[10.x] Feature. Currency Strict Mode

Author: rez1dent3

config/config.php

@@ -78,6 +78,16 @@
         'seconds' => env('WALLET_LOCK_TTL', 1),
     ],
 
+    /**
+     * Feature flags for experiments.
+     */
+    'features' => [
+        /**
+         * Mode of strict work with currencies.
+         */
+        'currency_strict' => false,
+    ],
+
     /**
      * Internal services that can be overloaded.
      */

src/Internal/Service/FeatureService.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Bavix\Wallet\Internal\Service;
+
+/**
+ * @internal
+ */
+final class FeatureService implements FeatureServiceInterface
+{
+    public function isCurrencyStrictMode(): bool
+    {
+        /**
+         * @var $value bool|int
+         */
+        $value = config('wallet.features.currency_strict', false);
+
+        return (bool) $value;
+    }
+}

src/Internal/Service/FeatureServiceInterface.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Bavix\Wallet\Internal\Service;
+
+interface FeatureServiceInterface
+{
+    /**
+     * The mode prohibits work between wallets 1:1 for different currencies.
+     */
+    public function isCurrencyStrictMode(): bool;
+}