/** Compute work parameters. */
export interface ComputeWorkParams {
    /** The current worker index, starting at 0 */
    workerIndex?: number;
    /** The count of worker */
    workerCount?: number;
    /** The work threshold, in hex format. Defaults to `ffffffc000000000` */
    workThreshold?: string;
}
/**
 * Find a work value that meets the difficulty for the given hash.
 * Require WebAssembly support.
 *
 * @param blockHash - The block hash to find a work for
 * @param params - Parameters
 * @returns Work, in hexadecimal format, or null if no work has been found (very unlikely)
 */
export declare function computeWork(blockHash: string, params?: ComputeWorkParams): Promise<string | null>;