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> FromStr for Solution<N> {
19      type Err = Error;
20  
21      /// Initializes the solution from a JSON-string.
22      fn from_str(solution: &str) -> Result<Self, Self::Err> {
23          Ok(serde_json::from_str(solution)?)
24      }
25  }
26  
27  impl<N: Network> Debug for Solution<N> {
28      /// Prints the solution as a JSON-string.
29      fn fmt(&self, f: &mut Formatter) -> fmt::Result {
30          Display::fmt(self, f)
31      }
32  }
33  
34  impl<N: Network> Display for Solution<N> {
35      /// Displays the solution as a JSON-string.
36      fn fmt(&self, f: &mut Formatter) -> fmt::Result {
37          write!(f, "{}", serde_json::to_string(self).map_err::<fmt::Error, _>(ser::Error::custom)?)
38      }
39  }
40  
41  #[cfg(test)]
42  mod tests {
43      use super::*;
44      use console::{account::PrivateKey, network::MainnetV0};
45  
46      type CurrentNetwork = MainnetV0;
47  
48      #[test]
49      fn test_string() -> Result<()> {
50          let mut rng = TestRng::default();
51          let private_key = PrivateKey::<CurrentNetwork>::new(&mut rng)?;
52          let address = Address::try_from(private_key)?;
53  
54          // Sample a new solution.
55          let partial_solution = PartialSolution::new(rng.r#gen(), address, u64::rand(&mut rng)).unwrap();
56          let target = u64::rand(&mut rng);
57          let expected = Solution::new(partial_solution, target);
58  
59          // Check the string representation.
60          let candidate = expected.to_string();
61          assert_eq!(expected, Solution::from_str(&candidate)?);
62  
63          Ok(())
64      }
65  }