a readme.

README.md

@@ -0,0 +1,31 @@
+# eventstore
+
+A collection of reusable database connectors, wrappers and schemas that store Nostr events and expose a simple Go interface:
+
+```go
+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 is invoked upon a client's REQ as described in NIP-01.
+	// it 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 is used to handle deletion events, as per NIP-09.
+	DeleteEvent(context.Context, *nostr.Event) error
+
+	// SaveEvent is called once Relay.AcceptEvent reports true.
+	SaveEvent(context.Context, *nostr.Event) error
+}
+```
+
+[![Go Reference](https://pkg.go.dev/badge/github.com/fiatjaf/eventstore.svg)](https://pkg.go.dev/github.com/fiatjaf/eventstore)
+
+## command-line tool
+
+There is an [`eventstore` command-line tool](cli) that can be used to query these databases directly.