Phantom Polygon Switch

switcher.js

const addMaticToMetamask: () => void = () => {
    const { ethereum, phantom } = window as any;
    if (ethereum) {
      ethereum
        .request({
          method: 'wallet_addEthereumChain',
          params: [
            {
              chainId: '0x89',
              chainName: 'Polygon Network',
              rpcUrls: ['https://polygon-rpc.com/'],
              iconUrls: [
                'https://raw.githubusercontent.com/trustwallet/assets/master/blockchains/ethereum/assets/0x7D1AfA7B718fb893dB30A3aBc0Cfc608AaCfeBB0/logo.png',
              ],
              blockExplorerUrls: ['https://polygonscan.com/'],
              nativeCurrency: {
                name: 'Matic Token',
                symbol: 'MATIC',
                decimals: 18,
              },
            },
          ], // you must have access to the specified account
        })
        .catch((error: any) => {
          if (error.code === 4001) {
            console.log('We can encrypt anything without the key.');
          } else {
            console.error(error);
          }
        });
    }
    if (phantom) {
        phantom.ethereum
          .request({
            method: 'wallet_switchEthereumChain',
            params: [
              {
                chainId: '0x89',
              }
            ], // you must have access to the specified account
          })
          .catch((error: any) => {
            if (error.code === 4001) {
              console.log('We can encrypt anything without the key.');
            } else {
              console.error(error);
            }
          });
      }

  };