Prepare package to self-host in Gitea npm registry

Bulk insert

.nvmrc

@@ -0,0 +1 @@
+v14.21.3

package.json

@@ -1,8 +1,8 @@
 {
-  "name": "fixed-merkle-tree",
-  "version": "0.6.0",
+  "name": "@tornado/fixed-merkle-tree",
+  "version": "0.6.1",
   "description": "Fixed depth merkle tree implementation with sequential inserts",
-  "repository": "https://github.com/tornadocash/fixed-merkle-tree.git",
+  "repository": "https://git.tornado.ws/tornado-packages/fixed-merkle-tree.git",
   "main": "src/merkleTree.js",
   "scripts": {
     "test": "mocha",
@@ -19,8 +19,8 @@
     "src/*"
   ],
   "dependencies": {
-    "snarkjs": "git+https://github.com/tornadocash/snarkjs.git#869181cfaf7526fe8972073d31655493a04326d5",
-    "circomlib": "git+https://github.com/tornadocash/circomlib.git#5beb6aee94923052faeecea40135d45b6ce6172c"
+    "@tornado/circomlib": "0.0.21",
+    "@tornado/snarkjs": "0.1.20"
   },
   "devDependencies": {
     "babel-eslint": "^10.1.0",

src/merkleTree.js

@@ -22,13 +22,13 @@ class MerkleTree {
    * @param {hashFunction} [options.hashFunction] Function used to hash 2 leaves
    * @param [options.zeroElement] Value for non-existent leaves
    */
-  constructor(levels, elements = [], { hashFunction = defaultHash, zeroElement = DEFAULT_ZERO } = {}) {
+  constructor(levels, elements = [], { hashFunction, zeroElement = DEFAULT_ZERO } = {}) {
     this.levels = levels
     this.capacity = 2 ** levels
     if (elements.length > this.capacity) {
       throw new Error('Tree is full')
     }
-    this._hash = hashFunction
+    this._hash = hashFunction || defaultHash
     this.zeroElement = zeroElement
     this._zeros = []
     this._zeros[0] = zeroElement
@@ -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')
     }

src/mimc.js

@@ -1,3 +1,3 @@
-const { mimcsponge } = require('circomlib')
-const { bigInt } = require('snarkjs')
+const { mimcsponge } = require('@tornado/circomlib')
+const { bigInt } = require('@tornado/snarkjs')
 module.exports = (left, right) => mimcsponge.multiHash([bigInt(left), bigInt(right)]).toString()