Hello,

By “bad” I assume that you mean the amount is zero.

I believe this is due to a previous version that had allowed this type of order to be inserted. I am not certain if the amounts are zero or if they are simply less than one satoshi, there is no way to tell from the screenshot.

In any case, the user who entered the orders should be able to cancel them, from the [wallets_exchange_orders] UI. This should be the easiest way.

Another way would be to directly delete them from the database:

1. Backup your database.

2. Assuming that your table DB prefix is wp_, you can do this in your SQL console:

DELETE FROM wp_wallets_orders WHERE amount < 0.000000001;

(That’s eight zeroes after the decimal, followed by a 1) This will delete all orders with amounts less than one Satoshi.

You can always start over if you empty the two tables:

TRUNCATE wp_wallets_orders;
TRUNCATE wp_wallets_trades;

To be clear, this will remove all exchange data. Don’t do this unless you really want to delete everything!!!

If you also need to reverse the trades that have been already executed, so that the funds are returned to the users as if the trades never happened:

DELETE FROM wp_wallets_txs WHERE category='trade';

Before you do anything else, could you please run this query? I’d like to understand if these orders are still open due to some sub-satoshi amount not having been filled.

SELECT amount,filled,status FROM wp_wallets_orders WHERE ( amount - filled ) < 0.00000001 AND amount > filled;

If you can email or post me the output, it will be very helpful for me to see what’s going on.

Thanks again

with regards

@davej Fees are not stored somewhere, they simply stay with the site’s hot wallet, and they stop belonging to the user who pays them.

About the exchange issue, to be clear, you see orders with a zero amount remaining on the bid/ask tables. I will investigate again and get back to you.

If possible, could you please run the SQL query that I mentioned above? That is:

SELECT amount,filled,status FROM wp_wallets_orders WHERE ( amount - filled ) < 0.00000001 AND amount > filled;

If you could show me the output it would be very helpful.

(Don’t forget to substitute wp_ with whatever your DB table prefix is)

Thank you.

when I try to erase that order, this appears:

@davej Hello,

I have been trying to reproduce this issue again but without success. If you like, there’s two things you could do, either one would help me reproduce the problem and thus solve it.

1. Can you locate the SQL console? If you have access to phpMyAdmin then you can find the SQL console there. Alternatively, your host can help you locate it. Please try the following query.

SELECT * FROM wp_wallets_orders WHERE ( amount - filled ) < 0.00001 and status='open';

You might have to replace wp_ in the query with your actual DB prefix. The DB prefix is shown in the dashboard section under “Bitcoin and Altcoin Wallets”.

2. If you cannot execute the query, could you please describe the exact steps that produced the problem? I might be able to recreate the problem by following the actions you performed.

Let me know please. Thank you.

with regards

@davej Thank you, I also want to solve this issue very badly, as it has been first reported so long ago.

Usually even shared hosting does give you some limited DB access, but OK.

Since it’s not easy to look at the database tables, here’s one more thing that might help me understand the problem:

Go to https://www.example.com/?__wallets_exchange_action=get_user_orders&__wallets_exchange_open=1 (replace example.com with your actual domain).

What do you see? Please copy the output here or email it. Thank you for your help.

The zero orders should no longer appear in the orderbook of version 1.0.0 of the Exchange extension. Full release notes: https://www.dashed-slug.net/exchange-1-0-0/

with regards