Merge pull request #290 from Permissionless-Software-Foundation/ct-unstable

fix(sendRawTransaction): Adding retry logic

README.md

@@ -7,21 +7,16 @@
 
 [bch-js](https://www.npmjs.com/package/@psf/bch-js) is a JavaScript npm library for creating web and mobile apps that can interact with the Bitcoin Cash (BCH) blockchain. bch-js contains a toolbox of handy tools, and an easy API for talking with [psf-bch-api REST API](https://github.com/Permissionless-Software-Foundation/psf-bch-api). [FullStack.cash](https://fullstack.cash) offers paid cloud access to psf-bch-api. You can run your own infrastructure by following documentation on [CashStack.info](https://cashstack.info).
 
-### Quick Start Videos:
-
-YouTube walk-through videos to help you get started:
-
-- [Introduction to bch-js and the bch-js-examples repository](https://youtu.be/GD2i1ZUiyrk)
-
 ### Quick Links
 
+- [Code Examples](https://github.com/Permissionless-Software-Foundation/psf-js-examples) using bch-js
 - [npm Library](https://www.npmjs.com/package/@psf/bch-js)
-- [Documentation](https://bchjs.fullstack.cash/)
+- [API Reference](https://bchjs.fullstack.cash/)
-- [Examples](https://github.com/Permissionless-Software-Foundation/bch-js-examples)
 - [x402-bch.fullstack.cash](https://x402-bch.fullstack.cash) - The REST API this library talks to by default.
 - [FullStack.cash](https://fullstack.cash) - cloud-based infrastructure for application developers.
-- [Permissionless Software Foundation](https://psfoundation.cash) - The organization that maintains this library.
 - [CashStack.info](https://cashstack.info) - bch-js is part of the Cash Stack, a JavaScript framework for writing web 2 and web 3 business applications.
+- [Permissionless Software Foundation](https://psfoundation.info) - The organization that maintains this library.
+
 
 ### Quick Notes
 
@@ -115,24 +110,11 @@ const bchjs2 = new BCHJS({
 
 [bch-wallet-web3-spa](https://github.com/Permissionless-Software-Foundation/bch-wallet-web3-spa) is a React web app template using bch-js and minimal-slp-wallet.
 
-## Features
-
-- [ECMAScript 2017 standard JavaScript](https://en.wikipedia.org/wiki/ECMAScript#8th_Edition_-_ECMAScript_2017) used instead of TypeScript. Works
-  natively with node.js v10 or higher.
-
-- Full SLP tokens support: bch-js has full support for all SLP token functionality, including send, mint, and genesis transactions. It also fully supports all aspects of [non-fugible tokans (NFTs)](https://www.youtube.com/watch?v=vvlpYUx6HRs).
-
-- [Semantic Release](https://github.com/semantic-release/semantic-release) for
-  continuous delivery using semantic versioning.
-
-- [IPFS](https://ipfs.io) and [Radicle](https://radicle.xyz) uploads of all files and dependencies, to backup
-  dependencies in case they are ever inaccessible from GitHub or npm.
-
 ## Documentation:
 
 Full documentation for this library can be found here:
 
-- [Documentation](https://bchjs.fullstack.cash/)
+- [API Reference](https://bchjs.fullstack.cash/)
 
 bch-js uses [APIDOC](http://apidocjs.com/) so that documentation and working code
 live in the same repository. To generate the documentation:
@@ -154,17 +136,6 @@ This open source software is developed and maintained by the [Permissionless Sof
 <p>bitcoincash:qqsrke9lh257tqen99dkyy2emh4uty0vky9y0z0lsr</p>
 </div>
 
-
-## IPFS & Radicle Releases
-
-Copies of this repository are also published on [IPFS](https://ipfs.io).
-
-- v6.2.10: `bafybeifsioj3ba77u2763nsyuzq53gtbdxsnqpoipvdl4immj6ytznjaoy`
-- (with dependencies, node v14.18.2 and npm v8.8.0): `bafybeihfendd4oj6uxvvecm7sluobwwhpb5wdcxhvhmx56e667nxdncd4a`
-
-They are also posted to the Radicle:
-- v6.2.10: `rad:git:hnrkkroqnbfwj6uxpfjuhspoxnfm4i8e6oqwy`
-
 ## License
 
 [MIT](LICENSE.md)

src/raw-transactions.js

@@ -15,6 +15,46 @@ class RawTransactions {
 
     // Use the shared axios instance if provided, otherwise fall back to axios
     this.axios = config.axios || axios
+
+    // Retry configuration for transient network failures during broadcast.
+    this.maxBroadcastRetries = 2
+    this.broadcastRetryDelayMs = 250
+  }
+
+  _sleep (ms) {
+    return new Promise(resolve => setTimeout(resolve, ms))
+  }
+
+  _isTransientNetworkError (error) {
+    if (!error) return false
+
+    const msg = String(error.message || '').toLowerCase()
+    const causeMsg = String(error?.cause?.message || '').toLowerCase()
+    const stack = String(error.stack || '').toLowerCase()
+    const code = String(error.code || error?.cause?.code || '').toUpperCase()
+
+    if (['ECONNRESET', 'EPIPE', 'ETIMEDOUT'].includes(code)) return true
+    if (msg.includes('socket hang up')) return true
+    if (causeMsg.includes('socket hang up')) return true
+    if (stack.includes('socket hang up')) return true
+
+    return false
+  }
+
+  async _postSendRawTransaction (hexes) {
+    const options = {
+      method: 'POST',
+      url: `${this.restURL}full-node/rawtransactions/sendRawTransaction`,
+      data: {
+        hexes
+      },
+      headers: {
+        ...this.axiosOptions.headers,
+        Connection: 'close'
+      }
+    }
+
+    return this.axios(options)
   }
 
   /**
@@ -448,7 +488,13 @@ class RawTransactions {
       if (typeof hex === 'string') {
         const response = await this.axios.get(
           `${this.restURL}full-node/rawtransactions/sendRawTransaction/${hex}`,
-          this.axiosOptions
+          {
+            ...this.axiosOptions,
+            headers: {
+              ...this.axiosOptions.headers,
+              Connection: 'close'
+            }
+          }
         )
 
         if (response.data === '66: insufficient priority') {
@@ -463,17 +509,25 @@ class RawTransactions {
 
         // Array input
       } else if (Array.isArray(hex)) {
-        const options = {
+        let lastErr
-          method: 'POST',
-          url: `${this.restURL}full-node/rawtransactions/sendRawTransaction`,
-          data: {
-            hexes: hex
-          },
-          headers: this.axiosOptions.headers
-        }
-        const response = await this.axios(options)
 
-        return response.data
+        for (let attempt = 0; attempt <= this.maxBroadcastRetries; attempt++) {
+          try {
+            const response = await this._postSendRawTransaction(hex)
+            return response.data
+          } catch (err) {
+            lastErr = err
+
+            const isLastAttempt = attempt >= this.maxBroadcastRetries
+            const shouldRetry = this._isTransientNetworkError(err) && !isLastAttempt
+            if (!shouldRetry) throw err
+
+            const delay = this.broadcastRetryDelayMs * Math.pow(2, attempt)
+            await this._sleep(delay)
+          }
+        }
+
+        throw lastErr
       }
 
       throw new Error('Input hex must be a string or array of strings.')

test/unit/raw-transactions.unit.js

@@ -0,0 +1,71 @@
+/*
+  Focused unit tests for retry behavior in raw-transactions.js.
+*/
+
+import assert from 'assert'
+import sinon from 'sinon'
+
+import RawTransactions from '../../src/raw-transactions.js'
+
+describe('#RawTransactions Retry Logic', () => {
+  afterEach(() => sinon.restore())
+
+  it('retries once on ECONNRESET and succeeds', async () => {
+    const axiosStub = sinon.stub()
+    axiosStub.onCall(0).rejects(Object.assign(new Error('socket hang up'), { code: 'ECONNRESET' }))
+    axiosStub.onCall(1).resolves({ data: ['txid-123'] })
+
+    const uut = new RawTransactions({
+      restURL: 'http://localhost:5942/v6/',
+      authToken: '',
+      axios: axiosStub
+    })
+    uut.broadcastRetryDelayMs = 0
+
+    const result = await uut.sendRawTransaction(['abcd'])
+
+    assert.deepStrictEqual(result, ['txid-123'])
+    assert.equal(axiosStub.callCount, 2)
+    assert.equal(axiosStub.getCall(0).args[0].headers.Connection, 'close')
+    assert.equal(axiosStub.getCall(1).args[0].headers.Connection, 'close')
+  })
+
+  it('does not retry on non-transient errors', async () => {
+    const axiosStub = sinon.stub()
+    axiosStub.rejects(new Error('RPC validation error'))
+
+    const uut = new RawTransactions({
+      restURL: 'http://localhost:5942/v6/',
+      authToken: '',
+      axios: axiosStub
+    })
+    uut.broadcastRetryDelayMs = 0
+
+    await assert.rejects(
+      uut.sendRawTransaction(['abcd']),
+      /RPC validation error/
+    )
+    assert.equal(axiosStub.callCount, 1)
+  })
+
+  it('enforces retry cap for repeated transient failures', async () => {
+    const axiosStub = sinon.stub()
+    axiosStub.rejects(Object.assign(new Error('socket hang up'), { code: 'ECONNRESET' }))
+
+    const uut = new RawTransactions({
+      restURL: 'http://localhost:5942/v6/',
+      authToken: '',
+      axios: axiosStub
+    })
+    uut.broadcastRetryDelayMs = 0
+    uut.maxBroadcastRetries = 3
+
+    await assert.rejects(
+      uut.sendRawTransaction(['abcd']),
+      /socket hang up/
+    )
+
+    // 1 initial attempt + 2 retries.
+    assert.equal(axiosStub.callCount, 4)
+  })
+})