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 Serialize for ECDSASignature {
19      /// Serializes the signature into string or bytes.
20      fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
21          match serializer.is_human_readable() {
22              true => serializer.collect_str(self),
23              false => ToBytesSerializer::serialize_with_size_encoding(self, serializer),
24          }
25      }
26  }
27  
28  impl<'de> Deserialize<'de> for ECDSASignature {
29      /// Deserializes the signature from a string or bytes.
30      fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
31          match deserializer.is_human_readable() {
32              true => FromStr::from_str(&String::deserialize(deserializer)?).map_err(de::Error::custom),
33              false => FromBytesDeserializer::<Self>::deserialize_with_size_encoding(deserializer, "ecdsa_signature"),
34          }
35      }
36  }
37  
38  #[cfg(test)]
39  mod tests {
40      use super::*;
41  
42      const ITERATIONS: usize = 1000;
43  
44      #[test]
45      fn test_serde_json() -> Result<()> {
46          let mut rng = TestRng::default();
47          let hasher = test_helpers::DefaultHasher::default();
48  
49          for i in 0..ITERATIONS {
50              // Sample a new signature.
51              let (_, _, expected) = test_helpers::sample_ecdsa_signature(i, &hasher, &mut rng);
52  
53              // Serialize
54              let expected_string = &expected.to_string();
55              let candidate_string = serde_json::to_string(&expected)?;
56              assert_eq!(expected_string, serde_json::Value::from_str(&candidate_string)?.as_str().unwrap());
57  
58              // Deserialize
59              assert_eq!(expected, ECDSASignature::from_str(expected_string)?);
60              assert_eq!(expected, serde_json::from_str(&candidate_string)?);
61          }
62          Ok(())
63      }
64  
65      #[test]
66      fn test_bincode() -> Result<()> {
67          let mut rng = TestRng::default();
68          let hasher = test_helpers::DefaultHasher::default();
69  
70          for i in 0..ITERATIONS {
71              // Sample a new signature.
72              let (_, _, expected) = test_helpers::sample_ecdsa_signature(i, &hasher, &mut rng);
73  
74              // Serialize
75              let expected_bytes = expected.to_bytes_le()?;
76              let expected_bytes_with_size_encoding = bincode::serialize(&expected)?;
77              assert_eq!(&expected_bytes[..], &expected_bytes_with_size_encoding[8..]);
78  
79              // Deserialize
80              assert_eq!(expected, ECDSASignature::read_le(&expected_bytes[..])?);
81              assert_eq!(expected, bincode::deserialize(&expected_bytes_with_size_encoding[..])?);
82          }
83          Ok(())
84      }
85  }