fix: update relayer

-add unique job id
-handle contract errors
-fix queue management

src/constants/variables.ts

@@ -33,3 +33,14 @@ const FIELD_SIZE = BigNumber.from('218882428718392752222464057452572750885483644
 const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000';
 
 export { numbers, NETWORKS_INFO, FIELD_SIZE, BG_ZERO, ZERO_ADDRESS };
+
+export const CONTRACT_ERRORS = [
+  'Invalid merkle root',
+  'Input is already spent',
+  'Incorrect external data hash',
+  'Invalid fee',
+  'Invalid ext amount',
+  'Invalid public amount',
+  'Invalid transaction proof',
+  "Can't withdraw to zero address",
+];

src/modules/api/api.service.ts

@@ -1,10 +1,12 @@
-import { Queue, Job } from 'bull';
+import { Queue } from 'bull';
+import { v4 as uuid } from 'uuid';
 import { InjectQueue } from '@nestjs/bull';
 import { Injectable } from '@nestjs/common';
 
 import { ProviderService } from '@/services';
 import { ConfigService } from '@nestjs/config';
 
+import { Transaction } from '@/types';
 @Injectable()
 class ApiService {
   constructor(
@@ -32,13 +34,24 @@ class ApiService {
   }
 
   async transaction(data: any): Promise<string> {
-    const job = await this.transactionQueue.add(data);
+    const jobId = uuid();
 
-    return String(job.id);
+    await this.transactionQueue.add({ ...data, status: 'QUEUED' }, { jobId });
+
+    return jobId;
   }
 
-  async getJob(id: string): Promise<Job | null> {
-    return await this.transactionQueue.getJob(id);
+  async getJob(id: string): Promise<Transaction | null> {
+    const job = await this.transactionQueue.getJob(id);
+
+    if (!job) {
+      return null;
+    }
+
+    return {
+      ...job.data,
+      failedReason: job.failedReason,
+    };
   }
 
   private async healthCheck(): Promise<Health> {

src/modules/queue/transaction.processor.ts

@@ -1,48 +1,18 @@
-import { Job, Queue } from 'bull';
-import { BigNumber, BigNumberish } from 'ethers';
-import { BytesLike } from '@ethersproject/bytes';
+import { BigNumber } from 'ethers';
 import { TxManager } from 'tx-manager';
+import { Job, Queue, DoneCallback } from 'bull';
 
 import { Injectable } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
-import { InjectQueue, Process, Processor } from '@nestjs/bull';
+import { InjectQueue, Process, Processor, OnQueueActive, OnQueueCompleted, OnQueueFailed } from '@nestjs/bull';
 
-import { numbers } from '@/constants';
+import { numbers, CONTRACT_ERRORS } from '@/constants';
 import { toWei, getToIntegerMultiplier } from '@/utilities';
 import { GasPriceService, ProviderService } from '@/services';
 import txMangerConfig from '@/config/txManager.config';
 
 import { BaseProcessor } from './base.processor';
-import { ChainId } from '@/types';
-
-export type ExtData = {
-  recipient: string;
-  relayer: string;
-  fee: BigNumberish;
-  extAmount: BigNumberish;
-  encryptedOutput1: BytesLike;
-  encryptedOutput2: BytesLike;
-};
-
-export type ArgsProof = {
-  proof: BytesLike;
-  root: BytesLike;
-  newRoot: BytesLike;
-  inputNullifiers: string[];
-  outputCommitments: BytesLike[];
-  outPathIndices: string;
-  publicAmount: string;
-  extDataHash: string;
-};
-
-export interface Transaction {
-  extData: ExtData;
-  args: ArgsProof;
-  txHash: string;
-  status: string;
-  confirmations: number;
-}
-
+import { ChainId, Transaction } from '@/types';
 @Injectable()
 @Processor('transaction')
 export class TransactionProcessor extends BaseProcessor<Transaction> {
@@ -58,19 +28,40 @@ export class TransactionProcessor extends BaseProcessor<Transaction> {
   }
 
   @Process()
-  async processTransactions(job: Job<Transaction>) {
+  async processTransactions(job: Job<Transaction>, cb: DoneCallback) {
     try {
-      await job.isActive();
-
       const { extData } = job.data;
 
       await this.checkFee({ fee: extData.fee, externalAmount: extData.extAmount });
       await this.submitTx(job);
+
+      cb(null);
     } catch (err) {
-      await job.moveToFailed(err, true);
+      cb(err);
     }
   }
 
+  @OnQueueActive()
+  async onActive(job: Job) {
+    job.data.status = 'ACCEPTED';
+
+    await job.update(job.data);
+  }
+
+  @OnQueueCompleted()
+  async onCompleted(job: Job) {
+    job.data.status = 'CONFIRMED';
+
+    await job.update(job.data);
+  }
+
+  @OnQueueFailed()
+  async onFailed(job: Job) {
+    job.data.status = 'FAILED';
+
+    await job.update(job.data);
+  }
+
   async submitTx(job: Job<Transaction>) {
     try {
       const txManager = new TxManager(txMangerConfig());
@@ -97,17 +88,11 @@ export class TransactionProcessor extends BaseProcessor<Transaction> {
           await job.update(job.data);
         });
 
-      if (receipt.status === 1) {
-        await job.isCompleted();
-
-        job.data.status = 'SENT';
-
-        await job.update(job.data);
-      } else {
+      if (receipt.status !== 1) {
         throw new Error('Submitted transaction failed');
       }
-    } catch (e) {
-      throw new Error(`Revert by smart contract ${e.message}`);
+    } catch (err) {
+      return this.handleError(err);
     }
   }
 
@@ -170,4 +155,21 @@ export class TransactionProcessor extends BaseProcessor<Transaction> {
       throw new Error('Provided fee is not enough. Probably it is a Gas Price spike, try to resubmit.');
     }
   }
+
+  handleError(e) {
+    // Sometimes ethers wraps known errors, unwrap it in this case
+    if (e?.error?.error) {
+      e = e.error;
+    }
+
+    const message = e?.error ? e.error.message : e.message;
+
+    const error = CONTRACT_ERRORS.find((e) => (typeof e === 'string' ? e === message : message.match(e)));
+
+    if (error) {
+      throw new Error(`Revert by smart contract: ${error}`);
+    }
+
+    throw new Error('Relayer did not send your transaction. Please choose a different relayer.');
+  }
 }

src/types/index.ts

@@ -1,9 +1,39 @@
-const MAINNET_CHAIN_ID = 1
-const GOERLI_CHAIN_ID = 5
-const OPTIMISM_CHAIN_ID = 69
+import { BigNumberish } from 'ethers';
+import { BytesLike } from '@ethersproject/bytes';
+
+const MAINNET_CHAIN_ID = 1;
+const GOERLI_CHAIN_ID = 5;
+const OPTIMISM_CHAIN_ID = 69;
 
 export enum ChainId {
   MAINNET = MAINNET_CHAIN_ID,
   GOERLI = GOERLI_CHAIN_ID,
   OPTIMISM = OPTIMISM_CHAIN_ID,
 }
+
+export type ExtData = {
+  recipient: string;
+  relayer: string;
+  fee: BigNumberish;
+  extAmount: BigNumberish;
+  encryptedOutput1: BytesLike;
+  encryptedOutput2: BytesLike;
+};
+
+export type ArgsProof = {
+  proof: BytesLike;
+  root: BytesLike;
+  inputNullifiers: string[];
+  outputCommitments: BytesLike[];
+  publicAmount: string;
+  extDataHash: string;
+};
+
+export interface Transaction {
+  extData: ExtData;
+  args: ArgsProof;
+  status: string;
+  txHash?: string;
+  confirmations?: number;
+  failedReason?: string;
+}

yarn.lock

@@ -5871,11 +5871,16 @@ utils-merge@1.0.1:
   resolved "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
   integrity sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=
 
-uuid@8.3.2, uuid@^8.3.0, uuid@^8.3.2:
+uuid@8.3.2, uuid@^8.3.0:
   version "8.3.2"
   resolved "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz#80d5b5ced271bb9af6c445f21a1a04c606cefbe2"
   integrity sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==
 
+uuid@^8.3.2:
+  version "8.3.2"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-8.3.2.tgz#80d5b5ced271bb9af6c445f21a1a04c606cefbe2"
+  integrity sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==
+
 v8-compile-cache@^2.0.3:
   version "2.3.0"
   resolved "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.3.0.tgz#2de19618c66dc247dcfb6f99338035d8245a2cee"