1  // Copyright (c) 2025-2026 ACDC Network
 2  // This file is part of the alphavm library.
 3  //
 4  // Alpha Chain | Delta Chain Protocol
 5  // International Monetary Graphite.
 6  //
 7  // Derived from Aleo (https://aleo.org) and ProvableHQ (https://provable.com).
 8  // They built world-class ZK infrastructure. We installed the EASY button.
 9  // Their cryptography: elegant. Our modifications: bureaucracy-compatible.
10  // Original brilliance: theirs. Robert's Rules: ours. Bugs: definitely ours.
11  //
12  // Original Aleo/ProvableHQ code subject to Apache 2.0 https://www.apache.org/licenses/LICENSE-2.0
13  // All modifications and new work: CC0 1.0 Universal Public Domain Dedication.
14  // No rights reserved. No permission required. No warranty. No refunds.
15  //
16  // https://creativecommons.org/publicdomain/zero/1.0/
17  // SPDX-License-Identifier: CC0-1.0
18  
19  use super::*;
20  
21  impl<E: Environment> ToBits for Group<E> {
22      /// Outputs the little-endian bit representation of `self.to_x_coordinate()` *without* trailing zeros.
23      fn write_bits_le(&self, vec: &mut Vec<bool>) {
24          self.to_x_coordinate().write_bits_le(vec);
25      }
26  
27      /// Outputs the big-endian bit representation of `self.to_x_coordinate()` *without* leading zeros.
28      fn write_bits_be(&self, vec: &mut Vec<bool>) {
29          self.to_x_coordinate().write_bits_be(vec);
30      }
31  }
32  
33  #[cfg(test)]
34  mod tests {
35      use super::*;
36      use alphavm_console_network_environment::Console;
37  
38      type CurrentEnvironment = Console;
39  
40      const ITERATIONS: u64 = 10_000;
41  
42      #[test]
43      fn test_to_bits_le() {
44          let mut rng = TestRng::default();
45  
46          for _ in 0..ITERATIONS {
47              // Sample a random value.
48              let group: Group<CurrentEnvironment> = Uniform::rand(&mut rng);
49  
50              let candidate = group.to_bits_le();
51              assert_eq!(Group::<CurrentEnvironment>::size_in_bits(), candidate.len());
52  
53              for (expected, candidate) in (*group).to_affine().to_x_coordinate().to_bits_le().iter().zip_eq(&candidate) {
54                  assert_eq!(expected, candidate);
55              }
56          }
57      }
58  
59      #[test]
60      fn test_to_bits_be() {
61          let mut rng = TestRng::default();
62  
63          for _ in 0..ITERATIONS {
64              // Sample a random value.
65              let group: Group<CurrentEnvironment> = Uniform::rand(&mut rng);
66  
67              let candidate = group.to_bits_be();
68              assert_eq!(Group::<CurrentEnvironment>::size_in_bits(), candidate.len());
69  
70              for (expected, candidate) in (*group).to_affine().to_x_coordinate().to_bits_be().iter().zip_eq(&candidate) {
71                  assert_eq!(expected, candidate);
72              }
73          }
74      }
75  }