Use native assert

lib/address.js

@@ -5,11 +5,11 @@
 
 "use strict";
 
+var assert = require("assert");
 var bufferEqual = require("buffer-equal");
 var bs58 = require("bs58");
 var varint = require("./varint");
 var bmcrypto = require("./crypto");
-var assert = require("./utils").assert;
 
 /**
  * Parse Bitmessage Base58 encoded address (with or without `BM-`

lib/crypto.browser.js

@@ -10,9 +10,9 @@
 
 "use strict";
 
+var assert = require("assert");
 require("es6-promise").polyfill();
 var ripemd160 = require("ripemd160");
-var assert = require("./utils").assert;
 
 // Support `webkit` prefix for Safari (not tested yet).
 // TODO(Kagami): Try to support IE11.

lib/utils.js

@@ -1,7 +0,0 @@
-"use strict";
-
-exports.assert = function(condition, message) {
-  if (!condition) {
-    throw new Error(message || "Assertion failed");
-  }
-};

lib/varint.js

@@ -5,12 +5,12 @@
 
 "use strict";
 
+var assert = require("assert");
 // TODO(Kagami): Since `node-int64` and `int64-native` APIs are slightly
 // differ, there might be need in platform-dependent wrapper. Also think
 // that to do with 64bit arithmetic since `node-int64` doesn't implement
 // it.
 var Int64 = require("int64-native");
-var assert = require("./utils").assert;
 
 exports.decode = function(buf) {
   assert(buf.length > 0, "Empty buffer");