import { type UnsignedEvent, type Event } from './pure.ts';
/** Get POW difficulty from a Nostr hex ID. */
export declare function getPow(hex: string): number;
export type MinePowOptions = {
    /**
     * By default the miner refreshes `created_at` to the current second while it works and restarts the
     * nonce whenever the second changes, so a long mining run still yields a fresh timestamp. Set this
     * to `true` to leave `created_at` exactly as given. NIP-59 gift wraps and seals must carry a
     * randomized timestamp (up to two days in the past), and any other caller that has already chosen a
     * `created_at` needs it to survive mining.
     */
    keepCreatedAt?: boolean;
};
/**
 * Mine an event with the desired POW. This function mutates the event.
 * Note that this operation is synchronous and should be run in a worker context to avoid blocking the main thread.
 */
export declare function minePow(unsigned: UnsignedEvent, difficulty: number, options?: MinePowOptions): Omit<Event, 'sig'>;