/**
 * 换手交易通用工具函数
 */
import { Wallet, JsonRpcProvider } from 'ethers';
/**
 * 检查并执行代币授权（如果需要）
 * ✅ 与 pancake-proxy.ts 的授权逻辑一致
 */
export declare function ensureTokenApproval(provider: JsonRpcProvider, merkle: any, wallet: Wallet, tokenAddress: string, spenderAddress: string, config: {
    gasLimit?: number;
    gasLimitMultiplier?: number;
    minGasPriceGwei?: number;
    maxGasPriceGwei?: number;
    txType?: 0 | 2;
    bundleBlockOffset?: number;
    waitTimeoutMs?: number;
}): Promise<void>;
/**
 * 获取代币余额
 */
export declare function getTokenBalance(provider: JsonRpcProvider, tokenAddress: string, walletAddress: string): Promise<bigint>;
/**
 * 获取代币精度
 */
export declare function getTokenDecimals(provider: JsonRpcProvider, tokenAddress: string): Promise<number>;
/**
 * 计算卖出数量（支持百分比）
 */
export declare function calculateSellAmount(provider: JsonRpcProvider, tokenAddress: string, walletAddress: string, sellAmount?: string, sellPercentage?: number): Promise<{
    amount: bigint;
    decimals: number;
}>;
/**
 * 计算换手损耗百分比
 */
export declare function calculateSwapLoss(sellAmount: bigint, buyAmount: bigint): string;
/**
 * 验证钱包BNB余额
 */
export declare function validateBNBBalance(provider: JsonRpcProvider, walletAddress: string, requiredBNB: bigint, purpose: string): Promise<void>;
/**
 * 格式化换手结果日志
 */
export declare function logSwapResult(params: {
    sellerAddress: string;
    buyerAddress: string;
    tokenAddress: string;
    sellAmount: bigint;
    buyAmount: bigint;
    decimals: number;
    sellerGotBNB: bigint;
    buyerSpentBNB: bigint;
    swapType: string;
}): void;