export interface HttpClientConfig {
    baseUrl: string;
    apiKey: string;
}
/**
 * Cliente HTTP para a API Asaas v3.
 * Usa fetch nativo (Node 18+).
 */
export declare class HttpClient {
    private readonly config;
    constructor(config: HttpClientConfig);
    /** Monta a URL absoluta (baseUrl + path) e opcionalmente adiciona query params. */
    private buildUrl;
    private getHeaders;
    private handleResponse;
    get<T>(path: string, params?: Record<string, string | number | boolean | undefined>): Promise<T>;
    post<T>(path: string, body?: unknown): Promise<T>;
    put<T>(path: string, body?: unknown): Promise<T>;
    delete<T>(path: string): Promise<T>;
    /** POST com multipart/form-data (ex.: upload de arquivo). Não define Content-Type para fetch definir o boundary. */
    postMultipart<T>(path: string, formData: FormData): Promise<T>;
}
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