rpcserver: expose interceptor required flag on info call

docs/release-notes/release-notes-0.15.0.md

@@ -223,6 +223,9 @@ then watch it on chain. Taproot script spends are also supported through the
 * Close a gap in the HTLC interceptor API by [intercepting htlcs in the on-chain
   resolution flow](https://github.com/lightningnetwork/lnd/pull/6219) too.
 
+* [Expose](https://github.com/lightningnetwork/lnd/pull/6454) always on mode of
+  the HTLC interceptor API through GetInfo.
+
 ## Database
 
 * [Add ForAll implementation for etcd to speed up

lnrpc/lightning.proto

@@ -1809,6 +1809,11 @@ message GetInfoResponse {
     announcements and invoices.
     */
     map<uint32, Feature> features = 19;
+
+    /*
+    Indicates whether the HTLC interceptor API is in always-on mode.
+    */
+    bool require_htlc_interceptor = 21;
 }
 
 message GetRecoveryInfoRequest {

lnrpc/lightning.swagger.json

@@ -4445,6 +4445,10 @@
             "$ref": "#/definitions/lnrpcFeature"
           },
           "description": "Features that our node has advertised in our init message, node\nannouncements and invoices."
+        },
+        "require_htlc_interceptor": {
+          "type": "boolean",
+          "description": "Indicates whether the HTLC interceptor API is in always-on mode."
         }
       }
     },

rpcserver.go

@@ -2802,24 +2802,25 @@ func (r *rpcServer) GetInfo(_ context.Context,
 
 	// TODO(roasbeef): add synced height n stuff
 	return &lnrpc.GetInfoResponse{
-		IdentityPubkey:      encodedIDPub,
-		NumPendingChannels:  nPendingChannels,
-		NumActiveChannels:   activeChannels,
-		NumInactiveChannels: inactiveChannels,
-		NumPeers:            uint32(len(serverPeers)),
-		BlockHeight:         uint32(bestHeight),
-		BlockHash:           bestHash.String(),
-		SyncedToChain:       isSynced,
-		Testnet:             chainreg.IsTestnet(&r.cfg.ActiveNetParams),
-		Chains:              activeChains,
-		Uris:                uris,
-		Alias:               nodeAnn.Alias.String(),
-		Color:               routing.EncodeHexColor(nodeAnn.RGBColor),
-		BestHeaderTimestamp: bestHeaderTimestamp,
-		Version:             build.Version() + " commit=" + build.Commit,
-		CommitHash:          build.CommitHash,
-		SyncedToGraph:       isGraphSynced,
-		Features:            features,
+		IdentityPubkey:         encodedIDPub,
+		NumPendingChannels:     nPendingChannels,
+		NumActiveChannels:      activeChannels,
+		NumInactiveChannels:    inactiveChannels,
+		NumPeers:               uint32(len(serverPeers)),
+		BlockHeight:            uint32(bestHeight),
+		BlockHash:              bestHash.String(),
+		SyncedToChain:          isSynced,
+		Testnet:                chainreg.IsTestnet(&r.cfg.ActiveNetParams),
+		Chains:                 activeChains,
+		Uris:                   uris,
+		Alias:                  nodeAnn.Alias.String(),
+		Color:                  routing.EncodeHexColor(nodeAnn.RGBColor),
+		BestHeaderTimestamp:    bestHeaderTimestamp,
+		Version:                build.Version() + " commit=" + build.Commit,
+		CommitHash:             build.CommitHash,
+		SyncedToGraph:          isGraphSynced,
+		Features:               features,
+		RequireHtlcInterceptor: r.cfg.RequireInterceptor,
 	}, nil
 }