/**
 * HTTP client for making authenticated requests to the Renegade relayer API.
 * This client handles request signing and authentication using HMAC-SHA256.
 */
export declare const RENEGADE_HEADER_PREFIX = "x-renegade";
export declare const RENEGADE_AUTH_HEADER = "x-renegade-auth";
export declare const RENEGADE_AUTH_EXPIRATION_HEADER = "x-renegade-auth-expiration";
/**
 * Stringify object that may contain BigInt values
 */
export declare const stringifyBody: (data: any) => string;
export interface HttpResponse<T = any> {
    data: T;
    status: number;
    statusText: string;
    headers: Record<string, string>;
}
/**
 * HTTP client for making authenticated requests to the Renegade relayer API.
 */
export declare class RelayerHttpClient {
    private baseUrl;
    private authKey?;
    private defaultHeaders;
    /**
     * Initialize a new RelayerHttpClient.
     *
     * @param baseUrl The base URL of the relayer API
     * @param authKey The base64-encoded authentication key for request signing
     */
    constructor(baseUrl: string, authKey?: string);
    /**
     * Make a GET request with custom headers.
     *
     * @param path The API endpoint path
     * @param headers Additional headers to include
     * @returns The API response
     */
    get<T>(path: string, headers?: Record<string, string>): Promise<HttpResponse<T>>;
    /**
     * Make a POST request with custom headers.
     *
     * @param path The API endpoint path
     * @param data The request body to send
     * @param headers Additional headers to include
     * @returns The API response
     */
    post<T, D = any>(path: string, data: D, headers?: Record<string, string>): Promise<HttpResponse<T>>;
    /**
     * Make an HTTP request with authentication.
     *
     * @param method The HTTP method
     * @param path The API endpoint path
     * @param data The request body data
     * @param customHeaders Additional headers to include
     * @returns The API response
     */
    private request;
    /**
     * Add authentication headers to a request.
     */
    private addAuthHeaders;
    /**
     * Compute the HMAC-SHA256 MAC for a request.
     *
     * @param path The API endpoint path with query parameters
     * @param headers The request headers
     * @param data The request body data
     * @returns The computed MAC digest
     */
    private computeRequestMac;
    /**
     * Decode a base64 string to a Uint8Array.
     */
    private decodeBase64;
    /**
     * Encode a Uint8Array or Buffer to a base64 string.
     */
    private encodeBase64;
}
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