/**
 * Minimal WhatsApp Cloud API client (fetch-based, zero deps). The OFFICIAL
 * Meta business path (not Baileys/QR) — REST out, webhook in — which is the
 * clean, scalable, fully-testable choice for a business line.
 */
export interface WhatsAppApiOptions {
    readonly accessToken: string;
    /** The WhatsApp Business phone-number id (from Meta), not the display number. */
    readonly phoneNumberId: string;
    readonly fetch?: typeof fetch;
    readonly baseUrl?: string;
    readonly apiVersion?: string;
}
export declare class WhatsAppSendError extends Error {
    readonly acceptance: 'rejected' | 'unknown';
    readonly code: string;
    constructor(message: string, acceptance: 'rejected' | 'unknown', code: string);
}
export declare class WhatsAppApi {
    private readonly base;
    private readonly token;
    private readonly doFetch;
    constructor(opts: WhatsAppApiOptions);
    sendText(to: string, body: string): Promise<{
        id: string;
    }>;
}
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