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1500 questions
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1 answer

What are the main technical hurdles to implementing UTXO commitments?

Commits of the UTXO set in the block header would enable more secure lightweight clients and caps on the number of blocks that need to be downloaded and validated in the Initial Blockchain Download, which is vitally important for Bitcoin's longevity…
Amin
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Is it possible to run Bitcoin on Google App Engine? / alternatives?

This question is cross-posted on bitcoin.stackexchange, stackoverflow and bitcointalks. I'm planning to build an application on Google App Engine that will heavily make use of Bitcoin trading. I've been Googling along a little but I couldn't find…
Steven Roose
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7 answers

What is a simple explanation for how the number of bitcoins in circulation is determined?

Often times when I explain to someone that there is a limited supply of bitcoins available that need to be divided across all the people who want to have bitcoins, the people who are computer illiterate will ask how I know that the number of…
osmosis
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3 answers

Does mining a block force others to restart their work?

Does mining a block mean that anyone else who was working on mining a block loses their progress and must restart?
Casebash
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How to create the same (2 of 3) multisig adresses as electrum's multisig wallets with createmultisig?

Looking to create 2 of 3 multisig addresses with the electrum console with public keys (not the master public keys): electrum createmultisig 2 '["1st public key wallet 1", "1st public key wallet 2", "1st public key wallet 3"]' This will out put an…
electrum question
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BitInstant - How do I trade my plain cash for Bitcoin at CVS, 7-11, Walmart

On the BitInstant site, it says that I can trade in my paper money at places like CVS, 7-11 and Walmart and get bitcoins sent to me in the next 30 minutes. Can some explain how this works and what I have to do. Do I just go up to the clerk a 7-11…
Rich Westington
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2 answers

How to transfer bitcoin bought online to my desktop wallet?

Based on popular recommendations, I have started with Electrum as my Ubuntu desktop wallet and Coinbase as the way to buy bitcoin online. However, it doesn't seem like there is an easy way to transfer bitcoins from Coinbase to Electrum (not without…
Heisenberg
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2 answers

Bitcoin Core cannot obtain lock

I downloaded Bitcoin Core (64 bit) and I am still waiting for it to synchronize. But just now, when I open the software, it loads from 1% to 100% and then a message appears with the inscription Cannot obtain a lock on data directory…
pearl
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2 answers

Do any of the Bitcoin exchanges implement trading curbs?

After the big hack of Mt Gox we all became aware that there is nothing in place to prevent "flash crashes." Most stock, FOREX and other exchanges have features like trading curbs or other market volatility procedures to prevent such crashes - so do…
David Perry
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2 answers

Bitcoin privacy metrics?

I'm looking for a numerical privacy scoring system that estimate the degree of linkage between the members of a key pool (or even just individual key pairs). Ideally, the method should be easy to understand and apply. I'm aware of "taint analysis"…
Rich Apodaca
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9
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3 answers

GUI Miner for OS X?

I'm pretty new to the world of Bitcoin; though, a few months back I tried mining. I had everything working, but then I stopped.. Anyway, now I'd like to start up again, though I've wiped my computer and reinstalled OS X since then. I had been using…
James Litewski
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Which release fixed CVE-2010-5141 (attacker can spend any coin)

This post by Mike Hearn relates an interesting bit of history: When Bitcoin was first released, it contained two completely fatal bugs that made the entire system worthless. Fortunately, they were found and fixed before Bitcoin actually had any…
Rich Apodaca
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2 answers

Does Satoshidice benefit the wider Bitcoin ecosystem?

Aside from the entertainment benefit players get from the service, does it in any way help the Bitcoin ecosystem to have a large churn of small transactions?
jl6
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9
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3 answers

Historical number of full nodes in Bitcoin

Is there anybody keeping historical data regarding the number of full nodes on the Bitcoin network? There is : https://getaddr.bitnodes.io/dashboard/?days=90 but it only shows data up to 90 days. Additional sources also here…
k kurokawa
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3 answers

Testing blockchain forks

I want to test if a service can manage a blockchain fork. However there is no way to get bitcoind to create test forks under the regtest mode. I've tried modifying it to generate blocks with arbitrary prevblock hashes but it is not easy due to the…
Matthew Mitchell
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