snarkvm_ledger_block/solutions/
bytes.rs

1// Copyright (c) 2019-2025 Provable Inc.
2// This file is part of the snarkVM 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
16use super::*;
17
18impl<N: Network> FromBytes for Solutions<N> {
19    /// Reads the solutions from the buffer.
20    fn read_le<R: Read>(mut reader: R) -> IoResult<Self> {
21        // Read the version.
22        let version: u8 = FromBytes::read_le(&mut reader)?;
23        // Ensure the version is valid.
24        if version != 1 {
25            return Err(error(format!("Invalid solutions version ({version})")));
26        }
27
28        // Read the variant.
29        let variant: u8 = FromBytes::read_le(&mut reader)?;
30        // Parse the variant.
31        match variant {
32            0 => {
33                // Return the solutions.
34                Ok(Self { solutions: None })
35            }
36            1 => {
37                // Read the solutions.
38                let solutions: PuzzleSolutions<N> = FromBytes::read_le(&mut reader)?;
39                // Return the solutions.
40                Self::new(solutions).map_err(error)
41            }
42            _ => Err(error(format!("Invalid solutions variant ({variant})"))),
43        }
44    }
45}
46
47impl<N: Network> ToBytes for Solutions<N> {
48    /// Writes the solutions to the buffer.
49    fn write_le<W: Write>(&self, mut writer: W) -> IoResult<()> {
50        // Write the version.
51        1u8.write_le(&mut writer)?;
52
53        match &self.solutions {
54            None => {
55                // Write the variant.
56                0u8.write_le(&mut writer)?;
57            }
58            Some(solutions) => {
59                // Write the variant.
60                1u8.write_le(&mut writer)?;
61                // Write the solutions.
62                solutions.write_le(&mut writer)?;
63            }
64        }
65        Ok(())
66    }
67}
68
69#[cfg(test)]
70mod tests {
71    use super::*;
72
73    #[test]
74    fn test_bytes() -> Result<()> {
75        let mut rng = TestRng::default();
76
77        // Sample random solutions.
78        let expected = crate::solutions::serialize::tests::sample_solutions(&mut rng);
79
80        // Check the byte representation.
81        let expected_bytes = expected.to_bytes_le()?;
82        assert_eq!(expected, Solutions::read_le(&expected_bytes[..])?);
83        Ok(())
84    }
85}
snarkvm_ledger_block/solutions/bytes.rs

snarkvm_ledger_block/solutions/
bytes.rs
