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Why is it necessary to manually add a token you will transact in (before the actual transaction) in Metamask? What happens if someone doesn't do that before a transaction, to display that balance in Metamask?

Thanks.

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Metamask doesn't collect information about a token unless you add the token. Internally metamask starts listening to events of the particular smart contract to provide you the balance of your addresses in those contracts.

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  • Thanks. Got it. But what happens if someone doesn't add the token first? Can't Metamask query the contract to get my balance, if someone adds it later? – Ayush Mar 7 at 19:03
  • Yes, you can add it at any moment, then metamask will show your token balance. – Jaime Mar 7 at 22:04

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