0
votes
0answers
1 view

Armory Client interferes with rpcuser/rpcpassword definitions?

I'm trying to start solo mining with the GUIMiner client. I need to enter my username/password as defined in the bitcoin.conf file. I never entered those, but they did exist because my BC client ...
1
vote
1answer
6 views

Does an OP_RETURN script always need another output within the transaction?

I was reading this: Explanation of what an OP_RETURN transaction looks like and I wondered if the second output "value" : 0.00200000, was at all necessary. Can I just have a OP_RETURN with a 0 output ...
0
votes
1answer
7 views

bitcoin stuck with no confirmations

Hi im quite new to this i have transfered coins to a wallet 4hrs ago and are still stuck with no confirmations i do t have a btc wallet on the block chain info thing lol i transfered from btc market ...
1
vote
1answer
6 views

BIP65: “replacing ntimelock entirely”?

BIP65 discusses replacing the ntimelock field with the new CHECKLOCKTIMEVERIFY OP code: As an aside, note how if the SignatureHash() algorithm could optionally cover part of the scriptSig the ...
0
votes
0answers
15 views

my funds is confirmed but still not available? [on hold]

So I sent a payment to someone and it is showing that it has been confirmed on my app but the person did not get the funds. And it is saying 2 unconfirmed transaction when I already have about 8 ...
1
vote
1answer
64 views

What is SPV mining, and how did it (inadvertently) cause the fork after BIP66 was activated?

I'm curious to hear an in-depth explanation of the hard fork and how it was caused; I've heard/read a great deal but I'm lacking a cohesive explanation.
5
votes
1answer
113 views

When did BIP66 switch from activation to enforcement?

Recently, BIP66 switched from activation (miners enforce rules within block) to enforcement (network enforces rules on all blocks). I'm having trouble figuring out when this happened, or on what ...
2
votes
1answer
26 views

Release A Bitcoin From Multi Sig Address?

I just made a multi sig address from 3 address bitcoin and the result from that is 3Gf18oGoTaNCW38dVKe2ygNpUvUJmg6TY9 and i want to know how i can release the bitcoin ?
1
vote
1answer
7 views

What's the point of the hash160 field in blockchain.info API?

I've been wondering who/what could use the hash160 field of the blockchain.info API. For example, for the address "1N3Xxt13zbDLU66aSBiMB7AjRW1UiUFAau", the hash160 value is ...
0
votes
1answer
26 views

Why were BTC not accepted in the Humble Borderlands Bundle?

AFAIK, so far, BTC has been accepted in every Humble Bundle since they started accepting them… instead they weren't an available option with the Borderlands bundle. Is there an official, ...
0
votes
1answer
21 views

What is stopping someone from creating their own “chain” in Proof-of-Stake systems?

I'm studying how Proof-of-Stake systems work. This answer on "How does proof-of-stake “mining” work?" explains specifically the Nextcoin implementation of PoS. The idea is that the next "miner" is ...
0
votes
1answer
18 views

Can you use non-standard characters for creating a Bitcoin Brain Wallet?

Can you use non-standard characters to create a bitcoin brain wallet? Ex. Chinese characters, ascii characters using the numberpad with ALT key. Is there downsides to this?
0
votes
1answer
14 views

What is the max character limit when creating a Bitcoin Brain Wallet?

I'm thinking of using a brain wallet for btc storage. Yes i know all the talk about it being insecure. But what if I used a bunch of information that only I would know making a >100 character brain ...
1
vote
2answers
41 views

Possible to speed up reindex?

I just reindexed a node that was already synced (in order to enable txindex); it took around 9 hours. It's on a pretty good system: 16G RAM, i7 with 4 physical cores. Storage is a weak point, with ...
2
votes
2answers
44 views

How does an SPV wallet use the headers that it downloads?

My understanding is that an SPV wallet downloads "headers only". These headers are not enough to get a UTXO set, so it has to rely on another data source when it comes time to move bitcoin. If thats ...
0
votes
1answer
16 views

Minerd not showing boo or yay

I ran ./minerd -a sha256d -o stratum+tcp://stratum.f2pool.com:3333 -u (my username).node1. Here is a sample of the output: [2015-07-05 07:15:23] thread 1: 146649416 hashes, 2332 khash/s [2015-07-05 ...
1
vote
0answers
26 views

Buy bitcoins with my regular AMEX (american express card)

I can not find any website or service to buy bitcoins with my AMEX. www.bctquick.com does not work aymore ? (webpage inactive) any advise ?
0
votes
0answers
19 views

php private key to wallet import format (wip)

I have been writing a php file intended to create a bitcoin private key and change it to wallet import format. The issue is when I try a command in a gnome-terminal such as: bitcoin-cli importprivkey ...
0
votes
0answers
10 views

Does the electrum client decide the best chain on the basis of how much work was done, or how long the chain is?

Bitcoin Core compares blockchains based on how much work they contain, and not necessarily which one is longest. This is useful for preventing time warp attacks. This comment on HN says that the ...
3
votes
1answer
17 views

Bitcoin Client crashing while syncing

I am getting this problem today: when syncing, the client suddenly crashes with the following debug.log: ..... 2015-06-29 14:30:34 IO error: ...
0
votes
1answer
34 views

Getting bitcoin globe data

I just saw this bitcoin globe https://blockchain.info/nodes-globe?series=topBlockRelay It has two modes,"Online Now" and "Miners". I wanted to ask if anyone knows what the bars and colors stand for ...
1
vote
0answers
20 views

Cryptocurrency with small block size limit or large block time

So there are a lot of cryptocurrencies that tries to improve on Bitcoin's 1 Mb block size limit and 10 minute block time (6MB per hour) by using faster block times or larger block size limits. For ...
1
vote
2answers
18 views

Where can I access a NXT public testnet node?

Was wondering where can I access a public NXT testnet node?
1
vote
1answer
29 views

Avalon mining issue

Pretty much a newbie to mining and got an Avalon (Nano 3) to start, I'm running Windows 8.1 and using the LPC USB VCom port (COM3). AvalonGUI runs about 5 minutes at 3-4 GH/s - then closes/stops ...
0
votes
0answers
14 views

JSON decode of 1 failed

Trying to mine using cudaminer but I keep getting JSON error 1, here is the batch file cudaminer.exe -H 1 -i 1 -l T9x20 -C 2 or -H 1 -i 1 -l T12x32 -c 1 -o stratum+tcp://global.wemineltc.com:3333 -u ...
1
vote
1answer
74 views

How does the bitcoin network recover in case of a hash collision in the block hash?

A Bitcoin client has to download the whole blockchain from the P2P network in order to become a full node. A full node is able to determine, if a transaction in the network is valid or not. To ...
0
votes
2answers
38 views

Ubuntu. (blockchain of version 0.9.3 compatible with 0.10.1?)

I have version 0.9.3 of bitcoind on my Ubuntu server and I want to upgrade to 0.10.1, I have nothing in my wallet. Does the blockchain 0.9.3 compatible with 0.10.1? Do I have anything to keep from ...
1
vote
1answer
24 views

Compact integer in Scripts

I've been looking at the compact representation of integers for integer operations in the Script language. It seems that most operations produce or push byte arrays, but when integer operations are ...
2
votes
3answers
85 views

Transaction without fee

If i want to make a transaction and sent it without fee how long it will be getting conf ? And my friend told me it will take more than 1 day. Can anyone here explain to me why it can be happen ?
0
votes
1answer
25 views

Total amount of nodes and avarage active peer number

I have 2 questions: Does anyone know where to find a reliable source for finding out a total amount of active bitcoin nodes? How many peers does each active node have in avarage? Is there a limit to ...
1
vote
1answer
18 views

Compiling litecoind on Ubuntu 15.04

I am trying to compile litecoind on Ubuntu 15.04 and I stuck here: /litecoin/src$ make -f makefile.unix USE_UPNP=- make: makefile.unix: No such file or directory make: *** No rule to make target ...
0
votes
1answer
19 views

no IPv6 peers connecting to my node

getnetworkinfo says IPv6 is working on my node: { "name" : "ipv6", "limited" : false, "reachable" : true, "proxy" : "127.0.0.1:9050" } Yet why don't I get any IPv6 peers connecting to my node? ...
0
votes
0answers
9 views

Blockchain API whitelist all IP addresses

I am currently trying to implement the blockchain API in my application. I have done this successfully however, I am having trouble whitelisting IPs. Each time a user accesses the app with a different ...
1
vote
1answer
13 views

Can I ignore the blocks directory for time machine backups on OSX?

After installing Bitcoin-QT I have over 40GB of files in the ~/Library/Application Support/Bitcoin. It seems that the most important file there is wallet.dat. Does it mean that I can exclude from time ...
1
vote
1answer
27 views

Import two wallet.dat into Bitcoin-Qt client

This is very closely related to Import wallet.dat into a new Bitcoin-Qt client, but I feel this is not a duplicate because the (great) answer to that Q is for only restoring one wallet. I used ...
0
votes
0answers
14 views

country official currently if convert in bitcoin [closed]

i living georgia and georgia official currency is GEL and now GEL price very drop down against the dollar . before happened gel price degradation then cost. 1 dollar 1.10 GEL right now aproximately ...
0
votes
1answer
47 views

Why the message is need in verify function

here is the how bitcoin works under the hood article http://www.imponderablethings.com/2013/07/how-bitcoin-works-under-hood.html i did not got this why message is needed when using this verify ...
2
votes
1answer
21 views

RFC6979; (v, r, s), what is v?

Deterministically signing a Tx with RFC6979 returns v, r, s, where r and s are the 2 values used in standard ECDSA signatures. v = 27 + (y % 2), so 27 + the parity of r, as pybitcointools indicates. ...
0
votes
1answer
32 views

Block Chain Library

I was wondering if there are any open source blockchain libs that I could use to build a project with? Thanks
0
votes
0answers
5 views

Bitcoinj Multisignature Address

In multisignature address contract, how to set multisigoutput while sending bitcoin back to the client? I tried this, byte[] bytes = ...
0
votes
0answers
6 views

Secure my wallet with a YubiKey?

Is there a way to secure my Bitcoin Core wallet using a YubiKey? (cf. this, which mentions "using a YubiKey as one of the parties for m-of-n signatures." cf. this thread: "Yubikey and Bitcoin ...
2
votes
2answers
25 views

Is this brainwallet approach safe enough?

Let's suppose I derive a private-public keypair from a passphrase like this : long_and_complex_enough_but_yet_easy_to_remember_passphrase Now I wish to generate 100 more keypairs using same ...
0
votes
1answer
33 views

Transaction still unconfirmed

I sent some money 3 hours ago my BTC client (Bitcoin Core) still says the payment is unconfirmed ?. Any help much appriciated
1
vote
1answer
24 views

What is the function of LOCK(cs_main)?

Does LOCK(cs_main) pause and branach the program in order to do some necessary job before going on? I'm trying to publish blocks reactively (as a selfish miner) upon receipt of inventory message from ...
-2
votes
0answers
50 views

Its been hours and still unconfirmed! [closed]

http://puu.sh/iIjyz/e992fbe540.png What the hell is wrong? I sent almost 600 euros of bitcoins to blockchain and still can't use any of them! Example one of my transactions has 18 confirmations, BUT ...
3
votes
1answer
39 views

All else being equal which is better for the environment, Litecoin or Bitcoin?

Does scrypt mining inherently confer any environmental benefit or energy efficiency for the same level of service provided?
0
votes
0answers
10 views

where can I download the blockchain nightlies handled by tcatm?

I want to download the blockchain nightlies handled by tcatm, yet the site seems down. Is there any alternative site? Thank you
6
votes
2answers
67 views

Can someone outline the full pros/cons of the various Replace-By-Fee proposals?

I've done some research myself, but I find that I'm either biased myself, or my sources themselves are biased. Does anyone have an objective analysis of the various proposals and their ...
1
vote
1answer
16 views

Versions of BTC and TEST

I'm dorking around with creating a TEST transaction using libbitcoin's bx command. Besides setting the inputs and outputs, the bx tx-encode sub-command allows one to specify lock_time and version. ...
0
votes
0answers
22 views

Bitcoin core 64 bit has freezed

I downloaded bitcoin core 64 bit and it was synchronizing. I turn my laptop off and open the program again and now it frozen at " loading block index " . I have bitcoins on it. What should I do now ?

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