Function block_on_current 

pub fn block_on_current<F>(
    future: F,
) -> Result<<F as Future>::Output, AsyncError>
where
    F: Future,

Polls future to completion from inside an async EVM fiber.

If future returns Poll::Pending, the current EVM fiber is suspended and the outer async EVM future returns Poll::Pending. When the executor wakes and polls the outer future again, the EVM fiber resumes and continues polling future.

Errors

Returns AsyncError::NotOnFiber if called outside async EVM execution, or AsyncError::Cancelled if the outer async EVM execution was dropped.