/**
 * WeChat ChatId 编解码
 *
 * 格式: weixin::<accountId>::<peerUserId>
 * 确保每个 (账号, 对端用户) 对应唯一的会话标识
 */
/**
 * 编码 ChatId
 */
export declare function encodeWeixinChatId(accountId: string, peerUserId: string): string;
/**
 * 解码 ChatId
 */
export declare function decodeWeixinChatId(chatId: string): {
    accountId: string;
    peerUserId: string;
} | null;
/**
 * 判断是否为 Weixin ChatId
 */
export declare function isWeixinChatId(chatId: string): boolean;
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