userCanPay method
Determines whether a user can pay with the provider in the configuration.
Completes with a PlatformException if the native call fails or otherwise
returns a boolean for the paymentConfiguration
specified.
Implementation
@override
Future<bool> userCanPay(PaymentConfiguration paymentConfiguration) async {
return await _channel.invokeMethod(
'userCanPay', jsonEncode(await paymentConfiguration.parameterMap()))
as bool;
}