export declare class HttpClient {
    private baseUrl;
    private apiKey;
    constructor({ baseUrl, apiKey }: {
        baseUrl: string;
        apiKey: string;
    });
    get<T>(method: string): Promise<T | null>;
    post<T>(method: string, data: unknown): Promise<T | null>;
    put<T>(method: string, data: unknown): Promise<T | null>;
    private buildUrl;
    private get headers();
    private handleError;
    private handleApiError;
}
export declare class ApiRequestError extends Error {
    url: string;
    code: string;
    status: number;
    description: string;
    constructor(url: string, code: string, status: number, description: string);
}