1  // Copyright (c) 2019-2025 Alpha-Delta Network Inc.
 2  // This file is part of the alphavm 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<N: Network, Private: Visibility> FromBytes for Entry<N, Private> {
19      /// Reads the entry from a buffer.
20      fn read_le<R: Read>(mut reader: R) -> IoResult<Self> {
21          // Read the index.
22          let index = u8::read_le(&mut reader)?;
23          // Read the entry.
24          let entry = match index {
25              0 => Self::Constant(Plaintext::read_le(&mut reader)?),
26              1 => Self::Public(Plaintext::read_le(&mut reader)?),
27              2 => Self::Private(Private::read_le(&mut reader)?),
28              3.. => return Err(error(format!("Failed to decode entry variant {index}"))),
29          };
30          Ok(entry)
31      }
32  }
33  
34  impl<N: Network, Private: Visibility> ToBytes for Entry<N, Private> {
35      /// Writes the entry to a buffer.
36      fn write_le<W: Write>(&self, mut writer: W) -> IoResult<()> {
37          match self {
38              Self::Constant(plaintext) => {
39                  0u8.write_le(&mut writer)?;
40                  plaintext.write_le(&mut writer)
41              }
42              Self::Public(plaintext) => {
43                  1u8.write_le(&mut writer)?;
44                  plaintext.write_le(&mut writer)
45              }
46              Self::Private(private) => {
47                  2u8.write_le(&mut writer)?;
48                  private.write_le(&mut writer)
49              }
50          }
51      }
52  }