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A genesis block is the first block of a block chain. Modern versions of Bitcoin number it as block 0, though very early versions counted it as block 1. The genesis block is almost always hardcoded into the software of the applications that utilize its block chain. It is a special case in that it does not reference a previous block, and for Bitcoin and almost all of its derivatives, it produces an
Warning: Refrain from utilizing Vanitygen on live websites. Using Vanitygen on websites is not recommended, as there is a high likelihood that these platforms might store the generated address's key, putting your results and coins at risk of being stolen. For a more secure approach, consider employing Vanitysearch by Jean Luc Pons, an open-source and trusted alternative available on GitHub. Vanity
This page describes the behavior of the reference client. The Bitcoin protocol is specified by the behavior of the reference client, not by this page. In particular, while this page is quite complete in describing the network protocol, it does not attempt to list all of the rules for block or transaction validity. Type names used in this documentation are from the C99 standard. For protocol used i
Note: This page is seriously outdated and largely unmaintained; due to past incidents of edit-warring it has not been subject to much peer review. A Bitcoin full node could be modified to scale to much higher transaction rates than are seen today, assuming that said node is running on a high end servers rather than a desktop. Bitcoin was designed to support lightweight clients that only process sm
Miner fees are a fee that spenders may include in any Bitcoin on-chain transaction. The fee may be collected by the miner who includes the transaction in a block. Overview Every Bitcoin transaction spends zero or more bitcoins to zero or more recipients. The difference between the amount being spent and the amount being received is the transaction fee (which must be zero or more). Bitcoin's design
A distributed contract is a method of using Bitcoin to form agreements with people via the block chain. Contracts don't make anything possible that was previously impossible, but rather, they allow you to solve common problems in a way that minimizes trust. Minimal trust often makes things more convenient by allowing human judgements to be taken out of the loop, thus allowing complete automation.
Blockchain-based currencies use encoded strings, which are in a Base58Check encoding with the exception of Bech32 encodings. The encoding includes a prefix (traditionally a single version byte), which affects the leading symbol(s) in the encoded result. The following is a list of some prefixes which are in use in the reference Bitcoin codebase.[1][2][3] Decimal prefix Hex Example use Leading symbo
Overview The "raw transaction API" was introduced with Bitcoin-Qt/bitcoind version 0.7. It gives developers or very sophisticated end-users low-level access to transaction creation and broadcast. JSON-RPC API listunspent [minconf=1] [maxconf=999999] Returns an array of unspent transaction outputs in the wallet that have between minconf and maxconf (inclusive) confirmations. Each output is a 5-elem
Proof of Stake is a proposed alternative to Proof of Work. Like proof of work, proof of stake attempts to provide consensus and doublespend prevention (see "main" bitcointalk thread, and a Bounty Thread). Because creating forks is costless when you aren't burning an external resource Proof of Stake alone is considered to an unworkable consensus mechanism.[1] It was probably first proposed here by
There are two variations of the original bitcoin program available; one with a graphical user interface (usually referred to as just “Bitcoin”), and a 'headless' version (called bitcoind). They are completely compatible with each other, and take the same command-line arguments, read the same configuration file, and read and write the same data files. You can run one copy of either Bitcoin or bitco
While transactions are signed, the signature does not currently cover all the data in a transaction that is hashed to create the transaction hash. Thus, while uncommon, it is possible for a node on the network to change a transaction you send in such a way that the hash is invalidated. Note that this just changes the hash; the output of the transaction remains the same and the bitcoins will go to
Bitcoin uses a scripting system for transactions. Forth-like, Script is simple, stack-based, and processed from left to right. It is intentionally not Turing-complete, with no loops. A script is essentially a list of instructions recorded with each transaction that describe how the next person wanting to spend the Bitcoins being transferred can gain access to them. The script for a typical Bitcoin
There are many different types of Bitcoin mining software available. These tables should help you find what will work best for your mining. information Info BFG BitMinter BTCMiner cgminer Diablo EasyMiner gMinor MPBM OSFPGABM Phoenix poclbm Ufasoft ScalaMiner
Controlling Bitcoin Core Run bitcoind or bitcoin-qt -server. You can control it via the command-line bitcoin-cli utility or by HTTP JSON-RPC commands. You must create a bitcoin.conf configuration file setting an rpcuser and rpcpassword; see Running Bitcoin for details. Now run: $ ./bitcoind -daemon bitcoin server starting $ ./bitcoin-cli -rpcwait help # shows the help text A list of RPC calls will
This article may be too technical for some users. The more basic article on Bitcoin Addresses may be more appropriate. A Bitcoin address is a 160-bit hash of the public portion of a public/private ECDSA keypair. Using public-key cryptography, you can "sign" data with your private key and anyone who knows your public key can verify that the signature is valid. A new keypair is generated for each re
Byte-map of Transaction with each type of TxIn and TxOut A transaction is a transfer of Bitcoin value that is broadcast to the network and collected into blocks. A transaction typically references previous transaction outputs as new transaction inputs and dedicates all input Bitcoin values to new outputs. Transactions are not encrypted, so it is possible to browse and view every transaction ever c
Reward types & explanation: CPPSRB - Capped Pay Per Share with Recent Backpay. [1] DGM - Double Geometric Method. A hybrid between PPLNS and Geometric reward types that enables to operator to absorb some of the variance risk. Operator receives portion of payout on short rounds and returns it on longer rounds to normalize payments. [2] ESMPPS - Equalized Shared Maximum Pay Per Share. Like SMPPS, bu
Bitcoin API call list (as of version 0.8.0) Note: up-to-date API reference can be found here. Common operations Listing my bitcoin addresses Listing the bitcoin addresses in your wallet is easily done via listreceivedbyaddress. It normally lists only addresses which already have received transactions, however you can list all the addresses by setting the first argument to 0, and the second one to
See also: Non-specialized hardware comparison Below are statistics about the Bitcoin Mining performance of ASIC hardware and only includes specialized equipment that has been shipped. GPUs, CPUs and other hardware not specifically designed for Bitcoin mining can be found in the Non-specialized_hardware_comparison. Notes: Mhash/s = millions hashes per second (double sha256 raw speed performance; ma
For the unit, see satoshi (unit). Satoshi Nakamoto is the founder of Bitcoin and initial creator of the Original Bitcoin client. He has said in a P2P foundation profile[1] that he is from Japan. Beyond that, not much else is known about him and his identity. He has been working on the Bitcoin project since 2007.[2] His involvement in the Bitcoin project had tapered and by late 2010 it has ended. T
Bitcoin usage worldwide. Bitcoin is a decentralized digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: transaction management and money issuance are carried out collectively by the network. The original Bitcoin software by Satoshi Nakamoto was released under the MIT license. Most client softwar
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