pycoin VS bitcoinbook

Check out 'pycoin' on github:https://github.com/richardkiss/pycoin

You might try the pycoin 'ku' tool: https://github.com/richardkiss/pycoin/blob/main/COMMAND-LINE-TOOLS.md

E.g. pycoin

The above snippet will convert your secret into a private key. Use this private key as an argument to pycoin's ku command (https://github.com/richardkiss/pycoin) — this will generate multiple lines of output, including your private key reformatted as “wif” and ”uncompressed” bitcoin private keys. Import the ”wif” and ”uncompressed” bitcoin private keys into a new Electrum bitcoin wallet.

I went through this exercise myself, just a few days ago. Check out 'pycoin' on github: https://github.com/richardkiss/pycoin

"Mastering Bitcoin" by Andreas M. Antonopoulos: The printed version is not free, the complete text is available on GitHub. It's an excellent resource for understanding Bitcoin from a technical perspective.

The target is stored in the block header. You can see it in any block explorer labeled BITS or nBits. It is stored in a compressed format, as described in Mastering Bitcoin https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch10.asciidoc Scroll down to "Target Representation"

Mastering Bitcoin is a free book - https://github.com/bitcoinbook/bitcoinbook

I also highly recommend that you Read this book "Mastering bitcoin", its free and open source: https://github.com/bitcoinbook/bitcoinbook

You should read this chapter - it kinda explains why the chip need to be able to manipulate and access the private key. It works exactly the same way for every hardware wallet.