From 4568d2a98e7a296db2ac8d2311aa60de47f652a1 Mon Sep 17 00:00:00 2001
From: "nicolas.dorier" <nicolas.dorier@gmail.com>
Date: Fri, 31 Aug 2018 10:45:21 +0900
Subject: [PATCH] Add exchange name to expired rate

---
 BTCPayServer/Services/Rates/BackgroundFetcherRateProvider.cs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/BTCPayServer/Services/Rates/BackgroundFetcherRateProvider.cs b/BTCPayServer/Services/Rates/BackgroundFetcherRateProvider.cs
index 6b658c1e2..e10c26687 100644
--- a/BTCPayServer/Services/Rates/BackgroundFetcherRateProvider.cs
+++ b/BTCPayServer/Services/Rates/BackgroundFetcherRateProvider.cs
@@ -18,7 +18,7 @@ namespace BTCPayServer.Services.Rates
             public DateTimeOffset NextRefresh;
             public DateTimeOffset Expiration;
             public Exception Exception;
-
+            public string ExchangeName;
             internal ExchangeRates GetResult()
             {
                 if (Expiration <= DateTimeOffset.UtcNow)
@@ -29,7 +29,7 @@ namespace BTCPayServer.Services.Rates
                     }
                     else
                     {
-                        throw new InvalidOperationException("The rate has expired");
+                        throw new InvalidOperationException($"The rate has expired ({ExchangeName})");
                     }
                 }
                 return Latest;
@@ -128,6 +128,7 @@ namespace BTCPayServer.Services.Rates
         {
             var previous = _Latest;
             var fetch = new LatestFetch();
+            fetch.ExchangeName = GetExchangeName();
             try
             {
                 var rates = await _Inner.GetRatesAsync();