syntax = "proto3";

package neo.fs.v2.refs;

option go_package = "github.com/nspcc-dev/neofs-api-go/v2/refs/grpc;refs";
option csharp_namespace = "NeoFS.API.v2.Refs";

// Object in NeoFS can be addressed by it's ContainerID and ObjectID. In string
// format there MUST be a '/' delimeter between them.
message Address {
  // Container identifier
  ContainerID container_id = 1;
  // Object identifier
  ObjectID object_id = 2;
}

// NeoFS Object unique identifier. Objects are immutable and content-addressed.
// It means `ObjectID` will change if `header` or `payload` changes. `ObjectID`
// is calculated as a hash of `header` field, which contains hash of object's
// payload.
message ObjectID {
  // Object identifier in a binary format
  bytes value = 1;
}

// NeoFS container identifier. Container structures are immutable and
// content-addressed. `ContainerID` is a 32 byte long SHA256 hash of
// stable-marshalled container message.
message ContainerID {
  // Container identifier in a binary format.
  bytes value = 1;
}

// OwnerID is a derivative of a user's main public key. The transformation
// algorithm is the same as for Neo3 wallet addresses. Neo3 wallet address can
// be directly used as `OwnerID`.
message OwnerID {
  // Identifier of the container owner in a binary format
  bytes value = 1;
}

// API version used by a node.
message Version {
  // Major API version
  uint32 major = 1;

  // Minor API version
  uint32 minor = 2;
}

// Signature of something in NeoFS.
message Signature {
  // Public key used for signing
  bytes key = 1;
  // Signature
  bytes sign = 2;
}

// Checksum algorithm type.
enum ChecksumType {
  // Unknown. Not used
  CHECKSUM_TYPE_UNSPECIFIED = 0;

  // Tillich-Zemor homomorphic hash function
  TZ = 1;

  // SHA-256
  SHA256 = 2;
}

// Checksum message.
message Checksum {
  // Checksum algorithm type
  ChecksumType type = 1;

  // Checksum itself
  bytes sum = 2;
}