import { ChainProvider } from '../router';
import { Slippage } from './core';
import { RouteInput, SwapEngineQuote, SwapEngineRoute } from './models';
import { Prettify, TokenMetadataFetcher } from '../utils';
declare type QuoteOptions = {
    allowMultiStep: boolean;
    timeout?: number;
};
declare type RouteOptions = Prettify<QuoteOptions & {
    slippage?: Slippage;
}>;
export declare class SwapEngineSet {
    private engines;
    private tokenZaps;
    private providers;
    private tokenMetadataFetcher;
    constructor(chains: ChainProvider[], tokenMetadataFetcher?: TokenMetadataFetcher);
    getBestQuote(input: RouteInput, options: QuoteOptions): Promise<SwapEngineQuote | undefined>;
    getQuote(engineID: number, input: RouteInput, options: QuoteOptions): Promise<SwapEngineQuote | undefined>;
    generateRoute(input: RouteInput, quote: SwapEngineQuote, options: RouteOptions): Promise<SwapEngineRoute | undefined>;
    getTokenZap(chainId: number): string;
    private _addEngine;
    private _getEngine;
    private _getQuote;
    /**
     * Applies the engine filter to the engine promises and returns the first non-Zero quote.
     * Returns undefined if no non-Zero quote is found.
     * Ensures all promises are handled to prevent unhandled rejections.
     */
    private _getFastestQuote;
}
export {};