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Author Topic: www.BITSTAMP.net Bitcoin exchange site for USD/BTC  (Read 206137 times)
klabaki
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July 01, 2013, 12:53:54 AM
 #401

Fuck yeah, money math precision is an ass pain of all financial amateurs running bitcoin services. Looks like only gox using int64 for internal money calculations. All others use some shitty rounding or floating point math.

Of course, this is pennies and I don't care. But small or daily traders should.
Bitstamp uses fixed-point arithmetics, just like they ought to do. The orders are executed with the precise BTC amount that they were posted for. The transaction's USD amount is calculated as BTC amount times price, rounded like the following:
  • x.499999.... rounds down to x
  • x.50000....1 rounds up to x+1
  • exactly x.5 triggers a randomness, rounding to x or x+1 with a 50/50 chance.
Seems fair to me.

The fee is calculated as USD amount times your personal fee rate, the result is rounded up, minimum 0.01 USD. I think this is what kakobrekla is complaining about.

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RoadTrain
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July 02, 2013, 01:22:43 AM
 #402

Fuck yeah, money math precision is an ass pain of all financial amateurs running bitcoin services. Looks like only gox using int64 for internal money calculations. All others use some shitty rounding or floating point math.

Of course, this is pennies and I don't care. But small or daily traders should.
Bitstamp uses fixed-point arithmetics, just like they ought to do. The orders are executed with the precise BTC amount that they were posted for. The transaction's USD amount is calculated as BTC amount times price, rounded like the following:
  • x.499999.... rounds down to x
  • x.50000....1 rounds up to x+1
  • exactly x.5 triggers a randomness, rounding to x or x+1 with a 50/50 chance.
Seems fair to me.

The fee is calculated as USD amount times your personal fee rate, the result is rounded up, minimum 0.01 USD. I think this is what kakobrekla is complaining about.
Where did you find this information?

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klabaki
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July 02, 2013, 01:47:37 AM
 #403

Fuck yeah, money math precision is an ass pain of all financial amateurs running bitcoin services. Looks like only gox using int64 for internal money calculations. All others use some shitty rounding or floating point math.

Of course, this is pennies and I don't care. But small or daily traders should.
Bitstamp uses fixed-point arithmetics, just like they ought to do. The orders are executed with the precise BTC amount that they were posted for. The transaction's USD amount is calculated as BTC amount times price, rounded like the following:
  • x.499999.... rounds down to x
  • x.50000....1 rounds up to x+1
  • exactly x.5 triggers a randomness, rounding to x or x+1 with a 50/50 chance.
Seems fair to me.

The fee is calculated as USD amount times your personal fee rate, the result is rounded up, minimum 0.01 USD. I think this is what kakobrekla is complaining about.
Where did you find this information?
In my transaction history.

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Wer den Satoshi nicht ehrt, der ist den Ƶibcoin nicht wert.
Pompobit
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July 02, 2013, 06:57:52 PM
 #404

what's the point to use google authenticator if using the trading API anyone that steals my username and password can empty my account?

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klabaki
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July 02, 2013, 07:02:49 PM
 #405

what's the point to use google authenticator if using the trading API anyone that steals my username and password can empty my account?
If I remember that correctly, I had to enable API access in my account settings before I could start using the API.

So it's disabled by default, i.e. only API traders will have it enabled, and those should know what they are doing.

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Wer den Satoshi nicht ehrt, der ist den Ƶibcoin nicht wert.
maco
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July 02, 2013, 09:37:52 PM
 #406

5th transaction with BITSTAMP and still happy.

I love the security feature which requires (EMAIL CONFIRMATION) during transaction.  This is a great security feature/mechanism just in case...


Question for Bitstamp:
How often does this email confirmation occur? or is it when I am not doing too many transactions
when email confirmations kick in? or is it random? what is the going rate for email confirms.
juhakall
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July 02, 2013, 09:41:12 PM
 #407

5th transaction with BITSTAMP and still happy.

I love the security feature which requires (EMAIL CONFIRMATION) during transaction.  This is a great security feature/mechanism just in case...


Question for Bitstamp:
How often does this email confirmation occur? or is it when I am not doing too many transactions
when email confirmations kick in? or is it random? what is the going rate for email confirms.

Unless I'm mistaken, confirmation emails are only sent when you withdraw USD or BTC. That should deter most attackers, since they can't directly steal anything if they have access to the account.
hazek
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July 02, 2013, 10:11:43 PM
 #408

5th transaction with BITSTAMP and still happy.

I love the security feature which requires (EMAIL CONFIRMATION) during transaction.  This is a great security feature/mechanism just in case...


Question for Bitstamp:
How often does this email confirmation occur? or is it when I am not doing too many transactions
when email confirmations kick in? or is it random? what is the going rate for email confirms.

Unless I'm mistaken, confirmation emails are only sent when you withdraw USD or BTC. That should deter most attackers, since they can't directly steal anything if they have access to the account.

Correct, if the featured is activate on an account (it is on by default) then all USD or BTC withdrawals and API key activation require email confirmation.

My personality type: INTJ - please forgive my weaknesses (Not naturally in tune with others feelings; may be insensitive at times, tend to respond to conflict with logic and reason, tend to believe I'm always right)

If however you enjoyed my post: 15j781DjuJeVsZgYbDVt2NZsGrWKRWFHpp
maco
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July 03, 2013, 01:34:08 AM
 #409

Yes, during withdraws. Okay perfect! Thanks for your response.

5th transaction with BITSTAMP and still happy.

I love the security feature which requires (EMAIL CONFIRMATION) during transaction.  This is a great security feature/mechanism just in case...


Question for Bitstamp:
How often does this email confirmation occur? or is it when I am not doing too many transactions
when email confirmations kick in? or is it random? what is the going rate for email confirms.

Unless I'm mistaken, confirmation emails are only sent when you withdraw USD or BTC. That should deter most attackers, since they can't directly steal anything if they have access to the account.
maco
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July 03, 2013, 01:35:37 AM
 #410

Okay Thanks for the info on that, hazek.

I just wanted to get that cleared up to make sure myself and others know its in our best interest.
I actually think this is very important just in case. Good work on this feature.

And keep up the good work in the value you offer here to the community!


5th transaction with BITSTAMP and still happy.

I love the security feature which requires (EMAIL CONFIRMATION) during transaction.  This is a great security feature/mechanism just in case...


Question for Bitstamp:
How often does this email confirmation occur? or is it when I am not doing too many transactions
when email confirmations kick in? or is it random? what is the going rate for email confirms.

Unless I'm mistaken, confirmation emails are only sent when you withdraw USD or BTC. That should deter most attackers, since they can't directly steal anything if they have access to the account.

Correct, if the featured is activate on an account (it is on by default) then all USD or BTC withdrawals and API key activation require email confirmation.

hazek
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July 03, 2013, 08:11:23 AM
 #411

While it's not new, if at all possible please also make sure to use the two factor authentication security feature with the email confirmation security feature for the most possible security for your account. You can download a guide how to set it up here: https://www.bitstamp.net/s/documents/bitstamp_2_factor_authentication_guide.pdf

My personality type: INTJ - please forgive my weaknesses (Not naturally in tune with others feelings; may be insensitive at times, tend to respond to conflict with logic and reason, tend to believe I'm always right)

If however you enjoyed my post: 15j781DjuJeVsZgYbDVt2NZsGrWKRWFHpp
Spaceman_Spiff
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July 03, 2013, 06:22:14 PM
 #412

Sorry if this is mentioned elsewhere, but I couldn't find it on the site: Are there any fees for converting USD to EUR during withdrawal or deposit?
bernard75
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July 03, 2013, 06:30:32 PM
 #413

Only the banks exchange fees:
http://www.unicreditbank.si/tecajna_lista/?t=1&id_menu=&language=ENG

What i was wondering for qquite some time:
Bitstamp is a majotr player in Europe, why not offer a EUR exchange???
There are already plans for other Exchanges to focus more on EU customers.
Why is this not implemented, which doesnt take a genius to copy and you guys are loosing money daily.
IG0BR0KE
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July 03, 2013, 06:36:11 PM
 #414

sry if the question have already been posed but i would like to know how many days it takes to get his account verified on bitstamp? thank for your answer.
hazek
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July 03, 2013, 06:38:42 PM
 #415

Sorry if this is mentioned elsewhere, but I couldn't find it on the site: Are there any fees for converting USD to EUR during withdrawal or deposit?

There are no fees, the funds get converted automatically by our bank's daily exchange rate spreads which you can examine here: http://www.unicreditbank.si/tecajna_lista/?t=1&id_menu=&language=ENG

My personality type: INTJ - please forgive my weaknesses (Not naturally in tune with others feelings; may be insensitive at times, tend to respond to conflict with logic and reason, tend to believe I'm always right)

If however you enjoyed my post: 15j781DjuJeVsZgYbDVt2NZsGrWKRWFHpp
hazek
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July 03, 2013, 06:48:29 PM
 #416

sry if the question have already been posed but i would like to know how many days it takes to get his account verified on bitstamp? thank for your answer.

It's usually the same or the next day.

My personality type: INTJ - please forgive my weaknesses (Not naturally in tune with others feelings; may be insensitive at times, tend to respond to conflict with logic and reason, tend to believe I'm always right)

If however you enjoyed my post: 15j781DjuJeVsZgYbDVt2NZsGrWKRWFHpp
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July 04, 2013, 02:35:17 PM
 #417

I am very sad about the API change. Skip, offset? And limited to a max request of 100 trades?

Tell me, how do I fetch "all trades since 1st june" now? Iterate over and over again with a limit of 100 results and proceed with a smallish offset like 60 to avoid missing new trades, because there is no relation between offset and anything else?

The old fetch wasn't optimal, but this is dissatisfying and will create way more requests and an even bigger overhead. Suggestion: from, since time or TID.

And please create a newsletter for developers or publish a PSA for further changes.

Edit: limit and offset isn't even working.

https://www.bitstamp.net/api/transactions/?offset=1500&limit=10

juhakall
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July 04, 2013, 02:54:01 PM
 #418

I am very sad about the API change. Skip, offset? And limited to a max request of 100 trades?

Tell me, how do I fetch "all trades since 1st june" now? Iterate over and over again with a limit of 100 results and proceed with a smallish offset like 60 to avoid missing new trades, because there is no relation between offset and anything else?

The old fetch wasn't optimal, but this is dissatisfying and will create way more requests and an even bigger overhead. Suggestion: from, since time or TID.

And please create a newsletter for developers or publish a PSA for further changes.

Edit: limit and offset isn't even working.

https://www.bitstamp.net/api/transactions/?offset=1500&limit=10

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klabaki
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July 04, 2013, 03:46:38 PM
 #419

Looks like I have to do some coding again Undecided (I am lazy.)

But we can all admit that the old API wasn't optimal either, was it?

The problem with the new API is that "offset" is counted from the latest transaction backward, while you can't know what the latest transaction is, as you haven't queried it, yet.

Edit: limit and offset isn't even working.

https://www.bitstamp.net/api/transactions/?offset=1500&limit=10
I haven't tried it yet, but maybe it works using POST parameters? The server used to be very distinctive about GET and POST parameters.

Ƶ = µBTC

Wer den Satoshi nicht ehrt, der ist den Ƶibcoin nicht wert.
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July 04, 2013, 04:09:35 PM
 #420

I haven't tried it yet, but maybe it works using POST parameters? The server used to be very distinctive about GET and POST parameters.

+1

POST instead of GET did the trick. Limit = 300000 works very fine, higher numbers will probably too. Thanks! Wink

The problem with the new API is that "offset" is counted from the latest transaction backward, while you can't know what the latest transaction is, as you haven't queried it, yet.

Very accurate.

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