nyuuzyou/wikis huggingface dataset:
UnitedMiners

This pool pays out using a proportional share reward system (your shares / total shares for the round) = % share of the rewards.
The service was first available on July 22nd, 2011.
==Features==
* TXT/SMS idle miners notification (US numbers only)
* Built on redundant clustered systems, all servers are in a cluster, even the firewall and load balancer.
* Offers managed rig OS (Linux) that features an iPhone/Mobile internet page. You can update and check on your rig from your cell phone. Enables easy overclocking and monitors itself for heat problems.
==Reward distribution==
* Proportional: 3% fee.
==See Also==
* Comparison of mining pools
* Pooled Mining
==External Links==
* web site
==References==
Category:Pool Operators
Units

Most commonly, units of bitcoin are expressed in decimal exponents such as BTC ("bitcoins"), mBTC ("millibitcoins") and μBTC ("micro-bitcoin or bit ").
==Decimal metric units==
The BTC unit was chosen to represent a value of 108 so as to give sub-unit precision rather than large whole numbers.
Mirroring the standard Le Système International d'Unités, this allows for divisions of 1/10th (deci-bitcoins, dBTC), 1/100th (centi-bitcoins, cBTC), 1/1 000th (milli-bitcoins, mBTC), and 1/1 000 000 (micro-bitcoins, μBTC).
===Bits===
Many have adopted the practice of referring to the micro-bitcoin metric sub-unit as "bits".
==Table of all units==
This table is intended to include all well-defined units of bitcoin value, including less common and niche units.
Unit 	Abbreviation	Decimal (BTC) 	Alternate names 	Info
Algorithmic maximum 	 	20,999,999.9769     	 	Calculation
tam-bitcoin 	 	2,814,749.76710656 	 	1,0000,0000 tonal
mega-bitcoin 	MBTC 	1,000,000         	 	Rare in context
kilo-bitcoin 	kBTC 	1,000          	 	Rare in context
hecto-bitcoin 	hBTC 	100          	 	Rare
Initial block subsidy	 	50          	 	Until block 210000
bong-bitcoin 	ᵇTBC 	42.94967296 	 	1,0000 tonal
Current block subsidy	 	6.25        	block 	As of halving day 2020, block 630000
deca-bitcoin 	daBTC 	10          	 	Rare
mill-bitcoin 	ᵐTBC 	2.68435456 	 	1000 tonal
bitcoin 	BTC 	1          	coin 	SI base unit
san-bitcoin 	ˢTBC 	0.16777216 	 	100 tonal
deci-bitcoin 	dBTC 	0.1        	 	Rare
ton-bitcoin 	ᵗTBC 	0.01048576 	 	10 tonal
centi-bitcoin 	cBTC 	0.01       	bitcent 	Formerly frequentBitcents were frequent until the November 2013 bubble
milli-bitcoin 	mBTC 	0.001      	millibit, millie 	Occasional
bitcoin 	TBC 	0.00065536 	 	Tonal base unit
bitcoin-ton 	TBCᵗ 	0.00004096 	 	0.1 tonal
bitcoin-san 	TBCˢ 	0.00000256 	 	0.01 tonal
micro-bitcoin 	μBTC 	0.000001   	bit 	Frequent
bitcoin-mill 	TBCᵐ 	0.00000016 	 	0.001 tonal
 	 	0.0000001  	finneyAfter Hal Finney, Bitcoin Pioneer 	
bitcoin-bong 	TBCᵇ 	0.00000001 	 	0.0001 tonal
 	sat 	0.00000001 	satoshi 	Blockchain value
 	msat 	0.00000000001 	millisatoshiReceiving and receiving payments	Payment channel value
==See also==
*Tonal Bitcoin
*Satoshi (unit)
==References==
de:Einheiten
Uphold

Launched in November 2014 Uphold.com is a cloud based financial service platform that enables anyone, anywhere to move, convert, hold and transact in any form of money or commodity instantly, securely and for free. 
Uphold is the first ever financial service company to publicly share its reserve holdings in real time. Keeping the reserve equal to or greater than member deposits, guarantees safety, security and accessibility. Uphold is audited quarterly to verify solvency.
==Deposits==
* Bitcoin
* Bank Transfer
* Credit / Debit Card
* Cash 
==Withdrawals==
* Bitcoin
* Bank Transfer
* Precious Metals (via AU Secure) 
==Transparency and Auditing==
* Uphold publishes a real-time, verifiable, Proof of Reserves audit of their assets and obligations.
* Uphold applies a Full Reserve Banking policy.
* Best in class security, designed and monitored by global experts.
Utorg

==About==
UTORG a fintech company that offers а modern fiat to crypto exchange infrastructure. The company's main business activity is providing service of purchasing cryptocurrency with a bank card. Leveraging AI technology, the company succeeded in automating the KYC/AML procedure, thereby significantly speeding up the purchase process. 
===Licenses and certificates===
UTORG is incorporated in Estonia and is regulated by the Estonian Financial Intelligence Unit.
The company holds Estonian cryptocurrency license which allows to conduct the following business activities:
* Providing services of exchanging a virtual currency against a fiat currency
* Providing a virtual currency wallet service
* Providing services of exchanging a virtual currency against a virtual currency
The company holds PCI DSS Level 2 certificate which confirms compliance with high international standards of bank card data protection.
=== Payment options ===
UTORG supports all types of bank cards:
* Virtual cards
* Debit cards
* Credit cards
* Prepaid cards
In addition, it is possible to make a purchase through bank transfer.
 
=== World-leading fraud protection ===
The company has implemented 3D Secure 2.0 which creates an authentication data connection between UTORG, VISA and MasterCard, and financial institutions to be able to analyze and share more intelligence about transactions. The protocol helps to verify the transaction and the identity of the consumer legitimately, accurately, and at lightning speed.
==See Also==
* Exchanges
==External Links==
* Utorg.pro website
==References==
Category:Exchanges
Category:Local
Category:Mining_contractors
VCX

A market exchange site serving those trading between Bitcoins and EUR and USD and GBP. The Service is FREE (0% Fees)
==Adding Funds==
===BTC===
Bitcoins funds are credited to the exchange account after six confirmations. Deposit fee - 0 BTC / 0 LTC
===GBP===
GBP wire deposit fee - 0 £. 
 
===EUR===
EUR wire deposists fee – 0 EUR 
===USD===
USD wire deposists fee – 0 USD. 
==Withdrawing Funds==
===BTC===
Bitcoins withdrawal fee - 0.05 BTC / 5 LTC/.
===EUR===
SEPA withdrawal fee 10.00 EUR. 
===GBP===
SEPA withdrawal fee 7.00 £.
===USD===
Wire withdrawal 10 Us$
==History==
The Exchange was designed by people with commodities trading deep experience.
The First release was oriente to Spot trading; Options and Futures contracts will be added shortly.
The service is free to use (0% fees) on trading. Small commission are implemented to payback on withdrawal. 
The small fees payed on withdrawal are used also to pay backoffice management that manually operate transfers (the system is full cold, so no way to steal coins).
As of April 10, 2017, VCX is facing a major SSL vulnerability, therefore it's strongly advised to do not use its service.http://imgur.com/a/8YDeb
==See Also==
* Buying bitcoins
* Selling bitcoins
==External Links==
* VCX Exchange
==References==
Category:Defunct exchanges
VMC

Virtual Mining Corp was a company run by an individual who made claims to several ASIC hardware developments and sought investment by common members of the public.
Many of their claims were refuted. By the 6th of February 2015, the State of Missouri had found "Multiple Violations of Offering and Selling Unregistered, Non-Exempt Securities" in relation to the investments sought for VMC, AMC (Active Mining Corporation), and ActM (Virtual ActiveMining).
==Chronology==
date/linksummary
2013/03/26 110nm mention/specs, 45nm mention/specs: 6-9Gh, 28nm mention/specs: 9-15Gh
2013/03/26 45nm mention
2013/04/09 mention of purchasing Avalon chips
2013/05/03 statement that they are indeed purchasing Avalon chips for their 110nm machines
2013/05/20 45nm Dec 2013, 28nm Jun 2014
2013/06/08 45nm freq 300MHz, 28nm freq 450Mhz+
2013/06/27 eASIC mention, Global Foundries mention, 28nm specs: 16Gh:11.136W@800Mhz, 20Gh@1000Mhz, 27x27mm die, FCBGA672
2013/07/04 28nm topology: easicopy
2013/07/05 28nm specs (core voltage): 16Gh@1.15V:800Mhz
2013/07/10 45nm skip mention
2013/07/23 possible new logo, never used
2013/07/23 28nm: oct/nov 2013 date
2013/09/04 eASIC codev confirmation
2013/12 "People's ASIC" approached
2014/01/21 55nm, UMC, codev: "People's ASIC", tape-out+IP acquisition, topology: full custom
2014/01/22 package: 11x11mm, 1.9Gh/s, 2.5W
2014/01/30 55nm Q2 2014, 28nm Q3 2014
2014/02/13 first 55nm wafers expected April 10th
2014/02/13 first 55nm chips expected to ship April 17th
2014/02/20 mention of 'a new vendor' for 28nm
2014/02/20 mention of eASIC NRE recovery (i.e. eASIC no longer being used)
2014/03/02 interview in which 55nm cancellation is purportedly mentioned
2014/03/02 55nm acknowledged as canceled, also mentions 'a 28nm chip', rather than 'the 28nm chip'
2014/03/07 28nm date is now 'a moving target'
2014/03/31 pictures of mine being set up, boards are HashFast.
2014/03/31 "It is a chip that we purchased in bulk and we are reselling in on our manufactured boards as our Fast-Hash One chip." - i.e. not their own chip design.
2014/03/31 "still working on developing our own 28nm chip"
2014/05/14 "We are working on getting our own chip, this is high priority."
2014/06/24 last post by kslaughter
2014/06/29 last activity by kslaughter
2015/02/06 State of Missouri court declaration in re VMC/AMC, finding "Multiple Violations of Offering and Selling Unregistered, Non-Exempt Securities".
VServer

Available for computer consulting, administration, support and quality testing. 
Interested in telecommuting by offering remote assistance.
==External Pages==
* Offering remote GNU Linux administration
* http://www.vserver.si Vserver Hosting Services web site
* http://www.smart-weblications.com/vserver/ Smart Weblications KVM VServer web site
Category:Freelancers
Category:Freelancers-Technical Support
Value overflow incident

On August 15 2010, it was discovered that block 74638 contained a transaction that created 184,467,440,737.09551616 bitcoins for three different addresses.
Two addresses received 92.2 billion bitcoins each, and whoever solved the block got an extra 0.01 BTC that did not exist prior to the transaction.
This was possible because the code used for checking transactions before including them in a block didn't account for the case of outputs so large that they overflowed when summed.http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2010-5139
A new version of the client was published within five hours of the discovery that contained a soft forking change to the consensus rules that rejected output value overflow transactions (as well as any transaction that paid more than 21 million bitcoins in an output for any reason)."Fix for block 74638"Satoshi Nakamoto
The block chain was forked.
Although many unpatched nodes continued to build on the "bad" block chain, the "good" block chain overtook it at a block height of 74691 at which point all nodes accepted the "good" blockchain as the authoritative source of Bitcoin transaction history.
The bad transaction no longer exists for people using the longest chain.
Therefore, the bitcoins created by it do not exist either.
While the transaction does not exist anymore, the 0.5 BTC that was consumed by it does.
It appears to have come from a faucet and has not been used since.
==See Also==
* Common Vulnerabilities and Exposures
== References ==
Category:Notable transactionsCategory:2010 events
Vanity mining hardware comparison

==Traditional mining==
==Split-key mining==
===Graphics cards===
Model 	Price	Availability	Avg. Mkey/s (Multiplicative)	Avg. Mkey/s (Additive)	Avg. MHash/s	Key/Hash ratio (mult.)	Key/Hash ratio (add.)
ATI Radeon HD 5870 	 	 	 	30 	400 	 	0.075
MSI R5850 Twin Frozr II	 	 	 	23.5 	365.5 	 	0.0643
ATI Radeon HD 6970 	 	 	 	19.3 	410 	 	0.047
ATI Radeon HD 5850 	 	 	 	22 	340 	 	0.065
ATI Radeon HD 5770 	 	 	 	15.1 	230 	 	0.066
==See also==
* Mining hardware comparison
Vanitygen keysearch rate

What key search rate can I expect from hardware X?
Detailed list forthcoming. Some ballpark estimates are listed below.
 Dual-core desktop CPUs, 32-bit mode: 100-250 Kkey/s.
 Dual-core desktop CPUs, 64-bit mode: 150-450 Kkey/s.
 Quad-core desktop CPUs, 32-bit mode: 200-400 Kkey/s.
 Quad-core desktop CPUs, 64-bit mode: 300-750 Kkey/s.
 NVIDIA GT200 GPUs: up to 6.5 Mkey/s
 AMD Radeon 58XX, 68XX GPUs: up to 23.5 Mkey/s.
 AMD Radeon 69XX GPUs: up to 19.5 Mkey/s.
As vanitygen performs a lot of large integer arithmetic, running it in 64-bit mode makes a huge difference in key search rate, easily a 50% improvement over 32-bit mode. If you are using a 64-bit edition of Windows, and not using a GPU, be sure to use vanitygen64.exe.
Radeon 58XX outperforms Radeon 69XX by a very comfortable margin. Oclvanitygen is sensitive to integer multiply throughput, and Radeon 58XX can multiply concurrently with other operations. At similar clocks, a hobbled Radeon 5830 will outperform a Radeon 6970.
In custom builds, CPU performance will be less than expected if the OpenSSL library is an older version (<1.0.0d) or is not built with the appropriate optimizations enabled.
== Keysearch Rates ==
CPU 	GPU 	keys/s 	Comment
Core2 Duo 6600 	nVidia GTX 285	3.5 Mkey/s 	100% CPU / 90% GPU
Sempron 140 	AMD 5830 	5.5 Mkey/s 	100% CPU / 60% GPU
Core i7 	AMD 6500M 	4.5 Mkey/s 	98% GPU
Core i5 750 @2.67 GHz	nVidia GTS 250	1.54 Mkey/s	110% CPU
Vault of Satoshi

Vault of Satoshi is a exchange that allows you to trade fiat currency to bitcoins with other members of the Exchange.
==Deposits==
* Interac Online Deposits
* On-site Interac debit
* Vault of Satoshi Codes (created and redeemed from Vault of Satoshi)
* Bank Wire
* PAD (Pre-Authorized Debit)
* Online Bill Payment
* InstaBT
==Withdrawals==
* Vault of Satoshi MasterCards
* Vault of Satoshi Interac Debit Cards
* Paypal
* EFT Bank Transfers
==History==
The exchange was opened for public penetration testing in April 2013, and after extensive testing publicly on October 7th, 2013. 
* Vault of Satoshi is the first exchange in the world to use a 100% transparent audit using the open source software found here.
==See Also==
* Buying bitcoins
* Selling bitcoins
==External Links==
* Vault of Satoshi exchange website
==References==
Category:Defunct exchanges
Category:EWallets
Vbbb.com

This business has shut down its services, and the domain name is no longer operational. Please exercise caution to avoid any copies or phishing attempts.
'''
== VBBB.COM ==
VBBB.COM is a white-label solution for cryptocurrency exchanges.
==History ==
The VBBB platform is owned and operated by RUA Innovations LTS and based on BVI.
The company was established in 2012, and since the moment when VBBB platform started running it shows a rapid growth in both customer base and provided trade volume. 
==Features==
VBBB Platform works on the principle of the franchises distribution with a single order book for all its customers what gives the maximum possible volume of trading. 
VBBB uses Erlang, Python and JS at the expert level. 
VBBB platform provodes the customer with the following functionality:
* Create own logo, brand and design
* Provide matching up to 1,700 orders per second as part of one of the servers
* FIX/FAST protocol
* Realtime API (plus widgets ready for broadcasting of the exchange rate on third-party resources)
* KYC module for his clients
* Adding any trading pairs
* Ensuring the liquidity of trading for major cryptocurrences
* CMS
* CRM
* ColdWallets
* Mobile version of the site(terminal) with company logo
* Trader's terminal wih positions, SWAP and margin trading
* Affiliate module
* 2FA - the optional possibility to protect users account is a two-factor authentication, it's special case of a multi-factor authentication. The available application is Google Authentication
* Google analytics module
* OAuth (Facebook, VK, Twitter etc.)
* MailChimp module
* Chat with moderation and the ability to connect via jabber
* Professional dashboard
==API== 
VBBB.COM provides an API which is possible to use for automate operations.
==Trading Pairs==
VBBB.COM supports the exchange between the major currency pairs, such as:
*BTC/USD
*LTC/USD
*EUR/USD
*LTC/BTC
*BTC/EUR
*LTC/EUR
*NMC/USD
*NVC/USD
*TRC/BTC
*PPC/USD
*FTC/BTC
*XPM/BTC
==External links==
*VBBB.COM website
Category:Defunct exchanges
Vera&John

Vera&John is the first licensend and regulated online casino to support deposits and withdrawals in Bitcoin. NetEnt, Play'n GO, Betsoft, IGT, Nextgen Gaming, Bally Technologies. Operated by Dumarca Gaming Ltd. Northfields, Apartment 2, Suite 6, Independence Avenue, Mosta, Malta. Licence issued and regulated by Malta’s Lotteries and Gaming Authority: LGA/CLl/552/2009
==Games==
Baccarat
Blackjack
Roulette
Video Poker
Card Games
Scratch Cards
Slots & Video Slots
Keno
==External Links==
Vera&John
How to use Bitcoin at Vera&John
==Reviews==
*Vera&John Bitcoin Review
Version Handshake

On connect, version and verack messages are exchanged, in order to ensure compatibility between peers.
==Version Handshake==
When the local peer (L) connects to a remote peer (R), the remote peer will not send any data until it receives a version message.
 L -> R: Send version message with the local peer's version
 R -> L: Send version message back
 R -> L: Send verack message
 R: Sets version to the minimum of the 2 versions
 L -> R: Send verack message after receiving version message from R
 L: Sets version to the minimum of the 2 versions
Note: Versions below 31800 are no longer supported.
VertCoin

VertCoin (VTC) was created in early 2014 to overcome concerns that the centralization of mining that has occurred with Bitcoin, has reduced the security of Bitcoin. VertCoin is advertised as being ASIC resistent and multipool resistant, although neither of these properties are actually possible.
== References ==
* https://bitcointalk.org/index.php?topic=404364.0
* http://vertcoin.com/
Vibanko

A former EWallet provider.
This servicewais provided by the Bitcoin Consultancy, operators of the Intersango exchange. 
The software that the Vibanko ran on free / open source software, built and maintained by the Bitcoin Consultancyvibanko project on GitHub.
==History==
This service was first made public on August 8, 2011Vibanko.com - FREE New Wallet Service by Bitcoin Consultancy. At some point on or before April 17, 2012 the site was discontinued, with funds held available for withdrawal.
==See Also==
* Bitcoin Consultancy
* List of EWallets
==References==
Vircurex

An exchange allowing trading of P2P digital currencies. 
== Introduction ==
Vircurex opened for trading in October 2011. It focuses on providing sophisticated trading mechanisms (orders, stoporders, options, loans) for Bitcoins and the most popular alt chains.
== Currencies ==
P2P digital currencies supported are:
* Bitcoin
* Namecoin
* Liteoicn
* Devcoin
* Geistgeld
* Solidcoin
* I0coin
* Ixcoin
* Euro
* US Dollar
== Adding / Witdrawing Funds ==
Adding and withdrawal of funds is fully automated. Managing your coins is similar to any other exchange, generate your own address and send your coins, they will be credited to your account after a number of confirmations.
Adding and withdrawing of USD and Euro is via Liberty Reserve. The interface is automated hence your transactions are immediately debited or credited to your accounts.
== Trading ==
Trading features are:
* Buy and Sell orders
* Buy and sell stop-orders
* Options
* Loans
A flexible trading mechanism allows the trading of any possible P2P currency pairs.
== Fees ==
The transaction fees are (at the time of writing this article) 0.5%. 
See the Help page for more info.
== API ==
See the API Details for more info.
== External Links ==
Vircurex
Category:Exchanges
Category:eWallets
Virtex

Virtex was an online cryptocurrency exchange platform. It allowed people from all around the world to safely buy and sell bitcoins and litecoins. 
Since turned out to be a scam; http://siliconangle.com/blog/2015/01/23/millions-stolen-inside-the-elaborate-bitcoin-scams-of-tadas-kasputis-egopay-virtex-com-paymentbase/
==Currency pairs==
Virtex offers trades in these pairs: 
*BTC/USD 
*BTC/EUR 
*LTC/USD 
*LTC/EUR
==Deposit options==
* BTC
* LTC
* EgoPay
* OKPay
* Payza
* Perfect Money
* AstroPay
==Withdraw options==
* BTC
* LTC
* EgoPay
* OKPay
* Payza
* Perfect Money
* AstroPay
==History==
The exchange was opened on July 23, 2014. 
==See Also==
* Buying bitcoins
* Selling bitcoins
==External Links==
* Virtex exchange website
* Virtex blog
* Guide to cryptocurrency trading
==References==
Category:Defunct exchanges
Category:EWallets
Vnbitcoin's Bitcoin Calculator

Vnbitcoin's Bitcoin Mining Calculator is a bitcoin calculator to estimate bitcoin mining profitability and tool to find good return bitcoin miners to buy. Live calculator updates instantly with bitcoin network hashrate and exchange rate. Using hashrate difficulty from the last 4 increments to predict future bitcoin miners performances. 
== See also ==
* Generation Calculator
* Profitability Calculator
* Power Calc
== External links ==
* Vnbitcoin's Bitcoin Mining Calculator
Category:Mining
Category:Websites
Category:Open Source
Category:Calculators
Category:Generation Calculator
Category:Profitability Calculator
Category:Power Calculator
WHMCS-Bitcoin-Payment-Module

A script that adds functionality comparable to a shopping cart interface to WHMCS, a billing solution for online businesses.
This open source software was released May 08, 2011WHMCS Bitcoin Payment Gateway.
Requires a bitcoind rpc server to be running remotely or locally.
==See also==
*NOWPayments' free-of-charge WHMCS plugin allows merchants to accept Bitcoin and 100+ altcoins on their website.
==External Links==
* WHMCS-Bitcoin-Payment-Module project on GitHub
==References==
Category:Shopping Cart Interfaces
WM-Center

WM-Center is one of the leading e-currency exchangers.
==History==
After regulatory actions connected to Liberty Reserve shutdown were taken by the U.S. government, wm-center.com domain was seized (because this exchange service was presented in the exchangers section of Liberty Reserve site). The service continued to work using wm-center.es and wm-center.ru domains for a while.
==See Also==
* Buying bitcoins
* Selling bitcoins
==External Links==
* wm-center.es website
Category:Defunct exchanges
Waiting For Bitcoin

Waiting For Bitcoin is a site that was originally designed to allow restaurant waiters and bartenders to print their own payment cards and easily accept Bitcoin. 
Now, the site facilitates: 
* Buying at buyBT.Co 
* Selling at sellBT.Co 
* Paying Bills at BillByBit.com
The site features various delivery options to suit your specific needs.
==External Links==
* Waiting For Bitcoin Website
==References==
Category:Defunct exchanges
Category:Local
Category:Directories
Category:eWallets