diff --git a/lib/bcoin/abstractblock.js b/lib/bcoin/abstractblock.js
index fd13e690..1b1a0272 100644
--- a/lib/bcoin/abstractblock.js
+++ b/lib/bcoin/abstractblock.js
@@ -31,6 +31,8 @@ function AbstractBlock(data) {
 
   this.valid = null;
   this._hash = null;
+
+  this.txs = null;
 }
 
 AbstractBlock.prototype.hash = function hash(enc) {
@@ -82,6 +84,18 @@ AbstractBlock.prototype.isGenesis = function isGenesis() {
   return this.hash('hex') === network.genesis.hash;
 };
 
+AbstractBlock.prototype.setHeight = function setHeight(height) {
+  var i;
+
+  this.height = height;
+
+  if (!this.txs)
+    return;
+
+  for (i = 0; i < this.txs.length; i++)
+    this.txs[i].height = height;
+};
+
 AbstractBlock.prototype.__defineGetter__('rhash', function() {
   return utils.revHex(this.hash('hex'));
 });
diff --git a/lib/bcoin/address.js b/lib/bcoin/address.js
index 02fd07d4..25e8b386 100644
--- a/lib/bcoin/address.js
+++ b/lib/bcoin/address.js
@@ -16,6 +16,8 @@ var BufferReader = require('./reader');
  */
 
 function Address(options) {
+  var i;
+
   if (!(this instanceof Address))
     return new Address(options);
 
@@ -51,9 +53,10 @@ function Address(options) {
 
   this.addKey(this.getPublicKey());
 
-  (options.keys || []).forEach(function(key) {
-    this.addKey(key);
-  }, this);
+  if (options.keys) {
+    for (i = 0; i < options.keys.length; i++)
+      this.addKey(options.keys[i]);
+  }
 }
 
 Address.isAddress = function isAddress(obj) {
@@ -284,30 +287,34 @@ Address.prototype.ownOutput = function ownOutput(tx, index) {
 };
 
 Address.prototype.scriptInputs = function scriptInputs(tx, index) {
-  var self = this;
+  var total = 0;
+  var i, input;
 
   if (index && typeof index === 'object')
     index = tx.inputs.indexOf(index);
 
-  return tx.inputs.reduce(function(total, input, i) {
+  for (i = 0; i < tx.inputs.length; i++) {
+    input = tx.inputs[i];
+
     if (index != null && index !== i)
-      return total;
+      continue;
 
     if (!input.coin)
-      return total;
+      continue;
 
-    if (!self.ownOutput(input.coin))
-      return total;
+    if (!this.ownOutput(input.coin))
+      continue;
 
-    if (tx.scriptInput(i, self))
+    if (tx.scriptInput(i, this))
       total++;
+  }
 
-    return total;
-  }, 0);
+  return total;
 };
 
 Address.prototype.signInputs = function signInputs(tx, type, index) {
-  var self = this;
+  var total = 0;
+  var i, input;
 
   if (index && typeof index === 'object')
     index = tx.inputs.indexOf(index);
@@ -315,25 +322,28 @@ Address.prototype.signInputs = function signInputs(tx, type, index) {
   if (!this.key.privateKey)
     return 0;
 
-  return tx.inputs.reduce(function(total, input, i) {
+  for (i = 0; i < tx.inputs.length; i++) {
+    input = tx.inputs[i];
+
     if (index != null && index !== i)
-      return total;
+      continue;
 
     if (!input.coin)
-      return total;
+      continue;
 
-    if (!self.ownOutput(input.coin))
-      return total;
+    if (!this.ownOutput(input.coin))
+      continue;
 
-    if (tx.signInput(i, self, type))
+    if (tx.signInput(i, this, type))
       total++;
+  }
 
-    return total;
-  }, 0);
+  return total;
 };
 
 Address.prototype.sign = function sign(tx, type, index) {
-  var self = this;
+  var total = 0;
+  var i, input;
 
   if (index && typeof index === 'object')
     index = tx.inputs.indexOf(index);
@@ -341,23 +351,23 @@ Address.prototype.sign = function sign(tx, type, index) {
   if (!this.key.privateKey)
     return 0;
 
-  // Add signature script to each input
-  return tx.inputs.reduce(function(total, input, i) {
+  for (i = 0; i < tx.inputs.length; i++) {
+    input = tx.inputs[i];
+
     if (index != null && index !== i)
-      return total;
+      continue;
 
-    // Filter inputs that this wallet own
     if (!input.coin)
-      return total;
+      continue;
 
-    if (!self.ownOutput(input.coin))
-      return total;
+    if (!this.ownOutput(input.coin))
+      continue;
 
-    if (tx.sign(i, self, type))
+    if (tx.sign(i, this, type))
       total++;
+  }
 
-    return total;
-  }, 0);
+  return total;
 };
 
 Address.prototype.__defineGetter__('privateKey', function() {
diff --git a/lib/bcoin/block.js b/lib/bcoin/block.js
index 16d4a63c..0a8e74bf 100644
--- a/lib/bcoin/block.js
+++ b/lib/bcoin/block.js
@@ -461,6 +461,10 @@ Block.fromCompact = function fromCompact(buf) {
   };
 };
 
+Block.prototype.toMerkle = function toMerkle(filter) {
+  return bcoin.merkleblock.fromBlock(this, filter);
+};
+
 Block.isBlock = function isBlock(obj) {
   return obj
     && typeof obj.merkleRoot === 'string'
diff --git a/lib/bcoin/chain.js b/lib/bcoin/chain.js
index 51558ec5..6618528d 100644
--- a/lib/bcoin/chain.js
+++ b/lib/bcoin/chain.js
@@ -1183,10 +1183,7 @@ Chain.prototype.add = function add(block, callback, force) {
         // Update the block height early
         // Some things in verifyContext may
         // need access to height on txs.
-        block.height = height;
-        block.txs.forEach(function(tx) {
-          tx.height = height;
-        });
+        block.setHeight(height);
 
         // Do "contextual" verification on our block
         // now that we're certain its previous
@@ -1197,10 +1194,7 @@ Chain.prototype.add = function add(block, callback, force) {
           if (err) {
             // Couldn't verify block.
             // Revert the height.
-            block.height = -1;
-            block.txs.forEach(function(tx) {
-              tx.height = -1;
-            });
+            block.setHeight(-1);
 
             if (err.type === 'VerifyError') {
               self.invalid[hash] = true;
diff --git a/lib/bcoin/mtx.js b/lib/bcoin/mtx.js
index 05e627c6..a38804fc 100644
--- a/lib/bcoin/mtx.js
+++ b/lib/bcoin/mtx.js
@@ -874,10 +874,18 @@ MTX.prototype.selectCoins = function selectCoins(coins, options) {
   outputValue = tx.getOutputValue();
   tryFree = options.free;
 
+  if (options.confirmed) {
+    coins = coins.filter(function(coin) {
+      return coin.height !== -1;
+    });
+  }
+
   if (!options.selection || options.selection === 'age') {
     // Oldest unspents first
     coins = coins.slice().sort(function(a, b) {
-      return a.height - b.height;
+      a = a.height === -1 ? 0x7fffffff : a.height;
+      b = b.height === -1 ? 0x7fffffff : b.height;
+      return a - b;
     });
   } else if (options.selection === 'random' || options.selection === 'all') {
     // Random unspents
diff --git a/lib/bcoin/peer.js b/lib/bcoin/peer.js
index 9c927f30..cd274420 100644
--- a/lib/bcoin/peer.js
+++ b/lib/bcoin/peer.js
@@ -957,7 +957,7 @@ Peer.prototype._handleGetData = function handleGetData(items) {
           return next();
         }
 
-        block = bcoin.merkleblock.fromBlock(block, self.filter);
+        block = block.toMerkle(self.filter);
 
         self._write(self.framer.merkleBlock(block));
 
diff --git a/lib/bcoin/pool.js b/lib/bcoin/pool.js
index e45885af..959c904e 100644
--- a/lib/bcoin/pool.js
+++ b/lib/bcoin/pool.js
@@ -31,17 +31,12 @@ function Pool(node, options) {
   this.options = options;
   this.network = node.network;
 
-  options.spv = options.spv !== false;
-
-  if (options.type === 'spv')
-    options.spv = true;
-  else if (options.type === 'full')
-    options.spv = false;
-
-  options.headers = options.headers;
-  options.relay = options.relay == null
-    ? (!options.spv ? true : false)
-    : options.relay;
+  if (options.relay == null) {
+    if (options.spv)
+      options.relay = false;
+    else
+      options.relay = true;
+  }
 
   seeds = (options.seeds || network.seeds).slice();
 
diff --git a/lib/bcoin/wallet.js b/lib/bcoin/wallet.js
index 6cf17d59..7a1b1f08 100644
--- a/lib/bcoin/wallet.js
+++ b/lib/bcoin/wallet.js
@@ -16,6 +16,8 @@ var network = bcoin.protocol.network;
  */
 
 function Wallet(options) {
+  var i;
+
   if (!(this instanceof Wallet))
     return new Wallet(options);
 
@@ -87,9 +89,10 @@ function Wallet(options) {
 
   this.addKey(this.accountKey);
 
-  (options.keys || []).forEach(function(key) {
-    this.addKey(key);
-  }, this);
+  if (options.keys) {
+    for (i = 0; i < options.keys.length; i++)
+      this.addKey(options.keys[i]);
+  }
 }
 
 utils.inherits(Wallet, EventEmitter);
@@ -184,7 +187,7 @@ Wallet.prototype.destroy = function destroy(callback) {
 };
 
 Wallet.prototype.addKey = function addKey(key) {
-  var has;
+  var index, i;
 
   if (key instanceof bcoin.wallet) {
     assert(key.derivation === this.derivation);
@@ -207,11 +210,14 @@ Wallet.prototype.addKey = function addKey(key) {
       throw new Error('Must add HD purpose keys to BIP45 wallet.');
   }
 
-  has = this.keys.some(function(k) {
-    return k.xpubkey === key.xpubkey;
-  });
+  for (i = 0; i < this.keys.length; i++) {
+    if (this.keys[i].xpubkey === key.xpubkey) {
+      index = i;
+      break;
+    }
+  }
 
-  if (has)
+  if (index != null)
     return;
 
   assert(!this._keysFinalized);
@@ -223,7 +229,7 @@ Wallet.prototype.addKey = function addKey(key) {
 };
 
 Wallet.prototype.removeKey = function removeKey(key) {
-  var index;
+  var index, i;
 
   assert(!this._keysFinalized);
 
@@ -248,11 +254,12 @@ Wallet.prototype.removeKey = function removeKey(key) {
       throw new Error('Must add HD purpose keys to BIP45 wallet.');
   }
 
-  index = this.keys.map(function(k, i) {
-    return k.xpubkey === key.xpubkey ? i : null;
-  }).filter(function(i) {
-    return i !== null;
-  })[0];
+  for (i = 0; i < this.keys.length; i++) {
+    if (this.keys[i].xpubkey === key.xpubkey) {
+      index = i;
+      break;
+    }
+  }
 
   if (index == null)
     return;
@@ -523,6 +530,8 @@ Wallet.prototype.fill = function fill(tx, options, callback) {
     try {
       tx.fill(coins, {
         selection: options.selection || 'age',
+        confirmed: options.confirmed,
+        free: options.free,
         fee: options.fee,
         subtractFee: options.subtractFee,
         changeAddress: self.changeAddress.getAddress(),