0
votes
1answer
5 views

Error: Wallet backup failed! (code -4) when setting up bitcoin-qt for first time

I downloaded and ran bitcoin-qt to play around with. First thing I did was create a wallet passphrase. The second thing I did was try to create a wallet backup. Then I got this message: Error: ...
-1
votes
0answers
10 views

How do I transfer my money in the bank into a bitcoin? [duplicate]

I see all of these different websites for bitcoin wallets, but I can't tell if they're legit. i'm so confused. Thanks!
1
vote
1answer
10 views

Is it true the genesis block reward can't be spent forever?

The Wiki says, The first 50BTC block reward went to address 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa, though this reward can't be spent due to a quirk in the way that the genesis block is expressed in ...
0
votes
0answers
13 views

Logos cannot make connections or download blockchain [duplicate]

I have downloaded Logos' source code mentioned below links, I have also able to create the Genesis Block of that. The GUI application shows zero "active connections" on bottom right corner icons. It ...
2
votes
2answers
123 views

Can an attacker create many nodes that approve blocks without work?

There are currently about 7000 nodes in the Bitcoin network. The security rests on the fact that someone adding nodes would have have to expend CPU power to hash transactions. What prevents someone ...
0
votes
1answer
9 views

I am not able to connect to download blockchain in logoscoin. It shows active connection, I am also attach debug logs below:

2015-01-24 06:18:15 Logos version v0.8.6.4-ga5aedeb-beta (2015-01-22 22:29:38 -0800) 2015-01-24 06:18:15 Using OpenSSL version OpenSSL 1.0.1f 6 Jan 2014 2015-01-24 06:18:15 Default data directory ...
1
vote
1answer
22 views

Does createrawtransction accept scriptPubKey and redeemScript as inputs?

According to the built-in RPC documentation the signature for createrawtransaction is: createrawtransaction [{"txid":"id","vout":n},...] {"address":amount,...}. Gavin in his example on 2-of-3 ...
0
votes
0answers
15 views

json_rpc_call solo mining with bitcoin running on Windows 7 for antminer

I setup BitcoinD on a Windows 7 PC. I configured for defaults except user/pw and rpcallowip=192.168.1.0/255.255.255.0. have also tried 192.168.1.* with no luck. I ultimately want to use an Antminer ...
4
votes
1answer
46 views

Precisely what did Mt. Gox do wrong?

Everyone likes to trash Mt. Gox. There is a ton of hearsay out there. Can someone produce real evidence of their poor business practice? I was hoping to find their old website FAQ for example. ...
1
vote
0answers
2 views

How to restore a backup made when using the big 20 Gigabyte Core Wallet to current MultiBit wallet?

Been running an s3 with slush's pool for a month or so and accumulated maybe 20% of a Bitcoin. I started out using the gigantic Bitcoin Core Wallet because when I first learned about Bitcoin a couple ...
1
vote
1answer
14 views

What are the limitations to an outdated backup?

My backup private keys were made in Jan and my computer crashed in May. If I upload the keys on a new wallet, will it show my bitcoin balance from May or January?
1
vote
1answer
16 views

What are bitcoin/altcoin block notifications?

While setting up a private nomp mining pool as a learning project, The instructions recommended setting up block notify. What are block notifications?
4
votes
2answers
71 views

What changed about coinbase.com to make it a “regulated exchange”?

It's all over the news that coinbase today is opening "will open the first regulated bitcoin exchange in the U.S.". But what exactly is the news here? Hasn't coinbase been serving customers from ...
0
votes
1answer
32 views

What exactly are Bitcoins? [duplicate]

I've heard the term several times. I know that it's an online currency, but I'd like to know more, without having to search too hard. My main questions: What can bitcoins be used for? Where does one ...
1
vote
0answers
44 views

I want to accept bitcoin on my raspberry pi

I have a web server running on a raspberry pi and I want to accept bitcoins. I have very little disk space so I don't have room to install bitcoind. I don't trust any third party services to process ...
0
votes
1answer
18 views

LTC Pool With Friends?

Is there a way I could set up my LTC mining pool so that my friends could join? I've been having really good luck lately!
0
votes
1answer
21 views

What roles of WIF(Wallet Import Format)?

I am reading "Mastering Bitcoin" written by Andreas and I found this explanation about "WIF(Wallet Import Format)" Key Formats Both private and public keys can be represented in a number of ...
0
votes
0answers
17 views

Downloaded electrum, restored an old wallet, now BTC are stuck. How can I get them out?

How can I send them or reset password? Everytime I try to send it says invalid password. I tried by a couple different ways without luck. I deleted the wallet. Then I downloaded again and created ...
2
votes
1answer
42 views

Is there a fixed order for all transactions in the block chain?

Every block in the block chain contains a list of transactions. This list has a certain order which is basically set by the miner introducing the block. The merkle root in the block header requires ...
0
votes
0answers
16 views

Has anyone ever used LibertyX?

I have recently heard of LibertyX (libertyx.com)which is buying bitcoin in person at certain retail locations. It has a similar vibe to localbitcoins however they only accept cash. Has anyone used ...
2
votes
1answer
55 views

UPDATED: -25 when pushing multisig

I am trying to push this correctly signed 2/3 multisig to the network (based on Gavin's example) and I get RPC_VERIFY_ERROR = -25, //! General error during transaction or block submission: The ...
0
votes
0answers
7 views

Any efficient way to broadcast pending transactions?

A user creates and signs a transaction & broadcasts it to his linked-peers, the peers then rebroadcast it again without necessary receiving an inv message, then creating a flooded network with ...
1
vote
1answer
33 views

pycoin command line transaction

Is there a quick way to do transactions knowing only the private key(secret exponent) and the destination address, preferably from a command line utility such as pycoin? I am using Debian/Ubuntu and ...
1
vote
2answers
156 views

Bitcoin spend before received

When browsing the Blockchain I came across this address. It seemed peculiar to me, that the amount of 0.6 BTCs has allegedly been spend before received. Is it because the "receiving transaction" ...
1
vote
1answer
10 views

What are pros and cons of txindex option?

I am reading "Mastering Bitcoin" written by Andreas and I found this explanation about "txindex option" Transaction Database Index and txindex Option By default, Bitcoin Core builds a ...
1
vote
0answers
11 views

Is there a source for historical LTC trades available?

From bitcoincharts.com can download historical trade histories for BTC on various exchanges vs various currencies. Where can I find something comparable for LTC? I want to get historical trades ...
0
votes
0answers
23 views

Bitcoin Core shows error message

I have used Bitcoin Core for over 02 months it ran so smooth, but today i open Bitcoin Core and it show error message like this image: Bitcoin Core (OSS GUI client for Bitcoin) has encountered a ...
1
vote
2answers
69 views

Can an exchange work which does not have control of the private keys?

It seems like there is really no great way to exchange USD for BTC. Having to trust an exchange with your private keys is undesirable. I'm wondering if there is a way to utilize the convenience of ...
0
votes
0answers
12 views

New user looking to purchase bitcoins [duplicate]

So I am new to this whole Bitcoin deal, how do I get my own bitcoins?
1
vote
1answer
58 views

What is a block?

I know bitcoin has a block chain that is from my best representation a list of blocks. I know the block holds many transactions. But i'm still very much lost as to what a block is and how a block can ...
1
vote
1answer
33 views

What is criteria of mining priority except for transaction-fee?

I am reading "Mastering Bitcoin written by Andreas" and I found this explanation of mining. Transactions are added to the new block, prioritized by the highest-fee transactions first and a few ...
-1
votes
1answer
25 views

PCI Riser causing GPU to crash

I just got a new PCI extender (which is a flexible one) for my graphics card as I've built my own custom "desk pc". Now I don't really mine on it, but I do play games and whenever I start playing for ...
2
votes
2answers
37 views

If block sizes go up, won't sigop limits have to change too?

Gavin Andresen, one of the core developers, has discussed increasing the block size to 16.7 MB (and doubling that every two years). The maximum number of signature operations per block is currently ...
1
vote
1answer
13 views

Ability to Send Bitcoins to an Address over a duration of time

Is there a service or upcoming feature which lets you send Bitcoins to an address over a duration of time? I can write a script myself to send 1mbtc every day to an address and leave it running on my ...
2
votes
2answers
45 views

How do you send to multiple addresses by paying a one time fee? Which wallet supports this?

I have 20+ addresses I need to payout to. How can I send to all of these addresses without having to do it one at a time and paying a fee for each? Which desktop and mobile wallet supports this type ...
1
vote
0answers
28 views

Is it possible to run a simple attack on a previous version of the client in testnet mode?

I need to simulate an attack locally or in testnet (if possible) for academic purpose, on an old and bugged version of the bitcoin core client. I am in posses of test BTC in the last version. I want ...
1
vote
1answer
32 views

I'd like to connect an LKETC USB Scypt Miner to my Raspberry Pi. Help?

I am new to bitcoin mining, but pretty good with technology as a whole. As a Father/Son project, I recently purchased a couple of USB LiteCoin Scrypt miners (I bought them here: ...
0
votes
0answers
19 views

Fatal error: Uncaught exception 'Exception' with message 'Invalid Response'

Fatal error: Uncaught exception 'Exception' with message 'Invalid Response' in C:\xampp\htdocs\jsonRPCClient.php:155 Stack trace: 0 C:\xampp\htdocs\jsonRPCClient.php(87): ...
3
votes
1answer
31 views

Is it possible to make PoW ASIC-resistant through dynamically generated hash chains?

Bitcoin's static proof-of-work function SHA256(SHA256(data)) was apparently easy enough to be implement as ASIC which lead to the re-centralization we see today. But what if the PoW function changes ...
0
votes
1answer
18 views

Signature on transactions with multiple inputs

My question is that, suppose there is a txn tx(k) paid from user u to v, that refers two txns tx(i) and tx(j) as it's inputs. Also, both these inputs are meant for different public keys of u, say, ...
1
vote
2answers
50 views

How to use the bitcoin client without downloading the blockchain?

I would like to be able to use the bitcoin python client to be able to do things like sign transactions offline, create transactions, create multisig transactions, etc. Is there a way to do this ...
0
votes
0answers
27 views

Bitcoin-QT blockchain: your speed experience with using any HDD connected via USB2.0 with TrueCrypt?

Background (I've never used bitcoin before.) I have Bitcoin-QT 0.9.3 (zip version). bitcoin-qt.exe sits on the internal HDD of my laptop. All of the other stuff (blockchain, wallet,...) on a 128GB ...
0
votes
1answer
40 views

What does it mean when a block is “kicked”?

While mining on a NOMP mining pool, I noticed that when you add the confirmed blocks and pending blocks together, they rarely add up to the total blocks found. It is my understanding that the missing ...
3
votes
2answers
458 views

How is that concurrent miners do not subvert each other work?

Every time new block is added on top of block chain, the miners have to restart their work because next block has to have proper reference to previous block. Lets suppose that there is some nonce for ...
0
votes
1answer
38 views

Given a block, is there a list of all hashes for all possible 2^32 nonce values?

I am working in a computational research lab, and we're taking a look at Bitcoin. I'm trying to develop a simulation of Bitcoin mining for a nonexistent computer architecture. I want to simulate the ...
1
vote
1answer
25 views

How to reissue a currency you own in NXT Monetary System (Sidechains)?

I registered a monetary system currency on the NXT platform and made it exchangable as one of the properties. But now I want to make it reservable for a crowdfunding campaign. How do you reissue the ...
1
vote
1answer
27 views

Is it necessary for all miner to reset minig when the tip of blockchain has chenged?

Each block in blockchain contains a pointer to previous block (block header). If multiple blocks reference certain block as their parent, only the one that is part of longest chain is accepted. ...
3
votes
2answers
47 views

How are unconfirmed transactions divided into different blocks?

According to https://bitcointalk.org/index.php?topic=216938.0 one transaction can only be contained in one block. If I understand correctly, miners can freely decide what transaction they include in ...
0
votes
0answers
37 views

How can counterparty tokens be distributed?

When a new counterparty token is created, are they all created at once? Or can there be a custom distribution schedule? Basically, I'm wondering if all counterparty tokens are centrally distributed or ...
1
vote
1answer
29 views

How do text, scripts, and other information get embedded inside the blockchain?

Someone recently suggested that scripts could get embedded inside the blockchain and executed independently by designated machines. What exactly can get stored inside the blockchain, and what are the ...

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