Improved BIP39 Backwards compatibility about codex32 HOT 2 CLOSED

It's probably worthwhile to spec this all out somewhere (I haven't read it carefully yet -- though my first comment is that we should replace ms because BIP39 words are not master seeds; I use bip39_12 and bip39_24 for my own stuff), but we made a deliberate decision not to include it in the BIP anywhere, both as a BIP39 protest and because we are not interested in maintaining any bip39 related code.

It's also a lot of extra complexity that can lead to user error -- in particular, having done the "convert to binary then to base 2^11" process by hand, I can say that it's a frequent source of errors and that you have no checksum to help you. So it winds up being the weak link in the entire process and undermines all the other work.

Maybe it could try to be "SLIP93" or something? It seems like the SLIPs repo is often the "home for specs that users want but purists don't".

from codex32.

I have a total of zero funded bip39 seed backups and my project doesn't plan to support bip39 importing (or conversion either) so I have no need to complete this now. I'll offer some help if someone else wants this.

Do note the typo in the paragraph I quoted if you have a bip update planned

from codex32.