SyncCheckpoint class

--- SyncCheckpoint --- Represents the sync state checkpoint for pagination.

Uses the monotonic syncId for deterministic ordering and resumable pagination. This approach ensures:

1. Consistent ordering using monotonically increasing IDs
2. Ability to resume from exact point after interruption
3. Simple and efficient pagination (WHERE syncId > afterId)

Immutable value object following clean architecture principles.

Constructors

SyncCheckpoint({required BigInt afterId})

const

SyncCheckpoint.fromJson(Map<String, dynamic> json)

Deserialize from stored map

factory

SyncCheckpoint.fromSyncable(BigInt syncId)

Create checkpoint from a syncable item

factory

Properties

afterId → BigInt

Fetch items AFTER this ID. Query: WHERE syncId > afterId Example: afterId=100 → fetch items 101, 102, 103...

final

hashCode → int

The hash code for this object.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toJson() → Map<String, dynamic>

Serialize to map for storage

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override