I'm building an application with next.js and web3. To connect the user wallet to the front-end I'm using web3modal as following:

const Home: NextPage = () => {
  const [signer, setSigner] = useState<JsonRpcSigner | null>(null)

  async function connect() {
    const web3Modal = new Web3Modal()
    const connection = await web3Modal.connect()
    const provider = new ethers.providers.Web3Provider(connection)
    const signer = provider.getSigner()

    setSigner(signer)
  }

  return (
    <div className="flex justify-center">
      <button onClick={() => connect()}>Connect wallet</button>
      { signer && (
        <h3>wallet connected: {signer._address}</h3>
      )}
    </div>
  )
}

The user can successfully connect the wallet, unfortunately signer._address is always null. I'd like to display to the user with address has just been connected, how can I fix this?

I'm building an application with next.js and web3. To connect the user wallet to the front-end I'm using web3modal as following:

const Home: NextPage = () => {
  const [signer, setSigner] = useState<JsonRpcSigner | null>(null)

  async function connect() {
    const web3Modal = new Web3Modal()
    const connection = await web3Modal.connect()
    const provider = new ethers.providers.Web3Provider(connection)
    const signer = provider.getSigner()

    setSigner(signer)
  }

  return (
    <div className="flex justify-center">
      <button onClick={() => connect()}>Connect wallet</button>
      { signer && (
        <h3>wallet connected: {signer._address}</h3>
      )}
    </div>
  )
}

The user can successfully connect the wallet, unfortunately signer._address is always null. I'd like to display to the user with address has just been connected, how can I fix this?

• javascript
• reactjs
• next.js
• web3js

3 Answers 3

This is not a question about web3Modal, but a question about ethers.

You can get the address like this:

const [address, setAddress] = useState()
// ...
setAddress(await signer.getAddress())

The documentation is here: https://docs.ethers.io/v5/api/signer/#Signer-getaddress

provider.getSigner() returns a promise.

You should use await to get the actual address

const signer = provider.getSigner();
const address = await signer.getAddress();
setAddress(address);

you can get the address using the following

const account=(await provider.listAccounts())[0]