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  use deltavm_utilities::DeserializeExt;
19  
20  impl<N: Network> Serialize for HeaderLeaf<N> {
21      /// Serializes the leaf into string or bytes.
22      fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
23          match serializer.is_human_readable() {
24              true => {
25                  let mut leaf = serializer.serialize_struct("HeaderLeaf", 2)?;
26                  leaf.serialize_field("index", &self.index)?;
27                  leaf.serialize_field("id", &self.id)?;
28                  leaf.end()
29              }
30              false => ToBytesSerializer::serialize_with_size_encoding(self, serializer),
31          }
32      }
33  }
34  
35  impl<'de, N: Network> Deserialize<'de> for HeaderLeaf<N> {
36      /// Deserializes the leaf from a string or bytes.
37      fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
38          match deserializer.is_human_readable() {
39              true => {
40                  // Parse the leaf from a string into a value.
41                  let mut leaf = serde_json::Value::deserialize(deserializer)?;
42                  // Recover the leaf.
43                  Ok(Self::new(
44                      // Retrieve the index.
45                      DeserializeExt::take_from_value::<D>(&mut leaf, "index")?,
46                      // Retrieve the id.
47                      DeserializeExt::take_from_value::<D>(&mut leaf, "id")?,
48                  ))
49              }
50              false => FromBytesDeserializer::<Self>::deserialize_with_size_encoding(deserializer, "header leaf"),
51          }
52      }
53  }
54  
55  #[cfg(test)]
56  mod tests {
57      use super::*;
58  
59      #[test]
60      fn test_serde_json() -> Result<()> {
61          let mut rng = TestRng::default();
62  
63          // Sample the leaf.
64          let expected = test_helpers::sample_leaf(&mut rng);
65  
66          // Serialize
67          let expected_string = &expected.to_string();
68          let candidate_string = serde_json::to_string(&expected)?;
69          assert_eq!(expected, serde_json::from_str(&candidate_string)?);
70  
71          // Deserialize
72          assert_eq!(expected, HeaderLeaf::from_str(expected_string)?);
73          assert_eq!(expected, serde_json::from_str(&candidate_string)?);
74  
75          Ok(())
76      }
77  
78      #[test]
79      fn test_bincode() -> Result<()> {
80          let mut rng = TestRng::default();
81  
82          // Sample the leaf.
83          let expected = test_helpers::sample_leaf(&mut rng);
84  
85          // Serialize
86          let expected_bytes = expected.to_bytes_le()?;
87          let expected_bytes_with_size_encoding = bincode::serialize(&expected)?;
88          assert_eq!(&expected_bytes[..], &expected_bytes_with_size_encoding[8..]);
89  
90          // Deserialize
91          assert_eq!(expected, HeaderLeaf::read_le(&expected_bytes[..])?);
92          assert_eq!(expected, bincode::deserialize(&expected_bytes_with_size_encoding[..])?);
93  
94          Ok(())
95      }
96  }