Use buffer-reverse instead [].reverse.call

src/block.js

@@ -1,6 +1,7 @@
 var bufferutils = require('./bufferutils')
 var bcrypto = require('./crypto')
-var compare = require('buffer-compare')
+var bufferCompare = require('buffer-compare')
+var bufferReverse = require('buffer-reverse')
 
 var Transaction = require('./transaction')
 
@@ -71,7 +72,7 @@ Block.prototype.getHash = function () {
 }
 
 Block.prototype.getId = function () {
-  return [].reverse.call(this.getHash()).toString('hex')
+  return bufferReverse(this.getHash()).toString('hex')
 }
 
 Block.prototype.getUTCDate = function () {
@@ -133,10 +134,10 @@ Block.calculateTarget = function (bits) {
 }
 
 Block.prototype.checkProofOfWork = function () {
-  var hash = [].reverse.call(this.getHash())
+  var hash = bufferReverse(this.getHash())
   var target = Block.calculateTarget(this.bits)
 
-  return compare(hash, target) <= 0
+  return bufferCompare(hash, target) <= 0
 }
 
 module.exports = Block

src/transaction.js

@@ -1,6 +1,7 @@
 var bcrypto = require('./crypto')
 var bscript = require('./script')
 var bufferutils = require('./bufferutils')
+var bufferReverse = require('buffer-reverse')
 var opcodes = require('./opcodes')
 var typeforce = require('typeforce')
 var types = require('./types')
@@ -247,7 +248,7 @@ Transaction.prototype.getHash = function () {
 
 Transaction.prototype.getId = function () {
   // transaction hash's are displayed in reverse order
-  return [].reverse.call(this.getHash()).toString('hex')
+  return bufferReverse(this.getHash()).toString('hex')
 }
 
 Transaction.prototype.toBuffer = function () {

src/transaction_builder.js

@@ -2,6 +2,7 @@ var baddress = require('./address')
 var bcrypto = require('./crypto')
 var bscript = require('./script')
 var bufferEquals = require('buffer-equals')
+var bufferReverse = require('buffer-reverse')
 var networks = require('./networks')
 var ops = require('./opcodes')
 var typeforce = require('typeforce')
@@ -198,7 +199,7 @@ TransactionBuilder.prototype.addInput = function (txHash, vout, sequence, prevOu
   // is it a hex string?
   if (typeof txHash === 'string') {
     // transaction hashs's are displayed in reverse order, un-reverse it
-    txHash = [].reverse.call(new Buffer(txHash, 'hex'))
+    txHash = bufferReverse(new Buffer(txHash, 'hex'))
 
   // is it a Transaction object?
   } else if (txHash instanceof Transaction) {