Currency exchange rate will not be saved when rate is 0.

app/Helpers/Filter/CountAttachmentsFilter.php

@@ -64,4 +64,4 @@ class CountAttachmentsFilter implements FilterInterface
 
         return $set;
     }
-}
+}

app/Helpers/Filter/SplitIndicatorFilter.php

@@ -64,4 +64,4 @@ class SplitIndicatorFilter implements FilterInterface
 
         return $set;
     }
-}
+}

app/Services/Bunq/Object/Image.php

@@ -59,4 +59,4 @@ class Image extends BunqObject
         die(sprintf('Cannot convert %s to array.', get_class($this)));
     }
 
-}
+}

app/Services/Bunq/Object/LabelUser.php

@@ -87,4 +87,4 @@ class LabelUser extends BunqObject
     {
         die(sprintf('Cannot convert %s to array.', get_class($this)));
     }
-}
+}

app/Services/Currency/FixerIOv2.php

@@ -92,11 +92,13 @@ class FixerIOv2 implements ExchangeRateInterface
         }
         if (null !== $content) {
             $code = $toCurrency->code;
-            $rate = isset($content['rates'][$code]) ? $content['rates'][$code] : '0';
+            $rate = $content['rates'][$code] ?? 0;
         }
         Log::debug('Got the following rates from Fixer: ', $content['rates'] ?? []);
         $exchangeRate->rate = $rate;
-        $exchangeRate->save();
+        if ($rate !== 0) {
+            $exchangeRate->save();
+        }
 
         return $exchangeRate;
     }

app/Services/Internal/Destroy/CategoryDestroyService.php

@@ -43,4 +43,4 @@ class CategoryDestroyService
             Log::error(sprintf('Could not delete category: %s', $e->getMessage())); // @codeCoverageIgnore
         }
     }
-}
+}

app/Services/Internal/Destroy/CurrencyDestroyService.php

@@ -45,4 +45,4 @@ class CurrencyDestroyService
         }
     }
 
-}
+}

app/Services/Internal/Update/CategoryUpdateService.php

@@ -45,4 +45,4 @@ class CategoryUpdateService
         return $category;
     }
 
-}
+}

app/Services/Internal/Update/CurrencyUpdateService.php

@@ -47,4 +47,4 @@ class CurrencyUpdateService
         return $currency;
     }
 
-}
+}

database/migrations/2018_03_19_141348_changes_for_v472.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;