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 sha2::{Digest, Sha256};
20  
21  pub fn sha256(data: &[u8]) -> [u8; 32] {
22      let digest = Sha256::digest(data);
23      let mut ret = [0u8; 32];
24      ret.copy_from_slice(&digest);
25      ret
26  }
27  
28  pub fn double_sha256(data: &[u8]) -> [u8; 32] {
29      let digest = Sha256::digest(Sha256::digest(data));
30      let mut ret = [0u8; 32];
31      ret.copy_from_slice(&digest);
32      ret
33  }
34  
35  pub fn sha256d_to_u64(data: &[u8]) -> u64 {
36      let hash_slice = double_sha256(data);
37      let mut hash = [0u8; 8];
38      hash[..].copy_from_slice(&hash_slice[..8]);
39      u64::from_le_bytes(hash)
40  }