updating the typing as well as documentation to fix the isPinOrFingerprintSet issue #153

README.md

@@ -184,12 +184,12 @@ var DeviceInfo = require('react-native-device-info');
 | App Instance ID            | `getInstanceID()`                  |                                                                                               | ANDROID ONLY - see https://developers.google.com/instance-id/                                                    |
 | App is running in emulator | `isEmulator()`                     | true                                                                                          | if app is running in emulator return true                                                                        |
 | App is running on a tablet | `isTablet()`                       | true                                                                                          | if app is running on a tablet return true                                                                        |
-| PIN or fingerprint set     | `isPinOrFingerprintSet(callback)`|                                                                                               | Only supported in Android and iOS 9.0 and above
+| PIN or fingerprint set     | `isPinOrFingerprintSet()(callback)`|                                                                                               | Only supported in Android and iOS 9.0 and above
 
-Since the device setting for PIN/Fingerprint can be modified while the app is still open, this is available via callback instead of as a constant.  To use, pass a callback function in your javascript:
+Since the device setting for PIN/Fingerprint can be modified while the app is still open, this is available via callback instead of as a constant.  To use, pass a callback function to the returned bridge function in your javascript:
 
 ```js
-RNDeviceInfo.isPinOrFingerprintSet(isPinOrFingerprintSet => {
+RNDeviceInfo.isPinOrFingerprintSet()(isPinOrFingerprintSet => {
   if (!isPinOrFingerprintSet) {
     ...
   }

deviceinfo.d.ts

@@ -21,7 +21,7 @@ declare class DeviceInfo {
   public static getInstanceID(): string;
   public static isEmulator(): boolean;
   public static isTablet(): boolean;
-  public static isPinOrFingerprintSet(cb: (isSet: boolean) => void): void;
+  public static isPinOrFingerprintSet(): (cb: (isPinOrFingerprintSet: boolean) => void) => void;
 }
 
 export default DeviceInfo;