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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24 views

Bitcoin cloud trading

Is there a trading bots that trades automatically and can also be hosted by the company that is providing the service? I've found BTCRobot and Butter Bot. Any reviews on the validity behind these ...
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1answer
42 views

Critical Section in Satoshi client

Can you please point me to a tutorial for an explanation of the specific "Critical section" implementation that is used in main.cpp. I would like to understand a bit better how does it work. I studied ...
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1answer
43 views

Why does the Bitcoin core client use so much CPU time while synching?

I have always noticed the huge increase in cpu usage when I opened my client for the first time in a few days. I was wonder what this is from? I would imagine verifying all of the signatures of the ...
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10 views

BTC China ruby api wrapper

I am trying to build simple BTC China client https://btcchina.com to get account balance for training and educational purposes. I know there is https://github.com/Lewis-Clayton/Kublai gem out there, ...
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2answers
42 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
57 views

What does it mean to have -1 confirmations?

I have -1 confirmations for an inbound transaction on my Electrum wallet. What does is it mean to have -1 confirmations?
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1answer
42 views

How does bitcoind find p2p hosts? [duplicate]

I read the bitcoin references but I can't find a description regarding how bitcoin clients find other host in the p2p network. Would you please tell me?
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0answers
41 views

Build Altcoin-qt, keep getting 'This application has request the runtime to terminate it in an unusual way' error

I successfully built my coin on my laptop using Qt4.8.6, but get this error when I try to solo mine it. I can solo mine, but the error pops up. If I click 'ok', it shuts the program down and I can't ...
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55 views

Building Altcoin, getting undefined reference to CTxDB error

I am trying to build an altcoin under Windows. It has compiled just fine under Linux. I installed all the dependencies, updated my path, and installed Qt for qmake. I am partially following the guide ...
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1answer
41 views

blockchain - strange problem

I have Windows 7 and i’m using the bitcoin-qt client v0.8.6-beta. Last night i tried to open up the client – but there was a message that said i had some issues with the blockchain. Which is weird, i ...
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1answer
98 views

0 Active Connection on my-new-coin

I have compiled my-newcoin-qt and my-newcoind on different platforms (windows, Linux and Mac), with my coin specification based on litecoin. When I run my-newcoin-qt at the first time, I get no error ...
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1answer
68 views

How to make a CryptoCurrency (Using Scrypt pref.) in depth

Ive tried multiple google searches (Some even linking to this Q&A Site itself!) and cant find a proper guide. I know this probably wont be easy, but im really determined, and do know how to code ...
3
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1answer
84 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 ...
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0answers
26 views

How are mutated transactions prevented from getting relayed?

Github release notes: ...transaction rules [are] tightened to prevent relaying and mining of mutated transactions... Since the mutated transactions are "equally valid", how does the client ...
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1answer
26 views

Optimising the inputs for a transaction

I have a list of unspent outputs. Let's say: 0.4 BTC, 0.6 BTC and 1.0 BTC. Now I want to create a new transaction for a 0.5 BTC. How I understand it, it would be best to take the 0.6 BTC output as ...
3
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1answer
45 views

How will the new Internet Neutrality Act affect Bitcoin?

How do you think the neutrality act that is being talked about as I write this post will affect the Bitcoin community. Not only in transactions, but mining, how will it affect Bitcoin economically ...
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2answers
93 views

Unable to establish connection to bitcoin using json and php

I'm newbie to bitcoins. Im trying to get the info, as much as I can. I'm trying to get the information by using getinfo() method that is mention in api documentation. The code i have tried is ...
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2answers
423 views

Why don't developers switch from bitcoin-qt to a cleaner implementation?

The "reference client" bitcoin-qt receives a lot of complaints from developers on the messy way it was coded. It seems to require a big overhead to learn, and a lot of time is being spent on ...
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0answers
83 views

BTCJam API 500 errors

I am currently trying to set up an application using the BTCJam api. I think the api could be very useful, but I have been unable to get it to work fully, and since support isn't responding, I thought ...
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1answer
38 views

How to transfer different cryptocoins from one daemon to another

How to transfer different cryptocoins from one daemon to another. I want to send currency from dogecoin to bitcoin, I think trading engine do such process. Can I implement such process across local ...
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2answers
113 views

How trade engine works? [closed]

How cryptocoin trade engine works? Is there any open source project available other than buttercoin. I want to build a simple trade engine in ruby on rails for cryptocoins. what are the essential ...
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1answer
50 views

Is there a way to chain calls in Bitcoin core console?

Is there a way to chain calls in Bitcoin core client console window like this validateaddress (getaccountaddress "") instead of getaccountaddress "" validateaddress _address from previous call_
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2answers
617 views

Can two private keys generate the same (public) Bitcoin address?

I know that private key is generated randomly by wallet. Is it possible that wallet generate the same address which is used in Bitcoin? In other words: Given two private keys ka ≠ kb, is it ...
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1answer
46 views

What was the first official BTC miner software?

I know that the first and official wallet is bitcoin-qt. This wallet has code here: https://github.com/bitcoin/bitcoin What was the first official miner software? I understand that bitcoin-qt never ...
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1answer
127 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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0answers
48 views

Empty amount sent with bitcoind

i am usng JSON PHP to send money from my address to another one, He send the first time normally, tested with (0.002 BTC) And when i test second one, he send empty AMOUNT (0.0 BTC) and charge for ...
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2answers
83 views

Where to find cryptocoins current price

How can I find API (json data) for cryptocoins current ask/high/low/average price. Is there any website that provides that ticker information for all coins. For example BTC/LTC ticker info is ...
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1answer
50 views

Bitcoin client from command line without blockchain [duplicate]

Any bitcoin client used on linux plateform to send bitcoin from address to another one without using blockchain or full node like bitcoind ? Thank you
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0answers
30 views

Send bitcoin automatically without blockchain [duplicate]

How to send bitcoin from my address to another one without updating or using blockchain on Bitcoind ? I want create PHP Script that do it automatically when someone pay invoice and he will receive ...
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1answer
411 views

RPC server with bitcoin-qt and bitcoind has a different set of commands?

When running bitcoin-qt -server, I am able to run the getbalance command, and the help command shows many items: ~ > bitcoin-qt -regtest -server # Running in another shell ~ > bitcoin-cli ...
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1answer
61 views

Is Bitcoin full decentralized network or how client connect to the network?

I read that Bitcoin is full decetralized network, but I don't understand how Bitcoin's client can connect to the network. I think that client must use some server for this action like other P2P ...
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1answer
35 views

Is it possible to create a system for 'shared wallets' on top of bitcoin?

Is it possible to build a system on top of bitcoin, where: Random people will deposit money in a wallet X. Nobody has access to that wallet. After a few months, those users will vote in other ...
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1answer
2k views

How can I create a new wallet on Bitcoin Core?

How can I create a new wallet on Bitcoin Core (Bitcoin QT)? I forgot my old password, so I can't create transactions using the old wallet. I don't have money on my old wallet, I just need to create ...
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1answer
103 views

Options for a Client Only C# application

If I want to create a client only, C# desktop application, what are my options for working with Bitcoin? I could try to port BitcoinJ, which seems like a lot of overhead in terms of initial effort ...
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2answers
155 views

How to create a SPV client?

What are the steps a SPV client takes in order to sync? Connect to a peer Set bloom filter for wallet addresses Download all block-headers since latest checkpoint Request every block again with ...
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0answers
204 views

Ws2tcpip.h and winsock2.h on Window QT Wallet

Been trying for the past few days but couldn't get it working, I already download the latest cryptopp library but its seems that maxcoin got some issue compiling If I qmake "USE_UPNP=-" ...
1
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1answer
36 views

Help with missing transaction

I'm trying to learn how to programmatically interact with the Bitcoin protocol. I've, seemingly, successfully generated a private key, WIF, and public address with code. I used Coinbase to send .001 ...
2
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2answers
204 views

I think my bitcoin wallet was hacked. What to do?

I opened bitcoin-qt after not mining for a couple months and found that I suddenly have no more bitcoins! And I see that there were 2 transactions that I did not authorize sending my coins to other ...
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1answer
52 views

Where is the code that receives blocks that miners have just solved

I was just looking through the Bitcoin code but since I am relatively new to C++ I was wondering, if anybody could tell me where the code responsible for receiving blocks that have just been mined by ...
2
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0answers
55 views

Historical prices via API for major alts (not BTC)

I am trying to build a small project of mine using historical prices for major alternative currencies such as LTC, DGC, MOON, TIPS, etc and so far I managed to collect only current prices of cryptsy ...
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2answers
316 views

Sending bitcoins from wallet without downloading the blockchain or giving up control

I can generate a bitcoin wallet at bitaddress.org, and I can verify that I have received payments at blockchain.info. But if I want to send bitcoins from my wallet, I know only of 2 ways: Use ...
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1answer
40 views

Test failure for Multibit on Windows

I am trying to compile Multibit on Windows: Windows 7, IDEA 13.0.2, Maven 3.0, Multibit 0.5.16. I am able to compile, but when I try to test there are always 2 failures: Running ...
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104 views

How does the satoshi client handle endianness?

I'm looking through the source code of the satoshi client, particularly into how transactions are serialized and sent through the network or stored to the disk. The CTransaction class has this block: ...
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0answers
21 views

Decentralized storage of funds for a BTC app

We are making an app similar to the raffle system but using BTC. At some point we need to store the funds of the participants. But we do not want to do this. We would want commitment from the ...
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0answers
38 views

How can I tell Bitcoin to only spend confirmed inputs and self created outputs

I want to make sure that the transactions I create with the original client are always using confirmed inputs and self created outputs. Bitcoin used one of the transactions that I describe here in ...
2
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4answers
404 views

I am new to Bitcoin, how can I get started? [closed]

I am new to both here and to the new online currency called Bitcoin. I understand what Bitcoin is and how it works, but I was wondering how do you actually get started with Bitcoin? I have read some ...
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0answers
42 views

Do mining clients affect efficiency of mining?

Excuse my ignorance. I'm new to this. When trying to start mining, does it matter which client I choose to do the mining? If so, to what end?
0
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1answer
224 views

Miners don't detect ASIC Devices

When I try to add devices to BFGMiner and BitMinter, Only 3/4 devices will be detected, When I go to Devices and Printers (In Windows 7) it shows all of my ASIC Miners. Here is the error: 2014.02.26 ...
2
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1answer
1k 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?
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2answers
174 views

How do I test my wallet backup?

I follow the instructions for wallet backup and save them digitally. What's a convenient way to occasionally test my wallet backup. I want to make sure that I'm not doing something stupid & my ...