api+store: Add lastHop parameter for loop in quotes

Author: itsrachelfish

app/src/api/loop.ts

@@ -57,10 +57,12 @@ class LoopApi extends BaseApi<LoopEvents> {
   async getLoopInQuote(
     amount: Big,
     confTarget?: number,
+    lastHop?: string,
   ): Promise<LOOP.InQuoteResponse.AsObject> {
     const req = new LOOP.QuoteRequest();
     req.setAmt(amount.toString());
     if (confTarget) req.setConfTarget(confTarget);
+    if (lastHop) req.setLoopInLastHop(b64(lastHop));
     const res = await this._grpc.request(SwapClient.GetLoopInQuote, req, this._meta);
     return res.toObject();
   }

app/src/store/views/buildSwapView.ts

@@ -426,6 +426,7 @@ class BuildSwapView {
         const inQuote = await this._store.api.loop.getLoopInQuote(
           amount,
           this.confTarget,
+          this.loopInLastHop,
         );
         quote = {
           swapFee: Big(inQuote.swapFeeSat),

docs/release-notes/release-notes-0.14.1.md

@@ -16,6 +16,10 @@
 
 ### Bug Fixes
 
+* [Add `lastHop` parameter for Loop In 
+  quotes](https://github.com/lightninglabs/lightning-terminal/pull/920).
+  Fixes fee estimation bug when using Loop In for a specific channel.
+
 ### Functional Changes/Additions
 
 ### Technical and Architectural Updates
@@ -38,4 +42,5 @@
 
 # Contributors (Alphabetical Order)
 
-* Elle Mouton
+* Elle Mouton
+* Rachel Fish