Рыба проекта. Минимальная функциональность

pkg/domain/sink.go

@@ -0,0 +1,17 @@
+package domain
+
+import "io"
+
+// Sink defines the contract for a storage sink that supports atomic two-phase writes.
+type Sink interface {
+	Begin(key string) (SinkTx, error)
+	List(prefix string) ([]string, error)
+	Remove(key string) error
+}
+
+// SinkTx represents an in-progress write transaction.
+type SinkTx interface {
+	io.Writer
+	Commit() error
+	Abort() error
+}