0
votes
0answers
1 view

Enquiry about Bitcoin withdrawl

How can I withdraw my bitcoins directly to my Indian bank account because, I didnot provide my bank account.
0
votes
0answers
4 views

PSU for Bitmain Asic miner

I have a S3+ ASIC miner and 500w PSU My question is that what do I need to convert a 4+4 PCI-E into a 6+2 PCI-E or two 6+2 PCI-E. Thanks in advance
1
vote
0answers
9 views

How to verify Litecoin address

In c#, I have the method that verifies Bitcoin address. Now I want to support Litecoin as well. Is it possible to adopt this method for Litecoin? Also is it possible to write generic method for all ...
0
votes
0answers
11 views

IndentationError: expected an indented block [on hold]

I dived in Antonopoulos' book and I'm trying to recreate his proof-of-work simulation in a python terminal. However, as python noob, I always seem to get an error: >>> text = "I am ...
0
votes
1answer
24 views

First time buyer, questions before I screw up

I am wanting to buy BTC to buy goods but things are a bit confusing to me. First off, would I be better off buying from someone or a website, or use an atm? Once I purchase the BTC what is the best ...
1
vote
1answer
13 views

Coins not yet refllecting in wallet [duplicate]

i transferred coins to my wallet, but the wallet hasn't finished syncing with the network as yet, so the coins have not reflected. Is this something i need to be concerned about? Do i just wait for it ...
1
vote
1answer
22 views

Bitcoin Core Problem

To start things off I am new at this so bear with me... I have bought coins through LocalBitCoins and sent them to my wallet (with 24 confirmations). I am currently on Bitcoin Core with 2 years and ...
0
votes
1answer
17 views

Adding fixed seed nodes as DNS doesn't seem to be available

i am pretty new to bitcoin and I am trying to create a private blockchain by using bitcoind -regtest -daemon. But the executable stops, giving this message : "Adding fixed seed nodes as DNS doesn't ...
1
vote
2answers
37 views

Can I get a Bitcoin credit card?

I saw a video on youtube about a card for Bitcoin, is there a legit card service? (I am a complete noob in bitcoin so please mention links in the answers)
0
votes
1answer
6 views

Bitfinex get credits and convert timestamp to JS Date

I'm fetching my active credits in BFX and trying to discover when I'll have my funding back. This is a response example: /v1/credits [{ amount: "294.4316181", currency: "USD", id: ...
3
votes
0answers
19 views

Why does getNewAddress take so long? Often times out python-bitcoinrpc

Bitcoin 0.11 on a Raspberry Pi 2: https://github.com/jgarzik/python-bitcoinrpc I am using this RPC auth proxy to talk to bitcoind from Python. I have a script that requests getmempoolinfo every 1 ...
0
votes
1answer
24 views

I am new to bitcoin, and GUI miner won't work on slush's server

I am new to using bitcoin, and I don't have any mining hardware, just my computer. I got GUIminer, and set the server to other, and the host name to http://api.bitcoin.cz, port 8332. I entered my ...
2
votes
1answer
43 views

With Mike Hearn quitting Bitcoin, what seems to be the future or bitcoinj?

Mike Hearn has apparently sold all his Bitcoins. So what is to be expected about the development of bitcoinj? (and Java based clients in general).
1
vote
2answers
25 views

Transfer different currencies between wallets

I had SCOTCOIN in a counterwallet.io address and I transferred it to a Coinbase BTC wallet. I wouldn't have thought the transaction would have worked but it did. The amount of BTC in the Coinbase ...
0
votes
1answer
39 views

Is there any way for me to recover or reclaim a confirmed but unspent transaction that was sent to the wrong address?

I sent money to the wrong address. I am not a developer and I only understand the blockchain in its most general terms.....but I use bitcoin everyday so I have a working knowledge of it. It's hard for ...
1
vote
0answers
20 views

Send BTC with attachment using BitcoinJ

is there an example of how using BitcoinJ send BTC with an attachment? Lets say I want to write to blockchain "Vaclav Bilek Born 1991". If I understand it correctly, its just about sending minimum ...
8
votes
2answers
1k views

Who mined the infamous block 364422?

Block 364422 contains a transaction that takes a long time to verify. This transaction design demonstrates a way a denial of service attack could be executed. This prompted Gavin Andresen to propose ...
1
vote
1answer
36 views

Who benefits from mining? [duplicate]

After reading many articles, I didn't find an answer to the following. "Miners use special software to solve math problems" Okay, but for whom? Are there organizations or people that need ...
1
vote
0answers
11 views

Antmain s3 wireless?

Antmain s3 have an antenna. Does it mean you can mine wirelessly? If yes, can you give me an instruction, I would highly appreciated.
1
vote
0answers
21 views

Unspent BTC that won't go through

My transaction won't confirm. Is there a way can I get my coins back? I have been waiting over 24 hours. There isn't any options available from my block chain wallet.
0
votes
1answer
22 views

Can you reset 'used' addresses that were actually never used?

Bitcoin RPC command getnewaddress returns a P2PKH address from the keypool, and marks it as "used" so it will not be returned by the same RPC call again. I'm going to be doing a lot of testing on ...
0
votes
1answer
22 views

Restore a wallet from an external drive?

I have an external drive where at some point I did a complete backup of my (linux) home directory. There's a directory .bitcoin. I now have a computer, and I just installed bitcoin-qt and other ...
0
votes
1answer
19 views

storing bitcoin's database directory on an external drive?

I have a new-ish powerful laptop with SSD, limited to 128GB. It came with a RAID which somehow didn't work for installing linux, so I had to disable the RAID and now I have actually two 64GB disks ...
0
votes
1answer
14 views

BTC transaction issues [on hold]

Respectfully requesting to look into this transaction. Did it got confirmed or not? is been 5 days now. Thanks 18MJieFJcDiFbAsvSxe5iCaBAYsikgJta6
4
votes
5answers
455 views

How one checks which customer made a payment

One question I'm not able to properly answer when asked is How exactly the blockchain can verify the identity of the user without a centralized trusted party such as VeriSign? I know this is ...
2
votes
2answers
24 views

Is there any wallet that allows safely storing private keys in an offline computer?

I have a computer that is 100% disconnected from the internet. I'd like to: Generate my own private keys by dice rolls; Import them on the offline computer wallet; Send coins to their addresses; ...
2
votes
1answer
16 views

How do I still have connections without forwarding port 8333?

First of all, this isn't a problem I am having, I'm just curious how this works. If you run your node with port 8333 open, you'll receive a large amount of connections after being online for a ...
0
votes
0answers
11 views

What blockchain (or similar technologies) allow for “splitting” the network, offline?

There were a few ideas on how to make the blockchain hierarchical, and also splitting it to allow for splits. Are there any proposed/non implemented ideas that accomplish this with Bitcoin or any ...
1
vote
0answers
33 views

Bitcoin faucet changes Bitcoin address of users - could this be malware?

I'm running a Bitcoin faucet and lately I've been getting complaints from several users that the BTC address that is auto populated in the address bar is not their own. I auto populate a user's BTC ...
1
vote
0answers
16 views

Wallet loses the money to be restored in bitcoinj

I have a problem when using the library bitcoinj. When I restore a wallet from a backup, if it has received money in some of his addresses to synchronize with the blockchain, the money does not ...
0
votes
1answer
91 views

Are there Ethereum API wrappers? [closed]

I'm looking into developing some Go software on Ethereum and I'm wondering - are there any API wrappers around for Ethereum (something like BTCSuite's BTCRPCClient is for Bitcoin)? I know there is a ...
0
votes
1answer
21 views

How do I move my wallet from Windows 7 to a new Windows 10 machine?

Previous answers say set up a new wallet with new address and transfer bitcoins to new address, is this the only way of doing it? I don't want to wait days for the new wallet to download blockchain ...
2
votes
1answer
17 views

Is it possible to exploit the use of the same private keys on different crypto coins?

Suppose someone has single private key, and from that private key he made a public key for Bitcoin, Ethereum, Dogecoin, etc. - is it possible to figure out the private key having those multiple public ...
1
vote
1answer
20 views

libudev error while configuring cgminer on fedora 22

I am using Fedora 22, 32bit OS and have Antminer U3 for mining operations got the cgminer source code from GIT: git clone https://github.com/bitmaintech/cgminer while running ./configure ...
-2
votes
0answers
11 views

withdraw cash from ATMs with the bitcoin balance

the websites like e-coin are credibles ? we really can withdraw cash from ATMs with our bitcoin balance ? if not what are the most credible websites ? thanks in advance
1
vote
0answers
25 views

I imported my private key into blockchain.info but it says 'no free outputs to spend'?

After two days of researching I finally got my private key! However when I import it in Blockchain, it says 'no free outputs to spend'. How do I fix this?
0
votes
1answer
12 views

Bitcoin-qt bitcoin.conf location?

I have Bitcoin-qt installed and running on an external Hard Drive. Where should I put the bitcoin.conf file so I can configure it with the server setting, user, and password?
4
votes
2answers
45 views

Why can't we switch private and public keys?

If private and public keys are performing the same task (although asymmetrically), but I mean each one can encrypt something that only the other one can decrypt, can I create a paper wallet and share ...
2
votes
1answer
27 views

calculate transaction fee in a block

I want to know how one can query bitcoin core via json rpc or other methods to find all the transaction fees in a block? API queries are not useful as they have a rate limit. Here is an example ...
1
vote
2answers
44 views

Block size depending on transaction count

It's widely known that Bitcoin has a limit of 1 MB per block. However, the average block size is currently about 0.6 MB: (original data) According to this thread, Bitcoin transactions has an ...
-1
votes
0answers
40 views

I rest my computer

I reset my computer and lost my bitcoins that were attached to chrome extention called Kryptokwallet what do I do get find my bitcoin
0
votes
0answers
8 views

What power cord to use with BITMAIN PSU?

As I introduced in my previous question which no one answered I'm having some problems with bitmain's power cord So the simple main question is what power cord to use ?? I used a 250v 10-16A ...
1
vote
1answer
42 views

Why does my Antminer S7 power down right after startup?

Before asking the question I'll better introduce what I am doing: I have: Antminer S7 (Bought from BitMain) BitMain PSU (Bought from BitMain) 220V & 10-16A & 3*0.75mm^2 Power Cord for the ...
1
vote
1answer
18 views

How to add coinbase transaction with libblkmaker

I currently trying to develop a simple Bitcoin miner in c++ for a project on my university. For parsing the 'getblocktemplate'-data I'm using libblkmaker. Now I have to build the coinbase transaction ...
2
votes
1answer
18 views

Why do we need CCoins in addition to CTransactions?

As per my understanding CTransactions represents the atomic unit in Bitcoin. It has the inputs CTxIn and outputs CTxOut. Can any expert give the intuition of why we need CCoins in source code ? Why ...
0
votes
0answers
10 views

easybitcoin sendfrom not working to errors

When I try to send bitcoins via move or sendfrom nothing happends, I dont het any errors. I use a very simple script: try { $_SESSION['message'] = $bitcoin->sendfrom($_COOKIE['login_user'], ...
0
votes
0answers
23 views

Looking for best mining hardware (price / performance ratio, etc.) as of Jan 2016 [closed]

Starting from scratch with about $12 to $14K US and am looking for best mining hardware (price / performance ratio, etc.) as of Jan 2016 - - read a little about merged mining and am not clear about ...
1
vote
0answers
15 views

'QtPrintSupport/QPrinter' file not found, Dogecoin gitian build for OSX

Building a Dogecoin based Altcoin, forked right around Dogecoin 1.8.3-dev. Here's the error: ... CXX libaricoinqt_a-addresstablemodel.o utilitydialog.cpp:45:10: fatal error: ...
0
votes
0answers
12 views

Which altcoins have implemented a brain wallet that uses Warp Wallets functionality using scrypt for hashing? [closed]

Bitcoin has warp-wallet for generating a more secure brain wallet, but has any other altcoins used the same functionality in warp wallet for generating their brain wallets?
0
votes
0answers
20 views

What does it mean? [duplicate]

https://blockchain.info/ru/block/00000000000000000233ba0eca74198e0152b91c75d082d6240497b2bacd0aa9 https://blockchain.info/ru/block/000000000000000001879f26997dbc9e69c6edffc144ea5d2eda3d802f200919 ...

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