diff --git a/nip54/nip54.go b/nip54/nip54.go
new file mode 100644
index 0000000..4b06f14
--- /dev/null
+++ b/nip54/nip54.go
@@ -0,0 +1,17 @@
+package nip54
+
+import (
+	"regexp"
+	"strings"
+
+	"golang.org/x/text/transform"
+	"golang.org/x/text/unicode/norm"
+)
+
+var nonLetter = regexp.MustCompile(`\W`)
+
+func NormalizeIdentifier(name string) string {
+	res, _, _ := transform.Bytes(norm.NFKC, []byte(name))
+	str := nonLetter.ReplaceAllString(string(res), "-")
+	return strings.ToLower(str)
+}