@scure/bip32

[dynst]

Closes #1721

[webmaster128]

What's the motivation for this change? We have a perfectly working well tested implementation now and replace it with additional dependencies that potentially cause new trouble later on.

[dynst]

I thought replacing custom code with 2 small high quality paulmillr-written packages might ease maintainability similar to the switch to using @scure/bip39, as well as reduce code redundancy in app bundles that already pull in these packages. But good point. Feel free to close this if it's not worth it.

[webmaster128]

I see. Yeah. But in this case I would lean towards not touch a running system without a need.

There is also another aspect here: it might be worth deprecating and eventually removing slip10 support from CosmJS. This was built for a blockchain in 2018 which used ed25519 HD accounts. However, the entire framework (weave) for buildung those blockchain is long dead. I never saw ed25519 keypairs for user accounts in Cosmos SDK based chains and cosmos/cosmos-sdk#8543 seems to be going nowhere. So we can as well ditch the slip10 part to simplify that code.