export declare function readEnvVarFromFile(filePath: string, key: string): string | undefined;
export interface CheckTokenResult {
    set: boolean;
    valid: boolean;
    username?: string;
    botId?: number;
    reason?: string;
}
export declare function checkTokenFromFile(filePath: string): Promise<CheckTokenResult>;
export interface DiscoverChatResult {
    found: boolean;
    chats: DiscoveredChat[];
    reason?: string;
}
export declare function discoverChatFromFile(filePath: string, opts?: {
    timeoutSec?: number;
}): Promise<DiscoverChatResult>;
export interface BotIdentity {
    id: number;
    username?: string;
    firstName: string;
}
export declare function validateBotToken(token: string): Promise<BotIdentity | null>;
interface UpdateEntry {
    message?: {
        chat?: {
            id?: number;
            type?: string;
            username?: string;
            first_name?: string;
        };
    };
    edited_message?: {
        chat?: {
            id?: number;
            type?: string;
            username?: string;
            first_name?: string;
        };
    };
}
export interface DiscoveredChat {
    chatId: number;
    type: string;
    username?: string;
    firstName?: string;
}
export declare function findChatIdInUpdates(updates: UpdateEntry[]): DiscoveredChat[];
export declare function fetchUpdates(token: string): Promise<UpdateEntry[]>;
export declare function pollForChats(token: string, opts?: {
    maxAttempts?: number;
    intervalMs?: number;
}): Promise<DiscoveredChat[]>;
export declare function runTelegramSetup(): Promise<{
    envPath: string;
    bot: BotIdentity;
    chatId: number;
}>;
export {};