From e3c54ea8189ce5bbd7e8aeff5c7b6018fa97b5b1 Mon Sep 17 00:00:00 2001
From: Danil Kovtonyuk <danx.kov@gmail.com>
Date: Thu, 17 Feb 2022 01:05:45 +1000
Subject: [PATCH] fix: bulk insert empty elements

---
 package.json      | 2 +-
 src/merkleTree.js | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/package.json b/package.json
index d0bc6b3..1183adc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fixed-merkle-tree",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "description": "Fixed depth merkle tree implementation with sequential inserts",
   "repository": "https://github.com/tornadocash/fixed-merkle-tree.git",
   "main": "src/merkleTree.js",
diff --git a/src/merkleTree.js b/src/merkleTree.js
index 3e6bb3b..ee93697 100644
--- a/src/merkleTree.js
+++ b/src/merkleTree.js
@@ -78,6 +78,10 @@ class MerkleTree {
    * @param {Array} elements Elements to insert
    */
   bulkInsert(elements) {
+    if (!elements.length) {
+      return
+    }
+
     if (this._layers[0].length + elements.length > this.capacity) {
       throw new Error('Tree is full')
     }