From c511e059c46a26c9dec2e55b627324ddee2cd119 Mon Sep 17 00:00:00 2001
From: SDargarh <sdargarh26@gmail.com>
Date: Mon, 22 Jul 2024 17:49:15 +0530
Subject: [PATCH] Added functionality to sign message

---
 CHANGELOG.md      |  3 ++-
 package-lock.json |  3 ++-
 package.json      |  3 ++-
 src/index.js      | 14 ++++++++++++++
 4 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index a1ea987..6d16828 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,4 +5,5 @@
 - Implemented Keyring functionality to enable account generation and export keys
 - Added getAccounts() method to fetch list of generated accounts
 - Added importWallet() to import account using privateKey
-- Added initial test
\ No newline at end of file
+- Added initial test
+- Added functionality to sign message
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index e94cf59..634632b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,8 @@
         "ed25519-hd-key": "^1.3.0",
         "mocha": "^10.7.0",
         "nyc": "^17.0.0",
-        "obs-store": "^4.0.3"
+        "obs-store": "^4.0.3",
+        "tweetnacl": "^1.0.3"
       }
     },
     "node_modules/@ampproject/remapping": {
diff --git a/package.json b/package.json
index 83661ea..12dd9ee 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
     "ed25519-hd-key": "^1.3.0",
     "mocha": "^10.7.0",
     "nyc": "^17.0.0",
-    "obs-store": "^4.0.3"
+    "obs-store": "^4.0.3",
+    "tweetnacl": "^1.0.3"
   }
 }
diff --git a/src/index.js b/src/index.js
index e6ea0c5..6d39fb5 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,6 +1,7 @@
 const ObservableStore = require("obs-store");
 const bs58 = require("bs58");
 const helper = require("./helper");
+const nacl = require('tweetnacl');
 
 
 const { solana: { HD_PATH }, solana_connection: { MAINNET }} = require('./config')
@@ -55,6 +56,19 @@ class KeyringController {
     }
   }
 
+  async signMessage(message, _address) {
+    const { mnemonic, address } = this.store.getState()
+    const idx = address.indexOf(_address);
+
+    if (idx < 0)
+      throw "Invalid address, the address is not available in the wallet"
+    
+    const accountDetails = helper.setupAccount(mnemonic, helper.getHDPath(idx))
+    const msg = Buffer.from(message)
+    
+    return { signedMessage: bs58.encode(nacl.sign.detached(msg, accountDetails.secretKey)) };
+  }
+
   persistAllAddress(_address) {
     const { address } = this.store.getState();
     let newAdd = address;