Exists returns the Item with counter fields if it exists by requested key.

GCMonitor is garbage collection monitoring to delete expired by date or counter items.

InTransaction runs method `f` inside the database transaction and does commit or rollback.

Read reads an item by its key from the database.

decryption flags.

decryption flags.

decryption flags.

ErrDecrement is an error when decrement was failed.

ErrNoAttempts is an error when there are no attempts to read some data.

Item is base data struct for incoming data.

DecryptFlag is a type for decryption flags.