import { ChainData } from "@0xsquid/squid-types";
import { Token } from "../../core";
import { ChainFeeParams } from "../../services/internal/tempoService";
/**
 * Hook that returns the gas token and chain fee params for a given source chain and token.
 */
export declare function useSourceChainGasToken({ fromChain, fromToken, }: {
    fromChain: ChainData | undefined;
    fromToken: Token | undefined;
}): {
    gasToken: Token | undefined;
    chainFeeParams: ChainFeeParams | null;
};