Add NIP-22 support

nip22/nip22.go

@@ -0,0 +1,24 @@
+package nip22
+
+import "github.com/nbd-wtf/go-nostr"
+
+func GetThreadRoot(tags nostr.Tags) *nostr.Tag {
+	for _, tag := range tags {
+		if tag[0] == "E" || tag[0] == "A" || tag[0] == "I" {
+			return &tag
+		}
+	}
+	empty := nostr.Tag{}
+	return &empty
+}
+
+func GetImmediateReply(tags nostr.Tags) *nostr.Tag {
+	for _, tag := range tags {
+		if tag[0] == "e" || tag[0] == "a" || tag[0] == "i" {
+			return &tag
+		}
+	}
+
+	empty := nostr.Tag{}
+	return &empty
+}