Represents a prospective payment.

A namespace that supports both attribute-style and dict-style lookups and assignments. This is similar to a JavaScript object, hence the name

A simple container for a user's info. Accessing a non-existing attribute returns `None`.

A string with a `lang` attribute containing a lowercase BCP47 tag.

A lazy anti-CSRF token generator.

Symmetric encryption and decryption for the storage of sensitive data. We currently rely on Fernet, which was the algorithm adopted by Gratipay:

Represents an email bounce or complaint.

Represent the case where we need user confirmation during a merge. This is used in the workflow for merging one participant into another.

Registry of platforms we support.