Should be the hash being returned not the value string.

Author: wparad

src/jwtManager.js

@@ -20,7 +20,7 @@ class JwtManager {
       const verifier = `${timestamp};${fineTuner};${valueString}`;
       hash = base64url.encode(crypto.createHash('sha256').update(verifier).digest());
       if (hash.match(/^00/)) {
-        return `v2;${verifier}`;
+        return hash;
       }
     }