import type { Config } from './types.gen.js';
export type ServerSentEventsOptions<TData = unknown> = Omit<RequestInit, 'method'> & Pick<Config, 'method' | 'responseTransformer' | 'responseValidator'> & {
    fetch?: typeof fetch;
    onRequest?: (url: string, init: RequestInit) => Promise<Request>;
    onSseError?: (error: unknown) => void;
    onSseEvent?: (event: StreamEvent<TData>) => void;
    serializedBody?: RequestInit['body'];
    sseDefaultRetryDelay?: number;
    sseMaxRetryAttempts?: number;
    sseMaxRetryDelay?: number;
    sseSleepFn?: (ms: number) => Promise<void>;
    url: string;
};
export interface StreamEvent<TData = unknown> {
    data: TData;
    event?: string;
    id?: string;
    retry?: number;
}
export type ServerSentEventsResult<TData = unknown, TReturn = void, TNext = unknown> = {
    stream: AsyncGenerator<TData extends Record<string, unknown> ? TData[keyof TData] : TData, TReturn, TNext>;
};
export declare const createSseClient: <TData = unknown>({ onRequest, onSseError, onSseEvent, responseTransformer, responseValidator, sseDefaultRetryDelay, sseMaxRetryAttempts, sseMaxRetryDelay, sseSleepFn, url, ...options }: ServerSentEventsOptions) => ServerSentEventsResult<TData>;