So specifically I am using BitcoinJS to sign a transaction and get the raw HEX data. Now, since I don't want to run my own full bitcoin nodes, I am considering using one of the many services out there that pushes the hex data and broadcasts it to the bitcoin network (such as:
https://www.localbitcoinschain.com/tx/send).
Now, my question is: Is this safe at all?
Could someone derive my private key from the hex data? (I'm assuming not right? Since it shouldn't be possible to decrypt once signed?)
I just want to make sure if it's safe to use any of these services to broadcast my bitcoin transactions and making sure no one gets access to the user's funds if the user decides to push tx through these services)
Thanks in advance!