export interface SseFrame {
    id?: string;
    data: unknown;
}
export interface ParsedSseEvent {
    id: string | undefined;
    data: string;
}
export declare function formatSseFrame(frame: SseFrame): string;
export interface SseEndFrame {
    end: true;
    reason: string;
}
export declare const SSE_END_FRAME: SseEndFrame;
export declare function isSseEndFrame(payload: unknown): payload is SseEndFrame;
export interface ParseSseChunkResult {
    events: ParsedSseEvent[];
    remainder: string;
}
export declare function parseSseChunk(buffer: string): ParseSseChunkResult;