LAContext invalidated

ios/ReactNativeFingerprintScanner.m

@@ -9,6 +9,7 @@
 @implementation ReactNativeFingerprintScanner
 
 RCT_EXPORT_MODULE();
+LAContext *context;
 
 RCT_EXPORT_METHOD(isSensorAvailable: (RCTResponseSenderBlock)callback)
 {
@@ -47,7 +48,7 @@ @implementation ReactNativeFingerprintScanner
                   fallback: (BOOL)fallbackEnabled
                   callback: (RCTResponseSenderBlock)callback)
 {
-    LAContext *context = [[LAContext alloc] init];
+    context = [[LAContext alloc] init];
     NSError *error;
 
     // Toggle fallback button
@@ -121,6 +122,10 @@ @implementation ReactNativeFingerprintScanner
     }
 }
 
+RCT_EXPORT_METHOD(invalidate){
+    [context invalidate];
+}
+
 - (NSString *)getBiometryType:(LAContext *)context
 {
     if (@available(iOS 11, *)) {

src/index.js

@@ -1,9 +1,11 @@
 import authenticate from './authenticate';
 import isSensorAvailable from './isSensorAvailable';
 import release from './release';
+import invalidate from './invalidate';
 
 export default {
   authenticate,
   release,
   isSensorAvailable,
+  invalidate,
 };

src/invalidate.android.js

@@ -0,0 +1 @@
+export default () => null;

src/invalidate.ios.js

@@ -0,0 +1,8 @@
+import { NativeModules } from 'react-native';
+
+const { ReactNativeFingerprintScanner } = NativeModules;
+
+export default () => {
+   return ReactNativeFingerprintScanner.invalidate();
+}
+