EtherDelta Trade Logic 2

EtherDelta Trade Logic 2.sol

function tradeBalances(address tokenGet, uint amountGet, address tokenGive, uint amountGive, address user, uint amount) private {
  uint feeMakeXfer = safeMul(amount, feeMake) / (1 ether);
  uint feeTakeXfer = safeMul(amount, feeTake) / (1 ether);
  uint feeRebateXfer = 0;
  if (accountLevelsAddr != 0x0) {
    uint accountLevel = AccountLevels(accountLevelsAddr).accountLevel(user);
    if (accountLevel==1) feeRebateXfer = safeMul(amount, feeRebate) / (1 ether);
    if (accountLevel==2) feeRebateXfer = feeTakeXfer;
  }
  tokens[tokenGet][msg.sender] = safeSub(tokens[tokenGet][msg.sender], safeAdd(amount, feeTakeXfer));
  tokens[tokenGet][user] = safeAdd(tokens[tokenGet][user], safeSub(safeAdd(amount, feeRebateXfer), feeMakeXfer));
  tokens[tokenGet][feeAccount] = safeAdd(tokens[tokenGet][feeAccount], safeSub(safeAdd(feeMakeXfer, feeTakeXfer), feeRebateXfer));
  tokens[tokenGive][user] = safeSub(tokens[tokenGive][user], safeMul(amountGive, amount) / amountGet);
  tokens[tokenGive][msg.sender] = safeAdd(tokens[tokenGive][msg.sender], safeMul(amountGive, amount) / amountGet);
}