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901  Bitcoin / Bitcoin Discussion / Re: A immature thought about bitcoin note on: May 21, 2013, 05:05:37 AM
Also the company promises to pay the note-owner the bitcoin once requested.

Assuming these are for circulation (and not single-use notes), how do you protect against a counterfeit of your bitcoin note being produced from someone who held the note previously and submits it to you for redemption?
902  Bitcoin / Development & Technical Discussion / Re: Reminder: zero-conf is not safe; $500USD reward posted for replace-by-fee patch on: May 20, 2013, 03:21:06 AM
Is it conceivable that a judge could conclude that because the miner was running this replace-by-fee code and received compensation for doing this that the miner could liable for losses by the merchant? [Edit: or charged as an accessory to the crime of fraud even?]
903  Economy / Service Discussion / Re: Dwolla to anything quickly? on: May 19, 2013, 12:08:35 AM
Does anyone know a quick Dwolla USD to BTC method now,

You aren't going to like this ..
Withdraw Dwola to your bank account, and use those funds to buy on Coinbase.

But you might find a trade on #bitcoin-otc marketplace.

Or try finding someone on the Dwolla thread maybe.
904  Economy / Service Discussion / Re: Check if transaction is sent from wallet on: May 18, 2013, 11:33:02 PM
Since it is impossible to double spend and the company is pretty trustworthy how could you determine if a transaction was sent from with the standard bitcoin-qt client?

When a spend transaction occurs, that transaction is relayed to peer nodes, and each peer then relays the transactions to its peers.

So when you Bitcoin-Qt/bitcoind client node receives that transaction, it most likely was several relay hops away from the sender.   The transaction does not include IP information, so there's no way for your node to know any IP information except for the IP address of the node which it got the relayed transaction from.   

So there is no way for your BItcoin-Qt/bitcoind client to know that the transaction was first relayed by's server. itself does show that the transaction came from its own server (reported as Relayed by IP:, but that's because they collect information above and beyond what is sent with the transaction.

You make an incorrect assumption though that a transaction spent using is impossible to double spend.  You can export the private key of a bitcoin address and use that to try a double spend race attack against the transaction.  It isn't often successful, but occasionally can be successful.  (A race attack can be successful perhaps one in 50 attempts, for instance, ... or greater than that or worse depending on various factors.)

905  Bitcoin / Meetups / Re: Bitcoin 2013 (San Jose) Update and Friday pre-meetup on: May 17, 2013, 09:23:18 AM
On that note, since today was such a success I thought it would be smart to set up another meetup for tomorrow (Friday) at 4:00 in the Marriott Bar...

I had walked in the Tanq bar at the Marriott around 5:35 pm but didn't see any group.  Neither the server nor bartender knew of any group there, but had said a group left a bit earlier so I assumed I had just missed everyone.      What you might want to do is let the server and/or bartender know that if any arriving guests are there for Bitcoin, which table(s) you are at.

906  Bitcoin / Meetups / Re: [ANN] Going to Bitcoin Conference 2013 San Jose, CA (Rollcall & Hotel Choice) on: May 16, 2013, 09:49:20 PM
Is there a confirmed meeting spot and time for those gathering ahead of the 6pm GigaOM meetup?   e.g., 4pm at a lounge in the Marriott or something?   I've already bumped into a couple bitcoiners wandering the streets ...  just putting out a place and time is likely to result in a gathering.
907  Bitcoin / Bitcoin Discussion / Re: Here is the Seizure Warrant on: May 16, 2013, 07:01:25 PM
"On May 9, 2013, the Honorable Stephanie A. Gallagher issued a seizure warrant for the contents of the Mutum Sigillum LLC account at Wells Fargo, based on the forgoing information."

I wonder if Mt. Gox knew this.   It is possible Wells Fargo simply blocked Mt. Gox from any access to their account and didn't provide info if there were an inquiry, and thus Mt. Gox wouldn't know the funds had been seized.  But if Mt. Gox was aware of the Wells Fargo account being seized it might have been nice of them to share that info with the community.

[Update: So, there were two separate account seizures.   Nobody in the media cared to discuss the May 9th Wells Fargo one?]
908  Bitcoin / Bitcoin Discussion / Re: Sorry to bother you with another potential worry but... on: May 16, 2013, 06:48:49 PM
As I understand it, the biggest mining pools essentially determine which client to follow, and we trust them to always do what makes the most financial sense to them.

Not true.

On March 12th BTC Guild had many blocks mined using the v0.8 client.  Abandoning v0.8 meant a direct hit to their profits as a result of solved blocks that they'ld no longer receive the mined coins for.

What made BTC Guild switch to mining on the pre-v0.8 side of the fork? 

The response to one question ... "What side is Mt. Gox using?"

Mt. Gox recognizing mined coins on the pre-v0.8 side meant those coins would have value and the v0.8 ones would not.    So BTC Guild honored the will of the economic majority.

Now Mt. Gox doesn't automatically represent the economic majority, but in this specific instance hardly any of Mt. Gox's customers would give a care which action Mt. Gox took regarding this hard fork, so Mt. Gox essentially had sufficient representation that there didn't need to be any temperature taking to see where the economic majority stood, ... it was known immediately that v0.7 was the side of the fork that the economic majority sided with.

909  Economy / Gambling / Re: - The World's Most Popular Bitcoin Game on: May 16, 2013, 06:34:53 PM
It would have been really nice if you guys posted that on your website today. I bet 3 btc, completely unaware of this and have received nothing back, nor a response from your support. Are you just taking the funds sent and running? What gives?

SatoshiDICE has no way to know from which jurisdiction a payment was sent.  The bitcoin network doesn't track, record or report that info.  Your wager is no different from anyone else's wager.
910  Bitcoin / Mining / Re: How many ASIC miners are in operation? on: May 16, 2013, 06:28:48 PM
So anyone got a guess how many ASIC devices are out there right now in operation? If you do try and show some working out of how you got to you conclusion Smiley

Back in February, before the first ASICMINER chips went into production which was just before the first two Avalon ASICs shipped, there were 22 Thash/s of capacity.   Today there is 85 Thash/s.   Even with the rising exhange rate, there is likely less GPUs mining bitcoins today than in February since there was probably more that defected to Litecoin (due to Litecoin mining being a little more profitable than Bitcoin mining even, over the past couple months) than came online since February.  And almost nobody is buying FPGAs anymore.  So it is probably safe to conclude that about 63 Thashs/s of ASIC mining capacity has come online. 

I don't know the distribution as far as how much is ASICMINER's that they are using for their own mining, versus the shipments of Avalon ASICs and BFLs.

If that capacity were all Avalon ASICs, that 63 Thash/s would represent about a thousand units (and they've not shipped anywhere near that).
911  Bitcoin / Development & Technical Discussion / Re: Tracking new payments to address: please help on: May 16, 2013, 03:19:27 AM
How to poll the client
Could you please provide steps/commands?

The listsinceblock API command will return txids of all transactions since the block specified.  So if the block specified (by its block hash) is the last block received then the txids returned will be those in the node's memory pool.

Then from the results of that, getrawtransaction [txid] on each will return the info necessary to determine if the transaction has an OUTPUT to the address you are monitoring.

Here's the API calls list:

Here's a link to an example of accessing the API using Python:  (examples of other languages are on the same article)
912  Bitcoin / Development & Technical Discussion / Re: Tracking new payments to address: please help on: May 15, 2013, 12:02:27 PM
What is a command line for bitcoind, to find, if payment arrived to a given address?

If it is not an address in the wallet, then you will need to poll the client to learn of new transactions and then for each do a getrawtransaction to determine if the address is one that you are monitoring.

913  Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore on: May 15, 2013, 11:32:25 AM
Keyword being LEGAL tender.

You are misunderstanding the term "legal tender".

A medium of payment allowed by law or recognized by a legal system to be valid for meeting a financial obligation.

So that doesn't mean using anything else to pay is illegal, it simply means I cannot force you to pay in anything other than the medium defined by law as legal tender.   If you and I want to trade using seashells (which are anonymous, and can be traded anymously), that is not using legal tender but it most certainly is not prohibited by law.
914  Economy / Gambling / Re: [BITLOTTO] Mar 1 draw over $2000 or 50BTC! Tickets now 0.1 BTC for Apr 5 on: May 15, 2013, 11:12:27 AM
I may be ambitious, but I want something like this to continue,

The draw for me (no pun intended) was that this could operate really inexpensively.  Since the blockchain was used for wagers, there was really very little overhead.  So a lottery that was provably fair and had 99% payout was for the first time ever, possible.

No there is really little noticeable difference between 99% payout and 98% payout.  So you get with SatoshiDICE the same potential payout (e.g., 1 in 500 chance of winning but a ~500X return on your wager) with only a slightly lower vig.

So there's really less need for a BitLotto to exist anymore.   The dopamine hit from SatoshiDICE comes sooner than the weekly lotto.
915  Bitcoin / Bitcoin Discussion / Re: Bitcoin 2013: The Future of Payments - San Jose, CA - May 17-19, 2013 on: May 15, 2013, 11:01:36 AM
Side topic possibly some Pizza for the crowd

Incidentally Saturday, May 18th, is the 3rd anniversary of Laszlo's offer to pay 10,000 BTC to have 2 pizzas delivered to him.

There were some nibbles but nobody confirming they would do a deal, so three days later Laszlo asks:
 "So nobody wants to buy me pizza?  Is the bitcoin amount I'm offering too low?"

And following that a deal was struck. Two pizzas delivered for 10K BTC.
916  Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore on: May 15, 2013, 10:55:37 AM
Im not a law expert so grant me that.  But in most developed countries, sending anonymous payments to anonymous users, tax free, and/or using an alternate currency within those borders is absolutely a violation of law.  It is in the US for sure.

FinCEN just provided guidance stating that Bitcoins can be used to pay for purchases from merchants.  

This is irregardless of the merchant remaining anonymous and/or the customer operating anonymously.

So, anonymous payments to anonymous users is most certainly not something FinCEN has indicated that it has any problem with.   Now, of course, if that transaction incurs a tax obligation, simply because it was paid using Bitcoins does not remove any obligations, so taxes would still be do.  But that doesn't make using Bitcoin illegal.

Care to clarify your statement?  
917  Bitcoin / Bitcoin Discussion / Re: Why Homeland Security might be the best thing to happen to Bitcoin on: May 15, 2013, 10:44:21 AM
Okay, as an American

You might want to put an asterisk on that statement:

Would anyone be interested in a Bitcoin meetup here in Milano?
918  Bitcoin / Development & Technical Discussion / Re: [pull] Remove send to IP address and IP transactions support on: May 15, 2013, 10:28:31 AM
Sorry for necrothread, but to bookend this thread:

As-of v0.8.0, the Bitcoin-Qt/bitcoind client no longer includes the code for IP transactions.
919  Economy / Service Discussion / Re: In reality, it may be cheaper not using Dwolla on: May 15, 2013, 03:16:42 AM
I think Coinbase is going to get a lot of Dwolla's business now.

Yup.  If Coinbase hadn't gotten their cash infusion (last week's $5M investment round), I would have been more concerned about this development with Dwolla. 

It still leaves us with too few methods to easily transfer fiat to and from bitcoins.

I'm hoping to learn a little more about Ripple over this weekend.  Hopefully we can start solving this problem ourselves in a manner in which a piece of paper from DHS has no impact.
920  Economy / Service Discussion / Re: Dwolla no longer allowed to deal with Mt. Gox? (DHS Shut them down?) on: May 15, 2013, 02:41:22 AM

3) DHS didn't seize anything, they simply stopped Dwolla from doing business with GOX

You must have a different definition of "seize" than the rest of the world.

Dwolla called it what it is ... "seize":

seizing the account of Mutum Sigillum LLC (“Mt. Gox”),

Also, Camp BX still allows Dwolla transfers, so the following is specific to Mt. Gox:

The bottom line is that you cannot convert BTC into USD via Dwolla, that's all.
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