Touch ID

import { TouchID } from '@ionic-native/touch-id';

constructor(private touchId: TouchID) { }

...

this.touchId.isAvailable()
  .then(
    res => console.log('TouchID is available!'),
    err => console.error('TouchID is not available', err)
  );

this.touchId.verifyFingerprint('Scan your fingerprint please')
  .then(
    res => console.log('Ok', res),
    err => console.error('Error', err)
  );

Error Codes

The plugin will reject for various reasons. Your app will most likely need to respond to the cases differently.

Here is a list of some of the error codes:

• -1 - Fingerprint scan failed more than 3 times
• -2 or -128 - User tapped the 'Cancel' button
• -3 - User tapped the 'Enter Passcode' or 'Enter Password' button
• -4 - The scan was cancelled by the system (Home button for example)
• -6 - TouchID is not Available
• -8 - TouchID is locked out from too many tries