From 80576779eba57f0473a4fc92284375d0d8e59577 Mon Sep 17 00:00:00 2001
From: Santiago Semhan <santisemhan2@gmail.com>
Date: Tue, 9 Jun 2026 22:41:40 -0300
Subject: [PATCH 1/2] fix: normalize empty keyAlias to undefined before native
 bridge call

---
 src/index.tsx | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/index.tsx b/src/index.tsx
index 1a8d4e9..8587b39 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -269,12 +269,13 @@ export function verifyKeySignature(
   cancelButtonText?: string,
   returnAuthType?: boolean
 ): Promise<SignatureResult> {
+  const resolvedKeyAlias = keyAlias || undefined;
   logger.debug('Verifying key signature', 'verifyKeySignature', {
     keyAlias,
     dataLength: data.length,
   });
   return ReactNativeBiometrics.verifyKeySignature(
-    keyAlias,
+    resolvedKeyAlias,
     data,
     promptTitle,
     promptSubtitle,
@@ -341,6 +342,8 @@ export function signWithOptions(
     returnAuthType,
   } = options;
 
+  const resolvedKeyAlias = keyAlias || undefined;
+
   logger.debug('Signing with options', 'signWithOptions', {
     keyAlias,
     dataLength: data.length,
@@ -361,7 +364,7 @@ export function signWithOptions(
   // On Android, use the new method with options
   if (Platform.OS === 'android') {
     return ReactNativeBiometrics.verifyKeySignatureWithOptions(
-      keyAlias,
+      resolvedKeyAlias,
       data,
       promptTitle,
       promptSubtitle,
@@ -388,7 +391,7 @@ export function signWithOptions(
 
   // On iOS, use the standard method with inputEncoding
   return ReactNativeBiometrics.verifyKeySignatureWithEncoding(
-    keyAlias,
+    resolvedKeyAlias,
     data,
     promptTitle,
     promptSubtitle,

From ac43cb76c1897e49e9b74bd2e110e88e6050b752 Mon Sep 17 00:00:00 2001
From: Santiago Semhan <santisemhan2@gmail.com>
Date: Tue, 9 Jun 2026 22:53:44 -0300
Subject: [PATCH 2/2] fix: coderabbitai suggestions

---
 src/NativeReactNativeBiometrics.ts | 2 +-
 src/index.tsx                      | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/NativeReactNativeBiometrics.ts b/src/NativeReactNativeBiometrics.ts
index 80f6178..1a205b5 100644
--- a/src/NativeReactNativeBiometrics.ts
+++ b/src/NativeReactNativeBiometrics.ts
@@ -84,7 +84,7 @@ export interface Spec extends TurboModule {
     error?: string;
   }>;
   verifyKeySignature(
-    keyAlias: string,
+    keyAlias: string | null,
     data: string,
     promptTitle?: string,
     promptSubtitle?: string,
diff --git a/src/index.tsx b/src/index.tsx
index 8587b39..74dc88a 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -269,7 +269,7 @@ export function verifyKeySignature(
   cancelButtonText?: string,
   returnAuthType?: boolean
 ): Promise<SignatureResult> {
-  const resolvedKeyAlias = keyAlias || undefined;
+  const resolvedKeyAlias = keyAlias || null;
   logger.debug('Verifying key signature', 'verifyKeySignature', {
     keyAlias,
     dataLength: data.length,
@@ -342,7 +342,7 @@ export function signWithOptions(
     returnAuthType,
   } = options;
 
-  const resolvedKeyAlias = keyAlias || undefined;
+  const resolvedKeyAlias = keyAlias || null;
 
   logger.debug('Signing with options', 'signWithOptions', {
     keyAlias,