/**
 * 钉钉 ChatId 编解码
 *
 * ChatId 格式: dingtalk::<accountId>::<conversationId>
 * - 单聊: dingtalk::default::userStaffId
 * - 群聊: dingtalk::default::cidXXX
 */
/**
 * 编码钉钉 ChatId
 */
export declare function encodeDingtalkChatId(accountId: string, conversationId: string): string;
/**
 * 解码钉钉 ChatId
 */
export declare function decodeDingtalkChatId(chatId: string): {
    accountId: string;
    conversationId: string;
} | null;
/**
 * 判断是否为群聊（以 cid 开头）
 */
export declare function isDingtalkGroupChat(conversationId: string): boolean;
/**
 * 从原始消息构建 conversationId
 * - 单聊：使用 senderStaffId 或 senderId
 * - 群聊：使用 conversationId
 */
export declare function buildDingtalkConversationId(rawMsg: {
    conversationType: string;
    conversationId: string;
    senderStaffId?: string;
    senderId?: string;
}): string;
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