###币种信息表 `currency`
```mysql
CREATE TABLE `currency` (
    `id` int NOT NULL AUTO_INCREMENT,
    `currency_id` bigint DEFAULT NULL,
    `currency_name` varchar(255) DEFAULT NULL,
    `currency_type` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '币种类型',
    `state` int DEFAULT NULL,
    `created_at` datetime DEFAULT NULL,
    `updated_at` datetime DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
    `deleted_at` datetime DEFAULT NULL,
    PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='币种';
```