/ circuit / types / boolean / src / helpers / bits_are_zero.rs
bits_are_zero.rs
 1  // Copyright (c) 2019-2025 Alpha-Delta Network Inc.
 2  // This file is part of the alphavm library.
 3  
 4  // Licensed under the Apache License, Version 2.0 (the "License");
 5  // you may not use this file except in compliance with the License.
 6  // You may obtain a copy of the License at:
 7  
 8  // http://www.apache.org/licenses/LICENSE-2.0
 9  
10  // Unless required by applicable law or agreed to in writing, software
11  // distributed under the License is distributed on an "AS IS" BASIS,
12  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  // See the License for the specific language governing permissions and
14  // limitations under the License.
15  
16  use super::*;
17  
18  impl<E: Environment> Boolean<E> {
19      /// Asserts that all bits in `bits_le` are zero.
20      #[doc(hidden)]
21      pub fn assert_bits_are_zero(bits_le: &[Boolean<E>]) {
22          let mut sum = Self::constant(false).0;
23          for bit in bits_le {
24              sum += &**bit;
25          }
26          E::assert_eq(sum, E::zero());
27      }
28  }