CREATE TABLE `payments` (
  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `seller_id` INT UNSIGNED NOT NULL,
  `plan_id` INT UNSIGNED NOT NULL,
  `paypal_order_id` VARCHAR(64) NOT NULL,
  `amount` DECIMAL(10,2) NOT NULL,
  `currency` VARCHAR(10) NOT NULL DEFAULT 'MXN',
  `status` ENUM('created','completed','failed') NOT NULL DEFAULT 'created',
  `raw_response` TEXT,
  `created_at` DATETIME DEFAULT CURRENT_TIMESTAMP,
  `completed_at` DATETIME DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `paypal_order_id` (`paypal_order_id`),
  KEY `seller_id` (`seller_id`),
  KEY `plan_id` (`plan_id`),
  CONSTRAINT `payments_ibfk_1` FOREIGN KEY (`seller_id`) REFERENCES `users` (`id`),
  CONSTRAINT `payments_ibfk_2` FOREIGN KEY (`plan_id`) REFERENCES `plans` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3;