diff --git a/lib/bcoin/address.js b/lib/bcoin/address.js
index ae122235..4a70dcc5 100644
--- a/lib/bcoin/address.js
+++ b/lib/bcoin/address.js
@@ -41,32 +41,23 @@ function Address(options) {
   this.path = options.path;
 
   this.type = options.type || 'pubkeyhash';
-  this.subtype = options.subtype;
   this.keys = [];
   this.m = options.m || 1;
   this.n = options.n || 1;
   this.redeem = null;
 
-  if (this.n > 1) {
-    if (this.type !== 'multisig')
-      this.type = 'scripthash';
-    if (this.type === 'scripthash')
-      this.subtype = 'multisig';
-  }
+  if (this.n > 1)
+    this.type = 'multisig';
 
-  if (network.prefixes[this.type] == null)
-    throw new Error('Unknown prefix: ' + this.type);
+  assert(this.type === 'pubkeyhash' || this.type === 'multisig');
+  this.prefixType = this.type === 'multisig' ? 'scripthash' : 'pubkeyhash';
 
-  this.nmax = this.type === 'scripthash'
-    ? (this.key.compressed ? 15 : 7)
-    : 3;
+  if (network.prefixes[this.prefixType] == null)
+    throw new Error('Unknown prefix: ' + this.prefixType);
 
   if (this.m < 1 || this.m > this.n)
     throw new Error('m ranges between 1 and n');
 
-  if (this.n < 1 || this.n > this.nmax)
-    throw new Error('n ranges between 1 and ' + this.nmax);
-
   this.addKey(this.getPublicKey());
 
   (options.keys || []).forEach(function(key) {
@@ -76,7 +67,7 @@ function Address(options) {
   if (options.redeem || options.script)
     this.setRedeem(options.redeem || options.script);
 
-  this.prefix = 'bt/address/' + this.getKeyAddress() + '/';
+  this.prefix = 'bt/address/' + this.getID() + '/';
 }
 
 inherits(Address, EventEmitter);
@@ -85,6 +76,10 @@ Address.prototype.__defineGetter__('balance', function() {
   return this.getBalance();
 });
 
+Address.prototype.getID = function getID() {
+  return this.getKeyAddress();
+};
+
 Address.prototype.getAll = function getAll() {
   return this._wallet.getAll(this);
 };
@@ -115,8 +110,8 @@ Address.prototype.setRedeem = function setRedeem(redeem) {
   if (!utils.isBytes(redeem))
     redeem = bcoin.script.encode(redeem);
 
-  this.type = 'scripthash';
-  this.subtype = null;
+  this.type = 'multisig';
+  this.prefixType = 'scripthash';
   this.redeem = redeem;
   this.emit('update script', old, this.getScriptAddress());
 };
@@ -192,49 +187,53 @@ Address.fromSecret = function fromSecret(privateKey) {
 };
 
 Address.prototype.getScript = function getScript() {
-  if (this.type !== 'scripthash')
+  var redeem;
+
+  if (this.prefixType !== 'scripthash')
     return;
 
   if (this._script)
     return this._script;
 
-  if (this.redeem)
-    return this._script = this.redeem.slice();
+  if (this.redeem) {
+    redeem = this.redeem.slice();
+    assert(utils.isBytes(redeem));
+  } else if (this.keys.length < this.n) {
+    redeem = bcoin.script.createPubkeyhash(this.getKeyHash());
+    redeem = bcoin.script.encode(redeem);
+  } else {
+    redeem = bcoin.script.createMultisig(this.keys, this.m, this.n);
+    redeem = bcoin.script.encode(redeem);
+  }
 
-  if (this.subtype === 'pubkey')
-    this._script = bcoin.script.createPubkey(this.getPublicKey());
-  else if (this.subtype === 'pubkeyhash' || this.keys.length < this.n)
-    this._script = bcoin.script.createPubkeyhash(this.getKeyHash());
-  else if (this.subtype === 'multisig')
-    this._script = bcoin.script.createMultisig(this.keys, this.m, this.n);
-  else
-    assert(false);
+  if (redeem.length > 520)
+    throw new Error('Redeem script too large (520 byte limit).');
 
-  this._script = bcoin.script.encode(this._script);
+  this._script = redeem;
 
   return this._script;
 };
 
 Address.prototype.getScriptHash = function getScriptHash() {
-  if (this.type !== 'scripthash')
+  if (this.prefixType !== 'scripthash')
     return;
 
   if (this._scriptHash)
     return this._scriptHash;
 
-  this._scriptHash = utils.ripesha(this.getScript());
+  this._scriptHash = Address.hash160(this.getScript());
 
   return this._scriptHash;
 };
 
 Address.prototype.getScriptAddress = function getScriptAddress() {
-  if (this.type !== 'scripthash')
+  if (this.prefixType !== 'scripthash')
     return;
 
   if (this._scriptAddress)
     return this._scriptAddress;
 
-  this._scriptAddress = Address.hash2addr(this.getScriptHash(), this.type);
+  this._scriptAddress = Address.toAddress(this.getScriptHash(), this.prefixType);
 
   return this._scriptAddress;
 };
@@ -256,7 +255,7 @@ Address.prototype.getKeyHash = function getKeyHash() {
   if (this._hash)
     return this._hash;
 
-  this._hash = Address.key2hash(this.getPublicKey());
+  this._hash = Address.hash160(this.getPublicKey());
 
   return this._hash;
 };
@@ -265,127 +264,41 @@ Address.prototype.getKeyAddress = function getKeyAddress() {
   if (this._address)
     return this._address;
 
-  this._address = Address.hash2addr(this.getKeyHash(), 'pubkeyhash');
+  this._address = Address.toAddress(this.getKeyHash(), 'pubkeyhash');
 
   return this._address;
 };
 
 Address.prototype.getHash = function getHash() {
-  if (this.type === 'scripthash')
+  if (this.prefixType === 'scripthash')
     return this.getScriptHash();
   return this.getKeyHash();
 };
 
 Address.prototype.getAddress = function getAddress() {
-  if (this.type === 'scripthash')
+  if (this.prefixType === 'scripthash')
     return this.getScriptAddress();
   return this.getKeyAddress();
 };
 
-Address.key2hash = function key2hash(key) {
-  key = utils.toBuffer(key);
-  return utils.ripesha(key);
+Address.prototype._getAddressTable = function _getAddressTable() {
+  var addressTable = {};
+  addressTable[this.getAddress()] = true;
+  return addressTable;
 };
 
-Address.hash2addr = function hash2addr(hash, prefix) {
-  var addr;
-
-  hash = utils.toArray(hash, 'hex');
-
-  prefix = network.prefixes[prefix || 'pubkeyhash'];
-  hash = [ prefix ].concat(hash);
-
-  addr = hash.concat(utils.checksum(hash));
-
-  return utils.toBase58(addr);
-};
-
-Address.key2addr = function key2addr(key, prefix) {
-  return Address.hash2addr(Address.key2hash(key), prefix);
-};
-
-Address.__defineGetter__('prefixes', function() {
-  if (Address._prefixes)
-    return Address._prefixes;
-
-  Address._prefixes = ['pubkeyhash', 'scripthash'].reduce(function(out, prefix) {
-    var ch = Address.hash2addr(Address.key2hash([]), prefix)[0];
-    out[ch] = prefix;
-    return out;
-  }, {});
-
-  return Address._prefixes;
-});
-
-Address.addr2hash = function addr2hash(addr, prefix) {
-  var chk;
-
-  if (prefix == null && typeof addr === 'string')
-    prefix = Address.prefixes[addr[0]];
-
-  if (!utils.isBuffer(addr))
-    addr = utils.fromBase58(addr);
-
-  prefix = network.prefixes[prefix || 'pubkeyhash'];
-
-  if (addr.length !== 25)
-    return [];
-
-  if (addr[0] !== prefix)
-    return [];
-
-  chk = utils.checksum(addr.slice(0, -4));
-
-  if (utils.readU32(chk, 0) !== utils.readU32(addr, 21))
-    return [];
-
-  return addr.slice(1, -4);
-};
-
-Address.validate = function validate(addr, prefix) {
-  if (!addr || typeof addr !== 'string')
-    return false;
-
-  var p = Address.addr2hash(addr, prefix);
-
-  return p.length !== 0;
-};
-
-Address.validateAddress = Address.validate;
-
 Address.prototype.ownOutput = function ownOutput(tx, index) {
-  var scriptHash = this.getScriptHash();
-  var hash = this.getKeyHash();
-  var key = this.getPublicKey();
-  var keys = this.keys;
+  var addressTable = this._getAddressTable();
   var outputs = tx.outputs;
 
   if ((tx instanceof bcoin.output) || (tx instanceof bcoin.coin))
     outputs = [tx];
 
   outputs = outputs.filter(function(output, i) {
-    var s = output.script;
-
     if (index != null && index !== i)
       return false;
 
-    return output.testScript(key, hash, keys, scriptHash, null);
-
-    if (bcoin.script.isPubkey(s, key))
-      return true;
-
-    if (bcoin.script.isPubkeyhash(s, hash))
-      return true;
-
-    if (bcoin.script.isMultisig(s, keys))
-      return true;
-
-    if (scriptHash) {
-      if (bcoin.script.isScripthash(s, scriptHash))
-        return true;
-    }
-
-    return false;
+    return output.test(addressTable, true);
   }, this);
 
   if (outputs.length === 0)
@@ -395,11 +308,7 @@ Address.prototype.ownOutput = function ownOutput(tx, index) {
 };
 
 Address.prototype.ownInput = function ownInput(tx, index) {
-  var scriptHash = this.getScriptHash();
-  var hash = this.getKeyHash();
-  var key = this.getPublicKey();
-  var redeem = this.getScript();
-  var keys = this.keys;
+  var addressTable = this._getAddressTable();
   var inputs = tx.inputs;
 
   if (tx instanceof bcoin.input) {
@@ -415,25 +324,9 @@ Address.prototype.ownInput = function ownInput(tx, index) {
       return false;
 
     if (input.output)
-      return !!this.ownOutput(input.output);
+      return input.output.test(addressTable, true);
 
-    return input.testScript(key, redeem, null);
-
-    // if (bcoin.script.isPubkeyInput(input.script, key, tx, i))
-    //   return true;
-
-    if (bcoin.script.isPubkeyhashInput(input.script, key))
-      return true;
-
-    // if (bcoin.script.isMultisigInput(input.script, keys, tx, i))
-    //   return true;
-
-    if (redeem) {
-      if (bcoin.script.isScripthashInput(input.script, redeem))
-        return true;
-    }
-
-    return false;
+    return input.test(addressTable, true);
   }, this);
 
   if (inputs.length === 0)
@@ -544,7 +437,7 @@ Address.prototype.__defineGetter__('address', function() {
   return this.getAddress();
 });
 
-Address.prototype.toAddress = function toAddress() {
+Address.prototype.toExplore = function toExplore() {
   return {
     address: this.getAddress(),
     hash160: utils.toHex(this.getHash()),
@@ -555,6 +448,77 @@ Address.prototype.toAddress = function toAddress() {
   };
 };
 
+Address.hash160 = function hash160(key) {
+  key = utils.toBuffer(key);
+  return utils.ripesha(key);
+};
+
+Address.toAddress = function toAddress(hash, prefix) {
+  var addr;
+
+  hash = utils.toArray(hash, 'hex');
+
+  prefix = network.prefixes[prefix || 'pubkeyhash'];
+  hash = [prefix].concat(hash);
+
+  addr = hash.concat(utils.checksum(hash));
+
+  return utils.toBase58(addr);
+};
+
+Address.compile = function compile(key, prefix) {
+  return Address.toAddress(Address.hash160(key), prefix);
+};
+
+Address.toHash = function toHash(addr, prefix) {
+  var chk;
+
+  if (prefix == null && typeof addr === 'string')
+    prefix = Address.prefixes[addr[0]];
+
+  if (!utils.isBuffer(addr))
+    addr = utils.fromBase58(addr);
+
+  prefix = network.prefixes[prefix || 'pubkeyhash'];
+
+  if (addr.length !== 25)
+    return [];
+
+  if (addr[0] !== prefix)
+    return [];
+
+  chk = utils.checksum(addr.slice(0, -4));
+
+  if (utils.readU32(chk, 0) !== utils.readU32(addr, 21))
+    return [];
+
+  return addr.slice(1, -4);
+};
+
+Address.__defineGetter__('prefixes', function() {
+  if (Address._prefixes)
+    return Address._prefixes;
+
+  Address._prefixes = ['pubkeyhash', 'scripthash'].reduce(function(out, prefix) {
+    var ch = Address.compile([], prefix)[0];
+    out[ch] = prefix;
+    return out;
+  }, {});
+
+  return Address._prefixes;
+});
+
+Address.validate = function validate(addr, prefix) {
+  if (!addr || typeof addr !== 'string')
+    return false;
+
+  var p = Address.toHash(addr, prefix);
+
+  return p.length !== 0;
+};
+
+Address.validateAddress = Address.validate;
+
 Address.prototype.toJSON = function toJSON(encrypt) {
   return {
     v: 1,
@@ -565,11 +529,9 @@ Address.prototype.toJSON = function toJSON(encrypt) {
     derived: this.derived,
     index: this.index,
     path: this.path,
-    address: this.getKeyAddress(),
-    scriptAddress: this.getScriptAddress(),
+    address: this.getAddress(),
     key: this.key.toJSON(encrypt),
     type: this.type,
-    subtype: this.subtype,
     redeem: this.redeem ? utils.toHex(this.redeem) : null,
     keys: this.keys.map(utils.toBase58),
     m: this.m,
@@ -594,7 +556,6 @@ Address.fromJSON = function fromJSON(json, decrypt) {
     path: json.path,
     key: bcoin.keypair.fromJSON(json.key, decrypt),
     type: json.type,
-    subtype: json.subtype,
     redeem: json.redeem ? utils.toArray(json.redeem, 'hex') : null,
     keys: json.keys.map(utils.fromBase58),
     m: json.m,
diff --git a/lib/bcoin/chain.js b/lib/bcoin/chain.js
index 57b4fd57..0f86286a 100644
--- a/lib/bcoin/chain.js
+++ b/lib/bcoin/chain.js
@@ -639,9 +639,13 @@ Chain.prototype.getTip = function getTip() {
 };
 
 Chain.prototype.isFull = function isFull() {
+  var delta;
+
   if (!this.tip)
     return false;
-  var delta = utils.now() - this.tip.ts;
+
+  delta = utils.now() - this.tip.ts;
+
   return delta < 40 * 60;
 };
 
@@ -653,14 +657,15 @@ Chain.prototype.fillPercent = function fillPercent() {
 
 Chain.prototype.hashRange = function hashRange(start, end) {
   var hashes = [];
+  var i;
 
   start = this.byTime(start);
   end = this.byTime(end);
 
   if (!start || !end)
-    return [];
+    return hashes;
 
-  for (var i = start.height; i < end.height + 1; i++)
+  for (i = start.height; i < end.height + 1; i++)
     hashes.push(this.db.get(i).hash);
 
   return hashes;
@@ -743,11 +748,17 @@ Chain.prototype.getHeight = function getHeight(hash) {
 
 Chain.prototype.getNextBlock = function getNextBlock(hash) {
   var entry = this.byHash(hash);
+  var next;
 
-  if (!entry || !entry.next)
+  if (!entry)
     return null;
 
-  return entry.next.hash;
+  next = entry.next;
+
+  if (!next)
+    return;
+
+  return next.hash;
 };
 
 Chain.prototype.getSize = function getSize() {
diff --git a/lib/bcoin/chainblock.js b/lib/bcoin/chainblock.js
index 51fdfb53..a56ed23a 100644
--- a/lib/bcoin/chainblock.js
+++ b/lib/bcoin/chainblock.js
@@ -53,7 +53,8 @@ ChainBlock.prototype.getProof = function getProof() {
 };
 
 ChainBlock.prototype.getChainwork = function() {
-  return (this.prev ? this.prev.chainwork : new bn(0)).add(this.getProof());
+  var prev = this.prev;
+  return (prev ? prev.chainwork : new bn(0)).add(this.getProof());
 };
 
 ChainBlock.prototype.getMedianTime = function() {
diff --git a/lib/bcoin/chaindb.js b/lib/bcoin/chaindb.js
index 04a36a23..3b048621 100644
--- a/lib/bcoin/chaindb.js
+++ b/lib/bcoin/chaindb.js
@@ -107,6 +107,9 @@ ChainDB.prototype._free = function(buf) {
 };
 
 ChainDB.prototype.exists = function exists() {
+  if (!bcoin.fs)
+    return true;
+
   try {
     fs.statSync(this.file);
     return true;
@@ -116,6 +119,9 @@ ChainDB.prototype.exists = function exists() {
 };
 
 ChainDB.prototype.getSize = function getSize() {
+  if (!bcoin.fs)
+    return this.ramdisk.size;
+
   try {
     return fs.statSync(this.file).size;
   } catch (e) {
@@ -306,18 +312,26 @@ ChainDB.prototype.remove = function remove(height) {
     while (this.isNull(height))
       height--;
 
-    if (height < 0)
-      height = 0;
+    assert(height >= 0);
 
-    fs.ftruncateSync(this.fd, (height + 1) * BLOCK_SIZE);
-
-    this.size = (height + 1) * BLOCK_SIZE;
-    this.tip = height;
+    this.truncate(height);
   }
 
   return true;
 };
 
+ChainDB.prototype.truncate = function truncate(height) {
+  this.size = (height + 1) * BLOCK_SIZE;
+  this.tip = height;
+
+  if (!bcoin.fs) {
+    this.ramdisk.truncate(this.size);
+    return;
+  }
+
+  fs.ftruncateSync(this.fd, this.size);
+};
+
 ChainDB.prototype.isNull = function isNull(height) {
   var data = this._readSync(4, height * BLOCK_SIZE);
   if (!data)
diff --git a/lib/bcoin/hd.js b/lib/bcoin/hd.js
index 71c1ede9..fe21186d 100644
--- a/lib/bcoin/hd.js
+++ b/lib/bcoin/hd.js
@@ -199,7 +199,7 @@ HDPrivateKey.prototype.scan44 = function scan44(options, txByAddress, callback)
       // respect the gap limit described below
       return (function next() {
         var address = chain.derive(addressIndex++);
-        var addr = bcoin.address.key2addr(address.publicKey);
+        var addr = bcoin.address.compile(address.publicKey);
 
         return txByAddress(addr, function(err, txs) {
           var result;
@@ -346,7 +346,7 @@ HDPrivateKey.prototype.scan45 = function scan45(options, txByAddress, callback)
 
       return (function next() {
         var address = chain.derive(addressIndex++);
-        var addr = bcoin.address.key2addr(address.publicKey);
+        var addr = bcoin.address.compile(address.publicKey);
 
         return txByAddress(addr, function(err, txs) {
           var result;
@@ -837,7 +837,7 @@ function HDPublicKey(options) {
   if (!options)
     throw new Error('No options for HDPublicKey');
 
-  if (HDPublicKey.isExtended(data))
+  if (HDPublicKey.isExtended(options))
     options = { xkey: options };
 
   data = options.xkey
diff --git a/lib/bcoin/input.js b/lib/bcoin/input.js
index 283847b6..599808f8 100644
--- a/lib/bcoin/input.js
+++ b/lib/bcoin/input.js
@@ -104,7 +104,7 @@ Input.prototype.__defineGetter__('id', function() {
 });
 
 Input.prototype.__defineGetter__('address', function() {
-  return this.data.scriptAddress || this.addresses[0];
+  return this.data.address;
 });
 
 Input.prototype.__defineGetter__('signatures', function() {
@@ -163,34 +163,6 @@ Input.prototype.__defineGetter__('value', function() {
   return this.output.value;
 });
 
-Input.prototype.__defineGetter__('addr', function() {
-  return this.address;
-});
-
-Input.prototype.__defineGetter__('addrs', function() {
-  return this.addresses;
-});
-
-Input.prototype.__defineGetter__('pub', function() {
-  return this.key;
-});
-
-Input.prototype.__defineGetter__('pubs', function() {
-  return this.keys;
-});
-
-Input.prototype.__defineGetter__('sig', function() {
-  return this.signature;
-});
-
-Input.prototype.__defineGetter__('sigs', function() {
-  return this.signatures;
-});
-
-Input.prototype.__defineGetter__('scriptaddr', function() {
-  return this.scriptAddress;
-});
-
 // Schema and defaults for data object:
 // {
 //   type: String,
@@ -253,25 +225,18 @@ Input.prototype.getData = function getData() {
   return Input.getData(this);
 };
 
-Input.prototype.getAddresses = function getAddresses() {
-  return this.getData().addresses;
-};
-
-Input.prototype.getScriptAddress = function getScriptAddress() {
-  return this.getData().scriptAddress;
-};
-
-Input.prototype.getKeyAddress = function getKeyAddress() {
-  return this.getData().addresses[0];
+Input.prototype.getType = function getType() {
+  var prev = this.output ? this.output.script : null;
+  return bcoin.script.getInputType(this.script, prev);
 };
 
 Input.prototype.getAddress = function getAddress() {
-  var data = this.getData();
+  var prev = this.output ? this.output.script : null;
+  return bcoin.script.getInputAddress(this.script, prev);
+};
 
-  if (data.scriptAddress)
-    return data.scriptAddress;
-
-  return data.addresses[0];
+Input.prototype.isRBF = function isRBF() {
+  return this.sequence === 0xffffffff - 1;
 };
 
 Input.prototype.isFinal = function isFinal() {
@@ -338,17 +303,16 @@ Input.prototype.testScript = function testScript(key, redeem, type) {
 };
 
 Input.prototype.test = function test(addressTable) {
-  var data = this.getData();
-  var i;
+  var address = this.getAddress();
 
-  if (data.scriptAddress) {
-    if (addressTable[data.scriptAddress] != null)
-      return true;
-  }
-
-  for (i = 0; i < data.addresses.length; i++) {
-    if (addressTable[data.addresses[i]] != null)
-      return true;
+  if (address) {
+    if (Array.isArray(addressTable)) {
+      if (addressTable.indexOf(address) !== -1)
+        return true;
+    } else {
+      if (addressTable[address] != null)
+        return true;
+    }
   }
 
   return false;
diff --git a/lib/bcoin/output.js b/lib/bcoin/output.js
index d58cf134..60d2bfb0 100644
--- a/lib/bcoin/output.js
+++ b/lib/bcoin/output.js
@@ -75,7 +75,7 @@ Output.prototype.__defineGetter__('id', function() {
 });
 
 Output.prototype.__defineGetter__('address', function() {
-  return this.data.scriptAddress || this.addresses[0];
+  return this.data.address;
 });
 
 Output.prototype.__defineGetter__('signatures', function() {
@@ -122,35 +122,6 @@ Output.prototype.__defineGetter__('text', function() {
   return this.data.text;
 });
 
-// Legacy
-Output.prototype.__defineGetter__('addr', function() {
-  return this.address;
-});
-
-Output.prototype.__defineGetter__('addrs', function() {
-  return this.addresses;
-});
-
-Output.prototype.__defineGetter__('pub', function() {
-  return this.key;
-});
-
-Output.prototype.__defineGetter__('pubs', function() {
-  return this.keys;
-});
-
-Output.prototype.__defineGetter__('sig', function() {
-  return this.signature;
-});
-
-Output.prototype.__defineGetter__('sigs', function() {
-  return this.signatures;
-});
-
-Output.prototype.__defineGetter__('scriptaddr', function() {
-  return this.scriptAddress;
-});
-
 // Schema and defaults for data object:
 // {
 //   type: String,
@@ -195,25 +166,12 @@ Output.prototype.getData = function getData() {
   return Output.getData(this);
 };
 
-Output.prototype.getAddresses = function getAddresses() {
-  return this.getData().addresses;
-};
-
-Output.prototype.getScriptAddress = function getScriptAddress() {
-  return this.getData().scriptAddress;
-};
-
-Output.prototype.getKeyAddress = function getKeyAddress() {
-  return this.getData().addresses[0];
+Output.prototype.getType = function getType() {
+  return bcoin.script.getOutputType(this.script);
 };
 
 Output.prototype.getAddress = function getAddress() {
-  var data = this.getData();
-
-  if (data.scriptAddress)
-    return data.scriptAddress;
-
-  return data.addresses[0];
+  return bcoin.script.getOutputAddress(this.script);
 };
 
 Output.prototype.getID = function getID() {
@@ -255,17 +213,16 @@ Output.prototype.testScript = function testScript(key, hash, keys, scriptHash, t
 };
 
 Output.prototype.test = function test(addressTable) {
-  var data = this.getData();
-  var i;
+  var address = this.getAddress();
 
-  if (data.scriptAddress) {
-    if (addressTable[data.scriptAddress] != null)
-      return true;
-  }
-
-  for (i = 0; i < data.addresses.length; i++) {
-    if (addressTable[data.addresses[i]] != null)
-      return true;
+  if (address) {
+    if (Array.isArray(addressTable)) {
+      if (addressTable.indexOf(address) !== -1)
+        return true;
+    } else {
+      if (addressTable[address] != null)
+        return true;
+    }
   }
 
   return false;
diff --git a/lib/bcoin/protocol/constants.js b/lib/bcoin/protocol/constants.js
index d586a462..edf98fbd 100644
--- a/lib/bcoin/protocol/constants.js
+++ b/lib/bcoin/protocol/constants.js
@@ -205,13 +205,18 @@ exports.block = {
 
 exports.tx = {
   maxSize: 100000,
-  fee: 10000,
-  dust: 5460,
+  minFee: 10000,
   bareMultisig: true,
   freeThreshold: exports.coin.muln(144).divn(250),
   maxFreeSize: 1000
 };
 
+exports.tx.dustThreshold = new bn(182)
+  .muln(exports.tx.minFee)
+  .divn(1000)
+  .muln(3)
+  .toNumber();
+
 exports.script = {
   maxSize: 10000,
   maxStack: 1000,
diff --git a/lib/bcoin/protocol/network.js b/lib/bcoin/protocol/network.js
index 995cee2b..a88b107d 100644
--- a/lib/bcoin/protocol/network.js
+++ b/lib/bcoin/protocol/network.js
@@ -27,9 +27,7 @@ network.set = function set(type) {
 main = network.main = {};
 
 main.prefixes = {
-  pubkey: 0,
   pubkeyhash: 0,
-  multisig: 0,
   scripthash: 5,
   privkey: 128,
   xpubkey: 0x0488b21e,
@@ -132,9 +130,7 @@ testnet = network.testnet = {};
 testnet.type = 'testnet';
 
 testnet.prefixes = {
-  pubkey: 111,
   pubkeyhash: 111,
-  multisig: 111,
   scripthash: 196,
   privkey: 239,
   xpubkey: 0x043587cf,
@@ -220,9 +216,7 @@ regtest = network.regtest = {};
 regtest.type = 'testnet';
 
 regtest.prefixes = {
-  pubkey: 111,
   pubkeyhash: 111,
-  multisig: 111,
   scripthash: 196,
   privkey: 239,
   xpubkey: 0x043587cf,
diff --git a/lib/bcoin/script.js b/lib/bcoin/script.js
index 7d1ddf52..12a5f9cb 100644
--- a/lib/bcoin/script.js
+++ b/lib/bcoin/script.js
@@ -762,7 +762,7 @@ script.execute = function execute(data, stack, tx, index, flags, recurse) {
             n2 = script.num(stack.pop());
             n1 = script.num(stack.pop());
             val = n2.cmp(n1) <= 0 && n1.cmp(n3) < 0;
-            stack.push(val.cmpn(0) !== 0 ? [ 1 ] : []);
+            stack.push(val.cmpn(0) !== 0 ? [1] : []);
             break;
         }
 
@@ -811,7 +811,7 @@ script.execute = function execute(data, stack, tx, index, flags, recurse) {
           if (!res)
             return false;
         } else {
-          stack.push(res ? [ 1 ] : []);
+          stack.push(res ? [1] : []);
         }
         break;
       }
@@ -841,7 +841,7 @@ script.execute = function execute(data, stack, tx, index, flags, recurse) {
           if (!res)
             return false;
         } else {
-          stack.push(res ? [ 1 ] : []);
+          stack.push(res ? [1] : []);
         }
 
         break;
@@ -918,7 +918,7 @@ script.execute = function execute(data, stack, tx, index, flags, recurse) {
           if (!res)
             return false;
         } else {
-          stack.push(res ? [ 1 ] : []);
+          stack.push(res ? [1] : []);
         }
 
         break;
@@ -1204,10 +1204,11 @@ script.getRedeem = function getRedeem(s) {
   if (!Array.isArray(s[s.length - 1]))
     return;
 
-  return bcoin.script.decode(s[s.length - 1]);
+  return script.decode(s[s.length - 1]);
 };
 
-script.getType = function getType(s) {
+script.getType =
+script.getOutputType = function getOutputType(s) {
   return (script.isPubkey(s) && 'pubkey')
     || (script.isPubkeyhash(s) && 'pubkeyhash')
     || (script.isMultisig(s) && 'multisig')
@@ -1268,19 +1269,20 @@ script.isEncoded = function isEncoded(s) {
 };
 
 script._locktime = function _locktime(s) {
-  var i;
-
   if (s.length < 2)
     return;
 
-  for (i = 0; i < s.length; i++) {
-    if (utils.isBuffer(s[i]) && s[i + 1] === 'checklocktimeverify')
-      return s[i];
-  }
+  if (!utils.isBuffer(s[0]))
+    return;
+
+  if (s[1] !== 'checklocktimeverify')
+    return;
+
+  return s[0];
 };
 
 script.isLocktime = function isLocktime(s) {
-  return !!script._locktime(s);
+  return script._locktime(s) != null;
 };
 
 script.getLocktime = function getLocktime(s) {
@@ -1349,13 +1351,6 @@ script._getInputData = function _getInputData(s, type) {
   assert(typeof type === 'string');
 
   if (type === 'pubkey') {
-    if (s.length < 1) {
-      return {
-        type: 'pubkey',
-        side: 'input',
-        none: true
-      };
-    }
     sig = s[0];
     return {
       type: 'pubkey',
@@ -1366,35 +1361,22 @@ script._getInputData = function _getInputData(s, type) {
   }
 
   if (type === 'pubkeyhash') {
-    if (s.length < 2) {
-      return {
-        type: 'pubkeyhash',
-        side: 'input',
-        none: true
-      };
-    }
     sig = s[0];
     key = s[1];
-    hash = bcoin.wallet.key2hash(key);
-    address = bcoin.wallet.hash2addr(hash, 'pubkeyhash');
+    hash = bcoin.address.hash160(key);
+    address = bcoin.address.toAddress(hash, 'pubkeyhash');
     return {
       type: 'pubkeyhash',
       side: 'input',
       signatures: [sig],
       keys: [key],
       hashes: [hash],
+      address: address,
       addresses: [address]
     };
   }
 
   if (type === 'multisig') {
-    if (s.length < 2) {
-      return {
-        type: 'multisig',
-        side: 'input',
-        none: true
-      };
-    }
     sig = s.slice(1);
     return {
       type: 'multisig',
@@ -1406,19 +1388,12 @@ script._getInputData = function _getInputData(s, type) {
   }
 
   if (type === 'scripthash') {
-    if (s.length < 1) {
-      return {
-        type: 'scripthash',
-        side: 'input',
-        none: true
-      };
-    }
     raw = s[s.length - 1];
     redeem = script.decode(raw);
     locktime = script.getLocktime(redeem);
-    hash = bcoin.wallet.key2hash(raw);
-    address = bcoin.wallet.hash2addr(hash, 'scripthash');
-    output = script.getOutputData(script.getSubscript(redeem));
+    hash = bcoin.address.hash160(raw);
+    address = bcoin.address.toAddress(hash, 'scripthash');
+    output = script.getOutputData(redeem, true);
     input = script._getInputData(s.slice(0, -1), output.type);
     delete input.none;
     return utils.merge(input, output, {
@@ -1426,6 +1401,7 @@ script._getInputData = function _getInputData(s, type) {
       side: 'input',
       subtype: output.type,
       redeem: redeem,
+      address: address,
       scriptHash: hash,
       scriptAddress: address,
       locktime: locktime
@@ -1435,45 +1411,56 @@ script._getInputData = function _getInputData(s, type) {
   return script.getUnknownData(s);
 };
 
-script.getOutputData = function getOutputData(s) {
-  var key, hash, address;
+script.getOutputData = function getOutputData(s, inScriptHash) {
+  var key, hash, address, mhash, maddress;
 
   if (script.isPubkey(s)) {
     key = s[0];
-    hash = bcoin.wallet.key2hash(key);
-    address = bcoin.wallet.hash2addr(hash, 'pubkey');
+    hash = bcoin.address.hash160(key);
+    // Convert p2pk to p2pkh addresses
+    address = bcoin.address.toAddress(hash, 'pubkeyhash');
     return {
       type: 'pubkey',
       side: 'output',
       keys: [key],
       hashes: [hash],
+      address: address,
       addresses: [address]
     };
   }
 
   if (script.isPubkeyhash(s)) {
     hash = s[2];
+    address = bcoin.address.toAddress(hash, 'pubkeyhash');
     return {
       type: 'pubkeyhash',
       side: 'output',
       hashes: [hash],
-      addresses: [bcoin.wallet.hash2addr(hash, 'pubkeyhash')]
+      address: address,
+      addresses: [address]
     };
   }
 
   if (script.isMultisig(s)) {
     key = s.slice(1, -2);
     hash = key.map(function(key) {
-      return bcoin.wallet.key2hash(key);
+      return bcoin.address.hash160(key);
     });
+    // Convert bare multisig to p2pkh addresses
     address = hash.map(function(hash) {
-      return bcoin.wallet.hash2addr(hash, 'multisig');
+      return bcoin.address.toAddress(hash, 'pubkeyhash');
     });
+    // Convert bare multisig script to scripthash address
+    if (!inScriptHash) {
+      mhash = bcoin.address.hash160(s._raw || script.encode(s));
+      maddress = bcoin.address.toAddress(mhash, 'scripthash');
+    }
     return {
       type: 'multisig',
       side: 'output',
       keys: key,
       hashes: hash,
+      address: maddress,
       addresses: address,
       m: s[0],
       n: s[s.length - 2]
@@ -1482,11 +1469,13 @@ script.getOutputData = function getOutputData(s) {
 
   if (script.isScripthash(s)) {
     hash = s[1];
+    address = bcoin.address.toAddress(hash, 'scripthash');
     return {
       type: 'scripthash',
       side: 'output',
+      address: address,
       scriptHash: hash,
-      scriptAddress: bcoin.wallet.hash2addr(hash, 'scripthash')
+      scriptAddress: address
     };
   }
 
@@ -1515,11 +1504,11 @@ script.getUnknownData = function getUnknownData(s) {
   }
 
   hash = key.map(function(key) {
-    return bcoin.wallet.key2hash(key);
+    return bcoin.address.hash160(key);
   });
 
   address = hash.map(function(hash) {
-    return bcoin.wallet.hash2addr(hash, 'pubkey');
+    return bcoin.address.toAddress(hash, 'pubkeyhash');
   });
 
   return {
@@ -1532,6 +1521,41 @@ script.getUnknownData = function getUnknownData(s) {
   };
 };
 
+script.getInputAddress = function getInputAddress(s, prev) {
+  if (prev)
+    return script.getOutputAddress(prev);
+
+  if (script.isPubkeyInput(s))
+    return;
+
+  if (script.isPubkeyhashInput(s))
+    return bcoin.address.compile(s[1], 'pubkeyhash');
+
+  if (script.isMultisigInput(s))
+    return;
+
+  if (script.isScripthashInput(s))
+    return bcoin.address.compile(s[s.length - 1], 'scripthash');
+};
+
+script.getOutputAddress = function getOutputAddress(s) {
+  // Convert p2pk to p2pkh addresses
+  if (script.isPubkey(s))
+    return bcoin.address.compile(s[0], 'pubkeyhash');
+
+  if (script.isPubkeyhash(s))
+    return bcoin.address.toAddress(s[2], 'pubkeyhash')
+
+  // Convert bare multisig to scripthash address
+  if (script.isMultisig(s)) {
+    s = s._raw || script.encode(s);
+    return bcoin.address.compile(s, 'scripthash');
+  }
+
+  if (script.isScripthash(s))
+    return bcoin.address.toAddress(s[1], 'scripthash');
+};
+
 script.isPubkey = function isPubkey(s, key) {
   var res;
 
@@ -1679,7 +1703,10 @@ script.isNulldata = function isNulldata(s) {
   return s[1];
 };
 
-script.getInputType = function getInputType(s) {
+script.getInputType = function getInputType(s, prev) {
+  if (prev)
+    return script.getOutputType(prev);
+
   return (script.isPubkeyInput(s) && 'pubkey')
     || (script.isPubkeyhashInput(s) && 'pubkeyhash')
     || (script.isMultisigInput(s) && 'multisig')
@@ -1793,6 +1820,9 @@ script.isScripthashInput = function isScripthashInput(s, data, strict) {
   // If the last data element is a valid
   // signature or key, it's _extremely_
   // unlikely this is a scripthash.
+  if (script.isDummy(raw))
+    return false;
+
   if (script.isSignatureEncoding(raw))
     return false;
 
@@ -1815,7 +1845,7 @@ script.isScripthashInput = function isScripthashInput(s, data, strict) {
 
   // P2SH redeem scripts can be nonstandard: make
   // it easier for other functions to parse this.
-  redeem = script.getSubscript(script.decode(raw));
+  redeem = script.decode(raw);
 
   // Get the "real" scriptSig
   s = s.slice(0, -1);
@@ -2185,7 +2215,7 @@ script.getScripthashSigops = function getScripthashSigops(s) {
   if (!script.isPushOnly(s))
     return 0;
 
-  s = script.getSubscript(script.decode(s[s.length - 1]));
+  s = script.getRedeem(s);
 
   return script.getSigops(s, true);
 };
diff --git a/lib/bcoin/tx.js b/lib/bcoin/tx.js
index 62acadf3..df3d9f26 100644
--- a/lib/bcoin/tx.js
+++ b/lib/bcoin/tx.js
@@ -257,7 +257,7 @@ TX.prototype.scriptInput = function scriptInput(index, pub, redeem) {
     input.script = [[]];
   } else if (bcoin.script.isPubkeyhash(s)) {
     // P2PKH
-    if (!utils.isEqual(s[2], bcoin.wallet.key2hash(pub)))
+    if (!utils.isEqual(s[2], bcoin.address.hash160(pub)))
       return false;
     // Already has a script template (at least)
     if (input.script.length)
@@ -403,7 +403,7 @@ TX.prototype.signInput = function signInput(index, key, type) {
 
   // Get pubkey and pubkey hash.
   pub = key.getPublic(true, 'array');
-  pkh = bcoin.wallet.key2hash(pub);
+  pkh = bcoin.address.hash160(pub);
 
   // Add signatures.
   if (bcoin.script.isPubkey(s)) {
@@ -731,13 +731,13 @@ TX.prototype.scriptOutput = function scriptOutput(index, options) {
     // https://github.com/bitcoin/bips/blob/master/bip-0016.mediawiki
     // hash160 [20-byte-redeemscript-hash] equal
     script = bcoin.script.createScripthash(
-      bcoin.wallet.addr2hash(options.address, 'scripthash')
+      bcoin.address.toHash(options.address, 'scripthash')
     );
   } else if (options.address) {
     // P2PKH Transaction
     // dup hash160 [pubkey-hash] equalverify checksig
     script = bcoin.script.createPubkeyhash(
-      bcoin.wallet.addr2hash(options.address, 'pubkeyhash')
+      bcoin.address.toHash(options.address, 'pubkeyhash')
     );
   } else if (options.key) {
     // P2PK Transaction
@@ -814,9 +814,6 @@ TX.prototype.signatureHash = function signatureHash(index, s, type) {
   // if strictenc is not enabled.
   // assert(utils.isFinite(type));
 
-  // Remove code separators.
-  // s = script.getSubscript(s);
-
   // Remove all signatures.
   for (i = 0; i < copy.inputs.length; i++)
     copy.inputs[i].script = [];
@@ -881,7 +878,7 @@ TX.prototype.tbsHash = function tbsHash(enc, force) {
 
   if (!this._tbsHash || force) {
     for (i = 0; i < copy.inputs.length; i++) {
-      if (!copy.isCoinbase())
+      if (!copy.inputs[i].isCoinbase())
         copy.inputs[i].script = [];
     }
 
@@ -1008,14 +1005,7 @@ TX.prototype.maxSize = function maxSize() {
     }
 
     // Byte for varint size of input script
-    if (size < 0xfd)
-      size += 0;
-    else if (size <= 0xffff)
-      size += 2;
-    else if (size <= 0xffffffff)
-      size += 4;
-    else
-      size += 8;
+    size += utils.sizeIntv(size);
 
     total += size;
   }
@@ -1027,7 +1017,7 @@ TX.prototype.getInputs = function getInputs(unspent, address, fee) {
   var tx = this.clone();
   var cost = tx.getOutputValue();
   var totalkb = 1;
-  var total = cost.addn(constants.tx.fee);
+  var total = cost.addn(constants.tx.minFee);
   var inputs = [];
   var lastAdded = 0;
   var size, newkb, change;
@@ -1042,18 +1032,25 @@ TX.prototype.getInputs = function getInputs(unspent, address, fee) {
     return a.height - b.height;
   });
 
-  function addInput(unspent) {
-    // Add new inputs until TX will have enough
-    // funds to cover both minimum post cost
-    // and fee.
-    var index = tx._addInput(unspent);
-    inputs.push(tx.inputs[index]);
-    lastAdded++;
-    return tx.getInputValue().cmp(total) < 0;
+  function addCoins() {
+    var i, index;
+
+    for (i = lastAdded; i < unspent.length; i++) {
+      // Add new inputs until TX will have enough
+      // funds to cover both minimum post cost
+      // and fee.
+      index = tx._addInput(unspent[i]);
+      inputs.push(tx.inputs[index]);
+      lastAdded++;
+
+      // Stop once we're full.
+      if (tx.getInputValue().cmp(total) >= 0)
+        break;
+    }
   }
 
   // Transfer `total` funds maximum.
-  unspent.every(addInput);
+  addCoins();
 
   if (!fee) {
     // Add dummy output (for `change`) to
@@ -1064,9 +1061,9 @@ TX.prototype.getInputs = function getInputs(unspent, address, fee) {
     });
 
     // if (this.subtractFee) {
-    //   var f = new bn((Math.ceil(tx.maxSize() / 1024) - 1) * constants.tx.fee);
+    //   var f = new bn((Math.ceil(tx.maxSize() / 1024) - 1) * constants.tx.minFee);
     //   for (var j = 0; j < this.outputs.length; j++) {
-    //     if (this.outputs[j].value.cmp(f.addn(constants.tx.dust)) >= 0) {
+    //     if (this.outputs[j].value.cmp(f.addn(constants.tx.dustThreshold)) >= 0) {
     //       this.outputs[j].value = this.outputs[j].value.sub(f);
     //       break;
     //     }
@@ -1081,12 +1078,12 @@ TX.prototype.getInputs = function getInputs(unspent, address, fee) {
       size = tx.maxSize();
 
       newkb = Math.ceil(size / 1024) - totalkb;
-      total.iaddn(newkb * constants.tx.fee);
+      total.iaddn(newkb * constants.tx.minFee);
       totalkb += newkb;
 
       // Failed to get enough funds, add more inputs.
       if (tx.getInputValue().cmp(total) < 0)
-        unspent.slice(lastAdded).every(addInput);
+        addCoins();
     } while (tx.getInputValue().cmp(total) < 0 && lastAdded < unspent.length);
   }
 
@@ -1134,7 +1131,7 @@ TX.prototype.fill = function fill(unspent, address, fee) {
     this.addInput(input);
   }, this);
 
-  if (result.change.cmpn(constants.tx.dust) < 0) {
+  if (result.change.cmpn(constants.tx.dustThreshold) < 0) {
     // Do nothing. Change is added to fee.
     assert.equal(
       this.getFee().toNumber(),
@@ -1210,7 +1207,7 @@ TX.prototype._recalculateFee = function recalculateFee() {
   }
 
   size = this.maxSize();
-  real = Math.ceil(size / 1024) * constants.tx.fee;
+  real = Math.ceil(size / 1024) * constants.tx.minFee;
   fee = this.getFee().toNumber();
 
   // if (this.hardFee)
@@ -1233,7 +1230,7 @@ TX.prototype._recalculateFee = function recalculateFee() {
     output.value.iaddn(fee - real);
   }
 
-  if (output.value.cmpn(constants.tx.dust) < 0) {
+  if (output.value.cmpn(constants.tx.dustThreshold) < 0) {
     this.outputs.pop();
     this.changeIndex = -1;
     return;
@@ -1428,15 +1425,22 @@ TX.prototype.setLocktime = function setLocktime(locktime) {
 };
 
 TX.prototype.increaseFee = function increaseFee(fee) {
-  var i, input;
+  var i, input, result;
+
+  this.inputs = [];
+
+  if (this.changeIndex !== -1)
+    this.outputs.splice(this.changeIndex, 1);
 
   this.hardFee = fee || this.getFee().add(new bn(10000));
-  this.fill();
+  result = this.fill();
 
   for (i = 0; i < this.inputs.length; i++) {
     input = this.inputs[i];
     input.sequence = 0xffffffff - 1;
   }
+
+  return !!result.inputs;
 };
 
 TX.prototype.hasPrevout = function hasPrevout() {
@@ -1559,7 +1563,7 @@ TX.prototype.isStandard = function isStandard() {
     if (type === 'multisig' && !constants.tx.bareMultisig)
       return false;
 
-    if (output.value.cmpn(constants.tx.dust) < 0)
+    if (output.value.cmpn(constants.tx.dustThreshold) < 0)
       return false;
   }
 
diff --git a/lib/bcoin/utils.js b/lib/bcoin/utils.js
index bd0d0430..df6b369d 100644
--- a/lib/bcoin/utils.js
+++ b/lib/bcoin/utils.js
@@ -797,7 +797,7 @@ utils.sortHDKeys = function sortHDKeys(keys) {
   });
 };
 
-utils.uniq = function(obj) {
+utils.uniq = function uniq(obj) {
   var out = [];
   var i = 0;
 
@@ -809,6 +809,22 @@ utils.uniq = function(obj) {
   return out;
 };
 
+utils.uniqs = function uniqs(obj) {
+  var table = {};
+  var out = [];
+  var i = 0;
+
+  for (; i < obj.length; i++) {
+    if (!table[obj[i]]) {
+      out.push(obj[i]);
+      table[obj[i]] = true;
+    }
+  }
+
+  return out;
+};
+
+
 utils.fromCompact = function fromCompact(compact) {
   var exponent = compact >> 24;
   var negative = (compact >> 23) & 0x01;
diff --git a/lib/bcoin/wallet.js b/lib/bcoin/wallet.js
index fad140d5..3fecf65d 100644
--- a/lib/bcoin/wallet.js
+++ b/lib/bcoin/wallet.js
@@ -77,6 +77,7 @@ function Wallet(options) {
   this.accountIndex = options.accountIndex || 0;
   this.addressDepth = options.addressDepth || 0;
   this.changeDepth = options.changeDepth || 0;
+  this.copayBIP45 = options.copayBIP45 || false;
   this.cosignerIndex = -1;
   this.sharedCosignerIndex = constants.hd.hardened - 1;
   this.purposeKeys = options.purposeKeys || [];
@@ -84,26 +85,21 @@ function Wallet(options) {
 
   this.hd = !!this.master;
   this.type = options.type || 'pubkeyhash';
-  this.subtype = options.subtype || null;
   this.derivation = options.derivation || null;
   this.compressed = options.compressed !== false;
   this.keys = [];
   this.m = options.m || 1;
   this.n = options.n || 1;
-  this.nmax = this.type === 'scripthash'
-    ? (this.compressed ? 15 : 7)
-    : 3;
 
-  if (this.n > 1) {
-    if (this.type !== 'multisig')
-      this.type = 'scripthash';
-    if (this.type === 'scripthash')
-      this.subtype = 'multisig';
-  }
+  if (this.n > 1)
+    this.type = 'multisig';
+
+  assert(this.type === 'pubkeyhash' || this.type === 'multisig');
+  this.prefixType = this.type === 'multisig' ? 'scripthash' : 'pubkeyhash';
 
   if (!this.derivation) {
     if (this.master) {
-      if (this.type === 'scripthash' && this.subtype === 'multisig')
+      if (this.type === 'multisig')
         this.derivation = 'bip45';
       else
         this.derivation = 'bip44';
@@ -112,15 +108,12 @@ function Wallet(options) {
     }
   }
 
-  if (network.prefixes[this.type] == null)
-    throw new Error('Unknown prefix: ' + this.type);
+  if (network.prefixes[this.prefixType] == null)
+    throw new Error('Unknown prefix: ' + this.prefixType);
 
   if (this.m < 1 || this.m > this.n)
     throw new Error('m ranges between 1 and n');
 
-  if (this.n < 1 || this.n > this.nmax)
-    throw new Error('n ranges between 1 and ' + this.nmax);
-
   if (this.derivation === 'bip45') {
     this.purposeKey = this.master.isPurpose45()
       ? this.master
@@ -140,7 +133,6 @@ function Wallet(options) {
       publicKey: options.publicKey,
       pair: options.pair,
       type: this.type,
-      subtype: this.subtype,
       m: this.m,
       n: this.n,
       keys: [],
@@ -162,23 +154,7 @@ function Wallet(options) {
   // generate the last receiving address. However, since "normal" wallets
   // cannot deterministically generate keys, we have to buffer the generated
   // key for later.
-  if (this.derivation === 'bip44') {
-    // Generate the last known receiving address
-    key = this.createKey(false, Math.max(0, this.addressDepth - 1));
-    this.currentAddress = bcoin.address({
-      privateKey: key.privateKey,
-      publicKey: key.publicKey,
-      compressed: key.compressed,
-      index: key.index,
-      path: key.path,
-      type: this.type,
-      subtype: this.subtype,
-      m: this.m,
-      n: this.n,
-      keys: options.keys,
-      derived: true
-    });
-  } else if (this.derivation === 'normal') {
+  if (this.derivation === 'normal') {
     // Try to find the last receiving address if there is one.
     receiving = options.addresses.filter(function(address) {
       return !address.change && this._isKeyOptions(address);
@@ -197,11 +173,11 @@ function Wallet(options) {
         index: key.index,
         path: key.path,
         type: this.type,
-        subtype: this.subtype,
         m: this.m,
         n: this.n,
         keys: options.keys
       });
+      this.currentAddress._wallet = this;
     }
   }
 
@@ -219,7 +195,7 @@ inherits(Wallet, EventEmitter);
 
 Wallet.prototype._pruneAddresses = function _pruneAddresses(options) {
   var addresses = this.addresses.slice();
-  var address;
+  var i, address;
 
   for (i = 0; i < addresses.length; i++) {
     address = addresses[i];
@@ -250,17 +226,17 @@ Wallet.prototype._isKeyOptions = function _isKeyOptions(options) {
 // normal: Address of first key in wallet
 Wallet.prototype.getID = function getID() {
   if (this.derivation === 'bip45')
-    return bcoin.address.key2addr(this.purposeKey.publicKey);
+    return bcoin.address.compile(this.purposeKey.publicKey);
 
   if (this.derivation === 'bip44')
-    return bcoin.address.key2addr(this.purposeKey.publicKey);
+    return bcoin.address.compile(this.purposeKey.publicKey);
 
   if (this.derivation === 'normal') {
     if (this.addresses.length)
       return this.addresses[0].getKeyAddress();
 
     if (this._firstKey)
-      return bcoin.address.key2addr(this._firstKey.publicKey);
+      return bcoin.address.compile(this._firstKey.publicKey);
   }
 
   assert(false);
@@ -316,6 +292,14 @@ Wallet.prototype._initAddresses = function _initAddresses() {
 Wallet.prototype.addKey = function addKey(key) {
   var hdKey, has, i;
 
+  if (key instanceof bcoin.wallet) {
+    assert(key.derivation === this.derivation);
+    if (key.derivation === 'bip44' || key.derivation === 'bip45')
+      key = key.purposeKey;
+    else
+      key = key.currentAddress.publicKey;
+  }
+
   if (bcoin.hd.privateKey.isExtended(key))
     key = bcoin.hd.privateKey(key);
   else if (bcoin.hd.publicKey.isExtended(key))
@@ -387,6 +371,7 @@ Wallet.prototype.finalizeKeys = function finalizeKeys(key) {
     for (i = 0; i < this.purposeKeys.length; i++) {
       if (this.purposeKeys[i].xpubkey === this.purposeKey.xpubkey) {
         this.cosignerIndex = i;
+        this._cosignerIndex = i;
         break;
       }
     }
@@ -394,6 +379,7 @@ Wallet.prototype.finalizeKeys = function finalizeKeys(key) {
     assert(this.cosignerIndex !== -1);
 
     this._initAddresses();
+
     return;
   }
 
@@ -402,6 +388,7 @@ Wallet.prototype.finalizeKeys = function finalizeKeys(key) {
   for (i = 0; i < this.keys.length; i++) {
     if (utils.isEqual(this.keys[i], this.currentAddress.publicKey)) {
       this.cosignerIndex = i;
+      this._cosignerIndex = i;
       break;
     }
   }
@@ -416,6 +403,14 @@ Wallet.prototype.removeKey = function removeKey(key) {
 
   assert(!this._keysFinalized);
 
+  if (key instanceof bcoin.wallet) {
+    assert(key.derivation === this.derivation);
+    if (key.derivation === 'bip44' || key.derivation === 'bip45')
+      key = key.purposeKey;
+    else
+      key = key.currentAddress.publicKey;
+  }
+
   if (bcoin.hd.privateKey.isExtended(key))
     key = bcoin.hd.privateKey(key);
   else if (bcoin.hd.publicKey.isExtended(key))
@@ -527,9 +522,7 @@ Wallet.prototype._getAddressTable = function() {
 
   for (i = 0; i < this.addresses.length; i++) {
     address = this.addresses[i];
-    if (address.type === 'scripthash')
-      addresses[address.getScriptAddress()] = i;
-    addresses[address.getKeyAddress()] = i;
+    addresses[address.getAddress()] = i;
   }
 
   return addresses;
@@ -545,20 +538,13 @@ Wallet.prototype._addressIndex = function _addressIndex(address) {
   if (!(address instanceof bcoin.address))
     address = bcoin.address(address);
 
-  if (address.type === 'scripthash') {
-    addr = address.getScriptAddress();
-    if (this._addressTable[addr] != null)
-      return this._addressTable[addr];
-  }
-
-  addr = address.getKeyAddress();
+  addr = address.getAddress();
   if (this._addressTable[addr] != null)
     return this._addressTable[addr];
 
   return -1;
 };
 
-// TODO: fromPath here
 Wallet.prototype.createAddress = function createAddress(change, index) {
   var self = this;
   var key = this.createKey(change, index);
@@ -573,7 +559,6 @@ Wallet.prototype.createAddress = function createAddress(change, index) {
     index: key.index,
     path: key.path,
     type: this.type,
-    subtype: this.subtype,
     m: this.m,
     n: this.n,
     keys: [],
@@ -610,7 +595,7 @@ Wallet.prototype.createAddress = function createAddress(change, index) {
     this.keys = utils.sortKeys(options.keys);
   } else if (this.derivation === 'normal') {
     this.keys.forEach(function(key, i) {
-      if (i !== this.cosignerIndex)
+      if (i !== this._cosignerIndex)
         options.keys.push(key);
     }, this);
     options.keys.push(key.publicKey);
@@ -658,10 +643,7 @@ Wallet.prototype.addAddress = function addAddress(address) {
     self.emit('add address', address);
   });
 
-  if (address.type === 'scripthash')
-    this._addressTable[address.getScriptAddress()] = index;
-
-  this._addressTable[address.getKeyAddress()] = index;
+  this._addressTable[address.getAddress()] = index;
 
   if (address.label && this._labelTable[address.label] == null)
     this._labelTable[address.label] = index;
@@ -832,30 +814,19 @@ Wallet.prototype.ownOutput = function ownOutput(tx, index) {
   return tx.testOutputs(this._addressTable, index, true);
 };
 
-Wallet.prototype.fill = function fill(tx, address, fee) {
-  var unspent, items, result;
+Wallet.prototype.fill = function fill(tx, options) {
+  var address, unspent;
+
+  if (!options)
+    options = {};
 
   assert(this._initialized);
 
-  if (!address)
-    address = this.changeAddress.getKeyAddress();
+  address = this.changeAddress.getAddress();
 
   unspent = this.getUnspent();
 
-  items = unspent.filter(function(coin) {
-    if (bcoin.script.isScripthash(coin.script))
-      return this.type === 'scripthash';
-
-    if (bcoin.script.isMultisig(coin.script))
-      return this.type === 'multisig';
-
-    return true;
-  }, this);
-
-  if (tx.getInputs(unspent, address, fee).inputs)
-    unspent = items;
-
-  result = tx.fill(unspent, address, fee);
+  result = tx.fill(unspent, address, options.fee);
 
   if (!result.inputs)
     return false;
@@ -1040,14 +1011,13 @@ Wallet.prototype.toJSON = function toJSON(encrypt) {
     name: 'wallet',
     network: network.type,
     type: this.type,
-    subtype: this.subtype,
     m: this.m,
     n: this.n,
     derivation: this.derivation,
+    copayBIP45: this.copayBIP45,
     accountIndex: this.accountIndex,
     addressDepth: this.addressDepth,
     changeDepth: this.changeDepth,
-    cosignerIndex: this.cosignerIndex,
     master: this.master ? this.master.toJSON(encrypt) : null,
     addresses: this.addresses.filter(function(address) {
       return !address.derived;
@@ -1077,14 +1047,13 @@ Wallet.fromJSON = function fromJSON(json, decrypt) {
 
   wallet = new Wallet({
     type: json.type,
-    subtype: json.subtype,
     m: json.m,
     n: json.n,
     derivation: json.derivation,
+    copayBIP45: json.copayBIP45,
     accountIndex: json.accountIndex,
     addressDepth: json.addressDepth,
     changeDepth: json.changeDepth,
-    cosignerIndex: json.cosignerIndex,
     master: json.master
       ? bcoin.hd.fromJSON(json.master, decrypt)
       : null,
@@ -1109,19 +1078,19 @@ Wallet.fromSecret = function fromSecret(privateKey) {
 };
 
 Wallet.key2hash = function key2hash(key) {
-  return bcoin.address.key2hash(key);
+  return bcoin.address.hash160(key);
 };
 
 Wallet.hash2addr = function hash2addr(hash, prefix) {
-  return bcoin.address.hash2addr(hash, prefix);
+  return bcoin.address.toAddress(hash, prefix);
 };
 
 Wallet.addr2hash = function addr2hash(addr, prefix) {
-  return bcoin.address.addr2hash(addr, prefix);
+  return bcoin.address.toHash(addr, prefix);
 };
 
 Wallet.validateAddress = function validateAddress(addr, prefix) {
-  return bcoin.address.validateAddress(addr, prefix);
+  return bcoin.address.validate(addr, prefix);
 };
 
 /**
diff --git a/test/wallet-test.js b/test/wallet-test.js
index 52b05485..74fb1674 100644
--- a/test/wallet-test.js
+++ b/test/wallet-test.js
@@ -81,7 +81,7 @@ describe('Wallet', function() {
     // var k2 = w.getPublicKey().concat(1);
     var k2 = bcoin.ecdsa.genKeyPair().getPublic(true, 'array');
     w.addKey(k2);
-    assert.equal(w.getKeyAddress(), w.getAddress());
+    // assert.equal(w.getKeyAddress(), w.getAddress());
 
     // Input transcation
     var src = bcoin.tx({
@@ -222,7 +222,7 @@ describe('Wallet', function() {
     tx.out(to, 5460);
 
     var cost = tx.funds('out');
-    var total = cost.add(new bn(constants.tx.fee));
+    var total = cost.add(new bn(constants.tx.minFee));
 
     var unspent1 = w1.unspent();
     var unspent2 = w2.unspent();
@@ -236,7 +236,7 @@ describe('Wallet', function() {
     tx.input(unspent2[0]);
 
     var left = tx.funds('in').sub(total);
-    if (left.cmpn(constants.tx.dust) < 0) {
+    if (left.cmpn(constants.tx.dustThreshold) < 0) {
       tx.outputs[tx.outputs.length - 2].value.iadd(left);
       left = new bn(0);
     }
@@ -270,37 +270,35 @@ describe('Wallet', function() {
     // Create 3 2-of-3 wallets with our pubkeys as "shared keys"
     var w1 = bcoin.wallet({
       derivation: 'bip44',
-      type: 'scripthash',
-      subtype: 'multisig',
+      type: 'multisig',
       m: 2,
       n: 3
     });
 
     var w2 = bcoin.wallet({
       derivation: 'bip44',
-      type: 'scripthash',
-      subtype: 'multisig',
+      type: 'multisig',
       m: 2,
       n: 3
     });
 
     var w3 = bcoin.wallet({
       derivation: 'bip44',
-      type: 'scripthash',
-      subtype: 'multisig',
+      type: 'multisig',
       m: 2,
       n: 3
     });
-    // w3 = bcoin.wallet.fromJSON(w3.toJSON());
 
     var receive = bcoin.wallet();
 
-    w1.addKey(w2.purposeKey);
-    w1.addKey(w3.purposeKey);
-    w2.addKey(w1.purposeKey);
-    w2.addKey(w3.purposeKey);
-    w3.addKey(w1.purposeKey);
-    w3.addKey(w2.purposeKey);
+    w1.addKey(w2);
+    w1.addKey(w3);
+    w2.addKey(w1);
+    w2.addKey(w3);
+    w3.addKey(w1);
+    w3.addKey(w2);
+
+    w3 = bcoin.wallet.fromJSON(w3.toJSON());
 
     // Our p2sh address
     var addr = w1.getAddress();