Preparing Key for Authentication

From CLI

Use "sixd" CLI to export the key from your keyring

sixd keys export mykey

Passphrase is required to encrypt the exported private key

and after setup passphrase the information will look like this:

-----BEGIN TENDERMINT PRIVATE KEY-----
type: secp256k1
kdf: bcrypt
salt: 442D382328B89599F99DB688AF91B8BB

EThQx4G+uO2xehgIv0GwmhnCEIA/beeMVXLj0w6/x6Ryecdrkuu3yPzdvh+VX/Ac
UJigQWkwnVPH0xVU2AnFKN4f3cBT6D2ldNfAEQ8=
=WOlG
-----END TENDERMINT PRIVATE KEY-----

This is called an armored key and together with the passphrase are used in SIX Protocol Go SDK for authentication.

From seed phrase

You can import your seed phrase into keyring:

sixd keys add --recover <your-account-name>

After enter a bip39 mnemonic you can export by following the previous steps to get armored (encrypted) private file and passphrase for SDK of SIX Protocol Go version.