1
vote
1answer
9 views

How often does a block have only one transaction?

I was looking at blocks on blockchain.info, and came across this one with only one transaction in it: (the mining reward one) ...
1
vote
2answers
17 views

How does Ripple ensure that transactions take place

I am struggling with some concepts in the Ripple system. As I understand it: After an American user goes to a gateway and loads $ into the Ripple system that he wants to send to Cambodia, the ...
1
vote
1answer
24 views

Encrypting Bitcoin private keys instead of printing out paper

I follow the procedure of making a cold storage wallet: downloaded copy of bitaddress.org using an off-line computer booted with Ubuntu from CD. Instead of printing out the private keys and ...
3
votes
2answers
36 views

How safe is bitcoin with regard to a random address generation attack?

Imagine an attacker implementing something like the following pseudocode on the fastest ASIC farm money can buy: attack(blockchain, my_address) addresses = ...
0
votes
1answer
23 views

Is there a way to figure out when an address is created?

I'm doing some bitcoin address collections. If there are some meaningful letters in the address or if the address is created in a meaningful time to me, I will buy it. How can I know when the ...
0
votes
1answer
36 views

Help me understand Bitcoin analytics

I'm trying to use the Blocktrail API to look at the oldest Bitcoin addresses to create a info graph piece - besides looking at historical transactions, what else would be good for me to analyze? \\ ...
0
votes
0answers
13 views

bitcoin and google trends to set a trading strategy

I'm interested on bitcoins and google trends, anyone know if there are similar studies to: http://www.idatavox.com/cases/bitcoin-dynamics/ ? It seems quite promising to set new trading strategies ...
0
votes
0answers
10 views

Asus R9 270x mining 24/7 setup

I'm using Asus R9270X-DC2T-2GD5 for mining and the temps remain stable at 68C or below even with 99% GPU load for hours. Stock cooling with my Cooler Master CM 690 II case with positive air flow. I ...
0
votes
0answers
12 views

How to get BitPay to process each settlement using a new address?

Since receiving multiple payments using the same address isn't safe, is there a way to get BitPay to settle the balance using a new address each time? It wouldn't be feasible for the user to log in ...
3
votes
1answer
32 views

Why does Blockchain.info's My Wallet tx volume seem to exceed to total bitcoin network volume?

I was looking at Blockchain.info's tx volume (in BTC) over the previous year. It goes from about 100k to 400k BTC per day with a peak of over 850k BTC around November. ...
0
votes
2answers
33 views

How to run multiple bitcoin RPC commands through the command window?

Yes, I can generate a new address through the bitcoin-qt command console, but how might I run a for loop to generate 100 different addresses? What kind of file does the bitcoin client take? Can I run ...
1
vote
0answers
35 views

When ASICs generate a share, is it always at difficulty 1?

Are they preset to only return difficulty 1 shares when the find a nonce? Then mining software verifies if it meets current target difficulty? Or, if given a different target difficulty, will the ...
0
votes
3answers
39 views

What happens if a TX was a double spend?

What happens if the 'High' risk option (one confirmation) was chosen and then the TX turns out to be a double spend in the end? Would the value deposited be revoked? Would the user be notified ...
0
votes
0answers
16 views

High Resolution Bitcoin Price History (every 10 seconds or better)

I need a BitCoin price history for at least the last 6 months at a resolution of every 10 seconds or higher. Just one major exchange's history would be sufficient. Does anyone know of a place I can ...
0
votes
0answers
20 views

Error trying to send payments with RPC sendmany

Need help fixing this error. Error trying to send payments with RPC sendmany {"code":-8,"message":"Invalid parameter, duplicated address I a running a NOMP mining pool that has payment job breaking ...
0
votes
0answers
14 views

Micro hobbyist trading

I am curious to know if it is possible to easily just buy $5 of Bitcoin and sell it in a few minutes, trying to make mini profits for fun or are the waiting times etc... To long? Thanks
0
votes
1answer
15 views

Does Coinbase have the ability to create a “Business” Account?

Wanted to see if anyone here knew if you are able to work with Coinbase to create a "Business/Corporate" level Accounts? Meaning that when signing up and linking a bank account to your Coinbase ...
0
votes
0answers
5 views

List of Bitcoin Exchanges that have an API that you can trigger purchase Bitcoin via ACH?

I am trying to figure out if there are any other Bitcoin Exchanges that allow you to trigger a USD to BTC transactions through ACH via an API besides Coinbase. I know that Circle allows you to have ...
0
votes
1answer
16 views

Is it possible to get bitcoin-cli without having to build all bitcoin source?

I'd like to use the bitcoin client to examine some of the inner workings of bitcoin-qt (non-invasively, using gets and lists mostly). Is it possible to do this alongside the standard executable? I ...
1
vote
1answer
16 views

How do I generate a bootstrap file on Ubuntu?

I would like to generate a Bitcoin and Dogecoin (qt) bootstrap file on my ubuntu machine. Is there any way to do this? I know it's possible with Windows but I'm on Ubuntu. Thanks.
0
votes
0answers
11 views

What is the format of the databases that are used in the core bitcoin client?

This question tells what each of the files in the bitcoin directory are, but it doesn't explain the structure of the databases used. What is the table structure (columns, data type, etc) for each of ...
1
vote
0answers
9 views

Is there a way to recover the original electrum seed from the encrypted one?

So I accidentally lost my electrum seed and password, but I still have the wallet file, so I was wondering if there is a way to recover the original seed from the encrypted one? I think my password ...
2
votes
1answer
12 views

Is there a JavaScript library for validating P2SH addresses?

I looked at coinstring.js but it looks like it only validates simple BTC addresses (1-prepended addresses). isValid(base58str, version) Validates whether the address string or wallet import ...
0
votes
1answer
19 views

BTC = $ … Does this have to match the sum I'm buying for at an auction?

very new, so this is probably silly but: I want to buy some bitcoin on an auction, but the exchange rate on MultiBit is very slightly dissimilar to the rate offered by the seller on the acution. Will ...
0
votes
0answers
7 views

Is the a library for generating signatures and transactions for scrypt coins?

I'm looking for a library similar to this bitcoin one but that works with scrypt based coins.
0
votes
0answers
5 views

Multibit wallet receiving addresses

I would like to receive bitcoins with multiple addresses, not having to use same address all the time. After I generate a new receiving address in my wallet do I need to back it up again? (Copying ...
0
votes
1answer
12 views

I am trying to get cgminer on Ubuntu 14.04 and the Guide is troubling me

Okay, I am trying to follow this instruction guide: http://www.distrogeeks.com/install-cgminer-3-7-2-ubuntu/ and the 20th step did not work because it could not find the server. I downloaded it from ...
0
votes
0answers
15 views

Forgot password multibit

this is two weeks I am trying to crack my MultiBit portfolio, I do not remember my password recorded in July; I have no old file save my wallet, the word must be no more than 15 characters and must ...
0
votes
0answers
13 views

Armory can't find blockchain files produced by bitcoin-qt

Armory is telling me to restart the application using --satoshi-datadir=[path] But I don't understand how to do this? I'm running MacOSX. I know where the blockchain is. How do I start Armory with ...
1
vote
0answers
13 views

Get just a “reject” string without detaied imformation when submitting a new block

I submitted a new block using the rpc command submit. And I just got a "reject" string without any reason. I checked the bitcoind source code, found usually it always sent the reject reason and only ...
2
votes
0answers
13 views

What is OP_CODESEPARATOR used for?

Looking at the bitcoin source (https://github.com/bitcoin/bitcoin/blob/v0.9.3/src/script.cpp#L843-L847, specifically), I ran into the the use of the OP_CODESEPARATOR. Am I right in interpreting this ...
2
votes
1answer
24 views

Is BIP analogous to RFC?

It seems that a BIP (Bitcoin Improvement Proposal) is very similar to an RFC (Request for Comments). Can anybody confirm this, or describe major differences in the two approaches?
1
vote
2answers
32 views

Why does txID generation consider signatures?

I've been reading a lot about transaction malleability, and noticed that the only way to achieve it is by altering the transaction signature/s. Why does the protocol even consider the signature in ...
2
votes
3answers
130 views

Papers/Books on how bitcoin works from a mathematical perspective?

I'm a math student interested in Cryptography. Is there any paper or book which explains, in mathematics and cryptography terms, how bitcoin (more general, a digital cryptocurrency system) works? In ...
0
votes
1answer
19 views

What is min time to get first confirmation for transaction?

How much time does it take to get first confirmation for transaction? I don't need the exact number of minutes, just some useful approximation. I found this chart of average confirmation times, but ...
0
votes
1answer
15 views

Multisignature: what happens if the number of signatures exceeds the “threshold” number of public keys?

Let's say a coin has been locked with a 2-of-3 challenge script. In other words, spending the coin requires two signatures, each of which matches one of three designated public keys. Now I try to ...
1
vote
1answer
23 views

Can wider acceptance cause the value to fall?

I've noticed lately that more vendors/companies are accepting Bitcoin: Microsoft being one of the latest and largest. As far as I can tell, though, these companies seem to (mostly) immediately ...
0
votes
0answers
59 views

How were my Bitcoins stolen? [closed]

Just logged in this morning and saw that I lost $69.58 on my blockchain.info account. I didn't use my account yesterday, (I logged in just to check) but I never used it since I had no transactions ...
1
vote
3answers
24 views

Are there any hardware privkey/pubkey generators out there?

I don't mean hardware wallet like Trezor but simply a device that is non-programmable, and not network connectable but will generate key pairs (+ the associated address would be handy but that could ...
0
votes
1answer
24 views

Is Coinbase.com combining / commingling transactions or funds?

In this transaction, I transferred 2 BTC from my Coinbase.com wallet to an external address. Why are there 3 outputs in the transaction? I understand the output of 2 BTC, and the 0.0001 BTC ...
0
votes
1answer
34 views

2 bitcoinqt - getrawmempool returns different results

I have 2 servers with running the same Bitcoin Core v0.9.3.0-g40d2041-beta (64-bit). I use getrawmempool to get all new transactions in the same time but I have different result. One server always ...
0
votes
2answers
50 views

Coins sent while wallet closed

I opened my wallet after almost a year and all of a sudden I see 2 transactions saying I sent coins to someone. The address it says I sent to is 1PAZw2aNgurapsxUVm8ctZDD76v7JiwQkC however I never ...
1
vote
0answers
18 views

Bitcoin, detecting deposits to the node.js server (code review)

I'm trying to detect deposits that user will made. I explained it with comment lines in below. Can you are there any flaw in it? var _ = require('underscore') var check = function(client, site) { ...
0
votes
1answer
12 views

How to get Bitmain U3 running on Linux?

Ubuntu Server 11 I have downloaded the bitmain branch of cgminer and compiled it to using CFLAGS="-O2 -Wall -march=native" ./configure --enable-bmsc I have also downlaoded the official 4.9.0 and ...
2
votes
1answer
53 views

Technical analysis of Blockchain.info security breach

I the news I read this: The firm was forced to make a security disclosure on its blog and on Reddit, admitting that a development error had led to a problem with the generation of private ...
3
votes
2answers
55 views

Can you inherit bitcoins without the private key?

Since the private key is needed to validate ownership, how does it work when you cannot access the private key? Say X owned bitcoins and willed it to Y, but Y does not have X's private key. Say X's ...
1
vote
2answers
34 views

Is Bitcoin given as a gift taxable?

Question by someone who is new to Bitcoin. Bitcoin mining is considered taxable income in the US. However, if it's given as a gift, then should it be taxable under US law?
0
votes
0answers
11 views

Any guide on how to implement and compile zerocoin protocol for an Altcoin (SHA256d)

I tried to find a suitable Guide on How to implement and Compile Zerocoin Protocol for an Altcoin based Algo SHA256d. If anyone know how to do it, please share with me. I have seen the folder ...
0
votes
1answer
10 views

Question about BTC-E fee's

I'm looking into trading on btc-e but can't find too much info on the trading fees. All I see is a general 2%. Is there a fee for trading btc in or out? What else is there? What's the 2% calculated ...
0
votes
1answer
21 views

Funds and Wallets

If I load bitcoins to my wallet and the funds are there, and I go back to load more Bitcoins with a new address for my wallet are the funds from my first wallet going to merge with the newly added ...

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