/**
 * Copyright 2013 Signal Messenger, LLC
 * SPDX-License-Identifier: AGPL-3.0-only
 */
syntax = "proto2";

package textsecure;

option java_package = "org.whispersystems.textsecuregcm.entities";
option java_outer_classname = "MessageProtos";

message Envelope {
  enum Type {
    reserved 2, 7;

    UNKNOWN = 0;
    CIPHERTEXT = 1;
    PREKEY_BUNDLE = 3;
    SERVER_DELIVERY_RECEIPT = 5;
    UNIDENTIFIED_SENDER = 6;
    PLAINTEXT_CONTENT = 8;  // for decryption error receipts
  }

  optional Type type = 1;
  optional string source_service_id = 11;
  optional uint32 source_device = 7;
  optional uint64 client_timestamp = 5;
  optional bytes content = 8; // Contains an encrypted Content
  optional string server_guid = 9;
  optional uint64 server_timestamp = 10;
  optional bool ephemeral = 12; // indicates that the message should not be persisted if the recipient is offline
  optional string destination_service_id = 13;
  optional bool urgent = 14 [default=true];
  optional string updated_pni = 15;
  optional bool story = 16; // indicates that the content is a story.
  optional bytes report_spam_token = 17; // token sent when reporting spam
  optional bytes shared_mrm_key = 18; // indicates content should be fetched from multi-recipient message datastore
  optional bytes source_service_id_binary = 19; // service ID binary (i.e. 16 byte UUID for ACI, 1 byte prefix + 16 byte UUID for PNI)
  optional bytes destination_service_id_binary = 20; // service ID binary (i.e. 16 byte UUID for ACI, 1 byte prefix + 16 byte UUID for PNI)
  optional bytes server_guid_binary = 21; // 16-byte UUID
  optional bytes updated_pni_binary = 22; // 16-byte UUID
  // next: 22
}

message ProvisioningAddress {
  optional string address = 1;
}

message ServerCertificate {
  message Certificate {
    optional uint32 id = 1;
    optional bytes key = 2;
  }

  optional bytes certificate = 1;
  optional bytes signature = 2;
}

message SenderCertificate {
  message Certificate {
    optional string sender = 1;
    optional string sender_uuid = 6;
    optional uint32 sender_device = 2;
    optional fixed64 expires = 3;
    optional bytes identity_key = 4;
    optional ServerCertificate signer = 5;
  }

  optional bytes certificate = 1;
  optional bytes signature = 2;
}