syntax = "proto3";

package cobalt.observation_store;

import "src/pb/encrypted_message.proto";
import "src/pb/observation.proto";
import "src/pb/observation_batch.proto";

// A StoredObservationBatch is similar to an ObservationBatch except that the observations it
// contains may or may not be encrypted. It is used internally by ObservationStore.
message StoredObservationBatch {
  ObservationMetadata meta_data = 1;
  repeated StoredObservation observation = 2;
}

// A StoredObservation contains data about one observation that is stored in an ObservationStore.
message StoredObservation {
  oneof observation {
    EncryptedMessage encrypted = 1;
    Observation unencrypted = 2;
  }
  bytes contribution_id = 3;
}

// FileObservationStoreRecord is used internally by FileObservationStore for serializing protos into
// files. It allows writing either a meta_data or an encrypted_observation so they can later be
// reconstructed into an Envelope.
message FileObservationStoreRecord {
  oneof contents {
    ObservationMetadata meta_data = 1;
    EncryptedMessage encrypted_observation = 2;
    Observation unencrypted_observation = 3;
  }
  bytes contribution_id = 4;
}