frostfs-api/proto-docs/reputation.md

Protocol Documentation

Table of Contents

• reputation/service.proto

• Services

  • ReputationService

• Messages

  • AnnounceIntermediateResultRequest
  • AnnounceIntermediateResultRequest.Body
  • AnnounceIntermediateResultResponse
  • AnnounceIntermediateResultResponse.Body
  • AnnounceLocalTrustRequest
  • AnnounceLocalTrustRequest.Body
  • AnnounceLocalTrustResponse
  • AnnounceLocalTrustResponse.Body

• reputation/types.proto

  • Messages
    • GlobalTrust
    • GlobalTrust.Body
    • PeerID
    • PeerToPeerTrust
    • Trust

• Scalar Value Types

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reputation/service.proto

Service "neo.fs.v2.reputation.ReputationService"

ReputationService provides mechanisms for exchanging trust values with other NeoFS nodes. Nodes rate each other's reputation based on how good they process requests and set a trust level based on that rating. The trust information is passed to the next nodes to check and aggregate unless the final result is recorded.

rpc AnnounceLocalTrust(AnnounceLocalTrustRequest) returns (AnnounceLocalTrustResponse);
rpc AnnounceIntermediateResult(AnnounceIntermediateResultRequest) returns (AnnounceIntermediateResultResponse);

Method AnnounceLocalTrust

Announce local client trust information to any node in NeoFS network.

Statuses:

• OK (0, SECTION_SUCCESS): local trust has been successfully announced;
• Common failures (SECTION_FAILURE_COMMON).

Name	Input	Output
AnnounceLocalTrust	AnnounceLocalTrustRequest	AnnounceLocalTrustResponse

Method AnnounceIntermediateResult

Announces the intermediate result of the iterative algorithm for calculating the global reputation of the node in NeoFS network.

Statuses:

• OK (0, SECTION_SUCCESS): intermediate trust estimation has been successfully announced;
• Common failures (SECTION_FAILURE_COMMON).

Name	Input	Output
AnnounceIntermediateResult	AnnounceIntermediateResultRequest	AnnounceIntermediateResultResponse

Message AnnounceIntermediateResultRequest

Announce intermediate global trust information.

Field	Type	Label	Description
body	AnnounceIntermediateResultRequest.Body		Body of the request message.
meta_header	neo.fs.v2.session.RequestMetaHeader		Carries request meta information. Header data is used only to regulate message transport and does not affect request execution.
verify_header	neo.fs.v2.session.RequestVerificationHeader		Carries request verification information. This header is used to authenticate the nodes of the message route and check the correctness of transmission.

Message AnnounceIntermediateResultRequest.Body

Announce intermediate global trust information.

Field	Type	Label	Description
epoch	uint64		Iteration execution Epoch number
iteration	uint32		Iteration sequence number
trust	PeerToPeerTrust		Current global trust value calculated at the specified iteration

Message AnnounceIntermediateResultResponse

Intermediate global trust information announce response.

Field	Type	Label	Description
body	AnnounceIntermediateResultResponse.Body		Body of the response message.
meta_header	neo.fs.v2.session.ResponseMetaHeader		Carries response meta information. Header data is used only to regulate message transport and does not affect request execution.
verify_header	neo.fs.v2.session.ResponseVerificationHeader		Carries response verification information. This header is used to authenticate the nodes of the message route and check the correctness of transmission.

Message AnnounceIntermediateResultResponse.Body

Response to the node's intermediate global trust information announce has an empty body because the trust exchange operation is asynchronous. If Trust information will not pass sanity checks it is silently ignored.

Message AnnounceLocalTrustRequest

Announce node's local trust information.

Field	Type	Label	Description
body	AnnounceLocalTrustRequest.Body		Body of the request message.
meta_header	neo.fs.v2.session.RequestMetaHeader		Carries request meta information. Header data is used only to regulate message transport and does not affect request execution.
verify_header	neo.fs.v2.session.RequestVerificationHeader		Carries request verification information. This header is used to authenticate the nodes of the message route and check the correctness of transmission.

Message AnnounceLocalTrustRequest.Body

Announce node's local trust information.

Field	Type	Label	Description
epoch	uint64		Trust assessment Epoch number
trusts	Trust	repeated	List of normalized local trust values to other NeoFS nodes. The value is calculated according to EigenTrust++ algorithm and must be a floating point number in the [0;1] range.

Message AnnounceLocalTrustResponse

Node's local trust information announce response.

Field	Type	Label	Description
body	AnnounceLocalTrustResponse.Body		Body of the response message.
meta_header	neo.fs.v2.session.ResponseMetaHeader		Carries response meta information. Header data is used only to regulate message transport and does not affect request execution.
verify_header	neo.fs.v2.session.ResponseVerificationHeader		Carries response verification information. This header is used to authenticate the nodes of the message route and check the correctness of transmission.

Message AnnounceLocalTrustResponse.Body

Response to the node's local trust information announce has an empty body because the trust exchange operation is asynchronous. If Trust information will not pass sanity checks it is silently ignored.

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reputation/types.proto

Message GlobalTrust

Global trust level to NeoFS node.

Field	Type	Label	Description
version	neo.fs.v2.refs.Version		Message format version. Effectively the version of API library used to create the message.
body	GlobalTrust.Body		Message body
signature	neo.fs.v2.refs.Signature		Signature of the binary body field by the manager.

Message GlobalTrust.Body

Message body structure.

Field	Type	Label	Description
manager	PeerID		Node manager ID
trust	Trust		Global trust level

Message PeerID

NeoFS unique peer identifier is 33 byte long compressed public key of the node, the same as the one stored in the network map.

String presentation is base58 encoded string.

JSON value will be the data encoded as a string using standard base64 encoding with paddings. Either standard or URL-safe base64 encoding with/without paddings are accepted.

Field	Type	Label	Description
public_key	bytes		Peer node's public key

Message PeerToPeerTrust

Trust level of a peer to a peer.

Field	Type	Label	Description
trusting_peer	PeerID		Identifier of the trusting peer
trust	Trust		Trust level

Message Trust

Trust level to a NeoFS network peer.

Field	Type	Label	Description
peer	PeerID		Identifier of the trusted peer
value	double		Trust level in [0:1] range

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