import { type EstimateL1FeeParams } from "./types";
/**
 * Get the estimated L1 fee for a given L2 chain.
 * @param env The environment to use. Either "mainnet" or "testnet".
 * @param chain The destination L2 chain.
 * @param params The parameters to use for the estimation.
 * @returns
 */
export declare function getL1FeeForL2(rpcUrl: string, params: EstimateL1FeeParams): Promise<bigint>;