Function checksum

bitvm/src/signatures/winternitz.rs:114–119

Computes the checksum for the given message.

(ps: &Parameters, message_digits: &[u32])

/// Computes the checksum for the given message.
fn checksum(ps: &Parameters, message_digits: &[u32]) -> u32 {
    debug_assert_eq!(message_digits.len(), ps.message_digit_len as usize);

    let sum: u32 = message_digits.iter().sum();
    ps.max_digit() * ps.message_digit_len - sum
}

/// Appends the checksum to the end of the message.
fn add_message_checksum(ps: &Parameters, mut message_digits: Vec<u32>) -> Vec<u32> {