completed batch feature

lib/screens/transactions/transaction_model.dart

@@ -60,16 +60,16 @@ class TransactionModel {
   final String reference;
   final String paymentProcessorLabel;
   final String? integrationProcessorLabel;
-  final String confirmationProcessorLabel;
-  final String providerLabel;
+  final String? confirmationProcessorLabel;
+  final String? providerLabel;
   final String debitPhone;
   final String debitCurrency;
-  final String debitRef;
+  final String? debitRef;
   final String? creditPhone;
   final String? creditAccount;
   final String? creditRef;
   final String? billClientId;
-  final String billName;
+  final String? billName;
   final String paymentProcessorName;
   final String? providerImage;
   final String? paymentProcessorImage;
@@ -108,16 +108,16 @@ class TransactionModel {
     required this.reference,
     required this.paymentProcessorLabel,
     this.integrationProcessorLabel,
-    required this.confirmationProcessorLabel,
-    required this.providerLabel,
+    this.confirmationProcessorLabel,
+    this.providerLabel,
     required this.debitPhone,
     required this.debitCurrency,
-    required this.debitRef,
+    this.debitRef,
     this.creditPhone,
     this.creditAccount,
     this.creditRef,
     this.billClientId,
-    required this.billName,
+    this.billName,
     required this.paymentProcessorName,
     this.providerImage,
     this.paymentProcessorImage,

lib/screens/transactions/transaction_model.g.dart

@@ -27,16 +27,16 @@ TransactionModel _$TransactionModelFromJson(Map<String, dynamic> json) =>
       reference: json['reference'] as String,
       paymentProcessorLabel: json['paymentProcessorLabel'] as String,
       integrationProcessorLabel: json['integrationProcessorLabel'] as String?,
-      confirmationProcessorLabel: json['confirmationProcessorLabel'] as String,
-      providerLabel: json['providerLabel'] as String,
+      confirmationProcessorLabel: json['confirmationProcessorLabel'] as String?,
+      providerLabel: json['providerLabel'] as String?,
       debitPhone: json['debitPhone'] as String,
       debitCurrency: json['debitCurrency'] as String,
-      debitRef: json['debitRef'] as String,
+      debitRef: json['debitRef'] as String?,
       creditPhone: json['creditPhone'] as String?,
       creditAccount: json['creditAccount'] as String?,
       creditRef: json['creditRef'] as String?,
       billClientId: json['billClientId'] as String?,
-      billName: json['billName'] as String,
+      billName: json['billName'] as String?,
       paymentProcessorName: json['paymentProcessorName'] as String,
       providerImage: json['providerImage'] as String?,
       paymentProcessorImage: json['paymentProcessorImage'] as String?,