All Questions

Filter by
Sorted by
Tagged with
17
votes
3answers
3k views

Is there a way to undo transactions with a “too low” fee?

Suppose we reach a state where only transactions that pay a fee are accepted by miners. Further supposed that someone created a transaction using an old/odd client that allowed them not to send any ...
21
votes
4answers
8k views

How can one find how much “room for arbitrage” is there in the Bitcoin market?

I don't know what's the mathematical/economical definition, but I would define "room for arbitrage" as the amount of money that can be extracted from the market by doing arbitrage (between the ...
8
votes
3answers
328 views

How can you find out what is the latest block number?

When running a fresh client, or after not being connected for a while, the client takes some time downloading new blocks. How can you find out what is the target block number (the id of the newest ...
28
votes
7answers
3k views

How can one download the bitcoin client securely?

What is the correct procedure to download the official bitcoin client, and validate it was signed by the developers, and not infected with any malware by a man in the middle?
5
votes
2answers
823 views

Why am I getting this make error w/ 0.4.0rc1 on Ubuntu

Building 0.4.0rc1 in Ububtu via make -f makefile.unix returns the following errors/warnings: ui.cpp: In member function 'virtual void CMainFrame::OnIconize(wxIconizeEvent&)': ui.cpp:488:25 ...
9
votes
4answers
2k views

Decentralized escrow functionality built into Bitcoin?

AFAIK there are a few websites out there that offer escrow services for Bitcoin. Those however are central, i.e. I have to "trust" them. Is it being discussed, is it theoretically possible, or does ...
20
votes
1answer
4k views

How do Scripts work?

Bitcoin protocol supports scripts. How do they work? How are those implemented? What are their intended usages? When are they planned to be used?
7
votes
1answer
322 views

How does a recipient know they can satisfy the transaction script to spend their bitcoins?

The wiki page on the transaction script says: The party who originally sent the Bitcoins now being spent, dictates the script operations that will occur last in order to release them for use in ...
24
votes
2answers
4k views

Useful alternative Bitcoin transaction scripts

The Bitcoin wiki describes a transaction's script as something that describes "how the next person wanting to spend the Bitcoins being transferred can gain access to them". The script for "a typical ...
13
votes
1answer
830 views

What is the meaning of the Bitcoin address version?

Bitcoin address versions are described on the Address wiki page: Normal addresses currently always start with 1, though this might change in a future version. Testnet addresses usually start with m ...
14
votes
2answers
677 views

How could recurring payments be implemented?

I pay for some things on a regular basis. They generally fall into two categories: Things I pay for or lose, eg a variety of online services (Spotify for example) Things I'm legally obliged to pay ...
15
votes
1answer
643 views

Is Bitcoin suitable for fast transactions, eg in shops?

Let's say all usability problems were solved. I'm imagining something like shops with tills that present QR codes for the amount and payment address for a transaction, and mobile clients exist that ...
11
votes
7answers
1k views

What additional benefits can QR codes bring to Bitcoin applications beyond payment requests?

Anyone who has recently used one of the Bitcoin wallets on a mobile device (and some desktop clients) will have seen a Bitcoin QR code. Clearly, QR codes allow for a succinct method for transferring ...
14
votes
2answers
1k views

Tax implications in Canada of buying and selling Bitcoins?

What taxes should be paid in Canada on Bitcoin transactions? Has anyone gotten official advice on this? Is it relevant whether the Bitcoins were mined, received as payment for services, bought and ...
8
votes
2answers
3k views

What happened to Krad Miner (the first javascript GPU miner)?

Krad Miner was the first javascript miner that supported GPUs. Now, the website yields a 502 error, and there has been no response to post #57 in the thread asking about it being dead. Does anyone ...
8
votes
2answers
8k views

Is it possible to generate bitcoins with a Google Chrome extension?

I just came across Rlweb's Bitcoin Generator, a Chrome extension that claims to be the "first google chrome extension creating Bitcoins". This extension looks quite shady to me, they don't even have ...
12
votes
1answer
271 views

What security features are built in to the standard Bitcoin software?

I have read much of the Bitcoin algorithm and its encryption basis, however little has been said of the software's inherent security. What solutions are already built in to the software, and what is ...
15
votes
3answers
989 views

Can the number of transactions per second ever overwhelm the network?

I'm coming at this from a point of view that assumes Bitcoin has been widely adopted as a currency worldwide and is essentially mainstream. Every day people are using Bitcoin in the same way that they ...
10
votes
1answer
716 views

How to build Bitcoin from source on Ubuntu 11.04 Natty Narwhal?

We have this detailed tutorial for Lucid Lynx, but somehow it doesn't work for Natty. We also have a similar question but it is too broad and the solution there isn't complete enough to work. I ...
16
votes
1answer
2k views

Why are coin miners (such as GUIMiner) a “threat” in Windows Defender?

I opened up my GUIMiner and I got a rather unfriendly "Win32/CoinMiner" threat of "Medium." I installed this program knowingly, so should I be concerned? Is this just a problem because people have ...
25
votes
8answers
3k views

How can a single person operation keep a collection of online wallets secure?

While this question is similar to others about securing wallets, I think it merits a question of it's own. One thing that has dissuaded me in the past from running an online wallet service of some ...
12
votes
2answers
4k views

Java library for Bitcoin Client Application

are there Java libraries for Bitcoin available to develop client applications?
17
votes
1answer
353 views

What are the risks of exchanging Bitcoins via Near Field Communication?

What are the risks of exchanging Bitcoins via Near Field Communication? The transaction Parameters might be negotiated via NFC and the actual transaction via Internet.
13
votes
2answers
346 views

What are the minimum security expectations of an online wallet service?

If you wanted to assess the security of an online wallet service such as a bitcoin bank or ewallet, what would expect to see addressed? Obviously SSL connections, but what about authentication, ...
19
votes
1answer
2k views

What protection does Bitcoin have against Denial of Service (DoS) attacks?

What protection does Bitcoin have against DoS attacks? Could you bring down a node by flooding it with data? What happens if someone starts flooding the network with legitimate, yet nonsense, ...
13
votes
1answer
850 views

What is GLBSE? How does one use it?

What is the Bitcoin Global Stock Exchange? How can one use it effectively?
13
votes
1answer
2k views

How do I configure the Bitcoin client for SSL on Windows?

Specifically I would like to connect to bitcoind from an outside system but I'm concerned about security. I've seen where others have said that SSL support is built into the Bitcoin client but how do ...
11
votes
2answers
6k views

Exactly how does one calculate how many BTC they will get a certain hashrate?

I am curious on how many estimated BTC I will earn at any hash rate since, I don't really think I'm really earning any BTC at 600 Mhash/s.
38
votes
3answers
5k views

Who runs www.bitcoin.org?

The original client that can be downloaded from www.bitcoin.org is often referred to as the "official client". Similarly many regard www.bitcoin.org as the "official homepage" of the project. So, who ...
38
votes
3answers
43k views

Can I use my wallet on different computers?

I'm used to synchronize my data on different machines. Depending on the data I use SVN, Dropbox or SSH (Unison). Is this possible with the bitcoin wallet, too?
23
votes
2answers
6k views

How can I compute mining profitability? [duplicate]

It was asked elsewhere, but I'm re-asking the question in a less time sensitive way. Can you please list some of the techniques, charts, spreadsheets, calculators or other tools that help someone to ...
30
votes
6answers
3k views

Why doesn't Bitcoin return lost coins back into the block reward?

The idea of putting back lost Bitcoins back onto block rewards seems like a great idea. I acknowledge that there were quite a handful of early adopters who were generating blocks daily, but had no ...
36
votes
6answers
8k views

How do I reduce the size of the block chain data on my machine?

The block chain file is getting rather large, ~500MB. Is there a way to trim it or clean up, or maybe configure it to be limited in the future? I am using the stock Bitcoin client on Ubuntu.
11
votes
2answers
1k views

Why is my client software not receiving bitcoins?

I've just installed the official bitcoin client for the first time on my PC and have visited a website that gives free bitcoins. I've been waiting for more than an hour, but the amount given to me is ...
8
votes
3answers
4k views

Why do I get `bitcoind: command not found` in Ubuntu?

I have built the bitcoin source on my Ubuntu desktop, and have installed the proper libraries via apt-get and building some. When I do: cd src bitcoind -daemon I get the error: bitcoind: command ...
19
votes
2answers
13k views

Why can't I get over 8 connections on my client?

How do I make my client acquire more than 8 connections? What settings in firewall and operating system, or flags at execution do I need to use to allow it?
23
votes
4answers
2k views

What is the difference between BitCoin, Bitcoin, and bitcoin?

I've seen several capitalizations of the term "bitcoin". What do all these mean?
11
votes
2answers
592 views

What are the problems with naive pool sharing mechanisms?

@David's comment on this answer suggests that naive approaches to mining pool management don't work. What attacks are possible on such naive approaches, such as every miner gets a share proportional ...
8
votes
4answers
494 views

Is there a Drupal shopping cart interface for Bitcoin?

Is there any Drupal SCI for Bitcoin available? Either tied into Ubercart or, more preferably, Drupal Commerce.
48
votes
7answers
10k views

Is there any way to track an individual bitcoin (or satoshi)?

For example, if I wanted to "collect" important bitcoins is there any way to track a coin rather than a series of transactions? If I wanted one of the bitcoins from the infamous "Bitcoin pizza" ...
28
votes
2answers
7k views

Is there some way to merge two wallets or to import/export addresses?

I've got one wallet.dat from my laptop and another on my desktop, each containing various (different) receiving addresses that I use pretty often. I'd like to merge them into a single wallet.dat so I ...
25
votes
1answer
27k views

How can I start my own mining pool?

Is there some relatively simple (and preferably free/open-source) solution for starting my own mining pool? How close to "turnkey" would such a solution be and with pool operators mostly running at 0% ...
17
votes
1answer
466 views

IPv6 support status

What is the current status of IPv6 support? From what I gathered reading the Wiki, protocol specifications support IPv6, but the original client does not. However, I also came across the description ...
37
votes
5answers
6k views

How can one remain relatively anonymous while using Bitcoin?

Bitcoin transactions are pseudo-anonymous. What can an individual that uses Bitcoin do in order to remain as anonymous as possible?
10
votes
3answers
707 views

How can I find out the address my payment will come from?

Can I find out the address I am going send from before making a payment? And could this be useful for merchants that want to identify my transaction?
-3
votes
4answers
1k views

If I convert my US Dollars to Bitcoins, will its value likely depreciate? [closed]

Is it worth converting 'normal' currency into Bitcoins with the hope of making a profit later, by converting the Bitcoins back into 'normal' currency? In other words, could it be seen in a similar ...
19
votes
6answers
1k views

Does flattr complement or compete with bitcoin?

I realise that the underlying technologies for Bitcoin and flattr are different, but do they serve the same purpose? For example: if I set up a webapp that uses micropayments for revenue (like github ...
21
votes
4answers
1k views

Are there any fundamental security vulnerabilities in Bitcoin?

Although Bitcoin does its best to prevent double-spending, could it still happen in practice? Is it just very unlikely that fraud could happen, or is there a mathematical proof that it could never ...
14
votes
4answers
4k views

Is there empirical data about a relationship between bitcoin price and difficulty?

There have been claims that Bitcoin price and difficulty correspond. Is there empirical data to support or refute this?
11
votes
1answer
5k views

How do I build Bitcoin from source in Linux?

I am running an Ubuntu Virtualbox, how do I build Bitcoin from source and run it in this environment? I'm using the build notes from the bitcoin core github and I get the following errors when trying ...

15 30 50 per page