From 282c8f1decbc6ca78bf06840a2976fafe4e650d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Krzysztof=20=C5=BBuraw?=
 <9116238+krzysztofzuraw@users.noreply.github.com>
Date: Mon, 5 May 2025 11:29:08 +0200
Subject: [PATCH 1/2] Add readonly arrays

---
 .changeset/early-cities-jam.md                       |  5 +++++
 src/handlers/shared/sync-webhook-response-builder.ts | 10 +++++-----
 2 files changed, 10 insertions(+), 5 deletions(-)
 create mode 100644 .changeset/early-cities-jam.md

diff --git a/.changeset/early-cities-jam.md b/.changeset/early-cities-jam.md
new file mode 100644
index 00000000..c2663bce
--- /dev/null
+++ b/.changeset/early-cities-jam.md
@@ -0,0 +1,5 @@
+---
+"@saleor/app-sdk": patch
+---
+
+Add `readonly` to actions for `TRANSACTION_CHARGE_REQUESTED`, `TRANSACTION_REFUND_REQUESTED`, `TRANSACTION_CANCELATION_REQUESTED`, `TRANSACTION_INITIALIZE_SESSION` & `TRANSACTION_PROCESS_SESSION` events.
diff --git a/src/handlers/shared/sync-webhook-response-builder.ts b/src/handlers/shared/sync-webhook-response-builder.ts
index 3006981a..e9a447aa 100644
--- a/src/handlers/shared/sync-webhook-response-builder.ts
+++ b/src/handlers/shared/sync-webhook-response-builder.ts
@@ -37,7 +37,7 @@ export type SyncWebhookResponsesMap = {
     time?: string;
     externalUrl?: string;
     message?: string;
-    actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
+    readonly actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
   };
   // https://docs.saleor.io/developer/extending/webhooks/synchronous-events/transaction#sync-flow-2
   TRANSACTION_REFUND_REQUESTED: {
@@ -47,7 +47,7 @@ export type SyncWebhookResponsesMap = {
     time?: string;
     externalUrl?: string;
     message?: string;
-    actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
+    readonly actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
   };
   // https://docs.saleor.io/developer/extending/webhooks/synchronous-events/transaction#response-1
   TRANSACTION_CANCELATION_REQUESTED: {
@@ -57,7 +57,7 @@ export type SyncWebhookResponsesMap = {
     time?: string;
     externalUrl?: string;
     message?: string;
-    actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
+    readonly actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
   };
   PAYMENT_GATEWAY_INITIALIZE_SESSION: {
     data: unknown;
@@ -79,7 +79,7 @@ export type SyncWebhookResponsesMap = {
     time?: string;
     externalUrl?: string;
     message?: string;
-    actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
+    readonly actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
   };
   // https://docs.saleor.io/developer/extending/webhooks/synchronous-events/transaction#response-5
   TRANSACTION_PROCESS_SESSION: {
@@ -98,7 +98,7 @@ export type SyncWebhookResponsesMap = {
     time?: string;
     externalUrl?: string;
     message?: string;
-    actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
+    readonly actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
   };
   PAYMENT_METHOD_PROCESS_TOKENIZATION_SESSION:
     | {

From 356f8cb221e9270ecd1fff76dc03925c00a24ba9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Krzysztof=20=C5=BBuraw?=
 <9116238+krzysztofzuraw@users.noreply.github.com>
Date: Mon, 5 May 2025 11:49:15 +0200
Subject: [PATCH 2/2] update solution

---
 src/handlers/shared/sync-webhook-response-builder.ts | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/handlers/shared/sync-webhook-response-builder.ts b/src/handlers/shared/sync-webhook-response-builder.ts
index e9a447aa..3477a0c4 100644
--- a/src/handlers/shared/sync-webhook-response-builder.ts
+++ b/src/handlers/shared/sync-webhook-response-builder.ts
@@ -1,5 +1,7 @@
 import { SyncWebhookEventType } from "../../types";
 
+type TransactionActions = "CHARGE" | "REFUND" | "CANCEL";
+
 export type SyncWebhookResponsesMap = {
   CHECKOUT_CALCULATE_TAXES: {
     shipping_price_gross_amount: number;
@@ -37,7 +39,7 @@ export type SyncWebhookResponsesMap = {
     time?: string;
     externalUrl?: string;
     message?: string;
-    readonly actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
+    actions?: readonly TransactionActions[];
   };
   // https://docs.saleor.io/developer/extending/webhooks/synchronous-events/transaction#sync-flow-2
   TRANSACTION_REFUND_REQUESTED: {
@@ -47,7 +49,7 @@ export type SyncWebhookResponsesMap = {
     time?: string;
     externalUrl?: string;
     message?: string;
-    readonly actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
+    actions?: readonly TransactionActions[];
   };
   // https://docs.saleor.io/developer/extending/webhooks/synchronous-events/transaction#response-1
   TRANSACTION_CANCELATION_REQUESTED: {
@@ -57,7 +59,7 @@ export type SyncWebhookResponsesMap = {
     time?: string;
     externalUrl?: string;
     message?: string;
-    readonly actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
+    actions?: readonly TransactionActions[];
   };
   PAYMENT_GATEWAY_INITIALIZE_SESSION: {
     data: unknown;
@@ -79,7 +81,7 @@ export type SyncWebhookResponsesMap = {
     time?: string;
     externalUrl?: string;
     message?: string;
-    readonly actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
+    actions?: readonly TransactionActions[];
   };
   // https://docs.saleor.io/developer/extending/webhooks/synchronous-events/transaction#response-5
   TRANSACTION_PROCESS_SESSION: {
@@ -98,7 +100,7 @@ export type SyncWebhookResponsesMap = {
     time?: string;
     externalUrl?: string;
     message?: string;
-    readonly actions?: Array<"CHARGE" | "REFUND" | "CANCEL">;
+    actions?: readonly TransactionActions[];
   };
   PAYMENT_METHOD_PROCESS_TOKENIZATION_SESSION:
     | {