Function maximum_number_of_altstack_elements_using_blake3

bitvm/src/hash/blake3.rs:290–295

Calculates the maximum number of altstack elements one can have using the [`blake3_compute_script`] function with the following formula: ```text n (number of blocks) = ⌈msg_len / 64⌉ limb_count (number of limbs in a block) = ⌈256 / limb_len⌉ * 2 m (message's consumption of stack during BLAKE3) = (n - 1) * limb_count Since BLAKE3 requires an empty stack and we've calculated the usage for the messag

(message_len: usize, limb_len: u8)

///  MAX_NUMBEROF_ALTSTACK_ELEMENTS = 1000 (max stack limit) - m - 644 (Maximum number of elements used during BLAKE3)
/// ```
pub fn maximum_number_of_altstack_elements_using_blake3(message_len: usize, limb_len: u8) -> i32 {
    let n = message_len.div_ceil(64);
    let limb_count = 256usize.div_ceil(limb_len as usize) * 2;
    let m = (n - 1) * limb_count;
    1000_i32 - MAX_BLAKE3_ELEMENT_COUNT as i32 - m as i32
}

/// Returns a script that computes the BLAKE3 hash of the message on the stack.
///