import type { ExtendedViemClient } from '../../../client.js';
import type { Provider } from '../transports/index.js';
/**
 * Gets the slot of the lowest confirmed block that has not been purged
 *
 * @param client - Extended Viem client
 * @param params - Parameters for {@link sol_getFirstAvailableBlock}
 * @returns Promise resolving to first available block slot
 */
export declare function getFirstAvailableBlock(client: ExtendedViemClient, ...params: Parameters<Provider['sol_getFirstAvailableBlock']>): Promise<bigint>;