diff --git a/lib/bcoin/address.js b/lib/bcoin/address.js
index 5e5bdaa0..816724cf 100644
--- a/lib/bcoin/address.js
+++ b/lib/bcoin/address.js
@@ -233,6 +233,7 @@ Address.fromRaw = function fromRaw(data) {
  */
 
 Address.prototype.fromBase58 = function fromBase58(data) {
+  assert(typeof data === 'string');
   return this.fromRaw(utils.fromBase58(data));
 };
 
diff --git a/lib/bcoin/fullnode.js b/lib/bcoin/fullnode.js
index b81e15ab..975f051b 100644
--- a/lib/bcoin/fullnode.js
+++ b/lib/bcoin/fullnode.js
@@ -306,19 +306,8 @@ Fullnode.prototype._open = function open(callback) {
       self.walletdb.rescan(self.chain.db, next);
     },
     function(next) {
-      var i;
-      self.wallet.getUnconfirmed(function(err, txs) {
-        if (err)
-          return next(err);
-
-        if (txs.length > 0)
-          self.logger.info('Rebroadcasting %d transactions.', txs.length);
-
-        for (i = 0; i < txs.length; i++)
-          self.pool.broadcast(txs[i]);
-
-        next();
-      });
+      // Rebroadcast pending transactions.
+      self.wallet.resend(next);
     },
     function(next) {
       if (!self.http)
diff --git a/lib/bcoin/http/client.js b/lib/bcoin/http/client.js
index bdef1aaf..20f9ba18 100644
--- a/lib/bcoin/http/client.js
+++ b/lib/bcoin/http/client.js
@@ -287,7 +287,7 @@ HTTPClient.prototype.getInfo = function getInfo(callback) {
  */
 
 HTTPClient.prototype.getCoinsByAddress = function getCoinsByAddress(address, callback) {
-  var body = { addresses: address };
+  var body = { address: address };
 
   return this._post('/coin/address', body, callback);
 };
@@ -312,7 +312,7 @@ HTTPClient.prototype.getCoin = function getCoin(hash, index, callback) {
  */
 
 HTTPClient.prototype.getTXByAddress = function getTXByAddress(address, callback) {
-  var body = { addresses: address };
+  var body = { address: address };
 
   return this._post('/tx/address', body, callback);
 };
diff --git a/lib/bcoin/http/server.js b/lib/bcoin/http/server.js
index 23116a67..62a352f6 100644
--- a/lib/bcoin/http/server.js
+++ b/lib/bcoin/http/server.js
@@ -43,9 +43,13 @@ function HTTPServer(options) {
   assert(this.node, 'HTTP requires a Node.');
 
   this.network = this.node.network;
-  this.walletdb = this.node.walletdb;
+  this.chain = this.node.chain;
   this.mempool = this.node.mempool;
   this.pool = this.node.pool;
+  this.fees = this.node.fees;
+  this.miner = this.node.miner;
+  this.wallet = this.node.wallet;
+  this.walletdb = this.node.walletdb;
   this.logger = options.logger || this.node.logger;
   this.loaded = false;
   this.apiKey = options.apiKey;
@@ -102,8 +106,8 @@ HTTPServer.prototype._init = function _init() {
     res.setHeader('X-Bcoin-Version', constants.USER_VERSION);
     res.setHeader('X-Bcoin-Agent', constants.USER_AGENT);
     res.setHeader('X-Bcoin-Network', self.network.type);
-    res.setHeader('X-Bcoin-Height', self.node.chain.height + '');
-    res.setHeader('X-Bcoin-Tip', utils.revHex(self.node.chain.tip.hash));
+    res.setHeader('X-Bcoin-Height', self.chain.height + '');
+    res.setHeader('X-Bcoin-Tip', utils.revHex(self.chain.tip.hash));
 
     next();
   });
@@ -157,109 +161,184 @@ HTTPServer.prototype._init = function _init() {
   });
 
   this.use(function(req, res, next, send) {
-    var params, options;
+    var i, params, options, output, address;
 
-    if (req.method === 'POST'
-        && req.pathname === '/') {
+    if (req.method === 'POST' && req.pathname === '/') {
+      assert(typeof req.body.method === 'string', 'Method must be a string.');
+      assert(Array.isArray(req.body.params), 'Params must be an array.');
       req.options = {};
       return next();
     }
 
-    params = utils.merge({}, req.params, req.query, req.body);
+    params = {};
     options = {};
 
+    softMerge(params, req.params, true);
+    softMerge(params, req.query, true);
+    softMerge(params, req.body);
+
     self.logger.debug('Params:');
     self.logger.debug(params);
 
     if (params.id) {
-      assert(params.id !== '!all');
+      assert(typeof params.id === 'string', 'ID must be a string.');
       options.id = params.id;
     }
 
     if (params.hash) {
-      if (params.hash.length !== 64)
-        options.height = params.hash >>> 0;
-      else
+      assert(typeof params.hash === 'string', 'Hash must be a string.');
+      if (params.hash.length !== 64) {
+        options.height = Number(params.hash);
+        assert(utils.isUInt32(options.height), 'Hash must be a number.');
+      } else {
         options.hash = utils.revHex(params.hash);
+      }
     }
 
-    if (params.index != null)
-      options.index = params.index >>> 0;
+    if (params.index != null) {
+      options.index = Number(params.index);
+      assert(utils.isUInt32(options.index), 'Index must be a number.');
+    }
 
-    if (params.height != null)
-      options.height = params.height >>> 0;
+    if (params.height != null) {
+      options.height = Number(params.height);
+      assert(utils.isUInt32(options.height), 'Height must be a number.');
+    }
 
-    if (params.start != null)
-      options.start = params.start >>> 0;
+    if (params.start != null) {
+      options.start = Number(params.start);
+      assert(utils.isUInt32(options.height), 'Start must be a number.');
+    }
 
-    if (params.end != null)
-      options.end = params.end >>> 0;
+    if (params.end != null) {
+      options.end = Number(params.end);
+      assert(utils.isUInt32(options.end), 'End must be a number.');
+    }
 
-    if (params.limit != null)
-      options.limit = params.limit >>> 0;
+    if (params.limit != null) {
+      options.limit = Number(params.limit);
+      assert(utils.isUInt32(options.limit), 'Limit must be a number.');
+    }
 
-    if (params.address) {
-      params.addresses = params.address;
-      options.address = params.address;
+    if (params.age != null) {
+      options.age = Number(params.age);
+      assert(utils.isUInt32(options.age), 'Age must be a number.');
     }
 
     if (params.rate)
       options.rate = utils.satoshi(params.rate);
 
-    if (params.subtractFee)
-      options.subtractFee = params.subtractFee;
-
-    if (Array.isArray(params.outputs)) {
-      options.outputs = params.outputs.map(function(output) {
-        return {
-          address: output.address,
-          script: decodeScript(output.script),
-          value: utils.satoshi(output.value)
-        };
-      });
+    if (params.m != null) {
+      options.m = Number(params.m);
+      assert(utils.isUInt32(options.m), 'm must be a number.');
     }
 
-    if (params.addresses) {
-      if (typeof params.addresses === 'string')
-        options.addresses = params.addresses.split(',');
-      else
-        options.addresses = params.addresses;
+    if (params.n != null) {
+      options.n = Number(params.n);
+      assert(utils.isUInt32(options.n), 'n must be a number.');
     }
 
-    if (params.tx) {
-      try {
-        if (typeof params.tx === 'object')
-          options.tx = bcoin.tx.fromJSON(params.tx);
-        else
-          options.tx = bcoin.tx.fromRaw(params.tx, 'hex');
-      } catch (e) {
-        return next(e);
+    if (params.blocks != null) {
+      options.blocks = Number(params.blocks);
+      assert(utils.isUInt32(options.blocks), 'Blocks must be a number.');
+    }
+
+    if (params.subtractFee != null) {
+      if (typeof params.subtractFee === 'number') {
+        options.subtractFee = params.subtractFee;
+        assert(utils.isUInt32(options.subtractFee), 'subtractFee must be a number.');
+      } else if (params.subtractFee === 'true') {
+        options.subtractFee = true;
+      } else {
+        assert(typeof options.subtractFee === 'boolean', 'subtractFee must be a boolean.');
+        options.subtractFee = params.subtractFee;
       }
     }
 
-    if (typeof params.account === 'string')
-      options.account = params.account || null;
-    else if (typeof params.account === 'number')
-      options.account = params.account;
+    if (params.outputs) {
+      assert(Array.isArray(params.outputs), 'Outputs must be an array.');
+      options.outputs = [];
+      for (i = 0; i < params.outputs.length; i++) {
+        output = params.outputs[i];
 
-    if (params.name)
-      options.name = params.name;
+        if (output.address)
+          assert(typeof output.address === 'string', 'Address must be a string.');
+        else if (output.script)
+          assert(typeof output.script === 'string', 'Script must be a string.');
+        else
+          assert(false, 'No address or script present.');
 
-    if (params.age)
-      options.age = params.age >>> 0;
-
-    if (params.key)
-      params.keys = params.key;
-
-    if (params.keys) {
-      if (typeof params.keys === 'string')
-        options.keys = params.keys.split(',');
-      else
-        options.keys = params.keys;
+        options.outputs.push({
+          address: output.address
+            ? bcoin.address.fromBase58(output.address)
+            : null,
+          script: output.script
+            ? bcoin.script.fromRaw(output.script, 'hex')
+            : null,
+          value: utils.satoshi(output.value)
+        });
+      }
     }
 
-    if (params.passphrase)
+    if (params.address) {
+      if (Array.isArray(options.address)) {
+        options.address = [];
+        for (i = 0; i < params.address.length; i++) {
+          address = params.address[i];
+          assert(typeof address === 'string', 'Address must be a string.');
+          address = bcoin.address.fromBase58(address);
+        }
+      } else {
+        assert(typeof params.address === 'string', 'Address must be a string.');
+        options.address = bcoin.address.fromBase58(params.address);
+      }
+    }
+
+    if (params.tx) {
+      if (typeof params.tx === 'object') {
+        options.tx = bcoin.tx.fromJSON(params.tx);
+      } else {
+        assert(typeof params.tx === 'string', 'TX must be a hex string.');
+        options.tx = bcoin.tx.fromRaw(params.tx, 'hex');
+      }
+    }
+
+    if (params.account != null) {
+      if (typeof params.account === 'number') {
+        options.account = params.account;
+        assert(utils.isUInt32(options.account), 'Account must be a number.');
+      } else {
+        assert(typeof params.account === 'string', 'Account must be a string.');
+        options.account = params.account;
+      }
+    }
+
+    if (params.type) {
+      assert(typeof params.type === 'string', 'Type must be a string.');
+      options.type = params.type;
+    }
+
+    if (params.name) {
+      assert(typeof params.name === 'string', 'Name must be a string.');
+      options.name = params.name;
+    }
+
+    if (params.key) {
+      assert(typeof params.key === 'string', 'Key must be a string.');
+      options.key = params.key;
+    }
+
+    if (params.old) {
+      assert(typeof params.old === 'string', 'Passphrase must be a string.');
+      assert(params.old.length > 0, 'Passphrase must be a string.');
+      options.old = params.old;
+    }
+
+    if (params.passphrase) {
+      assert(typeof params.passphrase === 'string', 'Passphrase must be a string.');
+      assert(params.passphrase.length > 0, 'Passphrase must be a string.');
       options.passphrase = params.passphrase;
+    }
 
     if (params.token) {
       assert(utils.isHex(params.token), 'API key must be a hex string.');
@@ -307,19 +386,8 @@ HTTPServer.prototype._init = function _init() {
     });
   });
 
-  function decodeScript(script) {
-    if (!script)
-      return;
-    if (typeof script === 'string')
-      return bcoin.script.fromRaw(script, 'hex');
-    return new bcoin.script(script);
-  }
-
   // JSON RPC
   this.post('/', function(req, res, next, send) {
-    if (!(req.body.method && req.body.params))
-      return next(new Error('Method not found.'));
-
     if (!self.rpc) {
       RPC = require('./rpc');
       self.rpc = new RPC(self.node);
@@ -359,23 +427,21 @@ HTTPServer.prototype._init = function _init() {
     send(200, {
       version: constants.USER_VERSION,
       agent: constants.USER_AGENT,
+      services: self.pool.services,
       network: self.network.type,
-      height: self.node.chain.height,
-      tip: utils.revHex(self.node.chain.tip.hash),
-      peers: self.node.pool.peers.all.length,
-      progress: self.node.chain.getProgress()
+      height: self.chain.height,
+      tip: self.chain.tip.rhash,
+      peers: self.pool.peers.all.length,
+      progress: self.chain.getProgress()
     });
   });
 
   // UTXO by address
   this.get('/coin/address/:address', function(req, res, next, send) {
-    self.node.getCoinsByAddress(req.options.addresses, function(err, coins) {
+    self.node.getCoinsByAddress(req.options.address, function(err, coins) {
       if (err)
         return next(err);
 
-      if (!coins.length)
-        return send(404);
-
       send(200, coins.map(function(coin) {
         return coin.toJSON();
       }));
@@ -397,13 +463,10 @@ HTTPServer.prototype._init = function _init() {
 
   // Bulk read UTXOs
   this.post('/coin/address', function(req, res, next, send) {
-    self.node.getCoinsByAddress(req.options.addresses, function(err, coins) {
+    self.node.getCoinsByAddress(req.options.address, function(err, coins) {
       if (err)
         return next(err);
 
-      if (!coins.length)
-        return send(404);
-
       send(200, coins.map(function(coin) {
         return coin.toJSON();
       }));
@@ -430,7 +493,7 @@ HTTPServer.prototype._init = function _init() {
 
   // TX by address
   this.get('/tx/address/:address', function(req, res, next, send) {
-    self.node.getTXByAddress(req.options.addresses, function(err, txs) {
+    self.node.getTXByAddress(req.options.address, function(err, txs) {
       if (err)
         return next(err);
 
@@ -449,13 +512,10 @@ HTTPServer.prototype._init = function _init() {
 
   // Bulk read TXs
   this.post('/tx/address', function(req, res, next, send) {
-    self.node.getTXByAddress(req.options.addresses, function(err, txs) {
+    self.node.getTXByAddress(req.options.address, function(err, txs) {
       if (err)
         return next(err);
 
-      if (!txs.length)
-        return send(404);
-
       utils.forEachSerial(txs, function(tx, next) {
         self.node.fillHistory(tx, next);
       }, function(err) {
@@ -485,13 +545,10 @@ HTTPServer.prototype._init = function _init() {
 
   // Mempool snapshot
   this.get('/mempool', function(req, res, next, send) {
-    self.node.mempool.getHistory(function(err, txs) {
+    self.mempool.getHistory(function(err, txs) {
       if (err)
         return next(err);
 
-      if (!txs.length)
-        return send(404);
-
       utils.forEachSerial(txs, function(tx, next) {
         self.node.fillHistory(tx, next);
       }, function(err) {
@@ -515,6 +572,12 @@ HTTPServer.prototype._init = function _init() {
     });
   });
 
+  // Estimate fee
+  this.get('/fee', function(req, res, next, send) {
+    var fee = self.fees.estimateFee(req.options.blocks);
+    send(200, { rate: utils.btc(fee) });
+  });
+
   // Get wallet
   this.get('/wallet/:id', function(req, res, next, send) {
     send(200, req.wallet.toJSON());
@@ -645,6 +708,19 @@ HTTPServer.prototype._init = function _init() {
     });
   });
 
+  // Abandon Wallet TX
+  this.del('/wallet/:id/tx/:hash', function(req, res, next, send) {
+    var hash = req.options.hash;
+    var account = req.options.account;
+
+    req.wallet.abandon(hash, function(err) {
+      if (err)
+        return next(err);
+
+      send(200, { success: true });
+    });
+  });
+
   // Add key
   this.put('/wallet/:id/key', function(req, res, next, send) {
     var account = req.options.account;
@@ -672,7 +748,7 @@ HTTPServer.prototype._init = function _init() {
   // Create address
   this.post('/wallet/:id/address', function(req, res, next, send) {
     var account = req.options.account;
-    req.wallet.createAddress(account, false, function(err, address) {
+    req.wallet.createReceive(account, function(err, address) {
       if (err)
         return next(err);
 
@@ -832,29 +908,32 @@ HTTPServer.prototype._initIO = function _initIO() {
   if (!this.server.io)
     return;
 
-  this.server.on('websocket', function(socket) {
-    socket.bcoin = new ClientSocket(self, socket);
-    socket.bcoin.startTimeout();
+  this.server.on('websocket', function(ws) {
+    var socket = new ClientSocket(self, ws);
+
+    socket.start();
 
     socket.on('error', function(err) {
       self.emit('error', err);
     });
 
-    socket.on('auth', function(apiKey, callback) {
-      callback = utils.ensure(callback);
+    socket.once('auth', function(apiKey, callback) {
+      if (typeof callback !== 'function')
+        return socket.destroy();
 
-      if (!self.apiHash) {
-        self.logger.info('Successful auth.');
-        socket.bcoin.stopTimeout();
-        self.emit('websocket', socket);
-        return callback();
+      socket.stop();
+
+      if (self.apiHash) {
+        if (!utils.ccmp(hash256(apiKey), self.apiHash)) {
+          socket.destroy();
+          return callback({ error: 'Bad key.' });
+        }
       }
 
-      if (!utils.ccmp(hash256(apiKey), self.apiHash))
-        return callback({ error: 'Bad key.' });
+      socket.auth = true;
+
+      self.logger.info('Successful auth from %s.', socket.host);
 
-      self.logger.info('Successful auth.');
-      socket.bcoin.stopTimeout();
       self.emit('websocket', socket);
 
       return callback();
@@ -869,13 +948,20 @@ HTTPServer.prototype._initIO = function _initIO() {
 
   this.on('websocket', function(socket) {
     socket.on('wallet join', function(id, token, callback) {
-      callback = utils.ensure(callback);
+      if (typeof callback !== 'function')
+        return socket.destroy();
+
+      if (typeof id !== 'string')
+        return callback({ error: 'Invalid parameter.' });
 
       if (!self.options.walletAuth) {
         socket.join(id);
         return callback();
       }
 
+      if (typeof token !== 'string')
+        return callback({ error: 'Invalid parameter.' });
+
       self.walletdb.auth(id, token, function(err, wallet) {
         if (err) {
           self.logger.info('Wallet auth failure for %s: %s.', id, err.message);
@@ -886,14 +972,22 @@ HTTPServer.prototype._initIO = function _initIO() {
           return callback({ error: 'Wallet does not exist.' });
 
         self.logger.info('Successful wallet auth for %s.', id);
+
         socket.join(id);
+
         return callback();
       });
     });
 
     socket.on('wallet leave', function(id, callback) {
-      callback = utils.ensure(callback);
+      if (typeof callback !== 'function')
+        return socket.destroy();
+
+      if (typeof id !== 'string')
+        return callback({ error: 'Invalid parameter.' });
+
       socket.leave(id);
+
       return callback();
     });
   });
@@ -1034,20 +1128,57 @@ HTTPServer.prototype.listen = function listen(port, host, callback) {
  */
 
 function ClientSocket(server, socket) {
+  if (!(this instanceof ClientSocket))
+    return new ClientSocket(server, socket);
+
+  EventEmitter.call(this);
+
   this.server = server;
   this.socket = socket;
+  this.host = socket.conn.remoteAddress;
   this.timeout = null;
+  this.auth = false;
+
+  this._init();
 }
 
-ClientSocket.prototype.startTimeout = function startTimeout() {
+utils.inherits(ClientSocket, EventEmitter);
+
+ClientSocket.prototype._init = function _init() {
   var self = this;
-  this.stopTimeout();
+  var socket = this.socket;
+  var emit = EventEmitter.prototype.emit;
+  var onevent = socket.onevent.bind(socket);
+  socket.onevent = function(packet) {
+    var result = onevent(packet);
+    var args = packet.data || [];
+    emit.apply(self, args);
+    return result;
+  };
+};
+
+ClientSocket.prototype.join = function join(id) {
+  this.socket.join(id);
+};
+
+ClientSocket.prototype.leave = function leave(id) {
+  this.socket.leave(id);
+};
+
+ClientSocket.prototype.emit = function emit() {
+  this.socket.emit.apply(this.socket, arguments);
+};
+
+ClientSocket.prototype.start = function start() {
+  var self = this;
+  this.stop();
   this.timeout = setTimeout(function() {
+    self.timeout = null;
     self.destroy();
   }, 60000);
 };
 
-ClientSocket.prototype.stopTimeout = function stopTimeout() {
+ClientSocket.prototype.stop = function stop() {
   if (this.timeout != null) {
     clearTimeout(this.timeout);
     this.timeout = null;
@@ -1055,6 +1186,7 @@ ClientSocket.prototype.stopTimeout = function stopTimeout() {
 };
 
 ClientSocket.prototype.destroy = function() {
+  this.stop();
   this.socket.disconnect();
 };
 
@@ -1070,6 +1202,17 @@ function hash256(data) {
   return utils.hash256(new Buffer(data, 'utf8'));
 }
 
+function softMerge(a, b, soft) {
+  var keys = Object.keys(b);
+  var i, key, value;
+  for (i = 0; i < keys.length; i++) {
+    key = keys[i];
+    value = b[key];
+    if (!soft || value)
+      a[key] = value;
+  }
+}
+
 /*
  * Expose
  */
diff --git a/lib/bcoin/spvnode.js b/lib/bcoin/spvnode.js
index 6d45c10f..5c5b465b 100644
--- a/lib/bcoin/spvnode.js
+++ b/lib/bcoin/spvnode.js
@@ -212,19 +212,8 @@ SPVNode.prototype._open = function open(callback) {
       });
     },
     function(next) {
-      var i;
-      self.wallet.getUnconfirmed(function(err, txs) {
-        if (err)
-          return next(err);
-
-        if (txs.length > 0)
-          self.logger.info('Rebroadcasting %d transactions.', txs.length);
-
-        for (i = 0; i < txs.length; i++)
-          self.pool.broadcast(txs[i]);
-
-        next();
-      });
+      // Rebroadcast pending transactions.
+      self.wallet.resend(next);
     },
     function(next) {
       if (!self.http)
diff --git a/lib/bcoin/wallet.js b/lib/bcoin/wallet.js
index 0ca763d5..23b3d16c 100644
--- a/lib/bcoin/wallet.js
+++ b/lib/bcoin/wallet.js
@@ -915,11 +915,34 @@ Wallet.prototype.send = function send(options, callback) {
   }, true);
 };
 
+/**
+ * Resend pending wallet transactions.
+ * @param {Function} callback
+ */
+
+Wallet.prototype.resend = function resend(callback) {
+  var self = this;
+  var i;
+
+  this.getUnconfirmed(function(err, txs) {
+    if (err)
+      return callback(err);
+
+    if (txs.length > 0)
+      self.logger.info('Rebroadcasting %d transactions.', txs.length);
+
+    for (i = 0; i < txs.length; i++)
+      self.db.emit('send', txs[i]);
+
+    return callback();
+  });
+};
+
 /**
  * Derive necessary addresses for signing a transaction.
  * @param {TX|Input} tx
  * @param {Number?} index - Input index.
- * @returns {KeyRing[]}
+ * @param {Function} callback - Returns [Error, {@link KeyRing}[]].
  */
 
 Wallet.prototype.deriveInputs = function deriveInputs(tx, callback) {