integration tests: refactor helloblock P2SH spending test

test/integration/helloblock.js

@@ -0,0 +1,68 @@
+var assert = require('assert')
+
+var bitcoin = require('../../')
+var networks = bitcoin.networks
+var scripts = bitcoin.scripts
+
+var Address = bitcoin.Address
+var ECKey = bitcoin.ECKey
+var TransactionBuilder = bitcoin.TransactionBuilder
+
+var helloblock = require('helloblock-js')({
+  network: 'testnet'
+})
+
+describe('bitcoinjs-lib (helloblock)', function() {
+  this.timeout(20000)
+
+  it('can spend from a 2-of-2 address', function(done) {
+    var privKeys = [
+      '91avARGdfge8E4tZfYLoxeJ5sGBdNJQH4kvjJoQFacbgwmaKkrx',
+      '91avARGdfge8E4tZfYLoxeJ5sGBdNJQH4kvjJoQFacbgww7vXtT'
+    ].map(ECKey.fromWIF)
+    var pubKeys = privKeys.map(function(x) { return x.pub })
+
+    var redeemScript = scripts.multisigOutput(2, pubKeys)
+    var scriptPubKey = scripts.scriptHashOutput(redeemScript.getHash())
+    var p2shAddress = Address.fromOutputScript(scriptPubKey, networks.testnet).toString()
+
+    // Attempt to send funds to the source address
+    helloblock.faucet.withdraw(p2shAddress, 2e4, function(err) {
+      if (err) return done(err)
+
+      // get latest unspents from the p2shAddress
+      helloblock.addresses.getUnspents(p2shAddress, function(err, res, unspents) {
+        if (err) return done(err)
+
+        // use the oldest unspent
+        var unspent = unspents[unspents.length - 1]
+        var spendAmount = Math.min(unspent.value, 1e4)
+
+        // make a random destination address
+        var targetAddress = ECKey.makeRandom().pub.getAddress(networks.testnet).toString()
+
+        var txb = new TransactionBuilder()
+        txb.addInput(unspent.txHash, unspent.index)
+        txb.addOutput(targetAddress, spendAmount)
+
+        privKeys.forEach(function(privKey) {
+          txb.sign(0, privKey, redeemScript)
+        })
+
+        // broadcast our transaction
+        helloblock.transactions.propagate(txb.build().toHex(), function(err) {
+          // no err means that the transaction has been successfully propagated
+          if (err) return done(err)
+
+          // check that the funds (spendAmount Satoshis) indeed arrived at the intended address
+          helloblock.addresses.get(targetAddress, function(err, res, addrInfo) {
+            if (err) return done(err)
+
+            assert.equal(addrInfo.balance, spendAmount)
+            done()
+          })
+        })
+      })
+    })
+  })
+})