/// <reference types="node" />
import { Blockchain } from '../blockchain';
import { BlockHeader } from '../primitives';
export declare function getBlockRange(chain: Blockchain, range?: {
    start?: number | null;
    stop?: number | null;
}): {
    start: number;
    stop: number;
};
declare function blockHeaderBySequenceOrHash(chain: Blockchain, start: Buffer | number): Promise<BlockHeader | null>;
export declare const BlockchainUtils: {
    getBlockRange: typeof getBlockRange;
    blockHeaderBySequenceOrHash: typeof blockHeaderBySequenceOrHash;
};
export {};
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