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3
votes
1answer
2k views

How can pool operators reduce the number of orphaned blocks that they mine?

Every time a pool mines a orphaned block, that is wasted effort for the pool. In an interest to increase pool efficiency and overall network efficiency, what can a pool do to increase efficiency ...
1
vote
2answers
135 views

Is it possible to transmit a tx over the network that does not go into the blockchain?

Can I somehow create a transaction that is broadcasted over the bitcoin network but will not go into a block? Might be handy for SatoshiDice like confirmations. edit: What I have in mind is ...
14
votes
1answer
1k views

Are there any pools or large miners running “child pays for parent” patch?

A feature available through pull #1647 gives the recipient of a transaction a method to help get a transaction to confirm. This feature is called "child pays for parent", and what it means is that ...
2
votes
0answers
613 views

What is “failed to read block” and how can this be fixed? [duplicate]

When I try to open my BitCoin wallet, I get a "failed to read block" message and it will not open. What does this mean and how can this be rectified?
1
vote
1answer
425 views

How did mining occur before OpenCL?

According to the Bitcoin history, the OpenCL miner was released publicly in October 2010. How was mining done before that? There were about 4 million coins mined until then, so there must have been ...
-2
votes
2answers
789 views

What improvements could a next-generation cryptocurrency implement?

What would next generation cryptocurrency would look like? What are the major weaknesses that you think we could solve? How do you envision it could be implemented technically? For example: How ...
3
votes
1answer
243 views

Custom filter for mtgox depth api request

I am looking at mtgox api documentation and specifically at Multi Currency depth http://data.mtgox.com/api/1/BTCUSD/depth/fetch It returns back the list of asks and bids and a filter criteria like ...
4
votes
1answer
5k views

Why might MultiBit not show a transaction that was sent to me? [duplicate]

So i recently bought a bitcoin from a vendor , and i had it sent to my Address in multibit. Now the problem is , the money isn't there and i'm not sure what to do. He told me to get bitcoin (program)...
3
votes
0answers
60 views

Can the Bitcoin protocol be configured to *never* rollback after a certain block? [duplicate]

Is it possible to hard code a block and its block hash into the client so that the block chain will never diverge from the main chain past that block? My thought is that this will improve confidence ...
5
votes
1answer
2k views

What's causing P2Pool's bad luck?

While looking at the current pool luck chart on p2pool.info, I noticed that the pool as a whole seems to slowly deviate from the predicted rate of finding blocks. From the other chart it appears that ...
3
votes
2answers
252 views

I want my website to accept bitcoins without dealing with security issues

I want my site to accept bitcoins (and automatically reward users with it), but do not want to deal with the security issues that would entail. Is there a SaaS (Software as a Service) which could ...
1
vote
3answers
2k views

How will other coins like LiteCoin influence market price of BTC? [closed]

More generally, in economic aspect, when new currency are issued, and be accepted by groups of people, how will the new currency affect existing currency, ignoring other factors. Ex. How will BTC ...
2
votes
1answer
112 views

Is there a reason pooled miners should revert to 0.7 due to the fork?

Can miners who mine in a pool ignore the request to revert their bitcoind to 0.7, and stay with 0.8? As far as I know, it's the pool that counts in this case. (Except P2Pool, which behaves a bit ...
3
votes
0answers
173 views

Is anyone mathematically adding a Brain Wallet key with a hosted wallet (like vanitygen) for extra security?

This question is inspired by how the Vanity Gen pool operates. Basically there are two sets of keys and addresses: one that is stored at the Wallet hosting provider, the other set is derived from a ...
18
votes
3answers
87k views

How many confirmations do I need to ensure a transaction is successful? [duplicate]

As a regular user of Bitcoin, I often send bitcoins to other, or receive BTC from others, sometimes this might be a trade or deposit. Some traders require at least 6 confirmation, some require at ...
5
votes
2answers
318 views

How can I cancel and replace a Transaction that never gets confirmed?

According this this WikiPage, a MultiSigTransaction that doesn't include a fee may never get included in a block. Since I've read that replacing Transactions (by version number or any other feature) ...
6
votes
2answers
490 views

How many different formats can a public address take?

I'm creating an offline index to report off of the block chain. I plan on indexing each transaction based on the address displayed in the TX. Are all addresses Base58? I believe I also read about ...
3
votes
1answer
186 views

Are mining pools evenly distributed across the planet?

Are mining pool managers evenly distributed across the planet? where are the biggest ones located? Like where are the servers physically located? Recently the backbone ISP for all of the Universities ...
8
votes
1answer
1k views

How was the blockchain's “hard fork” automatically resolved?

As a result of an "official" change in back-end databases from BDB in v0.7 to LevelDB in v0.8, in addition to an increase (by some mining pools) to a higher block size limit, there was recent "hard ...
1
vote
1answer
289 views

Why is bitcoin better than other electronic banking, like Dwolla or Paypal?

Why is bitcoin better than Dwolla or Paypal?
7
votes
2answers
520 views

What block numbers & hashes were discarded by the March 2013 blockchain fork?

When exactly (GMT) were these blocks mined?
4
votes
1answer
202 views

In the blockchain split of March 2013, where should miners mine, 0.7 or 0.8?

I want a clear cut answer + references so they is no confusion. Today March 12 2013, on which fork should miners mine, 0.7 or 0.8?
13
votes
2answers
707 views

What should I do about the March 12th 2013 blockchain fork?

Reddit/r/bitcoin is flooding with news that the Bitcoin blockchain has forked, in that versions 0.7 and 0.8 are accepting different blockchains. What does this mean for the users?
0
votes
3answers
4k views

Possible to estimate next difficulty based on terahashes? [duplicate]

Here is what I have estimates on: There exists hardware capable of 60 gigahashes per second. Over the next few months, X amount of these will be mining bitcoins. Difficulty is recalculated every 2016 ...
8
votes
2answers
243 views

Given the recent <0.8 bug, when can we safely have larger block sizes?

Given the <0.8 bug and subsequent fork happened because of a particularly large block, does this mean that large blocks can not be used until the large majority of the community switches to 0.8? ...
0
votes
1answer
5k views

What files do I need for backing up my wallet? [duplicate]

Is %APPDATA%\Roaming\Bitcoin\wallet.dat the only file I need to backup my wallet? I've heard about backing up every ~50-100 transactions is this correct? I thought that with the wallet.dat file, I ...
6
votes
6answers
12k views

How to get Bitcoins without having a bank account?

I'm an 18-year-old guy who wants to get some bitcoins but I don't have a Bank account yet. I've been looking at some websites, such as bitstamp.net or blockchain.info but they seem like they are ...
2
votes
1answer
214 views

Is Kim Dotcom's “Megacard” a viable possibility for bitcoin?

A week ago Kim Dotcom posted that a Bitcoin Credit Card would be something that he would be keen to support. Apart from Bitcurex, which is a different system and slightly lacking in credability and ...
3
votes
5answers
2k views

What provably fair Bitcoin gambling sites work well on a mobile?

Are there an Bitcoin-based gambling sites or apps that work on a mobile? Most of the sites seem to be assuming the player is on a full size display. If the service isn't considered "provably fair" ...
4
votes
1answer
3k views

How does the bitcoin transaction fee be calculated? And who guide this?

https://en.bitcoin.it/wiki/Transaction_fees I learned that the transaction fees is given by sender to bitcoin miners to ensure that this transaction be confirmed. But I notice that, in most ...
2
votes
1answer
283 views

How can we prevent distortion of the bitcoin exchange rate?

Is there anything within the structure of bitcoin exchanges to prevent bitcoin price distortion with multiple accounts controlled by one person? I have seen stocks with similar levels of liquidity be ...
3
votes
1answer
132 views

How is it possible to detect system wide segmentation?

In this post, MoonShadow says it's easy to detect system wide segmentation. Yet a system wide segmentation is fairly easy to detect, the current client just doesn't do it. If code implementing my ...
8
votes
2answers
1k views

Is Bitcoin's Economic Majority those who already own coins or those who will buy or keep coins?

The Economic Majority theory says that the power to control the Bitcoin protocol is held by those who [own] bitcoins. But the article then goes on to read: The ability for a protocol change to be ...
8
votes
1answer
2k views

Parameters for buy order on BTC-E

Using the BTC-E API 'm getting an error of You incorrectly entered one of fields. when I post this as the data in a buy order. {'pair': 'btc_usd', 'amount': 0.1, 'rate': 44.7084704, 'type': 'buy', '...
1
vote
1answer
271 views

Security of Bitcoind

Due to recent reports of theft activities by hackers, is cyber security is an on-going concern for Bitcoin and are active measures being taken to improve security?
1
vote
1answer
517 views

How do I view the “change” addresses in my wallet? listreceivedbyaddress 0 true doesn't work

I just sent a test account 5 BTC. I see in the output 1.38BTC was "change" and needs to be sent back to my wallet. Where can I find the contents of 1F39Qj4E3HnbnyYgan5CZa37spGfHro8eK, and was ...
1
vote
1answer
445 views

How can I prove that I destroyed some bit coins? [duplicate]

If I wanted to destroy bitcoins, and prove that it was done (with relative certainty), what would I need to do?
4
votes
1answer
3k views

technical question: receiving wallet.dat error

I have ~5 BTC on an old laptop (Windows 7) and I tried moving the balance to another client. At first I tried moving about 0.1 BTC just to see what would happen. The client debitted the balance but it ...
-5
votes
2answers
1k views

Please break it down: Bitcoin for dummies [closed]

Bitcoin for dummies: Is this like time banking/ time exchanges? Is this like barter? How do I get-earn-buy-create a bitcoin from nothing? Do I have to buy a bitcoin? If so, with what do I buy one? If ...
4
votes
2answers
564 views

Have there been case studies of how anonymous bitcoins are?

The blockchain has a lot of information about all bitcoin transactions. I've heard a lot of conjecture about how anonymous bitcoins transactions are, but I haven't seen a scientific study. Are there ...
50
votes
6answers
17k views

What is relation between scriptSig and scriptPubKey?

Scenario: A is sending 1 BTC to B. scriptSig appears in the Input Script. scriptSig = <sig> <pubKey> Here, public key is the Public Key of the sender, A. (this is the public key ...
17
votes
2answers
24k views

How can I convert a SHA256 hash into a Bitcoin base58 private key?

How can I take the output of sha256sum sudofox@ubuntu:~$ echo -n 'Hi guys!' | sha256sum 7542fb6685f9fd8f37d56faf62f0bb4563684a51539e4b26f0840db361e0027c - and turn it into a Base58Check encoded ...
2
votes
2answers
5k views

Is PPS or DGM better for pooled mining when difficulty has a high “beta”

According to this thread on BFL, BFL_Josh says PPS may be a better bet for you if you don't like variance. However if you are mining for the long haul, DGM will pay out more but your variance will ...
4
votes
2answers
1k views

What has a lower long term cost per hash: LTC, BTC or other alt coin?

I'm trying to understand the cost per hash operation with Litecoin vs Bitcoin over time. The theory is that the network that has the best prospects for long-term security (via hashing) will set a ...
8
votes
4answers
8k views

What is the economic value of Litecoin? Is it simply a subdivision of BTC?

The main differentiator between Litecoin and Bitcoin appears to be the quantity of coins available, the frequency in which the blocks are mined, and the mining technology is different. The first ...
9
votes
3answers
1k views

Do “the official bitcoin developers” control Bitcoin?

Is there one person or organization that controls Bitcoin? What if Gavin Andresen, the lead developer, or Bitcoin Foundation, "the official bitcoin organization", decide to change something? What if ...
9
votes
1answer
3k views

How is the Output script formed?

I read about Input and output scripts on the wiki here: https://en.bitcoin.it/wiki/Transactions Let's say, I use my Bitcoin - QT Program, I go to "Send Coins" tab, enter a Bitcoin Address, BTC ...
5
votes
1answer
1k views

How to run a bitcoin server with automatic restart and backup?

What would be the best way to start writing a script to automatically run a bitcoind server on an Ubuntu startup, make regular backups and restart from a backup on error. Would this normally be done ...
7
votes
2answers
8k views

How does blockchain.info's mixing service work?

Blockchain provides a mixing service. How does it work?
3
votes
1answer
4k views

How is hash160 calculated from an unseen public key?

I was looking thru Block explorer at an address with a balance. It has never been spent from thus the public key is unknown. If the public key is unknown, how can Block explorer calculate the ...

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