Bitcoin Core is an MIT-licenced Qt 4 GUI application for the original Bitcoin codebase. Additional/previous names include "Bitcoin-Qt", "Satoshi-Client", and "Standard Client".

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2
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1answer
32 views

Is it possible to have my blockchain on a different folder than that of my wallet files?

I am trying to implement bitcoin payments for the project I'm currently working on, and I need to create a bitcoin wallet that should be inside a USB stick. This USB stick should be at the hands of ...
0
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0answers
15 views

listtransactions returning duplicate transactions with category “Send” & “Received” both

I am facing serious problem in listtransactions call. I am getting duplicate transactions with "send" and "Received" category. For I have sent some bitcoins from 31zeoskE8zeyQARFEVzwJzsp7GQpLn5zhF to ...
0
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1answer
15 views

Is it possible to execute a CLTV transaction in bitoin core 0.11 console?

The title says it all. How can one perform a op_checklocktimeverify transaction using bitcoin core? I've searched around and I've found a few repo's on github but nothing about how to do it in the ...
0
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0answers
17 views

Bitcoin soft fork hypothetical issue based off BIP66

Recently I saw BIP66 activation occur on testnet, but then the majority of miners were propogating V2 blocks again, causing 0.10 nodes to reject any v2 blocks - causing a fork between V2 and V3 nodes. ...
6
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1answer
85 views

What level of mathematical understanding do I need in order to contribute or to understand the crypto behind bitcoin?

My mathematical knowledge is up to CALC II (college level.) Is this enough mathematical maturity in order to understand the crypto in bitcoin or do I need more knowledge? If I do indeed need more ...
6
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2answers
93 views

Estate planning: how can I ensure my bitcoins are inheritable?

What are good ways to ensure my bitcoins can be inherited by my family when I die or become permanently incapacitated? I think there are probably two significantly different situations to account ...
0
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1answer
28 views

from Bitcoin Core to SPV client

I have a wallet on Bitcoin Core with addresses that are receiving and will receive payments in the future (which I can't change); for this reason I cannot send my bitcoins to a new wallet; that said, ...
0
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1answer
42 views

Can old wallet.dat (offline long time) still receive money?

I have an old wallet.dat file (from a backup) and no client installed since a very long time. Recently some transactions have been made (BTC have been sent to my address). Will this old wallet.dat ...
2
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1answer
53 views

Is there a difference between “In” and “Out” peer connections?

On bitcoin-qt, some peers are called "Out" and some are "In". Is there any difference besides who initiated the connection?
0
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1answer
49 views

Transaction never confirmed over 2 days [duplicate]

I did a transaction from my bitcoin core wallet. The transaction 6263452f635713e60f83d45fe41b1c9ba3b5f5e3af664778bf18a05b15cfde06 has not confirmed, and it is now over 48 hours since I made the ...
0
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2answers
50 views

Broadcasting an OP_RETURN transaction

I am facing two problems below, First is that I am trying to broadcast transaction which have OP_RETURN but blockchain.info continuously rejecting it, though I have broadcast it using bitcoind. ...
3
votes
3answers
126 views

Why does bitcoin core need to download the blockchain

I understand that the blockchain is what keeps track of who has what coins and makes sure that everything is correct and secure, but why do I have to download it? Isn't that where the miners come in? ...
0
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1answer
25 views

How can I regain coins on a device with insufficient memory to fully synchronize?

I have started syncing the blocks and didn't know how much room was need, I am about 40 gb through and my device is full. I already have money on the account, but it isn't synced far enough to send ...
0
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0answers
35 views

Send and Receive Bitcoin - development

How to develop send and receive bitcoin using coinbase api, i need to use in java. i tried the sample from https://github.com/coinbase/coinbase-java by using readme.md instruction. but facing issue. ...
0
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0answers
15 views

bitcoin-qt restored wallet.dat all synced closes after correct passphrase “assertion error crypt” HELP

Installed bitcoin-qt and replaced new wallet.dat with old wallet.dat backup Opened bitcoin-qt and let it sync and all blocks synced and wallet has correct funds and past transactions. I Want to ...
1
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0answers
24 views

How does Bitcoin Core sort memory pool transactions by fee?

I'm trying to understand the algorithm Bitcoin Core uses to sort memory pool transactions by fee. Gavin's fee rework proposal states: Next, sort all remaining memory pool transactions by ...
4
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1answer
30 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
2answers
47 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
27 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 ...
1
vote
1answer
47 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
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0answers
26 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 ?
1
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0answers
23 views

Meta-Mining: Can mining exist in abstract states?

Has anyone here explored or pondered possibilities for meta-mining? Theoretically, you could have miners work on any computational problem, and then have rewards handed out proportionally as part of ...
1
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0answers
24 views

Bitcoind writes complete wallet.dat regularly which is a problem, what can i do?

i have troubles with my system, using iotop i identified bitcoind as the source of problems. I am running bitcoind of bitcoin-0.10.0-linux32 and am using the RPC calls of bitcoind. My wallet file is ...
0
votes
1answer
49 views

my bitcoin core software isn't opening.

I downloaded bitcoin core (64 bit) and I am still waiting for it to synchronized. But just now, If I open the software it loads from 1% to 100% and then a note appears with the inscription " cannot ...
0
votes
1answer
81 views

bitcoin core 0.10.1 upgrade stuck syncing

I just upgraded from Bitcoin Core 0.9 to 0.10.1 on Ubuntu 14.4 after being gone for a few months (blockchain data is from February). When I loaded up bitcoin-qt, it seemed to be working fine and ...
0
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0answers
30 views

how do I send my imported wallet on electrum

I have been able to transfer my bitcoin to electrum but am facing hard time to pay it or send my coins. A form appear and I fill out and there is only two option to choose to click create unsigned ...
1
vote
1answer
60 views

How much disk space do I need to run Bitcoin Core with txindex on?

Currently the blockchain is at 36 GB, but with txindex turn on, how big is it? And how much disk space should I get to run a Bitcoin Core node with txindex on for say a year?
0
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0answers
84 views

Mempool tracking

I'm trying to clear up some uncertainties around the mempool A tx comes in, its validated, and no other transactions have currently marked any of its inputs. Tx gets added to mempool. If a double ...
2
votes
2answers
446 views

Should I be running Bitcoin Core or Bitcoin-XT?

I just read about Bitcoin Core and Bitcoin-XT, and I want to know what is the difference between Bitcoin Core and Bitcoin-XT? And which is better Bitcoin Core or Bitcoin-XT?
1
vote
1answer
89 views

Dynamic coinbase as incentive to fill blocks

Miners do not currently have a monetary incentive to fill up blocks with transactions (tx fees are negligible compared to the coinbase tx). Those miners that do fill up the blocks may do so with the ...
-1
votes
1answer
32 views

How to check Bitcoin payments received or not

I am creating a software and i want to take anonymous payments through bitcoins and once the payment is received to my bitcoin address then the user get serial key of that software... so How i can ...
4
votes
1answer
316 views

How do I migrate to Bitcoin XT from Bitcoin Core?

Some people are saying Bitcoin XT is faster and more secure, but I don't know how to migrate from Bitcoin Core to Bitcoin XT, because I have all my coins on Bitcoin Core. What are the steps I need to ...
0
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0answers
46 views

Bitcoin Core not working

I have downloaded bitcoin core, as it was recommended by the bitcoin site. It seems as though it simply doesn't work. I've waited more than 48 hours for it to download the block and it just isn't ...
1
vote
1answer
30 views

Reduce Wallet Sync Time

So I am new to Bitcoin and I run the Bitcoin Core on my computer. I know that you need to wait for your wallet to sync before you can make transactions, but it says it won't finish syncing for 4 ...
0
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0answers
9 views

How do I transfer my wallet from bitcoin qt to electrum without downloading the whole blockchain? [duplicate]

I made a big mistake: I downloaded the bitcoin qt wallet without downloading the blockchain, but I generated an address to send bitcoins to this wallet. And the blockchain says that I received some. ...
0
votes
1answer
35 views

If port 8333 is closed, will a node relay transactions to its peers?

During a recent discussion, it was asserted that a node running Bitcoin Core behind a firewall with port 8333 closed would still relay blocks/transactions to peers. Unsolicited connections would be ...
1
vote
1answer
42 views

Estimatefee value not corresponding to actual fee

When I call estimatefee 1 in testnet it returns: 0.00044444 Then when I call sendtoaddress xxxxxx 0,1 (which got the first confirmation within a couple of minutes after sending) I see that the fee ...
2
votes
1answer
54 views

Running another instance of bitcoin-qt dedicated to testnet/regtest?

Is it possible to run another instance of bitcoin-qt dedicated to testnet/regtest? If so, how do i do this? My question is similar to "Running two bitcoind instances for different nets," but I want ...
0
votes
0answers
21 views

Bitcoind get unique newaddress

Hello all i dont know why but always getnewaddress give me many time the same address I use JSON RPC $server->getnewaddress() and i have encrypt wallet What is the good solution for get unique ...
0
votes
1answer
45 views

Bootstrap.dat incorrect or no genesis block found

Hi all i need to add bootstrap.dat after downloading i start bitcoind with -loadblock but not work i have error Incorrect or no genesis block found. Wrong datadir for network? I start bitcoin with ...
1
vote
1answer
31 views

Fixing libtool for -rpath problems

I am trying compile bitcoin on Debian 7 Wheezy (64bit) but I am encountering the error Fixing libtool for -rpath problems. I installed all dependencies sudo apt-get install build-essential libtool ...
5
votes
2answers
116 views

Who makes the decision about blocksize?

I have been running a full node for little less than a year and I am following the discussion around blocksize increase. I am for it. Who actually can make a decision whether the blocksize increase ...
0
votes
2answers
39 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
2answers
114 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 ...
-1
votes
1answer
71 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 ...
1
vote
1answer
45 views

Why does Bitcoin-QT not seem to be catching up on my Mac?

I've had Bitcoin-QT running for about six total hours, and the rate at which it's catching up is glacial at best. It takes about an hour to advance a week, which would make the process take about 4 ...
1
vote
1answer
95 views

What does Bitcoin Core's “Coin Control Features” do and how do I use it?

What is Bitcoin Core's "Coin Control Features"? How do I use it, and what can I do with it?
-2
votes
1answer
39 views

how to execute Ubuntu shell for bitcoind command in php?

i want to build a bitcoin third party server for my client. but problem is that when i execute "bitcoin-cli" command using php then it didn't give any result. i used JSONRPCClient. but i didn't find ...
0
votes
1answer
30 views

won't show my balance by “getbalance myaddress” but show balance by “getbalance”. what is the reason?

i send btc in my-server created btc address. which is created by "getnewaddress". get the payment also and it's shown by "getbalance". but i want to see the balance by "getbalance myaddress". it's ...
0
votes
1answer
35 views

What does the label field in Bitcoin-Qt mean?

I tried to get involved with Bitcoin on iPad, couldn't download a wallet and thought a paper wallet was an alternative; I generated said paper wallet and used the address to buy coins. I realized I ...