Function btck_block_create 

pub unsafe extern "C" fn btck_block_create(
    raw_block: *const c_void,
    raw_block_len: usize,
) -> *mut btck_Block

@brief Parse a serialized raw block into a new block object.

@param[in] raw_block Serialized block. @param[in] raw_block_len Length of the serialized block. @return The allocated block, or null on error.