I used Nonces for the First time and it Worked

Ashutosh — Sat, 29 Aug 2026 17:25:18 +0000

I built a wallet based login.

Signature verification was working, but then I thought the same signature can be reused anytime.

Read some docs and got to know about Nonces.

Implemented it in my code and got it working right.

Now, the user auth flow is much more secure against replay attacks.

I have written down what I learned here, check it out -

https://medium.com/@ashutosh122002/nonce-explained-72c26e92b7ce

I Built a DeFi Wallet Dashboard -

Ashutosh — Fri, 28 Aug 2026 11:40:06 +0000

I just built a DeFi wallet dashboard.

It shows a wallet’s ETH balance and current ETH price.

During the time I was building it and dissecting through the topics, I understood that we only need to build a backend layer between the request and the response.

And that backend needs to connect three things together in order to complete the whole flow -

The backend (what we are building)
Connection to Ethereum blockchain (to check the user’s Eth balance)
Connection to CoinGecko (to fetch the current ETH price)-

I wrote the complete breakdown here, check it out -
https://medium.com/@ashutosh122002/i-built-a-defi-wallet-dashboard-332aab245f68

DEV Community: Ashutosh

I used Nonces for the First time and it Worked

I Built a DeFi Wallet Dashboard -