[lightning] save bit number when converting features from clightning

backend/src/api/lightning/clightning/clightning-convert.ts

@@ -114,12 +114,14 @@ export function convertNode(clNode: any): ILightningApi.Node {
     const feature = FeaturesMap.get(i);
     if (!feature) {
       nodeFeatures.push({
+        bit: i,
         name: 'unknown',
         is_required: i % 2 === 0,
         is_known: false
       });
     } else {
       nodeFeatures.push({
+        bit: i,
         name: feature,
         is_required: i % 2 === 0,
         is_known: true

backend/src/api/lightning/lightning-api.interface.ts

@@ -79,6 +79,7 @@ export namespace ILightningApi {
   }
 
   export interface Feature {
+    bit: number;
     name: string;
     is_required: boolean;
     is_known: boolean;