syntax = "proto3";

package neo.fs.v2.reputation;

option go_package = "github.com/nspcc-dev/neofs-api-go/v2/reputation/grpc;reputation";
option csharp_namespace = "Neo.FileStorage.API.Reputation";

import "reputation/types.proto";
import "session/types.proto";

// `ReputationService` provides mechanisms for exchanging
// trust values within NeoFS Reputation system .
service ReputationService {
    // Sends local client trust to any peer from NeoFS network.
    rpc SendLocalTrust (SendLocalTrustRequest) returns (SendLocalTrustResponse);

    // Sends the intermediate result of the iterative algorithm
    // for calculating the global reputation of the node.
    rpc SendIntermediateResult (SendIntermediateResultRequest) returns (SendIntermediateResultResponse);
}

// Request to send local trust.
message SendLocalTrustRequest {
    // Request body structure.
    message Body {
        // The number of the epoch in which the trust was assessed.
        uint64 epoch = 1;

        // List of normalized local trust values of the client to the NeoFS peers.
        // The value is calculated according to EigenTrust++ algorithm
        // and must be in the range [0;1].
        repeated Trust trusts = 2;
    }

    // Body of the request message.
    Body body = 1;

    // Carries request meta information. Header data is used only to regulate
    // message transport and does not affect request execution.
    neo.fs.v2.session.RequestMetaHeader meta_header = 2;

    // Carries request verification information. This header is used to
    // authenticate the nodes of the message route and check the correctness of
    // transmission.
    neo.fs.v2.session.RequestVerificationHeader verify_header = 3;
}

// Response to request to send local trust.
message SendLocalTrustResponse {
    // Response body structure.
    message Body {
    }

    // Body of the response message.
    Body body = 1;

    // Carries response meta information. Header data is used only to regulate
    // message transport and does not affect request execution.
    neo.fs.v2.session.ResponseMetaHeader meta_header = 2;

    // Carries response verification information. This header is used to
    // authenticate the nodes of the message route and check the correctness of
    // transmission.
    neo.fs.v2.session.ResponseVerificationHeader verify_header = 3;
}

// Request to send intermediate global trust.
message SendIntermediateResultRequest {
    // Request body structure.
    message Body {
        // The number of the epoch in which the iteration was executed.
        uint64 epoch = 1;

        // Sequence number of the iteration.
        uint32 iteration = 2;

        // Current global trust value computed at the specified iteration.
        PeerToPeerTrust trust = 3;
    }

    // Body of the request message.
    Body body = 1;

    // Carries request meta information. Header data is used only to regulate
    // message transport and does not affect request execution.
    neo.fs.v2.session.RequestMetaHeader meta_header = 2;

    // Carries request verification information. This header is used to
    // authenticate the nodes of the message route and check the correctness of
    // transmission.
    neo.fs.v2.session.RequestVerificationHeader verify_header = 3;
}

// Response to request to send intermediate global trust.
message SendIntermediateResultResponse {
    // Response body structure.
    message Body {
    }

    // Body of the response message.
    Body body = 1;

    // Carries response meta information. Header data is used only to regulate
    // message transport and does not affect request execution.
    neo.fs.v2.session.ResponseMetaHeader meta_header = 2;

    // Carries response verification information. This header is used to
    // authenticate the nodes of the message route and check the correctness of
    // transmission.
    neo.fs.v2.session.ResponseVerificationHeader verify_header = 3;
}