feat: add fiscalization settings, POST callbacks and fix callback issues

catalog/controller/payment/callback.php

@@ -719,34 +719,6 @@ class Callback extends \Opencart\System\Engine\Controller
 		return 'unknown';
 	}
 
-	/**
-	 * @param array<non-empty-string, mixed> $data
-	 * @return array
-	 */
-	public function buildJsonResponse(array $data): array
-	{
-		$jsonData = [
-			'id' => $data['MNT_ID'],
-			'transactionId' => $data['MNT_TRANSACTION_ID'],
-			'amount' => $data['MNT_AMOUNT'],
-			'signature' => $data['MNT_SIGNATURE'],
-			'resultCode' => $data['MNT_RESULT_CODE'],
-			'description' => $data['MNT_DESCRIPTION'],
-			'externalId' => $data['MNT_TRANSACTION_ID'],
-			'receipt' => [
-				'client' => $data['client'],
-				'items' => $data['items'],
-			],
-		];
-
-		$json = json_encode($jsonData, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
-
-		return [
-			'data' => $json ?: '',
-			'contentType' => self::JSON_CONTENT_TYPE,
-		];
-	}
-
 	/**
 	 * @param array<string, mixed> $data
 	 * @return array{data: string, contentType: string}