Ethers.js“错误:未知帐户#0 (operation=”getAddress，code=UNSUPPORTED_OPERATION)“

Question

我试图使用KyberSwap从Ethers.js获取ETH的价格，但是我收到了以下错误：

Error: unknown account #0 (operation="getAddress", code=UNSUPPORTED_OPERATION, version=providers/5.5.3)

我连接到一个英弗拉网络套接字来获取数据。这是我的剧本：

const { ethers } = require("hardhat");
const kyberABI = require('./kyberABI.json')

const provider = new ethers.providers.WebSocketProvider("wss://mainnet.infura.io/ws/v3/<project_id>")

const kyberNetworkProxyAddress = "0x818E6FECD516Ecc3849DAf6845e3EC868087B755"
const daiAddress = "0x6b175474e89094c44da98b954eedeac495271d0f"

const kyber = new ethers.Contract(
    kyberNetworkProxyAddress,
    kyberABI.kyberNetworkProxy,
    provider.getSigner(),
);

async function main() {
    // Update eth price from Kyber to reflect current market value
    let curEthPriceUSD
    const updateEthPrice = async () => {
        const results = await kyber.getExpectedRate(
            '0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee',
            daiAddress,
            1
        )
        curEthPriceUSD = results.expectedRate
    }
    await updateEthPrice()
    console.log('Current Ethereum price in USD is: ',
        ethers.utils.formatEther(curEthPriceUSD))
}

main()

如何修复此错误？

Answer 1

在关于Github的相关问题中找到了一个修复程序。

我没有使用provider.getSigner()初始化kyber合同，而是使用一个Wallet对象并从那里抓取签名者：

const wallet = new ethers.Wallet(ethPrivkey, provider);
const signer = wallet.provider.getSigner(wallet.address);

const kyber = new ethers.Contract(
    kyberNetworkProxyAddress,
    kyberABI.kyberNetworkProxy,
    signer
);

Answer 2

有完全相同的错误信息，在我的例子中，这是由于Metamask帐户没有连接。这里的第二行修复了它：

const provider = new ethers.providers.Web3Provider(window.ethereum);
await provider.send('eth_requestAccounts', []); // <- this promps user to connect metamask
const signer = provider.getSigner();