import { SSEEvent } from '../models/types';
export declare class SSEService {
    /**
     * Parses a single SSE line into an event.
     * Returns null for non-data lines, empty lines, and malformed JSON.
     */
    static parseLine(line: string): SSEEvent | null;
    /**
     * Async generator that reads a ReadableStream<Uint8Array> and yields SSEEvents.
     * Buffers partial lines across chunk boundaries.
     *
     * When `signal` is provided and aborted, the in-flight reader is canceled
     * and the generator returns cleanly.
     */
    static streamEvents(stream: ReadableStream<Uint8Array>, signal?: AbortSignal): AsyncGenerator<SSEEvent>;
}