import { RpcSource } from './index.js';
/**
 * Retrieves the L2 base fee from the gas oracle contract on L1.
 *
 * @param rpc - The RPC source to use for querying the blockchain.
 * @param l1MessageQueueProxyAddress - The address of the L1 message queue proxy contract.
 * @returns A promise that resolves to the L2 base fee as a bigint.
 */
export declare function getGasOracleL2BaseFee(rpc: RpcSource, l1MessageQueueProxyAddress: string): Promise<bigint>;