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1 answer
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backend based signature verification

I'm new in web3 and I'm trying to develop a way to authenticate users in my dapp. I'm used to using the old and safe method with email + password to do that, but recently I realised that I could use ...
whoami's user avatar
  • 13
1 vote
1 answer
2k views

how I can sign message using web3js?

I know that I can sign a message using web3js, but I don't know how I can do that, then how to verify that signature using ecrecover()?
Asma's user avatar
  • 11
0 votes
1 answer
754 views

Infura with JWT authentication

I am using wallet connect an Open protocol for connecting Wallets to Dapps with web3 modal sdk . the wallet connect requires an infura key. Since the wallet connect is executed on the borwser it ...
leycun's user avatar
  • 143
0 votes
2 answers
277 views

Unable to install web3.js into my system(WINDOWS 10)

**CMD show this error message ** Geth and python is installed.
Ammara Developer's user avatar
0 votes
0 answers
276 views

Getting empty object in web3js

I have a user registeration logic defined in solidity which used to work fine when I set an registeration fees of 0.5 ETH for testing purpose.But now, when I remove the register fees, I'm not able to ...
Yash's user avatar
  • 11
0 votes
1 answer
1k views

ERC20 Anyone can call approve if knows ABI on contract and my address?

I think I misunderstand something. I'm using a Ganache for developing dApp. I built a default ERC-20 smart-contract. I've built it with truffle. And just for test I write some code in NodeJS: ...
Kirill Varikov's user avatar
2 votes
0 answers
72 views

Authenticating accounts in Ethereum using web3js

Is a there a way to authenticate accounts in Ethereum using Web3js? Or if there are any other ways to authenticate accounts? We are building an application where users can register in our system. ...
Abhishek Pohankar's user avatar
1 vote
2 answers
787 views

Authenticate transaction in Web3.js application with password

I have a simple web3.js based app and like to call a method from an contract. For this method an authenticaten is needed. I found some examples in the web using web3.eth.accounts.signTransaction But ...
The Bndr's user avatar
  • 111
8 votes
1 answer
2k views

Authentication using ethereum account

Trying to figure out a way to Authenticate users them having an ethereum account. New to ethereum and cryptography in general and my thought may not be adequate. In essence I am thinking to be able ...
Emil Iakoupov's user avatar