NS API: clamp load to offline when score is offline and add mixnet_score field to preformance_v2 (#6076)

* ns-api: when `score` is `Offline`, clamp `load` to `Offline`

* ns-api: bump version

* ns-api: add mixnet score field to performance_v2 struct

---------

Co-authored-by: Mark Sinclair <[email protected]>

Author: mmsinclair

Cargo.lock

@@ -3,7 +3,7 @@
 
 [package]
 name = "nym-node-status-api"
-version = "4.0.5"
+version = "4.0.6"
 authors.workspace = true
 repository.workspace = true
 homepage.workspace = true

nym-node-status-api/nym-node-status-api/Cargo.toml

@@ -78,6 +78,7 @@ pub struct Location {
 #[derive(Debug, Clone, Deserialize, Serialize, ToSchema, EnumString)]
 #[serde(rename_all = "snake_case")]
 #[strum(serialize_all = "snake_case")]
+#[derive(PartialEq)]
 pub enum ScoreValue {
     Offline,
     Low,
@@ -89,6 +90,7 @@ pub enum ScoreValue {
 pub struct DVpnGatewayPerformance {
     last_updated_utc: String,
     score: ScoreValue,
+    mixnet_score: ScoreValue,
     load: ScoreValue,
     uptime_percentage_last_24_hours: f32,
 }
@@ -293,10 +295,20 @@ impl DVpnGateway {
                 });
 
                 tracing::info!("🌈 gateway probe parsed: {:?}", parsed);
+                let mixnet_score = calculate_mixnet_score(&gateway);
+                let score = calculate_score(&gateway, &parsed);
+                let mut load = calculate_load(&parsed);
+
+                // clamp the load value to offline, when the score is offline
+                if score == ScoreValue::Offline {
+                    load = ScoreValue::Offline;
+                }
+
                 let performance_v2 = DVpnGatewayPerformance {
                     last_updated_utc: last_updated_utc.to_string(),
-                    load: calculate_load(&parsed),
-                    score: calculate_score(&gateway, &parsed),
+                    load,
+                    score,
+                    mixnet_score,
 
                     // the network monitor's measure is a good proxy for node uptime, it can be improved in the future
                     uptime_percentage_last_24_hours: network_monitor_performance_mixnet_mode,
@@ -353,6 +365,21 @@ impl DVpnGateway {
     }
 }
 
+/// calculates the gateway probe score for mixnet mode
+fn calculate_mixnet_score(gateway: &Gateway) -> ScoreValue {
+    let mixnet_performance = gateway.performance as f64 / 100.0;
+
+    if mixnet_performance > 0.8 {
+        ScoreValue::High
+    } else if mixnet_performance > 0.6 {
+        ScoreValue::Medium
+    } else if mixnet_performance > 0.1 {
+        ScoreValue::Low
+    } else {
+        ScoreValue::Offline
+    }
+}
+
 /// calculates a visual score for the gateway
 fn calculate_score(gateway: &Gateway, probe_outcome: &LastProbeResult) -> ScoreValue {
     let mixnet_performance = gateway.performance as f64 / 100.0;