/**
 * Signal pairing service — manages device linking via QR code.
 *
 * Mirrors whatsapp-pairing.ts but uses @miladyai/signal-native instead of
 * Baileys. Signal linking produces a single provisioning URL (not a refresh
 * loop) — if it times out, restart the session.
 */
/** Validate accountId to prevent path traversal. */
export declare function sanitizeAccountId(raw: string): string;
export type SignalPairingStatus = "idle" | "initializing" | "waiting_for_qr" | "connected" | "disconnected" | "timeout" | "error";
export interface SignalPairingEvent {
    type: "signal-qr" | "signal-status";
    accountId: string;
    qrDataUrl?: string;
    status?: SignalPairingStatus;
    uuid?: string;
    phoneNumber?: string;
    error?: string;
}
export interface SignalPairingOptions {
    authDir: string;
    accountId: string;
    onEvent: (event: SignalPairingEvent) => void;
}
export declare class SignalPairingSession {
    private status;
    private options;
    private aborted;
    constructor(options: SignalPairingOptions);
    start(): Promise<void>;
    stop(): void;
    getStatus(): SignalPairingStatus;
    private setStatus;
}
export declare function signalAuthExists(workspaceDir: string, accountId?: string): boolean;
export declare function signalLogout(workspaceDir: string, accountId?: string): void;
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