import type { BigNumberish, HexString } from './types.js';
export declare function fetchBeaconData(url: string): Promise<any>;
export type BlobSidecar = {
    blob: HexString;
    kzg_commitment: HexString;
};
export declare function fetchSidecars(beaconAPI: string, blockId: BigNumberish): Promise<{
    [k: string]: BlobSidecar;
}>;
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