feat(initservice): return list of wallets

This adds the list of lnd clients that were initialized or unlocked by
an `InitNode` or `CreateNode` call to their respective responses. This
can be used to display potentially helpful information to the user.

Closes #1018.

Author: sangaman

docs/api.md

@@ -34,11 +34,14 @@ class GrpcInitService {
    */
   public createNode: grpc.handleUnaryCall<xudrpc.CreateNodeRequest, xudrpc.CreateNodeResponse> = async (call, callback) => {
     try {
-      const mnemonic = await this.initService.createNode(call.request.toObject());
+      const { mnemonic, initializedLndWallets } = await this.initService.createNode(call.request.toObject());
       const response = new xudrpc.CreateNodeResponse();
       if (mnemonic) {
         response.setSeedMnemonicList(mnemonic);
       }
+      if (initializedLndWallets) {
+        response.setInitializedLndsList(initializedLndWallets);
+      }
 
       callback(null, response);
     } catch (err) {
@@ -52,8 +55,9 @@ class GrpcInitService {
    */
   public unlockNode: grpc.handleUnaryCall<xudrpc.UnlockNodeRequest, xudrpc.UnlockNodeResponse> = async (call, callback) => {
     try {
-      await this.initService.unlockNode(call.request.toObject());
+      const unlockedLndClients = await this.initService.unlockNode(call.request.toObject());
       const response = new xudrpc.UnlockNodeResponse();
+      response.setUnlockedLndsList(unlockedLndClients);
 
       callback(null, response);
     } catch (err) {

lib/grpc/GrpcInitService.ts

@@ -28,6 +28,7 @@ class InitService extends EventEmitter {
 
     this.pendingCall = true;
     const seed = await this.swapClientManager.genSeed();
+    let initializedLndWallets: string[] | undefined;
     let nodeKey: NodeKey;
 
     if (seed) {
@@ -43,15 +44,18 @@ class InitService extends EventEmitter {
       nodeKey = new NodeKey(privKey);
 
       // use this seed to init any lnd wallets that are uninitialized
-      await this.swapClientManager.initWallets(password, seed.cipherSeedMnemonicList);
+      initializedLndWallets = await this.swapClientManager.initWallets(password, seed.cipherSeedMnemonicList);
     } else {
       // we couldn't generate a seed externally, so we must create one locally
       nodeKey = await NodeKey.generate();
     }
 
     await nodeKey.toFile(this.nodeKeyPath, password);
     this.emit('nodekey', nodeKey);
-    return seed ? seed.cipherSeedMnemonicList : undefined;
+    return {
+      initializedLndWallets,
+      mnemonic: seed ? seed.cipherSeedMnemonicList : undefined,
+    };
   }
 
   public unlockNode = async (args: { password: string }) => {
@@ -68,7 +72,7 @@ class InitService extends EventEmitter {
     const nodeKey = await NodeKey.fromFile(this.nodeKeyPath, password);
     this.emit('nodekey', nodeKey);
 
-    await this.swapClientManager.unlockWallets(password);
+    return this.swapClientManager.unlockWallets(password);
   }
 }