/**
 * Lark 用户信息
 */
export interface LarkUser {
    email: string;
    openId?: string;
    userId?: string;
    unionId?: string;
    isDefault?: boolean;
    createdAt: Date;
    updatedAt: Date;
}
export declare const larkDbOperations: {
    saveUser: (data: {
        email: string;
        openId?: string;
        userId?: string;
        unionId?: string;
    }) => Promise<LarkUser>;
    getDefaultEmail: () => Promise<string | null>;
    getUserByEmail: (email: string) => Promise<LarkUser | null>;
    getAllUsers: () => Promise<LarkUser[]>;
    deleteUser: (email: string) => Promise<boolean>;
};
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