diff --git a/lib/hd/private.js b/lib/hd/private.js
index f184e073..f66c783d 100644
--- a/lib/hd/private.js
+++ b/lib/hd/private.js
@@ -162,6 +162,18 @@ HDPrivateKey.prototype.xpubkey = function xpubkey() {
   return this.toPublic().xpubkey();
 };
 
+/**
+ * Verify network.
+ * @param {(NetworkType|Network)} network
+ * @returns {Boolean}
+ */
+
+HDPrivateKey.prototype.verifyNetwork = function verifyNetwork(network) {
+  network = Network.get(network);
+  return this.network.keyPrefix.xprivkey === network.keyPrefix.xprivkey
+    && this.network.keyPrefix.coinType === network.keyPrefix.coinType;
+};
+
 /**
  * Destroy the key (zeroes chain code, privkey, and pubkey).
  * @param {Boolean} pub - Destroy hd public key as well.
diff --git a/lib/hd/public.js b/lib/hd/public.js
index 2c9fe5ca..e276f4aa 100644
--- a/lib/hd/public.js
+++ b/lib/hd/public.js
@@ -132,6 +132,18 @@ HDPublicKey.prototype.xpubkey = function() {
   return this._xpubkey;
 };
 
+/**
+ * Verify network.
+ * @param {(NetworkType|Network)} network
+ * @returns {Boolean}
+ */
+
+HDPublicKey.prototype.verifyNetwork = function verifyNetwork(network) {
+  network = Network.get(network);
+  return this.network.keyPrefix.xpubkey === network.keyPrefix.xpubkey
+    && this.network.keyPrefix.coinType === network.keyPrefix.coinType;
+};
+
 /**
  * Destroy the key (zeroes chain code and pubkey).
  */
diff --git a/lib/http/client.js b/lib/http/client.js
index 230d761c..06dce9a1 100644
--- a/lib/http/client.js
+++ b/lib/http/client.js
@@ -702,17 +702,6 @@ HTTPClient.prototype.sign = function sign(id, tx, options) {
   return this._post('/wallet/' + id + '/sign', body);
 };
 
-/**
- * Fill a transaction with coins.
- * @param {TX} tx
- * @returns {Promise}
- */
-
-HTTPClient.prototype.fillCoins = function fillCoins(id, tx) {
-  var body = { tx: toHex(tx) };
-  return this._post('/wallet/' + id + '/fill', body);
-};
-
 /**
  * @param {WalletID} id
  * @param {Number} now - Current time.
diff --git a/lib/http/rpc.js b/lib/http/rpc.js
index 4c55633c..4e19767b 100644
--- a/lib/http/rpc.js
+++ b/lib/http/rpc.js
@@ -765,6 +765,12 @@ RPC.prototype.getblock = co(function* getblock(args) {
 
 RPC.prototype._txToJSON = function _txToJSON(tx, entry) {
   var self = this;
+  var height = entry ? entry.height : -1;
+  var conf = 0;
+
+  if (height >= this.chain.height)
+    conf = height + 1 - this.chain.height;
+
   return {
     txid: tx.txid(),
     hash: tx.wtxid(),
@@ -800,7 +806,7 @@ RPC.prototype._txToJSON = function _txToJSON(tx, entry) {
       };
     }),
     blockhash: entry ? entry.rhash() : null,
-    confirmations: tx.getConfirmations(this.chain.height),
+    confirmations: conf,
     time: entry ? entry.ts : 0,
     blocktime: entry ? entry.ts : 0
   };
@@ -1170,7 +1176,7 @@ RPC.prototype.gettxout = co(function* gettxout(args) {
 
   return {
     bestblock: this.chain.tip.rhash(),
-    confirmations: coin.getConfirmations(this.chain.height),
+    confirmations: coin.getDepth(this.chain.height),
     value: Amount.btc(coin.value, true),
     scriptPubKey: this._scriptToJSON(coin.script, true),
     version: coin.version,
@@ -2920,7 +2926,7 @@ RPC.prototype.getreceivedbyaccount = co(function* getreceivedbyaccount(args) {
   for (i = 0; i < txs.length; i++) {
     wtx = txs[i];
 
-    conf = wtx.getConfirmations(this.chain.height);
+    conf = wtx.getDepth(this.chain.height);
 
     if (conf < minconf)
       continue;
@@ -2961,7 +2967,7 @@ RPC.prototype.getreceivedbyaddress = co(function* getreceivedbyaddress(args) {
   for (i = 0; i < txs.length; i++) {
     wtx = txs[i];
 
-    if (wtx.getConfirmations(this.chain.height) < minconf)
+    if (wtx.getDepth(this.chain.height) < minconf)
       continue;
 
     for (j = 0; j < wtx.tx.outputs.length; j++) {
@@ -3389,7 +3395,7 @@ RPC.prototype._listReceived = co(function* _listReceived(minconf, empty, account
   for (i = 0; i < txs.length; i++) {
     wtx = txs[i];
 
-    conf = wtx.getConfirmations(this.chain.height);
+    conf = wtx.getDepth(this.chain.height);
 
     if (conf < minconf)
       continue;
@@ -3495,7 +3501,7 @@ RPC.prototype.listsinceblock = co(function* listsinceblock(args) {
     if (wtx.height < height)
       continue;
 
-    if (wtx.getConfirmations(this.chain.height) < minconf)
+    if (wtx.getDepth(this.chain.height) < minconf)
       continue;
 
     if (!highest || wtx.height > highest)
diff --git a/lib/http/wallet.js b/lib/http/wallet.js
index 88a89e8b..bdd43452 100644
--- a/lib/http/wallet.js
+++ b/lib/http/wallet.js
@@ -272,14 +272,6 @@ HTTPWallet.prototype.sign = function sign(tx, options) {
   return this.client.sign(this.id, tx, options);
 };
 
-/**
- * @see Wallet#fillCoins
- */
-
-HTTPWallet.prototype.fillCoins = function fillCoins(tx) {
-  return this.client.fillCoins(tx);
-};
-
 /**
  * @see HTTPClient#getWallet
  */
diff --git a/lib/primitives/coin.js b/lib/primitives/coin.js
index 9cf4688c..41a7031d 100644
--- a/lib/primitives/coin.js
+++ b/lib/primitives/coin.js
@@ -98,7 +98,7 @@ Coin.fromOptions = function fromOptions(options) {
  * @return {Number}
  */
 
-Coin.prototype.getConfirmations = function getConfirmations(height) {
+Coin.prototype.getDepth = function getDepth(height) {
   assert(typeof height === 'number', 'Must pass a height.');
 
   if (this.height === -1)
@@ -363,7 +363,7 @@ Coin.isCoin = function isCoin(obj) {
   return obj
     && obj.version !== undefined
     && obj.script !== undefined
-    && typeof obj.getConfirmations === 'function';
+    && typeof obj.getDepth === 'function';
 };
 
 /*
diff --git a/lib/primitives/keyring.js b/lib/primitives/keyring.js
index 7390847d..6ca26d1d 100644
--- a/lib/primitives/keyring.js
+++ b/lib/primitives/keyring.js
@@ -329,6 +329,17 @@ KeyRing.fromSecret = function fromSecret(data) {
   return new KeyRing().fromSecret(data);
 };
 
+/**
+ * Verify network.
+ * @param {(NetworkType|Network)} network
+ * @returns {Boolean}
+ */
+
+KeyRing.prototype.verifyNetwork = function verifyNetwork(network) {
+  network = Network.get(network);
+  return this.network.keyPrefix.privkey === network.keyPrefix.privkey;
+};
+
 /**
  * Get private key.
  * @param {String?} enc - Can be `"hex"`, `"base58"`, or `null`.
diff --git a/lib/primitives/mtx.js b/lib/primitives/mtx.js
index 799e7781..46753421 100644
--- a/lib/primitives/mtx.js
+++ b/lib/primitives/mtx.js
@@ -154,10 +154,11 @@ MTX.prototype.addInput = function addInput(coin, index) {
 
   if (coin instanceof Outpoint) {
     input.prevout.fromOptions(coin);
-  } else {
-    input.fromOptions(coin);
+    this.inputs.push(input);
+    return this;
   }
 
+  input.fromOptions(coin);
   this.inputs.push(input);
 
   return this;
@@ -306,8 +307,8 @@ MTX.prototype.getSigops = function getSigops(flags) {
  * @returns {Boolean}
  */
 
-MTX.prototype.checkInputs = function checkInputs(spendHeight, ret) {
-  return TX.prototype.checkInputs.call(this, this.view, spendHeight, ret);
+MTX.prototype.checkInputs = function checkInputs(height, ret) {
+  return TX.prototype.checkInputs.call(this, this.view, height, ret);
 };
 
 /**
@@ -1294,10 +1295,14 @@ MTX.prototype.setSequence = function setSequence(index, locktime, seconds) {
  * @private
  */
 
-MTX.prototype._mutable = function _mutable() {
-  var i;
-  for (i = 0; i < this.outputs.length; i++)
-    this.outputs[i].mutable = true;
+MTX.prototype._mutable = function _mutable(value) {
+  var i, output;
+
+  for (i = 0; i < this.outputs.length; i++) {
+    output = this.outputs[i];
+    output.mutable = value;
+  }
+
   return this;
 };
 
@@ -1343,7 +1348,7 @@ MTX.prototype.getJSON = function getJSON(network) {
  */
 
 MTX.fromJSON = function fromJSON(json) {
-  return new MTX().fromJSON(JSON)._mutable();
+  return new MTX().fromJSON(JSON)._mutable(true);
 };
 
 /**
@@ -1351,7 +1356,7 @@ MTX.fromJSON = function fromJSON(json) {
  */
 
 MTX.fromReader = function fromReader(br) {
-  return new MTX().fromReader(br)._mutable();
+  return new MTX().fromReader(br)._mutable(true);
 };
 
 /**
@@ -1361,23 +1366,7 @@ MTX.fromReader = function fromReader(br) {
 MTX.fromRaw = function fromRaw(data, enc) {
   if (typeof data === 'string')
     data = new Buffer(data, enc);
-  return new MTX().fromRaw(data)._mutable();
-};
-
-/**
- * @see TX.fromExtended
- */
-
-MTX.fromExtended = function fromExtended(data, saveCoins, enc) {
-  if (typeof saveCoins === 'string') {
-    enc = saveCoins;
-    saveCoins = false;
-  }
-
-  if (typeof data === 'string')
-    data = new Buffer(data, enc);
-
-  return new MTX().fromExtended(data, saveCoins)._mutable();
+  return new MTX().fromRaw(data)._mutable(true);
 };
 
 /**
diff --git a/lib/primitives/tx.js b/lib/primitives/tx.js
index 9f6fa809..1a4832c1 100644
--- a/lib/primitives/tx.js
+++ b/lib/primitives/tx.js
@@ -1242,6 +1242,9 @@ TX.prototype.isSane = function isSane(ret) {
     }
   }
 
+  if (!this.mutable)
+    this._outputValue = total;
+
   return true;
 };
 
@@ -1381,13 +1384,11 @@ TX.prototype.hasStandardInputs = function hasStandardInputs(view) {
  */
 
 TX.prototype.hasStandardWitness = function hasStandardWitness(view, ret) {
-  var result;
+  var result = this.getWitnessStandard(view);
 
   if (!ret)
     ret = new VerifyResult();
 
-  result = this.getWitnessStandard(view);
-
   switch (result) {
     case BAD_WITNESS:
       ret.reason = 'bad-witness';
@@ -1543,7 +1544,7 @@ TX.prototype.getWitnessStandard = function getWitnessStandard(view) {
  * after they're created). Note that this function is
  * consensus critical.
  * @param {CoinView} view
- * @param {Number} spendHeight - Height at which the
+ * @param {Number} height - Height at which the
  * transaction is being spent. In the mempool this is
  * the chain height plus one at the time it entered the pool.
  * @param {Object?} ret - Return object, may be
@@ -1551,13 +1552,15 @@ TX.prototype.getWitnessStandard = function getWitnessStandard(view) {
  * @returns {Boolean}
  */
 
-TX.prototype.checkInputs = function checkInputs(view, spendHeight, ret) {
+TX.prototype.checkInputs = function checkInputs(view, height, ret) {
   var total = 0;
   var i, input, coins, coin, fee, value;
 
   if (!ret)
     ret = new VerifyResult();
 
+  assert(typeof height === 'number');
+
   for (i = 0; i < this.inputs.length; i++) {
     input = this.inputs[i];
     coins = view.get(input.prevout.hash);
@@ -1569,8 +1572,8 @@ TX.prototype.checkInputs = function checkInputs(view, spendHeight, ret) {
       return false;
     }
 
-    if (coins.coinbase && spendHeight != null) {
-      if (spendHeight - coins.height < constants.tx.COINBASE_MATURITY) {
+    if (coins.coinbase) {
+      if (height - coins.height < constants.tx.COINBASE_MATURITY) {
         ret.reason = 'bad-txns-premature-spend-of-coinbase';
         ret.score = 0;
         return false;
@@ -1617,6 +1620,9 @@ TX.prototype.checkInputs = function checkInputs(view, spendHeight, ret) {
     return false;
   }
 
+  if (!this.mutable)
+    this._inputValue = total;
+
   return true;
 };
 
diff --git a/lib/wallet/account.js b/lib/wallet/account.js
index 8bc49e4a..a9d4dbc7 100644
--- a/lib/wallet/account.js
+++ b/lib/wallet/account.js
@@ -281,7 +281,7 @@ Account.prototype.pushKey = function pushKey(key) {
   if (HD.isBase58(key))
     key = HD.fromBase58(key);
 
-  assert(key.network === this.network,
+  assert(key.verifyNetwork(this.network),
     'Network mismatch for account key.');
 
   if (!HD.isPublic(key))
@@ -321,7 +321,7 @@ Account.prototype.spliceKey = function spliceKey(key) {
   if (HD.isBase58(key))
     key = HD.fromBase58(key);
 
-  assert(key.network === this.network,
+  assert(key.verifyNetwork(this.network),
     'Network mismatch for account key.');
 
   if (!HD.isHDPublicKey(key))
diff --git a/lib/wallet/records.js b/lib/wallet/records.js
index 06285270..ca18753e 100644
--- a/lib/wallet/records.js
+++ b/lib/wallet/records.js
@@ -531,7 +531,7 @@ TXRecord.prototype.getBlock = function getBlock() {
  * @returns {Number} confirmations
  */
 
-TXRecord.prototype.getConfirmations = function getConfirmations(height) {
+TXRecord.prototype.getDepth = function getDepth(height) {
   assert(typeof height === 'number', 'Must pass in height.');
 
   if (this.height === -1)
diff --git a/lib/wallet/txdb.js b/lib/wallet/txdb.js
index 069b161e..e1f554af 100644
--- a/lib/wallet/txdb.js
+++ b/lib/wallet/txdb.js
@@ -3154,7 +3154,7 @@ Details.prototype.setOutput = function setOutput(i, path) {
  * @returns {Number}
  */
 
-Details.prototype.getConfirmations = function getConfirmations() {
+Details.prototype.getDepth = function getDepth() {
   var depth;
 
   if (this.height === -1)
@@ -3235,7 +3235,7 @@ Details.prototype.toJSON = function toJSON() {
     virtualSize: this.vsize,
     fee: Amount.btc(fee),
     rate: Amount.btc(rate),
-    confirmations: this.getConfirmations(),
+    confirmations: this.getDepth(),
     inputs: this.inputs.map(function(input) {
       return input.getJSON(self.network);
     }),
diff --git a/lib/wallet/wallet.js b/lib/wallet/wallet.js
index 7487d493..5e7937a1 100644
--- a/lib/wallet/wallet.js
+++ b/lib/wallet/wallet.js
@@ -116,7 +116,7 @@ Wallet.prototype.fromOptions = function fromOptions(options) {
     assert(HD.isPrivate(key),
       'Must create wallet with hd private key.');
 
-    assert(key.network === this.network,
+    assert(key.verifyNetwork(this.network),
       'Network mismatch for master key.');
 
     this.master.fromKey(key);
@@ -702,7 +702,7 @@ Wallet.prototype._createAccount = co(function* createAccount(options, passphrase
     if (!HD.isPublic(key))
       throw new Error('Must add HD public keys to watch only wallet.');
 
-    assert(key.network === this.network,
+    assert(key.verifyNetwork(this.network),
       'Network mismatch for watch only key.');
   } else {
     assert(this.master.key);
@@ -1240,7 +1240,7 @@ Wallet.prototype._importKey = co(function* importKey(acct, ring, passphrase) {
   if (acct == null)
     acct = 0;
 
-  assert(ring.network === this.network,
+  assert(ring.verifyNetwork(this.network),
     'Network mismatch for key.');
 
   if (!this.watchOnly) {
@@ -1325,7 +1325,7 @@ Wallet.prototype._importAddress = co(function* importAddress(acct, address) {
   if (acct == null)
     acct = 0;
 
-  assert(address.network === this.network,
+  assert(address.verifyNetwork(this.network),
     'Network mismatch for address.');
 
   if (!this.watchOnly)
diff --git a/test/wallet-test.js b/test/wallet-test.js
index c3993e89..02283b5b 100644
--- a/test/wallet-test.js
+++ b/test/wallet-test.js
@@ -1151,7 +1151,9 @@ describe('Wallet', function() {
     var w = wallet;
     var txs = yield w.getRange('foo', { start: util.now() - 1000 });
     var details = yield w.toDetails(txs);
-    assert.equal(details[1].toJSON().outputs[0].path.name, 'foo');
+    assert(details.some(function(tx) {
+      return tx.toJSON().outputs[0].path.name === 'foo';
+    }));
   }));
 
   it('should rename wallet', cob(function* () {