import { Currency } from '../entities/Currency';
import { CurrencyAmount } from '../entities/CurrencyAmount';
import { Percent } from '../entities/Percent';
import { Price } from '../entities/Price';
/**
 * Returns the percent difference between the mid price and the execution price, i.e. price impact.
 * @param midPrice mid price before the trade
 * @param inputAmount the input amount of the trade
 * @param outputAmount the output amount of the trade
 */
export declare function computePriceImpact<TBase extends Currency, TQuote extends Currency>(midPrice: Price<TBase, TQuote>, inputAmount: CurrencyAmount<TBase>, outputAmount: CurrencyAmount<TQuote>): Percent;