nyuuzyou/wikis huggingface dataset:
Transaction broadcasting

==See Also==
* Transaction accelerator
Third party sites to (re-)submit a raw, signed transaction to the network; sometimes referred to as "pushtx":
* https://bitaps.com/broadcast
* https://btc.network/broadcast
* https://blockchair.com/broadcast
* https://live.blockcypher.com/btc/pushtx/
* https://www.viabtc.com/tools/broadcast
* https://www.blockchain.com/explorer/assets/btc/broadcast-transaction
* https://blockstream.info/tx/push
* https://coinb.in/#broadcast
* https://bitaccelerate.com/pushtx/
==Footnotes==
Category:Developer
Transaction expiration

Transaction expiration is a common myth/misconception. Once a Bitcoin transaction is created, it never automatically expires. In theory, a transaction could be created, get stuck at 0 confirmations for some years, and then all of a sudden confirm.
Several wallets have the behavior of deleting outgoing transactions from their transaction list after a few days of being unconfirmed. This is insane, and could lead to losses. Consider the following example
# You send a transaction. It gets stuck due to having a too-low fee.
# Your wallet deletes the transaction after a number of days.
# You still want to send the transaction, so you create a new transaction with the same value but a higher fee. This confirms.
# The recipient uses child-pays-for-parent (CPFP) to get the first transaction to also confirm. You have now paid twice, losing BTC, even though the first transaction "expired".
It is possible to create two transactions that are mutually exclusive. For example, the proper way of increasing the fee in the above example would be to send another transaction that uses exactly the same coins as the first transaction. Since a single coin can't be spent more than once, only one of the transactions will ever confirm. Actual losses due to the insane expiration behavior of certain wallets are rare because wallets often accidentally use the same coins when recreating an "expired" transaction, but it is very reckless to rely on this.
This myth may have been started by Bitcoin Core's default behavior of removing transactions from its memory pool after 72 hours (later changed to 2 weeks). Due to this behavior, it became likely in most cases that a transaction would never confirm after it went 72 hours unconfirmed. However, just because most nodes will forget about a transaction doesn't mean that everyone must or will do so. You have to plan for the worst case, not the typical case.
Category:Technical
TransferWise

Notice: service towards bitcoin exchanges appears to have been suspended as of 22 Apr 2013
An e-commerce business allowing payments and money transfers to be made from through the Internet.
TransferWise can send from either GBP funds (from U.K. bank account) or EUR funds (from a E.U. bank account) to one any of the supported destination currencies and will perform the currency conversion at mid-market rates. 
Currency directionsWhat currencies do you support?:
* British sterling pound (GBP). To Bank accounts in the UK from E.U. (EUR) bank transfers.
* Euro (EUR). To E.U. region banks from UK (GPB) bank transfers
* Polish zloty (PLN). To banks in Poland from UK (GBP) and E.U. (EUR) bank transfers
* Swiss Franc (CHF). To banks in Switzerland from UK (GBP) and E.U. (EUR) bank transfers.
The service is available for sending from an individual account or from a business account.
This ability to send directly to the recipient's bank will likely make TransferWise a preferred method that will allow those in the U.K. or E.U region to send funds when purchasing bitcoins through a person-to-person marketplace, such as the Bitcoin-otc marketplace.
Certain exchanges, such as Mt. Gox, may place restrictions on incoming bank transfers such that the name on the sender's account must be the same as name for the destination account at the exchange.
The service was launched in early 2011.
==Fees==
There is a 1 GBP fee per transfer.
==See Also==
* CurrencyFair
* Buying bitcoins
* Selling bitcoins
* Secure Trading
* Bitcoin-otc marketplace.
==External Links==
* TransferWise website
==References==
Category:Money transmitters
Transferable virtual property

Usually, digital objects (like an mp3 file or a helmet in a video game) is either infinitely duplicateable (the mp3) or controlled by a central authority (the video game servers). Transferable virtual property are digital objects that are not controlled by a central authority, can be exchanged between peers, and yet can only have a single owner.
A motivating example is the case of inventory ownership in online games (virtual worlds). Current games store your inventory on the company servers, which means all exchanges have to go through them, and you can't use the item in other games. Really, we would like a system where items are:
* granted from a reputable server to a user
* transferred freely between users
* declared by users who want to use them on another server
* verified by servers 1) to be owned by the declaring user, and 2) to have been granted from a trusted reputable server (and maybe 3, have acceptable characteristics)
==Theory==
A Passe-Partout item looks like:
* name: convenient_name
* content: arbitrary_digital_content
* creator_key_name: a_server_that_has_a_good_reputation
* origin_tx_id: the_original_bitcoin_transaction_id
* signature: original_servers_cryptographic_signature_of_the_above
* last_tx_id: the_most_recent_transaction_that_transferred_the_item_to_someone
In order to "declare" an item, the user provides the server with a copy of the item and proof that they own the output from the last_tx_id. The server can verify the signature to prove that the item is unmodified, and also trace the history of transactions to see that the user is the unique owner of the chain of transactions that lead from orign_tx_id to last_tx_id.
==Implementation==
Passe-partout is an experimental implementation that includes a demo.
Trendon Shavers

Trendon Shavers (known as Pirateat40 or simply Pirate) was the operator of the largest scam in bitcoin history: he operated a ponzi schemehttps://bitcointalk.org/index.php?topic=50822.0http://bitcoinmagazine.net/the-pirate-saga-and-so-it-ends/ which initially promised a guaranteed a daily profit of 1%, and then disappeared with an unknown amount of bitcoins in August 2012. Thoughts were that the amount was about 500,000 bitcoins, valued around US $5 million at the time. These amounts were soon quashed once investigators realized a large hoard of coins found in their analysis did not belong to Pirate, but instead to a black market website with which Pirate used to mix his funds to hide the actual amounts he had held/stolen.
== July 2013 ==
SEC (The U.S Securities and Exchange Commission) charged Trendon Shavers with defrauding investors in a Ponzi scheme.https://bitcointalk.org/index.php?topic=261290.0
== References ==
Category:Scammers
Category:Criminals
Triplemining

A mining pool|mining.
This pool aims to provide a simple reward sharing scheme and fast payments.
The service was first available for beta testing starting June 28, 2011New mining pool with proportional reward distribution.
==Jackpot system==
To give everyone a chance to grow his or her bit coins, we have developed a unique jackpot system.
Every time a block is found, we put some of the bitcoins in our jackpot. Once a week, randomly connected to the find of a block, the jackpot is paid-out to one of the members of the pool that found the block that triggered the jackpot.
This way, everyone has an equal chance, irrespective of his or her processing power, to make additional bit coins every week. The only thing you need to do to participate is to mine with us.
The weekly winner will be notified personally be email, his or her jackpot reward will be deposited into his or her account. Check out our wall of fame to see our previous jackpot winners.
==Reward distribution==
With bitcoin mining, pool hash rate (= speed), mining difficulty and a little bit of luck play a central part. Big pools can be depressing, especially if your hash rate is not that great while too small pools with a streak of bad luck leave you with some kind of a stomachache.
To counter this, Triplemining aims to bring together a medium-sized pool with no fees and clever redistribution of 1% of every found block to allow your share to grow more rapidly than on any other bitcoin mining pool.
How do we achieve this?
For every found block, we redistribute 1% of the profits to all minipool owners (people with 1 or more friends mining with them). The redistribution is connected to the shares found by your friends, not yours! So if the hash rate of your friends equals or is bigger than yours, your part in the redistribution will be equally bigger.
For every found block we increase our jackpot by the 1% taken from people who are not part of someone else's mini-pool. Once per week the jackpot is paid-out, randomly connected to the find of a block, to one miner active at the moment of the find.
==See Also==
* Comparison of mining pools
* Pooled Mining
==External Links==
* Triplemining web site
==References==
Category:Pool Operators
ru:Triplemining
TrustedCoinTrades

A site enabling users to trade peer-to-peer as well as offer or receive loans by placing free advertisements. Trade advertisements are split into categories of online or local in-person ads. The site offers escrow services as well as a safety guarantee for its Gold level members. There is also a feedback system.
==See Also==
* Exchanges
* Bitcoin OTC
==External Links==
* TrustedCoinTrades Official website
Category:Local
Category:Directories
Category:Exchanges
Category:eWallets
TumbleBit

TumbleBit is a anonymous payments protocol from 2016 that is fully compatible with today’s Bitcoin protocol. TumbleBit allows parties to make payments through an untrusted Tumbler. No-one, not even the Tumbler, can tell which payer paid which payee during a TumbleBit epoch. TumbleBit consists of two interleaved fair-exchange protocols that prevent theft of bitcoins by cheating users or a malicious Tumbler. TumbleBit combines fast cryptographic computations (performed off the blockchain) with standard bitcoin scripting functionalities (on the blockchain) that realize smart contracts.
Note that A2L is faster and uses less bandwidth than TumbleBit.
==External links==
* https://eprint.iacr.org/2016/575 - The paper
* https://github.com/BUSEC/TumbleBit - Implementation
* https://joinmarket.me/blog/blog/tumblebit-for-the-tumble-curious/
* https://medium.com/@nopara73/tumblebit-vs-coinjoin-15e5a7d58e3
* https://www.youtube.com/watch?v=8BLWUUPfh2Q&t=3787 - Talk at ScalingBitcoin 2016
* https://diyhpl.us/wiki/transcripts/scalingbitcoin/milan/tumblebit/ - Transcript of talk
==References==
Category:Privacy
Tumen Miner

Tumen Miner is a webcl miner originally created from Krad Miner. It's codebase is located on Temujin9's github account.
Original Author Notes, 2011/12/24
 Here is the dump, I may have other versions, but this was the first thing I found, it maybe the best I have. I think the important javascript parts were miner_original.js and worker_original.js (which is missing) but you maybe able to de-minfy the worker.js file.
 The whole client side of the system was just the index.html page, and those two javascript files. IIRC the 'web-worker' can't create an opencl context so all the work is done in the main javascript thread. The backend is just a proxy to a bitcoin miner, the reason it exists is just because of javascript security you have to connect to the same url/port, so that can be replaced by a modern mining proxy of some kind.
 My advice would be to study how webcl works, and get a demo of that going in your own code, then learn how the mining process works, and try to load the opencl kernel using your own webcl javascript code. then look over the worker.js and miner.js files and pick out the pieces that actually do the work of converting the bytes around to the right formats and talking to the webcl kernel. Looking at the source of poclbm and diablominer should give you an idea of the various byte conversion functions needed, krad miner works in the same ways as these miners do, only the code is in javascript and you have to deal with the strange different world of javascript.
Two-factor paper wallet

This is an old idea which is much better implemented by Two-factor mnemonic phrases
I believe it was Casascius that first talked about the idea of a "2 factor paper wallet". TL;DR - it's a system to securely generate BTC addresses given the risk of any particular machine being injected with trojans. 
(If you can find the original discussion, that would be great)
See also this BIP.
== How it works ==
# Trusted 3rd party generates a key pair (Private_1, Public_1), and sends them to you in the form of laminated paper. Public_1 is derivable from Private_1. The keys are deleted after sending.
# You generate an addition key pair (Private_2, Public_2) on your own machine.
# You cryptographically combine Public_1 and Public_2 and get Public_final - a Bitcoin address.
# You transfer BTC into Public_final
# At a later time, when you want to withdraw funds from it, you combine Private_1 and Private_2 to get Private_final, and withdraw.
The point of the system is that an attacker would have to break into both your systems in order to withdraw funds. It is a way to securely store Bitcoins even if your system potentially contains trojans, without trusting a 3rd party. This scheme can in fact be done with N parties, with each additional part just adding security to the system (suspect Party1 is a CIA snitch? That's ok, because all it takes for this to be secure is one secure party).
category:Security
USMS December 2014 auction

An auction that occurred in December 2014, hosted by the United States Marshals Service.http://www.usmarshals.gov/assets/2014/dpr-bitcoins/ 27 bids have been submitted for shares of the 50,000 bitcoins.
Block	Value 	Winner 	Winning bid	Per bitcoin
A1 	2,000 BTC	Tim Draperhttp://www.businessweek.com/news/2014-12-05/tim-draper-wins-part-of-second-silk-road-bitcoin-auctionhttp://www.bloomberg.com/news/2014-12-05/tim-draper-wins-part-of-second-silk-road-bitcoin-auction.html	Undisclosed	Undisclosed
A2 	2,000 BTC	Bitcoin Investment Trust syndicatehttps://twitter.com/BitcoinTrust/status/542341054557872129https://twitter.com/barrysilbert/status/542340947204648961 	Undisclosed	Undisclosed
A3 	2,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
A4 	2,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
A5 	2,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
A6 	2,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
A7 	2,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
A8 	2,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
A9 	2,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
A10 	2,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
B1 	3,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
B2 	3,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
B3 	3,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
B4 	3,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
B5 	3,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
B6 	3,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
B7 	3,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
B8 	3,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
B9 	3,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
B10 	3,000 BTC	Bitcoin Investment Trust syndicate 	Undisclosed	Undisclosed
==References==
Category:2014 events
USMS June 2014 auction

An auction that took place in June 2014, hosted by the United States Marshals Service. All 29,656.51306529 BTC seized from the Silk Road by the FBI were sold to Tim Draper.http://www.coindesk.com/us-marshals-one-auction-bidder-claimed-all-30000-silk-road-bitcoins/http://www.coindesk.com/tim-draper-revealed-silk-road-bitcoin-auction-winner/http://www.bizjournals.com/bizjournals/washingtonbureau/2014/07/venture-capitalist-tim-draper-wins-government.htmlhttp://www.bloomberg.com/news/2014-07-01/bitcoin-auction-ends-single-bidder-wins-entire-cache.html
Block	Value 	Winner 	Winning bid	Per bitcoin
A1 	3,000 BTC 	Tim Draper	Undisclosed	Undisclosed
A2 	3,000 BTC 	Tim Draper	Undisclosed	Undisclosed
A3 	3,000 BTC 	Tim Draper	Undisclosed	Undisclosed
A4 	3,000 BTC 	Tim Draper	Undisclosed	Undisclosed
A5 	3,000 BTC 	Tim Draper	Undisclosed	Undisclosed
A6 	3,000 BTC 	Tim Draper	Undisclosed	Undisclosed
A7 	3,000 BTC 	Tim Draper	Undisclosed	Undisclosed
A8 	3,000 BTC 	Tim Draper	Undisclosed	Undisclosed
A9 	3,000 BTC 	Tim Draper	Undisclosed	Undisclosed
B1 	2,656.51306529 BTC	Tim Draper	Undisclosed	Undisclosed
==References==
Category:2014 events
UTXO

UTXO stands for Unspent Transaction (TX) Output. Every on-chain bitcoin transaction sends bitcoin to one or more addresses, from at least zero (in case of a coinbase transcation) addresses.
A bitcoin wallet balance is actually the sum of the UTXOs controlled by the wallet's private keys.
== UTXO set ==
The UTXO set is the collection of all addresses with unspent outputs.
Category:Technical
Ubiquitous law enforcement

Ubiquitous law enforcement is a system that embeds government code into every connected appliance, hardware, vehicle, etc. It allows the highest degree imaginable of totalitarian rule. It allows for the complete suppression of individual rights and the instant subordination of every single person under it to the decrees of authoritarian rulers. It facilitates total surveillance of the population as every single piece of hardware and software becomes a government spy and enforcer.
Similarly to previous historical attempts at totalitarian rule it eventually leads to societal collapse as even the most advanced AI cannot solve the economic calculation problem. The decentralised nature of information in society requires bottom-up feedback mechanisms which are severely impeded by central economic planning.
== See Also ==
*UBI
*social credit system
*CBDC
*surveillance
Ubitex

Formerly, an exchange that intended to put people in touch with buyers and sellers in their area.
==History==
The site was announced on the bitcoin forums on April 26, 2011Ubitex: In-person Bitcoin exchange. It is listed on the GLBSE bitcoin share market and was the exchange's very first IPO.
It never launched, and was presumed to have either been a scam or a very poorly-executed plan.
==See Also==
* Exchanges
* GLBSE
==References==
Ubitious

'Ubitious' is a file sharing site.
Features:
# Very simple.
# No registration required, no logs kept.
# Unlimited file size.
# 7 days expiration after last download.
# Earn bitcoins for all your files downloads.
# Auto thumbnails feature for image and video uploads.
It's free to upload file and to download you need to pay at least 2 bitcents.
If you want to earn money for your files, you need to invest into this file first. After uploading of the file you will be given bitcoin address where to send your invested bitcoins. Price to download will be set to amount you invested. You will get 70% share for each download.
This service is ideal for selling art, songs, software.
==External links==
*Ubitious
Category:Services
Ufasoft Block Explorer

Ufasoft Block Explorer was a web-based block explorer service that provided the transaction history for both Bitcoin and other alternative crypto currencies.
It was also available from Ufasoft in their Ufasoft Coin application, which includes a block explorer function and also is multi-currency (supports alternative currencies as well) wallet program.
==External Links==
* Ufasoft Block Explorer web based service (dead link as of 17 Apr 2014)
Ufasoft miner

A CPU/GPU miner for Windows that performs Pooled Mining. This miner has SSE2 optimizations and differs from jgarzik's cpuminer. This miner was created by Ufasoft.
Originally a CPU Miner, a in March 2011 the ability to also perform as an GPU miner was added. It has two GPU implmentations: OpenCL and AMD CAL API (intermediate assembly language for GPU).Re: Yet one CPU SSE2 miner for Windows.
==See Also==
* Pooled mining
==External Links==
* Yet one CPU SSE2 miner for Windows
* Bitcoin Mining Software
==References==
Category:Miners
UkrPlat

== About the service ==
Exchange service was founded in 2004 (on other domain) as local E-Currencies / Cash exchanger. The mission of the service is to provide a high quality service for each customer, even for not standart requests. In 2024 after 20 years main domain was changed to monebot.com.
==Supported electronic currencies==
* BTC BitCoin
* USD Tether
* ETH Ethereum
* TRX Tron
etc.
==Fees and rates==
Fees and rates are vary with the exchange rates for cryptocurrency.
==External links==
MoneBot.com
Category:Exchanges
Unichange.me

Category:Exchanges
==Unichange.me==
Unichange.me is created to serve all people willing to make fast, secure and reliable buy, sell or exchange operations with Bitcoin.
Its team consists of experienced players of e-currency exchange market, striving to provide high-level of work to our clients. Unichange.me staff members have more than 8 years of experience in financial sphere.
==Features==
* Highly secured transactions: SSL encryption is used for all orders placed on the website.
* Large reserves: amount of reserves is appropriate for any bulk buyer or wholesaler.
* Reliable service: All orders of Unichange.me are completed in a timely manner and on the conditions stated on the website.
==Buy options==
Unichange.me offers the clients wide variety of Bitcoin wallet deposit methods - Perfect Money USD/EUR, OkPay USD, FasaPay USD, JustForex USD.
Perfect Money USD
Perfect Money EUR
OkPay USD
FasaPay USD
JustForex USD
==Sell options==
Unichange.me propose the customers a wide choice of Bitcoin withdrawal methods among which bank transfer USD/EUR, Western Union USD money transfer, Unichange.me debit card, personal credit/debit card USD/EUR, Perfect Money USD/EUR, OkPay USD, FasaPay USD/IDR, Paypal USD, JustForex USD.
Bank transfer USD
Bank transfer EUR
Western Union USD
Unichange.me debit card USD
Debit/debit card USD
Debit/credit card EUR
Perfect Money USD
Perfect Money EUR
OkPay USD
FasaPay USD
FasaPay IDR
PayPal USD
JustForex USD
==Bitcoin debit card ==
Unichange has designed special offer for active Bitcoin users - Unichange debit card for fast Bitcoin withdrawal to fiat money.
Basic features of Unichange card:
*the cost of the card is $14
*possibility to order Unichange card in USD, EUR or GBP currency
*card maintenance fee is $1/month
*high limits (posibility to withdraw up to $60,000/€60,000/£48,000)
*the card can be used for offline, online shopping and ATM withdrawals
More information about the card check here https://unichange.me/debit_cards
==Fees==
Fees on Unichange.me are constantly changing as service propose large amount of offers and deals, so it is better to check rates for all exchange directions on website directly. You can check all Unichange.me fees here https://unichange.me/fees
==Affiliate program==
Unichange.me service invites everyone to participate in Affiliate program and earn % of referrals' exchange commission.
Clients of Unichange.me service meet all benefits of the Affiliate program:
* Simple and transparent Affiliate Program.
* Wide choice of promo materials for your website.
* Free participation, requiring no additional conditions.
* Attractive fees for affiliates, 3 levels of Affiliate program.
* Reliable and stable service with supportive team.
* Wide variety of withdrawal methods.
You can check detailed information about Affiliate Program here https://unichange.me/partner_program
==External links==
*Unichange.me website
*User registration
*About Unichange.me debit card
*Unichange.me fees
*Affiliate Program