Module registration 

The ledger row itself: creating it and reading it back whole.

Structs

CreditRegistration

NewCreditRegistration

Functions

exists_for_user_and_course

Whether this account has any attempt, live or replaced, on this course.

get_by_course_id

get_by_id

get_by_ids_for_update

The named rows, locked until the caller’s transaction ends. Must be called inside one.

get_by_user_id

insert

Creates a ledger row at pending with a created event.

is_waiting_for_enrolment

Whether a row is waiting for an enrolment: parked without a usable one, check schedule started or not, or on its first check or a retry on its way there. Only such a row is moved by a visit or a check request, and kept waiting through a lookup that fails in transit.