fixed-merkle-tree 0.7.3-p0

Signed-off-by: T-Hax <>

@tornado/fixed-merkle-tree/src/simpleHash.ts

@@ -0,0 +1,22 @@
+import { Element } from './'
+
+/***
+ * This is insecure hash function, just for example only
+ * @param data
+ * @param seed
+ * @param hashLength
+ */
+
+export function simpleHash<T>(data: T[], seed?: number, hashLength = 40): string {
+  const str = data.join('')
+  let i, l,
+    hval = seed ?? 0x811c9dcc5
+  for (i = 0, l = str.length; i < l; i++) {
+    hval ^= str.charCodeAt(i)
+    hval += (hval << 1) + (hval << 4) + (hval << 6) + (hval << 8) + (hval << 24)
+  }
+  const hash = (hval >>> 0).toString(16)
+  return BigInt('0x' + hash.padEnd(hashLength - (hash.length - 1), '0')).toString(10)
+}
+
+export default (left: Element, right: Element): string => simpleHash([left, right])