Merge pull request #1125 from chaotixkilla/feat-digest-auth-request-queueing

Add digest auth request queueing

lib/plugins/common/json-rpc.js

@@ -4,6 +4,7 @@ const uuid = require('uuid')
 const fs = require('fs')
 const _ = require('lodash/fp')
 const request = require('request-promise')
+const Queue = require('queue-promise')
 const { utils: coinUtils } = require('@lamassu/coins')
 
 const options = require('../../options')
@@ -11,7 +12,7 @@ const options = require('../../options')
 const blockchainDir = options.blockchainDir
 
 module.exports = {
-  fetch, fetchDigest, parseConf, rpcConfig
+  fetch, fetchDigest, createDigestRequest, parseConf, rpcConfig
 }
 
 function fetch (account = {}, method, params) {
@@ -49,31 +50,47 @@ function fetch (account = {}, method, params) {
     })
 }
 
+const DIGEST_QUEUE = new Queue({
+  concurrent: 1,
+  interval: 100,
+  start: false
+})
+
+function createDigestRequest (account = {}, method, params = []) {
+  DIGEST_QUEUE.enqueue(() => fetchDigest(account, method, params))
+  return DIGEST_QUEUE.dequeue()
+}
+
+function generateDigestOptions (account = {}, method, params) {
+  const headers = {
+    'Content-Type': 'application/json'
+  }
+
+  const dataString = `{"jsonrpc":"2.0","id":"${uuid.v4()}","method":"${method}","params":${JSON.stringify(params)}}`
+
+  const options = {
+    url: `http://localhost:${account.port}/json_rpc`,
+    method: 'POST',
+    headers,
+    body: dataString,
+    forever: true,
+    auth: {
+      user: account.username,
+      pass: account.password,
+      sendImmediately: false
+    }
+  }
+
+  return options
+}
+
 function fetchDigest(account = {}, method, params = []) {
   return Promise.resolve(true)
     .then(() => {
       if (_.isNil(account.port))
         throw new Error('port attribute required for jsonRpc')
 
-      const headers = {
+      const options = generateDigestOptions(account, method, params)
-        'Content-Type': 'application/json'
-      }
-
-      const dataString = `{"jsonrpc":"2.0","id":"${uuid.v4()}","method":"${method}","params":${JSON.stringify(params)}}`
-
-      const options = {
-        url: `http://localhost:${account.port}/json_rpc`,
-        method: 'POST',
-        headers,
-        body: dataString,
-        forever: true,
-        auth: {
-          user: account.username,
-          pass: account.password,
-          sendImmediately: false
-        }
-      }
-
       return request(options)
     })
     .then((res) => {

lib/plugins/wallet/monerod/monerod.js

@@ -15,7 +15,6 @@ const blockchainDir = options.blockchainDir
 const cryptoRec = utils.getCryptoCurrency(COINS.XMR)
 const configPath = utils.configPath(cryptoRec, blockchainDir)
 const walletDir = path.resolve(utils.cryptoDir(cryptoRec, blockchainDir), 'wallets')
-const unitScale = cryptoRec.unitScale
 
 function rpcConfig () {
   try {
@@ -31,7 +30,7 @@ function rpcConfig () {
 }
 
 function fetch (method, params) {
-  return jsonRpc.fetchDigest(rpcConfig(), method, params)
+  return jsonRpc.createDigestRequest(rpcConfig(), method, params)
 }
 
 function handleError (error, method) {
@@ -151,16 +150,11 @@ function getStatus (account, tx, requested, settings, operatorId) {
 function newFunding (account, cryptoCode, settings, operatorId) {
   return checkCryptoCode(cryptoCode)
     .then(() => refreshWallet())
-    .then(() => fetch('get_balance', { account_index: 0, address_indices: [0] }))
+    .then(() => Promise.all([
-    .then(balanceRes => Promise.all([
+      fetch('get_balance', { account_index: 0, address_indices: [0] }),
-        balanceRes,
+      fetch('create_address', { account_index: 0 }),
-        fetch('create_address', { account_index: 0 })
+      fetch('get_transfers', { pool: true, account_index: 0 })
-      ]))
+    ]))
-    .then(([balanceRes, addressRes]) => Promise.all([
-        balanceRes,
-        addressRes,
-        fetch('get_transfers', { pool: true, account_index: 0 })
-      ]))
     .then(([balanceRes, addressRes, transferRes]) => {
       const memPoolBalance = _.reduce((acc, value) => acc.plus(value.amount), BN(0), transferRes.pool)
       return {