Function ethash::hashimoto

pub fn hashimoto<F: Fn(usize) -> [u8; 64]>(
    header: &[u8], 
    nonce: u64, 
    full_size: usize, 
    lookup: F
) -> ([u8; 128], [u8; 32])

"Main" function of Ethash, calculating the mix digest and result given the header and nonce.