import { ChatUnion, ErrorUnion } from '../outputs';
/**
 * Creates a new supergroup from an existing basic group and sends a corresponding messageChatUpgradeTo
 * and messageChatUpgradeFrom. Deactivates the original basic group
 * @param {Object} params
 * @param {number} [params.chatId] - Identifier of the chat to upgrade
 * @param {Object} state
 * @returns {ChatUnion | ErrorUnion}
 */
export declare type UpgradeBasicGroupChatToSupergroupChatMethod = <ResponseT = ChatUnion>(params: UpgradeBasicGroupChatToSupergroupChatParams, state?: Record<string, any>) => Promise<ResponseT | ErrorUnion>;
export interface UpgradeBasicGroupChatToSupergroupChatParams {
    /** Identifier of the chat to upgrade */
    chatId?: number;
}