pub trait ByteUtils {
    fn get_u8(&self, index: usize) -> u8;
    fn get_u16(&self, index: usize) -> u16;
    fn get_u32(&self, index: usize) -> u32;
    fn get_u64(&self, index: usize) -> u64;
    fn get_bytes32(&self, index: usize) -> &[u8];
}

impl ByteUtils for &[u8] {
    fn get_u8(&self, index: usize) -> u8 {
        self[index]
    }
    fn get_u16(&self, index: usize) -> u16 {
        let mut bytes: [u8; 16 / 8] = [0; 16 / 8];
        bytes.copy_from_slice(&self[index..index + 2]);
        u16::from_be_bytes(bytes)
    }
    fn get_u32(&self, index: usize) -> u32 {
        let mut bytes: [u8; 32 / 8] = [0; 32 / 8];
        bytes.copy_from_slice(&self[index..index + 4]);
        u32::from_be_bytes(bytes)
    }
    fn get_u64(&self, index: usize) -> u64 {
        let mut bytes: [u8; 64 / 8] = [0; 64 / 8];
        bytes.copy_from_slice(&self[index..index + 8]);
        u64::from_be_bytes(bytes)
    }
    fn get_bytes32(&self, index: usize) -> &[u8] {
        &self[index..index + 32]
    }
}