add KeepRecentEvents

postgresql/postgresql.go

@@ -12,6 +12,7 @@ type PostgresBackend struct {
 	QueryAuthorsLimit int
 	QueryKindsLimit   int
 	QueryTagsLimit    int
+	KeepRecentEvents  bool
 }
 
 func (b *PostgresBackend) Close() {

postgresql/save.go

@@ -32,6 +32,9 @@ func (b *PostgresBackend) BeforeSave(ctx context.Context, evt *nostr.Event) {
 }
 
 func (b *PostgresBackend) AfterSave(evt *nostr.Event) {
+	if b.KeepRecentEvents {
+		return
+	}
 	// delete all but the 100 most recent ones for each key
 	b.DB.Exec(`DELETE FROM event WHERE pubkey = $1 AND kind = $2 AND created_at < (
       SELECT created_at FROM event WHERE pubkey = $1