Intersango exchange (formerly Britcoin)

[dooglus]

So i've downloaded the code to have a play around.
Im reasonably new at LAMP etc.. but have figured out most of the problems on my own. The thing is I am getting this on the profile page under balance:

Warning: gmp_cmp(): Unable to convert variable to GMP - wrong type in /var/www/bcx/util.php on line 115

Im guessing GMP or something may not be configured properly? Any ideas?

I get that all the time.

It only seems to affect the code that transfers bitcoins from the bitcoin client into the exchange database.  I just ignore it, and deposit funds by doing something like:

Code:

  update purses set amount = 123e8 where uid=99 and type='GBP';

Everything seems to work other than this.

[MadduckUK]

hi genjix, bit of an odd one - forwarded to britcoin 1.05BTC on 29.06.11 @ 09:08, trouble is on my requests list it is verifying with a d/t of 01.07.11 @ 09:25.

odd, no?  

edit: just to add - as of 09:40 the transfer was completed. did my logging into britcoin (i haven't been on since i started the transfer) have something to do with it? is this how it normally works and i haven't noticed before now?

[genjix]

So i've downloaded the code to have a play around.
Im reasonably new at LAMP etc.. but have figured out most of the problems on my own. The thing is I am getting this on the profile page under balance:

Warning: gmp_cmp(): Unable to convert variable to GMP - wrong type in /var/www/bcx/util.php on line 115

Im guessing GMP or something may not be configured properly? Any ideas?

I get that all the time.

It only seems to affect the code that transfers bitcoins from the bitcoin client into the exchange database.  I just ignore it, and deposit funds by doing something like:

Code:

  update purses set amount = 123e8 where uid=99 and type='GBP';

Everything seems to work other than this.

You need our special bitcoin, https://gitorious.org/intersango/bitcoind

[sonba]

By the way, do you already have a timeline for implementing an API?

[lumos]

By the way, do you already have a timeline for implementing an API?

yes, we are working on a new version of the exchange. it will have an API and should be ready in under a month.

[sonba]

By the way, do you already have a timeline for implementing an API?

yes, we are working on a new version of the exchange. it will have an API and should be ready in under a month.

sweet Looking forward!

[dooglus]

Did anyone notice the recent trade at 45 pence per BTC?

Code:

Fri Jul  1 10:21:01 2011   9.889100   2.214555
Fri Jul  1 10:49:01 2011   9.889100   5.423131
Fri Jul  1 11:19:01 2011   9.881400   1.000000
Fri Jul  1 12:00:01 2011   0.446300   0.007894
Fri Jul  1 12:26:01 2011  10.000000  10.000000
Fri Jul  1 12:31:02 2011  10.000000   3.000000
Fri Jul  1 12:31:02 2011  10.000000   2.000000

I think this was caused by the code still using the updated want_amount database field.

I committed a fix for this a few days ago and mailed Genjix.  The fix is here if anyone could look it over for me:

  https://gitorious.org/~dooglus/intersango/dooglus-intersango/commit/126d05d8f23a2745da8db65fb57414eca607d0d8

[lumos]

Did anyone notice the recent trade at 45 pence per BTC?

Code:

Fri Jul  1 10:21:01 2011   9.889100   2.214555
Fri Jul  1 10:49:01 2011   9.889100   5.423131
Fri Jul  1 11:19:01 2011   9.881400   1.000000
Fri Jul  1 12:00:01 2011   0.446300   0.007894
Fri Jul  1 12:26:01 2011  10.000000  10.000000
Fri Jul  1 12:31:02 2011  10.000000   3.000000
Fri Jul  1 12:31:02 2011  10.000000   2.000000

I think this was caused by the code still using the updated want_amount database field.

I committed a fix for this a few days ago and mailed Genjix.  The fix is here if anyone could look it over for me:

  https://gitorious.org/~dooglus/intersango/dooglus-intersango/commit/126d05d8f23a2745da8db65fb57414eca607d0d8

we ran our unit testing scripts and didn't find any problems with the rates, could you tell use what order this is so we could check it out.

[dooglus]

we ran our unit testing scripts and didn't find any problems with the rates, could you tell use what order this is so we could check it out.

I have no way of knowing - it wasn't my order, but it's clearly wrong.  The timestamps in the list of trades I posted are in Pacific time.  Add 8 hours to get BST; that should let you find it.  Or query on the price since there shouldn't be more than that one order with that price:

Code:

select * from transactions where abs(a_amount/b_amount-0.4463) < 0.0001 or abs(b_amount/a_amount-0.4463) < 0.0001;

The problem is that the want_amount field of the orderbook table is used for doing matches when I don't think it should be.  Suppose you have an order on the books and someone comes along and fills most of it by offering a much better rate than you asked for.  Your (have) amount field will be reduced some, and your want_amount field will be reduced a lot, leaving you the ratio of 'want' to 'have' being much lower than the ratio of initial_want_amount to initial_amount.  Since want_amount is used in the matching code, you can end up with the leftover portion of your order being matched at a very unfavourable rate for you.

My patch at https://gitorious.org/~dooglus/intersango/dooglus-intersango/commit/126d05d8f23a2745da8db65fb57414eca607d0d8 fixes the problem by never using the want_amount column other than for display.

[phantomcircuit]

Have you entered bug fixing mode yet? The reason I ask is because i am currently seeing PHP errors all over your website. I was about to make my first BTC deposit.

I don't believe they have.

Can you show the errors you're getting, and/or tell us how to see them for ourselves?  I've not noticed the errors.

Errors seem to have gone now. Was getting fopen() PHP errors when accessing profile or deposit pages. They were probably updating the site....

That happens when bitcoind crashes.

[phantomcircuit]

I'd like people's thoughts on the new exchange

http://forum.bitcoin.org/index.php?topic=25580.0

[bitcola]

I entered my newly created openid login created at myopenid as suggested but when I click the Submit button I get:

Couldn't resolve host '<my login id - removed for this post>'

Any ideas?

[The Koolio]

can people stop driving the price down by looking at mtgox charts... if people bothered looking at tradehill or something the price wudnt have fallen as bad

[lumos]

hi, we are moving to a new site layout so it will be temporarily down. thanks.

[lumos]

site is back up now

[genjix]

Press CTRL + F5 if site graphics haven't been updated.

[dooglus]

I entered my newly created openid login created at myopenid as suggested but when I click the Submit button I get:

Couldn't resolve host '<my login id - removed for this post>'

Any ideas?

Seems the site was down for a while.  Seems OK again now.

[willphase]

like the new layout - good to be able to see the most viable trades for both ask/bid on the same screen now.

Will

[mizerydearia]

My flowers are better than your flowers

[phantomcircuit]

The bank account has been moved over to HSBC, deposits to the lloyd's account will be credited, but in the future use HSBC. (details on the deposit page)