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Bitcoin Miner Source Code C++

Someone Is Trying To Sneak Bitcoin Mining Code Into Open Source Software

Someone Is Trying To Sneak Bitcoin Mining Code Into Open Source Software

Someone Is Trying to Sneak Bitcoin Mining Code Into Open Source Software There havebeen some pretty creative attempts to mine bitcoins using unconventional means over the years, from lightbulbs to web browsers . But now, there appears to be a new, and malicious, method: Sneaking bitcoin mining code into open source software. If successful, this attack would mean that anyone downloading open source software implanted with bitcoin mining code could be unwittingly expending computing power and electricity to generate bitcoins, presumably for someone else. A single bitcoin is worth more than $1,000 USD at the time of writing. Here's what we know. Over the weekend, Russian open source developer Alexey Palazhchenko tweeted that his online code repository had received a request to add code to his project from a mysterious account on GitHub, a site for developers to code together. "There are few people contributing [to my project] and I want to increase that number, so at first I was happywow, a new contributor, totally out of blue, not someone I asked to contribute," Palazhchenko wrote me over email. But when he clicked on the account, he saw that it had already been banned by GitHub. This is when he became suspicious, he wrote. Read More: The Story of the 'Accidental' $137K Bitcoin Payment Just Got Very Strange Pull requests are the mechanism that developers use to request that their code be added to a project and need to be approved by the main coder. "There is no way I would accept it. [The] codebase is small, totally from a different area," he wrote. Basically, his project was small and had nothing to do with bitcoin, and so the request stuck out. Palazhchenko took his issue to the developer chatroom for people using Drone , a continuous integration tool that allows devel Continue reading >>

Bitcoin/miner.cpp At Master Bitcoin/bitcoin Github

Bitcoin/miner.cpp At Master Bitcoin/bitcoin Github

// Skip entries in mapTx that are already in a block or are present // in mapModifiedTx (which implies that the mapTx ancestor state is // stale due to ancestor inclusion in the block) // Also skip transactions that we've already failed to add. This can happen if // we consider a transaction in mapModifiedTx and it fails: we can then // potentially consider it again while walking mapTx. It's currently // guaranteed to fail again, but as a belt-and-suspenders check we put it in // failedTx and avoid re-evaluation, since the re-evaluation would be using // cached size/sigops/fee values that are not actually correct. bool BlockAssembler::SkipMapTxEntry(CTxMemPool::txiter it, indexed_modified_transaction_set &mapModifiedTx, CTxMemPool::setEntries &failedTx) // This transaction selection algorithm orders the mempool based // on feerate of a transaction including all unconfirmed ancestors. // Since we don't remove transactions from the mempool as we select them // for block inclusion, we need an alternate method of updating the feerate // of a transaction with its not-yet-selected ancestors as we go. // This is accomplished by walking the in-mempool descendants of selected // transactions and storing a temporary modified state in mapModifiedTxs. // Each time through the loop, we compare the best transaction in // mapModifiedTxs with the next transaction in the mempool to decide what void BlockAssembler::addPackageTxs(int &nPackagesSelected, int &nDescendantsUpdated) // mapModifiedTx will store sorted packages after they are modified // because some of their txs are already in the block indexed_modified_transaction_set mapModifiedTx; // Keep track of entries that failed inclusion, to avoid duplicate work // Start by adding all descendants of previously added txs to mapModifie Continue reading >>

C++ - Condition False While Mining Bitcoin Coins? - Stack Overflow

C++ - Condition False While Mining Bitcoin Coins? - Stack Overflow

Condition false while Mining Bitcoin Coins? When I tried to Mine a Coin by using Premine-Coin source code in BitcoinMiner() in main.cpp, My one condition is always false, I didn't know what is issue, because it working with Premine-coin (Original code) , when I change with my genesis, nNonce, nTime and all it will always false the condition. Please see the below mention code where if (hash <= hashTarget) is always getting false. How I can resolve this issue. int64 nStart = GetTime();uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();uint256 hashbuf[2];uint256& hash = *alignup<16>(hashbuf); loop { unsigned int nHashesDone = 0; unsigned int nNonceFound; // Crypto++ SHA256 nNonceFound = ScanHash_CryptoPP(pmidstate, pdata + 64, phash1, (char*)&hash, nHashesDone); // Check if something found if (nNonceFound != (unsigned int) -1) { for (unsigned int i = 0; i < sizeof(hash)/2; i++) { ((unsigned int*)&hash)[i] = ByteReverse(((unsigned int*)&hash)[i]); } if (hash <= hashTarget) // Problem is here: hash is always greater than hashTarget { // Found a solution pblock->nNonce = ByteReverse(nNonceFound); assert(hash == pblock->GetHash()); SetThreadPriority(THREAD_PRIORITY_NORMAL); CheckWork(pblock, *pwalletMain, reservekey); SetThreadPriority(THREAD_PRIORITY_LOWEST); break; } } Continue reading >>

21 Inc Open-sources Bitcoin Software For Machine Payments

21 Inc Open-sources Bitcoin Software For Machine Payments

21 Inc Open-Sources Bitcoin Software for Machine Payments Jun 13, 2016 at 15:45 UTC|UpdatedJun 13, 2016 at 17:45 UTC Bitcoin startup 21 Inc announced it had open-sourced its software this weekend, a move thatfinds it following through on statements bythe firm's co-founder and CEO,Balaji Srinivasan,at CoinDesk'sConsensus event last month. The release coincides with a stronger presentation of the company's long-term vision , one that will find it seeking to enable micropayments via APIs services for developers as part of a broader transition it calls the 'third web'. This terminology, the company argues, helps articulate the transition from the World Wide Web of documents and hyperlinks, to the social web,to one where economics are now involved because of bitcoin. "You couldn't really have had a Machine-Payable Web before bitcoin, because the ability of a machine to possess, send and receive currency autonomously depends critically on the nature of bitcoin private keys as bearer instruments." As we reported in May, the software can be used to connect any device to the 21 network and 21 Marketplace, capabilities that were previously only available to owners of the 21 Bitcoin Computer . After installing 21's software, userscan get bitcoin on any device in "almost any country" without a bank account or credit card, buildmicropayments into apps, and earn bitcoin withHTTP requests, the company states. 21 also continued to emphasize how its products could be used, which follows its recent trend of releasing proofs-of-concept that help contextualize its vision. In the new blog, 21 Inc suggests that themachine-payable webwould enable people to, say, avoid irksome paywalls and manually entering credit card details by clicking a link and automatically sending somedigital currency. Continue reading >>

A Blockchain In 200 Lines Ofcode

A Blockchain In 200 Lines Ofcode

I like programming and Careless Whisper. The basic concept of blockchain is quite simple: a distributed database that maintains a continuously growing list of ordered records. However, it is easy to get mixed up as usually when we talk about blockchains we also talk about the problems we are trying to solve with them. This is the case in the popular blockchain-based projects such as Bitcoin and Ethereum . The term blockchain is usually strongly tied to concepts like transactions , smart contracts or cryptocurrencies . This makes understanding blockchains a necessarily harder task, than it must be. Especially source-code-wisely. Here I will go through a super-simple blockchain I implemented in 200 lines of Javascript called NaiveChain . The first logical step is to decide the block structure. To keep things as simple as possible we include only the most necessary: index, timestamp, data, hash and previous hash. The hash of the previous block must be found in the block to preserve the chain integrity The block needs to be hashed to keep the integrity of the data. A SHA-256 is taken over the content of the block. It should be noted that this hash has nothing to do with mining , since there is no Proof Of Work problem to solve. To generate a block we must know the hash of the previous block and create the rest of the required content (= index, hash, data and timestamp). Block data is something that is provided by the end-user. A in-memory Javascript array is used to store the blockchain. The first block of the blockchain is always a so-called genesis-block, which is hard coded. At any given time we must be able to validate if a block or a chain of blocks are valid in terms of integrity. This is true especially when we receive new blocks from other nodes and must decide whe Continue reading >>

Mit Students Battle State's Demand For Their Bitcoin Miner's Source Code

Mit Students Battle State's Demand For Their Bitcoin Miner's Source Code

MIT Students Battle State's Demand for Their Bitcoin Miner's Source Code MIT Students Battle State's Demand for Their Bitcoin Miner's Source Code MIT Media Lab (where Jeremy Rubin is a researcher) MIT Students Battle State's Demand for Their Bitcoin Miner's Source Code MIT Media Lab (where Jeremy Rubin is a researcher) Four MIT students behind an award-winning Bitcoin mining tool will face off against New Jersey state authorities in court today when they attempt to fight back against a subpoena demanding their source code. The Electronic Frontier Foundation is representing 19-year-old MIT student Jeremy Rubin and three classmates in a remarkable case that stands out for the measure of aggression the state is using to obtain the code and identify anyone who might have tested the mining tool. The case is reminiscent of a federal one that targeted Aaron Swartz after he was arrested by MIT police in 2011 for downloading more than 4 million scholarly journal articles from the JSTOR digital library, offered to MIT students, to make them more widely available. Swartz faced multiple charges for his activity and killed himself as he was preparing for trial. Although there is currently no indictment or pending criminal charges against Rubin and his friends, state authorities have indicated that they believe the researchers may have violated state laws. The case marks a disturbing trend among authorities to go after researchers, innovators, tinkerers and others who try to do cutting-edge projects to help the tech community, says EFF staff attorney Hanni Fakhoury. "It's a very broad subpoena that hints at criminal liability and civil liability," he says. "For a bunch of college kids who put something together for a hackathonthey didn't make any money, the project never got off the Continue reading >>

Crypto C++ Code

Crypto C++ Code

Is there Cryptography Library for C? C# code into their C/C++ equivalent. [mirror] Go supplementary cryptography libraries. Contribute to crypto development by creating an account on GitHub. golang/crypto. Code. Pull requests 0. Naming: I'm not very comfortable with your naming of variables and methods. Some are quite unclear. For instance: UString , Rid , Sid , raw , those are very vague names. Try to name things in a way to not leave margin for misinterpretation. UString should probably be unencryptedPassword , then you could free C++ library for cryptography: includes ciphers, message authentication codes, one-way hash functions, public-key cryptosystems, key agreement schemes, and deflate compression. Nov 25, 2014 Mathematically a bijective function is used on the characters' positions to encrypt and an inverse function to decrypt. Here is source code of the C++ Program to Perform Cryptography Using Transposition Technique. The C++ program is successfully compiled and run on a Linux system. The program output Analytical services. Checking the project readiness for the realities of the crypto community Blockchain development. Smart contracts audit. Code audit, written by your programmists. awesome-cpp A curated list of awesome C/C++ frameworks, libraries, resources , and shiny things. Inspired by Compiler; Online Compiler; Debugger; Integrated Development Environment; Build Systems; Static Code Analysis; Coding Style Tools . [BSD-2]; Crypto++ A free C++ class library of cryptographic schemes. xmWEB MART] LIFEBOOK WA2/B1AWA2/A3 JX^Chf : xm. Dec 26, 2007 A simple C++ implementation of Elliptic Curve Cryptography Alas, I for one do not code for a living anymore and hence I always look for compact, to the point, implementations showing with code exactly how And, since t Continue reading >>

Cudaminer Visual Studio - Crypto Mining Blog

Cudaminer Visual Studio - Crypto Mining Blog

All About BTC, LTC, ETH mining as well as other alternative crypto currencies Quick Guide on How To Compile CudaMiner for Windows from the Source Code It seems that a lot of people are having trouble figuring out how to compile CudaMiner from source for Windows and since our readers have also requested a simple and easy to use guide, we have prepared something that should help. The process is pretty simple and straight forward, so if you follow the steps you should be able to compile the code yourself in no time, probably You need to have Visual Studio 2010 or 2012 with C++ installed, other versions might also work, but we have not tested. Download and install Nvidia CUDA Toolkit , do note that Visual Studio needs to be installed first for the CUDA Toolkit to properly work with it. You need to download the Windows versions of pthreads, OpenSSL and curl for the respective version you will be compiling for (32 or 64-bit), there is a complete package that contains all of these to make it simple for you, though they may not be the latest versions. Download the latest CudaMiner source code , use the Download ZIP button on the right to make it easier. Prepare everything for compiling the project: Create a folder where you will place all of the required files, for example CUDAMINER-WIN and extract the complete package of prerequisites in it as well as the source code of CudaMiner, you should have things look like on the image above. Open the CudaMiner-master folder and open the cudaminer.sln project file, it should load up in Visual Studio. Note that the project is in VS2010 format and if using 2012 for example you will be asked to upgrade the project to the 2012 format, choose yes. Final tweaks and compiling the project in Visual studio: Make Sure you have selected Release b Continue reading >>

Are Here People Who Study Bitcoin Source Code? : Bitcoin

Are Here People Who Study Bitcoin Source Code? : Bitcoin

Do not use URL shortening services: always submit the real link. Begging/asking for bitcoins is absolutely not allowed, no matter how badly you need the bitcoins. Only requests for donations to large, recognized charities are allowed, and only if there is good reason to believe that the person accepting bitcoins on behalf of the charity is trustworthy. News articles that do not contain the word "Bitcoin" are usually off-topic. This subreddit is not about general financial news. Submissions that are mostly about some other cryptocurrency belong elsewhere. For example, /r/CryptoCurrency is a good place to discuss all cryptocurrencies. Promotion of client software which attempts to alter the Bitcoin protocol without overwhelming consensus is not permitted. Trades should usually not be advertised here. For example, submissions like "Buying 100 BTC" or "Selling my computer for bitcoins" do not belong here. /r/Bitcoin is primarily for news and discussion. Please avoid repetition /r/bitcoin is a subreddit devoted to new information and discussion about Bitcoin and its ecosystem. New merchants are welcome to announce their services for Bitcoin, but after those have been announced they are no longer news and should not be re-posted. Aside from new merchant announcements, those interested in advertising to our audience should consider Reddit's self-serve advertising system . Do not post your Bitcoin address unless someone explicitly asks you to. Be aware that Twitter, etc. is full of impersonation. Continue reading >>

How To Mine For Bitcoins By Myself? And Is My Understanding Of Bitcoins Correct - Updated 2017 - Quora

How To Mine For Bitcoins By Myself? And Is My Understanding Of Bitcoins Correct - Updated 2017 - Quora

Sorry to disappoint you, but you probably should not mine on a macbook. Even if you have the fastest mining application available, in a pool you'd make 37 cents a week. Since you want to mine on your own, you need luck in your favor. Every hash has a very small chance of being the answer, so your first hash is as likely to be right as your 10 millionth hash. In the same way you can expect you'll get abou 10 heads when you flip a coin 20 times even though each time you flip the coin it is the same odds, you can figure out about how long it will take to mine a block on your own. Sadly, for macbook pros, with the best software on the video card, mining a block will take you 181 years of hashing. This doesn't mean that if you mined for 180 years youd be "almost there". If you mined for 180 years without finding a block, you could still expect that the first block you mine is 181 years later than whatever day it happens to be. It can be a learning experience though. Both languages can be fast, and the thing that makes them slow is how the programmer writes the code. C++ has more potential since you have more control over the actual memory and pointers and such. Your program likely will be written for the CPU rather than a graphics card, so it would be slower than that best case scenario of 181 years on average, but the algorithm to do so is here: Block hashing algorithm I hate to discourage you from writing a mining client though, since you seem to be interested in programming and the crypto behind bitcoin. Here is another thing you could work on depending on your moral alignment: Some people make brain wallets, where they use a password to generate a private key, which makes a public key they use. Some people are dumb and pick bad passwords. If you have a sha256('string') Continue reading >>

Bitcoin Mining In Programmers Point Ofview

Bitcoin Mining In Programmers Point Ofview

Bitcoin Mining in Programmers Point ofView Have you ever wonderedwhy there is noairship roots to Australia from America through Pacific? Well, google it! If you found out the reason then try to comprehend that how people have mechanized to follow the rules and regulations 3rd parties have put in forward without considering the smart way of doing things. May be for our own good. Bit harsh naah! Anyway this post is to eleborate concepts behind Bitcoin in a nutshell which is another endeavor to overcome intermediaries. Lets have a quick introduction to this before get into the programming stuffs. Bitcoin:Bitcoin is a form of digital currency which wasfound out recently as a medium for exchange over the air . This is mostly used in transaction processing and validation on peer-to-peer network exploiting cryptographic operations with the specifications and software of open source community. Bitcoins total base money supply is valued at $125 million currently . Bitcoin is simply an SHA-256 hash in hexadecimal format (256 means the number of bits associated) and will also include private/public key known only to the user which is used to spend the coin. Fig1.The input is cryptographically converted fixed sized string (hash value) SHA-256:A bitcoin is exchanged or spent by a payee to a payer using an SHA-256 hashed address which points to a wallet (file) containing the bitcoins. First a group of transactions are broadcasted to bitcoin peer-to-peer network for validation. This will be continued until one node is said to found random SHA-256 hash which starts with a specific number of 0 bits. This is to limit the amount of computing power searching a suitable number. This hash is then coupled with a nonce which is a user adjustable number starts from 0 to 232. This will be again Continue reading >>

Nbitcoin : The Most Complete Bitcoin Port (part 1 : Crypto)

Nbitcoin : The Most Complete Bitcoin Port (part 1 : Crypto)

NBitcoin : The most complete Bitcoin port (Part 1 : Crypto) Codeproject fellows, I am glad to release the first article of a serie. [NEW : Part 2 Here ] I recently ported a good part of bitcoin source code from C++ to C#. I imported almost all unit tests. NBitcoin have approximately 70 tests you can use to play and discover. This is a great learning experience that I will share with you. But Bitcoin all the technical aspects of bitcoin are too long to explain in only one article. I will start this intro by looking Bitcoin from different perspectives, talking what led to its birth, and then showing you the code. For the first part I will cover only the offline aspect of bitcoin. In other words, I will omit all protocol details, and talk about the high level cryptographic part. Bitcoin grabbed my attention when I got fed up with Paypal happily blocking my fund as they pleased, along with the bureaucratic burden, fees, lack of transparence, and lack of privacy of our banking system to make any monetary transfer. As a startup , integrating a payment provider to the website was a huge burden and cost center. I tried a lot, before using paypal that is now happily taking 5% on each transaction, and reserve the right to block my money when it pleases them. They have lawyers, so they are always right. Why is it so painful ? Why cant I transfer my money easily without any intermediary ? Just me and the customer without the middle man. Bitcoin makes it possible. For the Keynes economist, Bitcoin is a money whose central banking (FED or European central bank) cant control the supply, their poor lizard brains activate and remind them the scares of the Great Depression. By then, transforming dollar into a fiat currency (not backed by gold, but controlled by central banking) was seen Continue reading >>

Bitcoin Mining The Hard Way: The Algorithms, Protocols, And Bytes

Bitcoin Mining The Hard Way: The Algorithms, Protocols, And Bytes

Xerox Alto restoration, IC reverse engineering, chargers, and whatever Bitcoin mining the hard way: the algorithms, protocols, and bytes This article explains Bitcoin mining in details, right down to the hex data and network traffic.If you've ever wondered what really happens in Bitcoin mining, you've come to the right place.My previous article, Bitcoins the hard way described how I manually created a Bitcoin transaction and sent it into the system. In this article, I show what happens next: how a transaction gets mined into a block. Bitcoin mining is often thought of as the way to create new bitcoins. But that's really just a secondary purpose.The primary importance of mining is to ensure that all participants have a consistent view of the Bitcoin data.Because Bitcoin is a distributed peer-to-peer system, there is no central database that keeps track of who owns bitcoins. Instead, the log of all transactions is distributed across the network. The main problem with a distributed transaction log is how to avoid inconsistencies that could allow someone to spend the same bitcoins twice.The solution in Bitcoin is to mine the outstanding transactions into a block of transactions approximately every 10 minutes, which makes them official. Conflicting or invalid transactions aren't allowed into a block, so the double spend problem is avoided. Although mining transactions into blocks avoid double-spending, it raises new problems: What stops people from randomly mining blocks? How do you decide who gets to mine a block? How does the network agree on which blocks are valid?Solving those problems is the key innovation of Bitcoin:mining is made very, very difficult, a technique called proof-of-work .It takes an insanely huge amount of computational effort to mine a block, but it is Continue reading >>

Software - Bitcoin Wiki

Software - Bitcoin Wiki

List of Bitcoin-related software. See also Category:Software . Be sure to keep on top of the latest security vulnerabilities ! Main article and feature comparison: Clients Bitcoin Core - C++/Qt based tabbed UI. Linux/MacOSX/Windows. Full-featured thick client that downloads the entire block chain , using code from the original Bitcoin client. bitcoind - GUI-less version of the original Bitcoin client, providing a JSON-RPC interface MultiBit - lightweight thin client for Windows, MacOS and Linux with support for opening multiple wallets simultaneously Electrum - a "blazing fast, open-source, multi-OS Bitcoin client/wallet with a very active community" - also a thin client . Bither - open source wallet for Android, iPhone and Desktop with cold storage support. Bitcoin-js-remote - JavaScript RPC client, support for QR codes Bitcoin Webskin - PHP web interface to bitcoind Bitcoin Explorer - Bitcoin command line tools for Linux, OSX and Windows, part of Libbitcoin SDK. Armory - Enterprise grade Python-based client Spesmilo - Python/PySide RPC client (abandoned) Gocoin - WebUI client written in Go language, with a cold deterministic brain-wallet. btcd An alternative full node bitcoin implementation written in Go (golang). BlockCypher Full node bitcoin client built for scale and data centers, exposed through web APIs. Mycelium Awarded the prestigious "Best Mobile App" award by Blockchain.info in 2014, the Mycelium wallet for Android provides several security features. Blockchain - Javascript bitcoin client with client side encryption. xCoinMoney Advanced API to create invoices for subscription. Cancoin - HSM multi-sig wallet using libbitcoin. Client side encryption. Bitdollar - C++/Qt client, unstable beta version A live operating system can start on almost any computer from Continue reading >>

Modify Cryptocurrency Coin Code (bitcoin, Altcoin)

Modify Cryptocurrency Coin Code (bitcoin, Altcoin)

Modify cryptocurrency coin code (bitcoin, altcoin) Modify cryptocurrency coin code (bitcoin, altcoin) I have an existing C++ codebase for a cryptocurrency with proof-of-work (PoW) as the block generation method. The coin daemon/blockchain is configured to produce a total of ~100,000,000 coins. I need the blockchain re-configured to allow simple, fast and efficient premining of a set number of coins. You will modify the source code to do this. I assume this will be easiest by setting the miner to accept blocks with no proof of work, or temporarily set the difficulty very low. Your changes MUST be reversible and must not corrupt the blockchain. That is, after for example 5,000,000 coins are premined, you must include instructions on how to REVERSE your changes so people have to work hard to mine the rest of the coins. If you want your bid to be considered, make the last word of your proposal "glass". I will provide the source code of the project to you after bidding closes. It is based on Bitcoin, and is a well-known derivative. Continue reading >>

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