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Accepted
Is it possible to do two-factor verification (email, text, let's say) using ethereum?
The Ethereum network is mostly a bubble technically speaking in terms of how data moves. In order to get any non Ethereum data on chain, you need oracles. Its kind of like an island. There are ...
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I can send emails from a smart contract?
No, you cannot send emails from an Smart Contract. You can even connect with any kind of external source of information (API or whatever). To do so, you must implement an oracle system like Chainlink.
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