Add the Optimism or Arbitrum Network to your Wallet
In order for Uniswap v3 to allow swapping, it needs to connect to a wallet that has the right network configuration. This is easy to do: Login to MetaMask on your browser Click on the Networks dropdown menu at the top. It usually says something like ‘Ethereum Mainnet,’ and is right beside the MetaMask fox logo.
Add the Optimism or Arbitrum Network to your Wallet
In order for Uniswap v3 to allow swapping, it needs to connect to a wallet that has the right network configuration. This is easy to do: Login to MetaMask on your browser Click on the Networks dropdown menu at the top. It usually says something like ‘Ethereum Mainnet,’ and is right beside the MetaMask fox logo.
