const (
	V1KeySize = 32
)

var (
	ErrTokenIsNotValid     = errors.New("jst: token is not valid")
	ErrSignatureIsNotValid = errors.New("jst: signature is not valid")
	ErrTokenHasExpired     = errors.New("jst: token has expired")
)

var (
	ErrKeyNotFound = func(keyId string) error {
		return fmt.Errorf("key (%s) not found", keyId)
	}
)

type HeaderV1 struct {
	ExpiresAt   *time.Time `json:"expires_at,omitempty"`
	NotBefore   *time.Time `json:"not_before,omitempty"`
	IssuedAt    *time.Time `json:"issued_at,omitempty"`
	KeyID       string     `json:"key_id,omitempty"`
	Compression string     `json:"compression,omitempty"`
	Nonce       []byte     `json:"nonce"`
}

type KeyProvider interface {
	GetKey(keyId string) (key []byte, err error)
}

type KeyProviderMemory struct {
	// contains filtered or unexported fields
}

type Provider struct {
	// contains filtered or unexported fields
}

type TokenOptions struct {
	NotBefore   *time.Time
	IssuedAt    *time.Time
	KeyID       string
	Compression string
}