import { TradeState } from 'state/routing/types';
export declare const INVALID_TRADE: {
    state: TradeState;
    trade: undefined;
};
/**
 * Returns the best v2+v3 trade for a desired swap.
 * @param tradeType whether the swap is an exact in/out
 * @param amountSpecified the exact amount to swap in/out
 * @param otherCurrency the desired output/payment currency
 */
