From 3e89d53d25a7b42e49898271c7be7fd56ec0af43 Mon Sep 17 00:00:00 2001
From: Alexey <peretsmobil@gmail.com>
Date: Fri, 10 Apr 2020 12:58:17 +0300
Subject: [PATCH] utxo class init

---
 src/index.ts | 34 ++++++----------------------------
 src/utxo.ts  | 25 +++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 28 deletions(-)
 create mode 100644 src/utxo.ts

diff --git a/src/index.ts b/src/index.ts
index c2e69d7..c760647 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,36 +1,14 @@
 
 import BigNumber from "bignumber.js"
 
-class UTXO {
-  amount: BigNumber;
-  blinding: BigNumber;
-  pubkey: BigNumber;
-  privkey: BigNumber;
-  commitment: BigNumber;
-  treeIndex: Boolean[];
-  nullifier: BigNumber;
-
-  constructor(
-    amount,
-    blinding,
-    pubkey,
-    privkey,
-    commitment,
-    treeIndex,
-    nullifier,
-  ) {
-
-  }
-}
-
-class Transaction {
-  inputs: UTXO[];
-  outputs: UTXO[];
-
-}
+import { Utxo } from './Utxo'
+const { bigInt } = require('snarkjs')
+const crypto = require('crypto')
+const rbigint = (nbytes = 31) => bigInt.leBuff2int(crypto.randomBytes(nbytes))
 
 async function main() {
-  const deposit = new UTXO();
+  const zeroUtxo = new Utxo(bigInt(0), rbigint(), rbigint())
+  console.log('zeroUtxo publicKey', zeroUtxo.publicKey())
 }
 
 main()
diff --git a/src/utxo.ts b/src/utxo.ts
new file mode 100644
index 0000000..4400e7e
--- /dev/null
+++ b/src/utxo.ts
@@ -0,0 +1,25 @@
+
+const Hasher = require('../lib/mimc')
+const hasher = new Hasher()
+const { bigInt } = require('snarkjs')
+
+export class Utxo {
+  amount: bigint;
+  blinding: bigint;
+  privateKey: bigint;
+
+  // commitment: bigint;
+  // treeIndex: Boolean[];
+  // nullifier: bigint;
+
+  constructor(amount?: bigint, blinding?: bigint, privateKey?: bigint) {
+    this.amount = amount || bigInt(0);
+    this.blinding = blinding || bigInt(0);
+    this.privateKey = privateKey || bigInt(0);
+  }
+
+  publicKey() {
+    return hasher.hashArray([this.privateKey])
+  }
+}
+