implement issue #388: Change app-facing default to Sequencing::PreferOrdered

veilid-core/src/routing_table/bucket_entry.rs

@@ -268,17 +268,7 @@ impl BucketEntryInner {
         }
 
         // Lower latency to the front
-        if let Some(e1_latency) = &e1.peer_stats.latency {
+        Self::cmp_fastest(e1, e2)
-            if let Some(e2_latency) = &e2.peer_stats.latency {
-                e1_latency.average.cmp(&e2_latency.average)
-            } else {
-                std::cmp::Ordering::Less
-            }
-        } else if e2.peer_stats.latency.is_some() {
-            std::cmp::Ordering::Greater
-        } else {
-            std::cmp::Ordering::Equal
-        }
     }
 
     // Less is more reliable then older
@@ -290,6 +280,7 @@ impl BucketEntryInner {
         }
 
         // Lower timestamp to the front, recent or no timestamp is at the end
+        // First check consecutive-ping reliability timestamp
         if let Some(e1_ts) = &e1.peer_stats.rpc_stats.first_consecutive_seen_ts {
             if let Some(e2_ts) = &e2.peer_stats.rpc_stats.first_consecutive_seen_ts {
                 e1_ts.cmp(e2_ts)
@@ -299,7 +290,8 @@ impl BucketEntryInner {
         } else if e2.peer_stats.rpc_stats.first_consecutive_seen_ts.is_some() {
             std::cmp::Ordering::Greater
         } else {
-            std::cmp::Ordering::Equal
+            // Then check 'since added to routing table' timestamp
+            e1.peer_stats.time_added.cmp(&e2.peer_stats.time_added)
         }
     }
 

veilid-core/src/routing_table/route_spec_store/mod.rs

@@ -362,7 +362,7 @@ impl RouteSpecStore {
                        entry1: &Option<Arc<BucketEntry>>,
                        entry2: &Option<Arc<BucketEntry>>|
          -> Ordering {
-            // Our own node is filtered out
+            // Our own node is filtered out, so it is safe to unwrap here
             let entry1 = entry1.as_ref().unwrap().clone();
             let entry2 = entry2.as_ref().unwrap().clone();
             let entry1_node_ids = entry1.with_inner(|e| e.node_ids());
@@ -398,6 +398,7 @@ impl RouteSpecStore {
                             .signed_node_info(RoutingDomain::PublicInternet)
                             .map(|sni| sni.has_sequencing_matched_dial_info(sequencing))
                             .unwrap_or(false);
+                        // Reverse this comparison because ordered is preferable (less)
                         e2_can_do_ordered.cmp(&e1_can_do_ordered)
                     })
                 });
@@ -406,8 +407,8 @@ impl RouteSpecStore {
                 }
             }
 
+            // apply stability preference
             // always prioritize reliable nodes, but sort by oldest or fastest
-
             entry1.with_inner(|e1| {
                 entry2.with_inner(|e2| match stability {
                     Stability::LowLatency => BucketEntryInner::cmp_fastest_reliable(cur_ts, e1, e2),

veilid-core/src/routing_table/tasks/private_route_management.rs

@@ -213,8 +213,8 @@ impl RoutingTable {
                 // These will be used by test_remote_route as well
                 match rss.allocate_route(
                     &VALID_CRYPTO_KINDS,
-                    Stability::default(),
+                    Stability::Reliable,
-                    Sequencing::EnsureOrdered,
+                    Sequencing::PreferOrdered,
                     default_route_hop_count,
                     DirectionSet::all(),
                     &[],

veilid-core/src/veilid_api/api.rs

@@ -253,7 +253,7 @@ impl VeilidAPI {
     // Private route allocation
 
     /// Allocate a new private route set with default cryptography and network options.
-    /// Default settings are for [Stability::Reliable] and [Sequencing::EnsureOrdered].
+    /// Default settings are for [Stability::Reliable] and [Sequencing::PreferOrdered].
     /// Returns a route id and a publishable 'blob' with the route encrypted with each crypto kind.
     /// Those nodes importing the blob will have their choice of which crypto kind to use.
     ///
@@ -264,7 +264,7 @@ impl VeilidAPI {
         self.new_custom_private_route(
             &VALID_CRYPTO_KINDS,
             Stability::Reliable,
-            Sequencing::EnsureOrdered,
+            Sequencing::PreferOrdered,
         )
         .await
     }

veilid-core/src/veilid_api/routing_context.rs

@@ -56,7 +56,7 @@ impl RoutingContext {
                     preferred_route: None,
                     hop_count: c.network.rpc.default_route_hop_count as usize,
                     stability: Stability::Reliable,
-                    sequencing: Sequencing::EnsureOrdered,
+                    sequencing: Sequencing::PreferOrdered,
                 }),
             }),
         })
@@ -68,7 +68,7 @@ impl RoutingContext {
     /// Default values for hop count, stability and sequencing preferences are used.
     ///
     /// * Hop count default is dependent on config, but is set to 1 extra hop.
-    /// * Stability default is to choose 'low latency' routes, preferring them over long-term reliability.
+    /// * Stability default is to choose reliable routes, preferring them over low latency.
     /// * Sequencing default is to prefer ordered before unordered message delivery.
     ///
     /// To customize the safety selection in use, use [RoutingContext::with_safety()].
@@ -84,7 +84,7 @@ impl RoutingContext {
             preferred_route: None,
             hop_count: c.network.rpc.default_route_hop_count as usize,
             stability: Stability::Reliable,
-            sequencing: Sequencing::EnsureOrdered,
+            sequencing: Sequencing::PreferOrdered,
         }))
     }
 

veilid-flutter/example/integration_test/test_dht.dart

@@ -283,8 +283,7 @@ Future<void> testWatchDHTValues(Stream<VeilidUpdate> updateStream) async {
     // as the watch's target
 
     final rcSet = await Veilid.instance.routingContext();
-    final rcWatch = await Veilid.instance
+    final rcWatch = await Veilid.instance.unsafeRoutingContext();
-        .unsafeRoutingContext(sequencing: Sequencing.ensureOrdered);
     try {
       // Make a DHT record
       var rec = await rcWatch.createDHTRecord(const DHTSchema.dflt(oCnt: 10));

veilid-python/tests/test_dht.py

@@ -227,9 +227,7 @@ async def test_watch_dht_values():
     # as the watch's target
     rcWatch = await api.new_routing_context()
     
-    rcSet = await (await api.new_routing_context()).with_safety(
+    rcSet = await (await api.new_routing_context()).with_safety(veilid.SafetySelection.unsafe())
-        veilid.SafetySelection.unsafe(veilid.Sequencing.ENSURE_ORDERED)
-    )
     async with rcWatch, rcSet:
         # Make a DHT record
         rec = await rcWatch.create_dht_record(veilid.DHTSchema.dflt(10))

veilid-python/veilid/types.py

@@ -506,7 +506,7 @@ class SafetySelection:
             setattr(self, k, v)
 
     @classmethod
-    def unsafe(cls, sequencing: Sequencing) -> Self:
+    def unsafe(cls, sequencing: Sequencing = Sequencing.PREFER_ORDERED) -> Self:
         return cls(SafetySelectionKind.UNSAFE, sequencing=sequencing)
 
     @classmethod