Yes, it works for files, network connections and database transactions[1]. To span a transaction over two functions, it has to be assigned to some variable and

Yes, it works for files, network connections and database transactions[1]. To span a transaction over two functions, it has to be assigned to some variable and the lifetime of this variable is tracked by the compiler. [1] https://docs.rs/sqlx/0.3.0/sqlx/struct.Transaction.html https://docs.rs/sqlx/0.3.0/sqlx/struct.Transaction.html