diff --git a/lib/bcoin/db/level.js b/lib/bcoin/db/level.js
index 089283cf..9c6a691f 100644
--- a/lib/bcoin/db/level.js
+++ b/lib/bcoin/db/level.js
@@ -54,7 +54,7 @@ DB.prototype.iterator = function iterator(options) {
 };
 
 DB.destroy = function destroy(db, callback) {
-  level.destroy(db, callback);
+  Level.destroy(db, callback);
 };
 
 function Batch(db) {
diff --git a/lib/bcoin/primitives/keyring.js b/lib/bcoin/primitives/keyring.js
index b56cdc1e..daad4cd8 100644
--- a/lib/bcoin/primitives/keyring.js
+++ b/lib/bcoin/primitives/keyring.js
@@ -883,7 +883,7 @@ function toKey(opt) {
     return opt;
 
   if (opt.privateKey)
-    return opt.privateKey
+    return opt.privateKey;
 
   if (opt.publicKey)
     return opt.publicKey;
diff --git a/lib/bcoin/script/opcode.js b/lib/bcoin/script/opcode.js
index b060f2f3..da147731 100644
--- a/lib/bcoin/script/opcode.js
+++ b/lib/bcoin/script/opcode.js
@@ -1,5 +1,5 @@
 /*!
- * script.js - script interpreter for bcoin
+ * opcode.js - opcode object for bcoin
  * Copyright (c) 2014-2015, Fedor Indutny (MIT License)
  * Copyright (c) 2014-2016, Christopher Jeffrey (MIT License).
  * https://github.com/bcoin-org/bcoin
diff --git a/lib/bcoin/script/program.js b/lib/bcoin/script/program.js
index 733b5229..1d3ee8ee 100644
--- a/lib/bcoin/script/program.js
+++ b/lib/bcoin/script/program.js
@@ -1,5 +1,5 @@
 /*!
- * script.js - script interpreter for bcoin
+ * program.js - program object for bcoin
  * Copyright (c) 2014-2015, Fedor Indutny (MIT License)
  * Copyright (c) 2014-2016, Christopher Jeffrey (MIT License).
  * https://github.com/bcoin-org/bcoin
@@ -11,7 +11,6 @@ var bcoin = require('../env');
 var constants = bcoin.constants;
 var utils = require('../utils/utils');
 var assert = utils.assert;
-var opcodes = constants.opcodes;
 var scriptTypes = constants.scriptTypes;
 
 /**
diff --git a/lib/bcoin/script/stack.js b/lib/bcoin/script/stack.js
index f8aa648c..9b07ab19 100644
--- a/lib/bcoin/script/stack.js
+++ b/lib/bcoin/script/stack.js
@@ -1,5 +1,5 @@
 /*!
- * script.js - script interpreter for bcoin
+ * stack.js - stack object for bcoin
  * Copyright (c) 2014-2015, Fedor Indutny (MIT License)
  * Copyright (c) 2014-2016, Christopher Jeffrey (MIT License).
  * https://github.com/bcoin-org/bcoin
diff --git a/lib/bcoin/script/witness.js b/lib/bcoin/script/witness.js
index 69716e4c..5f3f6722 100644
--- a/lib/bcoin/script/witness.js
+++ b/lib/bcoin/script/witness.js
@@ -1,5 +1,5 @@
 /*!
- * script.js - script interpreter for bcoin
+ * witness.js - witness object for bcoin
  * Copyright (c) 2014-2015, Fedor Indutny (MIT License)
  * Copyright (c) 2014-2016, Christopher Jeffrey (MIT License).
  * https://github.com/bcoin-org/bcoin
diff --git a/lib/bcoin/wallet/walletdb.js b/lib/bcoin/wallet/walletdb.js
index 6c34b824..7faa4d0a 100644
--- a/lib/bcoin/wallet/walletdb.js
+++ b/lib/bcoin/wallet/walletdb.js
@@ -14,7 +14,6 @@ var assert = utils.assert;
 var constants = bcoin.constants;
 var BufferReader = require('../utils/reader');
 var BufferWriter = require('../utils/writer');
-var TXDB = require('./txdb');
 var Path = require('./path');
 var MAX_POINT = String.fromCharCode(0xdbff, 0xdfff); // U+10FFFF