1  // Copyright (c) 2019-2025 Alpha-Delta Network Inc.
 2  // This file is part of the deltavm 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> FromBytes for Mapping<N> {
19      /// Reads the mapping from a buffer.
20      #[inline]
21      fn read_le<R: Read>(mut reader: R) -> IoResult<Self> {
22          // Read the mapping name.
23          let name = Identifier::<N>::read_le(&mut reader)?;
24          // Read the key statement.
25          let key = FromBytes::read_le(&mut reader)?;
26          // Read the value statement.
27          let value = FromBytes::read_le(&mut reader)?;
28          // Return the new mapping.
29          Ok(Self::new(name, key, value))
30      }
31  }
32  
33  impl<N: Network> ToBytes for Mapping<N> {
34      /// Writes the mapping to a buffer.
35      #[inline]
36      fn write_le<W: Write>(&self, mut writer: W) -> IoResult<()> {
37          // Write the mapping name.
38          self.name.write_le(&mut writer)?;
39          // Write the key statement.
40          self.key.write_le(&mut writer)?;
41          // Write the value statement.
42          self.value.write_le(&mut writer)
43      }
44  }
45  
46  #[cfg(test)]
47  mod tests {
48      use super::*;
49      use console::network::MainnetV0;
50  
51      type CurrentNetwork = MainnetV0;
52  
53      #[test]
54      fn test_mapping_bytes() -> Result<()> {
55          let mapping_string = r"
56  mapping main:
57      key as field.public;
58      value as field.public;";
59  
60          let expected = Mapping::<CurrentNetwork>::from_str(mapping_string)?;
61          let expected_bytes = expected.to_bytes_le()?;
62          println!("String size: {:?}, Bytecode size: {:?}", mapping_string.len(), expected_bytes.len());
63  
64          let candidate = Mapping::<CurrentNetwork>::from_bytes_le(&expected_bytes)?;
65          assert_eq!(expected.to_string(), candidate.to_string());
66          assert_eq!(expected_bytes, candidate.to_bytes_le()?);
67          Ok(())
68      }
69  }