nip46: support nip05 identifier in client.

nip46/wellknownnostrjson.go

@@ -0,0 +1,26 @@
+package nip46
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/nbd-wtf/go-nostr/nip05"
+)
+
+func queryWellKnownNostrJson(ctx context.Context, fullname string) (pubkey string, relays []string, err error) {
+	result, name, err := nip05.Fetch(ctx, fullname)
+	if err != nil {
+		return "", nil, err
+	}
+
+	pubkey, ok := result.Names[name]
+	if !ok {
+		return "", nil, fmt.Errorf("no entry found for the '%s' name", name)
+	}
+	relays, _ = result.NIP46[pubkey]
+	if !ok {
+		return "", nil, fmt.Errorf("no bunker relays found for the '%s' name", name)
+	}
+
+	return pubkey, relays, nil
+}