multi: log server message

Author: joostjager

loopin.go

@@ -180,6 +180,10 @@ func newLoopInSwap(globalCtx context.Context, cfg *swapConfig,
 		return nil, fmt.Errorf("cannot store swap: %v", err)
 	}
 
+	if swapResp.serverMessage != "" {
+		swap.log.Infof("Server message: %v", swapResp.serverMessage)
+	}
+
 	return swap, nil
 }
 

loopout.go

@@ -176,6 +176,10 @@ func newLoopOutSwap(globalCtx context.Context, cfg *swapConfig,
 		return nil, fmt.Errorf("cannot store swap: %v", err)
 	}
 
+	if swapResp.serverMessage != "" {
+		swap.log.Infof("Server message: %v", swapResp.serverMessage)
+	}
+
 	return swap, nil
 }
 

looprpc/server.pb.go

@@ -72,6 +72,9 @@ message ServerLoopOutResponse {
     bytes sender_key = 3;
 
     int32 expiry = 4;
+
+    // A human-readable message from the loop server.
+    string server_message = 5;
 }
 
 message ServerLoopOutQuoteRequest {
@@ -127,6 +130,9 @@ message ServerLoopInRequest {
 message ServerLoopInResponse {
     bytes receiver_key = 1;
     int32 expiry = 2;
+
+    // A human-readable message from the loop server.
+    string server_message = 3;
 }
 
 message ServerLoopInQuoteRequest {

looprpc/server.proto

@@ -215,6 +215,7 @@ func (s *grpcSwapServerClient) NewLoopOutSwap(ctx context.Context,
 		prepayInvoice: swapResp.PrepayInvoice,
 		senderKey:     senderKey,
 		expiry:        swapResp.Expiry,
+		serverMessage: swapResp.ServerMessage,
 	}, nil
 }
 
@@ -268,8 +269,9 @@ func (s *grpcSwapServerClient) NewLoopInSwap(ctx context.Context,
 	}
 
 	return &newLoopInResponse{
-		receiverKey: receiverKey,
-		expiry:      swapResp.Expiry,
+		receiverKey:   receiverKey,
+		expiry:        swapResp.Expiry,
+		serverMessage: swapResp.ServerMessage,
 	}, nil
 }
 
@@ -334,9 +336,11 @@ type newLoopOutResponse struct {
 	prepayInvoice string
 	senderKey     [33]byte
 	expiry        int32
+	serverMessage string
 }
 
 type newLoopInResponse struct {
-	receiverKey [33]byte
-	expiry      int32
+	receiverKey   [33]byte
+	expiry        int32
+	serverMessage string
 }