6
I am using metamask with kovan to connect to the wallet 
import React, { useState, useEffect} from 'react';
import Web3 from "web3";
import Web3Modal from "web3modal";
import Navbar from './components/navbar';

function App() {
const providerOptions = {};
const web3Modal = new Web3Modal({
  network: "mainnet", // optional
  cacheProvider: true, // optional
  providerOptions // required
});

  const [account, setAccount] = useState('');
  async function connect() {
    try {
      const provider = await web3Modal.connect();
      const web3 = new Web3(provider);
      const accounts = await web3.eth.getAccounts();
      setAccount(accounts[0]);
    } catch (err) {
      console.error(err);
    }
  }


  useEffect(() => {
    if (window.web3) {
      connect();
    }
  }, []);

   async function disconnect() {
    const clear = await web3Modal.clearCachedProvider();
  }

  return (
    <div>
     <Navbar account={account} connect={connect} disconnect={disconnect} />
    </div>
  );
}

export default App;

how do i disconnect from the metamask?

3

It's not possible.

The connect/disconnect functionality is entirely in the user's hands due to security and privacy concerns.

You can only pretend a disconnect by resetting a provider, chainId and selectedAccount to null and clearing the cache of the provided you previously used.

P.S.: I know this is a harsh reality. Upvote this as it's the only correct answer that there is! You have to pretend from your app that the user has disconnected. This is the way I do it in my dapp, the way PancakeSwap does, Uniswap too, etc...

0

I think what you can do is to call:

  // TODO: Which providers have close method?
  if(provider.close) {
    await provider.close();

    // If the cached provider is not cleared,
    // WalletConnect will default to the existing session
    // and does not allow to re-scan the QR code with a new wallet.
    // Depending on your use case you may want or want not his behavior.
    await web3Modal.clearCachedProvider();
    provider = null;
  }

You can also find the example here.

2
  • 1
    It does not work anymore.
    – porton
    Dec 14 '20 at 9:18
  • TypeError: provider.close is not a function Jul 6 '21 at 13:50
0

Hello Sir You Could Wait For Event To Be Fired When Disconnecting(User Deletes Connection in Metamask From Dapp) And Then Dispatch A Action With New Address If there is any other Accounts Currently Connected To Dapp else you Can Call Disconnect Function

         const provider = await new web3(web3.givenProvider);
         provider.on('accountsChanged', (code: number, reason: string) => {
                        const accountSwitch = code[0];
                        if (accountSwitch){
                            if (accountSwitch) {
                                dispatch({
                                    type: _const.ADDRESS,
                                    payload: { address: accountSwitch }
                                })
                            }
                        }else{
                            DisconnectFromWallet();
                        }
                    });

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