From 645958bbeb25c9feadd7d95e58a05b501b3e6a1e Mon Sep 17 00:00:00 2001
From: Matt Fiddaman <github@m.fiddaman.uk>
Date: Fri, 6 Dec 2024 21:29:26 +0000
Subject: [PATCH] Return GoCardless rate limit information on error (#509)

---
 src/app-gocardless/app-gocardless.js | 13 ++++++++++++-
 upcoming-release-notes/509.md        |  6 ++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 upcoming-release-notes/509.md

diff --git a/src/app-gocardless/app-gocardless.js b/src/app-gocardless/app-gocardless.js
index cabeffcd6..b076a91b5 100644
--- a/src/app-gocardless/app-gocardless.js
+++ b/src/app-gocardless/app-gocardless.js
@@ -201,8 +201,19 @@ app.post(
         });
       }
     } catch (error) {
+      const headers = error.details?.response?.headers ?? {};
+
+      const rateLimitHeaders = Object.fromEntries(
+        Object.entries(headers).filter(([key]) =>
+          key.startsWith('http_x_ratelimit'),
+        ),
+      );
+
       const sendErrorResponse = (data) =>
-        res.send({ status: 'ok', data: { ...data, details: error.details } });
+        res.send({
+          status: 'ok',
+          data: { ...data, details: error.details, rateLimitHeaders },
+        });
 
       switch (true) {
         case error instanceof RequisitionNotLinked:
diff --git a/upcoming-release-notes/509.md b/upcoming-release-notes/509.md
new file mode 100644
index 000000000..91e2afe47
--- /dev/null
+++ b/upcoming-release-notes/509.md
@@ -0,0 +1,6 @@
+---
+category: Enhancements
+authors: [matt-fidd]
+---
+
+Add more logging for GoCardless rate limit information