session-desktop/ts/session/messages/outgoing/controlMessage/group/v3/GroupPromoteMessage.ts

// import { SignalService } from '../../../../../../protobuf';
// import { isEmpty } from 'lodash';
// import { GroupMessage, GroupMessageParams } from './GroupMessage';
// import { from_hex } from 'libsodium-wrappers-sumo';

// export interface GroupPromoteMessageParams extends GroupMessageParams {
//   /**
//    * hex string of the group private key
//    */
//   privateKey: string;
// }

// export class GroupPromoteMessage extends GroupMessage {
//   private readonly privateKey: string;

//   constructor(params: GroupPromoteMessageParams) {
//     super(params);

//     if (!params.privateKey || isEmpty(params.privateKey)) {
//       throw new Error('privateKey parameter must be set');
//     }

//     this.privateKey = params.privateKey;
//   }

//   public dataProto(): SignalService.DataMessage {
//     const dataMessage = new SignalService.DataMessage();
//     dataMessage.groupMessage = super.groupMessage();
//     dataMessage.groupMessage.promoteMessage = new SignalService.GroupPromoteMessage();
//     dataMessage.groupMessage.promoteMessage.privateKey = from_hex(this.privateKey);

//     return dataMessage;
//   }
// }