syntax = "proto3";

package neo.fs.v2.container;

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

import "acl/types.proto";
import "container/types.proto";
import "refs/types.proto";
import "session/types.proto";

// `ContainerService` provides API to interact with `Container` smart contract
// in NeoFS sidechain via other NeoFS nodes. All of those actions can be done
// equivalently by directly issuing transactions and RPC calls to sidechain
// nodes.
service ContainerService {
  // `Put` invokes `Container` smart contract's `Put` method and returns
  // response immediately. After a new block is issued in sidechain, request is
  // verified by Inner Ring nodes. After one more block in sidechain, container
  // is added into smart contract storage.
  //
  // Statuses:
  // - **OK** (0, SECTION_SUCCESS): \
  //   request to save the container has been sent to the sidechain;
  // - Common failures (SECTION_FAILURE_COMMON).
  rpc Put(PutRequest) returns (PutResponse);

  // `Delete` invokes `Container` smart contract's `Delete` method and returns
  // response immediately. After a new block is issued in sidechain, request is
  // verified by Inner Ring nodes. After one more block in sidechain, container
  // is added into smart contract storage.
  //
  // Statuses:
  // - **OK** (0, SECTION_SUCCESS): \
  //   request to remove the container has been sent to the sidechain;
  // - Common failures (SECTION_FAILURE_COMMON).
  rpc Delete(DeleteRequest) returns (DeleteResponse);

  // Returns container structure from `Container` smart contract storage.
  //
  // Statuses:
  // - **OK** (0, SECTION_SUCCESS): \
  //   container has been successfully read;
  // - Common failures (SECTION_FAILURE_COMMON);
  // - **CONTAINER_NOT_FOUND** (3072, SECTION_CONTAINER): \
  //   requested container not found.
  rpc Get(GetRequest) returns (GetResponse);

  // Returns all owner's containers from 'Container` smart contract' storage.
  //
  // Statuses:
  // - **OK** (0, SECTION_SUCCESS): \
  //   container list has been successfully read;
  // - Common failures (SECTION_FAILURE_COMMON).
  rpc List(ListRequest) returns (ListResponse);

  // Invokes 'SetEACL' method of 'Container` smart contract and returns response
  // immediately. After one more block in sidechain, Extended ACL changes are
  // added into smart contract storage.
  //
  // Statuses:
  // - **OK** (0, SECTION_SUCCESS): \
  //   request to save container eACL has been sent to the sidechain;
  // - Common failures (SECTION_FAILURE_COMMON).
  rpc SetExtendedACL(SetExtendedACLRequest) returns (SetExtendedACLResponse);

  // Returns Extended ACL table and signature from `Container` smart contract
  // storage.
  //
  // Statuses:
  // - **OK** (0, SECTION_SUCCESS): \
  //   container eACL has been successfully read;
  // - Common failures (SECTION_FAILURE_COMMON);
  // - **CONTAINER_NOT_FOUND** (3072, SECTION_CONTAINER): \
  //   container not found.
  rpc GetExtendedACL(GetExtendedACLRequest) returns (GetExtendedACLResponse);

  // Announce container used space values for P2P synchronization.
  //
  // Statuses:
  // - **OK** (0, SECTION_SUCCESS): \
  //   estimation of used space has been successfully announced;
  // - Common failures (SECTION_FAILURE_COMMON).
  rpc AnnounceUsedSpace(AnnounceUsedSpaceRequest) returns (AnnounceUsedSpaceResponse);
}

// New NeoFS Container creation request
message PutRequest {
  // Container creation request has container structure's signature as a
  // separate field. It's not stored in sidechain, just verified on container
  // creation by `Container` smart contract. `ContainerID` is a SHA256 hash of
  // the stable-marshalled container strucutre, hence there is no need for
  // additional signature checks.
  message Body {
    // Container structure to register in NeoFS
    container.Container container = 1;

    // Signature of a stable-marshalled container according to RFC-6979.
    // Signature scheme must be either UNSPECIFIED or ECDSA_RFC6979_SHA256.
    neo.fs.v2.refs.Signature signature =2;
  }
  // Body of container put 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;
}

// New NeoFS Container creation response
message PutResponse {
  // Container put response body contains information about the newly registered
  // container as seen by `Container` smart contract. `ContainerID` can be
  // calculated beforehand from the container structure and compared to the one
  // returned here to make sure everything was done as expected.
  message Body {
    // Unique identifier of the newly created container
    neo.fs.v2.refs.ContainerID container_id = 1;
  }
  // Body of container put 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;
}

// Container removal request
message DeleteRequest {
  // Container removal request body has a signed `ContainerID` as a proof of
  // container owner's intent. The signature will be verified by `Container`
  // smart contract, so signing algorithm must be supported by NeoVM.
  message Body {
    // Identifier of the container to delete from NeoFS
    neo.fs.v2.refs.ContainerID container_id = 1;

    // `ContainerID` signed with the container owner's key according to RFC-6979.
    // Signature scheme must be either UNSPECIFIED or ECDSA_RFC6979_SHA256.
    neo.fs.v2.refs.Signature signature = 2;
  }
  // Body of container delete 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;
}

// `DeleteResponse` has an empty body because delete operation is asynchronous
// and done via consensus in Inner Ring nodes.
message DeleteResponse {
  // `DeleteResponse` has an empty body because delete operation is asynchronous
  // and done via consensus in Inner Ring nodes.
  message Body {}
  // Body of container delete 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;
}

// Get container structure
message GetRequest {
  // Get container structure request body.
  message Body {
    // Identifier of the container to get
    neo.fs.v2.refs.ContainerID container_id = 1;
  }
  // Body of container get 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;
}

// Get container structure
message GetResponse {
  // Get container response body does not have container structure signature. It
  // was already verified on container creation.
  message Body {
    // Requested container structure
    Container container = 1;

    // Signature of a stable-marshalled container according to RFC-6979.
    // Signature scheme must be either UNSPECIFIED or ECDSA_RFC6979_SHA256.
    neo.fs.v2.refs.Signature signature = 2;

    // Session token if the container was created within a session
    neo.fs.v2.session.SessionToken session_token = 3;
  }
  // Body of container get 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;
}

// List containers
message ListRequest {
  // List containers request body.
  message Body {
    // Identifier of the container owner
    neo.fs.v2.refs.OwnerID owner_id = 1;
  }
  // Body of list containers 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;
}

// List containers
message ListResponse {
  // List containers response body.
  message Body {
    // List of `ContainerID`s belonging to the requested `OwnerID`
    repeated refs.ContainerID container_ids = 1;
  }

  // Body of list containers 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;
}

// Set Extended ACL
message SetExtendedACLRequest {
  // Set Extended ACL request body does not have separate `ContainerID`
  // reference. It will be taken from `EACLTable.container_id` field.
  message Body {
    // Extended ACL table to set for container
    neo.fs.v2.acl.EACLTable eacl = 1;

    // Signature of stable-marshalled Extended ACL table according to RFC-6979.
    // Signature scheme must be either UNSPECIFIED or ECDSA_RFC6979_SHA256.
    neo.fs.v2.refs.Signature signature = 2;
  }
  // Body of set extended acl 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;
}

// Set Extended ACL
message SetExtendedACLResponse {
  // `SetExtendedACLResponse` has an empty body because the operation is
  // asynchronous and update should be reflected in `Container` smart contract's
  // storage after next block is issued in sidechain.
  message Body { }

  // Body of set extended acl 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;
}

// Get Extended ACL
message GetExtendedACLRequest {
  // Get Extended ACL request body
  message Body {
    // Identifier of the container having Extended ACL
    neo.fs.v2.refs.ContainerID container_id = 1;
  }

  // Body of get extended acl 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;
}

// Get Extended ACL
message GetExtendedACLResponse {
  // Get Extended ACL Response body can be empty if the requested container did
  // not have Extended ACL Table attached or Extended ACL was not allowed at
  // container creation.
  message Body {
    // Extended ACL requested, if available
    neo.fs.v2.acl.EACLTable eacl = 1;

    // Signature of stable-marshalled Extended ACL according to RFC-6979.
    // Signature scheme must be either UNSPECIFIED or ECDSA_RFC6979_SHA256.
    neo.fs.v2.refs.Signature signature = 2;

    // Session token if Extended ACL was set within a session
    neo.fs.v2.session.SessionToken session_token = 3;
  }
  // Body of get extended acl 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;
}

// Announce container used space
message AnnounceUsedSpaceRequest {
  // Container used space announcement body.
  message Body {
    // Announcement contains used space information about single container.
    message Announcement {
      // Epoch number for which container size estimation was produced.
      uint64 epoch = 1;

      // Identifier of the container.
      neo.fs.v2.refs.ContainerID container_id = 2;

      // Used space is a sum of object payload sizes of specified
      // container, stored in the node. It must not include inhumed objects.
      uint64 used_space = 3;
    }

    // List of announcements. If nodes share several containers, then
    // announcements transferred in a batch.
    repeated Announcement announcements = 1;
  }

  // Body of announce used space 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;
}

// Announce container used space
message AnnounceUsedSpaceResponse {
  // `AnnounceUsedSpaceResponse` has an empty body because announcements are
  // one way communication.
  message Body { }

  // Body of announce used space 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;
}