0
votes
0answers
16 views

Vertcoin Node.js programming

This is an npm (node.js) module for connecting to an exchange https://www.npmjs.org/package/btc-e I was wondering if there is anything out there for connecting directly to Vertcoin To buy/sell ...
2
votes
2answers
43 views

Who would accept confirmations of invalid transactions in a 51% attack?

My understanding is that honest nodes work on the longest valid block chain. Suppose a dishonest node confirms an invalid transaction. If that node manages to continue producing confirmations at a ...
2
votes
2answers
94 views

can I spend/transfer bitcoins directly from cold storage?

From reading previous articles I understand that you can receive bitcoins to an address even if your wallet is in cold storage because the bitcoins sent to this address is recorded by someone on the ...
-2
votes
0answers
8 views

Does know of any specific Binary Options Websites where I can trade Bitocins? [duplicate]

Ideally I'd like to be trading bitcoins. I just signed up here and it seems to be going okay. http://www.citrades.com/lp/bitcoin-free-signals/en/?campaign=416
-1
votes
0answers
22 views

Binary Options for Bitcoins [closed]

Does know of any specific Binary Options Websites where I can trade Bitocins? Preferably not a scam
-1
votes
0answers
14 views

Why NXT does not allow special characters in alias name?

It is quite ugly to see long sequences of words without spaces, dots, underscores or dashes because the alias can only be any string of latin-character numbers and letters..
1
vote
3answers
60 views

How many bitcoin clones are out there? [duplicate]

How many bitcoin clones are out there? I mean people changing the name, the hashing algorithm and a few more parameters and creating a new coin that just keeps on copying bitcoin's source code in ...
-1
votes
0answers
188 views

Antminer U2 on Raspberry Pi w/ BFGminer, no devices found

I'm a complete beginner to bitcoin mining. I have an Antminer U2 connected to a powered USB hub connected to my Raspberry Pi, and I'm trying to mine just for fun (power costs are not an issue). ...
2
votes
1answer
42 views

Who has copied or reimplemented Ripple?

There have been almost an infinite amount of Bitcoin clones, but I have yet to see a Ripple clone or a Peercoin clone for that matter. I'd include Nextcoin, but I don't think the full source has been ...
2
votes
1answer
35 views

Check if wallet is encrypted or not through RPC API

How can one check if their wallet is encrypted through the RPC API without receiving an exception? I went through the Original Bitcoin client API calls list but didn't find any command that could ...
-1
votes
0answers
16 views

How to fix “H-not-zero” error cgminer

While mining with cgminer I get the same reject error and have not been able to get an acceptances [2013-09-14 19:02:12] Rejected 88dde730 Diff #/1 GPU 0 (H-not-zero) What are some suggestions to ...
0
votes
1answer
25 views

Can a double spend attack be obfuscated by mimicking the transactions seen before the fork?

An attacker controls the majority of the hashing power and wants to double spend without arousing suspicion. If they mirror the public chain's activity while generating the private fork and the fork ...
4
votes
2answers
124 views

What is the variable in a block that holds hash of found PoW?

Can anyone please tell me, which variable holds the hash of the solution of block's PoW in broadcasted block? I know that a block consists of (I am pretty sure I am forgetting some variables here): ...
0
votes
1answer
48 views

How to make a simple payment with the python-bitcoinlib?

I've been using the bitcoin-python library for making payments from within Python. This worked pretty simple: >>> import bitcoinrpc >>> conn = bitcoinrpc.connect_to_local() ...
0
votes
0answers
10 views

GPU not recognised on CorsAir cables, works normal on original

I have Chieftec Navitas 1000W PSU that has only 2 common GPU outputs http://www.chieftec.eu/en/psus/navitas-serie/gpm-1000c.html I want to connect additional GPUs via molex but with PSU I got only 1 ...
4
votes
0answers
63 views

Are sidechains really new?

People have been talking a lot about side chains, but I thought this has been around for a while under a different name. Coins like Namecoin, Devcoin, ixcoin, i0coin, groupcoin, etc are all merge ...
1
vote
3answers
130 views

Is there a way to run bitcoind without being a full node?

I want to be able to run bitcoind on a VPS I rented, but I neither have good bandwidth nor RAM so I do not want to be a full node. How would I go about configuring things so that I can run bitcoind ...
0
votes
1answer
23 views

Tracing Bitcoins to their original blocks

Can I find (always, without fault) the specific set of blocks from which the Bitcoins that I hold originated? If yes, would such a trace-back be computationally costly?
0
votes
1answer
49 views

How to calculate the minum recommended hashrate for p2pool network?

I'm trying to add the current minimum required hashrate for miners on my p2pool frontend. I've seen such calculation for the litecoin network here. For litecoin with quite a high p2pool rate and a ...
1
vote
4answers
76 views

Get latest Bitcoin transactions in real-time

How is it possible to get the latest transactions txid in real-time? I mean to implement something similar to what blockchain.info does on its homepage. How do they do it to get all transactions info ...
1
vote
1answer
51 views

How to get instant notification of any Bitcoin transaction involving a specific public address as recipient without knowing the wallet or private key

Everything is in the title... For instance, Blockchain can do this if you import a public address and you set up their notification mechanism. Is there a way to do this in an intelligent (=efficient) ...
1
vote
0answers
20 views

JSON/RPC works fine for bitcoind but not for litecoind

I have managed to set up bitcoind, connect to its JSON/RPC API and run the getinfo command. I followed exactly the same steps and configuration for litecoind (bitcoin.conf and litecoin.conf contain ...
0
votes
1answer
51 views

RPC server with bitcoin-qt and bitcoind has a different set of commands?

When running bitcoin-qt -server, I am able to run the getbalance command, and the help command shows many items: ~ > bitcoin-qt -regtest -server # Running in another shell ~ > bitcoin-cli ...
5
votes
1answer
100 views

How is a side-chain merging back to Bitcoin chain protected against double-spend? Where are the side-chain mining fees?

I am struggling to understand the concept of "side-chains" that's discussed a lot lately, but never trully explained. How I understand "side-chain": it's an altcoin, with a separate blockchain, with ...
0
votes
0answers
19 views

blockchain.info Wallet My Transactions not showing

When I log into my blockchain.info Wallet My Transactions are not showing. I transferred 3 Bitcoins to my Wallet 7 days ago and they are also not showing.When I go to www.blockchain.info/address/my ...
-1
votes
0answers
6 views

Bitcoin accept on web site [duplicate]

We are owner of investment company. We want to accept bitcoin in our web site, please let us know about your system and I highly appreciate if you answer our questions: At first: Do you have any ...
0
votes
1answer
49 views

Bitcoin peer to peer network source code

Does anybody know a place to get the source code of the Bitcoin Peer to Peer network? I only need the P2P network portion of the Bitcoin protocol. I am going to implement a new virtual currency. So i ...
2
votes
1answer
35 views

Is it possible to have complete cold storage in NXT?

BTC has capability to create new account on offline computer and send some coins to and from that account without ever going online. Sending coins to that account is trivial. Sending from that ...
1
vote
1answer
26 views

Bitcoind, Multisig, and the default account “”

I've been attempting to do transactions to and from a multisig address for a couple of days, but I'm finding that my default account "" keeps paying for things, even though I'm explicitly saying other ...
-1
votes
1answer
50 views

Two GPU's But Only One Will Mine In cgminer

I have a rig with two GPU's set up in it. Both are ASUS and one is a R9 280x and the other is a HD 7790. Both appear when I run the command: sudo aticonfig --lsa GPU 0: This is the HD 7790 GPU ...
-1
votes
1answer
73 views

Was the claim of finding 180-200k bitcoins MtGox issued confirmed?

On March 2014, MtGox allegedly reported the finding of 180-200k bitcoins "lying around" in some wallet. Was it really confirmed? The amount of speculation and click-grabbing media reports make it ...
1
vote
0answers
27 views

Tx to a multisig address in testnet not working

i've sent a tx to a newly created multisig address on testnet, but i dont understand why i didnt get the funds yet. What i've done to so far was create 3 separate wallets, and get the 3 pubkeys to ...
1
vote
1answer
53 views

For maximum mining performance, is it better to minimize latency from the mining rigs to the p2pool server, or from the p2pool server to the Internet?

I'm setting up a p2pool server to mine Scrypt-based coins on. Mostly just for myself, but occasionally some friends will jump in. I'll mostly be mining newer coins with very low difficulties. I'm ...
0
votes
0answers
15 views

Implementations of Merkle Tree and related algorithms

I want to build a C++ implementation of Merkle Trees, but I want a reference to check if my implementation is correct. What are the libraries that allow Bitcoin to implement Merkle Trees? Is there ...
1
vote
1answer
35 views

Is Bitcoin full decentralized network or how client connect to the network?

I read that Bitcoin is full decetralized network, but I don't understand how Bitcoin's client can connect to the network. I think that client must use some server for this action like other P2P ...
-1
votes
0answers
36 views

Proof of Work Wallets [closed]

I'm currently thinking out a project that would involve cryptocurrency on some level. An idea occurred to me with the potential with this possible coin exchange system. Is it possible to implement a ...
0
votes
0answers
11 views

Rational for unique transaction address [closed]

I wonder why in the design of Bitcoin, a transaction uses a unique transaction address (couple public/private key if I understand it well). Would it not be possible to build a secure banking system ...
-1
votes
1answer
35 views

Using blockchain to publish downloadable software verification codes

What is the point of comparing sha256 of downloaded file with published on the same website code? Why can't developers of currencies publish file version and sha256 hash on blockchain as alias or ...
4
votes
1answer
44 views

What is the point of comparing sha256 of downloaded file with published on the same website code? [closed]

Some websites publish sha256 to check authenticity of downloaded file. I suppose this is to protect against man-in-the-middle attack - that my file was not altered during download. What prevents ...
-1
votes
0answers
44 views

What legal requirements are necessary for a Bitcoin exchange? [duplicate]

I have the complete codebase for a new exchange called transcrypt.io (if you wish to use it in the future). We have a ton of improvements over current exchanges and hope to release as soon as ...
0
votes
0answers
12 views

Why are broadcast checkpoints considered bad?

warren, a LiteCoin dev, said of Peercoin: Good Luck Removing PPC's Centralized Checkpoints Regarding PPC... these amount to empty obfuscating defensive excuses. Sure he wants to remove the ...
8
votes
1answer
102 views

Heartbleed bug and Altcoins

Bitcoin recently released V 0.9.1 patching vulnerabilities from the Heartbleed bug, however I have not seen anything from any alt coin. What are the possible security risks associated with using these ...
0
votes
1answer
32 views

Icarus Detect Failed

I have been running raspberry PI with 4 Erupter modules connected to Pi Hub for 5 days with no problems. Yesterday I checked the modules and the idle lights were on and there was no mining. I ...
0
votes
0answers
14 views

Bitcoin Transaction's Historical and Geographical data

Just thought if anyone outthere ought to know where I can get access to Bitcoin Transaction's Data? (geographical + historical data on them). I've been working on my final year project and this, or ...
1
vote
1answer
17 views

Is it possible to create a system for 'shared wallets' on top of bitcoin?

Is it possible to build a system on top of bitcoin, where: Random people will deposit money in a wallet X. Nobody has access to that wallet. After a few months, those users will vote in other ...
0
votes
1answer
41 views

How to obtain trades from the websocket transaction feed?

I am having a hard time figuring out how to extract trade information (i.e. a payment relative to an offer) from the Ripple websocket transaction feed. From my current understanding, I guess there ...
2
votes
1answer
37 views

How can I download the blockchain from own, trusted source?

I have two computers with two different bitcoin-qt wallets: Very heavy-weight desktop with a great internet connection. Less powerful laptop with relatively slow internet. I would like to download ...
1
vote
0answers
30 views

Can I download blockchain updates from somewhere?

I use Bitcoin only on rare occasions - say once every month. I want to avoid long waiting times for downloading and verifying blocks that consequently await me when I reopen bitcoin-qt. There are many ...
-4
votes
0answers
13 views

I need to make atleast 1 Millibit? [duplicate]

Faucets not paying enough, provide clear advice pls not this and that. Thanks my wallet : 1P3VyY2X68AZe4xcJzYVN39gzsaKdsHrnq
1
vote
2answers
77 views

Can ASIC miners easily be used to guess brainwallet passphrases?

After reading the Bitcoin wiki page for brainwallets it seems to me that mining equipment can be used to brute force brainwallet passphrases. Is this correct? "...so hackers can collectively try ...

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