Function signed_checksum

bitvm/src/signatures/winternitz.rs:1045–1051

(ps: &Parameters, message_digits: &[i32])

        assert_eq!(ps.checksum_digit_len, 2);

        fn signed_checksum(ps: &Parameters, message_digits: &[i32]) -> u32 {
            debug_assert_eq!(message_digits.len(), ps.message_digit_len as usize);

            let sum: i32 = message_digits.iter().sum();
            assert!(sum >= 0);
            ps.max_digit() * ps.message_digit_len - sum as u32
        }

        fn add_message_signed_checksum(ps: &Parameters, mut message_digits: Vec<i32>) -> Vec<i32> {
            debug_assert_eq!(message_digits.len(), ps.message_digit_len as usize);