All Questions

0
votes
0answers
5 views

PrimeTime Intraday Volatility Extrapolation

I found this indicator on mql5.com called PrimeTime Intraday Volatility Extrapolator. I would like to apply this idea to Bitcoin. How do you think it has been done? (without hacking it) Do you think ...
0
votes
1answer
15 views

BIP38 on multisig? Does it work?

I was making a multisig account with 3 of my Bitcoin addresses. The multisig account needs 2 of 3 private key to spend the Bitcoins in there. Then, I came up with an idea that nobody on the internet ...
0
votes
0answers
4 views

Ubuntu 14 LTS with SX tools installation issues

I'm trying to install the SX (http://SX.dyne.org) tools using Ubuntu 14 LTS following the installation instructions (http://sx.dyne.org/introduction.html#installation). I use wget to download the ...
2
votes
1answer
12 views

Difference between Outpoint structure returned from Blockchain.info and what is in the Protocol Specification

if you follow this link, you will see a specific bitcoin address. If you look closely at the prev_out field, it is not an outpoint structure. Inside of the protocol specification under transactions, ...
1
vote
2answers
36 views

Altering a block after generating it

Once a miner has found a block, how easy it is for him to add or remove a tx included in that very block? Would he have to solve the modified block from the scratch or is there a point he can resume ...
0
votes
0answers
17 views

How can I mine ALT SHA-256 coins using a Bitmain S4?

The bitmain S4 does 2TH/s out of the box with no overclocking. For many alt SHA-256 coins, this can be 10% - 50% of the entire network hashing power, which would allow us to gain alt coins quickly, ...
1
vote
1answer
24 views

avoid rounding errors in javascript with bigdecimal?

a user submits a buy request: 0.0104 BTC at a rate of 345.92 EUR config: var mode = RoundingMode.HALF_EVEN(); var satoshi = new BigDecimal("100000000"); user input: var btc_b = new ...
0
votes
0answers
30 views

Can I double encrypt my multisig wallet?

I was doing some research about how transactions work. I found that if I learned what multisignature transactions are, I would learn how a transaction works (rawtransaction, sign, verify...). I ...
0
votes
2answers
17 views

Block Chain API for BTC transactions

I want to fetch transactions for an address from the following api: https://blockchain.info/address/$btc_address?format=json The thing is understanding the json returned from the api, I don't ...
1
vote
1answer
35 views

How to verify ECDSA of a sample litecoin tx using pycoin?

I'm using the litecoin testnet network for testing. I have a UTXO at 053baee857adfdc16959e9dbc9618e0e935f0a1e51e226e651fcd67242f1f462 with a vout of 0. I make a raw transaction sending the coins to ...
4
votes
2answers
67 views

Why is Python popular in Bitcoin projects?

When checking out open source projects related to Bitcoin, I see that many are written in, or make a large use of, Python language. I mostly use Ruby and have little experience in Python; so, I would ...
3
votes
1answer
40 views

What are 'pegged' side chains are and how they will be useful for Bitcoin?

What seems to be a very important paper was released this past week (http://www.blockstream.com/sidechains.pdf). It centers around the idea of 'pegged' side chains, and being able to move coins from ...
2
votes
1answer
29 views

Can side chains or “pegged” chains negatively affect the security of Bitcoin?

Regarding the concept of side chains or "pegged" chains which has been discussed since as early as 2011 and explored in this white paper, how can these negatively affect the security of Bitcoin? ...
0
votes
2answers
41 views

Is there any software that allows me to make a single multi-recipient transaction?

I would like to do a payment to multiple addresses in the same transaction on a regular basis. The scenario is this: Collect addresses via QR or string (these may change on each occasion) Use all ...
1
vote
1answer
38 views

C++ code for traverse though all the blocks in blockchain?

In my project for one particular functionality, I want to traverse through all the Transactions. For that purpose I want to traverse through all the blocks in blockchain.
1
vote
1answer
17 views

In BitcoinJ, what is the purpose of Peer?

In BitcoinJ, there is PeerGroup and Peer. I understand there are differences such as one is related to a group of peers while other is related to a single peer. When should I use which construct? ...
2
votes
1answer
33 views

Bitcoind transaction data verification

I find myself a victim of either my poor googling skills, or the lack of detail in the bitcoind docs. I have a walletNotify script running on a full node that whenever a transaction to / from my ...
3
votes
1answer
22 views

How to generate a public key from a private key using Elliptic Curve Digital Signature Algorithm

I'm trying to understand the graphical basis that underlies the discreet logarithmic Elliptic Curve Digital Signature Algorithm (ECDSA) introduced in Chapter 4 of "Mastering Bitcoin" by Andreas ...
0
votes
0answers
12 views

Darkcoin centralisation?

Darkcoin is supposedly completely anonymous. How does this work without any centralisation? Is there one person with all the transactions and only they mine?
1
vote
0answers
16 views

Bitcoin Escrow API [on hold]

I have an e-commerce website. In my website there are two types of registered users: Seller (They place an advertisement to sell there product [example:house]) Buyer (Want to buy house of seller ...
1
vote
0answers
8 views

Generate Bitcoin addresses using a Master Key from Armory wallet

Is it possible to generate Bitcoin addresses using a Master Key from a Armory wallet with PHP? I don't want to use Electrum Master Key as Armory has a lot more features that come in handy often.
-1
votes
0answers
24 views

Primary lesson about usage and working of bitcoins [on hold]

I was totally unaware about bitcoin.One month back I was surfing on internet and came through a bitcoin site.In that site there were instructions to create bitcoin address to earn bitcoins.I followed ...
-4
votes
0answers
44 views

Mine BTC = VIRUS [on hold]

Hello I have set up a very nice bitcoin mine place. With all the component and wallet, pool and so on. But the software was also important so I downloaded cgmine. It turned out that it was a virus ...
0
votes
0answers
16 views

How do i transfer bitcoins from bitcoin qt to multi bit?

Im very new to this so forgive me. I downloaded bitcoin qt and after 16 hours there was no progress whatsoever with this 'blockchain' stuff. I bought some bitcoins to send to the bitcoin qt client. ...
0
votes
1answer
27 views

bitcoin-cli getbalance different from listunspent

I have probably misunderstood the meaning of bitcoind 'getbalance' command. I am using bitcoind in regtest mode. I am using imported multisig bitcoin watch-only addresses, which are the following: ...
0
votes
1answer
18 views

Decode blocks received and Store in another file for analyzing

I am working on a bitcoin research project. I want to decode receiving blocks from the block chain and store decoded data in a separate file for analyzing purposes. For this purpose I digs the ...
0
votes
1answer
14 views

Why is the scriptPubKey required when using signrawtransaction?

The signrawtransaction rpc method calls for the following use: signrawtransaction "hexstring" ( [{"txid":"id","vout":n,"scriptPubKey":"hex","redeemScript":"hex"},...] ["privatekey1",...] sighashtype ...
3
votes
1answer
36 views

Can there be more than one result of decoding a raw transaction?

I was looking in rpcrawtransaction.cpp and came across the signrawtransaction rpc method. While reading through this method, I thought these lines seemed strange: vector<CTransaction> ...
0
votes
0answers
25 views

How does the core client decide which UTXOs to spend?

If a core client has several UTXOs to spend when it is prompted to make a transaction, what logic does it follow to choose which UTXOs it spends? Is it oldest/newest first? Maybe prioritized by ...
1
vote
1answer
20 views

JSON RPC calls for Armory wallet

I'm trying to access an armory wallet via RPCs. For instance using the procedure listreceivedbyaddress should ideally return all of the addresses in my Armory wallet. However, when I run this from my ...
0
votes
1answer
30 views

Will 64-bit miners work on 32-bit machines?

I want to distribute some miners, but I prefer not to distribute 2 versions of everything (32-bit and 64-bit). According to Microsoft, most 32-bit programs run on 64-bit systems. I'm not concerned ...
1
vote
1answer
24 views

BIP38 or Brain wallet?

I have seen many videos about paper wallets and different ways to store BTC. And I have choose to store using a cold wallet (paper wallet). But I am not sure what option I should choose: a normal ...
1
vote
1answer
16 views

Bitcoin RPC getbalance of address I sent coins to on regtest

Here is my terminal session: $ echo $address mvt7M16caMH1xoJyfWU5orjArfq97jhZ7k $ bitcoin-cli -regtest getbalance 5899.99990000 $ bitcoin-cli -regtest sendtoaddress $address 10.0 ...
3
votes
1answer
117 views

What is the alt stack?

I noticed in the bitcoin wiki script page (https://en.bitcoin.it/wiki/Script) that there were two opcodes named: OP_TOALTSTACK OP_FROMALTSTACK It looks like there is another stack that can be used ...
1
vote
1answer
91 views

Bitcoin Script Execution - Must end with just `true`?

When executing bitcoin validation scripts, does the final stack have to end with just true on the stack, or can there be some elements under the true? In other words, are both of these final stack ...
1
vote
1answer
24 views

What is the easiest way to associate an utxo to a specific account?

I'm building a web application that uses bitcoind's accounts to track user balances. My dev env is currently in regtest mode. I am working on calculating the network transaction fee prior to creating ...
4
votes
1answer
46 views

Self-hosted Bitcoin wallet for Linux with API?

I'm looking for some Bitcoin wallet software I can host locally on my Linux server that provides either an API or webhooks for detecting when Bitcoin transactions have completed. I also need a way to ...
1
vote
2answers
28 views

Do testnet networks require the same main network fee?

As in the title, I'm wondering if testnet networks always require the same fee. I know the coins aren't worth any thing, so it doesn't matter if I have to pay the fee or not, but I'm just curious.
0
votes
1answer
25 views

Bitminter - no rewards when more work was done?

Very new to this concept, why would something like this occur on Bitminter's pool? Completed Duration Difficulty Pay/Hour at 1 TH/s Total Thps Your Ghps Your work 2014-10-25 15:02 1h 46m ...
0
votes
0answers
34 views

explanation of crypto currency mining [on hold]

I'm looking for a detailed explanation of the process of mining crypto currencies, specifically scrypt based currencies. I am already aware of the basics (and how to mine, which is not the subject of ...
1
vote
0answers
19 views

Where can I get a list of all the 72 initial NXT stakeholder addresses to see distribution?

Where can I find a list of all the nxt accounts that were the initial 72 seeders? I want to find out to see how many of these accounts have moved their funds and dispersed it to the public.
2
votes
1answer
20 views

Is there a correct way to refer to “orphan” blocks?

I was reading a passage on the bitcoin wiki that pointed out that it doesn't make sense to call invalid chains "orphans," since, by definition, every block in the blockchain except the genesis block ...
2
votes
1answer
17 views

What does the main_chain value returned by blockchain.info mean?

What does it mean that for bitcoin block to be on the Main Chain? What other chains are there? Is this as opposed to testnet? This is regarding the main_chain value in the blockchain.info api here: ...
1
vote
0answers
19 views

Sending Bitcoins with Armory doesn't work

I have a few Bitcoins that I manage with Armory. It shows the correct amount of money in my wallet under the correct address. I now want to send the Bitcoins to somebody else. When I open my wallet ...
2
votes
1answer
34 views

How is the distributed transaction log stored in P2P network?

After mining, a block is validated and broadcasted by the miner. Then, where does this newly mined block get stored at? Where does my Bitcoin client pull the transaction data from?
2
votes
1answer
26 views

How to exploit the possibilites of blockchain for proof of authorship?

I want to to create some kind of Proof-of-Authorship mechanism, that's something that many artists had asked before: How can I prove authorship of my work To accomplish my objective I need to deal ...
0
votes
0answers
9 views

What is the difference between a hard fork and a soft fork? [duplicate]

A fork is a splitting of the blockchain. But what is the difference between a hard fork and a soft fork?
1
vote
1answer
42 views

Preventing the exposure of public addresses on a website

Rather than having a single, fixed address, I want to generate a new address on my website every time a user request comes in. I'm concerned about google or another web crawler indexing my website ...
0
votes
2answers
43 views

Unconfirmed transaction - Non(e) standard input

A few hours ago, I created an offline transaction using the offline transaction tool available at: https://www.strongcoin.com/downloads/offlineTransaction.zip I coped and pasted the resulting ...
1
vote
2answers
34 views

API Authentication via Python

I'm having trouble following LakeBTC's API instructions for connecting to their API via Python. API Documentation: https://www.lakebtc.com/s/api I have my key (email address) and secret. I'm using ...

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