nyuuzyou/wikis huggingface dataset:
Cloud mining

Cloud Mining is the process of mining utilizing a remote datacenter with shared processing power often contracted through a Cloud Mining company. This type of mining allows users to mine Bitcoins without having to manage their own hardware. Since Cloud Mining is provided as a service there is generally some cost, and this can result in lower returns for the miner. 
==Types of Hosting==
Users of hosted Mining equipment can either lease a physical mining server or a Virtual private server and install mining software on the machine. Instead of leasing a dedicated server, some services offer hashing power hosted in data centers for sale denominated in Gigahash/seconds (GH/s). Users either select a desired amount of hashing power and a period for the contract or in some cases can trade their hashing power. 
==Cloud Mining Providers==
Started by CEX.IO as the first cloud mining company in October 2013, cloud mining service is now provided by such companies as CloudHashing, PBmining, Genesis Mining, Cointerra and others.
Cloudhashing

Sells mining contracts in 1 Gigahash units. The service is offered by community member Bitmaniac.
The service is quoted to begin mining in May 2013. They plan to operate BFL Mini-rigs initially due to its low power consumption. Current Hash rate on preorder with BFL is 4.5 Thash.
==External Links==
* Website
* Best Bitcoin Cloud Mining Contract Reviews
==References==
Category:Mining contractors
Category:Mining
Category:Mining contracts
Category:ASIC mining
CoinCard

CoinCard was an exchange where bitcoins were traded for virtual prepaid cards.
The site was first publicly available on Feburary 25, 2011CoinCard - Buying PayPal $ and gift cards with Bitcoin. On April 30, 2011 the exchange's operator stopped cashing out to PayPal after the payment network froze the exchange's PayPal accountCoinPal beta - Buying bitcoins with PayPal. 
The site resumed service on December 20, 2011Reopen announcement.
On September 4, 2012, the operator closed it permanentlyCoinCard - Buying Amazon $ and gift cards with Bitcoin - CLOSED.
The operator of the site previously operated CoinPal for buying bitcoins.
==See Also==
* Selling bitcoins
* Buying bitcoins
==References==
CoinField

Established in 2019, CoinField is a cryptocurrency exchange based in Tallinn, Estonia. The company was acquired on September 24, 2021, marking a pivotal transition in its corporate trajectory when Global Fintech Trading Limited (GFT) took full ownership. Subsequent to the acquisition, Paul Cook and Alex Lightman, distinguished shareholders and directors of GFT, assumed leadership positions within CoinField, overseeing its organizational and strategic operations.
CoinJoinXT

CoinJoinXT is non-custodial privacy technique which is closely related to CoinJoin. It allows for any number of entities to between them create a so-called proposed transaction graph (PTG) which is a list of connected transactions. In the PTG the bitcoins belonging to the entities are sent to and fro in all the transactions, but at the end of the PTG they are all returned to their rightful owners. The system is set up so that the process of the PTG being mined is atomic, so either the entire PTG is confirmed on the blockchain or none of it is, this means none of the participating entities can steal from each other.
The proposed transaction graph has the freedom to be any list of transactions that obfuscate the transaction graph. For best results the PTG would perfectly mimic the natural transaction graph due to normal economic activity in bitcoin, and so an adversary would not know where the PTG started or ended, resulting in a massive privacy gain.
Like CoinJoin, CoinJoinXT is easy to make DOS-resistant and doesn't require a prohibitive number of interaction steps. Unlike CoinSwap there is no liveness or non-censorship requirement so funds are secure even if bitcoin is under temporary censorship. However CoinJoinXT uses a lot of block space compared the privacy gain. And CoinJoinXT requires a malleability fix so all the transactions in the PTG have to be segwit-only. As of 2019 only around 40% of transactions are segwit, so an observer of the blockchain could easily eliminate non-PTG transactions by checking whether they are legacy or segwit.
== External links ==
See these links for detailed explanations of how the CoinJoinXT protocol works.
* https://joinmarket.me/blog/blog/coinjoinxt/
* https://diyhpl.us/wiki/transcripts/building-on-bitcoin/2018/coinjoinxt/
* https://www.ccn.com/coinjoinxt-using-the-lightning-network-to-hide-bitcoin-transactions-in-plain-sight
* https://www.reddit.com/r/Bitcoin/comments/8wkwfv/coinjoinxt_using_the_lightning_network_to_hide/
* https://github.com/AdamISZ/CoinJoinXT-POC
Category:Privacy
CoinMKT

CoinMKT is a US-based currency exchange which supports USD for trading Bitcoins.
CoinMKT is currently in public beta with real money trading, visit http://coinmkt.com
==Features==
===Cross Platform===
CoinMKT's HTML5 web app can be used on any device with any screen size.
===Cold Storage===
CoinMKT keeps 90% of deposits in cold storage (offline) to prevent mass theft.
===Trade Any Currency Pair===
CoinMKT allows the inter-trading of any currency pair from the currencies it supports.
===Currency pairs===
* BTC => / USD / LTC / PPC / TRC / NVC / NMC / FTC
* LTC => / USD / BTC / PPC / TRC / NVC / NMC / FTC
* PPC => / USD / BTC / LTC / TRC / NVC / NMC / FTC
* TRC => / USD / BTC / LTC / PPC / NVC / NMC / FTC
* NVC => / USD / BTC / LTC / PPC / TRC / NMC / FTC
* NMC => / USD / BTC / LTC / PPC / TRC / NVC / FTC
* FTC => / USD / BTC / LTC / PPC / TRC / NVC / NMC
===Deposit Options===
====Cryptocurrencies====
CoinMKT does not charge a deposit fee for any supported Digital_currency including Bitcoins, Litecoins, PPCoins, TerraCoins, NovaCoins, NameCoins, or FeatherCoins
====USD====
* Bank Account (ACH / eCheck) - coming soon
* International Wire Transfer
* Money Order
====EUR====
(coming soon)
* SEPA bank transfer (fee applies)
===Withdraw Options===
====Cryptocurrencies====
* BTC
* LTC
* PPC
* TRC
* NVC
* NMC
* FTC
====USD====
* Dwolla
* Bank Account (ACH / eCheck)
* Wire Transfer
* Mailed Check
====EUR====
(coming soon)
* SEPA bank transfer (fee applies)
==History==
On April 13rd 2013, the CoinMKT.com domain was registered.
On May 1st 2013, CoinMKT launched its website Official Website .
==See Also==
* Buying bitcoins
* Selling bitcoins
* Bitcoin
* Namecoin
==External Links==
* Official Website: CoinMKT Cryptocurrency Trading Platform
* Facebook Page 
* Twitter Handle
==References==
Category:Defunct exchanges
Category:EWallets
CoinMx

The Association was established in early 2013, with seven members and by October of 2013 has grown because of the digital money craze. Prior to adding our digital money exchange for our members, our association only had 200 members. From July 2013 until October 2014 our membership grew to 70,000 members.
The Coin.Mx site was developed by a group of our association members. They created the exchange so they could freely transact with one another without being scammed from outside sources. 
Coin.Mx allows you to buy bitcoin with cash, credit card, bank transfers, Domestic & International wires and free ACH withdrawls.
CoinPal

CoinPal was an exchange that accepted PayPal for relatively small order sizes and a weekly limit on purchases. 
The site was first publicly available on December 31, 2010CoinPal beta - Buying bitcoins with PayPal. On January 14th, 2010 CoinPal introduced an API that allows merchants and others seeking payment to use the service to accept micro-paymentsRe: CoinPal beta - Buying bitcoins with PayPal. The operator of the site also operates CoinCard for selling bitcoins.
On April 30th PayPal froze the exchange operator's PayPal account and the exchange announced that service had endedCoinPal beta - Buying bitcoins with PayPal.
==Weekly Limits==
There was a limit on the number of bitcoins each customer can buy each week. This limit depends on the amount of time that has passed since the customer's first order.
Minimum days since customer's first order	Weekly limit
0 	20
3 	40
7 	60
14 	100
45 	160
Those trading on Bitcoin OTC can increase their weekly purchase limits by connecting CoinPal to the OTC web of trustAuthenticate with a PGP Key.
==See Also==
* Buying bitcoins
* Selling bitcoins
* So long, CoinPal, and thanks for all the bitcoins!
==External Links==
* CoinPal.ndrix.com web site
==References==
CoinPig

CoinPig - Bitcoin wallet with integrated savings system. It allows to send and receive bitcoins just like any other wallet. The main difference between Coinpig and other wallets is an integrated savings system. People receive extra bitcoins for keeping them on Coinpig. 
Secure
Maximum security with minimal risk to accidental loss. Pin protection!
Free
For individuals: Secure your bitcoin holdings for free by using CoinPig.
For businesses: Build Your Business. Secure your corporate holdings by using CoinPig.
Simple
Get started in seconds and access your wallet from any device.
=Features=
* You receive 1% for each transaction 
* Extra percentage every month. Monthly percent depends on your balance.
* Secure
* Profitably
* PIN protection
* Simple
* Viewing Transaction History
and many others
==Savings Plan==
* 0 USD - 100 USD - 3% monthly 
* 100 USD - 500 USD - 4% monthly 
* 500 USD - 1000 USD - 5% monthly 
* 1000 USD - 2000 USD - 6% monthly 
* 2000 USD - 6000 USD - 7% monthly 
* 6000 USD - 8000 USD - 8% monthly 
* 8000 USD - 10000 USD - 9% monthly 
* 1000 USD + - 10% monthly
CoinReform

== About the company ==
CoinReform is a small company that allows you to exchange crypto currency vise versa.
We don't have the office, accountant and we actually don't pay taxes.
That's why our rate is the finest on the market.
CoinReform presents automated exchange system - one withdrawal address - one deposit address.
== History == 
CoinReform.com was founded in 2016. It’s a young and highly demanded service for quick cryptocurrency exchange. 
==API==
API is public. Documentation available on https://www.coinreform.com/faq/api
==FAQ==
More information available on our special page - FAQ - https://www.coinreform.com/faq
==Fees and rates==
CoinReform does not take any fee for the exchange.
Our rates are available on https://www.coinreform.com/fees-limits page, they are dynamic and depends on market.
==References==
Category:Exchanges
CoinTerra

CoinTerra™ designs and produces best-in-class Bitcoin mining ASIC processors and systems. Our state-of-the-art design methodologies and advanced architectures enable us to deliver Bitcoin mining solutions with the highest performance ASICs for the lowest power and die area. We are proud to lead the retail bitcoin mining market with our new GoldStrike™ I ASIC and our 2TH/s TerraMiner™ IV Bitcoin miner rigs – both representing the highest performance Bitcoin miner hardware that are currently announced.
== Chapter 7 Bankruptcy ==
On Jan 24, 2015, CoinTerra filed a petition for chapter 7 bankruptcy protection in the United States Bankruptcy Court for the Western District of Texas Austin Division (Case #: 1:15-bk-10109). Further information can be found at the Court's website. http://www.txwb.uscourts.gov/node/19 http://cointerra.com/wp-content/uploads/2015/01/CoinTerraBG71.png
== References ==
* Cloud Mining Contract Reviews
CoinTouch

CoinTouch is a London-based decentralised Bitcoin exchange. The service finds connections on Facebook and/or Google+ who trade cryptocurrency. By allowing direct trading between users, CoinTouch helps avoid the risk of storing cash or bitcoins with a centralised exchange. CoinTouch does not charge fees, and registration is a simple, one-click process.
==History==
CoinTouch launched on January 29, 2014 for bitcoin trading. 
On March 12, 2014, CoinTouch added support for a number of altcoins. 
==References==
==External links==
* CoinTouch - Find friends of friends that trade crypto currency
* CrunchBase Profile
Category:Local
Category:Directories
Category:Exchanges
CoinTumblr

Accepted your payment, deducts a small commission and then forwarded the balance on to a Bitcoin address that you designate. It was a laundering service of sorts.
This service might no longer be functioning. See history, below.
Access to the site is available using only its Onion address through Tor.
==History==
From around March 12th until about March 17th, 2011, the site experienced a service disruption for several days before the operator noticed and subsequently made repairsCoinTumblr - any experience?. Additional service issues were reported in April, 2011Re: CoinTumblr - any experience?.
Its mention on the forum first appeared on February 12th, 2011Re: Can I be taxed?.
On April 29th, 2011 entries for CoinTumblr were removed after service issues remained unresolved with no communicationsRe: CoinTumblr - any experience? broken again.
==See Also==
* Anonymity
* Bitcoin Laundry
* RFC: Bitcoin MixNet
==References==
Coin Loft

An Australian based fixed-price exchange where bitcoins can be bought using over the counter cash deposit in Australian Dollars. This site aims to provide the easiest and fastest way to buy bitcoin in Australia.
==History==
Coin Loft has been active since January 2014.
==See Also==
* Selling bitcoins
* Buying bitcoins
==External Links==
* coinloft.com.au website
==References==
Category:Exchanges
Coinabul

== Bitcoin, Gold, and Silver ==
Coinabul sells gold and silver for Bitcoin. Coinabul opened its doors on October 10th, 2011. Since then Coinabul has been heavily involved in the Bitcoin community. Coinabul has given away free posters, held Bitcoin-wide community events, and even held the occasional giveaway.
== Services offered ==
==== Gold purchasing ====
Coinabul offers many different kinds of gold bars and coins. 
Popular choices include: 
* Credit Suisse One Ounce Gold Bar
* Austrian Philharmonic One Ounce Gold Coin
* Pamp Suisse One Ounce Gold Bar
==== Silver purchasing ====
Coinabul offers many different kinds of silver bars and coins. 
* Canadian Silver Maple One Ounce Silver Coin
* Austrian Silver Philharmonic One Ounce Silver Coin
* U.S. Silver Eagle One Ounce Silver Coin
==== Gold/Silver API Access ====
Use Coinabul's API to program automated trading bots! More info here: http://coinabul.com/index.php/api-documentation/
== About Coinabul ==
Coinabul was founded inside the United States and is dedicated to transparency and safety. Incorporated in Wyoming, with distribution centers in California, Coinabul ships both nationally, and internationally!
Coinabul reported 1.5 Million dollars in revenue in its first operating year.
== Press Hits ==
NOV 9, 2012 http://www.theregister.co.uk/2012/11/09/bitcoin_friday_sale_event/
NOV 9, 2012 http://www.xakep.ru/post/59606/
NOV 5, 2012 http://www.finextra.com/news/fullstory.aspx?newsitemid=24247
OCT 30, 2012 http://www.tyinternety.cz/novinky/obchodnici-prijimajici-bitcoin-planuji-velky-slevovy-patek1-8018
OCT 29, 2012 http://thenextweb.com/insider/2012/10/30/bitcoin-merchants-working-to-attract-adoption-with-their-own-black-friday/
OCT 29, 2012 http://www.americanbanker.com/issues/177_209/bitcoin-merchants-plan-own-version-of-black-friday-1053951-1.html
OCT 17, 2012 http://www.dgcmagazine.com/coinabul-a-bitcoin-to-gold-marketplace/
OCT 16, 2012 http://bitcoinmagazine.net/coinabul-celebrates-one-year-in-business/
OCT 10, 2012 http://codinginmysleep.com/coinabul-announces-anniversary-sale/
SEP 28, 2012 http://codinginmysleep.com/interview-with-jay-shore-of-coinabul/
APR 28, 2012 http://bitcoinmagazine.net/coinabul-celebrates-six-months-of-gold/
DEC 23, 2011 http://www.thebitcointrader.com/2011/12/interview-jay-from-coinabul.html
==See Also==
* Bitcoin Ladder
==External links==
* Coinabul.com
* @Coinabul on Twitter
* Coinabul Blog
* Coinabul on Facebook
* Coinabul on Google+
* Coinabul on Reddit
* Coinabul on YouTube
*
Coinb.in

Coinb.in is a free and open source project released under the MIT license, originally by OutCast3k in 2013. 
Github: https://github.com/OutCast3k/coinbin/
TOR: 4zpinp6gdkjfplhk.onion
==Features==
* Offline Compressed & uncompressed Address creation.
* Offline Multisignature Address creation.
* HD (BIP-32) support
* "In browser" Key (re)generation.
* Send and receive payments.
* Ability to decode transactions, redeem scripts and more offline.
* Build custom transactions offline.
* Sign transactions offline.
* Signatures are deterministic as per RFC 6979 (https://tools.ietf.org/html/rfc6979#section-3.2)
* Broadcast transactions.
* nLockTime support.
* Add custom data to transactions with the use of OP_RETURN.
* Support current DarkWallet Stealth Address structure (as of version Alpha 7) for outputs.
* Brain wallet support.
* Compatible with bitcoin-qt
* An offical .onion address for tor users.
* Offline qrcode creator and scanning tool
* Fee calculator
* Segwit and Bech32 support
==Privacy==
Coinb.in believes strongly in privacy, not only does it support the use of TOR, the site also does not collect and store IP or transaction data via their servers.
==External links==
* Coinb.in website
* How To Create A Bitcoin Multisig Wallet
Category:eWallets
Category:Wallets
Category:Services
Category:Shopping_Cart_Interfaces
Coinbase

:For the business, see Coinbase (business).
The coinbase is the content of the 'input' of a generation transaction. While regular transactions use the 'inputs' section to refer to their parent transaction outputs, a generation transaction has no parent, and creates new coins from nothing. 
The coinbase can contain any arbitrary data. The genesis block famously contains the dated title of a newspaper article in The Times:
 The Times 03/Jan/2009 Chancellor on brink of second bailout for banks
Coinbaser

Beginning with bitcoind 0.6 (not yet released), you will be able to control the creation of coinbase content in blocks you mine.
This is split into two parts:
== Coinbaser ==
The coinbaser is an external program which tells bitcoind how to distribute generated funds;
it is called whenever bitcoind wants to build a new coinbase transaction.
=== Usage (bitcoind 0.6+) ===
To setup a coinbaser, you need to pass a command to bitcoind using the -coinbaser option.
This command will be executed by your system's default shell.
If the string '%d' is present in the command line, it will be replaced with the total amount of funds available for distribution (in satoshis).
For example:
 bitcoind -coinbaser='/home/user/coinbaser.pl %d'
You can also have bitcoind connect to a TCP socket. In this case, the socket will be sent "total: " followed by the funds available and two newlines. For example:
 bitcoind -coinbaser='tcp:localhost:8334'
=== Output format ===
The coinbaser has a simple line-based format for standard output.
The first line should contain the number of additional destinations for generated funds.
For each destination, there should be two lines:
first, the amount of funds to redirect (in satoshis);
second, the bitcoin address to direct them to.
If there is any error in this format, a reason will be logged to debug.log and bitcoind will abort customization and revert to its default behaviour of taking the full reward+fees for itself.
Note that distributing all the available funds is undefined behaviour;
remaining funds are generated to the original destination, and treated in the usual way.
This can, however, safely be as low as 1 satoshi left not redirected.
== setworkaux ==
setworkaux is a new JSON-RPC call to add arbitrary data to your coinbase transaction's "scriptSig".
Once added, it will be put in all new work (see getwork) until explicitly replaced or removed.
The first parameter is required, and must be an arbitrary identifier for the data chunk.
The second parameter is optional; if present, it must be a hexadecimal-encoded string of the data to be added (or replace older data under the same id).
If the second parameter is not provided, it will remove the id from future work.
There is a limit of 100 octets total in the coinbase;
setworkaux will fail if you try to add more than it can safely insert.
Coindesk

#REDIRECT CoinDesk
A global news resource on Bitcoin and digital currencies. 
This London-based resource and news operation aims to be the “Reuters of Bitcoin” according to its founder Shakil Khan. As an angel investor in Spotify and bitcoin startup BitPay, Khan noticed a gap in the news coverage for bitcoin and digital currencies in general when other entrepreneurs constantly questioned him about bitcoin. CoinDesk was launched on May 1st 2013[1]. In September 2013, Jon Matonis, executive director of the Bitcoin Foundation joined CoinDesk as a contributing editor. 
==CoinDesk Information Centre==
On August 21st 2013[3], CoinDesk launched a bitcoin information centre. This contained guides on everything from the very basics of digital currency to how to set up your own bitcoin mining rig.
==CoinDesk Bitcoin Price Index==
CoinDesk launched a proprietary Bitcoin Price Index on September 11, 2013[2]. The Bitcoin Price Index (BPI) represents an average of bitcoin prices across leading global exchanges that meet criteria specifed by the BPI. It is intended to serve as a standard retail price reference for industry participants and accounting professionals.
Criteria for inclusion in the BPI are:
# Exchange must serve an international customer base;
# Exchange must provide a bid-offer spread for an immediate sale (offer) and an immediate purchase (bid);
# Minimum trade size must be less than 1,500 USD or equivalent;
# Daily trading volume must meet minimum acceptable levels as determined by CoinDesk;
# Banking transfers in or out of the exchange must be completed within seven business days.
Upon launch, BitStamp, BTC-e and CampBX met these criteria and were included in the index. 
The main features of the index are as follows:
* The CoinDesk BPI is a simple average of leading XBT/USD exchange prices;
* The BPI is expressed as the midpoint of bid/ask spread;
* The BPI is updated every 60 seconds;
* If an exchange does not update its price for more than 30 minutes, it is omitted from the live BPI calculation until it is updated again;
* New index historical data commences on 1 July 2013;
* Prior index historical data is obtained via Mt. Gox;
* End-of-day high, low, and closing BPI is based on Greenwich Mean Time (GMT) or British Summer Time (BST) when appropriate;
* Non-USD BPI prices are implied based on rates obtained via openexchangerates.org;
The CoinDesk BPI is now used by the Bitcoin Foundation[4], Bitcoin Insider and several charting platforms. A free API is available for developers. 
==External Links==
* CoinDesk.com website
* @CoinDesk Twitter
* RSS Feed 
* LinkedIn 
==References==
* TechCrunch - Shakil Khan launches CoinDesk a bitcoin resource
* The Next Web - Baffled by the world of Bitcoin? This beginner’s guide will tell you everything you need to know
* AllThingsD - What’s a Bitcoin Really Worth? CoinDesk Thinks It Has the Answer
* CoinDesk launches proprietary bitcoin price index
Category:Blogs
Coinffeine

Coinffeine was a company that created the first P2P distributed Bitcoin-fiat exchange. The desktop software was based on a BitTorrent model with a double escrow system and the use of micropayment channels to prevent fraud and allow large transactions to be safely executed in small increments.
The Coinffeine open beta was launched on July 1st 2015. Coinffeine version 0.12 was released in August 2015 added support for over 20 currencies.
The software allowed users to control their own bitcoins in the Coinffeine desktop wallet, avoiding any exchange-related risk. Fiat money was held in third party payment processors and connected to the exchange through the payment processor's APIs.
Coinify

Coinify is the only reputable payment processor with native support for most countries. 
==Customers Pay in Bitcoin – You Receive Euros, Dollars, Kroner and More==
Accept bitcoin payments risk-free with Coinify. Unlike most credit card payment services, you do not need to wait until the end of the month to get paid. No need to worry about chargebacks or fraud when accepting bitcoin payments either.
==See Also==
* Bitcoin Ladder
==External Links==
* Coinify web site
==References==
Bitcoin Developers
Category:Shopping Cart Interfaces
Category:ECommerce