AppName is the name of the application.

Codec is an interface for serialization and deserialization.

ConfigAccessor builds upon the ConfigUnmarshaler and provides a richer set of API.

ConfigRouter enables modular configuration by giving every piece of configuration a path.

ConfigUnmarshaler is a minimum config interface that can be used to retrieve configuration from external system.

ConfigWatcher is an interface for hot-reload provider.

Container holds modules.

DIPopulator is an interface that models a container to which users can fetch dependencies.

Env is the interface for environment of the application.

HttpDoer is the interface for a http client.

Keyer is an interface for key passing.

LevelLogger is plaintext logger with level.

A Printer models a i18n translator.

Logger is an alias of go kit logger.