diff --git a/lib/bcoin/chaindb.js b/lib/bcoin/chaindb.js
index 579c3726..2e8222ba 100644
--- a/lib/bcoin/chaindb.js
+++ b/lib/bcoin/chaindb.js
@@ -849,8 +849,8 @@ ChainDB.prototype.getCoinsByAddress = function getCoinsByAddress(addresses, opti
 
   utils.forEach(addresses, function(address, done) {
     var iter = self.db.db.iterator({
-      gte: 'u/a/' + address,
-      lte: 'u/a/' + address + '~',
+      gte: 'u/a/' + address + '/',
+      lte: 'u/a/' + address + '/~',
       keys: true,
       values: true,
       fillCache: true,
@@ -945,8 +945,8 @@ ChainDB.prototype.getTXByAddress = function getTXByAddress(addresses, options, c
 
   utils.forEach(addresses, function(address, done) {
     var iter = self.db.db.iterator({
-      gte: 't/a/' + address,
-      lte: 't/a/' + address + '~',
+      gte: 't/a/' + address + '/',
+      lte: 't/a/' + address + '/~',
       keys: true,
       values: true,
       fillCache: true,
@@ -977,6 +977,8 @@ ChainDB.prototype.getTXByAddress = function getTXByAddress(addresses, options, c
         }
 
         hashes.push(hash);
+
+        next();
       });
     })();
   }, function(err) {
diff --git a/lib/bcoin/datastore.js b/lib/bcoin/datastore.js
index ab72c762..2a3fc206 100644
--- a/lib/bcoin/datastore.js
+++ b/lib/bcoin/datastore.js
@@ -330,8 +330,11 @@ DataStore.prototype.iterator = function iterator(options) {
 function Iterator(store, options) {
   this.store = store;
   this._db = store._db;
-  if (options && options.keys === false)
+  if (!options)
+    options = {};
+  if (options.keys === false)
     options.keys = true;
+  this.options = options;
   this.iterator = this._db.db.iterator(options);
 }
 
@@ -343,18 +346,19 @@ Iterator.prototype.seek = function seek(key) {
 // hashes directly in the db (unless they're
 // the same length as offset).
 function isDirect(key) {
-  return !/^(b\/b\/|t\/t\/)/.test(key);
+  return !/^(b\/b\/|t\/t\/|c\/c\/|u\/t\/)/.test(key);
 }
 
 Iterator.prototype.next = function next(callback) {
+  var self = this;
   return this.iterator.next(function(err, key, value) {
     if (err)
       return callback(err);
 
-    if (value) {
+    if (self.options.values !== false && value) {
       if (isDirect(key))
         return callback(null, key, value);
-      return self.getData(value, function(err, data) {
+      return self.store.getData(value, function(err, data) {
         if (err)
           return callback(err);
         return callback(null, key, data);
@@ -634,9 +638,8 @@ DataStore.prototype.write = function write(fd, offset, data, callback) {
 
   (function next() {
     fs.write(fd, data, index, size, offset, function(err, bytes) {
-      if (err) {
-        return callback(err, index);
-      }
+      if (err)
+        return callback(err);
 
       if (!bytes)
         return callback(self._ioError('write', size, offset));
diff --git a/lib/bcoin/utils.js b/lib/bcoin/utils.js
index fde36c50..d2c48f56 100644
--- a/lib/bcoin/utils.js
+++ b/lib/bcoin/utils.js
@@ -1728,7 +1728,7 @@ utils.indexOf = function indexOf(arr, buf) {
 };
 
 utils.pad32 = function pad32(num) {
-  assert(num >= 0);
+  assert(num >= 0, num);
   num = num + '';
   while (num.length < 10)
     num = '0' + num;