bch-api/src/routes/v4/xpub.js

/*
  xpub route
*/

'use strict'

const express = require('express')

const RouteUtils = require('../../util/route-utils')
const routeUtils = new RouteUtils()

const wlogger = require('../../util/winston-logging')

// const router = express.Router()
const router = express.Router()

// Used for processing error messages before sending them to the user.
const util = require('util')
util.inspect.defaultOptions = { depth: 1 }

const BCHJS = require('@psf/bch-js')
const bchjs = new BCHJS()

// Connect the route endpoints to their handler functions.
router.get('/', root)
router.get('/fromXPub/:xpub', fromXPubSingle)

// Root API endpoint. Simply acknowledges that it exists.
function root (req, res, next) {
  return res.json({ status: 'address' })
}

async function fromXPubSingle (req, res, next) {
  try {
    const xpub = req.params.xpub
    const hdPath = req.query.hdPath ? req.query.hdPath : '0'

    if (!xpub || xpub === '') {
      res.status(400)
      return res.json({ error: 'xpub can not be empty' })
    }

    // Reject if xpub is an array.
    if (Array.isArray(xpub)) {
      res.status(400)
      return res.json({
        error: 'xpub can not be an array. Use POST for bulk upload.'
      })
    }

    wlogger.debug('Executing address/fromXPub with this xpub: ', xpub)

    const cashAddr = bchjs.Address.fromXPub(xpub, hdPath)
    const legacyAddr = bchjs.Address.toLegacyAddress(cashAddr)
    res.status(200)
    return res.json({
      cashAddress: cashAddr,
      legacyAddress: legacyAddr
    })
  } catch (err) {
    // Attempt to decode the error message.
    const { msg, status } = routeUtils.decodeError(err)
    if (msg) {
      res.status(status)
      return res.json({ error: msg })
    }

    // Write out error to error log.
    wlogger.error('Error in address.ts/fromXPubSingle().', err)

    res.status(500)
    return res.json({ error: util.inspect(err) })
  }
}

module.exports = {
  router,
  testableComponents: {
    root,
    fromXPubSingle
  }
}