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<A: Alpha> ToFields for Record<A, Plaintext<A>> {
19      type Field = Field<A>;
20  
21      /// Returns this record as a list of field elements.
22      fn to_fields(&self) -> Vec<Self::Field> {
23          // Encode the data as little-endian bits.
24          let mut bits_le = self.to_bits_le();
25          // Adds one final bit to the data, to serve as a terminus indicator.
26          // During decryption, this final bit ensures we've reached the end.
27          bits_le.push(Boolean::constant(true));
28          // Pack the bits into field elements.
29          let fields = bits_le.chunks(A::BaseField::size_in_data_bits()).map(Field::from_bits_le).collect::<Vec<_>>();
30          // Ensure the number of field elements does not exceed the maximum allowed size.
31          match fields.len() <= A::MAX_DATA_SIZE_IN_FIELDS as usize {
32              true => fields,
33              false => A::halt("Record<Plaintext> exceeds maximum allowed size"),
34          }
35      }
36  }
37  
38  impl<A: Alpha> ToFields for Record<A, Ciphertext<A>> {
39      type Field = Field<A>;
40  
41      /// Returns this record as a list of field elements.
42      fn to_fields(&self) -> Vec<Self::Field> {
43          // Encode the data as little-endian bits.
44          let mut bits_le = self.to_bits_le();
45          // Adds one final bit to the data, to serve as a terminus indicator.
46          // During decryption, this final bit ensures we've reached the end.
47          bits_le.push(Boolean::constant(true));
48          // Pack the bits into field elements.
49          let fields = bits_le.chunks(A::BaseField::size_in_data_bits()).map(Field::from_bits_le).collect::<Vec<_>>();
50          // Ensure the number of field elements does not exceed the maximum allowed size.
51          match fields.len() <= A::MAX_DATA_SIZE_IN_FIELDS as usize {
52              true => fields,
53              false => A::halt("Record<Ciphertext> exceeds maximum allowed size"),
54          }
55      }
56  }