import 32-byte seed instead of 64-byte key-pair

[liamsi]

fix #112

[tarcieri]

Would be good to add a test for this. Offhand I can't remember why I didn't write one for generate...

[liamsi]

I'll open an issue for adding test in a separate PR (for import and the other commands).

Offhand I can't remember why I didn't write one for generate...

I just didn't add a test because there were none for generate and I assumed that the yubihsm might be non-trivial to mock.

[tarcieri]

I assumed that the yubihsm might be non-trivial to mock.

It is, but it's already been done:

https://docs.rs/yubihsm/latest/yubihsm/mockhsm/struct.MockHsm.html

...and the mock HSM will be automatically used in the tests when you enable the yubihsm-mock cargo feature:

https://github.com/tendermint/kms/blob/master/Cargo.toml#L47
https://github.com/tendermint/kms/blob/master/src/yubihsm.rs#L59