import type { TransactionLike, TransactionRequest } from 'ethers';
/** 构建签名用 TransactionRequest 的公共参数 */
export type BuildTxRequestParams = {
    from: string;
    nonce: number;
    gasLimit: bigint;
    gasPrice: bigint;
    priorityFee: bigint;
    chainId: number;
    txType: number;
    value?: bigint;
};
/**
 * 将 populateTransaction 结果与 gas/nonce 字段合并为可签名交易。
 * type 0 (Legacy) 使用 gasPrice；type 2 (EIP-1559) 使用 maxFeePerGas + maxPriorityFeePerGas。
 */
export declare function buildTransactionRequest(unsigned: TransactionLike, { from, nonce, gasLimit, gasPrice, priorityFee, chainId, txType, value }: BuildTxRequestParams): TransactionRequest;