/**
 * Abstract base for store API clients.
 *
 * Extracts common HTTP helpers shared by GooglePlayClient, HuaweiAppGalleryClient,
 * and RuStoreClient. Each subclass provides its own auth header via `authHeader()`.
 */
export declare abstract class AbstractStoreClient {
    /**
     * Returns the HTTP header used for authentication.
     * Override to customize (e.g. "Public-Token" for RuStore vs "Authorization" for Google/Huawei).
     */
    protected authHeader(token: string): Record<string, string>;
    /**
     * Generic JSON API call with error handling.
     * Subclasses that need a different error prefix can override `apiErrorPrefix`.
     */
    protected api<T>(method: string, url: string, token: string, body?: unknown): Promise<T>;
    /** Prefix for API error messages (e.g. "Google Play API", "Huawei API"). */
    protected abstract get apiErrorPrefix(): string;
    /**
     * Reads a ReadableStream into a single Buffer.
     * Used by Huawei and RuStore for multipart file uploads.
     */
    protected streamToBuffer(stream: ReadableStream<Uint8Array>): Promise<Buffer>;
}
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