无法使用Etherjs从signTransaction获取事务散列

Question

我正在尝试创建一个脚本，该脚本生成一个交换事务，然后打印出提交的事务的事务哈希，但我一直得到“未定义的”，即使我期待“0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx提前谢谢！

const ethers = require("ethers");    
const url = 'ws://172.33.x.x:8546';
const router_abi = require('./uniswapABI.json');
var uniswap_address = '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D'.toLowerCase()
const weth_contract_address = '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2'.toLowerCase();
const contract_address = '0xE7a7De362179108E26E464a39B204a9561B352cf'.toLowerCase();

var accounts = 'xxxxxxxxxxxxxx';
var pks = 'xxxxxxxxxxxxx';

const input = {
    GAS_LIMIT: '428000',
    ETH_AMOUNT: '.01', 
    AMOUNT_OUT: '0'
};

async function Buy_fx11() {
    
    const connection = new ethers.providers.WebSocketProvider(url);
    const pk_fixed = Buffer.from(pks, 'hex');
    const wallet = new ethers.Wallet(pk_fixed, connection);
    const signer = wallet.connect(connection)
    const count = await connection.getTransactionCount(wallet.address);

    const router = new ethers.Contract(uniswap_address, router_abi, signer);

    const tx = await router.swapExactETHForTokensSupportingFeeOnTransferTokens(
        input.AMOUNT_OUT,
        [weth_contract_address,contract_address],
        wallet.address,
        Date.now() + 90000,
        {
            value: ethers.utils.parseEther(input.ETH_AMOUNT),
            gasLimit: input.GAS_LIMIT,
            maxPriorityFeePerGas: ethers.utils.parseUnits("20", "gwei"),
            maxFeePerGas: ethers.utils.parseUnits("100", "gwei"),
            }
        );

    const finaltx = await signer.signTransaction(tx);  
    console.log(finaltx.hash);
}

Answer 1

您已经创建了带有签名者的router，因此调用router.swapExactETHForTokensSupportingFeeOnTransferTokens使其能够签名和发送事务。

尝试使用tx.hash来获取transaction_hash，使用tx.wait()确保事务被挖掘。