Remove support for initial_routing_sync (#1683)

We keep the GetRoutingState API available in the router as it's useful to
query network information locally (or between actors), but we stop sending
that data to remote nodes.

docs/Configure.md

@@ -61,7 +61,7 @@ Note that you can also disable some default features:
 
 ```conf
 eclair.features {
-    initial_routing_sync = disabled
+    option_support_large_channel = disabled
 }
 ```
 
@@ -77,7 +77,7 @@ eclair.override-features = [
     {
         nodeId = "03864ef025fde8fb587d989186ce6a4a186895ee44a926bfc370e2c366597a3f8f"
         features {
-            initial_routing_sync = disabled
+            option_support_large_channel = disabled
             option_static_remotekey = optional
         }
     },

eclair-core/src/main/resources/reference.conf

@@ -42,7 +42,6 @@ eclair {
   trampoline-payments-enable = false // TODO: @t-bast: once spec-ed this should use a global feature flag
   // see https://github.com/lightningnetwork/lightning-rfc/blob/master/09-features.md
   features {
-    initial_routing_sync = optional
     option_data_loss_protect = optional
     gossip_queries = optional
     gossip_queries_ex = optional

eclair-core/src/main/scala/fr/acinq/eclair/NodeParams.scala

@@ -250,6 +250,7 @@ object NodeParams extends Logging {
       val featuresErr = Features.validateFeatureGraph(features)
       require(featuresErr.isEmpty, featuresErr.map(_.message))
       require(features.hasFeature(Features.VariableLengthOnion), s"${Features.VariableLengthOnion.rfcName} must be enabled")
+      require(!features.hasFeature(Features.InitialRoutingSync), s"${Features.InitialRoutingSync.rfcName} is not supported anymore, use ${Features.ChannelRangeQueries.rfcName} instead")
     }
 
     val pluginMessageParams = pluginParams.collect { case p: CustomFeaturePlugin => p }

eclair-core/src/main/scala/fr/acinq/eclair/io/PeerConnection.scala

@@ -347,10 +347,6 @@ class PeerConnection(keyPair: KeyPair, conf: PeerConnection.Conf, switchboard: A
           val flags_opt = if (canUseChannelRangeQueriesEx) Some(QueryChannelRangeTlv.QueryFlags(QueryChannelRangeTlv.QueryFlags.WANT_ALL)) else None
           log.info(s"sending sync channel range query with flags_opt=$flags_opt replacePrevious=$replacePrevious")
           router ! SendChannelQuery(d.chainHash, d.remoteNodeId, self, replacePrevious, flags_opt)
-        } else if (d.remoteInit.features.hasFeature(Features.InitialRoutingSync) && replacePrevious) {
-          // For "old" nodes that don't support channel queries, we send them the full routing table
-          log.info("peer requested a full routing table dump")
-          router ! GetRoutingState
         }
         stay
 

eclair-core/src/test/scala/fr/acinq/eclair/StartupSpec.scala

@@ -93,7 +93,6 @@ class StartupSpec extends AnyFunSuite {
 
     val legalFeaturesConf = ConfigFactory.parseMap(Map(
       s"features.${OptionDataLossProtect.rfcName}" -> "optional",
-      s"features.${InitialRoutingSync.rfcName}" -> "optional",
       s"features.${ChannelRangeQueries.rfcName}" -> "optional",
       s"features.${ChannelRangeQueriesExtended.rfcName}" -> "optional",
       s"features.${VariableLengthOnion.rfcName}" -> "optional",
@@ -104,11 +103,19 @@ class StartupSpec extends AnyFunSuite {
     // var_onion_optin cannot be disabled
     val noVariableLengthOnionConf = ConfigFactory.parseMap(Map(
       s"features.${OptionDataLossProtect.rfcName}" -> "optional",
-      s"features.${InitialRoutingSync.rfcName}" -> "optional",
       s"features.${ChannelRangeQueries.rfcName}" -> "optional",
       s"features.${ChannelRangeQueriesExtended.rfcName}" -> "optional"
     ).asJava)
 
+    // initial_routing_sync cannot be enabled
+    val initialRoutingSyncConf = ConfigFactory.parseMap(Map(
+      s"features.${OptionDataLossProtect.rfcName}" -> "optional",
+      s"features.${InitialRoutingSync.rfcName}" -> "optional",
+      s"features.${ChannelRangeQueries.rfcName}" -> "optional",
+      s"features.${ChannelRangeQueriesExtended.rfcName}" -> "optional",
+      s"features.${VariableLengthOnion.rfcName}" -> "optional"
+    ).asJava)
+
     // basic_mpp without payment_secret
     val illegalFeaturesConf = ConfigFactory.parseMap(Map(
       s"features.${BasicMultiPartPayment.rfcName}" -> "optional"
@@ -116,6 +123,7 @@ class StartupSpec extends AnyFunSuite {
 
     assert(Try(makeNodeParamsWithDefaults(finalizeConf(legalFeaturesConf))).isSuccess)
     assert(Try(makeNodeParamsWithDefaults(finalizeConf(noVariableLengthOnionConf))).isFailure)
+    assert(Try(makeNodeParamsWithDefaults(finalizeConf(initialRoutingSyncConf))).isFailure)
     assert(Try(makeNodeParamsWithDefaults(finalizeConf(illegalFeaturesConf))).isFailure)
   }
 

eclair-core/src/test/scala/fr/acinq/eclair/TestConstants.scala

@@ -154,7 +154,6 @@ object TestConstants {
       publicAddresses = NodeAddress.fromParts("localhost", 9731).get :: Nil,
       features = Features(
         Set(
-          ActivatedFeature(InitialRoutingSync, Optional),
           ActivatedFeature(OptionDataLossProtect, Optional),
           ActivatedFeature(ChannelRangeQueries, Optional),
           ActivatedFeature(ChannelRangeQueriesExtended, Optional),
@@ -261,7 +260,6 @@ object TestConstants {
       color = Color(4, 5, 6),
       publicAddresses = NodeAddress.fromParts("localhost", 9732).get :: Nil,
       features = Features(Set(
-        ActivatedFeature(InitialRoutingSync, Optional),
         ActivatedFeature(OptionDataLossProtect, Optional),
         ActivatedFeature(ChannelRangeQueries, Optional),
         ActivatedFeature(ChannelRangeQueriesExtended, Optional),

eclair-core/src/test/scala/fr/acinq/eclair/integration/IntegrationSpec.scala

@@ -85,7 +85,6 @@ abstract class IntegrationSpec extends TestKitBaseClass with BitcoindService wit
 
   val commonFeatures = ConfigFactory.parseMap(Map(
     s"eclair.features.${OptionDataLossProtect.rfcName}" -> "optional",
-    s"eclair.features.${InitialRoutingSync.rfcName}" -> "optional",
     s"eclair.features.${ChannelRangeQueries.rfcName}" -> "optional",
     s"eclair.features.${ChannelRangeQueriesExtended.rfcName}" -> "optional",
     s"eclair.features.${VariableLengthOnion.rfcName}" -> "optional",