diff --git a/lib/bcoin/chain.js b/lib/bcoin/chain.js
index 49be7463..c46bef08 100644
--- a/lib/bcoin/chain.js
+++ b/lib/bcoin/chain.js
@@ -1236,7 +1236,7 @@ Chain.prototype.setBestChain = function setBestChain(entry, block, prev, callbac
 
   // A higher fork has arrived.
   // Time to reorganize the chain.
-  self.logger.warning('WARNING: Reorganizing chain.');
+  this.logger.warning('WARNING: Reorganizing chain.');
   return this.reorganize(entry, block, done);
 };
 
diff --git a/lib/bcoin/chaindb.js b/lib/bcoin/chaindb.js
index 804b43de..caeea2fb 100644
--- a/lib/bcoin/chaindb.js
+++ b/lib/bcoin/chaindb.js
@@ -848,7 +848,7 @@ ChainDB.prototype.connectBlock = function connectBlock(block, view, batch, callb
 
   for (i = 0; i < block.txs.length; i++) {
     tx = block.txs[i];
-    hash = tx.hash('hex');
+    hash = tx.hash();
 
     if (this.options.indexTX) {
       batch.put(layout.t(hash), tx.toExtended());
diff --git a/lib/bcoin/coins.js b/lib/bcoin/coins.js
index aa34e685..9cc18cbb 100644
--- a/lib/bcoin/coins.js
+++ b/lib/bcoin/coins.js
@@ -48,20 +48,30 @@ function Coins(options) {
  */
 
 Coins.prototype.fromOptions = function fromOptions(options) {
-  if (options.version != null)
+  if (options.version != null) {
+    assert(utils.isNumber(options.version));
     this.version = options.version;
+  }
 
-  if (options.hash)
+  if (options.hash) {
+    assert(typeof options.hash === 'string');
     this.hash = options.hash;
+  }
 
-  if (options.height != null)
+  if (options.height != null) {
+    assert(utils.isNumber(options.height));
     this.height = options.height;
+  }
 
-  if (options.coinbase != null)
+  if (options.coinbase != null) {
+    assert(typeof options.coinbase === 'boolean');
     this.coinbase = options.coinbase;
+  }
 
-  if (options.outputs)
+  if (options.outputs) {
+    assert(Array.isArray(options.outputs));
     this.outputs = options.outputs;
+  }
 
   return this;
 };
diff --git a/lib/bcoin/input.js b/lib/bcoin/input.js
index 0342d532..6ce89de1 100644
--- a/lib/bcoin/input.js
+++ b/lib/bcoin/input.js
@@ -51,8 +51,6 @@ Outpoint.prototype.fromOptions = function fromOptions(options) {
  */
 
 Outpoint.fromOptions = function fromOptions(options) {
-  if (options instanceof Outpoint)
-    return options;
   return new Outpoint().fromOptions(options);
 };
 
@@ -63,7 +61,7 @@ Outpoint.fromOptions = function fromOptions(options) {
  */
 
 Outpoint.prototype.isNull = function isNull() {
-  return this.hash === constants.NULL_HASH && this.index === 0xffffffff;
+  return this.index === 0xffffffff && this.hash === constants.NULL_HASH;
 };
 
 /**
@@ -176,7 +174,7 @@ Outpoint.fromTX = function fromTX(tx, index) {
  */
 
 Outpoint.prototype.inspect = function inspect() {
-  return '<Outpoint: ' + this.hash + '/' + this.index + '>';
+  return '<Outpoint: ' + utils.revHex(this.hash) + '/' + this.index + '>';
 };
 
 /**