snarkvm-console-algorithms 4.6.1

// Copyright (c) 2019-2026 Provable Inc.
// This file is part of the snarkVM library.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:

// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use super::*;

impl Serialize for ECDSASignature {
    /// Serializes the signature into string or bytes.
    fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
        match serializer.is_human_readable() {
            true => serializer.collect_str(self),
            false => ToBytesSerializer::serialize_with_size_encoding(self, serializer),
        }
    }
}

impl<'de> Deserialize<'de> for ECDSASignature {
    /// Deserializes the signature from a string or bytes.
    fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
        match deserializer.is_human_readable() {
            true => FromStr::from_str(&String::deserialize(deserializer)?).map_err(de::Error::custom),
            false => FromBytesDeserializer::<Self>::deserialize_with_size_encoding(deserializer, "ecdsa_signature"),
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    const ITERATIONS: usize = 1000;

    #[test]
    fn test_serde_json() -> Result<()> {
        let mut rng = TestRng::default();
        let hasher = test_helpers::DefaultHasher::default();

        for i in 0..ITERATIONS {
            // Sample a new signature.
            let (_, _, expected) = test_helpers::sample_ecdsa_signature(i, &hasher, &mut rng);

            // Serialize
            let expected_string = &expected.to_string();
            let candidate_string = serde_json::to_string(&expected)?;
            assert_eq!(expected_string, serde_json::Value::from_str(&candidate_string)?.as_str().unwrap());

            // Deserialize
            assert_eq!(expected, ECDSASignature::from_str(expected_string)?);
            assert_eq!(expected, serde_json::from_str(&candidate_string)?);
        }
        Ok(())
    }

    #[test]
    fn test_bincode() -> Result<()> {
        let mut rng = TestRng::default();
        let hasher = test_helpers::DefaultHasher::default();

        for i in 0..ITERATIONS {
            // Sample a new signature.
            let (_, _, expected) = test_helpers::sample_ecdsa_signature(i, &hasher, &mut rng);

            // Serialize
            let expected_bytes = expected.to_bytes_le()?;
            let expected_bytes_with_size_encoding = bincode::serialize(&expected)?;
            assert_eq!(&expected_bytes[..], &expected_bytes_with_size_encoding[8..]);

            // Deserialize
            assert_eq!(expected, ECDSASignature::read_le(&expected_bytes[..])?);
            assert_eq!(expected, bincode::deserialize(&expected_bytes_with_size_encoding[..])?);
        }
        Ok(())
    }
}