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Ethereum - Getting started with Geth
 
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Getting started with Ethereums Geth
Views: 53752 Sid Harder
Intro To Geth: Create Your Private Ethereum Blockchain - in 5 mins
 
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Welcome to this introduction to Geth. In this video, we will learn about Geth, which is the most popular client for the Ethereum blockchain app platform. We will also learn how to download, install and configure Geth. Finally, we will learn to create an Ethereum account using Geth. Let’s start with a quick overview of Geth. Geth is the C L I or command line interface for running a full Ethereum node. It is implemented in the Go programming language, but does not require its users to have proficiency in Go. It is free to download and install. Geth supports most major operating systems. In this video, we will focus on the Windows version of Geth. Now let’s look at what Geth can do. Geth can be overwhelming due to its long list of commands, but for now we will focus on three key use cases. First, Geth is used to mine, in other words, to create blocks that are published to the Ethereum blockchain. The miner receives Ethereum currency or “Ether” as a reward for doing so. Secondly, Geth is used to create and manage Ethereum accounts. Accounts can store Ether. Geth also lets you transfer Ether between accounts . This transfer of Ether between accounts is known as a transaction. Lastly , Geth is used to create contracts. Contracts can receive transfers just like regular accounts. However, they can also receive more complicated transactions that run code, and optionally, update the state of the contract. In this series of videos, we will build a simple contract using Geth. Note that we will not be mining any real Ether currency in this video. We’ll need to do a couple of things before we can dive into Geth. First, download and install Geth by going to the download page on the Ethereum site. Choose the Windows 64-bit installer for version 1.5.6, which should work on most modern Windows systems. Run the installer like you would any other installer. Next, we’ve created some helper scripts to make learning Geth easy. Head over to the github URL that you see here. Click the green "clone or download" button, and select "Download zip". Unzip the zip file that is downloaded. You should see a folder called “nugget1”. We will use that folder for our first lab with Geth. Ok, let’s dive into our lab. As a prerequisite, you’ll need to be comfortable using the Windows command line. Some exposure to programming languages is helpful but not required. Now, start the Windows command line. Head into the nugget1 folder. For the purposes of this exercise, we’ll create a private blockchain. Initialize this blockchain with the “genesis block” or first block. Use the helper script genesis to do so. Now that the blockchain has been initialized, let’s create our first account. We will use the Javascript console that comes with Geth. Start this console using the helper script "console". Once the console is up and running, type “personal.new Account” to create your first account. Provide a password that you can remember. You will be asked to enter it twice. Geth responds with a long hex string that represents your account address. Congratulations! You have created your first Ethereum account on your own private Ethereum network! So let’s recap what we learned today. We learned about the key features of Geth, how to download and install it, how to start a new blockchain, and how to create an account. Stay tuned for the next video in this series! *** Note: Comments were turned off. This channel is built on spare time, and the author was unable to answer Ethereum technical questions. Please refer to Ethereum forums to resolve technical issues.
Views: 27964 RocketPrep
How To Send Ethereum Transactions
 
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How To Send Ethereum Transactions http:///www.Blockgeeks.com You can send transactions between any two accounts on Ethereum. Typically, these transactions occur in the production environment called the Mainnet but there’s also a few test networks available for us to use. Test networks are useful when you want to use Ethereum without having to pay real money. Some of the popular test nets today are Ropsten, Rinkeby and Kovan. Properly functioning test environments are a critical part of the DAPP development process. Ropsten, which is the main public network and uses proof of work has become prone to spammy transactions and slowness. In response to this, two separate community efforts led to the creation of new test nets, Rinkeby and Kovan. These networks require authenticating using your GitHub account and the transactions are validated using proof of authority meaning there are a small set of validators. Let’s try to send a transaction over the Rinkeby test net. We’ll use a Chrome plugin called MetaMask to connect to the network and make transactions. I highly recommend getting MetaMask since it makes interacting with the Ethereum blockchain extremely easy. First, we’ll change the network to Rinkeby to make sure we’re using test ether and not real ether. Let’s create two test accounts and label them. To get test ether into these accounts, we need to use a tool called a Faucet which is just a website where you enter your address and it sends you some test ether. Let’s copy the address for one of our accounts. When we click the buy button, we get redirected to the Faucet. Since we’re connected to Rinkeby, we need to use our GitHub credentials to get the test ether. To do this, go to gist.github.com, create a new Gist with a single line that contains the address you just copied and publish it. You then copy the Gist URL and paste it into the Faucet. In a few short moments, we can see that we have updated the balance in our account. The reason the balance took a few seconds to update is because we need to wait for the transaction to get mined on the Rinkeby network. Now, let’s move this test ether between our accounts. First, let’s copy the address of our receiving account. Then, we click the send button, paste the address, as well as the amount and hit submit. Once we submit the transaction, we’re provided a transaction hash which we can use to reference this transaction. If we use an Ethereum blockchain explorer like Etherscan, we can get more details about this transaction. Since we made the transaction on the Rinkeby network, we have to use rinkeby.etherscan.io and we can see that the transaction is still waiting to be mined. Once it is successfully mined, we’ll see a block number assigned to the transaction. We can then verify the updated account balances using MetaMask. To learn more about Ethereum, check out our online guides and courses at blockgeeks.com. Thanks for watching and see you next time.
Views: 5388 Blockgeeks
How to send ether
 
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How to send Ether using geth, which is still the best wallet out there.
Views: 2090 Paul Pham
How To Create Ethereum Wallet Address and Send / Receive ETH
 
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A video showing how to create an Ethereum wallet account address and access it using the myetherwallet.com platform. This video shows how to create an address, send & receive funds and backup your wallet information. My Links Website http://www.imineblocks.com Facebook https://www.facebook.com/imineblocks Twitter https://twitter.com/IMineBlocks_com Instagram https://www.instagram.com/imineblocks Steemit https://steemit.com/@imineblocks Buy anything on Amazon US http://amzn.to/1Ttb8P9 UK http://amzn.to/27P0s71 Please use the link below to make your donation in one of the 65 supported Altcoins. http://imineblocks.com/donations/ Tips are appreciated. Here's my Addresses Bitcoin:1FFVvaF7A3sjhzX26mNWfuqYKz1CwmEsYh Litecoin:LUUEfTYzsQU1e86kjiDtkwAYmqReZYAPfs Ethereum:0x5B905114167C80276AD28A997f606C698547fe40 Burstcoin BURST-N8KB-DKKW-9C4W-AF289 Storj 1PtCzyShTUXwhf63nRqQuxEgLZRkjwu4SK Dash:XmVpjUbZ12bK4k8E2LnMJeULeUsLcjAyBe BitSend:iRoCVCDSVTyqqojyybMcbRpFU4HhdosVhP Decred:DseJxmrkYw3FncKWJoEH9SswdcDPuyi4DZF Ethereum Classic:0x0927B3ff51BFC3865788aE7ad90246D850c05325 Nexus:2QyTKoWw38qhXZ144gvDuxcMPunquV4o2CLxFTHa4vBUkj1m4Sh NXT:NXT-VJTM-6E5M-7PZ6-9LSXJ Stratis:ST6bqKBoGtvtrVnStDjiGkcfh29KhZDMmw Vertcoin:VkzcFB4qpWta6txy7kjfx6z2pS4VhmmhCn Zcash:t1QAirDg9e9Gyz1YzWFXvBenjyRQq5iYyxi Monero:48CbEcFkNVEd2JyZCTW4erduVKsbBEkwd9n791ayUQjVDx12yc3oZjqbV2NaqdSSXa3NcnpZdDCYZSQ92DpoSztY8xqRkuw
Views: 98356 IMineBlocks
Deploying A Smart Contract To The Ethereum Blockchain w/ Mist
 
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Ethereum is a blockchain platform that supports smart contracts. Smart contracts are just tiny programs (a set of rules) written in the solidity programming language that can get pushed on the Ethereum blockchain, and get executed as necessary. In this "Hello World" example, we look at a very basic Ethereum Smart Contract to create our own token. We install Ethereum Mist/Wallet on our computer and use it as the way to deploy our contract onto the blockchain. We then look at how the contract is able to be used after it gets pushed onto the blockchain. Link to webpage: https://www.srcmake.com/home/ethereum-wallet-solidity-introduction Blockchain Explained In 10 Minutes: https://www.youtube.com/edit?o=U&video_id=5PtorjX9qKo Twitter: https://twitter.com/srcmake Twitch: https://www.twitch.tv/srcmake Discord: https://discord.gg/q5vAET3
Views: 500 srcmake
Ultimate Intro to Ethereum Ðapp Development [Part 6] - Sending Transactions with Code
 
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Video Notes: https://gist.github.com/AlwaysBCoding/1102f81636ecf76fe7fd348804e3f00c This is Part 6 of a 24 part screencast series outlining everything you need to know in order to get started building Ðapps in Ethereum. The series covers creating an Ethereum development environment, how to use various Javascript libraries to interact with the Ethereum protocol, simple ways to send transactions to the main Ethereum network, how to write and test smart contracts, how to run your own Ethereum node, how to mine Ether, adventures into undergraduate computer science, and more. These videos were recorded in November 2016, so some of the information might be slightly dated. Crypto Donation Links: BTC: 1HewuvpGP1fwprdcg2yru5ss28tGCo4wg8 ETH: 0xC46CDe805aCC8e7507E53E36486C7D8600559d65 XMR: 42HvHqtwg2dcZqDfLZjK8Xc8LyFKN7i3XCipbVSFDJLVGsdUN5pT3e7LExz9QTaGzdGdrEohXzvkeFmdZK1MPGX92xqftUn
Views: 2478 Decypher Media
How to sync Ethereum Mist quickly (using Geth)
 
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Going through it really quick. You'll need to pause the video. How to sync Ethereum Mist wallet quickly (using Geth)
Views: 17819 GBG Glenn
Develop and Test a Payable Ethereum Smartcontract
 
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This is my implementation of a fair Lottery System. This simple (non-production) code is meant for educational purposes, hope you guys find it useful. This code actually withdraws and deposits ether from your wallet as it uses the payable modifiers from solidity. Here is the github URL: https://github.com/chrisvugrinec/blockchain-lab
Views: 384 chris Vugrinec
How to move Ethereum to the Ledger Nano S Wallet
 
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Here's a step by step process on how to move Ethereum to your Ledger Nano S Wallet. Before asking a question, please see if anyone has posted the question in the comments. Please use my referral links: Coinbase Exchange: https://www.coinbase.com/join/593e067... (you and I get $10 when you invest $100 or more) Binance Exchange: https://www.binance.com/?ref=12781632 Ledger Nano S: http://amzn.to/2ysuRdW Ledger Nano S Direct: https://www.ledgerwallet.com/r/8d09 If you are feeling generous, please send BTC: 17wTqesDhBaqH8D43BnYYUw9EmDC9HcBp2 As of December 28, 2017: 1 ETH = $723.11 on GDAX Please share this video on Ethereum / Ledger forums on Facebook and Reddit so it can help other newbies. How Wallets Work: https://blockchain.info/wallet/how-it-works BIP39 SEEDS Ledger devices work following BIP39 blockchain protocol, so it manages a seed that generates your private keys and your wallets. This way to generate and backup your wallets is not a Ledger specificity, it is a well-known secure standard, which makes your Ledger device compatible with the other BIP39 wallets. https://ledger.zendesk.com/hc/en-us/articles/115005161325-Backup-24-words-seed-and-compatible-seeds https://medium.com/@trionkidnapper/ledger-nano-s-restoring-a-device-using-recovery-phrase-d80051ecf17a Get Started: https://www.ledgerwallet.com/start Is it safe to keep coins on an exchange? https://www.quora.com/Is-it-safe-to-leave-Ethereum-coins-in-Coinbase Top Exchange Hacks: http://cryptorials.io/5-biggest-bitcoin-exchange-hacks/ Follow me: Twitter: @garycruz Steemit: https://steemit.com/@garycruz
Views: 11171 Gary Cruz
Solidity Tutorials- Transfer or Send Ether- Transfer(), send() and call() functions in solidity
 
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How to transfer or send the funds-ether in solidity. Introduction of transfer, call and send function in solidity. http://tutorialsdiary.com/solidity-tutorials-how-to-send-ethers-transfer-send-call-function/ How to call contract function from another contract in solidity. http://tutorialsdiary.com/solidity-tutorials-function-calls/ What is constructor in solidity. http://tutorialsdiary.com/constructor-in-solidity/ Low level logging in solidity http://tutorialsdiary.com/low-level-logging-solidity/ Abstract Contract in Solidity http://tutorialsdiary.com/abstract-contract-in-solidity/ Interface in Solidity http://tutorialsdiary.com/interface-in-solidity/ Error handling in Soldity http://tutorialsdiary.com/error-handling-in-solidity/ Inheritance in Solidity http://tutorialsdiary.com/inheritance-in-solidity/
Views: 101 Tutorials Diary
Ethereum Mist Wallet - How to fix when blockchain won't sync up
 
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A video showing how to fix a stuck wallet. Use this method if your Ethereum wallet is stuck and a block and won't download the blockchain. . Buy anything on Amazon US http://amzn.to/1Ttb8P9 UK http://amzn.to/27P0s71 Tips are appreciated. Here's my Addresses Bitcoin 12v4d15AuopsVzudct7J8LJMm7qH95SxA1 Ethereum 0x5B905114167C80276AD28A997f606C698547fe40
Views: 43011 IMineBlocks
How to install Ethereum and Mist with Fast Sync + Add EtherDelta and ENS
 
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In this video i show you the complete walkthrough on how to install the Ethereum core wallet and the Mist Browser. I also show you how to add the EtherDelta exchange and the ENS domain register into Mist. 1. Download Ethereum and Mist - Navigate to https://github.com/ethereum/mist/releases Download your version 2. Download Geth - Navigate to https://geth.ethereum.org/downloads/ your version 3. Install all 3 above - Time 2:30 4. Open the Ethereum folder and rename the Chaindata folder - Time 5:11 5. Open your CMD window by typing cmd in the start menu. - Time 6:18 6. Navigate to where you installed Geth, normally found - C:\Program Files\Geth and drag the geth.exe into your CMD window. 7. Type: space then --fast then another space then --cache=512 . So it will look like this: --fast --cache=512 then hit enter. - Time 6:40 8. Wait until wallet syncs and opens. - Time 11:56 9. Create an account or import your Keystore files to automatically create accounts. 9. Connect EtherDelta https://etherdelta.github.io - Time 16:10 10. Connect ENS Domain service. https://registrar.ens.domains/ - Time 18:20 IMPORTANT: Errors you may encounter - Time 9:40 Feel free to leave comments with questions and I will do my best to help you.
Views: 11710 Crypto is Key
Frontend Web Applications On Ethereum 3 - Sending Tokens | Blockchain
 
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The full code for this lesson is located here: https://github.com/what-the-func/func-wallet/tree/frontend-ethereum-part3 In this video we continue working on the Func Wallet example from the previous video. We're now able to view basic wallet information and our Ether and Token balances. The next step is implementing the "Send Tokens" component. Remix - Solidity IDE - https://remix.ethereum.org Solidity Documentation - https://solidity.readthedocs.io/en/develop/ ERC20 Standard - https://github.com/ethereum/eips/issues/20 EthereumJS TestRPC - https://github.com/ethereumjs/testrpc Web3JS - http://web3js.readthedocs.io/en/1.0/ Check out my other videos and articles http://edzynda.com Follow me on Steemit https://steemit.com/@edzynda 💎►Donate Ether and Ethereum-Based (ERC-20) Tokens 0x146cfed833cc926b16b0da9257e8a281c2add9f3 💎►Donate Bitcoin 1KyZbSeeCWgmeRrUQTTbb3meJEyPCGy3zd 💎►Donate Dash XoZdSzN3hPFksQQZx616A6fGGN22zANpMW 💎►Donate Lisk 16883042352161362207L 💎►Donate IOTA SRZWULMJI9WJFVWDIVXXMVWHVVJAKMAXKMFOINQGEZXNJYLRSHPXBE9PHQDUVIRESEUZSYJBGGKLBMEYIJOKIOIXBU
Views: 4207 What The Func?
Transfer Ether Using Golang
 
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In this video I go over how to create a raw Ethereum transaction and send Ether using Go. ► SUBSCRIBE TO THIS CHANNEL ◄ For more videos on how to build cool things for the web and blockchain: https://www.youtube.com/c/whatthefunc ► CHECK OUT MY OTHER CHANNEL ◄ https://www.youtube.com/channel/UCkPCE3Idxj79mtAkFjkpvMg Donate Ether to the channel: 0x146cfed833cc926b16b0da9257e8a281c2add9f3 Website: https://what-the-func.com Follow me on Twitter (@what_the_func): https://twitter.com/what_the_func Email me: [email protected]
Views: 213 What The Func?
Ethereum Wallet Move BlockChain To External Drive
 
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Move Ethereum Wallet and Blockchain to external drive
Views: 687 freelanceTEK.com
Deploying a private Ethereum blockchain to Microsoft Azure Cloud
 
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This video demonstrates the automated provisioning of all necessary Microsoft Azure resources like VMs, storage, network settings etc. as well as the configuration of Go Ethereum (geth) and accounts. It also stands up an administration website to monitor the nodes in the network and provide ether to new accounts. https://github.com/Azure/azure-quickstart-templates/tree/master/ethereum-consortium-blockchain-network
Views: 12878 Patrick Lismore
web3.js library, the Ethereum JavaScript API
 
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This video explains what the purpose is of the web3.js library and how to use it. The web3.js library is also known as the Ethereum JavaScript API. To communicate with an Ethereum node or transact with a smart contract deployed on the blockchain from inside a JavaScript or web application you can use the web3.js library. Under the hood the web3.js library communicates with an Ethereum node through JSON RPC calls. The Ethereum node must expose its a RPC layer. The MetaMask extension exposes the web3 API by an injected web3 object which you can access via JavaScript. The MetaMask extension does not support most synchronous web3 API methods. Make your method calls asynchronous! To use the web3.js library in your web application: - Download the web3.js library from: https://github.com/ethereum/web3.js - In the dist folder you will find the files web3-light.min.js and web3.min.js - The file web3.min.js contains the Bignumber module and the file web3-light.min.js does not. If you do not know which one to choose, then use file web3.min.js. Web3.js API code examples can be found at: http://www.mobilefish.com/download/ethereum/web3api.html In the examples asynchronous methods were used if they are available. The demonstration Ethereum Dapp is made for educational purpose. The web interface can be found at: http://www.mobilefish.com/download/ethereum/DemoDapp.html The associated Solidity contract can be found at: http://www.mobilefish.com/download/ethereum/DemoContract.sol.txt The main purpose of this Dapp is to learn how to use web3.js api (v0.x.x) and how interact with a deployed smart contract. To setup the demonstration Ethereum Dapp (DemoApp.html): - Download and deploy the DemoContract.sol smart contract on any test network (testrpc, ropsten, rinkeby, or your own private ethereum node, etc). Save the contract address you will need it later. - Download and install the DemoApp.html on your web server. - Download and install the web3.min.js (v0.19.0) on your web server. - Modify the path to web3.min.js in the DemoApp.html file. - Modify the contract address in the DemoApp.html file. How to use the demonstration Ethereum Dapp (DemoApp.html): - Use a test network. - Have a test account with enough ethers to experiment with. - The demonstration Dapp (DemoApp.html) also works well with MetaMask. Notes: Two versions of DemoApp.html has been created. - A version using callbacks which is not very readable because of using callback trees! For educational purpose you can find this version at (but do not use it!): http://www.mobilefish.com/download/ethereum/DemoDappv0.1.html - The original code has been refactored by using JavaScript Promises. http://www.mobilefish.com/download/ethereum/DemoDapp.html - The DemoApp.html uses only vanilla JavaScript an uses the web3.js library. All code meaning: JavaScript, HTML and CSS can be found in this single web page. Warnings: - The DemoApp.html does not work with the web3.js v1.0.0. - The web3.js library v1.0.0 has many changes. The DemoApp.html will soon be obsolete. - Use the Demonstration Ethereum Dapp on a test environment. Check out all my other Ethereum related tutorial videos: https://goo.gl/eNJVXe 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_ethereum_related_tutorials.html The DemoContract.sol used in the video: http://www.mobilefish.com/download/ethereum/DemoContract.sol.txt To interact with the DemoContract.sol use the demonstration Ethereum Dapp (using Javascript Promises): http://www.mobilefish.com/download/ethereum/DemoDapp.html An older version of the demonstration Ethereum Dapp (do not use this): http://www.mobilefish.com/download/ethereum/DemoDappv0.1.html More information about RPC layer can be found at: https://youtu.be/oOfDzXBXoOg The web3.js library can be found at: https://github.com/ethereum/web3.js The web3.js API v0.x.x can be found at: https://github.com/ethereum/wiki/wiki/JavaScript-API The web3.js API v1.0 can be found at: http://web3js.readthedocs.io/en/1.0/ MetaMask web3 API can be found at: https://github.com/MetaMask/faq/blob/master/DEVELOPERS.md #mobilefish #howto #ethereum
Views: 14989 Mobilefish.com
How to Transfer Money with the Ethereum Mist Browser
 
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http://www.transitionfoundation.org
Views: 3955 ThomasJulianMiller
Ether Transfer and Mining Demonstration
 
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Demonstration of ether transfer and data block mining on private Ethereum blockchain network.
How To Convert Ethereum To Real Money.
 
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In this video i show you how to turn your ethereum into real money on your bank.
Ethereum gas, gas limit, gas price
 
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This video explains what Ethereum gas is and why you need to specify a gas limit and gas price when you make a transaction. When a solidity contract is compiled it is converted into a sequence of operation codes also known as opcodes. Opcodes are referenced by their mnemonic names such as ADD (for addition) or MUL (for multiplication). All opcodes and their descriptions are available in the Ethereum yellow paper: https://ethereum.github.io/yellowpaper/paper.pdf Side note: Byte codes are similar to opcodes but are represented by hexidecimal numbers. The Ethereum Virtual Machine (EVM) executes the byte codes. Each opcode has a fixed amount of gas assigned and is a measure of computational effort. For example ADD requires 3 gas units, calculating SHA256 requires 60 gas units. Gas is the execution fee, paid by the sender of the transaction that triggered the computation. By default the minimum gas limit for all transactions = 21000 gas Sending ether from one account to another = 21000 gas Interacting with a smart contract = 21000 gas + all executed opcodes gas For users it is impossible to know how much gas a transaction will actual require. When executing a transaction a user can specify the maximum amount of gas it is willing to spend on the transaction. This can be done in the gas limit field. If the transaction is executed but is exceeds the gas limit, all changes are reversed but the user will still have to pay for performed computation, which is the gas limit. If the transaction is executed but requires less gas than the gas limit, the user will only pay for the actual gas used. It is not recommended to specify a large gas limit. If you interact with a smart contract and the contract contains a bug you may exceed your gas limit. Total fee = the total amount of gas used x gas price The gas price is not fixed. The user decides which gas price it is willing to pay in Gwei/gas. The mainnet current gas price and block gas limit can be found at: https://ethstats.net The rinkeby testnet current gas price and block gas limit can be found at: https://www.rinkeby.io Miners prefers transactions with a higher fee. Transactions with a lower fee will take longer to be included in a block. Side note: A block also has a gas limit field. It defines the maximum amount of gas all transactions in the block combined are allowed to consume. This block gas limit determines the maximum number of transactions within the block. This block gas limit is not fixed. The block gas limit is set by miners. If the block gas limit is increased more transaction fees they get, but the more bandwidth and computing they would have to do. Check out all my other Ethereum related tutorial videos: https://goo.gl/eNJVXe 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_ethereum_related_tutorials.html The DemoContract.sol used in the video: http://www.mobilefish.com/download/ethereum/DemoContract.sol.txt To interact with the DemoContract.sol use the demonstration Ethereum Dapp (using Javascript Promises): http://www.mobilefish.com/download/ethereum/DemoDapp.html #mobilefish #howto #ethereum
Views: 20001 Mobilefish.com
4 How to invoke your first smart contract from the geth console (ABI)  - Ethereum from scratch
 
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Welcome to part 4 of my Ethereum from scratch series. In the previous video we showed how to create and deploy your first smart contract on your local private test network and this week we take it one step further and copy the ABI (application binary interface) from the browser compile window and access the contract by address directly from the geth console itself. I explain the concepts of contract residing AT an address on the blockchain which is a foreign concept in bitcoin. Main steps below ******************* copy the contents from the "interface" box in the browser-solidity window ***************** ensure geth console is started geth --datadir "(dir)" --nodiscover --rpc --rpcport "8545" --rpccorsdomain "*" console 2 &gt console.log ********************************* type var abi = (paste the interface code from the browser) ********************************* copy the address of the deployed smart contract from the browser - where is says "at 0x...." INCLUDING the 0x type var address = "(paste the address here)" ************************ type var myContract = eth.contract(abi).at(address) *********************** eth.defaultAccount=eth.accounts[0] Otherwise WRITE operation's won't work ************************* now you can invoke the functions on the contract from the console Note you have to ensure there is a miner running for the non-readonly functions - since the state-changes have to mined into transaction blocks
Views: 8107 Matt Thomas
HOW TO: Use MetaMask Ethereum Wallet (In Under 5 Minutes)
 
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YOU ASKED AND I LISTENED! NEW METAMASK VIDEO WITH A LOT MORE DETAIL: https://youtu.be/-uJjfn4wizE MetaMask is a very easy to use Ethereum Wallet that's built into your Chrome browser as an extension! It's perfect for buying into ICOs or doing quick and easy transactions. In this video I show you around the entire interface, how to send and adjust gas limit/price, how to view tokens, create new accounts and more! Please give it a watch and let me know if you have any questions! Also I would love to hear any other tutorials you'd like to see in the crypto space! ******************************************** Hey everyone, thanks for watching. If you enjoyed this video please give me a LIKE and SUBSCRIBE to catch all my future content. If you want to sign up for various exchanges, you can use my referral code for bonuses: Coinbase/GDAX: https://www.coinbase.com/join/5925a6f5f35ce600bcd082d2 Binance: https://www.binance.com/?ref=11165323 Also be sure to check out our communities: Facebook (Main Group): https://www.facebook.com/groups/cryptoforbeginners/ Facebook (Mining): https://www.facebook.com/groups/miningforbeginners/ Facebook (ICOs): https://www.facebook.com/groups/icoforbeginners/ Steemit: https://steemit.com/@btcforbeginners Instagram: https://www.instagram.com/btcforbeginners/ Twitter: https://twitter.com/btcforbeginners/
Views: 94143 Bitcoin for Beginners
Create Ethereum Private Blockchain in less than 30 minutes!
 
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Develop Ethereum Private Blockchain in less than 30 minutes. You 1. Install Go-Ethereum (geth) client. 2. Create two EOA Accounts. 3. Create Genesis File 4. Seed private blockchain network with genesis block 5. Mine new blocks 6. Check balance to your account
How to Restore or Recover Your Ethereum Wallet
 
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The Crypto Dad shows you how to restore or recover your Ethereum wallet. There are certain standard locations where your wallet data and blockchain data are stored. We go through the folder locations to see if they are still there. We also go through the import wallet process that can recover an Ethereum wallet account. We show how you can look for and locate your Ethereum account files on your computer or backup drives. Etereum Project Home page: https://electrum.org/#home Software verification is done with: MD5 & SHA Checksum Utility https://raylin.wordpress.com/downloads/md5-sha-1-checksum-utility/ Donate Bitcoin: 1JBxwXG8P6PYKKsrHKzQduM8s8RoV3dnjr
Views: 11276 Rex Kneisley
Blockchain Wallet Now Lets You Send/Receive Ether (Ethereum)
 
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Blockchain Wallet Now Lets You Send/Receive Ethereum Get $10 free using my coinbase link to buy bitcoin/ether: http://kenetralinks.com/coinbase This is very cool for Blockchain wallet users. They will probably add more crypto in the future. #Blockchainwallet #Ethereum #Ethereum wallet #Ethertransfer #Ether wallet #Buy ethereum
Views: 925 CashFlow Queen
Learning Solidity : Tutorial 32 Transferring ether with Java using web3j
 
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Homepage of solidity : https://solidity.readthedocs.io/en/develop/ Remix : http://remix.ethereum.org Source code : https://github.com/willitscale/learning-solidity If you would like to donate some Ethereum my wallet is: 0xC8c8c3Fae80e3eD236970e1C93AcF5B91D0993e2 Many thanks! Web3j Documentation : https://docs.web3j.io/ Web3j command line client : https://github.com/web3j/web3j/releases/tag/v3.6.0 Solidity compiler : https://github.com/ethereum/solidity/releases
Views: 764 Will it Scale
How To Move Default Ethereum BlockChain Folder To Another Drive Location
 
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My SSD was running out of space partly due to the ever increasing size of the blockchain data stored on it. I decided to move my Ethereum folder and its 40GB blockchain to a new location and in this video I show the whole process. My Links Website http://www.imineblocks.com Facebook https://www.facebook.com/imineblocks Twitter https://twitter.com/IMineBlocks_com Instagram https://www.instagram.com/imineblocks Steemit https://steemit.com/@imineblocks Buy anything on Amazon US http://amzn.to/1Ttb8P9 UK http://amzn.to/27P0s71 Please use the link below to make your donation in one of the 65 supported Altcoins. http://imineblocks.com/donations/ Tips are appreciated. Here's my Addresses Bitcoin:1FFVvaF7A3sjhzX26mNWfuqYKz1CwmEsYh Litecoin:LUUEfTYzsQU1e86kjiDtkwAYmqReZYAPfs Ethereum:0x5B905114167C80276AD28A997f606C698547fe40 Burstcoin BURST-N8KB-DKKW-9C4W-AF289 Storj 1PtCzyShTUXwhf63nRqQuxEgLZRkjwu4SK Dash:XmVpjUbZ12bK4k8E2LnMJeULeUsLcjAyBe BitSend:iRoCVCDSVTyqqojyybMcbRpFU4HhdosVhP Decred:DseJxmrkYw3FncKWJoEH9SswdcDPuyi4DZF Ethereum Classic:0x0927B3ff51BFC3865788aE7ad90246D850c05325 Nexus:2QyTKoWw38qhXZ144gvDuxcMPunquV4o2CLxFTHa4vBUkj1m4Sh NXT:NXT-VJTM-6E5M-7PZ6-9LSXJ Stratis:ST6bqKBoGtvtrVnStDjiGkcfh29KhZDMmw Vertcoin:VkzcFB4qpWta6txy7kjfx6z2pS4VhmmhCn Zcash:t1QAirDg9e9Gyz1YzWFXvBenjyRQq5iYyxi Monero:48CbEcFkNVEd2JyZCTW4erduVKsbBEkwd9n791ayUQjVDx12yc3oZjqbV2NaqdSSXa3NcnpZdDCYZSQ92DpoSztY8xqRkuw
Views: 21839 IMineBlocks
Set up a private Ethereum node on Windows
 
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This lesson is part of our "Become a Blockchain Developer with Ethereum and Solidity" online course on Udemy. Go to https://www.udemy.com/getting-started-with-ethereum-solidity-development/?couponCode=YOUTUBE to learn what to do with this node.
Views: 1088 ChainSkills
How To set Ethereum Account Using Geth for OX Fina ICO
 
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How To set Geth
Views: 335 OX
Set up a private Ethereum node on Linux
 
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This lesson is part of our "Become a Blockchain Developer with Ethereum and Solidity" online course on Udemy. Go to https://www.udemy.com/getting-started-with-ethereum-solidity-development/?couponCode=YOUTUBE to learn what to do with this node.
Views: 659 ChainSkills
How to store tokens on safe to Mist wallet
 
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If you buy tokens on ICO or on some of exchanges you probably asked your self where to store them on safe place? Best place to do that for ERC-20 tokens based on Ethereum is Mist wallet. This is tutorial how to move tokens to Mist wallet. -~-~~-~~~-~~-~- Please watch: "Making money with lending platforms - ICO that has fast ROI return on investment" https://www.youtube.com/watch?v=i_JSSl7LPek -~-~~-~~~-~~-~-
Views: 2846 Blockchain Talks
Create account, set coinbase, get balance, send transaction | Gubiq Windows
 
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In this second video in the tutorial series, we explore the following: 1. Launching gubiq in testnet mode 2. Creating a new account 3. Setting the coinbase address (where you mine funds to) 4. Retrieving a balance from your accounts 5. Sending your first transaction All of the longer commands used in this video are listed below: Creating an account: personal.newAccount() Setting coinbase: web3.miner.setEtherbase(web3.eth.accounts[0]) Retrieving balance: web3.fromWei(eth.getBalance(eth.coinbase), "ether") Sending a transaction: eth.sendTransaction({from: eth.coinbase, to: "0xaddresshere", value: web3.toWei(1, "ether")})
Views: 2857 Ubiq Videos
6 Ethereum Gas, price, limit explained (demo)  - Ethereum from scratch
 
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In this video I go through the entire concept of gas, and the link between gas and ether - and to show how transactions consume gas. I explain how each block has an upper limit on the total gas of all the transactions inside it.
Views: 13216 Matt Thomas
How to Check Your Ethereum Token Balance
 
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Check out the tool at http://www.proofsuite.com/tokenbalance. Have feedback or wanna contribute to our community? Join us on slack at http://slack.proofsuite.com
Views: 3211 Proof Suite
How to Resolve ETH Not Received to Ethereum Mist Wallet
 
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https://www.myetherwallet.com/ Follow the instructions at the above link if you are downloaded the Mist wallet and tried to load ETH from Coinbase and another exchange and it will not sync the block to load up your ETH.
Views: 448 Joshua Fausset
Ethereum Mist Wallet fast syncing | Ethereum Mist Wallet: Schnelle Synchronisierung mit geth
 
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Der Ethereum Mist Wallet kann ziemlich nerven, denn er synchronisiert die Ethereum Blockchain nur extrem langsam. Aber es gibt einen Trick, wie man die Synchronisationsprobleme von dem Mist Wallet umgehen kann. Dafür müsst Ihr nur mit der Kommandozeile umgehen. Viele mag das anfangs vielleicht abschrecken, da das zu kompliziert scheint. Ist es aber nicht! Folgt dieser Schritt für Schritt Anleitung, die euch genau sagt, was Ihr tun müsst, um den Mist Wallet zu synchronisieren. Jeder Mist Wallet enthält eine geth.exe. Wenn Ihr den Wallet unter Downloads gespeichert habt, dann wandert Ihr mit der Kommandozeile zu den Downloads, dann in den Mist Wallet Ordner und zu dem Ort, an dem sich die geth.exe befindet. Ihr sucht also den Pfad zur geth.exe. (Tipp: Über den Befehl "dir" seht Ihr eine Übersicht der Ordner) Falls euch das Video gefallen und geholfen hat, dann freue ich mich über einen Daumen auf Youtube oder einen Kommentar.
Views: 7400 Coincierge
Getting Started with Parity Ethereum Wallet (Faster Sync than Geth Mist)
 
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A video tutorial showing how to get started with the Parity Node and Ethereum wallet. In this video I show you the basics of using the Parity Ethereum wallet and browser interface. Installation 0:00 Ethereum Wallet Creation 2:40 Sending a Transaction 9:00 Features 11:10 Import Ethereum Wallets from Geth 13:45 My Links Website http://www.imineblocks.com Facebook https://www.facebook.com/imineblocks Twitter https://twitter.com/IMineBlocks_com Instagram https://www.instagram.com/imineblocks Steemit https://steemit.com/@imineblocks Buy anything on Amazon US http://amzn.to/1Ttb8P9 UK http://amzn.to/27P0s71 Please use the link below to make your donation in one of the 65 supported Altcoins. http://imineblocks.com/donations/ Tips are appreciated. Here's my Addresses Bitcoin:1FFVvaF7A3sjhzX26mNWfuqYKz1CwmEsYh Litecoin:LUUEfTYzsQU1e86kjiDtkwAYmqReZYAPfs Ethereum:0x5B905114167C80276AD28A997f606C698547fe40 Burstcoin BURST-N8KB-DKKW-9C4W-AF289 Storj 1PtCzyShTUXwhf63nRqQuxEgLZRkjwu4SK Dash:XmVpjUbZ12bK4k8E2LnMJeULeUsLcjAyBe BitSend:iRoCVCDSVTyqqojyybMcbRpFU4HhdosVhP Decred:DseJxmrkYw3FncKWJoEH9SswdcDPuyi4DZF Ethereum Classic:0x0927B3ff51BFC3865788aE7ad90246D850c05325 Nexus:2QyTKoWw38qhXZ144gvDuxcMPunquV4o2CLxFTHa4vBUkj1m4Sh NXT:NXT-VJTM-6E5M-7PZ6-9LSXJ Stratis:ST6bqKBoGtvtrVnStDjiGkcfh29KhZDMmw Vertcoin:VkzcFB4qpWta6txy7kjfx6z2pS4VhmmhCn Zcash:t1QAirDg9e9Gyz1YzWFXvBenjyRQq5iYyxi Monero:48CbEcFkNVEd2JyZCTW4erduVKsbBEkwd9n791ayUQjVDx12yc3oZjqbV2NaqdSSXa3NcnpZdDCYZSQ92DpoSztY8xqRkuw
Views: 7066 IMineBlocks
Ethereum Mist Wallet
 
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Please subscribe to my Channel: https://www.youtube.com/channel/UCp2H... Facebook: https://www.facebook.com/MrCluster87-... Donate Ether: 0x28F1EB784C072B4A4EB38924d5087dd13Fa487f5 Donate Bitcoin: 38G865NSNjzLca4Lt67BPqdMiAyJGxLYeo ChangeTip me: https://www.changetip.com/send-tips/ Donate NXT: NXT-ZNYS-CQE8-ECSA-3FRHR Donate BTCD: bDtewFRcLkir2cf9SRPyPTYQug8DyF6xfi Website: https://www.ethereum.org/ Homestead: http://ethereum-homestead.readthedocs.org/en/latest/introduction/the-homestead-release.html Mist: https://github.com/ethereum/mist/releases Ether Scripter: http://etherscripter.com/0-4-0/ Help us caption & translate this video! http://amara.org/v/IDQc/
Views: 5425 MrCluster87
How to get Ether refund from DAO
 
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How to get your ethereum back after the hard for, using Ethereum Wallet http://pastebin.com/5UaV6dBv 1) Watch MainDAO contract Name: MainDAO Address: 0xbb9bc244d798123fde783fcc1c72d3bb8c189413 JSON: [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_amount","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"type":"function"},{"constant":true,"inputs":[],"name":"standard","outputs":[{"name":"","type":"string"}],"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_amount","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_owner","type":"address"},{"indexed":true,"name":"_spender","type":"address"},{"indexed":false,"name":"_amount","type":"uint256"}],"name":"Approval","type":"event"}] 2) Get DAO balance Address: 0xYOUR_ETHEREUM_ACCOUNT Balance: __________________ 3) Approve transfer Address: 0xbf4ed7b27f1d666546e30d74d50d173d20bca754 Balance: __________________ 4) Watch WithdrawDAO contract Name: WithdrawDAO Address: 0xbf4ed7b27f1d666546e30d74d50d173d20bca754 JSON: [{"constant":false,"inputs":[],"name":"trusteeWithdraw","outputs":[],"type":"function"},{"constant":false,"inputs":[],"name":"withdraw","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"mainDAO","outputs":[{"name":"","type":"address"}],"type":"function"},{"constant":true,"inputs":[],"name":"trustee","outputs":[{"name":"","type":"address"}],"type":"function"}] 5) Call withdraw()
Views: 3995 Filmed in Mexico
How to Install ethereum wallet easiest method without downloading entire blockchain
 
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Setting up Ethereum mist wallet in Light mode without downloading the entire blockchain which takes days to download. Created the video as simple and fast as possible for professionals and Noobs. If you have any doubts, please leave in the comment section. Thank you :) Links for the downloads and websites in the video Ethereum and mist wallet download link - https://github.com/ethereum/mist/releases Geth download link - https://geth.ethereum.org/downloads/ Etherscan link - https://etherscan.io/txs (only for PC) Mobile devices - https://etherscan.io/blocks
Views: 221 Smart Tech
How to access Default Account and Settings on Azure Consortium Ethereum and transfer Ether
 
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In this tutorial it simply describes how to access Azure Ethereum Consortium and do Transactions. Besides that I introduce you Metamask Ethereum Digital Wallet.
Blockchain Tutorial #17 - How To Setup A Mist Wallet For Ethereum
 
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Learn more at: 1. Follow us on Twitter: @dennilovejoy | @heytaizen | @leoncfu 2. Subscribe To Our Newsletter at: https://cryptocurrency.market/newsletter 3. Get your copy of the Cryptocurrency Investing Blueprint™ at: https://cryptocurrency.market/blueprint Get 10% off the blueprint using promo code: denni2018 4. Attend the next Cryptocurrency Investing Bootcamp™ at: https://cryptocurrency.market/bootcamp
Purelab — Private Ethereum Blockchain
 
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Setup a Private Ethereum Blockchain Cluster with 2 nodes at DigitalOcean by Docker Sources: https://github.com/purelabio/docker-ethereum
Views: 265 Yury Egorenkov
How To Send 0 Ethereum (ETH) To A Contract Address Using MyEtherWallet | OMi Shah
 
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How To Send 0 Ethereum (ETH) To A Contract Address Using MyEtherWallet by OMi Shah ** DO NOT SHARE YOUR PRIVATE KEY ELSE YOU WILL LOSE YOUR FUNDS ** ----------- Join Our Telegram Channel http://mycryptohub.in Follow me on: Facebook - https://www.facebook.com/iOMiShah Twitter - https://twitter.com/iOMiShah Instagram - https://www.instagram.com/iOMiShah ---- Like - Subscribe - Share
Views: 1111 OMi Shah
Set up your development environment for Ethereum on a Linux machine
 
15:12
This video is part of the "Become a Blockchain Developer with Ethereum and Solidity" online course on Udemy. If you want to learn more about how to use those tools on a real project, go to https://www.udemy.com/getting-started-with-ethereum-solidity-development/?couponCode=YOUTUBE
Views: 988 ChainSkills
Ethereum Application based on PoA consensus
 
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This Demo video demonstrate that my learning process in blockchain. I establish a simple demo application on Ethereum with PoA consensus. In the front end, offline transaction is utilize in this application. Firstly, before support our bank, you have to upload your keystore file. Second, the support or transfer function will be activated after you upload your key file. After each transaction, you can see log information on the right side of the page. Frontend : web3.js, materialize backend: Node.js Ethereum : Geth, Truffle, Clique
Views: 37 耿楷寗
Bittrex ETH wallet not synced to Ethereum Blockchain???
 
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12 Hours later and my ETH still hasn't arrived from Coinbase to Bittrex?? Me thinks Bittrex wallet has issues, just be mindful guys. ————— Don’t delay people, you are still early adopter’s! BUY BITCOIN TODAY!! JOIN THE DISCORD SERVER HERE! https://discord.gg/y2rg4dM If you appreciate what I do, and want to help me stay working at this full time, then please consider supporting the channel on Patreon. If a few of you give 2 dollars a month then I’ll be able to scrap the computer business and stay in this 100%!! https://www.patreon.com/kryptographyk Buy a LEDGER NANO S and keep your crypto safe, I CANNOT STRESS THIS ENOUGH!! https://www.ledgerwallet.com/r/5823 For Australians hoping for a quick and easy way to buy a whole lot of different cryptos for AUD, check out CoinSpot here: (JUST MAKE SURE TO SELL THE COINS FROM WITHIN THE SITE AND TRANSFER AUD OUT OF YOUR ACCOUNT TO AVOID FEES). https://www.coinspot.com.au/?affiliate=PY3UY Otherwise for a simpler alternative, or if you’re in another country, choose COINBASE here: https://www.coinbase.com/join/5984653832cc4f01c75e2fe6 But please be aware you will have to send the coins to another exchange like Bittrex to be able to buy other Alt-Coins. CoinMama is another option to buy Bitcoin with a VISA or MASTERCARD and a great way to get around Coinbase’s initial tiny weekly limits. COINBASE AND EVERYWHERE ELSE IS CONGESTED RIGHT NOW AS WELL SO THESE GUYS COULD BE ANOTHER OPTION FOR YOU. https://www.coinmama.com/?ref=kryptographyk If you want to buy IOTA, please do so at Bitfinex, (personally I do most of my trading at Bittrex but I LOVE Bitfinex’s charts! https://www.bitfinex.com/?refcode=ReJfeWj8aP NOTE: BITFINEX ALSO NOT ACCEPTING NEW ACCOUNTS UNTIL 15TH JANUARY, ANOTHER OPTION IS cex.io: https://cex.io/r/0/up115089862/0/ USE CODE: DMt2e0 with ANY purchase for an instant 3% discount with GENESIS MINING. https://www.genesis-mining.com/ (This is for those who are INTENT on trying cloud mining, believe me, Genesis are best in the biz!)
Views: 720 Kryptographyk

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