0
votes
0answers
1 view

GPU VanityGen with AES Encryption?

I'm getting back into Bitcoin and have started pooling savings together into a wallet. I'm moving on to cold storage and need to order some metal cards to keep safe somewhere. I need to generate an ...
0
votes
1answer
22 views

Have I lost my Bitcoins?

Ill start from the beginning. Im really new to bitcoins so being naive ive jumped in downloaded a wallet (bitcoin core) got my adress and set of buying 1 bitcoin. Now I bought the bitcoin and it all ...
0
votes
2answers
10 views

Where is the code making OP_RETURN a standard transaction type?

I am looking through the bitcoin github history. I am trying to find the commit where OP_RETURN became accepted as a standard tx. This was included in the changelog for Bitcoin Core 0.90. Any help ...
1
vote
0answers
12 views

Why aren't block solutions sent to a multicast address?

In computer networking, multicast (one-to-many or many-to-many distribution) is group communication where information is addressed to a group of destination computers simultaneously. I think the ...
2
votes
2answers
25 views

bitcoind and bitcoin-cli 'unrecognized', how can I access them from command line?

I have downloaded and installed the precompiled Bitcoin Core OS-X (also successfully synchronized). Every tutorial I have seen then directs one to begin using the executables bitcoind and ...
0
votes
1answer
5 views

How can I get the Fee involved in a Bitcoin transaction using RPC client (bitcoin-cli)?

I performed a bitcoin payment in the testnet, here is what I get when I execute bitcoin-cli gettransaction "11b8d5f89793e83e9e10b7ee51fa1b3445f6029f7d7efe4c82b3b261ec513a0e", as you can see the info ...
1
vote
1answer
19 views
0
votes
0answers
26 views

Writing a GPU Bitcoin mining client (learning purposes)

I want to write a basic GPU miner from scratch for learning purposes. By "from scratch" I don't mean that I am unwilling to use libraries but I want it to be similar to real GPU mining software, and ...
1
vote
1answer
17 views

Escrow Services

Can anyone recommend an honest/reliable escrow service? With the ones I found searching the internet is that few of them are publishing their physical location so it's difficult to verify they ...
0
votes
0answers
10 views

Armory Bitcoin Wallet Code and GUI application

I installed the Armory application a few days ago, i downloaded the zipped file from the Armory site and install it on my Linux OS, today I found out that I can actually build from code. So I built it ...
2
votes
1answer
59 views

Are Bitcoins contained associated with a wallet or with an address in a wallet?

What I want to know is, if I have a wallet with several addresses containing 10 BTC (let's say 1 BTC per address) in total and I want to send 5 BTC to a person, but first generating a new address (as ...
1
vote
1answer
30 views

Scripts! But not really?

What is the purpose of a stackmachine if only some standard script forms are allowed? And why are some valid scripts not relayed; what's the point of that? The more I read about script the less it ...
0
votes
3answers
44 views

How do I determine the value of new altcoins?

So, I'm curious about the value of altcoins. Let's say I were to create an altcoin, and get some people to use it... how would I calculate the value of the coin? Is this determined by exchanges? Or ...
1
vote
1answer
24 views

Continuous integration setup using bitcoind regtest on travis-ci

Subtitle: travis-ci fails to run generate JSON-RPC method on regtest I'm trying to setup CI process on https://travis-ci.org platform to install bitcoind and start new blockchain using regtest mode. ...
2
votes
0answers
12 views

Transaction ordering when one transaction redeems another within a block [duplicate]

Say we have txA and txB, and txB contains an input that redeems an output from txA. In order for a block containing both txA and txB to be valid, is it necessary that txB be after txA in the list of ...
0
votes
0answers
16 views

My miner doesnt show up on network but running?

I have an S3+ and yesterday it stopped showing up on my IP scan and connecting to my pool. It still runs the fan (very low speed though) and shows the lights for a network connection, so does my ...
1
vote
1answer
26 views

Can Bitcoin Days Destroyed be a better resolution mechanism for competing blocks?

I've been looking at selfish mining and empty blocks. In all cases, the selfish miner profits by keeping block solutions private until their value to his own pool is maximized, rather than releasing ...
3
votes
1answer
36 views

Is there an API that supports different Bitcoin wallets?

Is there an API that has sending and receiving functionality of different Bitcoin wallets such as Coinbase, Bitcoin wallet, etc... Or would I have to manually incorporate each wallet API myself?
1
vote
1answer
55 views

How to start programming using Ethereum?

I'd like to listen opinions of people that have created already their own working contract. What have you read at the beginning and then? What was the most powerful source that helped you understand ...
2
votes
1answer
37 views

Extortion attempt

If an extortion attempt is made telling the victim to deposit a specific amount to a bitcoin account "or else" what law enforcement agency takes lead? How can one determine the jurisdiction of an ...
3
votes
1answer
33 views

What are version bits?

What does Pieter Wuille's version bits proposal change? How does a miner signal support for a particular fork? Can the version bits system be used with hard forks?
2
votes
1answer
26 views

Does the block size issue also apply to Dogecoin?

Looking at https://bitinfocharts.com/ I see that Dogecoin has only 13% of the number of transactions per day that Bitcoin has (12,778 vs 94,166). I understand that makes block sizes less of an issue ...
1
vote
1answer
19 views

Always rejected shares (Antminer U3 / Minera /CGminer)

hope someone can help. I use an Antminer U3 on a Raspberry Pi with Minera and CGminer. When I mine everything with Scrypt-Algo, I get 100% rejected shares. My current pool is ghash.io. My log looks ...
-2
votes
0answers
32 views

There is something which to help bitcoin? [on hold]

exist anything idea that we help bitcoin ? example i think must will create many services which will be legal and won't ponzi or scam . you can tell me legal idea that will be fine for people and ...
2
votes
1answer
35 views

Bitcoin Core V 0.10.0: Is there a way to force send when not synchronized?

My Bitcoin Core is not yet synchronized, but I already attempted sending a transaction, so now it is 'conflicted'. I can see this conflicted transaction is not being propagated. Is there a way to ...
2
votes
1answer
34 views

Why it is not possible for a payee to verify double-spends of the coin?

I'm reading Bitcoin paper of Satoshi Nakamoto (https://bitcoin.org/bitcoin.pdf). It says: Each owner transfers the coin to the next by digitally signing a hash of the previous transaction and ...
3
votes
1answer
49 views

Why does wallet.dat differ after running?

What information is exactly saved inside the wallet.dat file? When I run the bitcoin daemon, then stop, then compare the new wallet.dat file with the old one, the binary files differ, although I ...
1
vote
1answer
28 views

Checkout time for consumers in stores accepting bitcoins

If the general practice is use to different bitcoin address for every new transaction, does it mean that merchant in a retail store that accepts bitcoins has to change his QR code for every new ...
1
vote
1answer
27 views

Constructing, signing, and pushing a Bitcoin transaction by using pybitcointools with Python

I'm utilizing the pybitcointools module in python 3.4 I've went through time and time again in the examples listed on the github page, but it isn't documented very well nor is the code. My situation ...
2
votes
0answers
27 views

Can I upgrade the software on Cointerra TerraMiner IV?

I got in to bitcoin mining about a year ago by purchasing a used Cointerra TerraMiner IV. The price of bitcoin was higher than the electricity cost to run the machine. I don't know a lot about the ...
1
vote
2answers
67 views

Fastest filesystem for blockchain?

I am running Linux with a harddisk. Currently the blockchain is on an NTFS partition, which probably isn't the fastest. Which filesystem should I choose? As I understand it, a Bitcoin node will only ...
2
votes
2answers
204 views

Does Ethereum support the features necessary to create the Lightning Network?

The Lightning Network of micropayment channels is a concept first conceived by Joseph Poon and Thaddeus Dryja. It requires a few features of bitcoin that are not available yet. ...
2
votes
1answer
30 views

Is there a way to find how many nodes are there?

As a single bitcoind node I can only detect how many connected peers I have. Is there a way to have a vision of the whole bitcoin network?
-1
votes
1answer
31 views

Why is my miner offline in Slush's Pool?

I just looked up how to mine bitcoin with my tablet and im using 2 apps: ARM Miner and Crypto miner, but my worker is considered offline when they are mining. Im getting KH so is that good? And should ...
0
votes
1answer
17 views

Multi-Sig bitcoin in testnet

I am trying out bitcoin multi-sig in test net and when I make a payment i get the payment details address as 3CRrDxJwwkrJqmgSWikQMmZWCDo5SmL3tc but when i go into my test net wallet and try to send ...
4
votes
1answer
52 views

Why does Bitcoin use the input/output system?

Why don't we just use balances? The nodes would verify that balance > 0 before validating the transaction.
-1
votes
1answer
37 views

I sent bitcoins to my wallet before it was synced. Is there anyway to transfer the funds to a different wallet without waiting fo it to properly sync? [duplicate]

I sent bitcoins to my wallet before it was synced. Is there anyway to transfer the funds to a different wallet without waiting for it to properly sync? The wallet still says no available funds or ...
1
vote
1answer
47 views

Could increasing Block size solve the “End of mining” issue

Disclaimer: I am new to this forum and Bitcoin/cryptocurrency in general. After all 21 million bitcoins are released into circulation, it seems that the incentive to mine is gone unless transaction ...
1
vote
1answer
39 views

Solo Cluster Mining

My company has a ~270 node cluster we're thinking of turning into a solo mining operation during downtime. Can anyone direct me to a comprehensive tutorial on how to set this up?
1
vote
1answer
20 views

How to spend bitcoins From Account and specify Fee

I am writing an application that uses bitcoin wallet accounts to specify what addresses belong to what user. I have been reading the documentation trying to find a way to spend Bitcoins specifying the ...
1
vote
1answer
38 views

I am new and I did not get bitcoins [duplicate]

I am new to Bitcoin. So, I downloaded the Windows Bitcoins software from the official website and used the "request bitcoins" option to request bitcoins from my exchanger. My exchanger charged me $20 ...
1
vote
1answer
39 views

Ethereum - how is the output of a contract computation verified?

This may be as simple as a pointer to some place in the docs I've missed, but how/where is the output of a contract's computation checked, or assured against a malicious miner with an intentionally ...
1
vote
1answer
34 views

Where can I see the “official” texts of BIP 100 and 102?

I only see BIP 101 officially at https://github.com/bitcoin/bips/blob/master/bip-0101.mediawiki. Is there a reason that 100 and 102 don't show up here as well? Couldn't they all just be listed as ...
1
vote
1answer
28 views

Receive money in regtest mode

I am working on a app in which my project communicates with the bitcoin server to get the details of a transaction with transaction id as the parameter. I have bitcoind, bitcoin-cli and bitcoin-qt ...
3
votes
1answer
128 views

What will happen to my bitcoin if both Core and XT remain indefinitely?

I have some bitcoin in wallets and online accounts in multiple places. What will happen to this bitcoin if both Core and XT remain indefinitely? Will I own twice as much bitcoin, just in two different ...
1
vote
2answers
34 views

Does Bitcoin mining benefit at all from having more video memory?

Example: I am mining on a Windows computer with guiminer on an onboard gpu. Will assigning more memory to the IGP improve its performance while mining?
1
vote
2answers
32 views

Why are r and s modulo N? (not P)

As Peter Wuille mentions here, the ECDSA signature values (r, s) are modulo N (eg verifying ECDSA signatures, where u1 = z * w % N), whereas the rest of the ECDSA functionality in Bitcoin seems to be ...
1
vote
1answer
21 views

Is Electrum's label sync a decentralized service?

I have some questions about the electrum tool plugin "label sync". How does it work? I had a look into in the QA's here how electrum server/client do work, the random server setup sounds quite ...
3
votes
2answers
197 views

What is the impact of Bitcoin XT fork on current Bitcoin holders?

I was reading that there was disagreement on the block size limit and Bitcoin has been forked to Bitcoin XT? With two different flavors of the software running, which might result in two different ...
1
vote
1answer
24 views

How can one create a Genesis Block for a new Proof of Stake Cryptocurrency?

I've been trying to fork the cryptocurrency Clams for about a week now. All of my code is correct to the coin's specifications, but I've been stuck on the creation of the blockchain. The developers ...

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