toJson method
Implementation
Map<String, dynamic> toJson() => {
"full_name": fullName,
"email": email,
"amount": amount,
"fee": fee,
"charged_amount": chargedAmount,
"invoice_id": invoiceId,
"payment_method": paymentMethod,
"sender_number": senderNumber,
"transaction_id": transactionId,
"date": date?.toIso8601String(),
"status": status,
};