if err != nil {
		return err
	}

	for _, key := range jwk.Keys {
		pkey, err := key.DecodePublicKey()
		if err != nil {
			return err
		}
		pk.add(key.Kid, pkey)
	}

	return nil
}

func (pk *publicKeys) add(keyID string, key interface{}) {
	pk.Lock()
	defer pk.Unlock()

	pk.pkMap[keyID] = key
}

func (pk *publicKeys) get(kid string) interface{} {
	pk.RLock()

}

var cacheLRU = expirable.NewLRU[cacheKey, string](1000, nil, 15*time.Second)

func authenticateNode(accessKey, secretKey, audience string) (string, error) {
	claims := xjwt.NewStandardClaims()
	claims.SetExpiry(UTCNow().Add(defaultInterNodeJWTExpiry))
	claims.SetAccessKey(accessKey)
	claims.SetAudience(audience)

	jwt := jwtgo.NewWithClaims(jwtgo.SigningMethodHS512, claims)
	return jwt.SignedString([]byte(secretKey))
}