package licensing

// NoOpSigner returns an empty signature. Used when neither YAMA_SIGN_PASSWORD
// nor YAMA_LICENSE_SERVER is set — operator hasn't configured licensing at
// all (free-tier mode). Device list keeps working; the client's private
// library refuses to start screen/file features when it sees a zeroed
// Signature[64] field in CMD_MASTERSETTING.
type NoOpSigner struct{}

func NewNoOp() *NoOpSigner { return &NoOpSigner{} }

func (n *NoOpSigner) Sign(startTime, clientID string) (string, error) {
	return "", nil
}

func (n *NoOpSigner) Mode() string { return "noop" }

func (n *NoOpSigner) Close() error { return nil }