proof

type TLogProof struct {
	// Index is the index of an entry in the log
	Index uint64
	// Hashes is the Merkle inclusion proof as described in https://www.rfc-editor.org/rfc/rfc6962.html#section-2.1.1
	Hashes [][sha256.Size]byte
	// Checkpoint is the signed note as described in https://c2sp.org/tlog-checkpoint
	Checkpoint []byte
	// ExtraData contains optional application-specific data
	ExtraData []byte
}