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+# Protocol Documentation
+<a name="top"></a>
+
+## Table of Contents
+
+- [reputation/service.proto](#reputation/service.proto)
+ - Services
+    - [ReputationService](#neo.fs.v2.reputation.ReputationService)
+    
+  - Messages
+    - [AnnounceIntermediateResultRequest](#neo.fs.v2.reputation.AnnounceIntermediateResultRequest)
+    - [AnnounceIntermediateResultRequest.Body](#neo.fs.v2.reputation.AnnounceIntermediateResultRequest.Body)
+    - [AnnounceIntermediateResultResponse](#neo.fs.v2.reputation.AnnounceIntermediateResultResponse)
+    - [AnnounceIntermediateResultResponse.Body](#neo.fs.v2.reputation.AnnounceIntermediateResultResponse.Body)
+    - [AnnounceLocalTrustRequest](#neo.fs.v2.reputation.AnnounceLocalTrustRequest)
+    - [AnnounceLocalTrustRequest.Body](#neo.fs.v2.reputation.AnnounceLocalTrustRequest.Body)
+    - [AnnounceLocalTrustResponse](#neo.fs.v2.reputation.AnnounceLocalTrustResponse)
+    - [AnnounceLocalTrustResponse.Body](#neo.fs.v2.reputation.AnnounceLocalTrustResponse.Body)
+    
+
+- [reputation/types.proto](#reputation/types.proto)
+
+  - Messages
+    - [GlobalTrust](#neo.fs.v2.reputation.GlobalTrust)
+    - [GlobalTrust.Body](#neo.fs.v2.reputation.GlobalTrust.Body)
+    - [PeerID](#neo.fs.v2.reputation.PeerID)
+    - [PeerToPeerTrust](#neo.fs.v2.reputation.PeerToPeerTrust)
+    - [Trust](#neo.fs.v2.reputation.Trust)
+    
+
+- [Scalar Value Types](#scalar-value-types)
+
+
+
+<a name="reputation/service.proto"></a>
+<p align="right"><a href="#top">Top</a></p>
+
+## reputation/service.proto
+
+
+
+
+<a name="neo.fs.v2.reputation.ReputationService"></a>
+
+### 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.
+
+| Name | Input | Output |
+| ---- | ----- | ------ |
+| AnnounceLocalTrust | [AnnounceLocalTrustRequest](#neo.fs.v2.reputation.AnnounceLocalTrustRequest) | [AnnounceLocalTrustResponse](#neo.fs.v2.reputation.AnnounceLocalTrustResponse) |
+#### Method AnnounceIntermediateResult
+
+Announces the intermediate result of the iterative algorithm for
+calculating the global reputation of the node in NeoFS network.
+
+| Name | Input | Output |
+| ---- | ----- | ------ |
+| AnnounceIntermediateResult | [AnnounceIntermediateResultRequest](#neo.fs.v2.reputation.AnnounceIntermediateResultRequest) | [AnnounceIntermediateResultResponse](#neo.fs.v2.reputation.AnnounceIntermediateResultResponse) |
+ <!-- end services -->
+
+
+<a name="neo.fs.v2.reputation.AnnounceIntermediateResultRequest"></a>
+
+### Message AnnounceIntermediateResultRequest
+Announce intermediate global trust information.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| body | [AnnounceIntermediateResultRequest.Body](#neo.fs.v2.reputation.AnnounceIntermediateResultRequest.Body) |  | Body of the request message. |
+| meta_header | [neo.fs.v2.session.RequestMetaHeader](#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](#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. |
+
+
+<a name="neo.fs.v2.reputation.AnnounceIntermediateResultRequest.Body"></a>
+
+### Message AnnounceIntermediateResultRequest.Body
+Announce intermediate global trust information.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| epoch | [uint64](#uint64) |  | Iteration execution Epoch number |
+| iteration | [uint32](#uint32) |  | Iteration sequence number |
+| trust | [PeerToPeerTrust](#neo.fs.v2.reputation.PeerToPeerTrust) |  | Current global trust value calculated at the specified iteration |
+
+
+<a name="neo.fs.v2.reputation.AnnounceIntermediateResultResponse"></a>
+
+### Message AnnounceIntermediateResultResponse
+Intermediate global trust information announce response.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| body | [AnnounceIntermediateResultResponse.Body](#neo.fs.v2.reputation.AnnounceIntermediateResultResponse.Body) |  | Body of the response message. |
+| meta_header | [neo.fs.v2.session.ResponseMetaHeader](#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](#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. |
+
+
+<a name="neo.fs.v2.reputation.AnnounceIntermediateResultResponse.Body"></a>
+
+### 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.
+
+
+
+<a name="neo.fs.v2.reputation.AnnounceLocalTrustRequest"></a>
+
+### Message AnnounceLocalTrustRequest
+Announce node's local trust information.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| body | [AnnounceLocalTrustRequest.Body](#neo.fs.v2.reputation.AnnounceLocalTrustRequest.Body) |  | Body of the request message. |
+| meta_header | [neo.fs.v2.session.RequestMetaHeader](#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](#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. |
+
+
+<a name="neo.fs.v2.reputation.AnnounceLocalTrustRequest.Body"></a>
+
+### Message AnnounceLocalTrustRequest.Body
+Announce node's local trust information.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| epoch | [uint64](#uint64) |  | Trust assessment Epoch number |
+| trusts | [Trust](#neo.fs.v2.reputation.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. |
+
+
+<a name="neo.fs.v2.reputation.AnnounceLocalTrustResponse"></a>
+
+### Message AnnounceLocalTrustResponse
+Node's local trust information announce response.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| body | [AnnounceLocalTrustResponse.Body](#neo.fs.v2.reputation.AnnounceLocalTrustResponse.Body) |  | Body of the response message. |
+| meta_header | [neo.fs.v2.session.ResponseMetaHeader](#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](#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. |
+
+
+<a name="neo.fs.v2.reputation.AnnounceLocalTrustResponse.Body"></a>
+
+### 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.
+
+
+ <!-- end messages -->
+
+ <!-- end enums -->
+
+
+
+<a name="reputation/types.proto"></a>
+<p align="right"><a href="#top">Top</a></p>
+
+## reputation/types.proto
+
+
+ <!-- end services -->
+
+
+<a name="neo.fs.v2.reputation.GlobalTrust"></a>
+
+### Message GlobalTrust
+Global trust level to NeoFS node.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| version | [neo.fs.v2.refs.Version](#neo.fs.v2.refs.Version) |  | Message format version. Effectively the version of API library used to create the message. |
+| body | [GlobalTrust.Body](#neo.fs.v2.reputation.GlobalTrust.Body) |  | Message body |
+| signature | [neo.fs.v2.refs.Signature](#neo.fs.v2.refs.Signature) |  | Signature of the binary `body` field by the manager. |
+
+
+<a name="neo.fs.v2.reputation.GlobalTrust.Body"></a>
+
+### Message GlobalTrust.Body
+Message body structure.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| manager | [PeerID](#neo.fs.v2.reputation.PeerID) |  | Node manager ID |
+| trust | [Trust](#neo.fs.v2.reputation.Trust) |  | Global trust level |
+
+
+<a name="neo.fs.v2.reputation.PeerID"></a>
+
+### 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](https://tools.ietf.org/html/draft-msporny-base58-02) encoded string.
+
+JSON value will be the data encoded as a string using standard base64
+encoding with paddings. Either
+[standard](https://tools.ietf.org/html/rfc4648#section-4) or
+[URL-safe](https://tools.ietf.org/html/rfc4648#section-5) base64 encoding
+with/without paddings are accepted.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| public_key | [bytes](#bytes) |  | Peer node's public key |
+
+
+<a name="neo.fs.v2.reputation.PeerToPeerTrust"></a>
+
+### Message PeerToPeerTrust
+Trust level of a peer to a peer.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| trusting_peer | [PeerID](#neo.fs.v2.reputation.PeerID) |  | Identifier of the trusting peer |
+| trust | [Trust](#neo.fs.v2.reputation.Trust) |  | Trust level |
+
+
+<a name="neo.fs.v2.reputation.Trust"></a>
+
+### Message Trust
+Trust level to a NeoFS network peer.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| peer | [PeerID](#neo.fs.v2.reputation.PeerID) |  | Identifier of the trusted peer |
+| value | [double](#double) |  | Trust level in [0:1] range |
+
+ <!-- end messages -->
+
+ <!-- end enums -->
+
+
+
+## Scalar Value Types
+
+| .proto Type | Notes | C++ Type | Java Type | Python Type |
+| ----------- | ----- | -------- | --------- | ----------- |
+| <a name="double" /> double |  | double | double | float |
+| <a name="float" /> float |  | float | float | float |
+| <a name="int32" /> 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 |
+| <a name="int64" /> 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 |
+| <a name="uint32" /> uint32 | Uses variable-length encoding. | uint32 | int | int/long |
+| <a name="uint64" /> uint64 | Uses variable-length encoding. | uint64 | long | int/long |
+| <a name="sint32" /> sint32 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s. | int32 | int | int |
+| <a name="sint64" /> sint64 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s. | int64 | long | int/long |
+| <a name="fixed32" /> fixed32 | Always four bytes. More efficient than uint32 if values are often greater than 2^28. | uint32 | int | int |
+| <a name="fixed64" /> fixed64 | Always eight bytes. More efficient than uint64 if values are often greater than 2^56. | uint64 | long | int/long |
+| <a name="sfixed32" /> sfixed32 | Always four bytes. | int32 | int | int |
+| <a name="sfixed64" /> sfixed64 | Always eight bytes. | int64 | long | int/long |
+| <a name="bool" /> bool |  | bool | boolean | boolean |
+| <a name="string" /> string | A string must always contain UTF-8 encoded or 7-bit ASCII text. | string | String | str/unicode |
+| <a name="bytes" /> bytes | May contain any arbitrary sequence of bytes. | string | ByteString | str |
+