snarkvm_ledger_committee/
serialize.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
// Copyright 2024 Aleo Network Foundation
// 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<N: Network> Serialize for Committee<N> {
    /// Serializes the committee to a JSON-string or buffer.
    fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
        match serializer.is_human_readable() {
            true => {
                let mut certificate = serializer.serialize_struct("Committee", 4)?;
                certificate.serialize_field("id", &self.id)?;
                certificate.serialize_field("starting_round", &self.starting_round)?;
                certificate.serialize_field("members", &self.members)?;
                certificate.serialize_field("total_stake", &self.total_stake)?;
                certificate.end()
            }
            false => ToBytesSerializer::serialize_with_size_encoding(self, serializer),
        }
    }
}

impl<'de, N: Network> Deserialize<'de> for Committee<N> {
    /// Deserializes the committee from a JSON-string or buffer.
    fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
        match deserializer.is_human_readable() {
            true => {
                let mut value = serde_json::Value::deserialize(deserializer)?;
                let id: Field<N> = DeserializeExt::take_from_value::<D>(&mut value, "id")?;
                let total_stake: u64 = DeserializeExt::take_from_value::<D>(&mut value, "total_stake")?;
                let committee = Self::new(
                    DeserializeExt::take_from_value::<D>(&mut value, "starting_round")?,
                    DeserializeExt::take_from_value::<D>(&mut value, "members")?,
                )
                .map_err(de::Error::custom)?;

                if committee.id != id {
                    return Err(de::Error::custom("committee ID mismatch"));
                }
                match committee.total_stake == total_stake {
                    true => Ok(committee),
                    false => Err(de::Error::custom("total stake mismatch")),
                }
            }
            false => FromBytesDeserializer::<Self>::deserialize_with_size_encoding(deserializer, "committee"),
        }
    }
}

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

    fn check_serde_json<
        T: Serialize + for<'a> Deserialize<'a> + Debug + Display + PartialEq + Eq + FromStr + ToBytes + FromBytes,
    >(
        expected: T,
    ) {
        // Serialize
        let expected_string = expected.to_string();
        let candidate_string = serde_json::to_string(&expected).unwrap();
        let candidate = serde_json::from_str::<T>(&candidate_string).unwrap();
        assert_eq!(expected, candidate);
        assert_eq!(expected_string, candidate_string);
        assert_eq!(expected_string, candidate.to_string());

        // Deserialize
        assert_eq!(expected, T::from_str(&expected_string).unwrap_or_else(|_| panic!("FromStr: {expected_string}")));
        assert_eq!(expected, serde_json::from_str(&candidate_string).unwrap());
    }

    fn check_bincode<
        T: Serialize + for<'a> Deserialize<'a> + Debug + Display + PartialEq + Eq + FromStr + ToBytes + FromBytes,
    >(
        expected: T,
    ) {
        // Serialize
        let expected_bytes = expected.to_bytes_le().unwrap();
        let expected_bytes_with_size_encoding = bincode::serialize(&expected).unwrap();
        assert_eq!(&expected_bytes[..], &expected_bytes_with_size_encoding[8..]);

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

    #[test]
    fn test_serde_json() {
        let rng = &mut TestRng::default();

        for expected in crate::test_helpers::sample_committees(rng) {
            check_serde_json(expected);
        }
    }

    #[test]
    fn test_bincode() {
        let rng = &mut TestRng::default();

        for expected in crate::test_helpers::sample_committees(rng) {
            check_bincode(expected);
        }
    }
}