How to convert `BlockNumber` to `u64`?

Question

For example, if a have a variable of type <T as frame_system::Config>::BlockNumber how could I convert it into a u64, simply putting u64::from doesn't work.

Answer 1

use sp_runtime::traits::SaturatedConversion;


fn f(block_number: BlockNumber) {
    block_number.saturated_into::<u64>();
}