nyuuzyou/wikis huggingface dataset:
Hash Market

A market for renting "Hash Power". It buys and/or sells hash power normally used for bitcoin mining.
The price of hash power is often more than its "worth in bitcoin" (= the amount of bitcoin it is expected to generate).
One example of such a marketplace was GPUMAX, ran by Pirateat40.
Hash markets can be used to obtain large amounts of hash power, in order to perform various attacks that require high hash rate against some alt-chains (or theoretically bitcoin itself).
Hash Time Locked Contracts

A Hash Time Locked Contract or HTLC is a class of payments that use hashlocks and timelocks to require that the receiver of a payment either acknowledge receiving the payment prior to a deadline by generating cryptographic proof of payment or forfeit the ability to claim the payment, returning it to the payer.
The cryptographic proof of payment the receiver generates can then be used to trigger other actions in other payments, making HTLCs a powerful technique for producing
conditional payments in Bitcoin.
== HTLCs in cross-chain atomic swaps ==
Atomic cross-chain trading allows some amount of one cryptocurrency (such as bitcoin on mainnet) to be traded for some amount of cryptocurrency on another block chain (such as bitcoin on a sidechain).
Descriptions of cross-chain atomic swaps are probably the origin of the technique now called HTLCs.
== HTLCs in payment channels ==
Payment channels already use timelocks, and it can be relatively simple conceptually to extend them with hashlocks. This provides the useful benefit of making payments routable across two or more payment channels, as done in the Lightning Network .
=== Example ===
# Alice opens a payment channel to Bob, and Bob opens a payment channel to Charlie. 
# Alice wants to buy something from Charlie for 1,000 satoshis.
# Charlie generates a random number and generates its SHA256 hash. Charlie gives that hash to Alice.
# Alice uses her payment channel to Bob to pay him 1,000 satoshis, but she adds the hash Charlie gave her to the payment along with an extra condition: in order for Bob to claim the payment, he has to provide the data which was used to produce that hash.
# Bob uses his payment channel to Charlie to pay Charlie 1,000 satoshis, and Bob adds a copy of the same condition that Alice put on the payment she gave Bob.
# Charlie has the original data that was used to produce the hash (called a pre-image), so Charlie can use it to finalize his payment and fully receive the payment from Bob. By doing so, Charlie necessarily makes the pre-image available to Bob.
# Bob uses the pre-image to finalize his payment from Alice
== References ==
Lightning Networks Part II: Hashed Timelock Contracts (HTLCs)
Hashed Timelock Contract (HTLC) in the Lightning Network paper
Category:Technical
Hash per second

Hash per second is an SI derived unit representing the number of double SHA-256 computations performed in one second, referred to as hash rate. It is usually symbolized as h/s (with an appropriate SI prefix).
== Use in hardware specifications ==
The hash rate is the primary measure of a Bitcoin miner's performance. In 2014, a miner's performance was generally measured in Ghash/s, or billions of hashes per second.
The hash/s unit is also part of a common measure of a Bitcoin miner's electric efficiency in the term watts/Ghash/s, denoted as W/Ghash/s. As 1 watt is equal to 1 joule/s, this measure can also be expressed as J/Ghash, or joules per 1 billion hashes.
== Bitcoin network hash rate ==
The hash/s is also used in calculations of the Bitcoin network's overall hash rate. Because each miner or mining pool only relays a solved block to the network, the overall hash rate of the network is calculated based on the time between blocks. While not an accurate measure of network hash rate at any given instance in time, measurements over longer periods can be considered indicative and similar calculations are used in Bitcoin's difficulty adjustment.
In January 2015, the network hash rate was around 300 Phash/s, or 300 quadrillion hashes per second.https://blockchain.info/charts/hash-rate In April 2021 it was about 170000 Phash/shttp://bitcoin.sipa.be/
== References ==
Hashop.IO

== Hashop.IO ==
Hashop.IO is one of the leading Cloud Mining platforms that allows users to earn Bitcoins through collective mining. The users receive rewards right after purchasing cloud-based mining powers. There are four pricing options available — 20GH/s, 50GH/s, 100GH/s and 200GH/s. There are Special Offers available for those who want to purchase 500GH/s and more.
Type 	Cloud Mining Platform
Founded 	30 October 2013
Register Locaion	Tenancy 10, Marina House, Eden Island, Mahe, Seychelles
Website 	Hashop.IO
=== Overview ===
The website allows the users to calculate their profit depending on what mining plan they choose. Hashop.io guarantees daily payouts and no additional fees except the maintenance fee. The user is required to make a one-time payment that implies a 2-year contract. The company accepts credit cards, wire transfer and Bitcoin payments via Bitpay, BIPS and Coinbase. Hashop.io has an on-going discount system. In addition according to the company’s promotional scheme, the users can receive a higher reward if they choose to receive the reward 20 days after mining. Hashop.io provides 24/7 customer support to handle various issues. 
=== Pricing options ===
Hashop.IO gives its users a possibility to select from four different pricing plans with various discounts — 5 Ghash/s for $69 instead of $139, 10 Ghash/s for $136 instead of $269, 20 Ghash/s for $269 instead of $529 and 50 Ghash/s for $649 instead of $1450. Cloud miners are given the possibility to calculate their profit from different mining schemes. All of the plans imply daily payouts, low power cost, and professional technical support. The users signs a two-year contract that can be renewed after it expires. The user has to simply make a one-time payment for the selected plan. There are numerous payment methods available, for example, payments via digital wallets, credit cards and wireless transfers.
=== Fees ===
Hashop.IO charges a maintenance electricity fee of $ 0.00045 per every hour of mining for every Giga hash. The fee must be paid before the user can start mining. The miner can ask for a refund within the first 7 days after payment. The refund will be made through the same payment method used by the miner. After 7 days Hashop.io gives the miner the opportunity of instantly converting GH/s to Bitcoins. The conversion price is calculated according to the market value of miner’s GH/s minus 15% fee.
=== Affiliate Program ===
Hashop.IO offers everyone to participate in the Affiliate Program, which gives you 10% discount of the plan cost, purchased by each referred client (payment in $). This offer works both for our recent customers and those who hasn't purchased anything on Hashop.IO yet.
Category:Mining
Heaven Sent Gaming

Heaven Sent Gaming is a publisher of their own original productions, they have released content across multiple media formats. Founded in 2006 by, now married, high school sweethearts Mario J. Lucero and Isabel Ruiz Lucero.
Both founders of Heaven Sent Gaming are advocates of decentralization and one of the cofounders, Mario, is a Bitcoin evangelist. They have been supporters of the Bitcoin community since 2009, and have been accepting Bitcoin donations since then.
== Publishments ==
===Comics===
All the comics from Heaven Sent Gaming are created by both Mario and Isabel, with art by Isabel. Their first comic series, Reverie was first released in 2010; followed by TWD: before Destruction and Karis in 2011, both of which were initially created in 2004.
*BladeChick, a super-heroine action comic that has a Dr. Jekyll and Mr. Hyde type split-personality heroine.
*Karis, a couple of college going angels, Karis and Ari.
*Koki'o Shade and Monkey, a samurai and ninja series starring Barack Obama and George W. Bush.
*Mouton, a super-hero action comic with a fat/heavily-muscled hero.
*Reverie, a slice-of-life comic strip that's a in the same vein as Peanuts (Charlie Brown/Snoopy).
*Thad's World Destruction: Before Destruction, a life-exaggerated Original English Language manga, about five chosen children named Byron, Kevin, Mario, Isabel, and Art.
===Games===
Their first publication was in 2007, a game called Balance for PC.
*Balance, a puzzle game released during their college projects with "Our Own Little Coup".
===Music===
*All We Are by Life Never Lost, a demo album by a Christian band.
*Mario J. Lucero's country and rock music.
===Novels===
*Craft, a fantasy-adventure story.
*digitalDomain, a sci-fi adventure story.
*Iron, a western with an interdemensional travelling cowboy.
*Many: The Blog of a Space Probe, a science-fiction slice-of-live travel-log of a futuristic space-probe.
===Video===
*HSGplays, a let's play video series.
*Mario's vlog, a vlogging video series.
===Web===
*aywv, a gaming news publication, first launched in 2009. Amassed multi-million views within its first year of publication.
*BitcoinDonate, defunct, was a pseudo-game that recommended a random Bitcoin address, for charities like the Red Cross and Salvation Army. It raised over a thousand US Dollars worth of Bitcoin for various charities.
*New Mexico Cultural Encyclopedia, Lexicon, and News, which covers the culture of the State of New Mexico in the United States.
== Links ==
* heavensentgaming.com
* Donation page
Category:Websites
HelloBitcoin

Formerly, a exchange that allowed trade between bitcoins and USD (U.S. dollar).
==History==
The exchange was first available for beta testing on July 11, 2011HelloBitcoin.com: New exchange looking for beta testers and then opened registration to all in August, 2011.
The service was only lightly used and evenutually shuttered.
==See Also==
* Buying bitcoins
* Selling bitcoins
==References==
Helping Bitcoin

The question is: how does one 'help' Bitcoin if it is an online currency that is not managed by any one individual? Often, those who take an interest in Bitcoin are at a loss as to how they can provide their support for this community. This article aims to offer some direction.
==Join the Bitcoin Community==
Find a community that you would naturally be a part of that accepts and supports Bitcoin, be it your workplace, schools, neighborhood, or online. The Bitcoin community is made up simply of the many supporters of the currency from all over the world. Spread the word—inform others wherever and whenever you can.
==Be Creative==
Everyone possesses their own unique talents and abilities; these qualities are what make us the people we are and bring us together. Utilize your skills and creativity to assist.
* Hack the Bitcoin source. This may prove useful to those familiar with coding.
* Mine. If you're into high-efficiency computing, creating a strong miner will definitely get you going.
* If you own a business, accept Bitcoin for your services. You may also wish to encourage other businesses to follow in your footsteps. 
* Speculate in Bitcoin. This improves its liquidity and helps every other person using Bitcoin to carry out real transactions.
Every task and part that people take on adds stability and flexibility to the Bitcoin economy.
==Third: Be Wise==
Everyone has limited resources, and not all people think in the same way that you do. Trust no one, research, and expect the unexpected.
Hidden Service

Tor can also provide anonymity to websites and other servers. Servers configured to receive inbound connections only through Tor are called hidden services. Rather than utilizing a server's IP address (and thus its network location,) a hidden service is accessed through its .onion address. The Tor network understands these addresses and can route data to and from hidden services, even to those hosted behind firewall or network address translators (NAT), while preserving the anonymity of both parties. Tor is necessary to access hidden services.
Hidden services have been deployed on the Tor network since 2004. Other than the database that stores the hidden-service descriptors, Tor is decentralized by design; there is no direct readable list of all hidden services, although a number of hidden services catalog publicly known onion addresses.
Because hidden services do not use exit nodes, connection to a hidden service is encrypted end-to-end and not subject to eavesdropping. Contrary to popular opinion, this makes an additional traditional TLS layer atop a hidden service not only redundant, but also pointless. There are, however, security issues involving Tor hidden services. For example, services that are reachable through Tor hidden services and the public Internet, are susceptible to correlation attacks and thus not perfectly hidden. Other pitfalls include misconfigured services (e.g. identifying information included by default in web server error responses), uptime and downtime statistics, intersection attacks, and user error.
Hidden services can help users store and transact bitcoin with relative privacy and safety.
== See also ==
* Tor
* Setting_up_a_Tor_hidden_service
Higher difficulty pooled mining

Higher difficulty pooled mining refers to using targets greater than difficulty 1 for pool shares. With the advent of ASIC mining, many hashrates may be sufficiently high that difficulty 1 creates too much traffic for share submissions, and is expected to become necessary in the near future.
== Concept ==
With rapidly-increasing hashing speeds, miners are rather wasteful in terms of bandwidth. Each share requires submission to the server, which must handle shares from all miners. This can be overloading, and is suboptimal.
Higher difficulty pooled mining saves bandwidth and does not affect the expected return; however, volatility is increased. For powerful miners, volatility should be low even with a higher difficulty, and the bandwidth savings can pay off.
Pools can allow miners to request their own difficulty level using the "target" key specified in BIP 23's basic pool extensions. No pool or pool software supports this extension yet; however, Eloipool (maintained by the Eligius pool) plans to offer this functionality in the near future.
== Technical details ==
Communication can be done, as with classical pools, with the getwork protocol (though some mining software implements this improperly).
However, the getwork protocol itself cannot scale to faster hashrates.
To take full advantage of faster miners, BIP 22 and BIP 23 are needed.
== History ==
The first Bitcoin pool to use higher difficulty pooled mining was BitPenny, which uses a fixed difficulty of 8.
== Support ==
=== Pools ===
:Main article: Comparison of mining pools
Only a few pools make use of higher difficulties at this time.
=== Software ===
:Main article: Getwork support
Category:Mining
Hive

Hive is a lightweight "thin client" Bitcoin wallet for mac OS X, iOS, Android and Web. It is primarily based on bitcoinj focusing on ease-of-use. The wallet is currently officially unsupported (see History).
==Features==
* An attractive, people-oriented interface.
* Free and open - source.
* An integrated application platform.How to make a Hive app
* An SPV backend for fast startup.
* Tor support for enhanced anonymity.
* Support for many languages.Transifex translation project
* Automatic updates
* Payment Protocol support
* Waggle feature based on geolocation service 
* Multi-token support 
Other features for the different platforms currently in development can be found in the GitHub wiki account. Github
==History==
Hive alpha version for mac OS X was released on September 28, 2013 and promoted with a booth at the European Bitcoin convention.Hive launch thread Months after, Hive has acquired Bridgewalker, "a Euro-based platform for Bitcoin designed with speed in mind".Bridgewalker
By February 3, 2014, the mac OS X wallet has come out of beta testing and was available to public through download on its website. Hive OS X out of beta testing After a few months, Hive Android was launched for Beta testing. Hive Android for beta testing Hive Web was officially launched during the Inside Bitcoins Conference HK last June 24-25, 2014. Hive Web Wallet Bitcoin Adoption Roadblocks Hive universal iOS wallet was also recently launched last August 13 and is available in the App store.
On September 20, 2015, it was announced by Hive Wallet Founder, Wendell Davis, that the wallet is officially unsupported and he recommends to use something else, until new maintainers are found.https://twitter.com/hivewallet/status/645402186260721664http://cointelegraph.com/news/115305/hive-wallet-is-officially-unsupported He claims that the wallet actually does work fine and the servers will kept online for anyone who needs them.https://www.reddit.com/r/Bitcoin/comments/3lmi9m/hives_status_officially_unsupported/
==See Also==
* Thin Client Security
==External Links==
* How To Create a Hive Bitcoin Wallet
* Hive project website
* GitHub repo
* Hive Official Twitter account
* Hive Official Facebook account
* Hive Official Skype public chat
==References==
 
Category:Clients
Category:Wallets
Category:EWallets
Category:HybridEWallets
Category:Frontends
Category:Open Source
Category:Mac OS X
Category:Android
Category:iOS
Hodl Hodl

Hodl Hodl is a P2P cryptocurrency exchange that allows users to trade directly with each other and it doesn't hold user’s funds — locking it in multisig escrow instead. This minimizes the possibility of crypto assets theft and reduces trading time.
Because Hodl Hodl does not hold any money (neither cryptocurrency, nor fiat) it is not subject to complex compliance procedures. All trades happen directly between users' cryptocurrency wallets. How Hodl Hodl Is Building a Real Business With Bitcoin Smart Contracts
==How does Hodl Hodl work?==
Hodl Hodl Riga will host “Baltic Honeybadger” bitcoin conference is a global P2P cryptocurrency exchange, where all trades occur directly between buyers and sellers, and without a middleman involved. Each time a contract is created between two parties, Hodl Hodl exchange generates a multisig escrow cryptocurrency address. The seller sends cryptocurrency from his wallet to this account, and when the cryptocurrency is locked in escrow, the buyer sends fiat to the seller. The seller then releases the locked cryptocurrency from escrow using his payment password, and the buyer receives them into his wallet.
==How secure is trading on Hodl Hodl?==
The main priority of Hodl Hodl exchange is keeping your funds and details safe. In order to start trading on our exchange, you only need to provide a valid e-mail address and to create a password. During a trade, the funds are locked in multisig escrow, and if you are the seller, you hold one of the keys (your payment password you create before locking in the funds), even if something happens to the exchange, your cryptocurrency will remain unaffected. Hodl Hodl: It’s Not Bitcoin’s Job to Make You Rich
In order to release the funds, two keys are needed - one belongs to the seller (in any type of contract), one belongs to the buyer (if the contract type is 2-out-of-3) and the other one is Hodl Hodl's key (in any type of contract). A buyer cannot receive the cryptocurrency unless both the exchange and the seller sign the transaction (unless the type of contract is 2-out-of-3 and buyer wins a dispute). This arrangement ensures that both seller and buyer are protected from potential scamming. A seller is unable to return his cryptocurrency to himself unless the exchange signs the refund transaction (which requires the contract to be canceled, or in the case of a dispute, an explicit decision in his favor from a support manager).HodlHodl cryptocurrency exchange will launch its own OTC desk
==Why should I use Hodl Hodl?==
Here are a few of our advantages:
* Safety – we don't hold users' funds as other exchanges do.
* No KYC/AML – because, again, we don't hold users' funds.
* Speed – because we don't hold user funds – all trades happen directly between users wallets.
* Before you trade real cryptocurrency, feel free to learn using our TESTNET.
* Truly global trades!
==External Links==
* Hodl Hodl exchange
* Hodl Hodl exchange TESTNET version
* Twitter
* Blog
* Telegram
==See also==
* Bech32 adoption
* List of Exchanges
==References==
de: Hodl Hodl
HolyTransaction

HolyTransaction is your universal multi-currency wallet. It offers a simple and instant exchange among cryptocurrencies. It's designed for nontechnical users. Mobile wallet client is available on any device with HTML5 support.
== Headquarter and Offices ==
HolyTransaction is operated by HolyTransaction SA, which is a corporate entity registered in Luxembourg, with its headquarters in Luxembourg City.
==Digital Currency Exchange==
HolyTransaction is a multi-currency online wallet with simple and instant conversion between supported currencies - exchange between all popular currencies with a couple of clicks. Instantly send from one currency to another: you can send payments in one digital currency, and receive in another. 
==Send Bitcoin to anyone!==
Send cryptocurrencies to a friend through Facebook, LinkedIn, Twitter, or email. You can send bitcoins to anyone, anywhere. If they don’t have a wallet, they will receive a notification with a link to redeem the funds.
==Simple to use==
With a simple, no-hassles gui. Anyone can use cryptocurrencies.
==Cutting Edge Security==
We follow the best industry practices and guarantee that your money is safe. We utilize both hot & cold storage.
==API==
Integrate cryptocurrency support into a website of any kind, from invoice processing to white-labeled multi-currency wallets.
==History==
* HolyTransaction Beta: February 16th 2014
* HolyTransaction v1: April 30th 2014
* HolyTransaction v1.5: July 14th 2014
* HolyTransaction v2: October 2015
* HolyTransaction v2.5: October 2016
==External Links==
* HolyTransaction Official website
* on BitcoinTalk BitcoinTalk
* HolyTransaction on Twitter
* How to Setup HolyTransaction Wallet Quick guide to setup HolyTransaction
==Screenshots==
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Category:EWallets
Category:Wallets
Category:Exchange
Category:Services
Category:Financial
Category:Clients
Category:Frontends
Hot wallet

A hot wallet refers to a Bitcoin wallet that is online and connected in some way to the Internet. It is a term that refers to bitcoins that are not being kept in cold storage.
Bitcoin-related services and exchanges that are able to pay out withdrawals instantly can be said to be paying them from a "hot wallet". The term can also be used loosely to refer to keeping bitcoins in an exchange where they can be withdrawn on demand. Its real-world analogy is keeping cash on person: easy access, but greatest risk of unrecoverable theft in the event of an attack.
Operating a "hot wallet" is also a risk to its owner, because most computer systems have hidden vulnerabilities of some sort that can eventually be used by hackers or malware to break into the system and steal the bitcoins.
Keeping large amounts of bitcoins in a hot wallet is a fundamentally poor security practice. Most, if not all of the Bitcoin losses incurred in all the known hackings in Bitcoin history can be attributed to funds kept in hot wallets.
Most reputable services offering Bitcoin withdrawal of some sort will keep a very limited number of bitcoins in a hot wallet to enable immediate withdrawals of small/typical amounts, but will require a delay and manual activity to process a larger withdrawal, as the bitcoins are retrieved from other storage.
Category:Security
How To Judge The Bootloader Program Is Updating Or Jump To Application Program

I used a updata flag which is a four bytes word and 
is writed at fixd flash address (0x8000 - 4)
The flag's value is 0xAABBCCDD
When the bootloader program run, first it judge the updata flag,
if the updata falg is not equal 0xAABBCCDD,
it will jump to application program.
otherwise it will run to updata program.