Constant EXTERNAL_ARGS_BUFFER_SIZE 

pub const EXTERNAL_ARGS_BUFFER_SIZE: usize = _; // 16usize

Size of the buffer (in pointers) that is used for ExternalArgs pointers.

This constant is helpful for transaction generation to check whether a created transaction doesn’t exceed this limit.

#[slot] argument using one pointer, #[input] and #[output] use one pointer and size + capacity each.