Hardhat, ether.js.TypeError:部署人员.sendTransaction不是函数错误.日志含义尝

Question

我试图使用UniswapV3接口执行交换以购买Uni。它给我发送了这个与sendTransaction()函数相关的错误，我不明白为什么我看到过很多这样使用它的例子。

我使用硬帽，你可以看到，从另一个脚本调用getToken()和部署在goerli网络。检查UNI钱包balnceOf()的功能最后工作正常

你会给我什么建议来改进我的代码?

这是代码:

const { ethers, getNamedAccounts, network } = require("hardhat")
const {abi: V3SwapRouterABI} = require('@uniswap/v3-periphery/artifacts/contracts/interfaces/ISwapRouter.sol/ISwapRouter.json')
const FEE_SIZE = 3
function encodePath(path, fees) {
if (path.length != fees.length + 1) {
throw new Error('path/fee lengths do not match')
}
let encoded = '0x'
for (let i = 0; i < fees.length; i++) {
// 20 byte encoding of the address
encoded += path[i].slice(2)
// 3 byte encoding of the fee
encoded += fees[i].toString(16).padStart(2 * FEE_SIZE, '0')
}
// encode the final token
encoded += path[path.length - 1].slice(2)
return encoded.toLowerCase()
}
async function getToken() {
// const signer = provider.getSigner()
const deadline = Math.floor(Date.now()/1000) + (60*10)
const wethToken= "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"
const Uni= "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984"
const UniswapRouter="0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45"
const path = encodePath([wethToken, Uni], [3000])
console.log(path)

const { deployer } = await getNamedAccounts()
const UniV3Contract = await ethers.getContractAt(
V3SwapRouterABI,
UniswapRouter,
deployer
)
const params = {
path: path,
recipient:deployer,
deadline: deadline,
amountIn: ethers.utils.parseEther('0.01'),
amountOutMinimum: 0
}
const encodedData = UniV3Contract.interface.encodeFunctionData("exactInput", [params])
const txArg = {
to: UniswapRouter,
from: deployer,
data: encodedData,
gasLimit: ethers.utils.hexlify(1000000)
}
const tx = await deployer.sendTransaction(txArg)
console.log('tx: ', tx)
const IUni = await ethers.getContractAt(
"IERC20",
Uni,
deployer
)
const UniBlance = await IUni.balanceOf(deployer)
console.log(`Got ${UniBlance.toString()} UNI`)
}
module.exports = { getToken }

不使用硬帽环境:

const {abi: V3SwapRouterABI} = require('@uniswap/v3-periphery/artifacts/contracts/interfaces/ISwapRouter.sol/ISwapRouter.json')
const { ethers } = require("ethers")
require("dotenv").config()
const INFURA_URL_TESTNET = process.env.INFURA_URL_TESTNET
const PRIVATE_KEY = process.env.PRIVATE_KEY
const WALLET_ADDRESS = process.env.WALLET_ADDRESS
// now you can call sendTransaction 

const wethToken= "0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6"
const Uni= "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984"
const UniswapRouter="0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45"
const UniV3Contract = new ethers.Contract(
UniswapRouter,
V3SwapRouterABI
)
const provider = new ethers.providers.JsonRpcProvider(INFURA_URL_TESTNET)
const wallet = new ethers.Wallet(PRIVATE_KEY)
const signer = wallet.connect(provider)

const FEE_SIZE = 3
function encodePath(path, fees) {
if (path.length != fees.length + 1) {
throw new Error('path/fee lengths do not match')
}
let encoded = '0x'
for (let i = 0; i < fees.length; i++) {
// 20 byte encoding of the address
encoded += path[i].slice(2)
// 3 byte encoding of the fee
encoded += fees[i].toString(16).padStart(2 * FEE_SIZE, '0')
}
// encode the final token
encoded += path[path.length - 1].slice(2)
return encoded.toLowerCase()
}
async function getToken() {
const path = encodePath([wethToken, Uni], [3000])
const deadline = Math.floor(Date.now()/1000) + (60*10)  
const params = {
path: path,
recipient: WALLET_ADDRESS,
deadline: deadline,
amountIn: ethers.utils.parseEther('0.01'),
amountOutMinimum: 0
}
const encodedData = UniV3Contract.interface.encodeFunctionData("exactInput", [params])
const txArg = {
to: UniswapRouter,
from: WALLET_ADDRESS,
data: encodedData,
gasLimit: ethers.utils.hexlify(1000000)
}
const tx = await signer.sendTransaction(txArg)
console.log('tx: ', tx)
const receipt = tx.wait()
console.log('receipt: ', receipt)
}
module.exports = { getToken }

Answer 1

我找不到getNamedAccounts的文档，但是当我检查源代码时，我得到了这个签名

getNamedAccounts: () => Promise<{
[name: string]: Address;
}>;

这只返回一个帐户地址数组，用于hardhat.config.js

namedAccounts: {
deployer: {
default: 0, // by default take the first account as deployer
1: 0,
},
},

以编程方式发送事务:

const { ethers } = require("ethers");
const provider = new ethers.providers.JsonRpcProvider(INFURA_TEST_URL);
const wallet = new ethers.Wallet(WALLET_SECRET);
const signer = wallet.connect(provider);
// now you can call sendTransaction
const tx = await signer.sendTransaction(txArg);