text: 
  const addEthereumChain = document.getElementById('addEthereumChain')
  
  addEthereumChain.onclick = async () => {
      await ethereum.request({
        method: 'wallet_addEthereumChain',
        params: [{
          chainId: '0x64',
          rpcUrls: ['https://dai.poa.network'],
          chainName: 'xDAI Chain',
          nativeCurrency: { name: 'xDAI', decimals: 18, symbol: 'xDAI' },
          blockExplorerUrls: ['https://blockscout.com/poa/xdai'],
        }],
      })
  };