handle events_decrypted

lib/models/events_decrypted.dart

@@ -0,0 +1,23 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:freezed_annotation/freezed_annotation.dart";
+import "package:nexus/models/epoch_date_time_converter.dart";
+import "package:nexus/models/event.dart";
+import "package:nexus/models/room.dart";
+
+part "events_decrypted.freezed.dart";
+part "events_decrypted.g.dart";
+
+@Freezed(toJson: false, fromJson: false)
+@JsonSerializable(createToJson: false)
+class const EventsDecrypted({
+  required final String roomId,
+  @JsonKey(name: "preview_event_rowid") final int? previewEventRowID,
+  @EpochDateTimeConverter() final DateTime? sortingTimestamp,
+
+  /// [events] is an IMap of eventRowId to event
+  @JsonKey(fromJson: Room.eventsJsonToIMap)
+  required final IMap<int, Event> events,
+}) with _$EventsDecrypted {
+  factory EventsDecrypted.fromJson(Map<String, Object?> json) =>
+      _$EventsDecryptedFromJson(json);
+}