interface RoundtripOptions {
    gateway: string;
    budgetMs?: number;
    pollIntervalMs?: number;
    perRequestTimeoutMs?: number;
}
declare function fetchManifestRoundtrip(cid: string, options: RoundtripOptions): Promise<{
    ok: true;
    manifestBytes: Uint8Array;
} | {
    ok: false;
    reason: string;
}>;

export { type RoundtripOptions, fetchManifestRoundtrip };