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1500 questions
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1 answer

Why Bitcoin core creates time locked transactions by default?

I've noticed recently that Bitcoin Core is producing transactions with non-zero lock-time and sequence numbers of inputs being 0xFFFFFFFE, even though I didn't instruct it to do so. The lock-time appears to be current block number. What is the…
Martin Habovštiak
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9
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1 answer

OP_CHECKSIG: reasoning behind construction of message to be signed

I've closely studied the deservedly famous OP_CHECKSIG explanation found here, including the diagram found here. That explanation details how to construct the message that is signed via ECDSA, producing the digital signature for SigScript. All…
Pressed250
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9
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3 answers

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 not found and when I do ./bitcoin I get: bash:…
Alex Waters
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9
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2 answers

How to check if node is on TestNet or MainNet via `bitcoin-cli`?

Is there a way, by using bitcoin-cli using RPC querying, if the node I'm querying is running on MainNet or TestNet? Thanks
knocte
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9
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1 answer

Will Electrum mnemonic seeds be forward compatible with all future versions of Electrum?

If I use the newest version of Electrum (2.6.4) to create a mnemonic seed and the current source code (2.6.4) later becomes unavailable, will I be still able to use a mnemonic seed I create now with all future version of Electrum? I know that…
Nancy Smith
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9
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1 answer

Channels state validation in lightning network?

I looked into docs but didn't find any information, how do client get information about the state of intermediate channels? Since channel transactions are offchain, and only channel participants knows current channel state (each peer balance) how…
alex
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9
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1 answer

How can a transaction have more than one recipient address?

I see a lot of transactions which have more than one recipient address. Examples: Transaction 1 Transaction 2 Edit #1: I just saw a tag call multi-sig-transactions. It is obviously what I am asking for. I did not see in the clients before. How…
storyteller
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9
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2 answers

How do I use the new GPG signing feature with my Trezor?

I read here that with the new firmware, a trezor can be used to generate GPG signatures. How does that work? Is there a tutorial? I didn't see anything on the satoshi labs website.
user1794469
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9
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1 answer

How can a wager with SatoshiDICE be proven to be fair?

What steps will let a person manually verify that the DICE roll was fair?
Stephen Gornick
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9
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1 answer

What is the largest company that has ceased accepting fiat payments in favor of Bitcoin?

We know there are many large companies that now accept Bitcoin transactions (Dell, Overstock, Expedia, etc) however they still accept fiat payments from legacy credit card systems. Which large companies that have integrated Bitcoin transactions have…
254123179
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9
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2 answers

Is there developer documentation for the Bitcoin Core source code?

Is there a documentation somewhere to understand the C++ code of Bitcoin Core (available on Github) "from a to z" and being able to recreate it ?
smoumou
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9
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1 answer

Historical Bitcoin full node counts

Is there an online record of historical Bitcoin node counts? If so: When did the record keeping begin? Are IP addresses available? Did Satoshi and most early adopters run Bitcoin nodes over Tor or were their real IP addresses revealed to other…
K Chan
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9
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1 answer

Attack the network by temporarily adding hash power?

Could a malicious actor (e.g. government) attack the network by introducing significant compute power into the network, and once the difficulty grows very high, withdraw all resources from the network. This could dramatically increase the time it…
levi
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9
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1 answer

Where can I find an average transaction value chart?

I'm curious on what is the average amount of BTC transacted per transaction. I'd basically like to combine blockchain.info's Estimated Transaction Value and Number of Transactions Per Day charts. I'm writing my own script locally, but I wonder if…
Thiago Arrais
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9
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5 answers

Specific namecoin address in merged mining

I want to do merged mining with P2Pool, and I want any generated namecoins to go to a specific namecoin address in my wallet. I haven't seen a way to configure this in P2Pool or namecoind, and Google's turned up no hits. It seems as though it's…
Daniel H
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