Address: remove Address.Error

By removing Address.Error, we remove a code smell.
This part of the code base was also not under any form of test.
Test data and tests have therefore been added verifying its behaviour in
both Wallet and Address tests.

src/address.js

@@ -26,13 +26,6 @@ function Address(hash, version) {
   this.version = version
 }
 
-Address.Error = function(message) {
-  this.name = 'AddressError'
-  this.message = message
-}
-Address.Error.prototype = new Error()
-Address.Error.prototype.constructor = Address.Error
-
 // Import functions
 Address.fromBase58Check = function(string) {
   var decode = base58check.decode(string)
@@ -53,7 +46,7 @@ Address.fromScriptPubKey = function(script, network) {
     return new Address(new Buffer(script.chunks[1]), network.scriptHash)
   }
 
-  throw new Address.Error(type + ' has no matching Address')
+  assert(false, type + ' has no matching Address')
 }
 
 // Export functions
@@ -72,7 +65,7 @@ Address.prototype.toScriptPubKey = function() {
     return Script.createP2SHScriptPubKey(this.hash)
   }
 
-  throw new Address.Error(this + ' has no matching script')
+  assert(false, this.toString() + ' has no matching script')
 }
 
 Address.prototype.toString = Address.prototype.toBase58Check

src/wallet.js

@@ -155,7 +155,7 @@ function Wallet(seed, options) {
       try {
         address = Address.fromScriptPubKey(txOut.script, networks[network]).toString()
       } catch(e) {
-        if (!(e instanceof Address.Error)) throw e
+        if (!(e.message.match(/has no matching Address/))) throw e
       }
 
       if (isMyAddress(address)) {