fix: Downgrading from an annual plan to a monthly plan results in the deferred cancellation of the merchant's current app subscription.

src/Actions/GetPlanUrl.php

@@ -70,20 +70,10 @@ public function __invoke(ShopId $shopId, NullablePlanId $planId, string $host):
         $plan = $planId->isNull() ? $this->planQuery->getDefault() : $this->planQuery->getById($planId);
 
         // Confirmation URL
-        if ($plan->getInterval()->toNative() === ChargeInterval::ANNUAL()->toNative()) {
-            $api = $shop->apiHelper()
-                ->createChargeGraphQL($this->chargeHelper->details($plan, $shop, $host));
+        $api = $shop->apiHelper()
+            ->createChargeGraphQL($this->chargeHelper->details($plan, $shop, $host));
 
-            $confirmationUrl = $api['confirmationUrl'];
-        } else {
-            $api = $shop->apiHelper()
-                ->createCharge(
-                    ChargeType::fromNative($plan->getType()->toNative()),
-                    $this->chargeHelper->details($plan, $shop, $host)
-                );
-
-            $confirmationUrl = $api['confirmation_url'];
-        }
+        $confirmationUrl = $api['confirmationUrl'];
 
         return $confirmationUrl;
     }

src/Contracts/ApiHelper.php

@@ -125,16 +125,6 @@ public function getCharge(ChargeType $chargeType, ChargeReference $chargeRef): R
      */
     public function activateCharge(ChargeType $chargeType, ChargeReference $chargeRef): ResponseAccess;
 
-    /**
-     * Create a charge.
-     *
-     * @param ChargeType  $chargeType The type of charge (plural).
-     * @param PlanDetails $payload    The data for the charge creation.
-     *
-     * @return ResponseAccess
-     */
-    public function createCharge(ChargeType $chargeType, PlanDetails $payload): ResponseAccess;
-
     /**
      * Create a charge using GraphQL.
      *

src/Services/ApiHelper.php

@@ -248,25 +248,6 @@ public function activateCharge(ChargeType $chargeType, ChargeReference $chargeRe
         return $response['body'][$typeString];
     }
 
-    /**
-     * {@inheritdoc}
-     * TODO: Convert to GraphQL (merge createChargeGraphQL).
-     */
-    public function createCharge(ChargeType $chargeType, PlanDetailsTransfer $payload): ResponseAccess
-    {
-        // API path
-        $typeString = $this->chargeApiPath($chargeType);
-
-        // Fire the request
-        $response = $this->doRequest(
-            ApiMethod::POST(),
-            "/admin/{$typeString}s.json",
-            [$typeString => $payload->toArray()]
-        );
-
-        return $response['body'][$typeString];
-    }
-
     /**
      * {@inheritdoc}
      *
@@ -278,13 +259,15 @@ public function createChargeGraphQL(PlanDetailsTransfer $payload): ResponseAcces
         mutation appSubscriptionCreate(
             $name: String!,
             $returnUrl: URL!,
+            $replacementBehavior: AppSubscriptionReplacementBehavior,
             $trialDays: Int,
             $test: Boolean,
             $lineItems: [AppSubscriptionLineItemInput!]!
         ) {
             appSubscriptionCreate(
                 name: $name,
                 returnUrl: $returnUrl,
+                replacementBehavior: $replacementBehavior,
                 trialDays: $trialDays,
                 test: $test,
                 lineItems: $lineItems
@@ -303,6 +286,7 @@ public function createChargeGraphQL(PlanDetailsTransfer $payload): ResponseAcces
         $variables = [
             'name' => $payload->name,
             'returnUrl' => $payload->returnUrl,
+            'replacementBehavior' => 'APPLY_IMMEDIATELY',
             'trialDays' => $payload->trialDays,
             'test' => $payload->test,
             'lineItems' => [

tests/Services/ApiHelperTest.php

@@ -150,31 +150,6 @@ public function testActivateCharge(): void
         $this->assertSame('Super Mega Plan', $data['name']);
     }
 
-    public function testCreateCharge(): void
-    {
-        // Create a shop
-        $shop = factory($this->model)->create();
-
-        // Response stubbing
-        $this->setApiStub();
-        ApiStub::stubResponses(['post_recurring_application_charges']);
-
-        // Build the details object
-        $transfer = new PlanDetailsTransfer();
-        $transfer->name = 'Test';
-        $transfer->price = 12.00;
-        $transfer->interval = PlanInterval::EVERY_30_DAYS()->toNative();
-        $transfer->test = true;
-        $transfer->trialDays = 7;
-
-        $data = $shop->apiHelper()->createCharge(
-            ChargeType::RECURRING(),
-            $transfer
-        );
-        $this->assertInstanceOf(ResponseAccess::class, $data);
-        $this->assertSame('Basic Plan', $data['name']);
-    }
-
     public function testGetWebhooks(): void
     {
         // Create a shop