Initial ChronoSeal release

server/src/trust.rs

@@ -0,0 +1,31 @@
+use shared::protocol::EntropyData;
+
+pub fn validate_mouse(data: &EntropyData) -> Result<(), Box<dyn std::error::Error>> {
+    let events = &data.events;
+    if events.len() < 3 {
+        return Err("few events".into());
+    }
+    let mut total_dist = 0.0;
+    let mut pauses = 0u32;
+    for i in 1..events.len() {
+        let p = &events[i-1];
+        let c = &events[i];
+        let dx = c.x - p.x;
+        let dy = c.y - p.y;
+        let dt = (c.timestamp_ms - p.timestamp_ms).max(1.0);
+        let dist = (dx*dx + dy*dy).sqrt();
+        total_dist += dist;
+        if dist < 0.2 && dt > 50.0 { pauses += 1; }
+    }
+    if total_dist < shared::constants::MIN_MOUSE_TOTAL_DIST {
+        return Err("insufficient distance".into());
+    }
+    let avg_speed = total_dist / events.len() as f64;
+    if avg_speed > shared::constants::MAX_MOUSE_AVG_SPEED {
+        return Err("speed too high".into());
+    }
+    if pauses < shared::constants::MIN_PAUSE_COUNT {
+        return Err("no pause".into());
+    }
+    Ok(())
+}