qualia_core_db/
qubo_compiler.rs

1//! QUBO (Quadratic Unconstrained Binary Optimization) compiler for quantum annealing.
2
3use crate::NQuin;
4
5pub const MAX_QUBO_VARS: usize = 128;
6
7/// QUBO matrix representation for quantum annealing
8#[derive(Debug, Clone)]
9pub struct QuboMatrix {
10    /// Linear terms (diagonal)
11    pub linear: Vec<f64>,
12    /// Quadratic terms (off-diagonal)
13    pub quadratic: Vec<(usize, usize, f64)>,
14    /// Number of variables
15    pub num_vars: usize,
16    /// Number of couplers
17    pub coupler_count: usize,
18    /// Coupler connections
19    pub couplers: Vec<Coupler>,
20    /// Index map for variable mapping
21    pub index_map: Vec<(u64, u64)>,
22    /// Index count
23    pub index_count: usize,
24}
25
26/// Coupler connection with weights
27#[derive(Debug, Clone)]
28pub struct Coupler {
29    pub var_a: usize,
30    pub var_b: usize,
31    pub weight: f64,
32}
33
34impl Default for QuboMatrix {
35    fn default() -> Self {
36        Self::new(MAX_QUBO_VARS)
37    }
38}
39
40impl QuboMatrix {
41    /// Create a new QUBO matrix
42    pub fn new(num_vars: usize) -> Self {
43        Self {
44            linear: vec![0.0; num_vars],
45            quadratic: Vec::new(),
46            num_vars,
47            coupler_count: 0,
48            couplers: Vec::new(),
49            index_map: vec![(0, 0); num_vars],
50            index_count: 0,
51        }
52    }
53
54    /// Set a linear term
55    pub fn set_linear(&mut self, var: usize, value: f64) {
56        if var < self.linear.len() {
57            self.linear[var] = value;
58        }
59    }
60
61    /// Set a quadratic term
62    pub fn set_quadratic(&mut self, var1: usize, var2: usize, value: f64) {
63        if var1 < self.linear.len() && var2 < self.linear.len() {
64            self.coupler_count += 1;
65            self.couplers.push(Coupler {
66                var_a: var1,
67                var_b: var2,
68                weight: value,
69            });
70            self.quadratic.push((var1, var2, value));
71        }
72    }
73
74    /// Emit a coupler
75    pub fn emit_coupler(&mut self, var_a: usize, var_b: usize, weight: f64) {
76        self.couplers.push(Coupler {
77            var_a,
78            var_b,
79            weight,
80        });
81        self.coupler_count += 1;
82    }
83}
84
85/// Classical QUBO solver (placeholder - actual implementation would use simulated annealing or other algorithms)
86pub fn solve_classical(matrix: &QuboMatrix, assignment: &mut [u8]) -> f32 {
87    // Placeholder: simple greedy assignment
88    let mut energy = 0.0f32;
89    for i in 0..matrix.num_vars.min(assignment.len()) {
90        assignment[i] = if matrix.linear[i] > 0.0 { 0 } else { 1 };
91        energy += matrix.linear[i] as f32 * assignment[i] as f32;
92    }
93    energy
94}
95
96/// Compile Quins to QUBO matrix (placeholder)
97pub fn compile_quins_to_qubo(quins: &[NQuin], matrix: &mut QuboMatrix) -> Result<(), String> {
98    // Placeholder: simple conversion
99    for quin in quins.iter().take(MAX_QUBO_VARS) {
100        let var = quin.object as usize % MAX_QUBO_VARS;
101        matrix.set_linear(var, quin.predicate as f64);
102    }
103    Ok(())
104}
105
106/// Rehydrate solution from assignment (placeholder)
107pub fn rehydrate_solution(matrix: &mut QuboMatrix, assignment: &[u8], out: &mut [NQuin]) -> usize {
108    // Placeholder: simple conversion
109    let mut count = 0;
110    for (i, &val) in assignment.iter().enumerate().take(out.len()) {
111        if i < matrix.num_vars {
112            out[count] = NQuin {
113                subject: i as u64,
114                predicate: val as u64,
115                object: 0,
116                context: 0,
117                metadata: 0,
118                parity: 0,
119            };
120            count += 1;
121        }
122    }
123    count
124}
125
126/// Scrub personal URIs from index_map to ensure no personal data leaks
127pub fn scrub_metadata(matrix: &mut QuboMatrix) {
128    matrix.index_map.clear();
129    matrix.index_count = 0;
130}
131
132/// Serialize QuboMatrix to multi-dimensional HDF5-like format
133pub fn serialize_matrix(matrix: &QuboMatrix) -> Vec<u8> {
134    let mut bytes = Vec::new();
135    bytes.extend_from_slice(b"HDF5_Q42_MAGIC");
136    bytes.extend_from_slice(&(matrix.num_vars as u64).to_le_bytes());
137    bytes.extend_from_slice(&(matrix.coupler_count as u64).to_le_bytes());
138    for &val in &matrix.linear {
139        bytes.extend_from_slice(&val.to_le_bytes());
140    }
141    for coupler in &matrix.couplers {
142        bytes.extend_from_slice(&(coupler.var_a as u64).to_le_bytes());
143        bytes.extend_from_slice(&(coupler.var_b as u64).to_le_bytes());
144        bytes.extend_from_slice(&coupler.weight.to_le_bytes());
145    }
146    bytes
147}
148
149/// Publish a solved matrix to the WebTorrent Commons
150#[cfg(not(target_arch = "wasm32"))]
151pub fn publish_to_commons(
152    matrix: &mut QuboMatrix,
153    storage_path: &std::path::Path,
154) -> Result<String, String> {
155    scrub_metadata(matrix);
156    let bytes = serialize_matrix(matrix);
157
158    let commons_dir = storage_path.join("commons");
159    std::fs::create_dir_all(&commons_dir).map_err(|e| e.to_string())?;
160
161    let file_path = commons_dir.join("quantum_cache.q42");
162    std::fs::write(&file_path, bytes).map_err(|e| e.to_string())?;
163
164    let info_hash = crate::webtorrent_seeder::sha1_file(&file_path)?;
165    let req = crate::webtorrent_seeder::RegisterSeedRequest {
166        info_hash: info_hash.clone(),
167        file_path: file_path.to_str().unwrap().to_string(),
168        display_name: "quantum_cache.q42".to_string(),
169        ontology_id: "quantum_commons".to_string(),
170        bandwidth_limit_kbps: 1024,
171        commons_asserted: true,
172    };
173
174    // Check if there is an existing seed and deprecate it
175    if let Some(_existing) = crate::webtorrent_seeder::lookup_seed(&info_hash) {
176        crate::webtorrent_seeder::deprecate_seed(&info_hash);
177    }
178
179    crate::webtorrent_seeder::register_seed(req)?;
180    Ok(crate::webtorrent_seeder::build_magnet_uri(
181        &info_hash,
182        "quantum_cache.q42",
183        4242,
184    ))
185}
186
187#[cfg(test)]
188mod tests {
189    use super::*;
190
191    #[test]
192    fn test_rigorous_metadata_scrubbing() {
193        let mut matrix = QuboMatrix::new(2);
194        // Inject mock personal URI data
195        matrix.index_map.push((12345, 67890));
196        matrix.index_count = 1;
197
198        // Scrub
199        scrub_metadata(&mut matrix);
200
201        // Assert no traces of personal URIs
202        assert_eq!(matrix.index_count, 0);
203        assert!(
204            matrix.index_map.is_empty(),
205            "Index map was not fully scrubbed!"
206        );
207    }
208}
qualia_core_db/qubo_compiler.rs

qualia_core_db/
qubo_compiler.rs
