1
vote
0answers
5 views

Multibit Won't Open

I have NOT done any kind of system restore (don't have the hard drive space for that) The multibit application won't open. I tried installing the latest version, didn't seem to do anything. I've ...
0
votes
0answers
18 views

Bitcoin payout based on real-life event

Just starting to learn bitcoin scripting. Can someone explain how to pay out based on some real-life event? I currently test from the command line with bitcoind -regtest
0
votes
1answer
18 views

Is there any regulations on buying and selling Bitcoin on eBay?

I see a lot of people selling Bitcoin on eBay. Since the government began regulating exchanges, are there any rules you have to follow now to sell Bitcoins on a site like eBay? Additionally, are there ...
2
votes
2answers
193 views

Must a Block contain a coinbase transaction?

Must a block contain a coinbase transaction? If so, how is this enforced?
-4
votes
0answers
21 views

How do i ask someone to mine Bitcoin for me? [on hold]

I looked and there are only mining contracts under 1 GH/s And i want around 800 GH/s For free. Can someone help.
0
votes
2answers
25 views

When will next halving events occur?

I've read in some places that the next halving event will be on 2016. How can this be estimated?
1
vote
1answer
11 views

Programmatically validating NXT addresses

where can i find a script or snippet of code where I can validate a NXT address?
0
votes
0answers
5 views

What is a public NXT api i can access?

Is there a public site where you can access the nxt api? like how blockchain.info does it. all i want to do is make queries to retrieve all the messages in the nxt network to see the activity.
1
vote
1answer
13 views

is bfgminer running correctly?

As a complete newbie I purchased USB ASIC mining device, installed bfgminer on raspberry pi and tried to run it. As the reward is not changing, I am wondering whether bfgminer is running correctly. ...
0
votes
2answers
6 views

Question about bitcoins

I have small question, where does bitcoin "banks" keep money you pay them for bitcoins? do they keep it in some kinda bank ? and when we sell bitcoins to dollars what fee do we pay?
0
votes
1answer
34 views

How vulnerable are offline users of bitaddress.org, who don’t use Ubuntu?

By not installing Ubuntu and not removing the hard drive, I suppose I am vulnerable when I open bitaddress.org offline and enter the 64 random hexadecimal characters I have generated without a ...
9
votes
1answer
857 views

Is the threat of computer malware to steal Bitcoin exaggerated?

Some months ago I put a small amount of Bitcoin into an account and wrote the address and private key into a text file. I have left on my computers and on those of a couple of friends. The money ...
0
votes
0answers
13 views

What are the 'historic retailer milestones' in Bitcoin adoption?

The History page doesn't list ANY retailers that accept it. Care to help by adding a few historically significant retailers to the list? Clearly Overstock and Dish should be on there, but I'd like ...
1
vote
1answer
19 views

How does the receiver of a transaction check the whole chain of ownership?

While reading Satoshi Nakamoto's paper on how bitcoin works, I got stuck on #2. In a chain of transactions, how can someone who has received the coin check the whole chain with just a signed hash of ...
0
votes
1answer
19 views

What shape of merkle tree does the Bitcoin client build?

The Bitcoin client builds a merkle tree to represent the transactions, then includes the root of that tree in the block header. But usually, the number of transactions is not a power of two. When ...
2
votes
0answers
37 views

Accelerated block generation

According to http://btc.blockr.io/ : Height Block created Transactions Block fee Size (kb) Days destroyed 318525 2 minutes ago 28 0.00370000 8.36 kB 2.00 318524 3 ...
0
votes
1answer
7 views

Can you transfer NXT assets directly to another nxt account?

I purchased a few mgwBTC (multigateway bitcoins) and I want to be able to transfer them to my other account. Is this possible? Can someone take a snapshot of how this is done? thanks.
0
votes
0answers
26 views

How to log onto bitcoin?

I logged onto Bitcoin couple days ago. I got as far as setting up a bank connection. I received in my bank account the two mini-deposits of Bitcoin had sent to verify the link. I tried to log onto ...
0
votes
2answers
36 views

How many OP_RETURN transactions in the Blockchain would be too many?

I realize this question may not have an answer and therefore might not be suitable for SE, but I'm very curious about OP_RETURN transactions. OP_RETURN transactions appear to be the accepted ...
0
votes
0answers
36 views

Standardize wallet format

What's the status of wallet format standardization? Is there any proposal or work-in-progress around? If not, how come nobody urges to define standard wallet formats yet? This is especially needed ...
0
votes
0answers
98 views

For people like me who missed the “Bitcoin train”, what form of investment would be the best at this point?

Like many others, I ignored bitcoin completely since the day it started. I thought it was a scam and didn't want to read more about it. After seeing how many people actually use it, I decided to do ...
0
votes
2answers
39 views

Is Bitcoin a developer only currency and community?

The Bitcoin repo on Github has 7 members. Ultimately, they decide what bug fixes and pull requests get merged. I don't understand how this is decentralized? Yes, it is open source, so anything they do ...
1
vote
0answers
13 views

How to detect a rejected transaction?

If the nodes I connect to don't support the BIP 61 reject message, how do I know that my transaction was eventually rejected by the network (e.g. due to my bugs)? Is there any timeout or whatever ...
0
votes
2answers
25 views

getbalance not working

I am getting this error when I type getbalance: error: {"code":-1,"message":"std::bad_alloc"} Basically, I type getbalance and wait for about 2 minutes and this error appears finally. What does it ...
2
votes
3answers
55 views

How can I search for transaction text on the blockchain?

Is there a google like search engine which can search for any text that is included with a bitcoin transaction? As I understand it each transaction includes 80 characters of text as well. Update It ...
0
votes
2answers
33 views

Payee identity verification

When reading the Bitcoin paper by Satoshi, I noticed that he didn't mention any protocol by which the payer can verify the payee's identity, i.e. he is indeed paying the intended recipient. I would be ...
-1
votes
0answers
27 views

Running many bitcoin miners [on hold]

I wish to run many bitcoin miners , and of course , I would require a lot of LAN wires. As such , I would like to ask if there are any simpler ways to run many Bitcoin Miners using only a few network ...
0
votes
0answers
15 views

Overview of Blockchain 2.0 smart contracts for the layman?

I have a pretty good understanding of how the Blockchain secures data using hashed inputs of the previous block and being secured by the P2P distributed network. What I'm interested in is a layman ...
0
votes
0answers
11 views

BIP32 wallet sync with Bloom filters

I'm working on my SPV library and I still have a hard time figuring how to approach the BIP32 + Bloom filters combination. Here's how I currently sync an existing HD wallet (after fast catch-up): ...
0
votes
1answer
29 views

Why does the script contain the hash of the public key

The ScriptPubKey contains the hash of the public key, and this is compared to the public key in the ScriptSig. It is not possible to derive the public key from the hash (address). But when the output ...
2
votes
2answers
90 views

Defeating email spam with Bitcoin

There was a paper somewhere proposing a scheme for filtering email spam with the use of Bitcoin micropayments. I can't remember where I saw it and can't find it now. Anybody knows about it?
0
votes
0answers
3 views

How can I view all the NXT nodes that I can access publiclly?

Where can i find a list of NXT IP nodes that I can connect to publicly? I want to be able to use them as a backup connection to the nxt blockchain if my own nxt server crashes.
1
vote
1answer
33 views

New to Bitcoin - tips on securing my server

I regard myself as being a competent programmer and have good general IT knowledge; however I know very little about BTC. I just want to make sure that my setup is "generally secure" and that I'm ...
2
votes
3answers
51 views

Bitcoin vending machine

If I wanted to build a vending machine where one could buy a cola paying with bitcoin, is the following scenario the typical way to do it? Customer approaches the machine, and selects the product ...
1
vote
1answer
22 views

Running Multiple Full Nodes on one Host

simple question. I would like to run several full nodes for Bitcoin, Litecoin, Darkcoin and so on, but don't they run on the same port (8333)? Will this just work or do I need to give them several ...
3
votes
1answer
90 views

What does “Safe mode: Warning: The network does not appear to fully agree! Some miners appear to be experiencing issues.” mean?

My bitcoind client that runs on testnet has started returning a lot of errors today. It has been doing so for a few of hours (as of 2014-08-29 9:50 UTC). When I call it via RPC, I get the following ...
0
votes
2answers
32 views

Passphrase lost for my wallet.dat

Need help is unlocking my passphrase. I dont remember setting up one, but now there is a pasphrase. Eitherway I am unable to send out coins from my Litecoin QT to the exchange. Any help will be ...
0
votes
0answers
6 views

Can I force the Bitcoin core client to keep the blockchain on another drive instead of AppData/Roaming? [duplicate]

I have been profiling my disk space and found that the blockchain has become pretty big 25GB or so. I would like to force the core client to save the chain on another drive that is much larger. Is ...
0
votes
1answer
15 views

WIF Format and Storing Private Keys

I'm writing an Android app which will be storing private keys for Bitcoin and a few Altcoins in an SQLite database. To store my private keys, I was initially using the WIF. When I take them out of the ...
1
vote
1answer
25 views

Get a JavaScript notification when Bitcoin transaction arrives to a certain address

I'd like to implement a very simple address monitoring feature on a site I'm working on. I'd like to just be able to say "Listen to this address on the testnet for money to come in", and update the ...
-3
votes
0answers
47 views

What The Heck Do These Mean? [on hold]

I am relatively new to BitCoin and I have decided that I want to start mining them using my PC. While the 'BitCoin Armoury' wallet was downloading, I looked up some pools that I could join. Here's ...
0
votes
0answers
16 views

How can I refund from btc-arbs.com?

The title says all. I've invested some money in BTC-Arbs.com last year. Now it's down. how can I refund?
1
vote
1answer
53 views

Is it correct that more than 160 bits of input data for producing a private key are superfluous?

If this is true, when I make a 64 character hexadecimal private key I need only provide randomness for the first 40 characters (40 x 4 bits per character = 160). The remaining 24 characters can be ...
2
votes
0answers
27 views

Maximum number of transactions in wallet.dat for Bitcoin Core

I know that a large number of key pairs in wallet.dat is not a concern. But is having too many transactions in wallet.dat an issue? Can Bitcoin Core start crashing after it reaches a certain number ...
1
vote
2answers
21 views

Are time, timereceived and blocktime in UTC?

I read around about the differences between time, blocktime and timereceived, but one question remains. Although I assume all times are UTC, I haven't seen that mentioning specifically anywhere. Does ...
0
votes
0answers
15 views

When you sweep a private key at Blockchain can you sweep the key in HEX format?

It would be useful to know this because I have made a 64 character hex private key by hand and generated the address without storing the key in WIF format. I don’t want to go online, input the hex key ...
0
votes
0answers
11 views

what are BTR points in Bter exchange

what are BTR points in Bter exchange? Can we convert BTR into an alt-coin? If so, is there any fees they charge. How many times can I exercise this option for a particular month?
1
vote
2answers
61 views

Is there a way to buy bitcoin immediately?

I want to use PHP to write a script to buy bitcoins and my bitcoin balance will be updated immediately (i'm NOT in US). For example, I use my credit cart to purchase bitcoins. less than 1 min later, ...
1
vote
1answer
16 views

Any advantages in terms of our location & East-West timing differences for self mining on a 100 th/s btc rig

I do live in india.. I believe that bitcoin mining rig owners are very lessaound us ..I read some where that we will be able to mine more bitcoins while the west or far-east sleeps..
1
vote
1answer
46 views

Why should I pay in bitcoin as opposed to traditional payment methods?

Recently I have seen a few online stores starting to accept bitcoin as a payment method, but I can't think of a reason why I would ever want to pay in bitcoins. Since I get paid in GBP then I would ...

15 30 50 per page