From 26992f115a5e5d38898f3c3f87d63d95c1844c68 Mon Sep 17 00:00:00 2001
From: yxshee <84263676+yxshee@users.noreply.github.com>
Date: Mon, 9 Nov 2026 04:10:49 +0530
Subject: [PATCH] fix(isBtcAddress): accept testnet P2PKH addresses starting
 with n

---
 src/lib/isBtcAddress.js | 2 +-
 test/validators.test.js | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/lib/isBtcAddress.js b/src/lib/isBtcAddress.js
index 1a309e682..882300f3a 100644
--- a/src/lib/isBtcAddress.js
+++ b/src/lib/isBtcAddress.js
@@ -1,7 +1,7 @@
 import assertString from './util/assertString';
 
 const bech32 = /^(bc1|tb1|bc1p|tb1p)[ac-hj-np-z02-9]{39,58}$/;
-const base58 = /^(1|2|3|m)[A-HJ-NP-Za-km-z1-9]{25,39}$/;
+const base58 = /^(1|2|3|m|n)[A-HJ-NP-Za-km-z1-9]{25,39}$/;
 
 export default function isBtcAddress(str) {
   assertString(str);
diff --git a/test/validators.test.js b/test/validators.test.js
index 98d2a12ff..21d720530 100644
--- a/test/validators.test.js
+++ b/test/validators.test.js
@@ -12241,6 +12241,7 @@ describe('Validators', () => {
       valid: [
         '1MUz4VMYui5qY1mxUiG8BQ1Luv6tqkvaiL',
         'mucFNhKMYoBQYUAEsrFVscQ1YaFQPekBpg',
+        'n1fprNxRhWrpkJ34A4cNsSZbHsnzhob2KL',
         '3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy',
         '2NFUBBRcTJbYc1D4HSCbJhKZp6YCV4PQFpQ',
         'bc1qar0srrr7xfkvy5l643lydnw9re59gtzzwf5mdq',