snarkvm_ledger_block/header/metadata/
to_bits.rs

1// Copyright (c) 2019-2025 Provable Inc.
2// This file is part of the snarkVM 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
16use super::*;
17
18impl<N: Network> ToBits for Metadata<N> {
19    /// Returns the little-endian bits of the metadata.
20    #[rustfmt::skip]
21    fn write_bits_le(&self, vec: &mut Vec<bool>) {
22        0u8.write_bits_le(vec);                               // 1 byte
23        self.network.write_bits_le(vec);                      // 2 bytes
24        self.round.write_bits_le(vec);                        // 8 bytes
25        self.height.write_bits_le(vec);                       // 4 bytes
26        self.cumulative_weight.write_bits_le(vec);            // 16 bytes
27        self.cumulative_proof_target.write_bits_le(vec);      // 16 bytes
28        self.coinbase_target.write_bits_le(vec);              // 8 bytes
29        self.proof_target.write_bits_le(vec);                 // 8 bytes
30        self.last_coinbase_target.write_bits_le(vec);         // 8 bytes
31        self.last_coinbase_timestamp.write_bits_le(vec);      // 8 bytes
32        self.timestamp.write_bits_le(vec);                    // 8 bytes
33    }
34
35    /// Returns the big-endian bits of the metadata.
36    #[rustfmt::skip]
37    fn write_bits_be(&self, vec: &mut Vec<bool>) {
38        0u8.write_bits_be(vec);                               // 1 byte
39        self.network.write_bits_be(vec);                      // 2 bytes
40        self.round.write_bits_be(vec);                        // 8 bytes
41        self.height.write_bits_be(vec);                       // 4 bytes
42        self.cumulative_weight.write_bits_be(vec);            // 16 bytes
43        self.cumulative_proof_target.write_bits_be(vec);      // 16 bytes
44        self.coinbase_target.write_bits_be(vec);              // 8 bytes
45        self.proof_target.write_bits_be(vec);                 // 8 bytes
46        self.last_coinbase_target.write_bits_be(vec);         // 8 bytes
47        self.last_coinbase_timestamp.write_bits_be(vec);      // 8 bytes
48        self.timestamp.write_bits_be(vec);                    // 8 bytes
49    }
50}
51
52#[cfg(test)]
53mod tests {
54    use super::*;
55
56    #[test]
57    fn test_bits_le() {
58        let rng = &mut TestRng::default();
59
60        for expected in [crate::header::metadata::test_helpers::sample_block_metadata(rng)].into_iter() {
61            // Check the length matches.
62            let expected_bytes = expected.to_bytes_le().unwrap();
63            let expected_bits = expected.to_bits_le();
64            assert_eq!(expected_bytes.to_bits_le().len(), expected_bits.len());
65        }
66    }
67
68    #[test]
69    fn test_bits_be() {
70        let rng = &mut TestRng::default();
71
72        for expected in [crate::header::metadata::test_helpers::sample_block_metadata(rng)].into_iter() {
73            // Check the length matches.
74            let expected_bytes = expected.to_bytes_le().unwrap(); // There is no 'to_bytes_be' function.
75            let expected_bits = expected.to_bits_be();
76            assert_eq!(expected_bytes.to_bits_be().len(), expected_bits.len());
77        }
78    }
79}
snarkvm_ledger_block/header/metadata/to_bits.rs

snarkvm_ledger_block/header/metadata/
to_bits.rs
