1  // Copyright (c) 2019-2025 Alpha-Delta Network Inc.
 2  // This file is part of the deltavm 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<N: Network> FromBytes for HeaderLeaf<N> {
19      /// Reads the header leaf from a buffer.
20      fn read_le<R: Read>(mut reader: R) -> IoResult<Self> {
21          // Read the index.
22          let index = FromBytes::read_le(&mut reader)?;
23          // Read the ID.
24          let id = FromBytes::read_le(&mut reader)?;
25          // Return the header leaf.
26          Ok(Self::new(index, id))
27      }
28  }
29  
30  impl<N: Network> ToBytes for HeaderLeaf<N> {
31      /// Writes the header leaf to a buffer.
32      fn write_le<W: Write>(&self, mut writer: W) -> IoResult<()> {
33          // Write the index.
34          self.index.write_le(&mut writer)?;
35          // Write the ID.
36          self.id.write_le(&mut writer)
37      }
38  }
39  
40  #[cfg(test)]
41  mod tests {
42      use super::*;
43  
44      const ITERATIONS: u64 = 1000;
45  
46      #[test]
47      fn test_bytes() -> Result<()> {
48          let mut rng = TestRng::default();
49  
50          for _ in 0..ITERATIONS {
51              // Sample the leaf.
52              let expected = test_helpers::sample_leaf(&mut rng);
53  
54              // Check the byte representation.
55              let expected_bytes = expected.to_bytes_le()?;
56              assert_eq!(expected, HeaderLeaf::read_le(&expected_bytes[..])?);
57          }
58          Ok(())
59      }
60  }