add accountBalance filter

src/Twig/AppExtension.php

@@ -52,6 +52,13 @@ class AppExtension extends AbstractExtension
                     'formatKVA'
                 ]
             ),
+            new TwigFilter(
+                'account_balance',
+                [
+                    $this,
+                    'accountBalance'
+                ]
+            ),
             new TwigFilter(
                 'message_to_markdown',
                 [
@@ -270,6 +277,24 @@ class AppExtension extends AbstractExtension
         );
     }
 
+    public function accountBalance(
+        string $account
+    ): ?float
+    {
+        // Connect kevacoin
+        $client = new \Kevachat\Kevacoin\Client(
+            $this->container->getParameter('app.kevacoin.protocol'),
+            $this->container->getParameter('app.kevacoin.host'),
+            $this->container->getParameter('app.kevacoin.port'),
+            $this->container->getParameter('app.kevacoin.username'),
+            $this->container->getParameter('app.kevacoin.password')
+        );
+
+        return $client->getAccountAddress(
+            $account
+        );
+    }
+
     public function messageToMarkdown(
         string $text
     ): string