/**
 * bundle-swap 内部工具函数
 *
 * 供 bundle-swap-single / bundle-swap-batch / bundle-swap-multi 共享使用，
 * 不作为公共 API 导出。
 */
import { ethers, Wallet } from 'ethers';
import type { Call3Value, TradeType } from './types.js';
export declare function getDefaultRouter(tradeType: TradeType): string;
/**
 * 截断小数位数，避免 parseEther/parseUnits 报错
 * @param value 数值字符串
 * @param decimals 保留的小数位数（默认 18）
 */
export declare function truncateDecimals(value: string, decimals?: number): string;
/**
 * 获取卖出报价：预估卖出代币能得到多少 OKB
 */
export declare function quoteSellOutput(sellAmount: bigint, tokenAddress: string, tradeType: TradeType, fee: number, rpcUrl?: string): Promise<bigint>;
export declare function buildBuyCallInternal(wallet: Wallet, amount: bigint, tokenAddress: string, tradeType: TradeType, routerAddress: string, fee: number, delegateInterface: ethers.Interface, portalInterface: ethers.Interface): Call3Value;
export declare function buildSellCallWithAmountInternal(wallet: Wallet, amount: bigint, tokenAddress: string, tradeType: TradeType, routerAddress: string, fee: number, delegateInterface: ethers.Interface, portalInterface: ethers.Interface): Call3Value;