diff --git a/lib/blockchain/chaindb.js b/lib/blockchain/chaindb.js
index a387440d..ab06683f 100644
--- a/lib/blockchain/chaindb.js
+++ b/lib/blockchain/chaindb.js
@@ -1120,9 +1120,6 @@ ChainDB.prototype.getCoinsByAddress = co(function* getCoinsByAddress(addresses)
     address = addresses[i];
     hash = Address.getHash(address);
 
-    if (!hash)
-      throw new Error('Not an address.');
-
     keys = yield this.db.keys({
       gte: layout.C(hash, encoding.ZERO_HASH, 0),
       lte: layout.C(hash, encoding.MAX_HASH, 0xffffffff),
diff --git a/lib/mempool/mempool.js b/lib/mempool/mempool.js
index d7b5b0c2..456957e6 100644
--- a/lib/mempool/mempool.js
+++ b/lib/mempool/mempool.js
@@ -552,10 +552,6 @@ Mempool.prototype.getCoinsByAddress = function getCoinsByAddress(addresses) {
 
   for (i = 0; i < addresses.length; i++) {
     hash = Address.getHash(addresses[i], 'hex');
-
-    if (!hash)
-      throw new Error('Not an address.');
-
     coin = this.coinIndex.get(hash);
 
     for (j = 0; j < coin.length; j++)
@@ -580,10 +576,6 @@ Mempool.prototype.getTXByAddress = function getTXByAddress(addresses) {
 
   for (i = 0; i < addresses.length; i++) {
     hash = Address.getHash(addresses[i], 'hex');
-
-    if (!hash)
-      throw new Error('Not an address.');
-
     tx = this.txIndex.get(hash);
 
     for (j = 0; j < tx.length; j++)
@@ -608,10 +600,6 @@ Mempool.prototype.getMetaByAddress = function getMetaByAddress(addresses) {
 
   for (i = 0; i < addresses.length; i++) {
     hash = Address.getHash(addresses[i], 'hex');
-
-    if (!hash)
-      throw new Error('Not an address.');
-
     tx = this.txIndex.getMeta(hash);
 
     for (j = 0; j < tx.length; j++)
diff --git a/lib/net/pool.js b/lib/net/pool.js
index 83a8a314..9621f717 100644
--- a/lib/net/pool.js
+++ b/lib/net/pool.js
@@ -3375,7 +3375,6 @@ Pool.prototype.sendFilterLoad = function sendFilterLoad() {
 
 Pool.prototype.watchAddress = function watchAddress(address) {
   var hash = Address.getHash(address);
-  assert(hash, 'Bad address.');
   this.watch(hash);
 };
 
diff --git a/lib/primitives/address.js b/lib/primitives/address.js
index 68277ba5..ca922c67 100644
--- a/lib/primitives/address.js
+++ b/lib/primitives/address.js
@@ -816,29 +816,36 @@ Address.prototype.isUnknown = function isUnknown() {
 
 /**
  * Get the hash of a base58 address or address-related object.
- * @param {Base58Address|Address|Hash} data
- * @param {String} enc
- * @returns {Hash|null}
+ * @param {String|Address|Hash} data
+ * @param {String?} enc
+ * @param {Network?} network
+ * @returns {Hash}
  */
 
-Address.getHash = function getHash(data, enc) {
+Address.getHash = function getHash(data, enc, network) {
   var hash;
 
+  if (!data)
+    throw new Error('Object is not an address.');
+
   if (typeof data === 'string') {
     if (data.length === 40 || data.length === 64)
       return enc === 'hex' ? data : new Buffer(data, 'hex');
 
-    try {
-      hash = Address.fromString(data).hash;
-    } catch (e) {
-      return;
-    }
+    hash = Address.fromString(data, network).hash;
   } else if (Buffer.isBuffer(data)) {
+    if (data.length !== 20 && data.length !== 32)
+      throw new Error('Object is not an address.');
     hash = data;
   } else if (data instanceof Address) {
     hash = data.hash;
+    if (network) {
+      network = Network.get(network);
+      if (data.network !== network)
+        throw new Error('Network mismatch for address.');
+    }
   } else {
-    return;
+    throw new Error('Object is not an address.');
   }
 
   return enc === 'hex'
diff --git a/lib/wallet/txdb.js b/lib/wallet/txdb.js
index 6b66f735..e762791a 100644
--- a/lib/wallet/txdb.js
+++ b/lib/wallet/txdb.js
@@ -266,9 +266,12 @@ TXDB.prototype.values = function values(options) {
  */
 
 TXDB.prototype.getPath = function getPath(output) {
-  if (!output)
+  var addr = output.getAddress();
+
+  if (!addr)
     return Promise.resolve();
-  return this.wallet.getPath(output.getAddress());
+
+  return this.wallet.getPath(addr);
 };
 
 /**
@@ -278,9 +281,12 @@ TXDB.prototype.getPath = function getPath(output) {
  */
 
 TXDB.prototype.hasPath = function hasPath(output) {
-  if (!output)
-    return Promise.resolve();
-  return this.wallet.hasPath(output.getAddress());
+  var addr = output.getAddress();
+
+  if (!addr)
+    return Promise.resolve(false);
+
+  return this.wallet.hasPath(addr);
 };
 
 /**
@@ -2342,7 +2348,11 @@ TXDB.prototype._toDetails = co(function* _toDetails(wtx) {
 
   for (i = 0; i < tx.inputs.length; i++) {
     coin = coins[i];
-    path = yield this.getPath(coin);
+    path = null;
+
+    if (coin)
+      path = yield this.getPath(coin);
+
     details.setInput(i, path, coin);
   }
 
diff --git a/lib/wallet/wallet.js b/lib/wallet/wallet.js
index 010982a8..80e4cb33 100644
--- a/lib/wallet/wallet.js
+++ b/lib/wallet/wallet.js
@@ -1060,13 +1060,7 @@ Wallet.prototype.commit = function commit() {
 
 Wallet.prototype.hasAddress = co(function* hasAddress(address) {
   var hash = Address.getHash(address, 'hex');
-  var path;
-
-  if (!hash)
-    return false;
-
-  path = yield this.getPath(hash);
-
+  var path = yield this.getPath(hash);
   return path != null;
 });
 
@@ -1100,12 +1094,7 @@ Wallet.prototype.getPath = co(function* getPath(address) {
 
 Wallet.prototype.readPath = co(function* readPath(address) {
   var hash = Address.getHash(address, 'hex');
-  var path;
-
-  if (!hash)
-    return;
-
-  path = this.pathCache.get(hash);
+  var path = this.pathCache.get(hash);
 
   if (path)
     return path;
@@ -1129,9 +1118,6 @@ Wallet.prototype.readPath = co(function* readPath(address) {
 Wallet.prototype.hasPath = co(function* hasPath(address) {
   var hash = Address.getHash(address, 'hex');
 
-  if (!hash)
-    return false;
-
   if (this.pathCache.has(hash))
     return true;
 
@@ -1456,12 +1442,7 @@ Wallet.prototype._fund = co(function* fund(mtx, options) {
 
 Wallet.prototype.getAccountByAddress = co(function* getAccountByAddress(address) {
   var hash = Address.getHash(address, 'hex');
-  var path;
-
-  if (!hash)
-    return;
-
-  path = yield this.getPath(hash);
+  var path = yield this.getPath(hash);
 
   if (!path)
     return;
@@ -1478,8 +1459,13 @@ Wallet.prototype.getAccountByAddress = co(function* getAccountByAddress(address)
 Wallet.prototype.estimateSize = co(function* estimateSize(prev) {
   var scale = consensus.WITNESS_SCALE_FACTOR;
   var address = prev.getAddress();
-  var account = yield this.getAccountByAddress(address);
   var size = 0;
+  var account;
+
+  if (!address)
+    return -1;
+
+  account = yield this.getAccountByAddress(address);
 
   if (!account)
     return -1;
@@ -1666,7 +1652,7 @@ Wallet.prototype._send = co(function* send(options, passphrase) {
 
 Wallet.prototype.increaseFee = co(function* increaseFee(hash, rate, passphrase) {
   var wtx = yield this.getTX(hash);
-  var i, tx, mtx, view, oldFee, fee, path, input, output, change;
+  var i, tx, mtx, view, oldFee, fee, path, input, output, change, addr;
 
   assert(util.isUInt32(rate), 'Rate must be a number.');
 
@@ -1708,7 +1694,12 @@ Wallet.prototype.increaseFee = co(function* increaseFee(hash, rate, passphrase)
 
   for (i = 0; i < mtx.outputs.length; i++) {
     output = mtx.outputs[i];
-    path = yield this.getPath(output.getAddress());
+    addr = output.getAddress();
+
+    if (!addr)
+      continue;
+
+    path = yield this.getPath(addr);
 
     if (!path)
       continue;
@@ -1820,12 +1811,8 @@ Wallet.prototype.deriveInputs = co(function* deriveInputs(mtx) {
 
 Wallet.prototype.getKey = co(function* getKey(address) {
   var hash = Address.getHash(address, 'hex');
-  var path, account;
-
-  if (!hash)
-    return;
-
-  path = yield this.getPath(hash);
+  var path = yield this.getPath(hash);
+  var account;
 
   if (!path)
     return;
@@ -1848,12 +1835,8 @@ Wallet.prototype.getKey = co(function* getKey(address) {
 
 Wallet.prototype.getPrivateKey = co(function* getPrivateKey(address, passphrase) {
   var hash = Address.getHash(address, 'hex');
-  var path, account, key;
-
-  if (!hash)
-    return;
-
-  path = yield this.getPath(hash);
+  var path = yield this.getPath(hash);
+  var account, key;
 
   if (!path)
     return;