1  // Copyright (c) 2025 ADnet Contributors
  2  // This file is part of the AlphaOS 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  use alphavm::{
 19      ledger::narwhal::Data,
 20      prelude::{Field, FromBytes, ToBytes},
 21  };
 22  
 23  use std::borrow::Cow;
 24  
 25  #[derive(Clone, Debug, PartialEq, Eq)]
 26  pub struct ChallengeResponse<N: Network> {
 27      pub genesis_header: Header<N>,
 28      pub restrictions_id: Field<N>,
 29      pub signature: Data<Signature<N>>,
 30      pub nonce: u64,
 31  }
 32  
 33  impl<N: Network> MessageTrait for ChallengeResponse<N> {
 34      /// Returns the message name.
 35      #[inline]
 36      fn name(&self) -> Cow<'static, str> {
 37          "ChallengeResponse".into()
 38      }
 39  }
 40  
 41  impl<N: Network> ToBytes for ChallengeResponse<N> {
 42      fn write_le<W: io::Write>(&self, mut writer: W) -> io::Result<()> {
 43          self.genesis_header.write_le(&mut writer)?;
 44          self.restrictions_id.write_le(&mut writer)?;
 45          self.signature.write_le(&mut writer)?;
 46          self.nonce.write_le(&mut writer)
 47      }
 48  }
 49  
 50  impl<N: Network> FromBytes for ChallengeResponse<N> {
 51      fn read_le<R: io::Read>(mut reader: R) -> io::Result<Self> {
 52          Ok(Self {
 53              genesis_header: Header::read_le(&mut reader)?,
 54              restrictions_id: Field::read_le(&mut reader)?,
 55              signature: Data::read_le(&mut reader)?,
 56              nonce: u64::read_le(reader)?,
 57          })
 58      }
 59  }
 60  
 61  #[cfg(test)]
 62  pub mod prop_tests {
 63      use crate::ChallengeResponse;
 64      use alphavm::{
 65          console::prelude::{FromBytes, ToBytes},
 66          ledger::{narwhal::Data, test_helpers::sample_genesis_block},
 67          prelude::{Field, PrivateKey, Signature, block::Header},
 68          utilities::rand::{TestRng, Uniform},
 69      };
 70  
 71      use bytes::{Buf, BufMut, BytesMut};
 72      use proptest::prelude::{BoxedStrategy, Strategy, any};
 73      use test_strategy::proptest;
 74  
 75      type CurrentNetwork = alphavm::prelude::MainnetV0;
 76  
 77      pub fn any_restrictions_id() -> Field<CurrentNetwork> {
 78          Uniform::rand(&mut TestRng::default())
 79      }
 80  
 81      pub fn any_signature() -> BoxedStrategy<Signature<CurrentNetwork>> {
 82          (0..64)
 83              .prop_map(|message_size| {
 84                  let rng = &mut TestRng::default();
 85                  let message: Vec<_> = (0..message_size).map(|_| Uniform::rand(rng)).collect();
 86                  let private_key = PrivateKey::new(rng).unwrap();
 87                  Signature::sign(&private_key, &message, rng).unwrap()
 88              })
 89              .boxed()
 90      }
 91  
 92      pub fn any_genesis_header() -> BoxedStrategy<Header<CurrentNetwork>> {
 93          any::<u64>().prop_map(|seed| *sample_genesis_block(&mut TestRng::fixed(seed)).header()).boxed()
 94      }
 95  
 96      pub fn any_challenge_response() -> BoxedStrategy<ChallengeResponse<CurrentNetwork>> {
 97          (any_genesis_header(), any_signature(), any::<u64>())
 98              .prop_map(|(genesis_header, sig, nonce)| ChallengeResponse {
 99                  genesis_header,
100                  restrictions_id: any_restrictions_id(),
101                  signature: Data::Object(sig),
102                  nonce,
103              })
104              .boxed()
105      }
106  
107      #[proptest]
108      fn challenge_response_roundtrip(#[strategy(any_challenge_response())] original: ChallengeResponse<CurrentNetwork>) {
109          let mut buf = BytesMut::default().writer();
110          ChallengeResponse::write_le(&original, &mut buf).unwrap();
111  
112          let deserialized: ChallengeResponse<CurrentNetwork> =
113              ChallengeResponse::read_le(buf.into_inner().reader()).unwrap();
114  
115          assert_eq!(original.genesis_header, deserialized.genesis_header);
116          assert_eq!(
117              original.signature.deserialize_blocking().unwrap(),
118              deserialized.signature.deserialize_blocking().unwrap()
119          );
120      }
121  }