ApplyConcurrentOperationsInTransaction takes a transaction and a list of operations and applies them using concurrency It returns an error in case any operation fails Use this function at the end of a transaction to ensure write operations are done in the end of the transaction.

CheckSubjectVerified takes a user hash and a subject hash and checks whether the user has done this subject.

InitFireStore initiates the DB Environment (requires some environment variables to work).

SetupDB wraps the Firestore initialization.

DB operation errors.

DB operation errors.

DB operation errors.

BatchObject is used for batched writes that can contain different types that implement Inserter Set Doc to empty string if you'd like to use a random Hash.

Database is passed to /server/dao functions that require DB operations.

Operation is used as a generic operation to be applied on a document It is mostly used inside transactions to provide an easy way to store operations to be executed after reads.

Inserter will be implemented by almost all entities.

Updater will be implemented by almost all entities.

Writer implements Inserter and Updater (InserterUpdater is a bad name).