Bitcoinica - 15169.57 BTC Traded in the last 24 hours

zhoutong

vip

Activity: 490

Merit: 502

Quote from: quattro on September 13, 2011, 03:13:17 AM

Quote from: zhoutong on September 12, 2011, 06:45:58 PM

Quote from: quattro on September 12, 2011, 04:24:54 PM

When will the issue with withdrawals be fixed?

I have been unable to withdraw my funds out of bitcoinica for 12 hours.

Thanks!

It has already been fixed. Make sure you don't withdraw your whole balance at once. Because your balanced may be rounded up and you won't have enough for withdrawal.

Thanks!

That doesn't make sense ... MtGox codes support more than two decimal places. Why are users unable to withdraw the correct amount? Why is it being rounded in the first place?

You may have understood it.

For example a user has $99.99999999 balance, but our site's sidebar can only fit in limited digits, so it's shown as $100.00. If the user assumes that he has $100.00 and wants to take his money out, he won't be able to do so because he doesn't have this amount of money.

So our solution is to show $99.99. If the user explicitly request for the remaining funds, we will be able to check the exact value and fulfill their requests.

quattro

member

Activity: 67

Merit: 10

Quote from: zhoutong on September 12, 2011, 06:45:58 PM

Quote from: quattro on September 12, 2011, 04:24:54 PM

When will the issue with withdrawals be fixed?

I have been unable to withdraw my funds out of bitcoinica for 12 hours.

Thanks!

It has already been fixed. Make sure you don't withdraw your whole balance at once. Because your balanced may be rounded up and you won't have enough for withdrawal.

Thanks!

That doesn't make sense ... MtGox codes support more than two decimal places. Why are users unable to withdraw the correct amount? Why is it being rounded in the first place?

2112

legendary

Activity: 2128

Merit: 1065

Quote from: lemonginger on September 12, 2011, 10:55:31 PM

So are you storing money as a float or just displaying it rounded to nearest cent?

There's nothing wrong with using floats to represent money, so long as the floats used are decimal. Twenty first century brought up the resurgence of decimal floating point. Nowadays pretty much everyone supports them. Check out the following page:

http://speleotrove.com/decimal/

Decimal floating point good! Binary floating point bad!

I think Bitcoinica is implemented mostly in Ruby, so the following will be relevant:

http://ruby-decimal.rubyforge.org/

zhoutong

vip

Activity: 490

Merit: 502

Quote from: lemonginger on September 12, 2011, 10:55:31 PM

So are you storing money as a float or just displaying it rounded to nearest cent?

We're using Decimal type in our PostgreSQL database. Money are displayed in either 2 d.p. or 4 d.p.

There's no rounding in processing of money. Only the displayed value is rounded.

I will change the withdrawal system to display rounded-down money instead. (Since a $99.999 customer shouldn't be able to withdraw $100.00, the system shouldn't display it as $100.00. We will display it as $99.99 instead.)

Not being able to withdraw $100.00 from a $99.9999999999 account is an indication that we don't use float for money.

lemonginger

full member

Activity: 210

Merit: 100

firstbits: 121vnq

So are you storing money as a float or just displaying it rounded to nearest cent?

zhoutong

vip

Activity: 490

Merit: 502

Quote from: Jonathan Ryan Owens on September 12, 2011, 08:16:36 PM

Quote from: phillipsjk on September 12, 2011, 08:14:59 PM

Quote from: zhoutong on September 12, 2011, 06:45:58 PM

It has already been fixed. Make sure you don't withdraw your whole balance at once. Because your balanced may be rounded up and you won't have enough for withdrawal.

Thanks!

Floating point numbers are not recommended for storing currency.

For calculations, if your float can not store 123456123456789, you probably are not using enough precision.

I believe he was referring to minimum account balance for withdrawal. i.e. 100 USD, you withdraw 98 USD and the 2 USD is trapped.

-Jonathan

Not exactly. If your balance is $99.999, the system will show $100.00. But you can't withdraw $100.00 because you only have $99.999.

This is what I mean. It's better to withdraw one cent less.

hmongotaku

full member

Activity: 168

Merit: 100

instant millionaire?

Jonathan Ryan Owens

donator

Activity: 392

Merit: 252

Quote from: phillipsjk on September 12, 2011, 08:14:59 PM

Quote from: zhoutong on September 12, 2011, 06:45:58 PM

It has already been fixed. Make sure you don't withdraw your whole balance at once. Because your balanced may be rounded up and you won't have enough for withdrawal.

Thanks!

Floating point numbers are not recommended for storing currency.

For calculations, if your float can not store 123456123456789, you probably are not using enough precision.

I believe he was referring to minimum account balance for withdrawal. i.e. 100 USD, you withdraw 98 USD and the 2 USD is trapped.

-Jonathan

phillipsjk

legendary

Activity: 1008

Merit: 1001

Let the chips fall where they may.

Quote from: zhoutong on September 12, 2011, 06:45:58 PM

It has already been fixed. Make sure you don't withdraw your whole balance at once. Because your balanced may be rounded up and you won't have enough for withdrawal.

Thanks!

Floating point numbers are not recommended for storing currency.

For calculations, if your float can not store 123456123456789, you probably are not using enough precision.

zhoutong

vip

Activity: 490

Merit: 502

Quote from: the founder on September 12, 2011, 03:40:35 PM

Quote from: nmat on September 12, 2011, 03:30:56 PM

Quote from: BlockHash on September 12, 2011, 03:17:24 PM

I'll be watching this, I really want there to be a good alternative to MTGox

Bitcoinica uses MtGox. They are not an exchange.

that's what bugs me... why do they use a potential competitor as their wallet?

Don't worry, I will contact you soon.

;-)

zhoutong

vip

Activity: 490

Merit: 502

Quote from: quattro on September 12, 2011, 04:24:54 PM

When will the issue with withdrawals be fixed?

I have been unable to withdraw my funds out of bitcoinica for 12 hours.

Thanks!

It has already been fixed. Make sure you don't withdraw your whole balance at once. Because your balanced may be rounded up and you won't have enough for withdrawal.

Thanks!

quattro

member

Activity: 67

Merit: 10

When will the issue with withdrawals be fixed?

I have been unable to withdraw my funds out of bitcoinica for 12 hours.

Thanks!

hugolp

legendary

Activity: 1148

Merit: 1001

Radix-The Decentralized Finance Protocol

Quote from: the founder on September 12, 2011, 03:40:35 PM

Quote from: nmat on September 12, 2011, 03:30:56 PM

Quote from: BlockHash on September 12, 2011, 03:17:24 PM

I'll be watching this, I really want there to be a good alternative to MTGox

Bitcoinica uses MtGox. They are not an exchange.

that's what bugs me... why do they use a potential competitor as their wallet?

Because MtGox is not a competitor. As me and nmat said before Bitcoinica is not an exchange.

the founder

sr. member

Activity: 448

Merit: 251

Bitcoin

Quote from: nmat on September 12, 2011, 03:30:56 PM

Quote from: BlockHash on September 12, 2011, 03:17:24 PM

I'll be watching this, I really want there to be a good alternative to MTGox

Bitcoinica uses MtGox. They are not an exchange.

that's what bugs me... why do they use a potential competitor as their wallet?

nmat

hero member

Activity: 602

Merit: 501

Quote from: BlockHash on September 12, 2011, 03:17:24 PM

I'll be watching this, I really want there to be a good alternative to MTGox

Bitcoinica uses MtGox. They are not an exchange.

BlockHash

full member

Activity: 406

Merit: 100

I'll be watching this, I really want there to be a good alternative to MTGox (Tradehill is not the answer - they won't allow a look inside their transactions to accurately gauge market depth). I just took all of my holding out of Mt.Gox until another suitable spot opens that is more trustworthy, not as shady, and doesn't deal with scammers.

fastandfurious

full member

Activity: 224

Merit: 100

Zhou Tong, I sent you an email yesterday, so I am waiting for a response.

fastandfurious

full member

Activity: 224

Merit: 100

I am one of the larger/largest trader(s) on Bitcoinica. I like the service, you can short sell and you can leverage, the Bitcoin community needs this. I think I alone when I counted had around 1/3 of the volume on the number he quoted for the past 24 hours, so his is probably not lying when it comes to the trading volume.

hugolp

legendary

Activity: 1148

Merit: 1001

Radix-The Decentralized Finance Protocol

Quote from: Vod on September 12, 2011, 11:13:14 AM

Quote from: zhoutong on September 12, 2011, 10:29:38 AM

We have no reason to make up the numbers ourselves.

You don't? Do you realize if no one is trading on your exchange, it will not attract new users?

If you make up large numbers it would encourage others to join and trade, as an alternative to MTGox.

His place is not a exchange and he acts as a market marker.

Vod

legendary

Activity: 3668

Merit: 3010

Licking my boob since 1970

Quote from: zhoutong on September 12, 2011, 10:29:38 AM

We have no reason to make up the numbers ourselves.

You don't? Do you realize if no one is trading on your exchange, it will not attract new users?

If you make up large numbers it would encourage others to join and trade, as an alternative to MTGox.

Topic: Bitcoinica - 15169.57 BTC Traded in the last 24 hours (Read 4951 times)