通过网页切换metamask主网

和前面的文章类似：metamask小狐狸钱包 eth_sendTransaction接口发起指定币种交易

通过 ethereum.request 发起切换主网请求，metamask小狐狸钱包，通过点击接受或同意切换请求，即可切换到对应主网，无需用户一点点设置填写主网信息

1
function switch_network(network){
2
    const bsc = {
3
      chainId: '0x38', // 币安主网的chainId是56
4
      chainName: 'Smart Chain',
5
      nativeCurrency: {
6
        name: 'BNB',
7
        symbol: 'bnb',
8
        decimals: 18,
9
      },
10
      rpcUrls: ['https://bsc-dataseed.binance.org/'],
11
      blockExplorerUrls: ['https://bscscan.com/'],
12
    };
13
    const eth = {
14
      chainId: '0x1', // 以太坊主网的chainId是1
15
      chainName: 'Ethereum Mainnet',
33 collapsed lines
16
      nativeCurrency: {
17
        name: 'ETH',
18
        symbol: 'eth',
19
        decimals: 18,
20
      },
21
      rpcUrls: ['https://eth.llamarpc.com','https://mainnet.infura.io/v3/'],
22
      blockExplorerUrls: ['https://etherscan.io/'],
23
    };
24
    var main ='';
25
    if(network=='bsc'){
26
      main = bsc;
27
    }else if(network=='eth'){
28
      main = eth;
29
    }else{
30
      alert('还不支持当前主网，请切换到币安或以太坊主网');
31
      return false;
32
    }
33
    console.log(main)
34
    ethereum
35
      .request({
36
        method: 'wallet_addEthereumChain',
37
        params: [main],
38
      })
39
      .then((result) => {
40
        console.log(result);
41
      })
42
      .catch((error) => {
43
        console.log(error);
44
      })
45
      .finally(() => {
46
        console.log('finally');
47
      });
48
}

各主网对应的填写信息可以在这里查到： https://chainlist.org