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Bitcoin transaction demo
 
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Bitcoin transaction demo
Views: 5246 luke millard
How transactions are verified in Bitcoin Blockchain - Longest chain rule explained
 
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How transactions are verified in Bitcoin Blockchain - Longest chain rule explained Watch our earlier Blockchain videos Blockchain Simplified: https://www.youtube.com/watch?v=LWAYveDotb0&t=1s Blockchain Technology explained: https://www.youtube.com/watch?v=gVLIentRlIk&t=1s Have you wondered how transaction get approved in a Bitcoin block chain? Why you need to wait for 3 to 6 confirmations for the transactions to appear in your wallet. This video attempts to explain how a Bitcoin transaction is approved and the process behind it. Let’s assume Mr. Gobish transferred Bitcoin worth 100$ from one crypto exchange to another. Once he does the transfer, the transaction message is sent to the network and passed around all the network participants which are also called nodes. This is added to the transaction pool. Currently, the transaction is in an ‘unconfirmed’ state. All the transactions in the transaction pool will be in an unconfirmed status. Now we will understand who is a miner. In simple words, those who validate new transactions and record them on the global ledger of Blockchain are called miners and this activity is called mining. To make it simple, let’s assume there are currently 3 miners who are trying to confirm the transactions from transaction pool including Gobish’s transaction of $ 100. Normally miners will select those transactions which will generate a higher transaction fees for them. Currently, the numbers of confirmed blocks in the Blockchain public ledger is 998. Once the miners identify that the 998th block is a valid block they will try to create a candidate block by adding unconfirmed transactions from the transaction pool. Now these miners are trying to add the 999th block. To add the blocks they have to solve a complex mathematical problem. This is known as Proof of Work (POW). Let’s assume all the 3 miners were able to solve this problem and have Proof of Work. Now we have 3 different candidate blocks, let’s call them 999 A, 999B and 999C Now which of these block will form part of the valid block will depend upon the longest chain rule. Let’s understand what is longest chain rule is. Now there are other miners who are trying to create other valid blocks and based upon the speed by which a block is created others miners will keep on adding their blocks on top of the earlier blocks. Here in this case Minor C had a better processor which was able to create a block faster than the miner A and B and hence new blocks were created on top of the block 999C. Now the longest chain is the one created by 999C and it will be keep on adding other blocks like 1000, 1001 and so on as miner C solved the proof of work before miner A and B. So what happens to the blocks 999A and 999B? They have to create the Proof of Work again with new set of transactions from the transaction base. Each confirmations represent adding each block. Each confirmation will take on an average of around 10 minutes or more per block. Applying the longest chain rule and proof of work, unconfirmed transaction will become a confirmed transaction and added to the Blockchain ledger Once the blocks are added miner will receive a transactions fees and block fees which will be the new Bitcoin created as an incentive for approving the transactions. Block rewards will be reducing every year and in the end only transaction fees will be there as new Bitcoins will not be created. We will get in to more details about mining and the incentives in our subsequent video.
Views: 13563 FINMAESTRO
Bitcoin - Transaction block chains
 
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The mechanics of a bitcoin transaction block chain, which is a construct that is generated by bitcoin miners and functions as a global ledger for recording and validating bitcoins. More free lessons at: http://www.khanacademy.org/video?v=QzDO44oZWtE Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief Scientist at Sourcefire. He received his Ph.D. in computer science from MIT.
Views: 211733 Khan Academy
How Bitcoin Works in 5 Minutes (Technical)
 
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A short introduction to how Bitcoin Works. Want more? Check out my new in-depth course on the latest in Bitcoin, Blockchain, and a survey of the most exciting projects coming out (Ethereum, etc): https://app.pluralsight.com/library/courses/bitcoin-decentralized-technology Lots of demos on how to buy, send, store (hardware, paper wallet). how to use javascript to send bitcoin. How to create Ethereum Smart Contract, much more. Written Version: http://www.imponderablethings.com/2014/04/how-bitcoin-works-in-5-minutes.html Less technical version: https://www.youtube.com/watch?v=t5JGQXCTe3c Donation address: 1K7A6wsyxj6fThtMYcNu6X8bLbnNKovgtP Germain caption translation provided by adi331 : 19s6rqRfHa19w7wcgwtCumPs1vdLDj1VVo (thanks!!)
Views: 5706911 CuriousInventor
Blockchain tutorial 27: Bitcoin raw transaction and transaction id
 
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This is part 27 of the Blockchain tutorial. This tutorial explains: - What Bitcoin raw transaction is. - Shows an example of a raw transaction using the very first transaction on the Genesis block. - What the difference is between big endian and little endian. - What a satoshi is. - What a Bitcoin transaction id or hash is and what its purpose is. - How to calculate the transaction id. In this video series different topics will be explained which will help you to understand blockchain. Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons). After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc). Bitcoin's underlying technology is called Blockchain. The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block. Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application. New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum. Ethereum focuses on running programming code, called smart contracts, on any decentralized application. Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few. Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors. Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept. This video series tries to explain Blockchain to a large audience but from the bottom up. Keywords often used in Blockchain conversation will be explained. Each Blockchain video is short and to the point. It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier. Check out all my other Blockchain tutorial videos https://goo.gl/aMTFHU Subscribe to my YouTube channel https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html The 3 links mentioned in the video are: - The bitcoin_genesis_raw_tx.txt file http://www.mobilefish.com/download/cryptocurrency/bitcoin_genesis_raw_tx.txt - The Bitcoin protocol: https://en.bitcoin.it/wiki/Protocol_documentation#tx - The block explorer used in the video: https://blockchain.info/ The python script to calculate the transaction id: http://www.mobilefish.com/download/cryptocurrency/calculate_txid.py.txt The brainwallet tool to convert the raw transaction into a more readable text: http://www.mobilefish.com/services/cryptocurrency/brainwallet.html #mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
Views: 6390 Mobilefish.com
Bitcoin: How to Create a Raw Transaction
 
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Step by step guide on creating a raw transaction with bitcoin core client. createrawtransaction '[{"txid":"", "vout":}]' '{"1anyAddress":0.01,"1changeAddress":0.05}' signrawtransaction 'hash' '[{"txid":"", "vout":n,"scriptPubKey":""}]' '["privatekey"]'
Views: 10414 m1xolyd1an
How Bitcoin Works Under the Hood
 
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A somewhat technical explanation of how Bitcoin works. Want more? Check out my new in-depth course on the latest in Bitcoin, Blockchain, and a survey of the most exciting projects coming out (Ethereum, etc): https://app.pluralsight.com/library/courses/bitcoin-decentralized-technology Lots of demos on how to buy, send, store (hardware, paper wallet). how to use javascript to send bitcoin. How to create Ethereum Smart Contract, much more. Shorter 5 min introduction: https://www.youtube.com/watch?v=t5JGQXCTe3c Written version: http://www.imponderablethings.com/2013/07/how-bitcoin-works-under-hood.html My Bitcoin address: 13v8NB9ScRa21JDi86GmnZ5d8Z4CjhZMEd Arabic translation by Ahmad Alloush Spanish caption translation by Borja Rodrigo, [email protected], DFJWgXdBCoQqo4noF4fyVhVp8R6V62XdJx Russian caption translation by Alexandra Miklyukova Italian voice over: http://youtu.be/1aEf3qr7UdE Italian captions translated by Simone Falcini, 1H5KdCnBooxfqpXtyQBBAKKRU7MkCZCVCe
Views: 2681995 CuriousInventor
Blockchain - How To Verify A Bitcoin Transaction And Get Your Hash ID
 
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For more tips like these visit http://bodymindsuccess.com/bitcoin or subscribe to our channel
Views: 64801 Crypto Currency Wealth
Bitcoin Lesson | Transactions
 
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An explanation of how bitcoin transactions work. 01:27 - Transaction Basics ↳ 08:45 - Change ↳ 12:49 - Graph ↳ 15:10 - Coinbase Transaction ↳ 17:24 - Fees 20:00 - Transaction Data ↳ 35:22 - Signing ↳ 48:20 - Summary 54:20 - Live Example ↳ 1:02:45 - Code http://learnmeabitcoin.com/code - Transaction Builder & Command-Line Tools For more simple explanations of how bitcoin works, visit my website: http://learnmeabitcoin.com If you found this video helpful, please buy me a beer: 3Beer3irc1vgs76ENA4coqsEQpGZeM5CTd
Views: 1590 learnmeabitcoin
Signing transactions - Blockchain in Javascript (part 4)
 
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Transactions on a blockchain have to be signed with a private key. This makes sure that people can only spend coins if they have the private key of their wallet. In this video we will refactor our Javascript blockchain so that it will only accept signed transactions. We'll use the secp256k1 elliptic curve to generate a keypair. The same algorithm used in Bitcoin. But you can use other algorithms as well. 🤲 Source code Available on GitHub: https://github.com/SavjeeTutorials/SavjeeCoin 💰 Buy Bitcoin, Ethereum, Litecoin, .. Get $10 for free when buying through my affiliate link (thanks!): https://goo.gl/G9NQsu 🌍 Social Twitter: https://twitter.com/savjee Facebook: https://www.facebook.com/savjee ✏️ Check out my blog https://www.savjee.be
How To Build Raw Bitcoin Transactions in NodeJS
 
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This developer how to video is a simple example of how to use the bitcoinjs-lib library in order to create bitcoin addresses and build raw transactions. Bitcoin JS Library: https://github.com/bitcoinjs/bitcoinjs-lib Examples: https://github.com/coinables/bitcoinjs-lib-Examples
Views: 2876 m1xolyd1an
HowTo Send a Bitcoin Transaction with JavaScript & Bitcore
 
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http://bit.ly/bitcoincourse (full course) This will demo creating a Bitcoin address and transaction using JavaScript and the Bitcore.io library. Full source code is available at the link.
Views: 22173 CuriousInventor
Blockchain 101 - A Visual Demo
 
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This is a very basic visual introduction to the concepts behind a blockchain. We introduce the idea of an immutable ledger using an interactive web demo. Part 2 is here: https://youtu.be/xIDL_akeras If you are interested in playing with this on your own, it is available online at: http://anders.com/blockchain/ The code that runs this demo is also on GitHub: https://github.com/anders94/blockchain-demo I'm @anders94 on Twitter and @andersbrownworth on Steemit. Donations: BTC: 1K3NvcuZzVTueHW1qhkG2Cm3viRkh2EXJp ETH: 0x84a90e21d9d02e30ddcea56d618aa75ba90331ff ETC: 0xab75ad757c89fa33b92090193a797e6700769ef8
Views: 972957 Anders Brownworth
How does a blockchain work - Simply Explained
 
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What is a blockchain and how do they work? I'll explain why blockchains are so special in simple and plain English! 💰 Want to buy Bitcoin or Ethereum? Buy for $100 and get $10 free (through my affiliate link): https://www.coinbase.com/join/59284524822a3d0b19e11134 📚 Sources can be found on my website: https://www.savjee.be/videos/simply-explained/how-does-a-blockchain-work/ 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be ✉️ Subscribe to newsletter: https://goo.gl/nueDfz 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Views: 3042622 Simply Explained - Savjee
*Easy* Bitcoin Transaction Walkthrough
 
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Check out my other videos on my Blog http://www.onedailyidea.com This video is a walk through on how to do a transaction using Bitcoins. We utilize 2 different apps for this CoinBase app for the seller: http://blog.coinbase.com/post/44730207780/the-coinbase-android-app-has-launched Bitcoin Wallet: https://play.google.com/store/apps/details?id=de.schildbach.wallet We used Android phones but you can use any of the Smart phones on the market for this.
Views: 29351 Everyman DIY
Cancel BTC Transfer Transaction Blockchain 2019
 
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Donwload: https://www.sendspace.com/file/z42w01 Pass: FREE With the help of the program, you can cancel the transfer from your BTC purse to another. Perhaps only in cases where you just transferred money and goes PENDING, in any other cases it will not work! Let's consider an example: You buy product (service), and you ask to pay. You transfer your money to their wallet, they instantly get rid of your account and go to the purse of the seller. The seller will see the transfer in his purse and throw you the goods. You will have a time from 2 to 30 minutes before the confirmation of the transaction to return money to your wallet. As a result, you will receive the goods and your money back. The program is exclusive and there are no Analogues, therefore I ask to help me in development and to throw off a little $ on a purse 1qzxMbY2g9dnAkRzx3xvBu8Pme1ApnWpc ----------------------------------------------------------------------------------------------------------- С помощью программы можно отменить перевод с своего кошелька ВТС на другой. Возможно только в том случаи, когда вы только перевели деньги и идет ПЕНДИНГ, в любом другом случаи не выйдет ! Рассмотрим пример: Вы покупаете товар(услугу), и вас просят заплатить. Вы переводите свои деньги на их кошелек, они моментально спишутся с вашего счета и уйдут на кошелек продавца. Продавец увидеть перевод у себя на кошельке и скинет вам товар. У вас будет время от 2 до 30 мин до момента подтверждения сделки на возврат денег на свой кошелек. В итоге вы получите и товар и свои деньги назад. Программа эксклюзив и Аналогов НЕТ, потому прошу помочь мне в развитии и скинуть немного $ на кошелек 1qzxMbY2g9dnAkRzx3xvBu8Pme1ApnWpc
Views: 8420 Easily BTC
George Levy - What is a Bitcoin Transaction?
 
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https://GeorgeLevy.com/Free presents: In this video I explain what a Bitcoin transaction is, what the contents of a Bitcoin transaction are and I present an example of sending and receiving bitcoins. Featuring content a sample lesson taken from the Bitcoin Advanced Level: Transactions course from Blockchain Institute of Technology (https://BlockchainInstituteofTechnology.com) at: https://courses.blockchaininstituteoftechnology.com/courses/bitcoin-advanced-transactions
Views: 2109 George Levy
Blockchain 101 Ep 17 - Why are Bitcoin transactions charged by bytes?
 
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Our banks usually charge a fee based on a percentage of the transaction amount we are sending. For example, 0.5% for inter-bank transactions. 0.1-1% for transactions across different cities, and for transnational transfers, on top of the commission fees, there are additional cable charges too. For cryptocurrencies, transaction fees are based on the size of the transaction in bytes, not the amount transferred. For instance, an average Bitcoin transaction takes up 250 bytes, the transaction fee will be around 0.001-0.0015 Bitcoin. If you’re sending Bitcoins to multiple addresses in one transaction, then the transaction will be a larger byte size, hence you may want to pay a higher transaction fee, in order to attract miners to process your transaction. Yet, from a cost perspective, it is highly advantageous to utilize blockchain technology for cross-border transactions. Watch the video here! Huobi Pro will post a question in our Tweet via our Twitter account (https://twitter.com/Huobi_Pro) each time we put up an episode of Blockchain 101 post on our Twitter account, we will randomly select 20 people who answered in the format [UIDxxxxxxxx, correct answer] and retweet our post will be entitled to 1 HT each. Note that the UID entered MUST be a valid Huobi registered account. What are you waiting for? Fastest fingers first! Grab your HT now!
Views: 839 Huobi Global
BitCoin Transaction Visualization
 
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A brief demonstration of gathering information from the bitcoin blockchain and visualizing the data. Kali Linux: https://www.kali.org Maltego: https://www.paterva.com/web7/buy/maltego-clients/maltego-ce.php BitCoin Transform: http://maltego.blogspot.com/2016/04/visualization-bitcoin-blockchain-in.html
Views: 1340 Art Vandelay
Advanced Bitcoin Scripting -- Part 1: Transactions & Multisig
 
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This is the first part of a more technical talk where Andreas explores Bitcoin script, with examples from the 2nd edition of Mastering Bitcoin, focusing on the use of conditional statements, flow control, guard clauses and time locks. The examples will include advanced multi-signature scripts, hash time lock contracts and asymmetric revocable commitments. Then he answers questions about Bitcoin's quirky bugs, where Bitcoin differs from Ethereum at a scripting level, how SegWit works, how consensus rules change, and whether Bitcoin is more than just a currency. Watch Part 2 here: https://youtu.be/pQbeBduVQ4I This talk took place at the San Francisco Bitcoin Developer (@SFBitcoinDev) meetup on April 3rd, 2017: https://www.meetup.com/SF-Bitcoin-Devs/events/238773843/ Review materials on the topics presented: Chpt. 7: https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch07.asciidoc Chpt. 12: https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch12.asciidoc The fundamentals of Bitcoin script 2:17 Bitcoin's operators 5:00 Creating transactions (P2PKH - Pay to Public Key Hash) 6:30 Public Key CheckSigs, security by obfuscating public keys 7:42 Redeeming the script 9:05 The RIPEMD160 hash operation 12:05 OP_EQUALVERIFY, OP_CHECKSIG, & the elliptic curve digital signature algorithm (ECDSA) 14:05 Summary 18:30 Illustrating scripts: Equal, EqualVerify, CheckSig, CheckVerify, CheckMultisig, CheckLockTimeVerify 19:45 Guard clauses 23:02 Script-based timelocks 24:53 Flow control statements, interactive artificial intelligence 26:50 If, Else, EndIf 28:35 Unlocking scripts, what conditional flows do in Bitcoin 33:55 1-of-2 multi-signature script 35:44 1-of-2 multi-signature script with guard clause 38:28 2-of-3 multi-signature script 41:30 2-of-3 multi-signature script with timelock guard clause 43:20 BIP-113, how time is referenced in Bitcoin 44:42 Backup clause & other nuances in multi-signature schemes 46:58 Game theory, complexity from simplicity 52:36 2-of-3 multi-signature script, unlocking 53:45 RELATED: Bitcoin: Where the Laws of Mathematics Prevail - https://youtu.be/HaJ1hvon0E0 The rules of Bitcoin (part 1) - https://youtu.be/VnQu4uylfOs The rules of Bitcoin (part 2) - https://youtu.be/vtIp0GP4w1E Forkology: A Study of Forks for Newbies - https://youtu.be/rpeceXY1QBM Irreversibility and consumer protection - https://youtu.be/R107YWu5XzU Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and well-respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Subscribe to the channel to learn more about Bitcoin & open blockchains! If you want early-access to talks and a chance to participate in a monthly LIVE Q&A with Andreas, become a patron: https://www.patreon.com/aantonop Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 32371 aantonop
Blockchain/Bitcoin for beginners 7: Blockchain header: Merkle roots and SPV transaction verification
 
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How are transactions stored (and recorded) in the Blockchain blocks? Using a concept called a Merkle tree - in this video I break it down in depth with a simple example and show how a SPV node (Simple Payment Verification) node that does not keep a full copy of the blockchain transaction history - just the headers of the blocks - can verify from an adjacent (but not necessarily trusted) full node, which block a transaction is part of just from knowing the MERKLE PATH from the full node. http://chimera.labs.oreilly.com/books/1234000001802/ch07.html
Views: 13237 Matt Thomas
Bitcoin and Websocket - Real-Time Live Transactions
 
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In this video I go over websocket and how to implement a bitcoin websocket in your website to display new transactions in real-time using javascript and jquery . My Bitcoin Web Dev Book: https://btcthreads.com/book Get the code from this video here: http://btcthreads.com/websocket.html Follow me on twitter: https://twitter.com/coinableS https://bitcointalk.org/index.php?topic=990348.0
Views: 8387 m1xolyd1an
Adding Transactions to the Blockchain: Concepts - Blockchain in Rust #04: Transactions 1
 
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What does it mean to own a Bitcoin? How do transactions work on the blockchain? In this concept video (no coding!) we'll go over the basics of how and why transactions work on the blockchain. Timestamps 00:40 Example transaction 01:45 Transaction verification requirements 04:55 The blockchain as a "distributed ledger" 06:12 Structure of a transaction 08:09 Regular transactions 10:30 Coinbase transactions 12:10 Transactions: Bad Artwork 12:50 Recap 13:24 Meeting tx verification requirements 13:38 Overspending 14:10 Double spending 15:36 Impersonation 16:58 Further reading Links Code repo: https://github.com/GeekLaunch/blockchain-rust Slides: https://geeklaunch.net/slides/Blockchain%20In%20Rust%2004.pdf Bitcoin Transaction Rules: https://en.bitcoin.it/wiki/Protocol_rules#.22tx.22_messages Coinbase Transaction: https://bitcoin.org/en/glossary/coinbase How is a transaction’s output signed? https://bitcoin.stackexchange.com/q/45693 What is a double-spend? https://bitcoin.stackexchange.com/q/4974 http://geeklaunch.net/ Support GeekLaunch on Patreon: https://www.patreon.com/GeekLaunch Follow GeekLaunch on Twitter: https://twitter.com/Geek_Launch GeekLaunch produces educational videos covering such topics as Linux, web development (including HTML5, CSS 3, JavaScript, and PHP), tips for power users, among many others. Subscribe: New video every Wednesday! Not a geek? Start today!
Views: 242 GeekLaunch
Blockchain/Bitcoin for beginners 8: Bitcoin addresses, public key hash, P2PKH transactions
 
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Before we delve into the inner workings of a bitcoin transaction I wanted to explain how the actual bitcoin address is derived from the public key which in turn is derived from the private key. I take through step by step all the steps required to derived the checksums etc and show with a real example of a real bitcoin transaction. Also discuss why checksums are included in Bitcoin addresses in order to eliminate the possibility of characters being corrupted, or modified in transit. This is the cool tool for converted from base 58 encoded value to hex value. http://lenschulwitz.com/base58 Good link talking about base 58 encoding. https://en.bitcoin.it/wiki/Base58Check_encoding
Views: 12538 Matt Thomas
Bitcoin from the Command Line - Sending Bitcoin Transactions Programmatically with Javascript
 
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One of the common complaints with Bitcoin is that it’s pretty hard to get started, and there’s a lot of overhead to making accounts and sending transactions. So I want to show everyone a really simple workflow that I’ve been using to interact with the Bitcoin blockchain from my command line using Javascript. This isn’t a workflow that I would recommend for long-term storage (though there isn’t anything wrong with it necessarily, I still would recommend hardware wallets for long-term crypto-asset storage) but it is a good workflow for hacking around, sending money and building apps. Video Notes: https://gist.github.com/AlwaysBCoding/4af36dfc7c6e7d11c0af1621b695a944 Crypto Donation Links: BTC: 1HewuvpGP1fwprdcg2yru5ss28tGCo4wg8 ETH: 0xC46CDe805aCC8e7507E53E36486C7D8600559d65 XMR: 42HvHqtwg2dcZqDfLZjK8Xc8LyFKN7i3XCipbVSFDJLVGsdUN5pT3e7LExz9QTaGzdGdrEohXzvkeFmdZK1MPGX92xqftUn
Views: 8082 Decypher Media
This Is How Bitcoin Transactions Work
 
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What I’m going to do now is show you how a Bitcoin transaction works. Now most transactions work in a similar way whether you’re buying, receiving and so on. So lets jump into showing you how it all works now, so you understand the process. // VIDEO TAKEN FROM // View: https://www.udemy.com/bitcoin-for-beginners/?couponCode=YOUTUBE10 // RECOMMENDED RESOURCES // Zapaygo: http://bit.ly/2AldzmP Binance: http://bit.ly/2Hji5nQ // FREE BITCOIN WEBINAR // Join: http://bit.ly/2AR6v2v // CRYPTOCURRENCY & BLOCKCHAIN TUTORIALS // Sign-Up: https://www.b21block.com // FOLLOW US ONLINE // Subscribe: https://youtube.com/c/RavinderDeolB21Block?sub_confirmation=1 Like: https://facebook.com/B21Block
What is UNSPENT TRANSACTION OUTPUT? What does UNSPENT TRANSACTION OUTPUT mean?
 
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What is UNSPENT TRANSACTION OUTPUT? What does UNSPENT TRANSACTION OUTPUT mean? UNSPENT TRANSACTION OUTPUT meaning - UNSPENT TRANSACTION OUTPUT definition - UNSPENT TRANSACTION OUTPUT explanation. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. In cryptocurrencies, an unspent transaction output (UTXO) is an output of a blockchain transaction that has not been spent, i.e. used as an input in a new transaction. Bitcoin is the most famous example of a cryptocurrency that uses the UTXO model. Outputs are a superset of UTXOs. Accordingly, UTXOs are a subset of the outputs superset. Bitcoin UTXO lifespans have been studied. In the case of a valid blockchain transaction, unspent outputs (and only unspent outputs) may be used to effect further transactions. The requirement that only unspent outputs may be used in further transactions is necessary to prevent 'double spending' and/or fraud. For this reason, inputs on a blockchain are deleted when a transaction occurs, whilst at the same time, outputs are created in the form of UTXOs. These unspent transaction outputs may be used (by the holders of private keys; for example, persons with cryptocurrency wallets) for the purpose of future transactions.
Views: 581 The Audiopedia
How to Trace a Bitcoin Transaction using a Bitcoin receiving address
 
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The Crypto Dad shows you how to trace a Bitcoin transaction. Important software used is: Electrum bitcoin wallet: https://electrum.org/#home The Blockchain explorer: https://blockchain.info/ X-Mirage Mirroring Software: http://www.x-mirage.com/ Get the Blockchain Bitcoin Wallet App! https://itunes.apple.com/us/app/blockchain-bitcoin-wallet/id493253309 Donate Bitcoins: 1JBxwXG8P6PYKKsrHKzQduM8s8RoV3dnjr
Views: 18117 Rex Kneisley
Blockchain Applications | Top 5 Decentralized Applications | Blockchain Training | Edureka
 
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***** Blockchain Training : https://www.edureka.co/blockchain-training ***** This Edureka video on "Blockchain Applications" will give you a walkthrough on how traditional applications differ from Blockchain applications and how Blockchain applications are developed. It will also list down the top 5 Blockchain applications that have been developed till date. Below are the topics covered in this video: 0:35 - Traditional application 3:00 - Blockchain Applications 5:36 - Technology Stack 6:45 - Advantage of Dapps 8:45 - Top 5 Blockchain Applications For doubts & queries on Blockchain, post the same on Edureka Community: https://www.edureka.co/community/blockchain Blockchain Blog Series: https://goo.gl/DPoAHR Blockchain Tutorial Playlist: http://bit.ly/2PZb8fd - - - - - - - - - - - - - - - - - Do subscribe to our channel and hit the bell icon to never miss an update from us in the future: https://goo.gl/6ohpTV Instagram: https://www.instagram.com/edureka_learning/ Facebook: https://www.facebook.com/edurekaIN/ Twitter: https://twitter.com/edurekain LinkedIn: https://www.linkedin.com/company/edureka #blockchain #decentralisedapplications #blockchainexplained #blockchainonlinetraining #blockchainapplications #blockchainforbeginners - - - - - - - - - - - - - - - - - About the Course Edureka's Blockchain Course is designed to introduce you to the concept of Blockchain and explain the fundamentals of blockchain and bitcoin. Blockchain course will provide an overview of the structure and mechanism of blockchain. As a beginner, you will be learning the importance of consensus in transactions, how transactions are stored on blockchain, history of bitcoin and how to use bitcoin. Furthermore, you will be taught about the Ethereum platform and its programming language. You will setup your own private blockchain environment using Ethereum. Also, you will develop a smart contract on private Ethereum blockchain and will be deploying the contract from web and console. The course is fed with various use-cases and examples, which makes the learning more interesting. After completing this course, you should be able to: 1. Comprehend the cryptography and cryptocurrency concepts 2. Encompass the concept of a blockchain 3. Understand the importance of blockchain technology 4. Have a deep insight into bitcoin and its network 5. Perceive, how bitcoin transactions are validated by miners 6. Create and use bitcoin account effectively 7. Understand Ethereum blockchain 8. Learn Solidity: Prominent language to develop smart contracts 9. Deploy your private blockchain on the web where you can visually see your chains 10. Send transactions between nodes 11. Develop more than one nodes on the same blockchain 12. Making your own cryptocurrency 13. Discuss the compelling use-cases of the blockchain 14. Interpret the prospects of the blockchain 15. Assess, how blockchain can improve your business standards. ----------------------------------- Who should go for this course? Anyone having basic programming knowledge and has a zeal to learn new technology can take up the course. Students and professionals aspiring to make a career in the Blockchain technology should opt for the course. ----------------------------------- Why learn Blockchain? Blockchain is a revolutionary technology. It is an ordered back linked-list data structure of blocks of transactions stored in a decentralized peer-to-peer network. It is the underlying infrastructure for bitcoin, a popular cryptocurrency. In near future, many companies will be adopting blockchain technologies for trading publicly. Apart from bitcoin, it can be used for a wide variety of applications such as tracking ownership, digital assets, physical assets, or voting rights. It can also store and run computer code called ‘smart contracts’. However, blockchain is still new and the communities are still exploring the best ways in which it can be used. For more information, Please write back to us at [email protected] or call us at IND: 9606058406 / US: 18338555775 (toll free).
Views: 9854 edureka!
How To Double Spend Your Stuck Bitcoin Transaction with FSS-RBF
 
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In this video I show you how to execute a double-spend using the node policy First-Seen-Safe Replace-By-Fee. My Book: https://www.amazon.com/Building-Bitcoin-Websites-Beginners-Development/dp/153494544X BTC: 1NPrfWgJfkANmd1jt88A141PjhiarT8d9U This video idea came from the good folks at bitzuma, check out their article on this topic http://bitzuma.com/posts/how-to-clear-a-stuck-bitcoin-transaction/
Views: 79634 m1xolyd1an
Bitcoin Q&A: Offline transactions and fault tolerance
 
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Is it possible to do a bitcoin transaction without using the internet? How do transactions from paper wallets and physical bitcoins work? Does this solve the Byzantine Generals' Problem? NOTE: OpenDimes utilize some additional security measures, especially regarding key generation, which paper wallets and other physical bitcoins do not. When sealed, the public key is accessible and you are able to check the balance, but you cannot access the private key without unsealing, i.e. breaking part of the hardware device. Learn more about how they work here: https://opendime.com/faq This question is from the MOOC session 8.2 covering the Byzantine Generals' Problem, which took place on September 15th 2017. Andreas is a teaching fellow with the University of Nicosia. The first course in their Master of Science in Digital Currency degree, DFIN-511: Introduction to Digital Currencies, is offered for free as an open enrollment MOOC course to anyone interested in learning about the fundamental principles. If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron: https://www.patreon.com/aantonop RELATED: Consensus Algorithms, Blockchain Technology, and Bitcoin - https://youtu.be/fw3WkySh_Ho Advanced Bitcoin Scripting Part 1: Transactions and Multisig - https://youtu.be/8FeAXjkmDcQ Advanced Bitcoin Scripting Part 2: SegWit, Consensus, and Trustware - https://youtu.be/pQbeBduVQ4I What is Consensus: Rules without Rulers - https://youtu.be/2tqo7PX5Pyc Forkology: A Study of Forks for Newbies - https://youtu.be/rpeceXY1QBM Bitcoin: Where the Laws of Mathematics Prevail - https://youtu.be/HaJ1hvon0E0 The rules of Bitcoin (part 1) - https://youtu.be/VnQu4uylfOs The rules of Bitcoin (part 2) - https://youtu.be/vtIp0GP4w1E Decentralized power, leaderless governance - https://youtu.be/E5VbDlQTPzU Scaling, trust, and trade-offs - https://youtu.be/vCxmHwqyJWU Using paper wallets - https://youtu.be/cKehFazo8Pw Why running a node is important - https://youtu.be/oX0Yrv-6jVs SegWit adoption - https://youtu.be/KCsTVTRk6I4 Public keys vs. addresses - https://youtu.be/8es3qQWkEiU How do mnemonic seeds work? - https://youtu.be/wWCIQFNf_8g Intrinsic vs. extrinsic assets - https://youtu.be/KDtfFNZy9xg Decentralised exchanges with fiat - https://youtu.be/3Url8tbQEkA Running nodes and payment channels - https://youtu.be/ndcfBfE_yoY Secure, tiered storage system - https://youtu.be/uYIVuZgN95M Solar energy and mining in space - https://youtu.be/cusakcpa8AM Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 [NEW] THE INTERNET OF MONEY, v2: https://www.amazon.com/Internet-Money-Andreas-M-Antonopoulos/dp/194791006X/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Subscribe to the channel to learn more about Bitcoin & open blockchains! Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 6944 aantonop
Create a Bitcoin transaction by hand (see description for the tutorial)
 
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Quick waltkthrough for the "Create a Bitcoin transaction by hand" CodeProject article: http://www.codeproject.com/Articles/1151054/Create-a-Bitcoin-transaction-by-hand
Views: 1947 nopara73
Bitcoin: How Cryptocurrencies Work
 
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Whether or not it's worth investing in, the math behind Bitcoin is an elegant solution to some complex problems. Hosted by: Michael Aranda Special Thanks: Dalton Hubble Learn more about Cryptography: https://www.youtube.com/watch?v=-yFZGF8FHSg ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Bella Nash, Kevin Bealer, Mark Terrio-Cameron, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Will and Sonja Marple, Philippe von Bergen, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://bitinfocharts.com/ https://chrispacia.wordpress.com/2013/09/02/bitcoin-mining-explained-like-youre-five-part-2-mechanics/ https://www.youtube.com/watch?v=Lx9zgZCMqXE https://www.youtube.com/watch?v=nQZUi24TrdI https://bitcoin.org/en/how-it-works http://www.forbes.com/sites/investopedia/2013/08/01/how-bitcoin-works/#36bd8b2d25ee http://www.makeuseof.com/tag/how-does-bitcoin-work/ https://blockchain.info/charts/total-bitcoins https://en.bitcoin.it/wiki/Controlled_supply https://www.bitcoinmining.com/ http://bitamplify.com/mobile/?a=news Image Sources: https://commons.wikimedia.org/wiki/File:Cryptocurrency_Mining_Farm.jpg
Views: 2764141 SciShow
What is Bitcoin? Detailed Explanation for Beginners
 
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In this video I discuss the purpose of bitcoin along with an example of how transactions are made and sent. I attempt to explain everything simply at a high-level so anyone can understand. The following topics are covered in my video: 1. Current Day Transaction - What it takes to send money online to someone else. 2. The purpose of bitcoin. 3. Private Keys/Public Keys/ Public Addresses 3. An example of what information is needed in order to transact in bitcoin. 4. How the nodes/miner interact with the transactions. 5. What purpose the blockchain serves. 6. How a transaction gets approved and appended to the blockchain. 7. How the miners solve the proof-of-work in order to append the transaction block on the blockchain and receive transaction fees/coinbase rewards. 8. Important traits of bitcoin. CONNECT WITH ME ONLINE http://mainstreetwolf.com/ https://www.facebook.com/mainstreetwolf https://www.instagram.com/themainstreetwolf/ https://twitter.com/MainStreet_Wolf Buy Bitcoin/Ethereum/Litecoin with Coinbase and get a $10 sign-up bonus: https://www.coinbase.com/join/52b282dc48b3c7569d000020 Secure your Crypto with a Hardware Wallet: Ledger: https://www.ledgerwallet.com/r/afed YOUTUBE SETUP Blue Yeti USB Microphone http://amzn.to/2jaAA2T Canon EOS Rebel SL2 DSLR Camera http://amzn.to/2zi3ruT CRYPTO DONATIONS BTC 1KCcju39gozAhcCyP25Co9QfFx3Xnyizrs ETH 0x7C3aa031E965F768EF5b7B6cD3db0C113a2419d6 LTC LVWo4Fi546X7F5Xpn1ceiDCm5cDbWeaaib Disclaimers: all opinions are my own, sponsors are acknowledged. Affiliates are: Amazon, Ledger, and Coinbase or otherwise acknowledged!
Views: 176 Main Street Wolf
Developing a blockchain with Hyperledger Composer
 
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A live demo showing the capabilities of Hyperledger Composer using the Vehicle Lifecycle Demo as a basis to understand the functions and areas that Hyperledger Composer is designed for. Presented By Dan Selman | @danielselman LINKS What is blockchain?: https://ibm.co/2vavEAm Get a free guide to getting started with blockchain: https://ibm.co/2JWvdPN Develop. Govern. Operate a blockchain network: https://ibm.co/2OjSZZi #Blockchain #Technology #Coding
Views: 31490 IBMBlockchain
Bitcoin and cryptocurrency mining explained
 
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https://www.udemy.com/blockchain-for-business-the-new-industrial-revolution/?couponCode=YOUTUBE Bitcoin and cryptocurrency mining explained with the the Byzantine Generals Problem. The Byzantine Generals problem was first introduced in a computer science paper published in 1982. The problem discussed in the paper is that reliable computer systems must be able to function effectively in the presence of faulty components that may send conflicting information to different parts of the system. This issue is even more acute when we talk about decentralized computer networks. Imagine the following thought experiment: The Byzantine army has surrounded an enemy city. The army is organized into several units. Each unit is commanded by a general and they all need to come up with a coordinated plan of action. However, they are located away from each other and the only means to communicate among themselves is via messages. To make things more complicated, one or more of the generals are possibly traitors. The presence of disloyal generals means that misleading messages could be sent aiming to disrupt any coordinated plan of action, be it attack or retreat. To find a successful solution to this conundrum, the Byzantine army needs to find its path to coordinated action, one way or another. To achieve this, the Byzantine army needs an algorithm that works effectively towards a coordinated outcome where the loyal generals follow it and the traitors don’t. Now that you are familiar with the problem, let’s see its solution. It is called the Byzantine Fault Tolerance algorithm. Over the years, there have been several proposed theoretical solutions involving game theory and math. The first practical implementation of Byzantine Fault Tolerance algorithm came with the Bitcoin’s Proof-of-Work. In this case the “generals” are nodes on the Bitcoin network, also known as “miners”. A network node is a connection point that can receive, create, store and send data across a network. In other words, nodes are the connected dots that make up a network. To simplify, think of it in the following way. In the image we traditionally use to depict a blockchain, every single computer is a separate node. They are all connected and can receive, create, store, and send data to each other. In the context of the Byzantine Fault Tolerance algorithm, the important concept to grasp is that these mining nodes start from the assumption that nobody else on the network can be trusted. Proof-of-Work secures network consensus even in the presence of non-compliant nodes. That is, even if there are some Byzantine generals who are not acting in the army’s best interest, coordinated action can still be achieved. Let’s see how this mechanism works in Bitcoin. As we all know by now, Bitcoin is a peer-to-peer network where all activities are done by its users through appropriate software and hardware. These activities include making transactions, receiving transactions, and verifying and transmitting transactions. Now, this is where we need to introduce the concept of “mining”, which many of you have probably heard. Mining is an activity, carried out by network participants, which involves Proof-of-Work and results in generating new coins as a reward for the miner who successfully did this Proof-of-Work first for each new block. On Facebook: https://www.facebook.com/365careers/ On the web: http://www.365careers.com/ On Twitter: https://twitter.com/365careers Subscribe to our channel: https://www.youtube.com/365careers
Views: 29584 365 Careers
IBM Blockchain Car Lease Demo
 
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http://ibm.biz/ibmdev-newsletter Get the Developer Webcast Calendar newsletter to learn about new videos and upcoming webcasts from IBM Developer. The video shows a sample supply chain process between multiple parties. For more information, please visit http://www.ibm.com/blockchain/for_developers.html
Views: 117055 IBM Developer
Blockchain tutorial 26: Bitcoin transaction
 
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This is part 26 of the Blockchain tutorial explaining how to make a bitcoin transaction. A real demonstration is given how to make a bitcoin transaction on the Bitcoin Testnet. This tutorial shows the following: - How to create multiple public and private bitcoin Testnet key pairs. - How to claim some bitcoins from a faucet and transfer it to a sender address. - How to make a bitcoin transaction by transferring all bitcoins from a sender address to receiver address. This tutorial also explains: - What UTXO (Unspent Transaction Output) is. - What a confirmation is. In this video series different topics will be explained which will help you to understand blockchain. Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons). After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc). Bitcoin's underlying technology is called Blockchain. The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block. Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application. New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum. Ethereum focuses on running programming code, called smart contracts, on any decentralized application. Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few. Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors. Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept. This video series tries to explain Blockchain to a large audience but from the bottom up. Keywords often used in Blockchain conversation will be explained. Each Blockchain video is short and to the point. It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier. Check out all my other Blockchain tutorial videos https://goo.gl/aMTFHU Subscribe to my YouTube channel https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html The 3 bitcoin node.js scripts can be found at: http://www.mobilefish.com/developer/nodejs/nodejs_quickguide_bitcoinjs.html The Bitcoin faucet used in this video is: https://testnet.coinfaucet.eu/en/ The Bitcoin Testnet explorer used in this video is: https://live.blockcypher.com/btc-testnet/ #mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
Views: 5665 Mobilefish.com
Building a Blockchain in Under 15 Minutes - Programmer explains
 
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I wanted to demonstrate that the concept of a blockchain that powers almost all of the modern cryptocurrencies is very simple at its core. Bitcoin, Ethereum, Litecoin etc all are based on this blockchain technology. Many people think that the blockchain is a complicated thing while at it's core its just a clever use case of hashes. Enjoy guys! CODE: https://github.com/ivan-liljeqvist/SimpleBlockchain JOIN MY EXCLUSIVE MAILING LIST FOR EVEN MORE BLOCKCHAIN KNOWLEDGE: http://eepurl.com/c0hyc9 ESSENTIAL CRYPTO RESOURCES Hardware wallets: ♥ TREZOR https://trezor.io ♥ LEDGER NANO S https://www.ledgerwallet.com/r/4607 To buy cryptocurrencies: ♥ Coinbase https://www.coinbase.com/join/529bab0ab08ded7080000019 JOIN SLACK COMMUNITY http://slack-invite-ivan-on-tech.herokuapp.com https://steemit.com/@ivanli
Views: 429587 Ivan on Tech
How accelerate free unconfirmed transaction on blockchain in hindi and urdu
 
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How accelerate free unconfirmed transaction on blockchain in hindi and urdu
Views: 1480 Knowledge World
What Bitcoin Miners Actually Do
 
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Blockchain explorers: blockchain.info, blockr.io, blockexplorer.com To do a SHA 256 on a string of text: http://www.xorbin.com/tools/sha256-hash-calculator To do a SHA 256 on a file: https://md5file.com/calculator My Medium Post that I used to make this video: https://medium.com/@TheAlexGalaxy/what-bitcoin-miners-actually-do-bc80185c0e52#.91ac9ld9h
Views: 104501 Alex Millar
Financial Transactions In Blockchain
 
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In traditional money transfer transactions for example when a person wants to transfer money to another person, he has to execute that through a middle body such as banks or any other kind of financial institutions. The financial institution act as a guaranteed factor to safeguard the transfer and guarantee the delivery of the money to the recipient against nominated fees agreed upon by both parties. Blockchain technology can perform the same functions without a medium and can take place between the sender and receiver without the intervention of another body with fewer fees and time and more secure procedure. ............................................................................................................ This video is created by iOWN Group, the investment platform of the Future. To find out more about iOWN please visit our website www.iowngroup.com Social Links: [FOLLOW] Facebook: https://www.facebook.com/iOWNToken/ Twitter: https://twitter.com/IownToken Instagram: https://www.instagram.com/iown_token/ Linkedin: https://www.linkedin.com/company/iown-group/ Telegram: https://t.me/iown_coin ............................................................................................................ PS: Don't forget to SUBSCRIBE iOWN Token for more Trusted & informative videos.
Views: 269 iOWN Token
Smart contracts - Simply Explained
 
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What are smart contracts and what do they have to do with blockchains and cryptocurrencies? Well, let's find in plain English! 💰 Want to buy Bitcoin or Ethereum? Buy for $100 and get $10 free (through my affiliate link): https://www.coinbase.com/join/59284524822a3d0b19e11134 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be 👍🏻 Like my Facebook page: https://www.facebook.com/savjee 📚 Sources can be found on my website: https://www.savjee.be/videos/simply-explained/smart-contracts/
Creating a blockchain with Javascript (Blockchain, part 1)
 
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Learn how to write your own Blockchain with JavaScript. In this video I'll show you what is behind a blockchain by using simple code. It's not a complete implementation, but enough to understand how blockchains work and how they guarantee that blocks can never be changed. After creating our blockchain we'll try and tamper with it. This will demonstrate a blockchains ability to detect fraud. Next video (implementing proof-of-work): https://youtu.be/HneatE69814 💰 Want to buy Bitcoin or Ethereum? Buy for $100 and get $10 free (through my affiliate link): https://www.coinbase.com/join/59284524822a3d0b19e11134 ► Source code Available on GitHub: https://github.com/SavjeeTutorials/SavjeeCoin ► About me 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be ✉️ Subscribe to newsletter: https://goo.gl/nueDfz 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Bitcoin Fees - How to calculate and free stuck transactions
 
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This is a complete beginner's guide to Bitcoin fees in plain English. Learn what Bitcoin fees are, how they are calculated, how to free a "stuck" transaction and more. For the complete text guide visit: http://bit.ly/2PdDmmi Join our 7-day Bitcoin crash course absolutely free: http://bit.ly/2pB4X5B Learn ANYTHING about Bitcoin and cryptocurrencies: http://bit.ly/2BVbxeF Get the latest news and prices on your phone: iOS - https://apple.co/2yf02LJ Android - http://bit.ly/2NrMVw2 See anything we haven't covered? Leave us a comment in the comment section below
Views: 4137 99Bitcoins
Talk on "The UTXO Transaction Model of Blockchain" | Bitcoin Transaction | Bitcoin Script
 
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The presentation is from my talk on "The UTXO transaction model of blockchain" given at Pramati Technology office in Chennai and was broadcasted to Hyderabad and Bangalore. https://labs.imaginea.com/post/utxo/ -------------------------------------------------------------------------------- In this talk I have discussed the following : - Overview of Blockchain (a very basic intro) - What are the transaction models? - Account and UTXO model intro - Designing data structure for UTXO transaction example - The fish transaction - Comparing that DS with the actual Bitcoin transaction. - Understanding Bitcoin scripts. - Bitcoin scripts execution on Stack. -------------------------------------------------------------------------------- Subscribe, Like or do whatever only if you understood the concept. Otherwise, drop comments with your questions.
Views: 198 Vishwas Bhushan
Transactions - Breaking Down Bitcoin Ep. 5
 
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Transactions - Breaking Down Bitcoin Ep. 5 Blockchain Reader http://srv2.yogh.io/ 4 hex dump add this to a blockchain.info transaction's URL "?format=hex" http://bitcoinfees.21.co/ The fee estimation data can be retrieved via a simple HTTP REST API, at https://bitcoinfees.21.co/api/v1/fees/recommended. For example, on the command line using the curl command: Using the fee estimation API $ curl https://bitcoinfees.21.co/api/v1/fees/recommended {"fastestFee":80,"halfHourFee":80,"hourFee":60} Donate if you feel like it ! (fees are lower on the weekends, and when sending from a Segwit address) BTC: 34T8P89oMK1Nm7eGrSWmMWhLWvAbPdiBvT
Blockchain Tutorial | Blockchain Technology | Blockchain Explained | Blockchain Training | Edureka
 
01:16:43
( Blockchain Training : https://www.edureka.co/blockchain-training ) This Edureka Blockchain Tutorial video will give you a complete fundamental understanding regarding Blockchain and Bitcoin. This video helps you to learn following topics: 1. Issues With The Current Banking System. 2. How Bitcoin Can Help Overcome These Issues? 3. Bitcoin Transaction 4. Blockchain To The Rescue 5. Blockchain Concepts 6. Blockchain Features 7. Blockchain Use Case 8. Demo: Banking Use Case Check out our Blockchain Tutorial Playlist: http://bit.ly/2PZb8fd For doubts & queries on Blockchain, post the same on Edureka Community: https://www.edureka.co/community/blockchain Subscribe to our channel to get video updates. Hit the subscribe button above. Facebook: https://www.facebook.com/edurekaIN/ Twitter: https://twitter.com/edurekain LinkedIn: https://www.linkedin.com/company/edureka #Blockchain #Blockchaintutorial #Blockchainonlinetraining #Blockchainforbeginners How it Works? 1. This is a 4 Week Instructor led Online Course, 20 hours of assignment and 20 hours of project work 2. We have a 24x7 One-on-One LIVE Technical Support to help you with any problems you might face or any clarifications you may require during the course. 3. At the end of the training you will be working on a real time project for which we will provide you a Grade and a Verifiable Certificate! - - - - - - - - - - - - - - - - - About the Course Edureka's Blockchain Course is designed to introduce you to the concept of Blockchain and explain the fundamentals of blockchain and bitcoin. Blockchain course will provide an overview of the structure and mechanism of blockchain. As a beginner, you will be learning the importance of consensus in transactions, how transactions are stored on blockchain, history of bitcoin and how to use bitcoin. Furthermore, you will be taught about the Ethereum platform and its programming language. You will setup your own private blockchain environment using Ethereum. Also, you will develop a smart contract on private Ethereum blockchain and will be deploying the contract from web and console. The course is fed with various use-cases and examples, which makes the learning more interesting. After completing this Course, you should be able to: 1. Comprehend the cryptography and cryptocurrency concepts 2. Encompass the concept of blockchain 3. Understand the importance of blockchain technology 4. Have a deep insight into bitcoin and its network 5. Perceive, how bitcoin transactions are validated by miners 6. Create and use bitcoin account effectively 7. Understand Ethereum blockchain 8. Learn Solidity: Prominent language to develop smart contracts 9. Deploy your private blockchain on web where you can visually see your chains 10. Send transactions between nodes 11. Develop more than one nodes on same blockchain 12. Making your own cryptocurrency 13. Discuss the compelling use-cases of the blockchain 14. Interpret the prospects of blockchain. 15. Assess, how blockchain can improve your business standards. ----------------------------------- Who should go for this course? Anyone having basic programming knowledge and has a zeal to learn new technology can take up the course. Students and professionals aspiring to make a career in the Blockchain technology should opt for the course. ----------------------------------- Why learn Blockchain? Blockchain is a revolutionary technology. It is an ordered back linked-list data structure of blocks of transactions stored in a decentralized peer- to-peer network. It is the underlying infrastructure for bitcoin, a popular cryptocurrency. In near future, many companies will be adopting blockchain technologies for trading publicly. Apart from bitcoin, it can be used for a wide variety of applications such as tracking ownership, digital assets, physical assets, or voting rights. It can also store and run computer code called ‘smart contracts’. However, blockchain is still new and the communities are still exploring the best ways in which it can be used. For more information, Please write back to us at [email protected] or call us at IND: 9606058406 / US: 18338555775 (toll free).
Views: 390245 edureka!
Adding Transactions to the Blockchain: Implementation - Blockchain In Rust #05: Transactions 2
 
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Cool features of the Rust language, maintaining an unspent output pool, and more in this doozy of a video! Ha. I'm not a security professional; for all practical purposes I'm a random guy on the Internet. DYOR, IANAL, RTFM, CYA, kthxbye. This video is super long because there was a heckin lotta code to write. Timestamps 00:17 Iterators 02:20 Implement: Transaction & Output 14:13 Errors in Rust 15:51 Null in Rust 16:46 Updating our Blockchain 18:31 Implement: Transaction checking 36:42 Writing a working example 37:55 Implement: Working example 42:32 First run and various testing 47:21 Notes/security concerns Links Code repo: https://github.com/GeekLaunch/blockchain-rust/tree/bc663ec59d8a2490552e5dc7d998311acf8dd305 Slides: https://geeklaunch.net/slides/Blockchain%20In%20Rust%2005.pdf Iterator: https://doc.rust-lang.org/std/iter/trait.Iterator.html Result: https://doc.rust-lang.org/std/result/enum.Result.html panic!: https://doc.rust-lang.org/std/macro.panic.html Option: https://doc.rust-lang.org/std/option/enum.Option.html http://geeklaunch.net/ Support GeekLaunch on Patreon: https://www.patreon.com/GeekLaunch Follow GeekLaunch on Twitter: https://twitter.com/Geek_Launch Not a geek? Start today!
Views: 386 GeekLaunch
Bitcoin Blockchain API Integration Example
 
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Using BlockCypher's Secure Transaction API to integrate your Web App - Work Order Example
Views: 4995 JJ BJ