diff --git a/src/js/amount.js b/src/js/amount.js
index b24ff0397b..7614e48721 100644
--- a/src/js/amount.js
+++ b/src/js/amount.js
@@ -3,27 +3,18 @@
 
 var sjcl    = require('../../build/sjcl');
 var bn	    = sjcl.bn;
-var utils   = require('./utils.js');
-var jsbn    = require('./jsbn.js');
+var utils   = require('./utils');
+var jsbn    = require('./jsbn');
 
-var BigInteger	= jsbn.BigInteger;
-var nbi		= jsbn.nbi;
+var BigInteger = jsbn.BigInteger;
 
-var alphabets	= {
-   'ripple' : "rpshnaf39wBUDNEGHJKLM4PQRST7VWXYZ2bcdeCg65jkm8oFqi1tuvAxyz",
-   'tipple' : "RPShNAF39wBUDnEGHJKLM4pQrsT7VWXYZ2bcdeCg65jkm8ofqi1tuvaxyz",
-  'bitcoin' : "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
-};
+var UInt160  = require('./uint160').UInt160,
+    Seed     = require('./seed').Seed,
+    Currency = require('./currency').Currency;
 
 var consts = exports.consts = {
-  'address_xns'	          : "rrrrrrrrrrrrrrrrrrrrrhoLvTp",
-  'address_one'	          : "rrrrrrrrrrrrrrrrrrrrBZbvji",
   'currency_xns'          : 0,
   'currency_one'          : 1,
-  'uint160_xns'	          : utils.hexToString("0000000000000000000000000000000000000000"),
-  'uint160_one'	          : utils.hexToString("0000000000000000000000000000000000000001"),
-  'hex_xns'	          : "0000000000000000000000000000000000000000",
-  'hex_one'	          : "0000000000000000000000000000000000000001",
   'xns_precision'         : 6,
 
   // BigInteger values prefixed with bi_.
@@ -42,421 +33,8 @@ var consts = exports.consts = {
 
   'cMinOffset'            : -96,
   'cMaxOffset'            : 80,
-
-  'VER_NONE'              : 1,
-  'VER_NODE_PUBLIC'       : 28,
-  'VER_NODE_PRIVATE'      : 32,
-  'VER_ACCOUNT_ID'        : 0,
-  'VER_ACCOUNT_PUBLIC'    : 35,
-  'VER_ACCOUNT_PRIVATE'   : 34,
-  'VER_FAMILY_GENERATOR'  : 41,
-  'VER_FAMILY_SEED'       : 33,
 };
 
-// --> input: big-endian array of bytes.
-// <-- string at least as long as input.
-var encode_base = function (input, alphabet) {
-  var alphabet	= alphabets[alphabet || 'ripple'];
-  var bi_base	= new BigInteger(String(alphabet.length));
-  var bi_q	= nbi();
-  var bi_r	= nbi();
-  var bi_value	= new BigInteger(input);
-  var buffer	= [];
-
-  while (bi_value.compareTo(BigInteger.ZERO) > 0)
-  {
-    bi_value.divRemTo(bi_base, bi_q, bi_r);
-    bi_q.copyTo(bi_value);
-
-    buffer.push(alphabet[bi_r.intValue()]);
-  }
-
-  var i;
-
-  for (i = 0; i != input.length && !input[i]; i += 1) {
-    buffer.push(alphabet[0]);
-  }
-
-  return buffer.reverse().join("");
-};
-
-// --> input: String
-// <-- array of bytes or undefined.
-var decode_base = function (input, alphabet) {
-  var alphabet	= alphabets[alphabet || 'ripple'];
-  var bi_base	= new BigInteger(String(alphabet.length));
-  var bi_value	= nbi();
-  var i;
-
-  for (i = 0; i != input.length && input[i] === alphabet[0]; i += 1)
-    ;
-
-  for (; i != input.length; i += 1) {
-    var	v = alphabet.indexOf(input[i]);
-
-    if (v < 0)
-      return undefined;
-
-    var r = nbi();
-
-    r.fromInt(v);
-
-    bi_value  = bi_value.multiply(bi_base).add(r);
-  }
-
-  // toByteArray:
-  // - Returns leading zeros!
-  // - Returns signed bytes!
-  var bytes =  bi_value.toByteArray().map(function (b) { return b ? b < 0 ? 256+b : b : 0});
-  var extra = 0;
-
-  while (extra != bytes.length && !bytes[extra])
-    extra += 1;
-
-  if (extra)
-    bytes = bytes.slice(extra);
-
-  var zeros = 0;
-
-  while (zeros !== input.length && input[zeros] === alphabet[0])
-    zeros += 1;
-
-  return [].concat(utils.arraySet(zeros, 0), bytes);
-};
-
-var sha256  = function (bytes) {
-  return sjcl.codec.bytes.fromBits(sjcl.hash.sha256.hash(sjcl.codec.bytes.toBits(bytes)));
-};
-
-var sha256hash = function (bytes) {
-  return sha256(sha256(bytes));
-};
-
-// --> input: Array
-// <-- String
-var encode_base_check = function (version, input, alphabet) {
-  var buffer  = [].concat(version, input);
-  var check   = sha256(sha256(buffer)).slice(0, 4);
-
-  return encode_base([].concat(buffer, check), alphabet);
-}
-
-// --> input : String
-// <-- NaN || BigInteger
-var decode_base_check = function (version, input, alphabet) {
-  var buffer = decode_base(input, alphabet);
-
-  if (!buffer || buffer[0] !== version || buffer.length < 5)
-    return NaN;
-
-  var computed	= sha256hash(buffer.slice(0, -4)).slice(0, 4);
-  var checksum	= buffer.slice(-4);
-  var i;
-
-  for (i = 0; i != 4; i += 1)
-    if (computed[i] !== checksum[i])
-      return NaN;
-
-  return new BigInteger(buffer.slice(1, -4));
-}
-
-//
-// Seed support
-//
-
-var Seed = function () {
-  // Internal form: NaN or BigInteger
-  this._value  = NaN;
-};
-
-Seed.json_rewrite = function (j) {
-  return Seed.from_json(j).to_json();
-};
-
-// Return a new Seed from j.
-Seed.from_json = function (j) {
-  return 'string' === typeof j
-      ? (new Seed()).parse_json(j)
-      : j.clone();
-};
-
-Seed.is_valid = function (j) {
-  return Seed.from_json(j).is_valid();
-};
-
-Seed.prototype.clone = function () {
-  return this.copyTo(new Seed());
-};
-
-// Returns copy.
-Seed.prototype.copyTo = function (d) {
-  d._value = this._value;
-
-  return d;
-};
-
-Seed.prototype.equals = function (d) {
-  return this._value instanceof BigInteger && d._value instanceof BigInteger && this._value.equals(d._value);
-};
-
-Seed.prototype.is_valid = function () {
-  return this._value instanceof BigInteger;
-};
-
-// value = NaN on error.
-// One day this will support rfc1751 too.
-Seed.prototype.parse_json = function (j) {
-  if ('string' !== typeof j) {
-    this._value  = NaN;
-  }
-  else if (j[0] === "s") {
-    this._value  = decode_base_check(consts.VER_FAMILY_SEED, j);
-  }
-  else if (16 === j.length) {
-    this._value  = new BigInteger(utils.stringToArray(j), 128);
-  }
-  else {
-    this._value  = NaN;
-  }
-
-  return this;
-};
-
-// Convert from internal form.
-Seed.prototype.to_json = function () {
-  if (!(this._value instanceof BigInteger))
-    return NaN;
-
-  var bytes   = this._value.toByteArray().map(function (b) { return b ? b < 0 ? 256+b : b : 0});
-  var target  = 20;
-
-  // XXX Make sure only trim off leading zeros.
-  var array = bytes.length < target
-		? bytes.length
-		  ? [].concat(utils.arraySet(target - bytes.length, 0), bytes)
-		  : utils.arraySet(target, 0)
-		: bytes.slice(target - bytes.length);
-  var output = encode_base_check(consts.VER_FAMILY_SEED, array);
-
-  return output;
-};
-
-//
-// UInt160 support
-//
-
-var UInt160 = function () {
-  // Internal form: NaN or BigInteger
-  this._value  = NaN;
-};
-
-UInt160.json_rewrite = function (j) {
-  return UInt160.from_json(j).to_json();
-};
-
-// Return a new UInt160 from j.
-UInt160.from_generic = function (j) {
-  return 'string' === typeof j
-      ? (new UInt160()).parse_generic(j)
-      : j.clone();
-};
-
-// Return a new UInt160 from j.
-UInt160.from_json = function (j) {
-  if ('string' === typeof j) {
-    return (new UInt160()).parse_json(j);
-  } else if (j instanceof UInt160) {
-    return j.clone();
-  } else {
-    return new UInt160();
-  }
-};
-
-UInt160.is_valid = function (j) {
-  return UInt160.from_json(j).is_valid();
-};
-
-UInt160.prototype.clone = function () {
-  return this.copyTo(new UInt160());
-};
-
-// Returns copy.
-UInt160.prototype.copyTo = function (d) {
-  d._value = this._value;
-
-  return d;
-};
-
-UInt160.prototype.equals = function (d) {
-  return this._value instanceof BigInteger && d._value instanceof BigInteger && this._value.equals(d._value);
-};
-
-UInt160.prototype.is_valid = function () {
-  return this._value instanceof BigInteger;
-};
-
-// value = NaN on error.
-UInt160.prototype.parse_generic = function (j) {
-  // Canonicalize and validate
-  if (exports.config.accounts && j in exports.config.accounts)
-    j = exports.config.accounts[j].account;
-
-  switch (j) {
-    case undefined:
-    case "0":
-    case consts.address_xns:
-    case consts.uint160_xns:
-    case consts.hex_xns:
-      this._value  = nbi();
-      break;
-
-    case "1":
-    case consts.address_one:
-    case consts.uint160_one:
-    case consts.hex_one:
-      this._value  = new BigInteger([1]);
-
-      break;
-
-    default:
-      if ('string' !== typeof j) {
-	this._value  = NaN;
-      }
-      else if (j[0] === "r") {
-	this._value  = decode_base_check(consts.VER_ACCOUNT_ID, j);
-      }
-      else if (20 === j.length) {
-	this._value  = new BigInteger(utils.stringToArray(j), 256);
-      }
-      else if (40 === j.length) {
-	// XXX Check char set!
-	this._value  = new BigInteger(j, 16);
-      }
-      else {
-	this._value  = NaN;
-      }
-  }
-
-  return this;
-};
-
-// value = NaN on error.
-UInt160.prototype.parse_json = function (j) {
-  // Canonicalize and validate
-  if (exports.config.accounts && j in exports.config.accounts)
-    j = exports.config.accounts[j].account;
-
-  if ('string' !== typeof j) {
-    this._value  = NaN;
-  }
-  else if (j[0] === "r") {
-    this._value  = decode_base_check(consts.VER_ACCOUNT_ID, j);
-  }
-  else {
-    this._value  = NaN;
-  }
-
-  return this;
-};
-
-// Convert from internal form.
-// XXX Json form should allow 0 and 1, C++ doesn't currently allow it.
-UInt160.prototype.to_json = function () {
-  if (!(this._value instanceof BigInteger))
-    return NaN;
-
-  var bytes   = this._value.toByteArray().map(function (b) { return b ? b < 0 ? 256+b : b : 0});
-  var target  = 20;
-
-  // XXX Make sure only trim off leading zeros.
-  var array = bytes.length < target
-		? bytes.length
-		  ? [].concat(utils.arraySet(target - bytes.length, 0), bytes)
-		  : utils.arraySet(target, 0)
-		: bytes.slice(target - bytes.length);
-  var output = encode_base_check(consts.VER_ACCOUNT_ID, array);
-
-  return output;
-};
-
-//
-// Currency support
-//
-
-// XXX Internal form should be UInt160.
-var Currency = function () {
-  // Internal form: 0 = XRP. 3 letter-code.
-  // XXX Internal should be 0 or hex with three letter annotation when valid.
-
-  // Json form:
-  //  '', 'XRP', '0': 0
-  //  3-letter code: ...
-  // XXX Should support hex, C++ doesn't currently allow it.
-
-  this._value  = NaN;
-}
-
-// Given "USD" return the json.
-Currency.json_rewrite = function (j) {
-  return Currency.from_json(j).to_json();
-};
-
-Currency.from_json = function (j) {
-  return 'string' === typeof j
-      ? (new Currency()).parse_json(j)
-      : j.clone();
-};
-
-Currency.is_valid = function (j) {
-  return currency.from_json(j).is_valid();
-};
-
-Currency.prototype.clone = function() {
-  return this.copyTo(new Currency());
-};
-
-// Returns copy.
-Currency.prototype.copyTo = function (d) {
-  d._value = this._value;
-
-  return d;
-};
-
-Currency.prototype.equals = function (d) {
-  return ('string' !== typeof this._value && isNaN(this._value))
-    || ('string' !== typeof d._value && isNaN(d._value)) ? false : this._value === d._value;
-};
-
-// this._value = NaN on error.
-Currency.prototype.parse_json = function (j) {
-  if ("" === j || "0" === j || "XRP" === j) {
-    this._value	= 0;
-  }
-  else if ('string' != typeof j || 3 !== j.length) {
-    this._value	= NaN;
-  }
-  else {
-    this._value	= j;
-  }
-
-  return this;
-};
-
-Currency.prototype.is_native = function () {
-  return !isNaN(this._value) && !this._value;
-};
-
-Currency.prototype.is_valid = function () {
-  return !isNaN(this._value);
-};
-
-Currency.prototype.to_json = function () {
-  return this._value ? this._value : "XRP";
-};
-
-Currency.prototype.to_human = function () {
-  return this._value ? this._value : "XRP";
-};
 
 //
 // Amount class in the style of Java's BigInteger class
@@ -505,9 +83,9 @@ Amount.is_valid_full = function (j) {
 
 Amount.NaN = function () {
   var result = new Amount();
-  
+
   result._value = NaN;
-  
+
   return result;
 };
 
@@ -1305,10 +883,10 @@ Amount.prototype.not_equals_why = function (d) {
 };
 
 exports.Amount	      = Amount;
+
+// DEPRECATED: Include the corresponding files instead.
 exports.Currency      = Currency;
 exports.Seed          = Seed;
 exports.UInt160	      = UInt160;
 
-exports.config	      = {};
-
 // vim:sw=2:sts=2:ts=8:et
diff --git a/src/js/base.js b/src/js/base.js
new file mode 100644
index 0000000000..47ef551ed0
--- /dev/null
+++ b/src/js/base.js
@@ -0,0 +1,136 @@
+
+var sjcl    = require('../../build/sjcl');
+var utils   = require('./utils');
+var jsbn    = require('./jsbn');
+var extend  = require('extend');
+
+var BigInteger = jsbn.BigInteger;
+var nbi        = jsbn.nbi;
+
+var Base = {};
+
+var alphabets	= Base.alphabets = {
+  'ripple'  : "rpshnaf39wBUDNEGHJKLM4PQRST7VWXYZ2bcdeCg65jkm8oFqi1tuvAxyz",
+  'tipple'  : "RPShNAF39wBUDnEGHJKLM4pQrsT7VWXYZ2bcdeCg65jkm8ofqi1tuvaxyz",
+  'bitcoin' : "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
+};
+
+extend(Base, {
+  'VER_NONE'              : 1,
+  'VER_NODE_PUBLIC'       : 28,
+  'VER_NODE_PRIVATE'      : 32,
+  'VER_ACCOUNT_ID'        : 0,
+  'VER_ACCOUNT_PUBLIC'    : 35,
+  'VER_ACCOUNT_PRIVATE'   : 34,
+  'VER_FAMILY_GENERATOR'  : 41,
+  'VER_FAMILY_SEED'       : 33
+});
+
+var sha256  = function (bytes) {
+  return sjcl.codec.bytes.fromBits(sjcl.hash.sha256.hash(sjcl.codec.bytes.toBits(bytes)));
+};
+
+var sha256hash = function (bytes) {
+  return sha256(sha256(bytes));
+};
+
+// --> input: big-endian array of bytes.
+// <-- string at least as long as input.
+Base.encode = function (input, alpha) {
+  var alphabet	= alphabets[alpha || 'ripple'];
+  var bi_base	= new BigInteger(String(alphabet.length));
+  var bi_q	= nbi();
+  var bi_r	= nbi();
+  var bi_value	= new BigInteger(input);
+  var buffer	= [];
+
+  while (bi_value.compareTo(BigInteger.ZERO) > 0)
+  {
+    bi_value.divRemTo(bi_base, bi_q, bi_r);
+    bi_q.copyTo(bi_value);
+
+    buffer.push(alphabet[bi_r.intValue()]);
+  }
+
+  var i;
+
+  for (i = 0; i != input.length && !input[i]; i += 1) {
+    buffer.push(alphabet[0]);
+  }
+
+  return buffer.reverse().join("");
+};
+
+// --> input: String
+// <-- array of bytes or undefined.
+Base.decode = function (input, alpha) {
+  var alphabet	= alphabets[alpha || 'ripple'];
+  var bi_base	= new BigInteger(String(alphabet.length));
+  var bi_value	= nbi();
+  var i;
+
+  for (i = 0; i != input.length && input[i] === alphabet[0]; i += 1)
+    ;
+
+  for (; i != input.length; i += 1) {
+    var	v = alphabet.indexOf(input[i]);
+
+    if (v < 0)
+      return undefined;
+
+    var r = nbi();
+
+    r.fromInt(v);
+
+    bi_value  = bi_value.multiply(bi_base).add(r);
+  }
+
+  // toByteArray:
+  // - Returns leading zeros!
+  // - Returns signed bytes!
+  var bytes =  bi_value.toByteArray().map(function (b) { return b ? b < 0 ? 256+b : b : 0; });
+  var extra = 0;
+
+  while (extra != bytes.length && !bytes[extra])
+    extra += 1;
+
+  if (extra)
+    bytes = bytes.slice(extra);
+
+  var zeros = 0;
+
+  while (zeros !== input.length && input[zeros] === alphabet[0])
+    zeros += 1;
+
+  return [].concat(utils.arraySet(zeros, 0), bytes);
+};
+
+// --> input: Array
+// <-- String
+Base.encode_check = function (version, input, alphabet) {
+  var buffer  = [].concat(version, input);
+  var check   = sha256(sha256(buffer)).slice(0, 4);
+
+  return Base.encode([].concat(buffer, check), alphabet);
+}
+
+// --> input : String
+// <-- NaN || BigInteger
+Base.decode_check = function (version, input, alphabet) {
+  var buffer = Base.decode(input, alphabet);
+
+  if (!buffer || buffer[0] !== version || buffer.length < 5)
+    return NaN;
+
+  var computed	= sha256hash(buffer.slice(0, -4)).slice(0, 4);
+  var checksum	= buffer.slice(-4);
+  var i;
+
+  for (i = 0; i != 4; i += 1)
+    if (computed[i] !== checksum[i])
+      return NaN;
+
+  return new BigInteger(buffer.slice(1, -4));
+}
+
+exports.Base = Base;
diff --git a/src/js/config.js b/src/js/config.js
new file mode 100644
index 0000000000..372b7d261e
--- /dev/null
+++ b/src/js/config.js
@@ -0,0 +1,3 @@
+// This object serves as a singleton to store config options
+
+module.exports = {};
diff --git a/src/js/currency.js b/src/js/currency.js
new file mode 100644
index 0000000000..14e902159d
--- /dev/null
+++ b/src/js/currency.js
@@ -0,0 +1,81 @@
+
+//
+// Currency support
+//
+
+// XXX Internal form should be UInt160.
+var Currency = function () {
+  // Internal form: 0 = XRP. 3 letter-code.
+  // XXX Internal should be 0 or hex with three letter annotation when valid.
+
+  // Json form:
+  //  '', 'XRP', '0': 0
+  //  3-letter code: ...
+  // XXX Should support hex, C++ doesn't currently allow it.
+
+  this._value  = NaN;
+}
+
+// Given "USD" return the json.
+Currency.json_rewrite = function (j) {
+  return Currency.from_json(j).to_json();
+};
+
+Currency.from_json = function (j) {
+  return 'string' === typeof j
+      ? (new Currency()).parse_json(j)
+      : j.clone();
+};
+
+Currency.is_valid = function (j) {
+  return Currency.from_json(j).is_valid();
+};
+
+Currency.prototype.clone = function() {
+  return this.copyTo(new Currency());
+};
+
+// Returns copy.
+Currency.prototype.copyTo = function (d) {
+  d._value = this._value;
+
+  return d;
+};
+
+Currency.prototype.equals = function (d) {
+  return ('string' !== typeof this._value && isNaN(this._value))
+    || ('string' !== typeof d._value && isNaN(d._value)) ? false : this._value === d._value;
+};
+
+// this._value = NaN on error.
+Currency.prototype.parse_json = function (j) {
+  if ("" === j || "0" === j || "XRP" === j) {
+    this._value	= 0;
+  }
+  else if ('string' != typeof j || 3 !== j.length) {
+    this._value	= NaN;
+  }
+  else {
+    this._value	= j;
+  }
+
+  return this;
+};
+
+Currency.prototype.is_native = function () {
+  return !isNaN(this._value) && !this._value;
+};
+
+Currency.prototype.is_valid = function () {
+  return !isNaN(this._value);
+};
+
+Currency.prototype.to_json = function () {
+  return this._value ? this._value : "XRP";
+};
+
+Currency.prototype.to_human = function () {
+  return this._value ? this._value : "XRP";
+};
+
+exports.Currency = Currency;
diff --git a/src/js/remote.js b/src/js/remote.js
index 5832cced38..f34ed32878 100644
--- a/src/js/remote.js
+++ b/src/js/remote.js
@@ -22,6 +22,7 @@ var UInt160       = require('./amount').UInt160;
 var Transaction   = require('./transaction').Transaction;
 
 var utils         = require('./utils');
+var config        = require('./config');
 
 // Request events emitted:
 // 'success' : Request successful.
@@ -272,12 +273,12 @@ var Remote = function (opts, trace) {
 Remote.prototype      = new EventEmitter;
 
 Remote.from_config = function (obj, trace) {
-  var serverConfig = 'string' === typeof obj ? exports.config.servers[obj] : obj;
+  var serverConfig = 'string' === typeof obj ? config.servers[obj] : obj;
 
   var remote = new Remote(serverConfig, trace);
 
-  for (var account in exports.config.accounts) {
-    var accountInfo = exports.config.accounts[account];
+  for (var account in config.accounts) {
+    var accountInfo = config.accounts[account];
     if ("object" === typeof accountInfo) {
       if (accountInfo.secret) {
         // Index by nickname ...
@@ -1191,7 +1192,6 @@ Remote.prototype.transaction = function () {
   return new Transaction(this);
 };
 
-exports.config          = {};
 exports.Remote          = Remote;
 
 // vim:sw=2:sts=2:ts=8:et
diff --git a/src/js/seed.js b/src/js/seed.js
new file mode 100644
index 0000000000..b26f2e2c67
--- /dev/null
+++ b/src/js/seed.js
@@ -0,0 +1,89 @@
+//
+// Seed support
+//
+
+var utils   = require('./utils');
+var jsbn    = require('./jsbn');
+
+var BigInteger = jsbn.BigInteger;
+
+var Base = require('./base').Base;
+
+var Seed = function () {
+  // Internal form: NaN or BigInteger
+  this._value  = NaN;
+};
+
+Seed.json_rewrite = function (j) {
+  return Seed.from_json(j).to_json();
+};
+
+// Return a new Seed from j.
+Seed.from_json = function (j) {
+  return 'string' === typeof j
+      ? (new Seed()).parse_json(j)
+      : j.clone();
+};
+
+Seed.is_valid = function (j) {
+  return Seed.from_json(j).is_valid();
+};
+
+Seed.prototype.clone = function () {
+  return this.copyTo(new Seed());
+};
+
+// Returns copy.
+Seed.prototype.copyTo = function (d) {
+  d._value = this._value;
+
+  return d;
+};
+
+Seed.prototype.equals = function (d) {
+  return this._value instanceof BigInteger && d._value instanceof BigInteger && this._value.equals(d._value);
+};
+
+Seed.prototype.is_valid = function () {
+  return this._value instanceof BigInteger;
+};
+
+// value = NaN on error.
+// One day this will support rfc1751 too.
+Seed.prototype.parse_json = function (j) {
+  if ('string' !== typeof j) {
+    this._value  = NaN;
+  }
+  else if (j[0] === "s") {
+    this._value  = Base.decode_check(Base.VER_FAMILY_SEED, j);
+  }
+  else if (16 === j.length) {
+    this._value  = new BigInteger(utils.stringToArray(j), 128);
+  }
+  else {
+    this._value  = NaN;
+  }
+
+  return this;
+};
+
+// Convert from internal form.
+Seed.prototype.to_json = function () {
+  if (!(this._value instanceof BigInteger))
+    return NaN;
+
+  var bytes   = this._value.toByteArray().map(function (b) { return b ? b < 0 ? 256+b : b : 0; });
+  var target  = 20;
+
+  // XXX Make sure only trim off leading zeros.
+  var array = bytes.length < target
+		? bytes.length
+		  ? [].concat(utils.arraySet(target - bytes.length, 0), bytes)
+		  : utils.arraySet(target, 0)
+		: bytes.slice(target - bytes.length);
+  var output = Base.encode_check(Base.VER_FAMILY_SEED, array);
+
+  return output;
+};
+
+exports.Seed = Seed;
diff --git a/src/js/uint160.js b/src/js/uint160.js
new file mode 100644
index 0000000000..befe2f101c
--- /dev/null
+++ b/src/js/uint160.js
@@ -0,0 +1,156 @@
+
+var utils   = require('./utils');
+var config  = require('./config');
+var jsbn    = require('./jsbn');
+
+var BigInteger = jsbn.BigInteger;
+var nbi        = jsbn.nbi;
+
+var Base = require('./base').Base;
+
+//
+// UInt160 support
+//
+
+var UInt160 = function () {
+  // Internal form: NaN or BigInteger
+  this._value  = NaN;
+};
+
+UInt160.ZERO     = utils.hexToString("0000000000000000000000000000000000000000");
+UInt160.ONE      = utils.hexToString("0000000000000000000000000000000000000001");
+var ADDRESS_ZERO = UInt160.ADDRESS_ZERO = "rrrrrrrrrrrrrrrrrrrrrhoLvTp";
+var ADDRESS_ONE  = UInt160.ADDRESS_ONE = "rrrrrrrrrrrrrrrrrrrrBZbvji";
+var HEX_ZERO     = UInt160.HEX_ZERO = "0000000000000000000000000000000000000000";
+var HEX_ONE      = UInt160.HEX_ONE = "0000000000000000000000000000000000000001";
+
+UInt160.json_rewrite = function (j) {
+  return UInt160.from_json(j).to_json();
+};
+
+// Return a new UInt160 from j.
+UInt160.from_generic = function (j) {
+  return 'string' === typeof j
+      ? (new UInt160()).parse_generic(j)
+      : j.clone();
+};
+
+// Return a new UInt160 from j.
+UInt160.from_json = function (j) {
+  if ('string' === typeof j) {
+    return (new UInt160()).parse_json(j);
+  } else if (j instanceof UInt160) {
+    return j.clone();
+  } else {
+    return new UInt160();
+  }
+};
+
+UInt160.is_valid = function (j) {
+  return UInt160.from_json(j).is_valid();
+};
+
+UInt160.prototype.clone = function () {
+  return this.copyTo(new UInt160());
+};
+
+// Returns copy.
+UInt160.prototype.copyTo = function (d) {
+  d._value = this._value;
+
+  return d;
+};
+
+UInt160.prototype.equals = function (d) {
+  return this._value instanceof BigInteger && d._value instanceof BigInteger && this._value.equals(d._value);
+};
+
+UInt160.prototype.is_valid = function () {
+  return this._value instanceof BigInteger;
+};
+
+// value = NaN on error.
+UInt160.prototype.parse_generic = function (j) {
+  // Canonicalize and validate
+  if (config.accounts && j in config.accounts)
+    j = config.accounts[j].account;
+
+  switch (j) {
+    case undefined:
+    case "0":
+    case UInt160.ZERO:
+    case ADDRESS_ZERO:
+    case HEX_ZERO:
+      this._value  = nbi();
+      break;
+
+    case "1":
+    case UInt160.ONE:
+    case ADDRESS_ONE:
+    case HEX_ONE:
+      this._value  = new BigInteger([1]);
+
+      break;
+
+    default:
+      if ('string' !== typeof j) {
+	this._value  = NaN;
+      }
+      else if (j[0] === "r") {
+	this._value  = Base.decode_check(Base.VER_ACCOUNT_ID, j);
+      }
+      else if (20 === j.length) {
+	this._value  = new BigInteger(utils.stringToArray(j), 256);
+      }
+      else if (40 === j.length) {
+	// XXX Check char set!
+	this._value  = new BigInteger(j, 16);
+      }
+      else {
+	this._value  = NaN;
+      }
+  }
+
+  return this;
+};
+
+// value = NaN on error.
+UInt160.prototype.parse_json = function (j) {
+  // Canonicalize and validate
+  if (config.accounts && j in config.accounts)
+    j = config.accounts[j].account;
+
+  if ('string' !== typeof j) {
+    this._value  = NaN;
+  }
+  else if (j[0] === "r") {
+    this._value  = Base.decode_check(Base.VER_ACCOUNT_ID, j);
+  }
+  else {
+    this._value  = NaN;
+  }
+
+  return this;
+};
+
+// Convert from internal form.
+// XXX Json form should allow 0 and 1, C++ doesn't currently allow it.
+UInt160.prototype.to_json = function () {
+  if (!(this._value instanceof BigInteger))
+    return NaN;
+
+  var bytes   = this._value.toByteArray().map(function (b) { return b ? b < 0 ? 256+b : b : 0});
+  var target  = 20;
+
+  // XXX Make sure only trim off leading zeros.
+  var array = bytes.length < target
+		? bytes.length
+		  ? [].concat(utils.arraySet(target - bytes.length, 0), bytes)
+		  : utils.arraySet(target, 0)
+		: bytes.slice(target - bytes.length);
+  var output = Base.encode_check(Base.VER_ACCOUNT_ID, array);
+
+  return output;
+};
+
+exports.UInt160 = UInt160;
diff --git a/test/amount-test.js b/test/amount-test.js
index 71279cbeed..e5bec8e00d 100644
--- a/test/amount-test.js
+++ b/test/amount-test.js
@@ -8,7 +8,8 @@ var amount      = require("../src/js/amount.js");
 var Amount      = require("../src/js/amount.js").Amount;
 var UInt160     = require("../src/js/amount.js").UInt160;
 
-require("../src/js/amount.js").config = require("./config.js");
+var extend      = require('extend');
+extend(require('../src/js/config'), require('./config'));
 
 var config  = require('./config.js');
 
@@ -20,16 +21,16 @@ buster.testCase("Amount", {
       buster.assert.equals(nbi(), UInt160.from_generic("0")._value);
     },
     "Parse 0 export" : function () {
-      buster.assert.equals(amount.consts.address_xns, UInt160.from_generic("0").to_json());
+      buster.assert.equals(UInt160.ADDRESS_ZERO, UInt160.from_generic("0").to_json());
     },
     "Parse 1" : function () {
       buster.assert.equals(new BigInteger([1]), UInt160.from_generic("1")._value);
     },
     "Parse rrrrrrrrrrrrrrrrrrrrrhoLvTp export" : function () {
-      buster.assert.equals(amount.consts.address_xns, UInt160.from_json("rrrrrrrrrrrrrrrrrrrrrhoLvTp").to_json());
+      buster.assert.equals(UInt160.ADDRESS_ZERO, UInt160.from_json("rrrrrrrrrrrrrrrrrrrrrhoLvTp").to_json());
     },
     "Parse rrrrrrrrrrrrrrrrrrrrBZbvji export" : function () {
-      buster.assert.equals(amount.consts.address_one, UInt160.from_json("rrrrrrrrrrrrrrrrrrrrBZbvji").to_json());
+      buster.assert.equals(UInt160.ADDRESS_ONE, UInt160.from_json("rrrrrrrrrrrrrrrrrrrrBZbvji").to_json());
     },
     "Parse mtgox export" : function () {
       buster.assert.equals(config.accounts["mtgox"].account, UInt160.from_json("mtgox").to_json());
diff --git a/test/jsonrpc-test.js b/test/jsonrpc-test.js
index ffad70ba60..c1569ba5d5 100644
--- a/test/jsonrpc-test.js
+++ b/test/jsonrpc-test.js
@@ -12,8 +12,8 @@ var testutils = require("./testutils.js");
 
 var config = require("./config.js");
 
-require("../src/js/amount.js").config = require("./config.js");
-require("../src/js/remote.js").config = require("./config.js");
+var extend    = require('extend');
+extend(require('../src/js/config'), require('./config'));
 
 // How long to wait for server to start.
 var serverDelay = 1500;
diff --git a/test/monitor-test.js b/test/monitor-test.js
index daef55a658..861f4c15d6 100644
--- a/test/monitor-test.js
+++ b/test/monitor-test.js
@@ -7,8 +7,8 @@ var Server    = require("./server.js").Server;
 
 var testutils = require("./testutils.js");
 
-require("../src/js/amount.js").config = require("./config.js");
-require("../src/js/remote.js").config = require("./config.js");
+var extend    = require('extend');
+extend(require('../src/js/config'), require('./config'));
 
 buster.testRunner.timeout = 5000;
 
diff --git a/test/offer-test.js b/test/offer-test.js
index de87c7d103..07122d1d8f 100644
--- a/test/offer-test.js
+++ b/test/offer-test.js
@@ -9,8 +9,8 @@ var Server      = require("./server").Server;
 
 var testutils = require("./testutils");
 
-require("../src/js/amount").config = require("./config");
-require("../src/js/remote").config = require("./config");
+var extend      = require('extend');
+extend(require('../src/js/config'), require('./config'));
 
 buster.testRunner.timeout = 5000;
 
diff --git a/test/path-test.js b/test/path-test.js
index 9cc0d7f82f..dbc72ef89c 100644
--- a/test/path-test.js
+++ b/test/path-test.js
@@ -7,8 +7,8 @@ var Server    = require("./server.js").Server;
 
 var testutils = require("./testutils.js");
 
-require("../src/js/amount.js").config = require("./config.js");
-require("../src/js/remote.js").config = require("./config.js");
+var extend    = require('extend');
+extend(require('../src/js/config'), require('./config'));
 
 buster.testRunner.timeout = 5000;
 
diff --git a/test/remote-test.js b/test/remote-test.js
index 75ade8be34..e54afde222 100644
--- a/test/remote-test.js
+++ b/test/remote-test.js
@@ -6,8 +6,8 @@ var Server    = require("./server.js").Server;
 
 var testutils = require("./testutils.js");
 
-require("../src/js/amount.js").config = require("./config.js");
-require("../src/js/remote.js").config = require("./config.js");
+var extend      = require('extend');
+extend(require('../src/js/config'), require('./config'));
 
 // How long to wait for server to start.
 var serverDelay = 1500;   // XXX Not implemented.
diff --git a/test/send-test.js b/test/send-test.js
index d2fe9c7f32..524841e862 100644
--- a/test/send-test.js
+++ b/test/send-test.js
@@ -7,8 +7,8 @@ var Server    = require("./server.js").Server;
 
 var testutils = require("./testutils.js");
 
-require("../src/js/amount.js").config = require("./config.js");
-require("../src/js/remote.js").config = require("./config.js");
+var extend      = require('extend');
+extend(require('../src/js/config'), require('./config'));
 
 // How long to wait for server to start.
 var serverDelay = 1500;
diff --git a/test/testutils.js b/test/testutils.js
index deddc3009f..3ef6d6354c 100644
--- a/test/testutils.js
+++ b/test/testutils.js
@@ -4,8 +4,8 @@ var Amount  = require("../src/js/amount.js").Amount;
 var Remote  = require("../src/js/remote.js").Remote;
 var Server  = require("./server.js").Server;
 
-require("../src/js/amount.js").config = require("./config.js");
-require("../src/js/remote.js").config = require("./config.js");
+var extend  = require('extend');
+extend(require('../src/js/config'), require('./config'));
 
 var config  = require("./config.js");
 
diff --git a/test/websocket-test.js b/test/websocket-test.js
index 02d7e59f9b..5f15135cc4 100644
--- a/test/websocket-test.js
+++ b/test/websocket-test.js
@@ -4,7 +4,8 @@ var Server  = require("./server.js").Server;
 var Remote  = require("../src/js/remote.js").Remote;
 var config  = require("./config.js");
 
-require("../src/js/remote.js").config = require("./config.js");
+var extend  = require('extend');
+extend(require('../src/js/config'), require('./config'));
 
 buster.testRunner.timeout = 5000;