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8
votes
2answers
231 views

How can one know which way mining pools will vote for P2SH?

Is there a list somewhere showing how each mining pool will vote on the P2SH question? and If a pool says that it is voting one way, is it possible to independently verify that they are indeed ...
2
votes
1answer
262 views

What files one should backup when running a pool or other Bitcoin service?

There was a big problem with Bitomat at some point where that Bitcoin exchange lost its data due to some data being lost. To prevent such problems from occurring, what files should one backup? Which ...
2
votes
2answers
258 views

How many addresses does bitcoind use for Bitcoin generation?

When bitcoind is generating Bitcoins, does it change the addresses that are used for receiving the block reward? That is, if I mine two blocks with the same bitcoind wallet.dat, will the same address ...
4
votes
1answer
204 views

What .dat files are safe to be accessed while the Bitcoin client is running?

Sometimes one wants to backup some .dat files from Bitcoin, but one can't shut down the client to do so (for example, if one is running a pool). Which .dat files are safe to be copied when the client ...
22
votes
7answers
10k views

Why does my wallet need to download the whole transaction history?

I started a wallet, and it is downloading and synchronizing lots of transactions. This takes time and network bandwidth. Why is this necessary? Is this some form of accountability? With Paypal, ...
6
votes
4answers
870 views

Why are the majority of miners not voting on on P2SH?

Link (via reddit) Currently the vast majority of miners just don't vote. Was there a mistake made in organizing the voting process (maybe most miners haven't heard about this vote?), or perhaps most ...
4
votes
3answers
1k views

What public data sets are available that could used for correlation in bitcoin analytics?

What data sets exist out there that can be used for engineers to perform statistical analysis against? Hopefully this data is not needing to be scraped, but is available in an importable format or API,...
2
votes
3answers
1k views

Bitcoin pool and getwork data validity

Bitcoin pools need to check data returned with getwork for validity (proper hashing result, etc.). Bitcoind that issues the initial getworks is also able to perform some data checking, but it might ...
3
votes
1answer
605 views

Creating a custom transaction?

I am trying to create a custom transaction. I am using c# and I will code the signature code myself since no library currently allows this. The transaction involves 3 players; a buyer, a seller and an ...
4
votes
1answer
205 views

API calls - “not yet implemented”?

I tried sending some commands to my Bitcoin-QT running on Mac, and when I called "encryptwallet", I got this response: Not Yet Implemented: use GUI to encrypt wallet, not RPC command What API calls ...
3
votes
2answers
713 views

Can I get an overdraft?

Hypothetically... A uses a desktop bitcoin client, who would like an overdraft facility. B has lots of bitcoins and would like to offer that overdraft and charge interest on the overdrawn amount. ...
5
votes
3answers
859 views

What is the best way to exchange MTGUSD to USD?

Are there any better ways to exchange MTGUSD to real USD with lowest fees and the shortest time? I had mining some bitcoins and exchange them to MTGUSD at Mt.Gox. But how do I actually use the USD in ...
8
votes
3answers
1k views

What's the best way for a website to detect payments from green addresses?

Does any proven third party code exist for this? Edit* To be more specific, what I haven't been able to find out is how to get the sender's bitcoin address when receiving a transaction. As far as ...
2
votes
1answer
622 views

Miners - HTTP JSON-RPC or JSON-RPC?

Does the main miner software used currently use HTTP JSON-RPC, or JSON-RPC? That is, do they use HTTP calls to obtain getwork, or TCP/IP?
4
votes
1answer
143 views

Is two-phase encryption planned for the standard client?

Currently, the standard client supports encryption, but only for actions that change its state (send money, generate address). I would like the client to require two passwords - one to view any ...
11
votes
4answers
2k views

Is it safe to email an encrypted wallet to myself?

I'd like to setup an automated process to email my encrypted wallet to myself, so that if, for instance, my house burns down, I've got easy access to a recent copy of my wallet stored off-site. I've ...
9
votes
2answers
2k views

How secure is calling bitcoind JSON-RPC?

How secure is calling bitcoind through a JSON-RPC? For example, if I run it on one of my computers, and try calling it from another computer (provided neither of them are compromised), can someone ...
11
votes
3answers
1k views

How can I convert Bitcoins for withdrawal to PLN

For years we've been paying exorbitant fees just to transfer our own hard-earned money from one country to another. I'm in Poland at the moment and find I need to transfer funds from my US checking ...
3
votes
3answers
1k views

How do I know my wallet.dat actually already contains 100+ addresses ready to be used?

I'm using the standard commandline client (under OSX, in case this matters). I've read in some threads that it is smart enough to pregenerate 100+ addresses to be used in future when you ask them, so ...
8
votes
1answer
7k views

Installing Bitcoin-Qt on Ubuntu

I am using Ubuntu 11.10. I have downloaded Bitcoin-Qt, but I don't think it has installed itself. The instructions say "download and install" the software, but I'm afraid I need instructions that are ...
2
votes
1answer
768 views

P2Pool - I get only rejects

I started mining with P2Pool / cgminer. bitcoin-qt.exe is running. run_p2pool.exe is running. cgminer is running. But all I get are rejects. What might be the problem?
1
vote
1answer
2k views

P2Pool crashes the Bitcoin client

I wanted to try out P2Pool mining, so I installed the newest Bitcoin (0.5.2, also tried it with 0.5.1). Unfortunately when I start run_p2pool.exe it immediately crashes my Bitcoin! My OS: Win7 x64 ...
3
votes
3answers
3k views

Merge Bitcoin Mining with Fold at Home! [duplicate]

I am new, but have a big idea about bitcoin. There is a distributed computing project known as Fold at Home. What if its software were used for the generation of something instead of for a menial, ...
3
votes
3answers
541 views

Does IBB make money? Where does its earning come from?

Slightly off topic, but perhaps it is still marginally on topic because it's about a Bitcoin-oriented business: IBB is an "Islamic bank, acting according to the Sharia (Islamic law), charging 0% ...
11
votes
2answers
4k views

What are the key differences between different ways of embedding messages in the blockchain?

Are some possible ways to embed messages in the blockchain better in some sense than others? What are the important differences? (Followup on this answer)
9
votes
2answers
3k views

What are Tonal Bitcoins?

What are Tonal Bitcoins? In what application is this system of notation superior to the decimal notation? Are there any clients or other services supporting the tonal system?
6
votes
1answer
646 views

Is it possible to recognize conflicting 0-confirmation transactions with the Bitcoin client or other available software?

Is there already a way to detect conflicting 0-confirmation transactions? I'm assuming at least one transaction goes to my wallet. I would expect the client to list the transaction as conflicting but ...
4
votes
1answer
917 views

How to decode messages embedded with btcmsg?

btcmsg seems to be using proprietary software to encode and decode messages in the blockchain. Did they expose their algorithm? If they shut down tomorrow, how can someone decode messages he stored ...
10
votes
2answers
2k views

How secure are various models of Bitcoin clients?

As there was some disagreement on security of various models of Bitcoin clients in comments to this answer, I'd like to address the problem. How secure are various models of Bitcoin clients? Those ...
5
votes
1answer
811 views

Is P2Pool vulnerable to pool hopping?

Some pools / payout mechanisms are vulnerable to pool hopping. Is P2Pool vulnerable?
8
votes
2answers
1k views

Are there physical Bitcoin?

I have seen several folks selling "bitcoins" on Ebay and the like - but they are made of base metal and have no real connection with the bitcoin concept other than the symbol. I'm wondering if some ...
3
votes
2answers
1k views

Did Satoshi object to embedding data in the block chain? Why?

From this post: Our beloved Satoshi is on record that he doesn’t think it appropriate to embed data willy-nilly in the block-chain Is this claim true? If so, why did he object? I don't think it'...
6
votes
2answers
325 views

Bitcoin animation from The Good Wife S03E13

Is the Bitcoin-related animation that appeared in The Good Wife S03E13, quite similar to the one on WeUseCoins, available anywhere on the internet in full?
5
votes
1answer
2k views

When/How did Eligius “indirectly cost MTGOX many thousands of bitcoins”?

From the forum: Eligius already will accept any transaction, "standard" or not, without bias. ... Indeed, and Eligius' willingness to do so indirectly cost MTGOX many thousands of ...
6
votes
3answers
999 views

What are the implications of BIP 12 vs BIP 16 and OP_CODEHASHCHECK?

There is a discussion about two different Bitcoin Improvement Proposals - BIP 12 and BIP 16, and probably only one of them is going to be included in Bitcoin 0.6 (miners will decided which by a ...
7
votes
2answers
217 views

Can you shutdown part way through synchronization process and start up again from the same point?

Can you shutdown part way through synchronization process and start up again from the same point? When opening bitcoin software again will the process start from where it left off or does it need to ...
17
votes
2answers
3k views

Is “Reclaiming Disk Space” already implemented? How effective will it be?

Some people are concerned about the scalability of Bitcoin. The blockchain already has reached nearly 1 GB to download and store, which is not exactly in the spirit of a modern thin client, especially ...
3
votes
4answers
2k views

Can I configure Bitcoin (Linux) with a custom wallet location?

The default setup on Linux/Ubuntu has Bitcoin storing the data in the ~/.bitcoin folder, which is usually not encrypted with TrueCrypt. Suppose I do now want to rely on the internal Bitcoin ...
4
votes
2answers
334 views

Merged mining custom bitcoind

What are the core changes to bitcoind that allow one to merge-mine? Are there any new JSON-RPC commands that are enabled, or changes to the existing ones?
4
votes
1answer
1k views

JSON-RPC getwork data field

I recently tried playing around with the getwork command for JSON-RPC and I'm trying to understand what I got out of it. According to the API Call List wiki entry, the "data" field should contain the ...
24
votes
2answers
12k views

Bitcoin-Qt command line control on Mac

I'm trying to communicate with the new Bitcoin-Qt -server via a command line on Mac. I run ./Bitcoin-Qt -server, the application starts, but my terminal window is stuck on an empty line (no matter ...
18
votes
6answers
13k views

How is the exchange rate for Bitcoin established?

I noticed that there are exchange rates for Bitcoin to other given currencies. How are these rates established?
14
votes
5answers
11k views

How to validate a Bitcoin address is a real one?

Is there a code snippet that validates a bitcoin address? I'm looking for both javascript and java snippets. The code should support both testnet and real addresses.
2
votes
2answers
326 views

Mining software not using Json-RPC?

Is there some mining software out there that doesn't use Json-RPC as a communication method with the mining pool? If so, what protocol are they using?
4
votes
2answers
2k views

Help locating bottleneck on new mining rig

I built a mining rig with 3 Radeon 6850 GPUs. When I run one miner (either Phoenix or m0mchil's poclbm) it reports a hash rate of a little over 200 Mhash/sec. When I fire up a second miner pointed ...
7
votes
1answer
2k views

Is there a list of charities that accept Bitcoin donations?

Say someone wanted to donate some of their Bitcoins for charity, is there some comprehensive list of charities that accept donations in Bitcoins?
10
votes
6answers
2k views

Why can't we set fees to a fixed amount say 0.005 BTC?

The current fee mechanism is confusing and difficult to implement. The current fee system uses transaction size and the size of the block the transaction is due to appear in to calculate the fee. If ...
3
votes
1answer
1k views

Comment-to in the API

Sendfrom en senttoaddress both have [comment] and [comment-to] as arguments. Comment uses the script to put in a message, thus in a semi-standardized manner. Does comment-to encrypt the message with ...
3
votes
1answer
278 views

What is the btc.to address shortening algorithm?

How does the btc.to address shortening algorithm work? Is is a deterministic algorithm, that is, it can be reproduced on other websites with the same results, or are the results specific to the ...
1
vote
1answer
684 views

Miners dogpiling on one device

I've built a mining rig running Ubuntu 11.10 with 3 Radeon 6850 GPUs. When I run ./poclbm.py without any arguments, it returns the list of available devices as... [0] Barts [1] Barts [2] Barts [3] ...

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