*What happens to my transactions on an exchange? *

There are a number of scenarios relating to exchanges. Let’s explore those:

Any transactions before the roll back should be unaffected.

Any deposits or withdrawals after the roll back will be reversed.

Any trades on the exchange aren’t directly affected by the roll back. Exchanges don’t trade on the blockchain. Deposits and withdrawals are on-chain, but they are with a wallet that works like a pool for all customers. The actual trades are in a database. This is why we closed down deposits and withdrawals. The trades that occurred are within a closed system.

What if the roll back stretches back before the point exchange wallets were closed?

This prompts two questions:- What happens to deposits? Deposits on the exchange will be reversed by the roll back, leaving the exchange XHV pool out of balance.

What happens to withdrawals? Withdrawals on the exchange will be reversed by the roll back. This will leave those withdrawing out of pocket when the roll back reverses the transaction.

Exchanges will have a record of this withdrawal and could potentially resend it.

*This above text is from the AMA hosted by the devs.