export type RequestDebugHeaders = Headers | Record<string, string | string[] | number | undefined | null> | undefined;
export interface RequestDebugPayload {
    method: string;
    url: string;
    headers?: RequestDebugHeaders;
    body?: unknown;
    bodyText?: string;
    bodyBase64?: string;
    bodyUnavailable?: string;
    protocol?: string;
}
export interface RequestDebugResponseLog {
    write(chunk: Uint8Array | string): void;
    close(): Promise<void>;
}
export interface RequestDebugSession {
    readonly id: number;
    readonly requestPath: string;
    readonly responsePath: string;
    openResponseLog(statusLine: string, headers?: RequestDebugHeaders): Promise<RequestDebugResponseLog>;
    wrapResponse(response: Response): Promise<Response>;
}
export declare function isRequestDebugEnabled(): boolean;
export declare function createRequestDebugSession(payload: RequestDebugPayload): Promise<RequestDebugSession>;
/**
 * Dump a fetch-shaped request to `rr-session-N.json`; the returned session's
 * `wrapResponse` streams the raw response into `rr-session-N.res.log`. Called
 * per request by `transportFetch` while `PI_REQ_DEBUG=1`.
 */
export declare function createFetchRequestDebugSession(input: string | URL | Request, init: RequestInit | undefined): Promise<RequestDebugSession>;