bring in khatru and eventstore.

eventstore/store.go

@@ -0,0 +1,32 @@
+package eventstore
+
+import (
+	"context"
+
+	"github.com/nbd-wtf/go-nostr"
+)
+
+// Store is a persistence layer for nostr events handled by a relay.
+type Store interface {
+	// Init is called at the very beginning by [Server.Start], after [Relay.Init],
+	// allowing a storage to initialize its internal resources.
+	Init() error
+
+	// Close must be called after you're done using the store, to free up resources and so on.
+	Close()
+
+	// QueryEvents should return a channel with the events as they're recovered from a database.
+	//   the channel should be closed after the events are all delivered.
+	QueryEvents(context.Context, nostr.Filter) (chan *nostr.Event, error)
+	// DeleteEvent just deletes an event, no side-effects.
+	DeleteEvent(context.Context, *nostr.Event) error
+	// SaveEvent just saves an event, no side-effects.
+	SaveEvent(context.Context, *nostr.Event) error
+	// ReplaceEvent atomically replaces a replaceable or addressable event.
+	// Conceptually it is like a Query->Delete->Save, but streamlined.
+	ReplaceEvent(context.Context, *nostr.Event) error
+}
+
+type Counter interface {
+	CountEvents(context.Context, nostr.Filter) (int64, error)
+}