Database design (mysql) for game money account storage and update

Question

will try to describe problem.

The data:

I have a game in which players deposit and withdraw (won) real money. All gaming money stored in paypal account. For each game withdrawal and other operations I subtract some fee. All transactions and users accounts are stored in db(mysql)

The problem:

I need to keep actual data of total game money account. With part belongs to game(fees) and which to users.

The proposal for solution:

For each transaction create new row of game account changes. With this table we can get all history and account changes, fees

CREATE TABLE `SystemMoneyAccount` (
  `accountId` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `changerId` int(11) DEFAULT NULL,
  `totalMoney` decimal(11,2) DEFAULT NULL,
  `totalFee` decimal(5,2) DEFAULT NULL,
  `changeMoney` decimal(11,2) DEFAULT NULL,
  `changeFee` decimal(11,2) DEFAULT NULL,
  `changeDate` datetime DEFAULT NULL,
  PRIMARY KEY (`accountId`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

Looking forward for helping and any proposals. Thanks!

Answer 1

I came to conclusion to use model I described earlier. Just track every transaction in system and how it influence on system account (total money in system and fee part).