Merge pull request #28 from Permissionless-Software-Foundation/ct-unstable

feat(hydrateUtxos): Porting hydrateUtxos convenience utility function

.gitignore

@@ -19,6 +19,7 @@ start-fullstack-test.sh
 start-free-main.sh
 start-local-mainnet.sh.save
 start-local-testnet.sh.save
+temp.sh
 
 coverage
 start-my-infra

README.md

@@ -18,7 +18,7 @@ Both bch-api and bch-js are part of the
 - [API Documentation](https://fullstack.cash/documentation)
 - [Example Code](https://fullstack.cash/examples)
 
-Have questions? Need help? Join our community support
+Have questions? Need help? Join our community support:
 [Telegram channel](https://t.me/bch_js_toolkit)
 
 ## Features

package-lock.json

@@ -147,106 +147,6 @@
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-        "bip39": "^3.0.2",
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-        "buffer": "^5.1.0",
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@@ -465,6 +365,127 @@
         "@types/node": ">= 8"
       }
     },
+    "@psf/bch-js": {
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+      "resolved": "https://registry.npmjs.org/@psf/bch-js/-/bch-js-3.5.5.tgz",
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+        "axios": "^0.19.0",
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+        "bchaddrjs-slp": "^0.2.5",
+        "bigi": "^1.4.2",
+        "bignumber.js": "^9.0.0",
+        "bip-schnorr": "^0.3.0",
+        "bip21": "github:Bitcoin-com/bip21",
+        "bip32-utils": "github:Bitcoin-com/bip32-utils#0.13.1",
+        "bip38": "^2.0.2",
+        "bip39": "^3.0.2",
+        "bip66": "^1.1.5",
+        "bitcoincash-ops": "github:christroutner/bitcoincash-ops",
+        "bitcoincashjs-lib": "github:christroutner/bitcoincashjs-lib#master",
+        "bitcoinjs-message": "^2.0.0",
+        "bs58": "^4.0.1",
+        "buffer": "^5.1.0",
+        "cashaddrjs": "^0.3.3",
+        "chalk": "^2.3.0",
+        "clear": "0.1.0",
+        "coininfo": "github:Bitcoin-com/coininfo",
+        "commander": "^3.0.0",
+        "cp-file": "^7.0.0",
+        "ecurve": "^1.0.6",
+        "figlet": "^1.2.0",
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+        "qrcode": "^1.4.1",
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+        "repl.history": "^0.1.4",
+        "safe-buffer": "^5.1.2",
+        "satoshi-bitcoin": "^1.0.4",
+        "slp-mdm": "0.0.6",
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+        "socket.io-client": "^2.1.1",
+        "touch": "^3.1.0",
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+            }
+          }
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+        "bitcoincashjs-lib": {
+          "version": "github:christroutner/bitcoincashjs-lib#715823b5d6eb3e2961e715605ad1464f3223da0b",
+          "from": "github:christroutner/bitcoincashjs-lib#master",
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+            "bigi": "^1.4.0",
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+            "create-hmac": "^1.1.3",
+            "ecurve": "^1.0.0",
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+            "randombytes": "^2.0.1",
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+            "varuint-bitcoin": "^1.0.4",
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@@ -7551,6 +7571,11 @@
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-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.0.tgz",
-      "integrity": "sha512-8dG4H5ujfvFiqDmVu9fQ5bOHUC15JMjMY/Zumv26oOvvVJjM67KF8koCWIabKQ1GJIa9r2mMZscBq/TbdOcmNA==",
+      "version": "2.6.1",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.1.tgz",
+      "integrity": "sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==",
       "dev": true
     },
     "node-gyp-build": {

package.json

@@ -28,7 +28,7 @@
     "node": ">=10.15.1"
   },
   "dependencies": {
-    "@chris.troutner/bch-js": "^3.0.1",
+    "@psf/bch-js": "^3.5.5",
     "apidoc": "^0.23.0",
     "axios": "^0.19.0",
     "bitcore-lib-cash": "^8.20.3",
@@ -37,7 +37,7 @@
     "cors": "^2.8.3",
     "debug": "~4.1.1",
     "dotenv": "^8.0.0",
-    "electrum-cash": "^1.0.1",
+    "electrum-cash": "^2.0.2",
     "express": "^4.15.5",
     "express-basic-auth": "^1.1.3",
     "express-rate-limit": "^5.0.0",

src/routes/v3/blockbook.js

@@ -23,7 +23,7 @@ const router = express.Router()
 const util = require('util')
 util.inspect.defaultOptions = { depth: 1 }
 
-const BCHJS = require('@chris.troutner/bch-js')
+const BCHJS = require('@psf/bch-js')
 const bchjs = new BCHJS()
 
 let _this

src/routes/v3/electrumx.js

@@ -10,7 +10,7 @@ const axios = require('axios')
 const util = require('util')
 const bitcore = require('bitcore-lib-cash')
 
-const ElectrumCash = require('electrum-cash').Client
+const ElectrumCash = require('electrum-cash').ElectrumClient
 // const ElectrumCash = require('/home/trout/work/personal/electrum-cash/electrum.js').Client // eslint-disable-line
 
 const wlogger = require('../../util/winston-logging')
@@ -19,7 +19,7 @@ const config = require('../../../config')
 const RouteUtils = require('../../util/route-utils')
 const routeUtils = new RouteUtils()
 
-const BCHJS = require('@chris.troutner/bch-js')
+const BCHJS = require('@psf/bch-js')
 const bchjs = new BCHJS()
 
 let _this
@@ -50,8 +50,10 @@ class Electrum {
     _this.router.get('/', _this.root)
     _this.router.get('/utxos/:address', _this.getUtxos)
     _this.router.post('/utxos', _this.utxosBulk)
-    _this.router.get('/tx/data/:address', _this.getTransactionDetails)
+    _this.router.get('/tx/data/:txid', _this.getTransactionDetails)
     _this.router.post('/tx/data', _this.transactionDetailsBulk)
+    _this.router.get('/block/headers/:height', _this.getBlockHeaders)
+    _this.router.post('/block/headers', _this.blockHeadersBulk)
     _this.router.get('/balance/:address', _this.getBalance)
     _this.router.post('/balance', _this.balanceBulk)
     _this.router.get('/transactions/:address', _this.getTransactions)
@@ -489,6 +491,175 @@ class Electrum {
     }
   }
 
+  // Returns a promise that resolves to block header data for a block height.
+  // Expects input to be a height number, and input validation to have already
+  // been done by parent, calling function.
+  async _blockHeadersFromElectrum (height, count = 1) {
+    try {
+      if (!_this.isReady) {
+        throw new Error(
+          'ElectrumX server connection is not ready. Call await connectToServer() first.'
+        )
+      }
+
+      // Query the block header from the ElectrumX server.
+      const electrumResponse = await _this.electrumx.request('blockchain.block.headers', height, count)
+      // console.log(
+      //   `electrumResponse: ${JSON.stringify(electrumResponse, null, 2)}`
+      // )
+
+      const HEADER_SIZE = 80 * 2
+
+      if (!(electrumResponse instanceof Error)) {
+        const headers = electrumResponse.hex.match(new RegExp(`.{1,${HEADER_SIZE}}`, 'g'))
+        return headers
+      }
+
+      return electrumResponse
+    } catch (err) {
+      // console.log('err: ', err)
+
+      // Write out error to error log.
+      wlogger.error(
+        'Error in elecrumx.js/_blockHeaderFromElectrum(): ',
+        err
+      )
+      throw err
+    }
+  }
+
+  /**
+   * @api {get} /electrumx/block/headers/{height} Get `count` block headers starting at a height
+   * @apiName Block header data for a `count` blocks starting at a block height
+   * @apiGroup ElectrumX / Fulcrum
+   * @apiDescription Returns an array with block headers starting at the block height
+   *
+   *
+   * @apiExample Example usage:
+   * curl -X GET "https://api.fullstack.cash/v3/electrumx/block/header/42?count=2" -H "accept: application/json"
+   *
+   */
+  // GET handler for single block headers
+  async getBlockHeaders (req, res, next) {
+    try {
+      const height = Number(req.params.height)
+      const count = req.query.count === undefined ? 1 : Number(req.query.count)
+
+      // Reject if height is not a number
+      if (Number.isNaN(height) || height < 0) {
+        res.status(400)
+        return res.json({
+          success: false,
+          error: 'height must be a positive number'
+        })
+      }
+
+      // Reject if height is not a number
+      if (Number.isNaN(count) || count < 0) {
+        res.status(400)
+        return res.json({
+          success: false,
+          error: 'count must be a positive number'
+        })
+      }
+
+      wlogger.debug(
+        'Executing electrumx/getBlockHeaders with this height: ',
+        height
+      )
+
+      // Get data from ElectrumX server.
+      const electrumResponse = await _this._blockHeadersFromElectrum(height, count)
+      // console.log(`_transactionDetailsFromElectrum(): ${JSON.stringify(electrumResponse, null, 2)}`)
+
+      // Pass the error message if ElectrumX reports an error.
+      if (electrumResponse instanceof Error) {
+        res.status(400)
+        return res.json({
+          success: false,
+          error: electrumResponse.message
+        })
+      }
+
+      res.status(200)
+      return res.json({
+        success: true,
+        headers: electrumResponse
+      })
+    } catch (err) {
+      // Write out error to error log.
+      wlogger.error('Error in elecrumx.js/getBlockHeader().', err)
+
+      return _this.errorHandler(err, res)
+    }
+  }
+
+  /**
+   * @api {post} /electrumx/block/headers Get block headers for an array of height + count pairs
+   * @apiName  Block headers for an array of height + count pairs
+   * @apiGroup ElectrumX / Fulcrum
+   * @apiDescription Returns an array of objects with blockheaders of an array of TXIDs.
+   * Limited to 20 items per request.
+   *
+   * @apiExample Example usage:
+   * curl -X POST "https://api.fullstack.cash/v3/electrumx/block/headers" -H "accept: application/json" -H "Content-Type: application/json" -d '{"heights":[{ "height": 42, count: 2 }, { "height": 100, count: 5 }]}'
+   *
+   */
+  // POST handler for bulk queries on block headers
+  async blockHeadersBulk (req, res, next) {
+    try {
+      const heights = req.body.heights
+
+      // Reject if heights is not an array.
+      if (!Array.isArray(heights)) {
+        res.status(400)
+        return res.json({
+          success: false,
+          error: 'heights needs to be an array. Use GET for single height.'
+        })
+      }
+
+      // Enforce array size rate limits
+      if (!_this.routeUtils.validateArraySize(req, heights)) {
+        res.status(429) // https://github.com/Bitcoin-com/rest.bitcoin.com/issues/330
+        return res.json({
+          success: false,
+          error: 'Array too large.'
+        })
+      }
+
+      wlogger.debug(
+        'Executing electrumx.js/blockHeadersBulk with these txids: ',
+        heights
+      )
+
+      // Loops through each address and creates an array of Promises, querying
+      // the Electrum server in parallel.
+      const transactions = heights.map(async (obj) => {
+        const headers = await _this._blockHeadersFromElectrum(
+          obj.height,
+          obj.count
+        )
+
+        return { headers }
+      })
+
+      // Wait for all parallel Electrum requests to return.
+      const result = await Promise.all(transactions)
+
+      // Return the array of retrieved transaction details.
+      res.status(200)
+      return res.json({
+        success: true,
+        headers: result
+      })
+    } catch (err) {
+      wlogger.error('Error in electrumx.js/blockHeadersBulk().', err)
+
+      return _this.errorHandler(err, res)
+    }
+  }
+
   // Returns a promise that resolves to a balance for an address. Expects input
   // to be a cash address, and input validation to have already been done by
   // parent, calling function.

src/routes/v3/encryption.js

@@ -15,7 +15,7 @@ const config = require('../../../config')
 const RouteUtils = require('../../util/route-utils')
 const routeUtils = new RouteUtils()
 
-const BCHJS = require('@chris.troutner/bch-js')
+const BCHJS = require('@psf/bch-js')
 const bchjs = new BCHJS()
 
 // Use Blockbook for getting indexer data.

src/routes/v3/full-node/blockchain.js

@@ -17,7 +17,7 @@ const routeUtils = new RouteUtils()
 const util = require('util')
 util.inspect.defaultOptions = { depth: 1 }
 
-const BCHJS = require('@chris.troutner/bch-js')
+const BCHJS = require('@psf/bch-js')
 const bchjs = new BCHJS()
 
 let _this

src/routes/v3/ninsight.js

@@ -11,7 +11,7 @@ const express = require('express')
 
 const router = express.Router()
 
-// const BCHJS = require('@chris.troutner/bch-js')
+// const BCHJS = require('@psf/bch-js')
 // const bchjs = new BCHJS()
 
 // let _this

src/routes/v3/route-utils.js

@@ -10,7 +10,7 @@ const wlogger = require('../../util/winston-logging')
 const util = require('util')
 util.inspect.defaultOptions = { depth: 1 }
 
-const BCHJS = require('@chris.troutner/bch-js')
+const BCHJS = require('@psf/bch-js')
 const bchjs = new BCHJS()
 
 module.exports = {

src/routes/v3/services/slpdb.js

@@ -1,6 +1,6 @@
 const axios = require('axios')
 
-const SLPSDK = require('@chris.troutner/bch-js')
+const SLPSDK = require('@psf/bch-js')
 const SLP = new SLPSDK()
 
 class Slpdb {

src/routes/v3/slp.js

@@ -13,7 +13,7 @@ const Slpdb = require('./services/slpdb')
 // const strftime = require('strftime')
 const wlogger = require('../../util/winston-logging')
 
-const BCHJS = require('@chris.troutner/bch-js')
+const BCHJS = require('@psf/bch-js')
 const bchjs = new BCHJS()
 
 // Used to convert error messages to strings, to safely pass to users.
@@ -79,6 +79,7 @@ class Slp {
       _this.txsByAddressSingle
     )
     _this.router.post('/generateSendOpReturn', _this.generateSendOpReturn)
+    _this.router.post('/hydrateUtxos', _this.hydrateUtxos)
   }
 
   // DRY error handler.
@@ -1519,6 +1520,75 @@ class Slp {
       })
     }
   }
+
+  /**
+   * @api {post} /slp/hydrateUtxos/ hydrateUtxos
+   * @apiName SLP hydrateUtxos
+   * @apiGroup SLP
+   * @apiDescription Hydrate UTXO data with SLP information.
+   *
+   * Expects an array of UTXO objects as input. Returns an array of equal size.
+   * Returns UTXO data hydrated with token information. If the UTXO does not
+   * belong to a SLP transaction, it will return an isValid property set to
+   * false. If the UTXO is part of an SLP transaction, it will return the UTXO
+   * object with additional SLP information attached. An isValid property will
+   * be included. If its value is true, the UTXO is a valid SLP UTXO. If the
+   * value is null, then SLPDB has not yet processed that txid and validity has
+   * not been confirmed.
+   *
+   * @apiExample Example usage:
+   * curl -X POST "https://api.fullstack.cash/v3/slp/hydrateUtxos" -H "accept:application/json" -H "Content-Type: application/json" -d '{"utxos":[{"txid": "d56a2b446d8149c39ca7e06163fe8097168c3604915f631bc58777d669135a56","vout": 3, "value": "6816", "height": 606848, "confirmations": 13, "satoshis": 6816}, {"txid": "d56a2b446d8149c39ca7e06163fe8097168c3604915f631bc58777d669135a56","vout": 2, "value": "546", "height": 606848, "confirmations": 13, "satoshis": 546}]}'
+   *
+   *
+   */
+  async hydrateUtxos (req, res, next) {
+    try {
+      const utxos = req.body.utxos
+
+      // Validate inputs
+      if (!Array.isArray(utxos)) {
+        res.status(422)
+        return res.json({
+          error: 'Input must be an array.'
+        })
+      }
+
+      if (!utxos.length) {
+        res.status(422)
+        return res.json({
+          error: 'Array should not be empty'
+        })
+      }
+
+      if (utxos.length > 20) {
+        res.status(422)
+        return res.json({
+          error: 'Array too long, max length is 20'
+        })
+      }
+
+      // Get Token Utxo Details
+      const details = await _this.bchjs.SLP.Utils.tokenUtxoDetails(utxos)
+      // console.log('details : ', details)
+
+      res.status(200)
+      return res.json({ slpUtxos: details })
+    } catch (err) {
+      wlogger.error('Error in slp.js/hydrateUtxos().', err)
+
+      // Decode the error message.
+      const { msg, status } = routeUtils.decodeError(err)
+      if (msg) {
+        res.status(status)
+        return res.json({ error: msg })
+      }
+
+      res.status(500)
+      return res.json({
+        error: 'Error in hydrateUtxos()'
+      })
+    }
+  }
 }
 
 module.exports = Slp

src/routes/v3/util.js

@@ -12,7 +12,7 @@ const blockbook = new Blockbook()
 const util = require('util')
 util.inspect.defaultOptions = { depth: 1 }
 
-const BCHJS = require('@chris.troutner/bch-js')
+const BCHJS = require('@psf/bch-js')
 const bchjs = new BCHJS()
 // const BCHJS_TESTNET = 'https://testnet.bchjs.cash/v3/'
 

src/routes/v3/xpub.js

@@ -16,7 +16,7 @@ const router = express.Router()
 const util = require('util')
 util.inspect.defaultOptions = { depth: 1 }
 
-const BCHJS = require('@chris.troutner/bch-js')
+const BCHJS = require('@psf/bch-js')
 const bchjs = new BCHJS()
 
 // Connect the route endpoints to their handler functions.

src/util/route-utils.js

@@ -10,7 +10,7 @@ const wlogger = require('./winston-logging')
 const util = require('util')
 util.inspect.defaultOptions = { depth: 1 }
 
-const BCHJS = require('@chris.troutner/bch-js')
+const BCHJS = require('@psf/bch-js')
 const bchjs = new BCHJS()
 
 // let _this

test/v3/a01-electrumx.js

@@ -96,7 +96,7 @@ describe('#ElectrumX Router', () => {
 
   // A wrapper for stubbing with the Sinon sandbox.
   function stubMethodForUnitTests (obj, method, value) {
-    if (!process.env.TEST === 'unit') return false
+    if (process.env.TEST !== 'unit') return false
 
     electrumxRoute.isReady = true // Force flag.
 
@@ -495,7 +495,7 @@ describe('#ElectrumX Router', () => {
     })
 
     it('should throw 400 on array input', async () => {
-      req.params.address = [
+      req.params.txid = [
         '4db095f34d632a4daf942142c291f1f2abb5ba2e1ccac919d85bdc2f671fb251'
       ]
 
@@ -666,6 +666,246 @@ describe('#ElectrumX Router', () => {
     })
   })
 
+  describe('#_blockHeadersFromElectrum', () => {
+    it('should return error object for invalid block height', async () => {
+      const height = -10
+
+      stubMethodForUnitTests(
+        electrumxRoute.electrumx,
+        'request',
+        new Error('Invalid height')
+      )
+
+      const result = await electrumxRoute._blockHeadersFromElectrum(height, 2)
+
+      assert.instanceOf(result, Error)
+      assert.include(result.message, 'Invalid height')
+    })
+
+    it('should return error object for invalid count', async () => {
+      const height = 42
+
+      stubMethodForUnitTests(
+        electrumxRoute.electrumx,
+        'request',
+        new Error('Invalid count')
+      )
+
+      const result = await electrumxRoute._blockHeadersFromElectrum(height, -1)
+
+      assert.instanceOf(result, Error)
+      assert.include(result.message, 'Invalid count')
+    })
+
+    it('should get block header for a single block height', async () => {
+      const height = 42
+
+      const mockedResponse = { count: 2, hex: mockData.blockHeaders.join(''), max: 2016 }
+
+      stubMethodForUnitTests(
+        electrumxRoute.electrumx,
+        'request',
+        mockedResponse
+      )
+
+      const result = await electrumxRoute._blockHeadersFromElectrum(height, 2)
+
+      assert.isArray(result)
+      assert.deepEqual(result, mockData.blockHeaders)
+    })
+  })
+
+  describe('#getBlockheaders', () => {
+    it('should throw 400 if height is not a number', async () => {
+      req.params.height = 'Hello'
+
+      const result = await electrumxRoute.getBlockHeaders(req, res)
+
+      expectRouteError(res, result, 'height must be a positive number')
+    })
+
+    it('should throw 400 if height is negative', async () => {
+      req.params.height = -42
+
+      const result = await electrumxRoute.getBlockHeaders(req, res)
+
+      expectRouteError(res, result, 'height must be a positive number')
+    })
+
+    it('should throw 400 if count is not a number', async () => {
+      req.params.height = 42
+      req.query.count = 'Hello'
+
+      const result = await electrumxRoute.getBlockHeaders(req, res)
+
+      expectRouteError(res, result, 'count must be a positive number')
+    })
+
+    it('should throw 400 if count is negative', async () => {
+      req.params.height = 42
+      req.query.count = -10
+
+      const result = await electrumxRoute.getBlockHeaders(req, res)
+
+      expectRouteError(res, result, 'count must be a positive number')
+    })
+
+    it('should throw 400 on array input', async () => {
+      req.params.height = [42, 42]
+
+      const result = await electrumxRoute.getBlockHeaders(req, res)
+
+      expectRouteError(res, result, 'height must be a positive number')
+    })
+
+    it('should return error object for invalid height', async () => {
+      req.params.height = 1000000000
+
+      stubMethodForUnitTests(
+        electrumxRoute.electrumx,
+        'request',
+        new Error('Invalid height')
+      )
+
+      // Call the details API.
+      const result = await electrumxRoute.getBlockHeaders(req, res)
+
+      expectRouteError(res, result, 'Invalid height')
+    })
+
+    it('should get headers for a single block height with count 2', async () => {
+      req.params.height = 42
+      req.query.count = 2
+
+      stubMethodForUnitTests(
+        electrumxRoute,
+        '_blockHeadersFromElectrum',
+        mockData.blockHeaders
+      )
+
+      // Call the details API.
+      const result = await electrumxRoute.getBlockHeaders(req, res)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.property(result, 'success')
+      assert.equal(result.success, true)
+
+      assert.property(result, 'headers')
+      assert.isArray(result.headers)
+      assert.deepEqual(result.headers, mockData.blockHeaders)
+    })
+  })
+
+  describe('#blockHeadersBulk', () => {
+    it('should throw an error for an empty body', async () => {
+      req.body = {}
+
+      const result = await electrumxRoute.blockHeadersBulk(req, res)
+
+      expectRouteError(res, result, 'heights needs to be an array')
+    })
+
+    it('should error on non-array single height', async () => {
+      req.body = {
+        heights: 42
+      }
+
+      const result = await electrumxRoute.blockHeadersBulk(req, res)
+
+      expectRouteError(res, result, 'heights needs to be an array')
+    })
+
+    it('should NOT throw 400 error for an invalid height', async () => {
+      req.body = {
+        heights: [
+          { height: -10, count: 2 }
+        ]
+      }
+
+      stubMethodForUnitTests(
+        electrumxRoute,
+        '_blockHeadersFromElectrum',
+        mockData.blockHeaders
+      )
+
+      const result = await electrumxRoute.blockHeadersBulk(req, res)
+
+      // This should probably throw a 400 error, but to be consistent with the other
+      // bulk endpoints it doesn't throw. This will change in the future
+      // expectRouteError(res, result, 'Invalid tx hash')
+
+      assert.property(result, 'success')
+      assert.equal(result.success, true)
+
+      assert.property(result, 'headers')
+      assert.isArray(result.headers)
+    })
+
+    it('should throw 429 error if heights array is too large', async () => {
+      const testArray = []
+      for (var i = 0; i < 25; i++) testArray.push('')
+
+      req.body.heights = testArray
+
+      const result = await electrumxRoute.blockHeadersBulk(req, res)
+
+      expectRouteError(res, result, 'Array too large', 429)
+    })
+
+    it('should get details for a single height', async () => {
+      req.body = {
+        heights: [
+          { height: 42, count: 2 }
+        ]
+      }
+
+      stubMethodForUnitTests(
+        electrumxRoute,
+        '_blockHeadersFromElectrum',
+        mockData.blockHeaders
+      )
+
+      // Call the details API.
+      const result = await electrumxRoute.blockHeadersBulk(req, res)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.property(result, 'success')
+      assert.equal(result.success, true)
+
+      assert.property(result, 'headers')
+      assert.isArray(result.headers)
+
+      assert.property(result.headers[0], 'headers')
+      assert.isArray(result.headers[0].headers)
+    })
+
+    it('should get details for multiple txids', async () => {
+      req.body = {
+        heights: [
+          { height: 42, count: 2 },
+          { height: 42, count: 2 }
+        ]
+      }
+
+      stubMethodForUnitTests(
+        electrumxRoute,
+        '_blockHeadersFromElectrum',
+        mockData.blockHeaders
+      )
+
+      // Call the details API.
+      const result = await electrumxRoute.blockHeadersBulk(req, res)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)'
+
+      assert.property(result, 'success')
+      assert.equal(result.success, true)
+
+      assert.isArray(result.headers)
+      assert.isArray(result.headers[0].headers)
+      assert.equal(result.headers.length, 2, '2 outputs for 2 inputs')
+    })
+  })
+
   describe('#_balanceFromElectrumx', () => {
     it('should throw error for invalid address', async () => {
       try {

test/v3/integration/slp.js

@@ -102,7 +102,7 @@ describe('#slp', () => {
     })
   })
 
-  describe('generateSendOpReturn', () => {
+  describe('#generateSendOpReturn', () => {
     it('should return OP_RETURN script', async () => {
       req.body.tokenUtxos = [
         {
@@ -121,4 +121,66 @@ describe('#slp', () => {
       assert.isNumber(result.outputs)
     })
   })
+
+  describe('#hydrateUtxos', () => {
+    it('should return utxo details', async () => {
+      const utxos = [
+        {
+          txid:
+            'd56a2b446d8149c39ca7e06163fe8097168c3604915f631bc58777d669135a56',
+          vout: 3,
+          value: '6816',
+          height: 606848,
+          confirmations: 13,
+          satoshis: 6816
+        },
+        {
+          txid:
+            'd56a2b446d8149c39ca7e06163fe8097168c3604915f631bc58777d669135a56',
+          vout: 2,
+          value: '546',
+          height: 606848,
+          confirmations: 13,
+          satoshis: 546
+        }
+      ]
+
+      req.body.utxos = utxos
+      const result = await slp.hydrateUtxos(req, res)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      // Test the general structure of the output.
+      assert.isArray(result.slpUtxos)
+      assert.equal(result.slpUtxos.length, 2)
+
+      // Test the non-slp UTXO.
+      assert.property(result.slpUtxos[0], 'txid')
+      assert.property(result.slpUtxos[0], 'vout')
+      assert.property(result.slpUtxos[0], 'value')
+      assert.property(result.slpUtxos[0], 'height')
+      assert.property(result.slpUtxos[0], 'confirmations')
+      assert.property(result.slpUtxos[0], 'satoshis')
+      assert.property(result.slpUtxos[0], 'isValid')
+      assert.equal(result.slpUtxos[0].isValid, false)
+
+      // Test the slp UTXO.
+      assert.property(result.slpUtxos[1], 'txid')
+      assert.property(result.slpUtxos[1], 'vout')
+      assert.property(result.slpUtxos[1], 'value')
+      assert.property(result.slpUtxos[1], 'height')
+      assert.property(result.slpUtxos[1], 'confirmations')
+      assert.property(result.slpUtxos[1], 'satoshis')
+      assert.property(result.slpUtxos[1], 'isValid')
+      assert.equal(result.slpUtxos[1].isValid, true)
+      assert.property(result.slpUtxos[1], 'transactionType')
+      assert.property(result.slpUtxos[1], 'tokenId')
+      assert.property(result.slpUtxos[1], 'tokenTicker')
+      assert.property(result.slpUtxos[1], 'tokenName')
+      assert.property(result.slpUtxos[1], 'tokenDocumentUrl')
+      assert.property(result.slpUtxos[1], 'tokenDocumentHash')
+      assert.property(result.slpUtxos[1], 'decimals')
+      assert.property(result.slpUtxos[1], 'tokenType')
+      assert.property(result.slpUtxos[1], 'tokenQty')
+    })
+  })
 })

test/v3/mocks/electrumx-mock.js

@@ -107,10 +107,16 @@ const txDetails = {
   ]
 }
 
+const blockHeaders = [
+  '010000008b52bbd72c2f49569059f559c1b1794de5192e4f7d6d2b03c7482bad0000000083e4f8a9d502ed0c419075c1abb5d56f878a2e9079e5612bfb76a2dc37d9c42741dd6849ffff001d2b909dd6',
+  '01000000f528fac1bcb685d0cd6c792320af0300a5ce15d687c7149548904e31000000004e8985a786d864f21e9cbb7cbdf4bc9265fe681b7a0893ac55a8e919ce035c2f85de6849ffff001d385ccb7c'
+]
+
 module.exports = {
   utxos,
   balance,
   txHistory,
   mempool,
-  txDetails
+  txDetails,
+  blockHeaders
 }

test/v3/slp.js

@@ -888,6 +888,148 @@ describe('#SLP', () => {
       assert.isNumber(result.outputs)
     })
   })
+
+  describe('#hydrateUtxos', () => {
+    it('should throw error if input is not an array.', async () => {
+      req.body.utxos = 'test'
+
+      const result = await slpRoute.hydrateUtxos(req, res)
+      // console.log(`result: `, result)
+
+      assert.hasAllKeys(result, ['error'])
+      assert.include(result.error, 'Input must be an array')
+    })
+
+    it('should throw error if Array is empty', async () => {
+      req.body.utxos = []
+
+      const result = await slpRoute.hydrateUtxos(req, res)
+
+      assert.hasAllKeys(result, ['error'])
+      assert.include(result.error, 'Array should not be empty')
+    })
+
+    it('should throw error if Array is too long', async () => {
+      const utxo = {
+        txid:
+          'bd158c564dd4ef54305b14f44f8e94c44b649f246dab14bcb42fb0d0078b8a90',
+        vout: 3,
+        amount: 0.00002015,
+        satoshis: 2015,
+        height: 594892,
+        confirmations: 5
+      }
+
+      const utxos = []
+
+      // Populate array with 21 utxos
+      for (let i = 0; i < 21; i++) {
+        utxos.push(utxo)
+      }
+
+      req.body.utxos = utxos
+
+      const result = await slpRoute.hydrateUtxos(req, res)
+
+      assert.hasAllKeys(result, ['error'])
+      assert.include(result.error, 'Array too long, max length is 20')
+    })
+
+    it('should return utxo details', async () => {
+      const utxos = [
+        {
+          txid:
+            'd56a2b446d8149c39ca7e06163fe8097168c3604915f631bc58777d669135a56',
+          vout: 3,
+          value: '6816',
+          height: 606848,
+          confirmations: 13,
+          satoshis: 6816
+        },
+        {
+          txid:
+            'd56a2b446d8149c39ca7e06163fe8097168c3604915f631bc58777d669135a56',
+          vout: 2,
+          value: '546',
+          height: 606848,
+          confirmations: 13,
+          satoshis: 546
+        }
+      ]
+
+      // Mock the external network call.
+      sandbox.stub(slpRoute.bchjs.SLP.Utils, 'tokenUtxoDetails').resolves([
+        {
+          txid:
+            'd56a2b446d8149c39ca7e06163fe8097168c3604915f631bc58777d669135a56',
+          vout: 3,
+          value: '6816',
+          height: 606848,
+          confirmations: 13,
+          satoshis: 6816,
+          isValid: false
+        },
+        {
+          txid:
+            'd56a2b446d8149c39ca7e06163fe8097168c3604915f631bc58777d669135a56',
+          vout: 2,
+          value: '546',
+          height: 606848,
+          confirmations: 13,
+          satoshis: 546,
+          utxoType: 'token',
+          transactionType: 'send',
+          tokenId:
+            'dd84ca78db4d617221b58eabc6667af8fe2f7eadbfcc213d35be9f1b419beb8d',
+          tokenTicker: 'TAP',
+          tokenName: 'Thoughts and Prayers',
+          tokenDocumentUrl: '',
+          tokenDocumentHash: '',
+          decimals: 0,
+          tokenType: 1,
+          tokenQty: 5,
+          isValid: true
+        }
+      ])
+
+      req.body.utxos = utxos
+      const result = await slpRoute.hydrateUtxos(req, res)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      // Test the general structure of the output.
+      assert.isArray(result.slpUtxos)
+      assert.equal(result.slpUtxos.length, 2)
+
+      // Test the non-slp UTXO.
+      assert.property(result.slpUtxos[0], 'txid')
+      assert.property(result.slpUtxos[0], 'vout')
+      assert.property(result.slpUtxos[0], 'value')
+      assert.property(result.slpUtxos[0], 'height')
+      assert.property(result.slpUtxos[0], 'confirmations')
+      assert.property(result.slpUtxos[0], 'satoshis')
+      assert.property(result.slpUtxos[0], 'isValid')
+      assert.equal(result.slpUtxos[0].isValid, false)
+
+      // Test the slp UTXO.
+      assert.property(result.slpUtxos[1], 'txid')
+      assert.property(result.slpUtxos[1], 'vout')
+      assert.property(result.slpUtxos[1], 'value')
+      assert.property(result.slpUtxos[1], 'height')
+      assert.property(result.slpUtxos[1], 'confirmations')
+      assert.property(result.slpUtxos[1], 'satoshis')
+      assert.property(result.slpUtxos[1], 'isValid')
+      assert.equal(result.slpUtxos[1].isValid, true)
+      assert.property(result.slpUtxos[1], 'transactionType')
+      assert.property(result.slpUtxos[1], 'tokenId')
+      assert.property(result.slpUtxos[1], 'tokenTicker')
+      assert.property(result.slpUtxos[1], 'tokenName')
+      assert.property(result.slpUtxos[1], 'tokenDocumentUrl')
+      assert.property(result.slpUtxos[1], 'tokenDocumentHash')
+      assert.property(result.slpUtxos[1], 'decimals')
+      assert.property(result.slpUtxos[1], 'tokenType')
+      assert.property(result.slpUtxos[1], 'tokenQty')
+    })
+  })
 })
 
 /*