IsValidPublicKey() and IsValid32ByteHex() replacing IsValidPublicKeyHex()

utils.go

@@ -1,6 +1,7 @@
 package nostr
 
 import (
+	"encoding/hex"
 	"net/url"
 	"strings"
 )
@@ -18,3 +19,14 @@ func IsValidRelayURL(u string) bool {
 	}
 	return true
 }
+
+func IsValid32ByteHex(thing string) bool {
+	if strings.ToLower(thing) != thing {
+		return false
+	}
+	if len(thing) != 64 {
+		return false
+	}
+	_, err := hex.DecodeString(thing)
+	return err == nil
+}