/**
 * 0x Swap Provider — Aggregated DEX routing via 0x API v2
 *
 * Uses the allowance-holder endpoint (not Permit2) for simpler multicall:
 * we control the approve step in the ERC-7579 batch, so direct allowance is cleaner.
 *
 * API docs: https://0x.org/docs/api
 */
import type { SwapQuoteParams, SwapQuote } from '../types';
import type { SwapProvider } from './swap-provider';
export declare class ZeroXProvider implements SwapProvider {
    private readonly apiKey;
    private readonly chainId;
    readonly name = "0x";
    constructor(apiKey: string, chainId?: number);
    getQuote(params: SwapQuoteParams): Promise<SwapQuote>;
}