that can help beginners
for that i think you need to work more on the explanation part and start by explaining how to run this tool step by step and on each step you should try explaining what exactly is happening. for example
- what is a transaction (parts that it has, the role of previous transaction, scripts,...)
- what is the signature
- what are public/private key pairs
- what happens when you broadcast the signed tx
- how a block is mined
- how do nodes communicate with each other.
there is also something odd about the keys in your screenshot, from the code it seems like you are using RSA. why use that instead of Elliptic Curve DSA since it is more popular?
also are these keys encoded using DER? you might want to specify the encoding that your code accepts.
also this following part doesn't sound correct:
The blockchain is for authorizing payments of a cryptocurrency between two peers without the need for a centralized 3rd party approving of the transaction.
blockchain is only for "storing" the transaction history and "chain" or link them together using cryptography and in coins such as bitcoin by doing "work" hence the term proof of work. so blockchain only works as the public immutable ledger that only grows. the "authorization" happens by the user when they provide a digital signature.
