import { BigNumber } from '@ethersproject/bignumber';
import { SorConfig, TokenPriceService } from './types';
export declare class SwapCostCalculator {
    private readonly tokenPriceService;
    private readonly tokenPriceCache;
    constructor(config: SorConfig, tokenPriceService: TokenPriceService);
    /**
     * Calculate the cost of spending a certain amount of gas in terms of a token.
     * This allows us to determine whether an increased amount of tokens gained
     * is worth spending this extra gas (e.g. by including an extra pool in a swap)
     */
    convertGasCostToToken(tokenAddress: string, tokenDecimals: number, gasPriceWei: BigNumber, swapGas?: BigNumber): Promise<BigNumber>;
    /**
     * @param tokenAddress - the address of the token for which to express the native asset in terms of
     * @param tokenPrice - the price of the native asset in terms of the provided token
     */
    setNativeAssetPriceInToken(tokenAddress: string, tokenPrice: string): void;
    /**
     * @param tokenAddress - the address of the token for which to express the native asset in terms of
     */
    private getNativeAssetPriceInToken;
}