snarkvm_console_program/data/access/
bytes.rs

1// Copyright 2024-2025 Aleo Network Foundation
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 Access<N> {
19    /// Reads the access from a buffer.
20    fn read_le<R: Read>(mut reader: R) -> IoResult<Self> {
21        let variant = u8::read_le(&mut reader)?;
22        match variant {
23            0 => Ok(Self::Member(Identifier::read_le(&mut reader)?)),
24            1 => Ok(Self::Index(U32::read_le(&mut reader)?)),
25            2.. => Err(error(format!("Failed to deserialize access variant {variant}"))),
26        }
27    }
28}
29
30impl<N: Network> ToBytes for Access<N> {
31    /// Write the access to a buffer.
32    fn write_le<W: Write>(&self, mut writer: W) -> IoResult<()> {
33        match self {
34            Access::Member(identifier) => {
35                0u8.write_le(&mut writer)?;
36                identifier.write_le(&mut writer)
37            }
38            Access::Index(index) => {
39                1u8.write_le(&mut writer)?;
40                index.write_le(&mut writer)
41            }
42        }
43    }
44}
45
46#[cfg(test)]
47mod tests {
48    use super::*;
49    use crate::data::identifier::tests::sample_identifier;
50    use snarkvm_console_network::MainnetV0;
51
52    type CurrentNetwork = MainnetV0;
53
54    const ITERATIONS: u32 = 1000;
55
56    fn check_bytes(expected: Access<CurrentNetwork>) -> Result<()> {
57        // Check the byte representation.
58        let expected_bytes = expected.to_bytes_le()?;
59        assert_eq!(expected, Access::read_le(&expected_bytes[..])?);
60        Ok(())
61    }
62
63    #[test]
64    fn test_bytes() -> Result<()> {
65        let rng = &mut TestRng::default();
66
67        for _ in 0..ITERATIONS {
68            // Member
69            let identifier = sample_identifier(rng)?;
70            check_bytes(Access::Member(identifier))?;
71
72            // Index
73            let index = U32::<CurrentNetwork>::rand(rng);
74            check_bytes(Access::Index(index))?;
75        }
76        Ok(())
77    }
78}
snarkvm_console_program/data/access/bytes.rs

snarkvm_console_program/data/access/
bytes.rs
