It often happens that users come into the Hop discord and claim that they didn't receive their funds because it's not showing in Metamask.
Often it turns out that these users had received their funds but they were just not displayed in the Metamask UI.
We'll show you two things:
1) How to find out if the tokens have arrived using a block explorer
2) How to manually add a token to the Metamask user interface
Metamask is just an interface that connects to the Blockchain for you. Sometimes this interface can be buggy and sometimes it doesn't automatically show specific tokens especially on Layer-2 chains.
The best way to find out if your tokens have arrived is by going to a block explorer. The Blockchain is the single source of truth and a block explorer shows you all the data belonging to your account.
For example if you want to see if your funds on have arrived on Optimism you would go to Optimistic Etherscan.
Paste your wallet address in the big search bar of the home page of the block explorer site and you will see a new page showing data of your account.
In the token dropdown you will see all the tokens that are held in your wallet. If you see your tokens there you can be assured that everything went well and that it's simply a matter of Metamask not showing your tokens.
Now that you know the token is there, let's import it manually into Metamask so that the interface shows it too. To do that go into the "Assets" tab and scroll to the bottom where you'll see a "Import tokens" link.
You will then see a form which requires you to paste the address of the token you want to add. You can find the address of a token by typing it's ticker symbol (e.g "USDC) into the block explorer of the chain you are on ( e.g Optimistic Etherscan) or by looking it up on popular directories such as Coingecko.
NOTE: Tokens have different addresses on each chain they exist on ! E.g USDC address on Ethereum is different than USDC on Optimism!
Once you paste the address the other fields like Token Symbol and Token Decimal will auto-populate.
Click on "Add Custom Token" and you're done. Yo will now see your token in Metamask :-)