3
votes
0answers
16 views

Procedure for calculating taint?

I'd like to understand taint analysis quantitatively. Blockchain.info offers a service that will calculate taint, but I've found no good explanation for how taint is calculated. The best (and only) ...
0
votes
2answers
23 views

Naming Convention In Bitcoin Source Code

Is there specific reference for naming conventions in Bitcoin Core source code? I see regularity in class naming with prefix "C" (Chain, CInv etc.) or pointer naming with "p" (pprev, pnode etc. ) and ...
0
votes
1answer
20 views

Are there any blockchain inspection tools/libraries?

I am going to write software that gets information from the blockchain directly. Are there any tools or libraries to speed up that process? I am looking for things like decoding and encoding ...
1
vote
0answers
14 views

How to add blockchain.info API key to pibitcointools

I have a query-intensive app I'm building that keeps timing out with the message: Traceback (most recent call last): File "test.py", line 72, in <module> array = bitcoin.multiaccess ...
4
votes
0answers
20 views

Bitcoin privacy metrics?

I'm looking for a numerical privacy scoring system that estimate the degree of linkage between the members of a key pool (or even just individual key pairs). Ideally, the method should be easy to ...
2
votes
1answer
49 views

Can I have multiple OP_RETURN outputs in one transaction?

I am wondering if I can inject multiple OP_RETURN outputs in one transaction?
2
votes
1answer
27 views

Why bigger blocks will bring bigger memory usage for miners?

I see the different proposals for the block size and I keep wondering why bigger blocks means a bigger chain ? If the block limit size will rise to twenty-megabyte, it is just a limit, to fill it it ...
0
votes
1answer
11 views

Bitcoins send out after syncing wallet [duplicate]

Good day, can someone maybe help me. I just opened my wallet today after I exported it to a private key and incrypted it (Multibit wallet) and more than half of my coins has been send out to an ...
0
votes
0answers
21 views

Building bitcoind from modified “selfish” code - possible?

For a long time I've been trying to find out ways for running a "selfish mine" algorithm on bitcoind's regtest mode. Now I'm wondering if my plan is feasible, at all!? So I'll just outline my ...
0
votes
1answer
15 views

Rise difficulty in code, still no changes after rebuild

I'm playing around with the code and tried to adjust difficulty by changing code from bnProofOfWorkLimit = ~uint256(0) >> 1 to bnProofOfWorkLimit = ~uint256(0) >> 20 inside code block ...
4
votes
2answers
163 views

How do I uniquely identify a transaction (to protect against malleability)?

Transactions I broadcast can be malleated by anyone watching the mempool (more info here). This rules out using txid for transaction identification. How can I identify my transactions to make sure ...
0
votes
1answer
18 views

Using bitcore to create a transaction with two addresses and change address

I'm playing around with bitcore transactions and multi-sig transactions and was wondering how to send a transaction to more than one address, and keep the change. Currently when I try to send the ...
0
votes
1answer
16 views

Can anyone shed any light on this error? Bitcore Multisig - bad-txns-in-belowout

Code: var utxo = new bitcore.Transaction.UnspentOutput({ "txid" : "e0c6b736e86e8dccd63bbc27f35142b413bd991a410ef50f14cd56fa1a783a1e", "vout" : 0, "address" : ...
0
votes
1answer
16 views

Raw Block data in Hexadecimals

Is there any Web API available for us to query Blockchain data in hex format? The format should follow the standard (https://en.bitcoin.it/wiki/Block#Block_structure) structure rather than JSON.
1
vote
1answer
24 views

Do all implementation of Deterministic RFC6979-compliant ECDSA signatures generate the same signed transaction given the same data?

So if I were to create the same transaction using bitcoinjs and bitcoinj, the end result of the signed transaction would be the same with both libraries, is that correct?
2
votes
1answer
38 views

bitcoin two identical R

Blockchain transaction id 30440220d47ce4c025c35ec440bc81d99834a624875161a26bf56ef7fdc0f5d52f843ad1022044e1ff2dfd8102cf7a47c21d5c9fd5701610d04953c6836596b4fe9dd2f53e3e01 ...
0
votes
1answer
25 views

How To Buy Bitcoins Within Wallet?

I recently downloaded the Armory Wallet for my Mac. It appears to work great, but is there any way I can purchase Bitcoins via an exchange on the wallet interface itself? If not, what should I do?
0
votes
1answer
11 views

Having problem implementing Electrum's BIP32 Key deriviation path

I'm trying to create a BIP32 storefront that uses Electrum's key derivation path. The user passes me their MPK, and with every order I generate a new address based on the MPK. I'm able to generate ...
0
votes
0answers
11 views

Is this pattern a tracking method or just a Bitcoin wallet making change to itself?

While following a particular transaction from a donation received in 2011 I noticed a pattern in the block chain. The entity donating would send .001 to an address and the remainder of the wallet ...
1
vote
2answers
35 views

What can a dishonest node do (or try to do)?

Except this kind of attacks: https://en.bitcoin.it/wiki/Double-spending For example can he simply create a new block that includes some invented transactions that steal money from real address? ...
-2
votes
0answers
14 views

my bitcoins did not transfered to a hidden wallet

it appears that it was send but i never received them in the hidden wallet, is there a miss step i did not do? o how do i get them back? what i did was i took a picture of the QR code then i send the ...
1
vote
1answer
64 views

Was this message written by Satoshi?

the program i am writing to parse the bitcoin blockchain got stuck on block 251718. i hadn't yet implemented support for some of the opcodes in the txout script for tx 24 and i'm now in the process of ...
2
votes
1answer
218 views

Why are there so many confirmations?

A friend sent me Bitcoin to my blockchain wallet. It shows the amount as part of my balance. However, it says there are 108 confirmations and the number of confirmations keeps going up. Why is this ...
0
votes
1answer
15 views

Getting error when starting bitcoind in regtest mode

I tried starting bitcoind in regtest mode but got the following error. Command : bitcoind -regtest -daemon Output : Bitcoin server starting Error: Invalid amount for -paytxfee=: ...
0
votes
1answer
13 views

How does difficulty get rebalanced in Digitalcoin's Multialgorithm mining?

It appears that Digitalcoin has switched to mining with the three algorithms Scrypt, SHA256, and X11. I assume this means that the network will accept a block mined with either of the three ...
1
vote
0answers
28 views

Is Quark as secure as SHA 256?

I'm trying to make certain I'm understanding the purpose behind the Quark algorithm. There are lots of devices that need secure algorithms but have severe power and processing constraints such as ...
0
votes
2answers
59 views

Bought a bitcoin, sender said it was sent, not showing in blockchain or wallet. Where is it?

So I bought a full btc off of localbitcoin with amazon giftcard code. I sent the code and clicked that payment was completed. It's been about 2 hours. About 1 hour since he said that he sent the ...
0
votes
1answer
7 views

AntMiner S5 chain #2 intermittently operational

Why is my AntMiner S5 chain only intermittently operational? What could cause this, how could I diagnose it, and what is the solution? Will BitmainTech replace it for me? How do I know if it's under ...
2
votes
2answers
12 views

Bitcoin Wiki mirror?

Are there mirrors of the Bitcoin Wiki? (https://en.bitcoin.it/ is down.)
0
votes
1answer
13 views

Problems generating addresses using bip32

I'm trying to generate bip32 addresses using the following (the PHP version). https://github.com/prusnak/addrgen The author provides a test MPK which I can get working that looks like this: ...
1
vote
1answer
31 views

Why the same confirmed transaction in the Testnet has different block hash and other fields?

Chain.com http://explorer.chain.com/transactions/a4bfb8e21ae3d6232183dfb8ef5fcee8c9b8f223c2d25738e24765a75abd009b Chain.so ...
0
votes
2answers
27 views

Solo mining error

so i have been trying to set up my pc to solo mine for almost a week now. i am using bitcoin core and guiminer v0.10.2. i have gotten to the point where i can start mining, but when i do i get this ...
0
votes
1answer
15 views

Is it possible/feasible to send out large amounts of small transactions without paying fees?

How long would it take to process 1000 transactions from the same wallet, with outputs ranging from 100 bits to 1000 bits and no transaction fees for any of them? How about if 1000 of these ...
2
votes
2answers
41 views

How to make genesis block transaction spendable?

I read this question Why can’t the genesis block coinbase be spent? . It says because of some quirk (the genesis block coinbase transaction is not added to the global transaction database) genesis ...
0
votes
0answers
11 views

Dogecoin qt build compiling error libdb_cxx headers missing

When I run MSYS shell: ./autogen.sh BOOST_ROOT=../boost_1_55_0 ./configure --disable-tests i got the error error libdb_cxx headers missing
3
votes
2answers
185 views

What is a mBTC?

I have been trying to find out just what is an mBTC is. Everywhere I look I cannot find out what the value is compared to a Bitcoin. I was hoping you could advise me of what the value is.
-1
votes
1answer
38 views

Bitcoind crashes directly after starting

I'm am trying to solo mine. My first problem is when I try to launch bitcoin client as server with guiminer I get this error Invalid -rpcallowip subnet specifications.* valid are a single ip. I ...
0
votes
0answers
18 views

Where can I find a list of Gambling sites that accept Bitcoin / Atlcoins and also invest in their bankroll?

I was wondering if there was a site that lists all the gambling sites that accept bitcoin / altcoins and also ones that can invest in their bankroll?
0
votes
1answer
25 views

Exchanges whose websites use EV SSL certs?

What are all the Bitcoin exchanges whose websites have an Extended Validation (EV) SSL cert? EV certs appear green in Firefox. This is what Circle's looks like: The only exchanges that have EV ...
0
votes
1answer
28 views

wallet.dat file compromise

If the private key(s) are/is in the wallet.dat file, then isn't it overly exposed to hackers? Can't a hacker just read my C:[dir]\wallet.dat file and take all the bitcion?
0
votes
0answers
15 views

Stop Bitcoin Block ReIndex

I just recently installed armory an bitcoin-core. They constantly are using 100's of GB's of internet. Its getting annoying, because i cant really use the bitcoin if armory is constantly offline. I ...
1
vote
1answer
26 views

import btc electrum wallet into coinomi

can I import btc electrum wallet into my coinomi mulit-currency wallet app? They both use electrum servers and they both have seeds so it looks like they are a similar kind of wallet. In electrum I ...
3
votes
3answers
22 views

Source code for SPV node on iOS - where to start?

I'm working on a proof-of-concept for a blockchain project and at its core it will need a modified SPV node running on iOS. The reason I need to modify it is so I can build non-standard (e.g. ...
2
votes
1answer
26 views

BIP70 who issues the transactions, wallet or payment_url server?

The BIP70 specs I'm reading confuse me about who broadcasts the underlying transactions to the bitcoin network. My reading seems to suggest that both the user's wallet and the server at the ...
0
votes
1answer
32 views

How to login into my wallet?

I get my bitcoin address from freebitco.in. So how can I login into my wallet to know about my bitcoins? How to convert bitcoins into dollars and send it in to my prepaid debit mastercard?
0
votes
0answers
21 views

Open Source Hardware For Air Gapped Computer?

I'm looking for vetted open source computer hardware that can run Armory air gapped. Anyone know of such vetted hardware sources?
2
votes
1answer
93 views

Who runs the Bitcoin wiki?

Who runs the Bitcoin Wiki? What is their Twitter account? I am looking for the community, group or person who runs this site. Does this being have a Twitter account? The account @bitcoin_wiki ...
4
votes
1answer
30 views

Speeding up confirmation by double-spending a transaction stuck in mempool

In the context of no-fee transactions that can take a long time to get their first confirmation, is it possible to use raw transactions and double-spend the original transaction by broadcasting ...
0
votes
1answer
22 views

Electrum 2 validation: how is the HMAC always 01…?

Electrum version 2 creates a seed from a random number which is then encoded as a mnemonic. The seed is validated by checking that the hmac begins with the bytes 01 or 101 for standard and 2fa types, ...
1
vote
1answer
33 views

What is the value of these bitcoin certifications that have popped up recently?

Are bitcoin related certifications viewed favorably amongst the bitcoin community? I work in a related field and I am interested in pursuing a certification to distinguish myself, but I'm not sure how ...

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