Function test_ubigint_to_be_bits_toaltstack

bitvm/src/bigint/bits.rs:459–509

()

    #[test]
    fn test_ubigint_to_be_bits_toaltstack() {
        let mut prng = ChaCha20Rng::seed_from_u64(0);

        for _ in 0..10 {
            let a: BigUint = prng.sample(RandomBits::new(U254::N_BITS as u64));

            let mut bits = vec![];
            let mut cur = a.clone();
            for _ in 0..U254::N_BITS {
                bits.push(if cur.bit(0) { 1 } else { 0 });
                cur.shr_assign(1);
            }

            let script = script! {
                { U254::push_u32_le(&a.to_u32_digits()) }
                { U254::convert_to_be_bits_toaltstack() }
                for i in 0..U254::N_BITS {
                    OP_FROMALTSTACK
                    { bits[i as usize] }
                    OP_EQUALVERIFY
                }
                OP_TRUE
            };

            run(script);
        }

        for _ in 0..10 {
            let a: BigUint = prng.sample(RandomBits::new(U64::N_BITS as u64));

            let mut bits = vec![];
            let mut cur = a.clone();
            for _ in 0..U64::N_BITS {
                bits.push(if cur.bit(0) { 1 } else { 0 });
                cur.shr_assign(1);
            }

            let script = script! {
                { U64::push_u32_le(&a.to_u32_digits()) }
                { U64::convert_to_be_bits_toaltstack() }
                for i in 0..U64::N_BITS {
                    OP_FROMALTSTACK
                    { bits[i as usize] }
                    OP_EQUALVERIFY
                }
                OP_TRUE
            };

            run(script);
        }
    }

    #[test]
    fn test_ubigint_to_le_bits_toaltstack() {