From 998435196c114d1a62e8b43cb7775f0cd4a0d931 Mon Sep 17 00:00:00 2001
From: Aleksei Rozhnov <alekseyrozh@gmail.com>
Date: Thu, 30 Jan 2025 11:36:04 +0000
Subject: [PATCH] fix racecondition with 2 stripe customers for 1 user

---
 README.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index ae4a882..d6282f3 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,11 @@ export async function GET(req: Request) {
       email: user.email,
       metadata: {
         userId: user.id, // DO NOT FORGET THIS
-      },
+      }
+    }, {
+        // prevent race conditions of creating 2 customers in stripe for on user
+        // https://github.com/stripe/stripe-node/issues/476#issuecomment-402541143
+        idempotencyKey: user.id
     });
 
     // Store the relation between userId and stripeCustomerId in your KV