Questions tagged [client]

This tag should be used for questions regarding Bitcoin clients. A client is any application which allows a user to connect to the Bitcoin (or alternate) network. Alternately, "client" may refer to a non-standard user interface which interacts with the Bitcoin network through a standard client.

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1answer
506 views

Why did Bitcoin Core wallet send my coins to this address?

Yesterday evening I installed the Bitcoin Core wallet (v0.11.2 (64-bit) from the Chocolatey repo to my Windows 10 machine). I had some coins in an old wallet.dat that I copied to the data directory. ...
4
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1answer
107 views

Based on a certain amount of addresses, is it possible to find out how many bitcoins a specific wallet includes/owns?

Based on a certain amount of addresses, is it possible to find out how many bitcoins a specific wallet includes/owns? E.g. I have a blockchain.info wallet. If I create 1000 bitcoin addresses, fill ...
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2answers
2k views

Pregenerate multiple receiving addresses [duplicate]

In bitcoind I can generate addresses one by one. Is there a functionality that helps me generate 250 receiving-addresses for my wallet.dat at once?
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3answers
2k views

Is the synchronization process supposed to be downloading at less than 5kB/s?

I've been running the bitcoin-qt client for over a week now trying to catch up with the block chain (closer to three weeks if I count the first time I had to synchronize everything). Looking at my ...
4
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1answer
2k views

How do APIs like Blockchain.info and BlockExplorer work?

When I query an address using either service, are they simply querying the latest block that has been mined? Or do those services have nodes in the network that collect data that has not yet been ...
4
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1answer
4k views

Work rejected. Server says: Stale or alien proof of work

I get this error using BitMinter Client v1.3.2: Work rejected. Server says: Stale or alien proof of work about every 15 - 45 minutes, just mining on my GPU. What is happening? What does it mean to ...
4
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2answers
336 views

I'm trying to run Bitcoin on a weak computer, which client consumes the least resources?

I am running the standard client on a weak computer (Windows environment). It often is slow and unresponsive, and takes a noticeable chunk of the hard drive. I would want to replace it with some ...
4
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2answers
289 views

How do you determine how much money an address has?

If you get an address, and have payments sent to you, how are people able to determine how much money you have? What steps do they do to figure this out?
4
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1answer
4k views

Creating a raw transaction using Bitcoin Core v0.10.0 bitcoin-tx / createrawtransaction

I'm trying to create a raw transaction using Bitcoin Core v0.10.0 (on Windows 7 x64, and with txindex=1 optioned). Bitcoin Core v0.10.0 comes with a new Bitcoin-tx executable utility. The help menu ...
4
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1answer
436 views

How can I connect to bitcoin-qt client with public ip address

I used the bitcoin client but i want to connect to it using public ip adress not localhost. From that machine i could reach bitcoin using localhost but when I am using public ip address with the ...
4
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2answers
584 views

What GUI clients support multisig transactions?

Are there any major current UI wallets (desktop/mobile/web) that support creating / spending multisig transactions?
4
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1answer
194 views

Add a transaction generated offline to the official client

I have a transaction that I generated/signed using a custom tool. I'd like to make sure it was generated correctly by submitting it to the official client and watching the logs to see if it is ...
4
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1answer
326 views

What client to use for an alternative special purpose blockchain?

Lets say one wanted to create a blockchain for the purposes of providing a scalable back-end for accounting for the trade of some arbitrary unit between people. It would not be a tradeable currency. ...
4
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1answer
2k views

Bitcoin RPC ECONNREFUSED

Trying to RPC my local active Bitcoin Full Node, but getting ECONNREFUSED on client.getBalance. Am I missing additional configuration? Is there a better RPC wrapper to use? Any advice or working ...
4
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3answers
529 views

How can I verify my wallet.dat file against an older version?

I recently ran into an issue with an unsafe shutdown corruption on an NTFS partition in such a way that the files all existed, but chkdsk had to be run to verify some non-essential files. My peers....
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3answers
4k views

jsonRPCClient.php states its served a 401 error response

When I execute my php file from the command line I get this: <pre> PHP Warning: fopen(http://...@127.0.0.1:8332/): failed to open stream: HTTP request failed! HTTP/1.0 401 Authorization ...
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2answers
2k views

How is the previous transaction hash calculated?

Can anyone provide a clear example on how to calculate a previous transaction hash? Say I want to create a new transaction, I get that the hash is calculated by doubling sha256 a message m, but I'm ...
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2answers
1k views

Do some Bitcoin wallets fail to support sending to multi-signature addresses?

The Satoshi client has support for multi-signature transactions through the JSON-RPC API since version 0.6.1rc2. My understanding is that a multi-signature transaction creates an address which is ...
4
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1answer
223 views

Send coins from another adress

Newbie here! I need to confirm something: I have bought bitcoins and I already see them in the QT client I am using. I now want to send the bitcoins using a different address than the one I use to ...
4
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1answer
323 views

How does blockchaininfo find out the difficulty?

Do they have a client installed on their servers that pulls the info out of block headers? How does it do it? What's the command?
4
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1answer
1k views

What is the easiest to operate/fastest solo bitcoin mining client for a cluster rig?

I'm planning to set up a rig and need a solo mining client. Can you offer me some suggestions? (Please don't just tell me that solo mining isn't worth it).
4
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1answer
3k views

How do I open an Armory .wallet file in the MultiBit Client?

Sorry, I'm incredibly new to this whole thing. I started off using the Armory Client for my Bitcoin wallet then was suggested to try "MultiBit". I've saved my .wallet file from Armory, however ...
4
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1answer
241 views

Lightweight client, bare necessities

What are the bare data necessities that a lightweight client would have to get from a server client in order to perform basic wallet tasks (show balance, transaction history, number of confirmations, ...
4
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2answers
404 views

What system should I implement to make use of accounts with Bitcoin Core 'accounts' now deprecated?

I am designing one of the Bitcoin based app on Bitcoin-Core using account system. Accounts I have used to store users wallet balance in different accounts. But since I know it is deprecated, then ...
4
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3answers
555 views

Able to send 0.2BTC from old to new wallet w/o fee as of 2016?

Good evening everyone. I've been out of the cryptocurrency scene for a couple of years and I've stumbled into a minor issue. I've been trying to figure out if it will be viable to move some Bitcoin ...
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2answers
2k views

Is there a client that can export to Excel detailed information about transactions?

I need a client that has a feature of exporting full information about transactions in an Excel or CSV file. By full information I mean sender, receiver, amount, time, confirmation status. In other ...
4
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1answer
103 views

Which mobile clients allow payments using Near Field Communications (NFC)?

Which Bitcoin apps (or mobile-enabled websites) support the ability to pay using Near Field Communications (NFC)?
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4answers
4k views

I ran out of space while synchronizing, how do I get my private keys & find my balance?

OK, my most immediate concern is that I made three ~$500 bitcoin purchases this weekend and downloaded the Bitcoin-Qt client, but ran out of HDD space just before it finished synchronizing the ...
4
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1answer
99 views

Clients without Isstandard() function

Are there any bitcoin clients without the Isstandard () function which would allow non standard transactions to be broadcast?
4
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2answers
326 views

Trying to import a private key into bitcoind

I am in a special situation where I need to import my private key credentials and basically restore a wallet to bitcoind. bitcoind is running and I do have an rpc user/pass and server=1 in the ...
3
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2answers
1k views

is it possible to decode block height from a blockhash?

I'm creating a bitcoin network client and I'm wondering if it's possible to decode the block height from a blockhash whenever I receive a new block inventory vector.
3
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1answer
4k views

What is the maximum of receive addresses the default wallet can handle?

I guess there is no limit. But on tests, what is the maximum before the bitcoind start to slow down in a specific machine?
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2answers
14k views

Should you protect your Bitcoin address like your credit card number?

Today, I recieved this scam email: We have reached the biggest milestone in our history – over a million wallets. https://[removed] will celebrate with some big prizes. In October 2013, ...
3
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1answer
250 views

Can a customized or non-bitcoin node be made to talk to a bitcoin node?

Is it possible to create a node with some different code from the bitcoin nodes but still able to talk to the bitcoin nodes? Is it possible for someone to customize their own node to add some ...
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3answers
2k views

Strategies to Reduce High Transaction Fees in a Cryptocurrency Marketplace?

I’m building a cryptocurrency marketplace where users mainly buy and sell small ticket items (worth $10 - $50) using cryptocurrency. However, the "miner fees" are making it prohibitively ...
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2answers
537 views

Online bitcoin tools playground?

Currently I'm reading a great book Mastering Bitcoin and the author on his first articles suggests to the reader build from the source Bitcoin Core environment and down load the whole blockchain ...
3
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4answers
783 views

Wallets that support 40 byte message attachment via OP_RETURN? Desktop / Mobile?

I see that many new Bitcoin 2.0 apps are making use of the additional OP_RETURN parameter for attaching data. I see that max limit is 40 bytes or roughly 40 characters? My question now regarding ...
3
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2answers
526 views

Zero to Bitcoin in sixty seconds - how to set up a Bitcoin client in case you need it fast?

Lets say I have a bitcoind instance running on a server with proper wallet.dat backups created regularly. The server crashes, blockchain data becomes corrupted or what have you, and I need to set up a ...
3
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1answer
288 views

When did Satoshi Nakamoto release Bitcoin v.0.1 to the public? 08 Jan 09 or 09 Jan 09?

Many websites say Satoshi Nakamoto released Bitcoin on 09 Jan 2009 (Source 1) (Source 2) (Source 3). After looking through the Satoshi Archive, it seems to have been released on 08 Jan 2009 (Source). ...
3
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1answer
5k views

Sending bitcoins to same address

I am using the BitcoinJ API to create my wallet. When I create a transaction, I provide the change address to which change should be sent. For example: let there be 1 bitcoin at address A; then I ...
3
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1answer
2k views

How to access any transaction detail in Bitcoin version 0.8 and above?

Since the Standard Client version 0.8 removed the full index of all historical transactions, some Bitcoin applications that relied on that functionality have stopped working. For example, one is no ...
3
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2answers
494 views

What are the limitations of a Client connecting to the Network through TOR?

I've recently been reading the Weaknesses Wiki page on "Attack on all users" and I came upon this statement: The IP addresses of most users are totally public. You can use Tor to hide this, but the ...
3
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1answer
2k views

How is the UTXO database initialized?

The IDs of the unspent transactions are stored in the UTXO database. I assume that it's generated like this by the client: for block in blocks: for transaction in block: utxo.remove(...
3
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1answer
7k views

bitcoin-cli fails with auth error

I run it like the below. bitcoind -datadir=/Users/varunvb/Downloads -conf=/Users/varunvb/Downloads/bitcoin.conf -daemon When I run (Using the user name and password as in the config file) bitcoin-...
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2answers
3k views

Is there a wallet like Multibit for Litecoin?

Is there a lightweight client like Multibit available for Litecoin? If not, is one in development?
3
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1answer
681 views

How complex can my bitcoin wallet encryption key be?

What are the requirements and limitations of the password that the satoshi bitcoin wallet allows the user to set?
3
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1answer
549 views

How do I disable automatic address generation for the official bitcoin client?

This question was asked before over at bitcointalk.org over here way back in June '11. The answer back then was a resounding no. Is this still the case? My wallet.dat keeps growing bigger after every ...
3
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2answers
4k views

Is there a BSD Bitcoin client?

I have a few BSD-based systems sitting around serving away, but for the most part they're idle CPU-wise. Does anyone knew of a bitcoin client that I could run on these machines to make them more ...
3
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1answer
1k views

Bitcoin core API for address

I installed bitcoin core and now it is completely synced. I am not able to find REST Api for a particular address. I want to run my server so can i am able to make an http request for REST API
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2answers
701 views

Any documentation available that would help developing a Bitcoin Client?

I want to start developing a Bitcoin Client in a new language. For this I'm looking for references and resources that could be used to as a guide. Some kind of comprehensive guideline of what a client ...

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