feat(dsproof): Created v5 GET dsproof endpoint

src/app.js

@@ -46,6 +46,7 @@ const ControlV5 = require('./routes/v5/full-node/control')
 const MiningV5 = require('./routes/v5/full-node/mining')
 const networkV5 = require('./routes/v5/full-node/network')
 const RawtransactionsV5 = require('./routes/v5/full-node/rawtransactions')
+const DSProofV5 = require('./routes/v5/full-node/dsproof')
 const UtilV5 = require('./routes/v5/util')
 const SlpV5 = require('./routes/v5/slp')
 const xpubV5 = require('./routes/v5/xpub')
@@ -78,7 +79,7 @@ const electrumxv5 = new ElectrumXV5()
 const encryptionv5 = new EncryptionV5()
 const pricev5 = new PriceV5()
 const utilV5 = new UtilV5({ electrumx: electrumxv5 })
-
+const dsproofV5 = new DSProofV5()
 const app = express()
 
 app.locals.env = process.env
@@ -187,6 +188,7 @@ app.use(`/${v5prefix}/` + 'electrumx', electrumxv5.router)
 app.use(`/${v5prefix}/` + 'encryption', encryptionv5.router)
 app.use(`/${v5prefix}/` + 'price', pricev5.router)
 app.use(`/${v5prefix}/` + 'util', utilV5.router)
+app.use(`/${v5prefix}/` + 'dsproof', dsproofV5.router)
 
 // const ninsight = new Ninsight()
 app.use(`/${v5prefix}/` + 'ninsight', ninsight.router)

src/routes/v5/full-node/dsproof.js

@@ -0,0 +1,95 @@
+'use strict'
+
+const express = require('express')
+const router = express.Router()
+
+const axios = require('axios')
+const wlogger = require('../../../util/winston-logging')
+
+const RouteUtils = require('../../../util/route-utils')
+const routeUtils = new RouteUtils()
+
+// Used to convert error messages to strings, to safely pass to users.
+const util = require('util')
+util.inspect.defaultOptions = { depth: 1 }
+
+let _this
+class DSProof {
+  constructor () {
+    _this = this
+    _this.axios = axios
+    _this.routeUtils = routeUtils
+
+    _this.router = router
+    _this.router.get('/', this.root)
+    _this.router.get('/getdsproof/:txid', _this.getDSProof)
+  }
+
+  // DRY error handler.
+  errorHandler (err, res) {
+    // Attempt to decode the error message.
+    const { msg, status } = _this.routeUtils.decodeError(err)
+    if (msg) {
+      res.status(status)
+      return res.json({ error: msg })
+    }
+
+    res.status(500)
+    return res.json({ error: util.inspect(err) })
+  }
+
+  root (req, res, next) {
+    return res.json({ status: 'dsproof' })
+  }
+
+  /**
+   * @api {get} /dsproof/getdsproof/:txid  Get Double-Spend Proof.
+   * @apiName DS Proof.
+   * @apiGroup DSProof
+   * @apiDescription Get information for a double-spend proof.
+   *
+   *
+   * @apiExample Example usage:
+   * curl -X GET "https://api.fullstack.cash/v5/dsproof/getdsproof/a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d" -H "accept: application/json"
+   *
+   *
+   */
+  async getDSProof (req, res, next) {
+    try {
+      const txid = req.params.txid
+
+      let verbose = 2 // default
+      if (req.query.verbose === 'true') verbose = 3
+
+      if (!txid || txid === '') {
+        res.status(400)
+        return res.json({
+          success: false,
+          error: 'txid can not be empty'
+        })
+      }
+
+      if (txid.length !== 64) {
+        res.status(400)
+        return res.json({
+          success: false,
+          error: `txid must be of length 64 (not ${txid.length})`
+        })
+      }
+
+      const options = _this.routeUtils.getAxiosOptions()
+      options.data.id = 'getdsproof'
+      options.data.method = 'getdsproof'
+      options.data.params = [txid, verbose]
+
+      const response = await _this.axios.request(options)
+      return res.json(response.data.result)
+    } catch (err) {
+      wlogger.error('Error in dsproof.js/getDSProof().', err)
+
+      return _this.errorHandler(err, res)
+    }
+  }
+}
+
+module.exports = DSProof

test/v5/dsproof.js

@@ -0,0 +1,190 @@
+/*
+  TESTS FOR THE DSPROOF.JS LIBRARY
+
+  This test file uses the environment variable TEST to switch between unit
+  and integration tests. By default, TEST is set to 'unit'. Set this variable
+  to 'integration' to run the tests against BCH mainnet.
+*/
+
+'use strict'
+
+const chai = require('chai')
+const assert = chai.assert
+const DSProofRoute = require('../../src/routes/v5/full-node/dsproof')
+const uut = new DSProofRoute()
+
+// const nock = require('nock') // HTTP mocking
+const sinon = require('sinon')
+
+let originalEnvVars // Used during transition from integration to unit tests.
+
+// Mocking data.
+const { mockReq, mockRes } = require('./mocks/express-mocks')
+const mockData = require('./mocks/dsproof-mocks')
+
+// Used for debugging.
+const util = require('util')
+util.inspect.defaultOptions = { depth: 1 }
+
+describe('#DSProof', () => {
+  let req, res
+  let sandbox
+  before(() => {
+    // Save existing environment variables.
+    originalEnvVars = {
+      BITCOINCOM_BASEURL: process.env.BITCOINCOM_BASEURL,
+      RPC_BASEURL: process.env.RPC_BASEURL,
+      RPC_USERNAME: process.env.RPC_USERNAME,
+      RPC_PASSWORD: process.env.RPC_PASSWORD
+    }
+
+    // Set default environment variables for unit tests.
+    if (!process.env.TEST) process.env.TEST = 'unit'
+    if (process.env.TEST === 'unit') {
+      process.env.BITCOINCOM_BASEURL = 'http://fakeurl/api/'
+      process.env.RPC_BASEURL = 'http://fakeurl/api'
+      process.env.RPC_USERNAME = 'fakeusername'
+      process.env.RPC_PASSWORD = 'fakepassword'
+    }
+  })
+
+  // Setup the mocks before each test.
+  beforeEach(() => {
+    // Mock the req and res objects used by Express routes.
+    req = mockReq
+    res = mockRes
+
+    // Explicitly reset the parmas and body.
+    req.params = {}
+    req.body = {}
+    req.query = {}
+
+    sandbox = sinon.createSandbox()
+  })
+
+  afterEach(() => {
+    // Restore Sandbox
+    sandbox.restore()
+  })
+
+  after(() => {
+    // Restore any pre-existing environment variables.
+    process.env.BITCOINCOM_BASEURL = originalEnvVars.BITCOINCOM_BASEURL
+    process.env.RPC_BASEURL = originalEnvVars.RPC_BASEURL
+    process.env.RPC_USERNAME = originalEnvVars.RPC_USERNAME
+    process.env.RPC_PASSWORD = originalEnvVars.RPC_PASSWORD
+  })
+
+  describe('#root', async () => {
+    // root route handler.
+    it('should respond to GET for base route', async () => {
+      const result = uut.root(req, res)
+      // console.log(`result: ${util.inspect(result)}`)
+
+      assert.equal(result.status, 'dsproof', 'Returns static string')
+    })
+  })
+
+  describe('#getDSProof', async () => {
+    it('should throw 400 error if txid  is missing', async () => {
+      const result = await uut.getDSProof(req, res)
+      // console.log(`result: ${util.inspect(result)}`)
+
+      assert.hasAllKeys(result, ['error', 'success'])
+      assert.isFalse(result.success)
+      assert.include(result.error, 'txid can not be empty')
+    })
+    it('should throw 400 error if txid is invalid', async () => {
+      req.params.txid = 'abc123'
+
+      const result = await uut.getDSProof(req, res)
+
+      assert.hasAllKeys(result, ['error', 'success'])
+      assert.isFalse(result.success)
+
+      assert.equal(res.statusCode, 400, 'HTTP status code 400 expected.')
+      assert.include(result.error, 'txid must be of length 64')
+    })
+    it('should throw 503 when network issues', async () => {
+      req.params.txid =
+        'ee0df780b58f6f24467605b2589c44c3a50fc849fb8f91b89669a4ae0d86bc7e'
+
+      // Save the existing RPC URL.
+      const savedUrl2 = process.env.RPC_BASEURL
+
+      // Manipulate the URL to cause a 500 network error.
+      process.env.RPC_BASEURL = 'http://fakeurl/api/'
+
+      await uut.getDSProof(req, res)
+      // console.log(`result: ${util.inspect(result)}`)
+
+      // Restore the saved URL.
+      process.env.RPC_BASEURL = savedUrl2
+
+      assert.isAbove(
+        res.statusCode,
+        499,
+        'HTTP status code 500 or greater expected.'
+      )
+      // assert.include(result.error,"Network error: Could not communicate with full node","Error message expected")
+    })
+    it('returns proper error when downstream service stalls', async () => {
+      req.params.txid =
+        'ee0df780b58f6f24467605b2589c44c3a50fc849fb8f91b89669a4ae0d86bc7e'
+      // Mock the timeout error.
+      sandbox.stub(uut.axios, 'request').throws({ code: 'ECONNABORTED' })
+
+      const result = await uut.getDSProof(req, res)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.isAbove(res.statusCode, 499, 'HTTP status code 503 expected.')
+      assert.include(
+        result.error,
+        'Could not communicate with full node',
+        'Error message expected'
+      )
+    })
+
+    it('returns proper error when downstream service is down', async () => {
+      req.params.txid =
+        'ee0df780b58f6f24467605b2589c44c3a50fc849fb8f91b89669a4ae0d86bc7e'
+      // Mock the timeout error.
+      sandbox.stub(uut.axios, 'request').throws({ code: 'ECONNREFUSED' })
+
+      const result = await uut.getDSProof(req, res)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.isAbove(res.statusCode, 499, 'HTTP status code 503 expected.')
+      assert.include(
+        result.error,
+        'Could not communicate with full node',
+        'Error message expected'
+      )
+    })
+
+    it('should GET double-spend proof', async function () {
+      req.params.txid =
+        'ee0df780b58f6f24467605b2589c44c3a50fc849fb8f91b89669a4ae0d86bc7e'
+      // Mock the RPC call for unit tests.
+      if (process.env.TEST === 'unit') {
+        sandbox
+          .stub(uut.axios, 'request')
+          .resolves({ data: { result: mockData.mockGetDsProof } })
+      } else {
+        return this.skip()
+      }
+
+      const result = await uut.getDSProof(req, res)
+      // console.log(`result: ${util.inspect(result)}`)
+
+      assert.property(result, 'dspid')
+      assert.property(result, 'txid')
+      assert.property(result, 'outpoint')
+      assert.property(result, 'path')
+      assert.property(result, 'descendants')
+
+      assert.property(result.outpoint, 'txid')
+      assert.property(result.outpoint, 'vout')
+    })
+  })
+})

test/v5/mocks/dsproof-mocks.js

@@ -0,0 +1,22 @@
+/*
+  This library contains mocking data for running unit tests on the dsproof route.
+*/
+
+'use strict'
+
+const mockGetDsProof = {
+  dspid: '6234fff2a9dbcaa50e2c50d74e1d725a2bed1757d7a05a2db7a82df659554397',
+  txid: 'ee0df780b58f6f24467605b2589c44c3a50fc849fb8f91b89669a4ae0d86bc7e',
+  outpoint: {
+    txid: '17ebef34f7e9a0692317dd6fbb43ffccff45b7d688a2a754dbccfc5e6d93ce3e',
+    vout: 1
+  },
+  path: ['ee0df780b58f6f24467605b2589c44c3a50fc849fb8f91b89669a4ae0d86bc7e'],
+  descendants: [
+    'ee0df780b58f6f24467605b2589c44c3a50fc849fb8f91b89669a4ae0d86bc7e'
+  ]
+}
+
+module.exports = {
+  mockGetDsProof
+}