From e4612476bd7a5e7268385b190addb6780f79902c Mon Sep 17 00:00:00 2001
From: Helen Ye <helenye@stripe.com>
Date: Wed, 13 Nov 2024 13:53:03 -0500
Subject: [PATCH] Fix incorrect key in param encoding

---
 lib/stripe/util.rb       |  2 +-
 test/stripe/util_test.rb | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/stripe/util.rb b/lib/stripe/util.rb
index 44817888..d03e758c 100644
--- a/lib/stripe/util.rb
+++ b/lib/stripe/util.rb
@@ -259,7 +259,7 @@ def self.flatten_params_array(value, api_mode, calculated_key)
         if elem.is_a?(Hash)
           result += flatten_params(elem, api_mode, "#{calculated_key}[#{i}]")
         elsif elem.is_a?(Array)
-          result += flatten_params_array(elem, calculated_key, api_mode)
+          result += flatten_params_array(elem, api_mode, calculated_key)
         else
           result << if api_mode == :v2
                       [calculated_key, elem]
diff --git a/test/stripe/util_test.rb b/test/stripe/util_test.rb
index 900c37fb..8e5f5608 100644
--- a/test/stripe/util_test.rb
+++ b/test/stripe/util_test.rb
@@ -16,6 +16,7 @@ class UtilTest < Test::Unit::TestCase
 
           # NOTE: the empty hash won't even show up in the request
           g: [],
+
         }
         assert_equal(
           "a=3&b=%2Bfoo%3F&c=bar%26baz&d[a]=a&d[b]=b&e[0]=0&e[1]=1&f=",
@@ -23,6 +24,16 @@ class UtilTest < Test::Unit::TestCase
         )
       end
 
+      should "correctly represent nested arrays" do
+        params = {
+          a: [[foo: "bar", baz: "qux"]],
+        }
+        assert_equal(
+          "a[0][foo]=bar&a[0][baz]=qux",
+          Stripe::Util.encode_parameters(params, :v1)
+        )
+      end
+
       should "use correct array expansion for v2 query params" do
         params = {
           d: { a: "a", b: "b" },