import { BigNumber } from '@ethersproject/bignumber';
import { CurrencyAmount, Percent, Token, Trade } from '../entities';
import { TradeType } from '../enums';
import JSBI from 'jsbi';
import { Currency } from '../types';
export declare const ZERO_PERCENT: Percent;
export declare const ONE_HUNDRED_PERCENT: Percent;
export declare function isTradeBetter(tradeA: Trade<Currency, Currency, TradeType> | undefined | null, tradeB: Trade<Currency, Currency, TradeType> | undefined | null, minimumDelta?: Percent): boolean | undefined;
export declare function calculateGasMargin(value: BigNumber): BigNumber;
export declare function calculateSlippageAmount(value: CurrencyAmount<Currency>, slippage: Percent): [JSBI, JSBI];
export declare function computeFiatValuePriceImpact(fiatValueInput: CurrencyAmount<Token> | undefined | null, fiatValueOutput: CurrencyAmount<Token> | undefined | null): Percent | undefined;