IsTrOpened checks if the transaction is open in the context.Context.

NewTransactionManager is a factory for TrManager.

TrFromCtx returns the opened Tr from the context.Context.

WithLog sets logger for transaction.Manager.

TrManager is the implementation of transaction.Manager for sqlx.DB.

Tr is an interface to work with sqlx.DB or sqlx.Tx.

Commit completes the transaction.

Option is a type to configure TrManager.