a method for identifying nip70 "protected" events.

nip70/nip70.go

@@ -0,0 +1,12 @@
+package nip70
+
+import "github.com/nbd-wtf/go-nostr"
+
+func IsProtected(event *nostr.Event) bool {
+	for _, tag := range event.Tags {
+		if len(tag) == 1 && tag[0] == "-" {
+			return true
+		}
+	}
+	return false
+}