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-rw-r--r--packages/subproviders/src/globals.d.ts21
-rw-r--r--packages/subproviders/src/index.ts1
-rw-r--r--packages/subproviders/src/subproviders/nonce_tracker.ts112
-rw-r--r--packages/subproviders/test/unit/nonce_tracker_subprovider_test.ts195
4 files changed, 329 insertions, 0 deletions
diff --git a/packages/subproviders/src/globals.d.ts b/packages/subproviders/src/globals.d.ts
index 53457fa24..595bae89e 100644
--- a/packages/subproviders/src/globals.d.ts
+++ b/packages/subproviders/src/globals.d.ts
@@ -1,3 +1,4 @@
+
declare module 'dirty-chai';
declare module 'es6-promisify';
@@ -13,7 +14,9 @@ declare module 'ethereumjs-tx' {
public r: Buffer;
public s: Buffer;
public v: Buffer;
+ public nonce: Buffer;
public serialize(): Buffer;
+ public getSenderAddress(): Buffer;
constructor(txParams: any);
}
export = EthereumTx;
@@ -97,6 +100,24 @@ declare module 'web3-provider-engine' {
}
export = Web3ProviderEngine;
}
+declare module 'web3-provider-engine/util/rpc-cache-utils' {
+ class ProviderEngineRpcUtils {
+ public static blockTagForPayload(payload: any): string|null;
+ }
+ export = ProviderEngineRpcUtils;
+}
+declare module 'web3-provider-engine/subproviders/fixture' {
+ import * as Web3 from 'web3';
+ class FixtureSubprovider {
+ constructor(staticResponses: any);
+ public handleRequest(
+ payload: Web3.JSONRPCRequestPayload,
+ next: () => void,
+ end: (err: Error | null, data?: any) => void,
+ ): void;
+ }
+ export = FixtureSubprovider;
+}
// hdkey declarations
declare module 'hdkey' {
diff --git a/packages/subproviders/src/index.ts b/packages/subproviders/src/index.ts
index 720c4362f..4b3be4efd 100644
--- a/packages/subproviders/src/index.ts
+++ b/packages/subproviders/src/index.ts
@@ -9,6 +9,7 @@ import { LedgerEthereumClient } from './types';
export { InjectedWeb3Subprovider } from './subproviders/injected_web3';
export { RedundantRPCSubprovider } from './subproviders/redundant_rpc';
export { LedgerSubprovider } from './subproviders/ledger';
+export { NonceTrackerSubprovider } from './subproviders/nonce_tracker';
export { ECSignature, LedgerWalletSubprovider, LedgerCommunicationClient } from './types';
/**
diff --git a/packages/subproviders/src/subproviders/nonce_tracker.ts b/packages/subproviders/src/subproviders/nonce_tracker.ts
new file mode 100644
index 000000000..540a91771
--- /dev/null
+++ b/packages/subproviders/src/subproviders/nonce_tracker.ts
@@ -0,0 +1,112 @@
+import { promisify } from '@0xproject/utils';
+import * as _ from 'lodash';
+
+import EthereumTx = require('ethereumjs-tx');
+import ethUtil = require('ethereumjs-util');
+import providerEngineUtils = require('web3-provider-engine/util/rpc-cache-utils');
+
+import { JSONRPCPayload } from '../types';
+
+import { Subprovider } from './subprovider';
+
+const NONCE_TOO_LOW_ERROR_MESSAGE = 'Transaction nonce is too low';
+
+export class NonceTrackerSubprovider extends Subprovider {
+ private _nonceCache: { [address: string]: string } = {};
+ private static _reconstructTransaction(payload: JSONRPCPayload): EthereumTx {
+ const raw = payload.params[0];
+ const transactionData = ethUtil.stripHexPrefix(raw);
+ const rawData = new Buffer(transactionData, 'hex');
+ return new EthereumTx(rawData);
+ }
+ private static _determineAddress(payload: JSONRPCPayload): string {
+ switch (payload.method) {
+ case 'eth_getTransactionCount':
+ return payload.params[0].toLowerCase();
+ case 'eth_sendRawTransaction':
+ const transaction = NonceTrackerSubprovider._reconstructTransaction(payload);
+ return `0x${transaction.getSenderAddress().toString('hex')}`.toLowerCase();
+ default:
+ throw new Error('Invalid Method');
+ }
+ }
+ constructor() {
+ super();
+ }
+ // tslint:disable-next-line:async-suffix
+ public async handleRequest(
+ payload: JSONRPCPayload,
+ next: (callback?: (err: Error | null, result: any, cb: any) => void) => void,
+ end: (err: Error | null, data?: any) => void,
+ ): Promise<void> {
+ switch (payload.method) {
+ case 'eth_getTransactionCount':
+ const blockTag = providerEngineUtils.blockTagForPayload(payload);
+ if (!_.isNull(blockTag) && blockTag === 'pending') {
+ const address = NonceTrackerSubprovider._determineAddress(payload);
+ const cachedResult = this._nonceCache[address];
+ if (cachedResult) {
+ end(null, cachedResult);
+ return;
+ } else {
+ next((requestError: Error | null, requestResult: any, cb: any) => {
+ if (_.isNull(requestError)) {
+ this._nonceCache[address] = requestResult as string;
+ }
+ cb();
+ return;
+ });
+ return;
+ }
+ } else {
+ next();
+ return;
+ }
+ case 'eth_sendRawTransaction':
+ return next(async (sendTransactionError: Error | null, txResult: any, cb: any) => {
+ if (_.isNull(sendTransactionError)) {
+ this._handleSuccessfulTransaction(payload);
+ } else {
+ await this._handleSendTransactionErrorAsync(payload, sendTransactionError);
+ }
+ cb();
+ });
+ default:
+ return next();
+ }
+ }
+ private _handleSuccessfulTransaction(payload: JSONRPCPayload): void {
+ const address = NonceTrackerSubprovider._determineAddress(payload);
+ const transaction = NonceTrackerSubprovider._reconstructTransaction(payload);
+ // Increment the nonce from the previous successfully submitted transaction
+ let nonce = ethUtil.bufferToInt(transaction.nonce);
+ nonce++;
+ let nextHexNonce = nonce.toString(16);
+ if (nextHexNonce.length % 2) {
+ nextHexNonce = `0${nextHexNonce}`;
+ }
+ nextHexNonce = `0x${nextHexNonce}`;
+ this._nonceCache[address] = nextHexNonce;
+ }
+ private async _handleSendTransactionErrorAsync(payload: JSONRPCPayload, err: Error): Promise<void> {
+ const address = NonceTrackerSubprovider._determineAddress(payload);
+ if (this._nonceCache[address]) {
+ if (_.includes(err.message, NONCE_TOO_LOW_ERROR_MESSAGE)) {
+ await this._handleNonceTooLowErrorAsync(address);
+ }
+ }
+ }
+ private async _handleNonceTooLowErrorAsync(address: string): Promise<void> {
+ const oldNonceInt = ethUtil.bufferToInt(new Buffer(this._nonceCache[address], 'hex'));
+ delete this._nonceCache[address];
+ const nonceResult = await this.emitPayloadAsync({
+ method: 'eth_getTransactionCount',
+ params: [address, 'pending'],
+ });
+ const nonce = nonceResult.result;
+ const latestNonceInt = ethUtil.bufferToInt(new Buffer(nonce, 'hex'));
+ if (latestNonceInt > oldNonceInt) {
+ this._nonceCache[address] = nonce;
+ }
+ }
+}
diff --git a/packages/subproviders/test/unit/nonce_tracker_subprovider_test.ts b/packages/subproviders/test/unit/nonce_tracker_subprovider_test.ts
new file mode 100644
index 000000000..a99f1f9fb
--- /dev/null
+++ b/packages/subproviders/test/unit/nonce_tracker_subprovider_test.ts
@@ -0,0 +1,195 @@
+import * as chai from 'chai';
+import * as _ from 'lodash';
+import Web3 = require('web3');
+import Web3ProviderEngine = require('web3-provider-engine');
+import FixtureSubprovider = require('web3-provider-engine/subproviders/fixture');
+
+import promisify = require('es6-promisify');
+import EthereumTx = require('ethereumjs-tx');
+
+import { NonceTrackerSubprovider } from '../../src';
+import { DoneCallback } from '../../src/types';
+import { chaiSetup } from '../chai_setup';
+import { reportCallbackErrors } from '../utils/report_callback_errors';
+
+import { Subprovider } from '../../src/subproviders/subprovider';
+
+const expect = chai.expect;
+chaiSetup.configure();
+
+describe('NonceTrackerSubprovider', () => {
+ let provider: Web3ProviderEngine;
+ it('successfully caches the transaction count', async () => {
+ provider = new Web3ProviderEngine();
+ let called = false;
+ const nonceTrackerSubprovider = new NonceTrackerSubprovider();
+ provider.addProvider(nonceTrackerSubprovider);
+ provider.addProvider(new FixtureSubprovider({
+ 'eth_getBlockByNumber': '0x01',
+ 'eth_getTransactionCount': (data: any, next: any, end: any) => {
+ if (called) {
+ return end(null, '0x99');
+ } else {
+ called = true;
+ end(null, '0x01');
+ }
+ },
+ }));
+ provider.start();
+
+ const payload = {
+ jsonrpc: '2.0',
+ method: 'eth_getTransactionCount',
+ params: ['0x0', 'pending'],
+ id: 1,
+ };
+
+ const response = await promisify(provider.sendAsync, provider)(payload);
+ expect(response.result).to.be.eq('0x01');
+ const secondResponse = await promisify(provider.sendAsync, provider)(payload);
+ expect(secondResponse.result).to.be.eq('0x01');
+ });
+ it('does not cache the result for latest transaction count', async () => {
+ provider = new Web3ProviderEngine();
+ let called = false;
+ const nonceTrackerSubprovider = new NonceTrackerSubprovider();
+ provider.addProvider(nonceTrackerSubprovider);
+ provider.addProvider(new FixtureSubprovider({
+ 'eth_getBlockByNumber': '0x01',
+ 'eth_getTransactionCount': (data: any, next: any, end: any) => {
+ if (called) {
+ return end(null, '0x99');
+ } else {
+ called = true;
+ end(null, '0x01');
+ }
+ },
+ }));
+ provider.start();
+
+ const payload = {
+ jsonrpc: '2.0',
+ method: 'eth_getTransactionCount',
+ params: ['0x0', 'latest'],
+ id: 1,
+ };
+
+ const response = await promisify(provider.sendAsync, provider)(payload);
+ expect(response.result).to.be.eq('0x01');
+ const secondResponse = await promisify(provider.sendAsync, provider)(payload);
+ expect(secondResponse.result).to.be.eq('0x99');
+ });
+ it('clears the cache on a Nonce Too Low Error', async () => {
+ provider = new Web3ProviderEngine();
+ let called = false;
+ const nonceTrackerSubprovider = new NonceTrackerSubprovider();
+ provider.addProvider(nonceTrackerSubprovider);
+ provider.addProvider(new FixtureSubprovider({
+ 'eth_getBlockByNumber': '0x01',
+ 'eth_getTransactionCount': (data: any, next: any, end: any) => {
+ if (called) {
+ return end(null, '0x99');
+ } else {
+ called = true;
+ end(null, '0x01');
+ }
+ },
+ 'eth_sendRawTransaction': (data: any, next: any, end: any) => {
+ end(new Error('Transaction nonce is too low'));
+ },
+ }));
+ provider.start();
+
+ const noncePayload = {
+ jsonrpc: '2.0',
+ method: 'eth_getTransactionCount',
+ params: ['0x1f36f546477cda21bf2296c50976f2740247906f', 'pending'],
+ id: 1,
+ };
+ const txParams = [
+ '0x',
+ '0x09184e72a000',
+ '0x2710',
+ '0x0000000000000000000000000000000000000000',
+ '0x',
+ '0x7f7465737432000000000000000000000000000000000000000000000000000000600057',
+ '0x1c',
+ '0x5e1d3a76fbf824220eafc8c79ad578ad2b67d01b0c2425eb1f1347e8f50882ab',
+ '0x5bd428537f05f9830e93792f90ea6a3e2d1ee84952dd96edbae9f658f831ab13'
+ ];
+
+ const transaction = new EthereumTx(txParams);
+ const txPayload = {
+ jsonrpc: '2.0',
+ method: 'eth_sendRawTransaction',
+ params: [transaction.serialize()],
+ id: 1,
+ };
+
+ const response = await promisify(provider.sendAsync, provider)(noncePayload);
+ expect(response.result).to.be.eq('0x01');
+ const secondResponse = await promisify(provider.sendAsync, provider)(noncePayload);
+ expect(secondResponse.result).to.be.eq('0x01');
+ try {
+ const txResponse = await promisify(provider.sendAsync, provider)(txPayload);
+ } catch (err) {
+ const thirdResponse = await promisify(provider.sendAsync, provider)(noncePayload);
+ expect(thirdResponse.result).to.be.eq('0x99');
+ }
+ });
+ it('increments the used nonce', async () => {
+ provider = new Web3ProviderEngine();
+ let called = false;
+ const nonceTrackerSubprovider = new NonceTrackerSubprovider();
+ provider.addProvider(nonceTrackerSubprovider);
+ provider.addProvider(new FixtureSubprovider({
+ 'eth_getBlockByNumber': '0x01',
+ 'eth_getTransactionCount': (data: any, next: any, end: any) => {
+ if (called) {
+ return end(null, '0x99');
+ } else {
+ called = true;
+ end(null, '0x00');
+ }
+ },
+ 'eth_sendRawTransaction': (data: any, next: any, end: any) => {
+ end(null);
+ },
+ }));
+ provider.start();
+
+ const noncePayload = {
+ jsonrpc: '2.0',
+ method: 'eth_getTransactionCount',
+ params: ['0x1f36f546477cda21bf2296c50976f2740247906f', 'pending'],
+ id: 1,
+ };
+ const txParams = [
+ '0x',
+ '0x09184e72a000',
+ '0x2710',
+ '0x0000000000000000000000000000000000000000',
+ '0x',
+ '0x7f7465737432000000000000000000000000000000000000000000000000000000600057',
+ '0x1c',
+ '0x5e1d3a76fbf824220eafc8c79ad578ad2b67d01b0c2425eb1f1347e8f50882ab',
+ '0x5bd428537f05f9830e93792f90ea6a3e2d1ee84952dd96edbae9f658f831ab13'
+ ];
+
+ const transaction = new EthereumTx(txParams);
+ const txPayload = {
+ jsonrpc: '2.0',
+ method: 'eth_sendRawTransaction',
+ params: [transaction.serialize()],
+ id: 1,
+ };
+
+ const response = await promisify(provider.sendAsync, provider)(noncePayload);
+ expect(response.result).to.be.eq('0x00');
+ const secondResponse = await promisify(provider.sendAsync, provider)(noncePayload);
+ expect(secondResponse.result).to.be.eq('0x00');
+ const txResponse = await promisify(provider.sendAsync, provider)(txPayload);
+ const thirdResponse = await promisify(provider.sendAsync, provider)(noncePayload);
+ expect(thirdResponse.result).to.be.eq('0x01');
+ });
+});
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