syntax = "proto3";

package frost.fs.tombstone;

import "refs/types.proto";

// Tombstone keeps record of deleted objects for a few epochs until they are
// purged from the FrostFS network.
message Tombstone {
  // Last FrostFS epoch number of the tombstone lifetime. It's set by the
  // tombstone creator depending on the current FrostFS network settings. A
  // tombstone object must have the same expiration epoch value in
  // `__SYSTEM__EXPIRATION_EPOCH`
  // attribute. Otherwise, the tombstone will be rejected by a storage node.
  uint64 expiration_epoch = 1 [ json_name = "expirationEpoch" ];

  // 16 byte UUID used to identify the split object hierarchy parts. Must be
  // unique inside a container. All objects participating in the split must
  // have the same `split_id` value.
  bytes split_id = 2 [ json_name = "splitID" ];

  // List of objects to be deleted.
  repeated frost.fs.refs.ObjectID members = 3 [ json_name = "members" ];
}