toJson method
Implementation
Map<String, String?> toJson() {
final data = <String, String?>{};
data['user_email'] = userEmail;
data['pay_for'] = payFor;
data['receive_amount'] = amount.toString();
data['ticker'] = ticker;
data['interface_ticker'] = interfaceTicker;
data['recipient'] = recipient;
data['pay_mode'] = payMode;
data['pay_amount'] = amount.toString();
data['url_success_enc'] = urlSuccessEnc;
data['url_fail_enc'] = urlFailEnc;
additionalParams.forEach((key, value) => data["onpay_ap_$key"] = value);
return data;
}