poll address unspent until non-empty or timeout

Author: weilu

test/integration/advanced.js

@@ -4,6 +4,7 @@ var assert = require('assert')
 var bitcoin = require('../../')
 var blockchain = new (require('cb-insight'))('https://test-insight.bitpay.com')
 var faucetWithdraw = require('./utils').faucetWithdraw
+var pollUnspent = require('./utils').pollUnspent
 
 describe('bitcoinjs-lib (advanced)', function () {
   it('can sign a Bitcoin message', function () {
@@ -33,7 +34,7 @@ describe('bitcoinjs-lib (advanced)', function () {
     faucetWithdraw(address, 2e4, function (err) {
       if (err) return done(err)
 
-      blockchain.addresses.unspents(address, function (err, unspents) {
+      pollUnspent(blockchain, address, function (err, unspents) {
         if (err) return done(err)
 
         var tx = new bitcoin.TransactionBuilder()

test/integration/multisig.js

@@ -4,6 +4,7 @@ var assert = require('assert')
 var bitcoin = require('../../')
 var blockchain = new (require('cb-insight'))('https://test-insight.bitpay.com')
 var faucetWithdraw = require('./utils').faucetWithdraw
+var pollUnspent = require('./utils').pollUnspent
 
 describe('bitcoinjs-lib (multisig)', function () {
   it('can create a 2-of-3 multisig P2SH address', function () {
@@ -42,7 +43,7 @@ describe('bitcoinjs-lib (multisig)', function () {
       if (err) return done(err)
 
       // get latest unspents from the address
-      blockchain.addresses.unspents(address, function (err, unspents) {
+      pollUnspent(blockchain, address, function (err, unspents) {
         if (err) return done(err)
 
           // filter small unspents

test/integration/utils.js

@@ -7,6 +7,22 @@ function faucetWithdraw(address, amount, done) {
   }).on('error', done)
 }
 
+function pollUnspent(blockchain, address, done) {
+  blockchain.addresses.unspents(address, function (err, unspents) {
+    if (err) return done(err)
+
+    if(unspents == null || unspents.length === 0) {
+      return setTimeout(function() {
+        pollUnspent(blockchain, address, done)
+      }, 200)
+    }
+
+    done(null, unspents)
+  })
+
+}
+
 module.exports = {
-  faucetWithdraw: faucetWithdraw
+  faucetWithdraw: faucetWithdraw,
+  pollUnspent: pollUnspent
 }