Function: cancel(byte[32] asset, address account, uint256[] orderIds)

This function cancels previously placed limit orders. The account should be an owner of all orders from orderIds. Provided orders are removed from the order book (if they exist), and the totalCollateralRefunded is returned from this function.

This function ensures the order belongs to the account and the order exists.

Branches and code coverage

Intended branches

• One reduceOnly order — totalCollateralRefunded is zero.

  Test coverage

• Successfully cancels all provided active limit orders.

  Test coverage

• Emits OrderCanceled events with correct data.

  Test coverage

• Orders are removed from the order book.

  Test coverage

• orderbookCollateral in the GTL contract is updated correctly.

  Test coverage

• quoteTokenOpenInterest is updated properly when side == Side.BUY.

  Test coverage

• baseTokenOpenInterest is updated properly when side == Side.SELL.

  Test coverage

Negative behavior

• order.owner != account.

  Negative test

• if order is null, this order will be skipped, and execution is not revert.

  Negative test

• orderIds contains duplicate IDs. All duplicate IDs are skipped, and execution is not revert.

  Negative test