== lastEvent.blockNumber)
+      fromBlock = Number(lastEvent.blockNumber)
+
+      nullifiers = nullifiers.concat(results)
+    }
+
+    if (!nullifiers) {
+      return {
+        lastSyncBlock,
+        events: [],
+      }
+    }
+
+    const data = nullifiers.map((e) => ({
+      nullifier: e.nullifier,
+      blockNumber: Number(e.blockNumber),
+      transactionHash: e.transactionHash
+    }))
+
+    const [lastEvent] = data.slice(-numbers.ONE)
+
+    return {
+      events: data,
+      lastSyncBlock: lastEvent?.blockNumber > lastSyncBlock ? lastEvent.blockNumber + numbers.ONE : lastSyncBlock,
+    }
+  } catch {
+    return {
+      lastSyncBlock: '',
+      events: [],
+    }
+  }
+}

services/graph/queries.ts

@@ -33,3 +33,41 @@ export const GET_REGISTERED = `
     }
   }
 `
+
+export const GET_COMMITMENT = `
+  query getCommitment($first: Int, $fromBlock: Int) {
+    commitments(first: $first, orderBy: blockNumber, orderDirection: asc, where: {
+      blockNumber_gte: $fromBlock
+    }) {
+      index
+      commitment
+      blockNumber
+      encryptedOutput
+      transactionHash
+    }
+    _meta {
+      block {
+        number
+      }
+      hasIndexingErrors
+    }
+  }
+`
+
+export const GET_NULLIFIER = `
+  query getNullifier($first: Int, $fromBlock: Int) {
+    nullifiers(first: $first, orderBy: blockNumber, orderDirection: asc, where: {
+      blockNumber_gte: $fromBlock
+    }) {
+      nullifier
+      blockNumber
+      transactionHash
+    }
+    _meta {
+      block {
+        number
+      }
+      hasIndexingErrors
+    }
+  }
+`

yarn.lock

@@ -5108,11 +5108,6 @@ detect-indent@^5.0.0:
   resolved "https://registry.yarnpkg.com/detect-indent/-/detect-indent-5.0.0.tgz#3871cc0a6a002e8c3e5b3cf7f336264675f06b9d"
   integrity "sha1-OHHMCmoALow+Wzz38zYmRnXwa50= sha512-rlpvsxUtM0PQvy9iZe640/IWwWYyBsTApREbA1pHOpmOUIl9MkP/U4z7vTtg4Oaojvqhxt7sdufnT0EzGaR31g=="
 
-detect-libc@^1.0.3:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
-  integrity "sha1-+hN8S9aY7fVc1c0CrFWfkaTEups= sha512-pGjwhsmsp4kL2RTz08wcOlGN83otlqHeD/Z5T8GXZB+/YcpQ/dgo+lbU8ZsGxV0HIvqqxo9l7mqYwyYMD9bKDg=="
-
 devalue@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/devalue/-/devalue-2.0.1.tgz#5d368f9adc0928e47b77eea53ca60d2f346f9762"
@@ -6299,13 +6294,6 @@ ffwasm@0.0.7:
     big-integer "^1.6.48"
     wasmbuilder "0.0.10"
 
-fibers@^5.0.0:
-  version "5.0.3"
-  resolved "https://registry.yarnpkg.com/fibers/-/fibers-5.0.3.tgz#2fd03acb255db66fe693d15beafbf5ae92193fd7"
-  integrity "sha1-L9A6yyVdtm/mk9Fb6vv1rpIZP9c= sha512-/qYTSoZydQkM21qZpGLDLuCq8c+B8KhuCQ1kLPvnRNhxhVbvrpmH9l2+Lblf5neDuEsY4bfT7LeO553TXQDvJw=="
-  dependencies:
-    detect-libc "^1.0.3"
-
 figgy-pudding@^3.5.1:
   version "3.5.2"
   resolved "https://registry.yarnpkg.com/figgy-pudding/-/figgy-pudding-3.5.2.tgz#b4eee8148abb01dcf1d1ac34367d59e12fa61d6e"