signing

type Attestation interface {
	// Cert returns the certificate used to sign the attestation.
	Cert() []byte

	// Bytes returns the signed attestation as an encoded DSSE JSON envelope.
	Bytes() []byte
}

type LogEntry interface {
	// ID returns the ID of the transparency log.
	ID() string

	// LogIndex return the index of the transparency log entry.
	LogIndex() int64

	// UUID return the uuid of the transparency log entry.
	UUID() string
}

type Signer interface {
	// Sign signs the given provenance statement and returns the signed
	// attestation.
	Sign(context.Context, *intoto.Statement) (Attestation, error)
}

type TransparencyLog interface {
	// Upload uploads the signed attestation to the transparency log.
	Upload(context.Context, Attestation) (LogEntry, error)
}