Refactor normalizeAmountToString method to handle currencies with dif…

…ferent decimal places

src/Managers/MollieManager.php

@@ -39,6 +39,7 @@ public function createPayment(
         ?int $amount = null
     ): Payment {
         $amount = $amount ?? $cart->total->value;
+        $currency = $cart->currency;
 
         $meta = (array) $cart->meta;
 
@@ -56,7 +57,7 @@ public function createPayment(
         $payment = [
             'amount' => [
                 'currency' => $cart->currency->code,
-                'value' => self::normalizeAmountToString($amount),
+                'value' => self::normalizeAmountToString($amount, $currency->decimal_places),
             ],
             'description' => $description,
             'redirectUrl' => self::getRedirectUrl($cart),
@@ -183,7 +184,11 @@ public static function getCancelUrl(Cart $cart): string
      */
     public static function normalizeAmountToString(int $amount, int $decimal_places = 2): string
     {
-        return number_format($amount / 100, $decimal_places, '.', '');
+
+        // 2950000
+        $v = (int) str_pad('1', $decimal_places + 1, '0', STR_PAD_RIGHT);
+
+        return number_format($amount / $v, 2, '.', '');
     }
 
     /**

tests/Feature/CreatePaymentTest.php

@@ -339,3 +339,31 @@
     expect($amount)->toBeInt();
     expect($amount)->toBe(200000);
 });
+
+test('can normalize amount to string', function () {
+    $amount = MollieManager::normalizeAmountToString(2000);
+    expect($amount)->toBeString();
+    expect($amount)->toBe('20.00');
+
+    $amount = MollieManager::normalizeAmountToString(2096);
+    expect($amount)->toBeString();
+    expect($amount)->toBe('20.96');
+
+    $amount = MollieManager::normalizeAmountToString(2060);
+    expect($amount)->toBeString();
+    expect($amount)->toBe('20.60');
+});
+
+test('can normalize amount to string for a currency with 4 decimals', function () {
+    $amount = MollieManager::normalizeAmountToString(200000, 4);
+    expect($amount)->toBeString();
+    expect($amount)->toBe('20.00');
+
+    $amount = MollieManager::normalizeAmountToString(209600, 4);
+    expect($amount)->toBeString();
+    expect($amount)->toBe('20.96');
+
+    $amount = MollieManager::normalizeAmountToString(206000, 4);
+    expect($amount)->toBeString();
+    expect($amount)->toBe('20.60');
+});