auth

type Claims struct {
	NodeID string `json:"node_id"`
	Issued int64  `json:"iat"`
	Expiry int64  `json:"exp"`
}

type Clock interface {
	Now() time.Time
}

type RealClock struct{}

type TokenSigner struct {
	Secret []byte
	Now    func() time.Time
	TTL    time.Duration
}