Add peers rpc to lnd (#4403)

lnd-rpc/lnd-rpc.sbt

@@ -17,11 +17,13 @@ Compile / scalacOptions ++= Seq(
   "-Wconf:cat=deprecation:site=walletrpc\\..*:silent",
   "-Wconf:cat=deprecation:site=routerrpc\\..*:silent",
   "-Wconf:cat=deprecation:site=invoicesrpc\\..*:silent",
+  "-Wconf:cat=deprecation:site=peersrpc\\..*:silent",
   "-Wconf:cat=unused-imports:site=lnrpc:silent",
   "-Wconf:cat=unused-imports:site=signrpc:silent",
   "-Wconf:cat=unused-imports:site=walletrpc:silent",
   "-Wconf:cat=unused-imports:site=routerrpc:silent",
-  "-Wconf:cat=unused-imports:site=invoicesrpc:silent"
+  "-Wconf:cat=unused-imports:site=invoicesrpc:silent",
+  "-Wconf:cat=unused-imports:site=peersrpc:silent"
 )
 
 TaskKeys.downloadLnd := {

lnd-rpc/src/main/protobuf/peersrpc/peers.proto

@@ -0,0 +1,115 @@
+syntax = "proto3";
+
+import "lightning.proto";
+
+package peersrpc;
+
+option go_package = "github.com/lightningnetwork/lnd/lnrpc/peersrpc";
+
+import "scalapb/scalapb.proto";
+
+option (scalapb.options) = {
+  import: "org.bitcoins.lnd.rpc.LndUtils._"
+  scope: PACKAGE
+  field_transformations : [
+    {
+      when : {
+        type: TYPE_UINT64
+      }
+      set : {[scalapb.field] {type : 'org.bitcoins.core.number.UInt64' }}
+    },
+    {
+      when : {
+        type: TYPE_UINT32
+      }
+      set : {[scalapb.field] {type : 'org.bitcoins.core.number.UInt32' }}
+    }
+  ]
+};
+
+// Peers is a service that can be used to get information and interact
+// with the other nodes of the newtwork.
+service Peers {
+  /* lncli: peers updatenodeannouncement
+  UpdateNodeAnnouncement allows the caller to update the node parameters
+  and broadcasts a new version of the node announcement to its peers.
+  */
+  rpc UpdateNodeAnnouncement (NodeAnnouncementUpdateRequest)
+      returns (NodeAnnouncementUpdateResponse);
+}
+
+// UpdateAction is used to determine the kind of action we are referring to.
+enum UpdateAction {
+  // ADD indicates this is an "insertion" kind of action.
+  ADD = 0;
+
+  // REMOVE indicates this is a "deletion" kind of action.
+  REMOVE = 1;
+}
+
+enum FeatureSet {
+  /*
+  SET_INIT identifies features that should be sent in an Init message to
+  a remote peer.
+  */
+  SET_INIT = 0;
+
+  /*
+  SET_LEGACY_GLOBAL identifies features that should be set in the legacy
+  GlobalFeatures field of an Init message, which maintains backwards
+  compatibility with nodes that haven't implemented flat features.
+  */
+  SET_LEGACY_GLOBAL = 1;
+
+  /*
+  SET_NODE_ANN identifies features that should be advertised on node
+  announcements.
+  */
+  SET_NODE_ANN = 2;
+
+  /*
+  SET_INVOICE identifies features that should be advertised on invoices
+  generated by the daemon.
+  */
+  SET_INVOICE = 3;
+
+  /*
+  SET_INVOICE_AMP identifies the features that should be advertised on
+  AMP invoices generated by the daemon.
+  */
+  SET_INVOICE_AMP = 4;
+}
+
+message UpdateAddressAction {
+  // Determines the kind of action.
+  UpdateAction action = 1;
+
+  // The address used to apply the update action.
+  string address = 2;
+}
+
+message UpdateFeatureAction {
+  // Determines the kind of action.
+  UpdateAction action = 1;
+
+  // The feature bit used to apply the update action.
+  lnrpc.FeatureBit feature_bit = 2;
+}
+
+message NodeAnnouncementUpdateRequest {
+  // Set of changes for the features that the node supports.
+  repeated UpdateFeatureAction feature_updates = 1;
+
+  // Color is the node's color in hex code format.
+  string color = 2;
+
+  // Alias or nick name of the node.
+  string alias = 3;
+
+  // Set of changes for the node's known addresses.
+  repeated UpdateAddressAction address_updates = 4;
+}
+
+message NodeAnnouncementUpdateResponse {
+  repeated lnrpc.Op ops = 1;
+}

lnd-rpc/src/main/scala/org/bitcoins/lnd/rpc/LndRpcClient.scala

@@ -37,6 +37,7 @@ import org.bitcoins.lnd.rpc.LndRpcClient._
 import org.bitcoins.lnd.rpc.LndUtils._
 import org.bitcoins.lnd.rpc.config._
 import org.bitcoins.lnd.rpc.internal._
+import peersrpc.PeersClient
 import routerrpc._
 import scodec.bits._
 import signrpc._
@@ -145,6 +146,7 @@ class LndRpcClient(val instance: LndInstance, binaryOpt: Option[File] = None)(
   lazy val signer: SignerClient = SignerClient(clientSettings)
   lazy val router: RouterClient = RouterClient(clientSettings)
   lazy val invoices: InvoicesClient = InvoicesClient(clientSettings)
+  lazy val peersClient: PeersClient = PeersClient(clientSettings)
   lazy val stateClient: StateClient = StateClient(clientSettings)
 
   def genSeed(): Future[GenSeedResponse] = {