frostfs-api/proto-docs/refs.md

Protocol Documentation

Table of Contents

• refs/types.proto

  • Messages
    • Address
    • Checksum
    • ContainerID
    • ObjectID
    • OwnerID
    • Signature
    • Version

• Scalar Value Types

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refs/types.proto

Message Address

Object in NeoFS can be addressed by it's ContainerID and ObjectID. In string format there MUST be a '/' delimeter between them.

Field	Type	Label	Description
container_id	ContainerID		Container identifier
object_id	ObjectID		Object identifier

Message Checksum

Checksum message.

Field	Type	Label	Description
type	ChecksumType		Checksum algorithm type
sum	bytes		Checksum itself

Message ContainerID

NeoFS container identifier. Container structures are immutable and content-addressed. ContainerID is a 32 byte long SHA256 hash of stable-marshalled container message.

Field	Type	Label	Description
value	bytes		Container identifier in a binary format.

Message ObjectID

NeoFS Object unique identifier. Objects are immutable and content-addressed. It means ObjectID will change if header or payload changes. ObjectID is calculated as a hash of header field, which contains hash of object's payload.

Field	Type	Label	Description
value	bytes		Object identifier in a binary format

Message OwnerID

OwnerID is a derivative of a user's main public key. The transformation algorithm is the same as for Neo3 wallet addresses. Neo3 wallet address can be directly used as OwnerID.

Field	Type	Label	Description
value	bytes		Identifier of the container owner in a binary format

Message Signature

Signature of something in NeoFS.

Field	Type	Label	Description
key	bytes		Public key used for signing
sign	bytes		Signature

Message Version

API version used by a node.

Field	Type	Label	Description
major	uint32		Major API version
minor	uint32		Minor API version

ChecksumType

Checksum algorithm type.

Name	Number	Description
CHECKSUM_TYPE_UNSPECIFIED	0	Unknown. Not used
TZ	1	Tillich-Zemor homomorphic hash function
SHA256	2	SHA-256

Scalar Value Types

.proto Type	Notes	C++ Type	Java Type	Python Type
double		double	double	float
float		float	float	float
int32	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint32 instead.	int32	int	int
int64	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint64 instead.	int64	long	int/long
uint32	Uses variable-length encoding.	uint32	int	int/long
uint64	Uses variable-length encoding.	uint64	long	int/long
sint32	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.	int32	int	int
sint64	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s.	int64	long	int/long
fixed32	Always four bytes. More efficient than uint32 if values are often greater than 2^28.	uint32	int	int
fixed64	Always eight bytes. More efficient than uint64 if values are often greater than 2^56.	uint64	long	int/long
sfixed32	Always four bytes.	int32	int	int
sfixed64	Always eight bytes.	int64	long	int/long
bool		bool	boolean	boolean
string	A string must always contain UTF-8 encoded or 7-bit ASCII text.	string	String	str/unicode
bytes	May contain any arbitrary sequence of bytes.	string	ByteString	str