- always store 'keystore_type' in cosigner data and use same types as main - dont share 'hardware_device' in root of dict, but store for each cosigner - properly return hardware keystore for hardware cosigners
- always store 'keystore_type' in cosigner data and use same types as main - dont share 'hardware_device' in root of dict, but store for each cosigner - properly return hardware keystore for hardware cosigners