SaveEnvelope class
Wrapper around a JSON-safe payload with schema metadata.
Constructors
-
SaveEnvelope({required int schemaVersion, required int createdAtMs, required int updatedAtMs, required Map<
String, dynamic> payload, SaveChangeSet? changeSet, String? saveReason, String? checksum}) -
Creates a save envelope with schema/timestamp metadata.
const
Properties
- changeSet → SaveChangeSet?
-
Optional change set describing what changed.
final
- checksum → String?
-
Optional checksum over the payload.
final
- createdAtMs → int
-
Creation timestamp in milliseconds since epoch.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
-
payload
→ Map<
String, dynamic> -
JSON-safe payload.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- saveReason → String?
-
Optional reason describing why the save was written.
final
- schemaVersion → int
-
Schema version of the payload.
final
- updatedAtMs → int
-
Last update timestamp in milliseconds since epoch.
final
Methods
-
copyWith(
{int? schemaVersion, int? createdAtMs, int? updatedAtMs, Map< String, dynamic> ? payload, Object? changeSet = _sentinel, Object? saveReason = _sentinel, Object? checksum = _sentinel}) → SaveEnvelope - Returns a copy with selected fields replaced.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toJson(
) → Map< String, dynamic> - Serializes the envelope to a JSON-safe map.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
fromJson(
Map< String, dynamic> json) → SaveEnvelope - Parses an envelope from a JSON-safe map.