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use std::mem::transmute;

pub trait ToBytes {
   fn to_bytes(self: Self) -> Vec<u8>;
}

impl ToBytes for u64 {
   fn to_bytes(self: Self) -> Vec<u8> {
        let slice = unsafe{transmute::<u64, [u8; 8]>(self)};
        slice.to_vec()
   }
}

pub trait FromBytes {
   fn from_bytes(_bytes: Vec<u8>) -> Self;
}

impl FromBytes for u64 {
   fn from_bytes(bytes: Vec<u8>) -> u64 {
       if bytes.len() == 8 {
           let mut slice: [u8; 8] = [0; 8];
           slice.copy_from_slice(&bytes[..]);
           unsafe{transmute::<[u8; 8], u64>(slice)}
       } else {
           0
       }
   }
}