CREATE TABLE `events` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `slug` varchar(255) CHARACTER SET ascii COLLATE ascii_bin DEFAULT NULL,
  `community_id` int(10) unsigned NOT NULL,
  `start` timestamp NOT NULL DEFAULT current_timestamp(),
  `end` timestamp NOT NULL DEFAULT current_timestamp(),
  `title` varchar(255) NOT NULL,
  `description` text NOT NULL,
  PRIMARY KEY (`id`),
  KEY `community_id` (`community_id`),
  UNIQUE KEY `slug` (`slug`),
  CONSTRAINT `events_community_id` FOREIGN KEY (`community_id`) REFERENCES `communities` (`id`)
) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;

ALTER TABLE `transactions`
ADD `event_id` int(10) unsigned NULL,
ADD KEY `event_id` (`event_id`) AFTER `community_id`,
ADD CONSTRAINT `transactions_event_id` FOREIGN KEY (`event_id`) REFERENCES `events` (`id`);