openSigningUrl method
Opens url (a UAE Pass e-signature UI URL) natively, applying the
same app-switch/deep-link mechanics as nativeSignIn, until either
the flow reaches a URL matching finishUri (compared by scheme, host
and path) or the resulting URL carries a status query parameter —
matching UAE Pass's own documented signing-completion signal.
Returns the final URL as a string, or null if the user cancelled by
closing the native UI.
Implementation
Future<String?> openSigningUrl({
required String url,
required Uri finishUri,
}) {
throw UnimplementedError('openSigningUrl() has not been implemented.');
}