Hello everyone, how to do authentication on backend from frontend by

Question

Solidity Development

Amin Malekzadeh

Hello everyone, how to do authentication on backend from frontend by

web3?

#english #programming #solidity

0

15.03.2022

7 ответов

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Amin Malekzadeh Автор вопроса

William Oney
authentication of what?

Actually, I want authentication user on backend but this authentication of frontend by web3, should we use jwt again?

0

15.03.2022

William Oney

What kind of authentication is it? E.g. for google, front-end gets token from google, sends token to back-end, back-end contacts google to check if token is authentic.

0

15.03.2022

Amin Malekzadeh Автор вопроса

William Oney
What kind of authentication is it? E.g. for googl...

by metamask or wallet connect and another connectors

0

15.03.2022

William Oney

Amin Malekzadeh
by metamask or wallet connect and another connecto...

Are you trying to authenticate an EOA? Like that the person with some address is really the signer? In that case, you could have back-end send a random challenge msg to client, client signs msg and sends to backend, backend verifies signature.

0

15.03.2022

Amin Malekzadeh Автор вопроса

Actually, we want mint a NFT but before mint it. first we need to authenticate the user on backend for save data on database

0

15.03.2022

William Oney

Amin Malekzadeh
Actually, we want mint a NFT but before mint it. f...

Ok, so you would authenticate on a per-address basis, so yes, if user changes accounts in metamask, you'd want to reauth if it's a new address that you haven't authed before for that user. So in a DB you'd want some kind of structure like {user: {authedAddresses:[0xabcd123..., 0xfedc987...]} Then if the user logs in the next day, they wont have to reauth their accounts again (assuming they're logging in to whatever service you're providing)

0

15.03.2022

William Oney · Accepted Answer

William Oney

authentication of what?

0

15.03.2022

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Hello everyone, how to do authentication on backend from frontend by

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