Metamask: How to change the network configuration by code

参考：https://patricio-lopez-75857.medium.com/metamask-how-to-change-the-network-configuration-by-code-21f25d04d932

进入console，把下面的代码放进就可以了，如果出现报错就把第二行window.web3 = new Web3(window.ethereum)删除，就会自动连接fuji网络，选择用户，因为已经创建了很多测试账户。

if(window.ethereum) {
window.web3 = new  Web3(window.ethereum)
window.ethereum.request({method: 'eth_requestAccounts'})//这一行是自动连接钱包
window.ethereum.request({
method: 'wallet_addEthereumChain',
params: [{chainId: '0xa869',
chainName: "Fuji Testnet",
nativeCurrency: {
name: "AVAX",
symbol: "AVAX",
decimals: 18
},
rpcUrls: ['https://api.avax-test.network/ext/bc/C/rpc'],     blockExplorerUrls: ['https://cchain.explorer.avax-test.network/']
}]
})
}