import type { IAttestorClient, IAttestorClientCreateOpts } from '../../types/index.ts';
/**
 * Get a attestor client from the pool,
 * if it doesn't exist, create one.
 * @param [getCreateOpts] - Function to get the options for creating a new client.
 *  called synchronously, in the same tick as this function.
 */
export declare function getAttestorClientFromPool(url: string | URL, getCreateOpts?: () => Omit<IAttestorClientCreateOpts, 'url'>): IAttestorClient;