syntax = "proto3";
package object;
option go_package = "github.com/nspcc-dev/neofs-proto/object";

import "refs/types.proto";
import "object/types.proto";
import "session/types.proto";
import "github.com/gogo/protobuf/gogoproto/gogo.proto";

option (gogoproto.stable_marshaler_all) = true;

// Object service provides API for manipulating with the object.
service Service {

    // Get the object from container. Response uses gRPC stream. First response
    // message carry object of requested address. Chunk messages are parts of
    // the object's payload if it is needed. All messages except first carry
    // chunks. Requested object can be restored by concatenation of object
    // message payload and all chunks keeping receiving order.
    rpc Get(GetRequest) returns (stream GetResponse);

    // Put the object into container. Request uses gRPC stream. First message
    // SHOULD BE type of PutHeader. Container id and Owner id of object SHOULD
    // BE set. Session token SHOULD BE obtained before put operation (see
    // session package). Chunk messages considered by server as part of object
    // payload. All messages except first SHOULD BE chunks. Chunk messages
    // SHOULD BE sent in direct order of fragmentation.
    rpc Put(stream PutRequest) returns (PutResponse);

    // Delete the object from a container
    rpc Delete(DeleteRequest) returns (DeleteResponse);

    // Head returns the object without data payload. Object in the
    // response has system header only. If full headers flag is set, extended
    // headers are also present.
    rpc Head(HeadRequest) returns (HeadResponse);

    // Search objects in container. Version of query language format SHOULD BE
    // set to 1. Search query represented in serialized format (see query
    // package).
    rpc Search(SearchRequest) returns (SearchResponse);

    // GetRange of data payload. Ranges are set of pairs (offset, length).
    // Fragments order in response corresponds to ranges order in request.
    rpc GetRange(GetRangeRequest) returns (GetRangeResponse);

    // GetRangeHash returns homomorphic hash of object payload range after XOR
    // operation. Ranges are set of pairs (offset, length). Hashes order in
    // response corresponds to ranges order in request. Homomorphic hash is
    // calculated for XORed data.
    rpc GetRangeHash(GetRangeHashRequest) returns (GetRangeHashResponse);
}

message GetRequest {
    uint64 Epoch         = 1; // Epoch is set by user to 0, node set epoch to the actual value
    refs.Address Address = 2 [(gogoproto.nullable) = false]; // Address of object (container id + object id)
    uint32 TTL           = 3; // TTL must be larger than zero, it decreased in every neofs-node
}

message GetResponse {
    oneof R {
        Object object = 1; // Object header and some payload
        bytes Chunk   = 2; // Chunk of remaining payload
    }
}

message PutRequest {
    message PutHeader {
        uint64 Epoch        = 1; // Epoch is set by user to 0, node set epoch to the actual value
        Object Object       = 2; // Object with at least container id and owner id fields
        uint32 TTL          = 3; // TTL must be larger than zero, it decreased in every neofs-node
        session.Token Token = 4; // Token with session public key and user's signature
    }

    oneof R {
        PutHeader Header = 1; // Header should be the first message in the stream
        bytes Chunk      = 2; // Chunk should be a remaining message in stream should be chunks
    }
}

message PutResponse {
    refs.Address Address = 1 [(gogoproto.nullable) = false]; // Address of object (container id + object id)
}
message DeleteRequest {
    uint64 Epoch         = 1; // Epoch is set by user to 0, node set epoch to the actual value
    refs.Address Address = 2 [(gogoproto.nullable) = false]; // Address of object (container id + object id)
    bytes OwnerID        = 3 [(gogoproto.nullable) = false, (gogoproto.customtype) = "OwnerID"]; // OwnerID is a wallet address
    uint32 TTL           = 4; // TTL must be larger than zero, it decreased in every neofs-node
    session.Token Token  = 5; // Token with session public key and user's signature
}

// DeleteResponse is empty because we cannot guarantee permanent object removal
// in distributed system.
message DeleteResponse {}

message HeadRequest {
    uint64 Epoch         = 1; // Epoch is set by user to 0, node set epoch to the actual value
    refs.Address Address = 2 [(gogoproto.nullable) = false, (gogoproto.customtype) = "Address"]; // Address of object (container id + object id)
    bool FullHeaders     = 3; // FullHeaders can be set true for extended headers in the object
    uint32 TTL           = 4; // TTL must be larger than zero, it decreased in every neofs-node
}
message HeadResponse {
    Object Object = 1; // Object without payload
}

message SearchRequest {
    uint64 Epoch         = 1; // Epoch is set by user to 0, node set epoch to the actual value
    uint32 Version       = 2; // Version of search query format
    bytes ContainerID    = 3 [(gogoproto.nullable) = false, (gogoproto.customtype) = "CID"]; // ContainerID for searching the object
    bytes Query          = 4; // Query in the binary serialized format
    uint32 TTL           = 5; // TTL must be larger than zero, it decreased in every neofs-node
}

message SearchResponse {
    repeated refs.Address Addresses = 1 [(gogoproto.nullable) = false]; // Addresses of found objects
}

message GetRangeRequest {
    uint64 Epoch          = 1; // Epoch is set by user to 0, node set epoch to the actual value
    refs.Address Address  = 2 [(gogoproto.nullable) = false]; // Address of object (container id + object id)
    repeated Range Ranges = 3 [(gogoproto.nullable) = false]; // Ranges of object's payload to return
    uint32 TTL            = 4; // TTL must be larger than zero, it decreased in every neofs-node
}

message GetRangeResponse {
    repeated bytes Fragments = 1; // Fragments of object's payload
}

message GetRangeHashRequest {
    uint64 Epoch          = 1; // Epoch is set by user to 0, node set epoch to the actual value
    refs.Address Address  = 2 [(gogoproto.nullable) = false]; // Address of object (container id + object id)
    repeated Range Ranges = 3 [(gogoproto.nullable) = false]; // Ranges of object's payload to calculate homomorphic hash
    bytes Salt            = 4; // Salt is used to XOR object's payload ranges before hashing, it can be nil
    uint32 TTL            = 5; // TTL must be larger than zero, it decreased in every neofs-node
}

message GetRangeHashResponse {
    repeated bytes Hashes = 1 [(gogoproto.customtype) = "Hash", (gogoproto.nullable) = false]; // Homomorphic hashes of all ranges
}