From bde7aae95d3f7614a94cb1476abef77c07648eeb Mon Sep 17 00:00:00 2001
From: Camron Flanders <camron.flanders@gmail.com>
Date: Mon, 15 Aug 2022 12:27:38 -0500
Subject: [PATCH 1/4] Add support for custom retry strategies

---
 src/common.ts |  5 +++++
 src/retry.ts  | 10 ++++++----
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/common.ts b/src/common.ts
index 2915b271..d64c74ea 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -159,6 +159,11 @@ export interface RetryConfig {
    * When there is no response, the number of retries to attempt. Defaults to 2.
    */
   noResponseRetries?: number;
+  
+  /**
+   * Function to invoke which determines how long to delay the next retry.
+   */
+   retryBackoff?: (err: GaxiosError, defaultBackoffMs: number) => Promise<void>;
 }
 
 export type FetchImplementation = (
diff --git a/src/retry.ts b/src/retry.ts
index a4462a95..f61ea9ed 100644
--- a/src/retry.ts
+++ b/src/retry.ts
@@ -70,10 +70,12 @@ export async function getRetryConfig(err: GaxiosError) {
   err.config.retryConfig!.currentRetryAttempt! += 1;
 
   // Create a promise that invokes the retry after the backOffDelay
-  const backoff = new Promise(resolve => {
-    setTimeout(resolve, delay);
-  });
-
+  const backoff = config.retryBackoff
+    ? config.retryBackoff(err, delay)
+    : new Promise((resolve) => {
+        setTimeout(resolve, delay);
+      });
+      
   // Notify the user if they added an `onRetryAttempt` handler
   if (config.onRetryAttempt) {
     config.onRetryAttempt(err);

From 878f8d06ac43e3c1b7c9e95c001ec3554d8bb1b2 Mon Sep 17 00:00:00 2001
From: Camron Flanders <camron.flanders@gmail.com>
Date: Mon, 15 Aug 2022 13:09:05 -0500
Subject: [PATCH 2/4] improve docs

---
 README.md     | 5 +++++
 src/common.ts | 4 +++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 74f13ad2..19a0ef72 100644
--- a/README.md
+++ b/README.md
@@ -144,6 +144,11 @@ over other authentication methods, i.e., application default credentials.
 
     // The amount of time to initially delay the retry, in ms.  Defaults to 100ms.
     retryDelay?: number;
+
+    // Function to invoke which returns a promise. After the promise resolves,
+    // the retry will be triggered. If provided, this will be used in-place of
+    // the `retryDelay`
+    retryBackoff?: (err: GaxiosError, defaultBackoffMs: number) => Promise<void>; 
   },
 
   // Enables default configuration for retries.
diff --git a/src/common.ts b/src/common.ts
index d64c74ea..eeb974d7 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -161,7 +161,9 @@ export interface RetryConfig {
   noResponseRetries?: number;
   
   /**
-   * Function to invoke which determines how long to delay the next retry.
+   * Function to invoke which returns a promise. After the promise resolves,
+   * the retry will be triggered. If provided, this will be used in-place of
+   * the `retryDelay`
    */
    retryBackoff?: (err: GaxiosError, defaultBackoffMs: number) => Promise<void>;
 }

From 81aff410cbcc12fdc6c435662cac395c0e8c4126 Mon Sep 17 00:00:00 2001
From: Camron Flanders <camron.flanders@gmail.com>
Date: Mon, 15 Aug 2022 13:39:25 -0500
Subject: [PATCH 3/4] revert changes to README

---
 README.md | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/README.md b/README.md
index 19a0ef72..74f13ad2 100644
--- a/README.md
+++ b/README.md
@@ -144,11 +144,6 @@ over other authentication methods, i.e., application default credentials.
 
     // The amount of time to initially delay the retry, in ms.  Defaults to 100ms.
     retryDelay?: number;
-
-    // Function to invoke which returns a promise. After the promise resolves,
-    // the retry will be triggered. If provided, this will be used in-place of
-    // the `retryDelay`
-    retryBackoff?: (err: GaxiosError, defaultBackoffMs: number) => Promise<void>; 
   },
 
   // Enables default configuration for retries.

From f430e691c70120cbf96b03550fbe0c340b1a8b67 Mon Sep 17 00:00:00 2001
From: Camron Flanders <camron.flanders@gmail.com>
Date: Mon, 6 Mar 2023 10:41:17 -0600
Subject: [PATCH 4/4] formatting

---
 src/common.ts | 4 ++--
 src/retry.ts  | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/common.ts b/src/common.ts
index eeb974d7..4513cdc3 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -159,13 +159,13 @@ export interface RetryConfig {
    * When there is no response, the number of retries to attempt. Defaults to 2.
    */
   noResponseRetries?: number;
-  
+
   /**
    * Function to invoke which returns a promise. After the promise resolves,
    * the retry will be triggered. If provided, this will be used in-place of
    * the `retryDelay`
    */
-   retryBackoff?: (err: GaxiosError, defaultBackoffMs: number) => Promise<void>;
+  retryBackoff?: (err: GaxiosError, defaultBackoffMs: number) => Promise<void>;
 }
 
 export type FetchImplementation = (
diff --git a/src/retry.ts b/src/retry.ts
index f61ea9ed..540298e8 100644
--- a/src/retry.ts
+++ b/src/retry.ts
@@ -72,10 +72,10 @@ export async function getRetryConfig(err: GaxiosError) {
   // Create a promise that invokes the retry after the backOffDelay
   const backoff = config.retryBackoff
     ? config.retryBackoff(err, delay)
-    : new Promise((resolve) => {
+    : new Promise(resolve => {
         setTimeout(resolve, delay);
       });
-      
+
   // Notify the user if they added an `onRetryAttempt` handler
   if (config.onRetryAttempt) {
     config.onRetryAttempt(err);