Quote from: ranochigo on Today at 01:12:14 AM

Quote from: alex2733 on April 09, 2020, 10:04:18 PM

Hi dears

I'm a software developer but I'm new on bitcoin or blockchain programming
I want to implement a bitcoin-based web app that creates address'es for users and just makes transactions.

You'll need a database to keep track of the user's addresses and the Bitcoins in each of the addresses. Ensuring the security and managing the Bitcoins for users is no easy feat and it generally isn't recommended for anyone to develop wallets from scratch.

Quote from: alex2733 on April 09, 2020, 10:04:18 PM

Did we need to have our full node for creating transactions?

To craft a transaction, you don't need a full node or any client for that matter. All you need is to write a code which manages the scripts and signs the transaction using the private key. It isn't very hard and there are quite a few libraries[1] that you can use.

Quote from: alex2733 on April 09, 2020, 10:04:18 PM

Could we confirm and create transactions over DNS seeds?

DNS seeds fetches the IP addresses of a few nodes that are always online on the Bitcoin network. The seeds are not nodes by themselves and you cannot request any usable information about Bitcoin blockchain from there. You can only query and send information over to the Bitcoin node but you can't connect to them to create transactions.

I won't recommend you to only retrieve information without further verification. Operating a payment server without operating a full node is dangerous given the attack vectors.
[1] https://github.com/1200wd/bitcoinlib

Thank you

So for broadcasting transactions on the network we need a full node for security reasons ?