if (!window.ethereum) {
  throw new Error('No injected wallet was found');
}

const accounts = await window.ethereum.request({
  method: 'eth_requestAccounts',
});

const activeAccount = accounts[0];

const teqoinNetwork = {
  chainId: '0x66A19',
  chainName: 'TeQoin L2',
  rpcUrls: ['https://rpc.teqoin.io'],
  nativeCurrency: {
    name: 'Ether',
    symbol: 'ETH',
    decimals: 18,
  },
};

async function connectToTeQoin() {
  try {
    await window.ethereum.request({
      method: 'wallet_switchEthereumChain',
      params: [{ chainId: teqoinNetwork.chainId }],
    });
  } catch (error) {
    if (error.code === 4902) {
      await window.ethereum.request({
        method: 'wallet_addEthereumChain',
        params: [teqoinNetwork],
      });
      return;
    }

    throw error;
  }
}

import { ethers } from 'ethers';

const provider = new ethers.BrowserProvider(window.ethereum);
const signer = await provider.getSigner();
const address = await signer.getAddress();

window.ethereum.on('accountsChanged', (accounts) => {
  console.log('accountsChanged', accounts);
});

window.ethereum.on('chainChanged', (chainId) => {
  console.log('chainChanged', chainId);
  window.location.reload();
});