fix Note.fromString method parsing

package.json

@@ -1,6 +1,6 @@
 {
   "name": "tornado-anonymity-mining",
-  "version": "2.1.2",
+  "version": "2.1.3",
   "main": "index.js",
   "repository": "https://github.com/tornadocash/tornado-anonymity-mining.git",
   "author": "Tornadocash team <hello@tornado.cash>",

src/note.js

@@ -25,11 +25,10 @@ class Note {
   }
 
   static fromString(note, instance, depositBlock, withdrawalBlock) {
-    note = note.split('-')
-    const [, currency, amount, netId] = note
-    const hexNote = note[4].slice(2)
-    const nullifier = new BN(hexNote.slice(0, 62), 16, 'le')
-    const secret = new BN(hexNote.slice(62), 16, 'le')
+    const [, currency, amount, netId, noteHex] = note.split('-')
+    const noteBuff = Buffer.from(noteHex.slice(2), 'hex')
+    const nullifier = new BN(noteBuff.slice(0, 31), 16, 'le')
+    const secret = new BN(noteBuff.slice(31), 16, 'le')
     return new Note({
       secret,
       nullifier,

test/miner.test.js

@@ -225,6 +225,22 @@ contract('Miner', (accounts) => {
       note.commitment.should.be.eq.BN(
         toBN('0x1a08fd10dae9806ce25b62582e44d237c1cb9f8d6bf73e756f18d0e5d7a7351a'),
       )
+      const note1 = Note.fromString(
+        'tornado-eth-1-5-0x00b9787ae8b877cc612acfc3d46eb1303c618ef386cb4383b75be5b300ac9b94818f3f7a589b4667612e879dbfd44198231c86aaa412a3770fd86d8fc045',
+        '0x8b3f5393bA08c24cc7ff5A66a832562aAB7bC95f',
+        10,
+        15,
+      )
+      note1.secret.should.be.eq.BN(toBN('0x45c08f6dd80f77a312a4aa861c239841d4bf9d872e6167469b587a3f8f8194'))
+      note1.nullifier.should.be.eq.BN(
+        toBN('0x9bac00b3e55bb78343cb86f38e613c30b16ed4c3cf2a61cc77b8e87a78b900'),
+      )
+      note1.nullifierHash.should.be.eq.BN(
+        toBN('0x1892018e434ed0476992c7e05e6022b69eacf746a978191117194d180104aed1'),
+      )
+      note1.commitment.should.be.eq.BN(
+        toBN('0x270a865e2bf7de26b0a6de08c527f4d13e2b49026f6aaeeea0866a9dd39e19f6'),
+      )
     })
   })