open method
Opens checkout
Implementation
void open(MomoPaymentInfo options) async {
PaymentResponse validationResult = _validateOptions(options);
if (!validationResult.isSuccess!) {
_handleResult({'type': _CODE_PAYMENT_ERROR, 'data': validationResult});
return;
}
var response = await _channel.invokeMethod('open', options.toJson());
_handleResult({'data': response, 'type': response['status']});
}