diff --git a/lib/mempool/mempool.js b/lib/mempool/mempool.js
index 674022a5..89f581e8 100644
--- a/lib/mempool/mempool.js
+++ b/lib/mempool/mempool.js
@@ -277,7 +277,7 @@ Mempool.prototype._removeBlock = co(function* removeBlock(block, txs) {
     tx = txs[i];
     hash = tx.hash('hex');
 
-    if (this.hasTX(hash))
+    if (this.hasEntry(hash))
       continue;
 
     try {
@@ -410,7 +410,7 @@ Mempool.prototype.limitSize = function limitSize(added) {
     entry = queue.shift();
     hash = entry.hash('hex');
 
-    if (!this.hasTX(hash))
+    if (!this.hasEntry(hash))
       continue;
 
     this.evictEntry(entry);
@@ -646,7 +646,7 @@ Mempool.prototype.getMeta = function getMeta(hash) {
  * @returns {Boolean}
  */
 
-Mempool.prototype.hasTX = function hasTX(hash) {
+Mempool.prototype.hasEntry = function hasEntry(hash) {
   return this.map[hash] != null;
 };
 
@@ -664,7 +664,7 @@ Mempool.prototype.has = function has(hash) {
   if (this.hasOrphan(hash))
     return true;
 
-  return this.hasTX(hash);
+  return this.hasEntry(hash);
 };
 
 /**
@@ -682,7 +682,7 @@ Mempool.prototype.exists = function exists(hash) {
   if (this.hasOrphan(hash))
     return true;
 
-  return this.hasTX(hash);
+  return this.hasEntry(hash);
 };
 
 /**
@@ -1381,7 +1381,7 @@ Mempool.prototype.getDepends = function getDepends(tx) {
 
   for (i = 0; i < prevout.length; i++) {
     hash = prevout[i];
-    if (this.hasTX(hash))
+    if (this.hasEntry(hash))
       depends.push(hash);
   }
 
diff --git a/lib/mining/miner.js b/lib/mining/miner.js
index 3f411fed..2d2ba162 100644
--- a/lib/mining/miner.js
+++ b/lib/mining/miner.js
@@ -412,7 +412,7 @@ Miner.prototype.build = function build(attempt) {
       input = tx.inputs[j];
       prev = input.prevout.hash;
 
-      if (!this.mempool.hasTX(prev))
+      if (!this.mempool.hasEntry(prev))
         continue;
 
       item.depCount += 1;
diff --git a/lib/node/fullnode.js b/lib/node/fullnode.js
index d85b8c6f..6f19b836 100644
--- a/lib/node/fullnode.js
+++ b/lib/node/fullnode.js
@@ -516,12 +516,12 @@ FullNode.prototype.getTX = co(function* getTX(hash) {
  * @returns {Promise} - Returns Boolean.
  */
 
-FullNode.prototype.hasTX = function hasTX(hash) {
-  if (this.mempool.hasTX(hash))
-    return Promise.resolve(true);
+FullNode.prototype.hasTX = co(function* hasTX(hash) {
+  if (this.mempool.hasEntry(hash))
+    return true;
 
-  return this.chain.db.hasTX(hash);
-};
+  return yield this.chain.db.hasTX(hash);
+});
 
 /*
  * Expose