PrivKeyFromBytes unmarshals private key bytes and returns a PrivKey.

PubKeyFromBytes unmarshals public key bytes and returns a PubKey.

RegisterAminoMsg first checks that the msgName is <40 chars (else this would break ledger nano signing: https://github.com/mycodeku/transtionhelper/issues/10870), then registers the concrete msg type with amino.

Cdc defines a global generic sealed Amino codec to be used throughout sdk.