數字資產交易所記錄 二

前提是提幣失敗，好比交易所地址中沒有幣了，那麼這個流程就被中斷了，這個時候有兩個辦法：

1. 回退

2. 交易所地址充幣，而後繼續執行

1. 回退

回退就是使用戶的帳戶回到沒有提幣時的狀態，固然也去除全部記錄：

// 第一步找出這個用戶的帳戶，並update記錄到原先的狀態
SELECT * FROM `accounts` WHERE `member_id` = 26;
UPDATE ...

// 第二步經過帳戶找到提幣記錄，刪除
SELECT * FROM `withdraws` WHERE `member_id` = 26 and `account_id` = 232;
DELETE FROM `withdraws` WHERE `member_id` = 26 and `account_id` = 232;

// 第三步找到帳戶變化歷史記錄，清楚
SELECT * FROM `account_versions` WHERE `member_id` = 26 and `account_id` = 232 and `modifiable_type` = 'Withdraw';
DELETE FROM  `account_versions` WHERE `member_id` = 26 and `account_id` = 232 and `modifiable_type` = 'Withdraw';