From ce4615d407bc86303bf58c4a733a7250fab87abc Mon Sep 17 00:00:00 2001
From: Michele Balistreri <michele@bitgamma.com>
Date: Wed, 2 Oct 2024 09:55:12 +0200
Subject: [PATCH] implement wallet address function

---
 package-lock.json                   |  7 +++++++
 package.json                        |  1 +
 src/components/steps/HomeScreen.tsx | 17 ++++++++++++++++-
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/package-lock.json b/package-lock.json
index ac4b16e..d621f89 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,7 @@
       "dependencies": {
         "@noble/hashes": "^1.5.0",
         "@react-native-async-storage/async-storage": "^2.0.0",
+        "bech32": "^2.0.0",
         "react": "18.3.1",
         "react-native": "0.75.3",
         "react-native-modal": "^13.0.1",
@@ -5709,6 +5710,12 @@
       ],
       "license": "MIT"
     },
+    "node_modules/bech32": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/bech32/-/bech32-2.0.0.tgz",
+      "integrity": "sha512-LcknSilhIGatDAsY1ak2I8VtGaHNhgMSYVxFrGLXv+xLHytaKZKcaUJJUE7qmBr7h33o5YQwP55pMI0xmkpJwg==",
+      "license": "MIT"
+    },
     "node_modules/bl": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
diff --git a/package.json b/package.json
index cc9ce4c..bd77105 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
   "dependencies": {
     "@noble/hashes": "^1.5.0",
     "@react-native-async-storage/async-storage": "^2.0.0",
+    "bech32": "^2.0.0",
     "react": "18.3.1",
     "react-native": "0.75.3",
     "react-native-modal": "^13.0.1",
diff --git a/src/components/steps/HomeScreen.tsx b/src/components/steps/HomeScreen.tsx
index 02ed5f5..59404ac 100644
--- a/src/components/steps/HomeScreen.tsx
+++ b/src/components/steps/HomeScreen.tsx
@@ -2,6 +2,10 @@ import {FC, useEffect, useState } from "react";
 import { SafeAreaView, StyleSheet, Text, View } from "react-native";
 import Button from "../Button";
 import { Camera, useCameraDevice, useCameraPermission, useCodeScanner } from "react-native-vision-camera";
+import { bytesToHex, hexToBytes } from "@noble/hashes/utils";
+import { bech32 } from "bech32";
+import { ripemd160 } from "@noble/hashes/ripemd160";
+import { sha256 } from "@noble/hashes/sha256";
 
 enum HomeSteps {
   Home,
@@ -41,7 +45,18 @@ const  HomeScreen: FC<HomeScreenProps> = props => {
   });
 
   const walletAddress = () => {
-    return walletKey;
+    var pubkey = hexToBytes(walletKey);
+    if (pubkey[0] == 0x04 && (pubkey.length == 65)) {
+      pubkey[0] = 0x02 | (pubkey[64] & 1);
+      pubkey = pubkey.slice(0, 33);
+    }
+
+    const hash = ripemd160(sha256(pubkey));
+    
+    var words = bech32.toWords(hash);
+    words.unshift(0);
+
+    return bech32.encode('bc', words);
   }
 
   useEffect(() => {