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Ethereum Transfer

Ether Paper Wallet Tutorial - Step By Step Instructions

Ether Paper Wallet Tutorial - Step By Step Instructions

You should create an Ether Paper Wallet, before you start buying or mining Ether. An Ether Paper Wallet is just like an ordinary wallet which is printed on paper. It might sound weird at first, however, it is the safest method to store your Ether. The fact that, your Ether can be stored at your house, at the bank in a locker box or in a cookie box buried behind your house, is an important advantage of the Paper Wallets, if compared to an Online Wallet. The Paper Wallet is not part of the Internet. No hacker can gain access to your precious Ether. Unless, he would find your cookie box behind your house. A disadvantage of the Paper Wallet is the fact that, the availability of the Ether is belayed as the Ether has to be transferred back to the Online Wallet before it can be used. The use of the Ether Wallets always depends on what you want to use them for. If you want to trade your Ether at the stock market and benefit from price fluctuation, the Ether has to be ready to use in your Online Wallet in order to act quickly. If you want to go with a long-term rise in the market instead, you can keep your Ether safely in your Paper Wallet until you need them and then transfer them online. By the way, Paper Wallets are an excellent extraordinary present. Just put enought Ether in them. We use MyEtherWallet , a client-based Open-Source JavaScript-Application. This is a web page where you can check the way this service works and therefore increase the safety. In the following, we will show you the main functions: How much Ether is available on my Ether Wallet? 2. Choose a password for the encryption of the JSON file: Enter a safe password in the field. We recommend a combination of at least 15 characters of capital and lower case letters, special characters and numbers. Take a no Continue reading >>

How To Send A Transaction

How To Send A Transaction

You can now send that token as well as see it's balance in the sidebar. You can also click the "Send Entire Balance" link if you would like the transfer the entire balance. Click "Generate Transaction". A couple more fields will appear. This is your browser generating the transaction. Click the blue "Send Transaction" button below that. A pop-up will appear. Double-check the amount, type of coin, and the address are correct. Click "Yes, I am sure! Make transaction." button. The transaction will be submitted. The TX ID will display. You can click that TX ID to see it on the blockchain. Just as a reminder, any transaction that you make will require Gas which is paid in Ether. It is a transaction fee that is paid to the miners as an incentive to include your transactions in the blocks that they mine. For more information about Gas, please click here . During busy network times, please read here for more information . as to why your transaction is taking forever to get broadcasted onto the network. Continue reading >>

Coinbase Bug Allows User To Transfer Unlimited Ethereum To Wallet

Coinbase Bug Allows User To Transfer Unlimited Ethereum To Wallet

Coinbase Bug allows User to Transfer Unlimited Ethereum to Wallet Coinbase, one of the worlds most popular cryptocurrency exchanges, has had a nasty bug lurking in its system that would allow users to collect unlimited ether through a few simple steps. Thanks to a bug report, however, the company avoided disaster. A Dutch FinTech company, VI Company , publicly disclosed a Coinbase bug on March 20. According to the vulnerability report, a custom built smart contract with a string of digital wallets could be manipulated into tricking Coinbase algorithms that a transfer had taken place. The Ethereum blockchain is deemed in some ways superior to Bitcoin s due to its usage of smart contracts. For non-specialists, a smart contract is a set of if/then conditions regulating the transfer of an underlying asset/fund/security. To build familiarity with smart contracts amongst its employees, VI Company initiated a unique Christmas present in 2017. The smart contract would reward employees with a small amount of ether as means of festive Bonus on Christmas. However, the company noticed a bug. In a smart contract, in case one of the internal transactions of the contract failed, all the transactions would be reversed, which is how the smart contract should work. But employees with knowledge of the project found out that Coinbases internal accounts didnt register the reversal. Hence, the Coinbase software thought that wallet had been credited with additional ether, but in reality, the wallet would have no deposit made. A screenshot of its transactions was made available to the public by VI Company, which also outlined the steps which allowed for an unlimited amount of ETH to be credited : Setup a smart contract with a few valid Coinbase wallets and [one] final faulty wallet, Transfer Continue reading >>

3 Simple Ways To Buy Ethereum Instantly - A Complete Beginner's Guide

3 Simple Ways To Buy Ethereum Instantly - A Complete Beginner's Guide

Last updated on December 14th, 2017 at 08:16 am Note:If youre looking to buy Ethereumfor trading purposes only you may want to check out Plus500 Ethereum CFD trading. Keep in mind that when trading CFDs your capital is at risk. Lately there has been a lot of talk about the hottestaltcoin in the community Ethereum. Ethereum is a cryptocurrency and a blockchain platform with smart contract functionality. Its basically a decentralized platform for developers to build apps on top of and it was invented by Vitalik Buterin in 2013. Ethereum can be used to codify, decentralized, secure and trade just about anything: voting, domain names, financial exchanges, crowdfunding, company governance, contracts and agreements of most kind, intellectual property. Well, Ether is the currency of the Etherium platform. Etherwill be required by anyone wishing to build upon oruse the Ethereum platform. Just like BItcoin, Ether can be traded around the web and mined. In a second Ill show you exactly where you can buy it. Most people use the term Ethereum to refer to the currency instead of Ether and thats why it can get so confusing. The total supply of ether and its rate of issuance was decided by the donations gathered on the 2014 presale of the currency. The results were roughly: 60 million ether created to contributors of the presale 12 Million (20% of the above) were created to the development fund, most of it going to early contributors and developers and the remaining to the Ethereum Foundation 5 ethers are created every block (roughly 15-17 seconds) to the miner of the block 2-3 ethers are sometimes sent to another miner if they were also able to find a solution but his block wasnt included (called uncle/aunt reward) The founders of Ethereum state that Ether is not a currency as much Continue reading >>

Erc865: Pay Transfers In Tokens Instead Of Gas, In One Transaction #865

Erc865: Pay Transfers In Tokens Instead Of Gas, In One Transaction #865

Wouldn't a way simpler solution be to have contracts set gasprice & startgas so miners are allowed to take gas from the contracts balance? Then nodes/miners would use limited gas per transaction to determine if these transactions are mineable at all (gas price is high enough) and warrant to be re-broadcast over the network. In other words, nodes/miners are executing the code of transactions (where the sender doesn't have enough funds themselves), and which contain 'gasprice & startgas'-opcodes. Contracts can then convert tokens to gas themselves. Basically wallets would allow users to set gasprice & startgas in the used token, and the contract converts that to ETH. Or if the contract is rather predictable in gas usage make it even easier for users by allowing users to only set gasprice. Right, we need to pass it, but it doesn't have to be encoded. Good catch Letting the first person to get a transaction in harvest the fee Using msg.gas price makes sense, but we should probably come up with another name, since "gas price" is usually in wei. Concerning the naming of the methods, what would you think of prefixing the methods with "delegated", instead of suffixing with "presign", for insisting on the fact that someone else is bringing the transaction on chain? Concerning the direction, we probably want to open a pull request on Open Zeppelin (cc @spalladino ). Would it work with the constraints of your licence? I have been working on this idea for a side-project, the pay-protocol . This feature is something that can be achieved in a layer 2 protocol rather than adding this functionality to every token contract. Which also has the ability that every token currently deployed could use it, just by having people that want to use this create a ERC20 allowance to the PayProtocol Continue reading >>

How To Transfer Bitcoin, Ether & More From Coinbase To Binance Smartphones :: Gadget Hacks

How To Transfer Bitcoin, Ether & More From Coinbase To Binance Smartphones :: Gadget Hacks

The most convenient way for US users to buy Ripple (XRP) or Stellar (XRM) is through Binance . However, you can't deposit money directly into this app, but you can deposit cryptocurrency like ether or bitcoins to buy other alt-coins. The easiest way to do that is by using Coinbase , the most popular cryptocurrency app. Despite some delays in transaction times and freezes on new registrations, this combination of Coinbase and Binance has proven to be quite dependable. Binance in particular, has the added benefit of letting you trade with both Bitcoin (BTC) and Ethereum (ETH) as base currencies, which means you have more options not only in trading, but also in terms of choosing between digital coins based on faster transaction times and lower network fees. Don't Miss: How to Install the Binance App on Your iPhone You can transfer Bitcoin (BTC), Bitcoin Cash (BCH), Ethereum (ETH), or Litecoin (LTC) from Coinbase to Binance, but I'll demonstrate using LTC. The bulk of the process will be the same regardless of which coin you choose, but note that if you transfer BCH or LTC from Coinbase, you'll have to convert them into BTC, ETH, or Binance Coin (BNB) to trade the coins on Binance. Step 1: Find Your Source Wallet in Coinbase To start, you'll need to select the wallet that you'll be transferring coins out of. There are three ways to access your wallet in Coinbase either tap on the coin's chart, select "Accounts" at the bottom of the screen, or tap "Your Accounts" above the coin's chart. Tapping on a coin's chart will take you directly to its landing page, complete with a graph showing its price movements this week. From there, open that coin's specific wallet page by selecting the "LTC Wallet" tab (for example) right below the "Buy" and "Sell" buttons. Tapping on "Accounts Continue reading >>

How To Do An Ethereum Transaction, & Check Your Balance? | Cryptocompare.com

How To Do An Ethereum Transaction, & Check Your Balance? | Cryptocompare.com

How to make an Ethereum Transaction, & check your balance? Once you have managed to set up an Ethereum Miner using either your GPU or your CPU its time to start checking your balance and start trading. Were going to show you how you can check your balance in Command Prompt, how to convert between all the different values of Ether , such as the base unit Wei, and how to make your first transaction! Once you have set up your miner via running the Geth program and Ethminer program (see our guide here on how to get started), you need to open up a third Command Prompt Window. Step 1: This can be done by right clicking on the command prompt in the taskbar at the bottom of your screen and then clicking on the command prompt that appears at the top of the menu. A third command prompt should now be open. Step 2: You now need to tell this Command Prompt where to look to get up and running. Usually the command Prompt window opens looking at your user profile. If this is the case you need to tell Command Prompt to go to wherever you installed geth. In our guide we installed it straight on the C Drive so we need to tell command prompt to get back to the C Drive which we do by typing in cd C:\ and pressing enter. Step 3: You then need to tell Command Prompt what to do. In this case you need to tell it to attach to Geth. So all you type in is geth attach which should look like this C:/>geth attach and then press enter. You now have a console up and running talking to geth so you can start asking it questions or telling it to do things. Remember for"geth attach" to work you need to have anotherCommand Prompt Window runningwith "geth --rpc". If you want to find out your address you type in eth.coinbase. This should look like this C:/>eth.coinbase. Press enter and you should see your ad Continue reading >>

How Do I Send Bitcoin Or Ethereum?

How Do I Send Bitcoin Or Ethereum?

Once you have digital currency such as Bitcoin or Ethereum in your Luno wallet, you can easily send it to others. There are three ways to send digital currencies using Luno: Sending it to someone's email address or mobile number (Bitcoin only) Sending to a wallet address, email address or mobile number Select which digital currency you want to send (Bitcoin or Ethereum) Enter the wallet address, email or mobile number to which you want to send Review the transaction, enter your PIN or two-factor authentication code (if necessary, depending on your device and settings) and confirm You can see your transaction history by navigating to MENU Transactions. The recipient's wallet might take a while to show the transaction Sending Bitcoin to someone with a Luno wallet using their email address or mobile number makes the transaction instant and free (if they dont have a Luno account, theyll be asked to create one) For security reasons, amounts exceeding 10 BTC or 20 ETH arent sent immediately. See the manual send schedule to see when your transfer will be completed. This is a convenient way to pay using your Luno wallet, without the need to enter the recipient's wallet address. Its ideal when sending from a mobile device using the Luno mobile app. Review the details and confirm the transaction What are the fees for sending Bitcoin and Ethereum? There is a dynamic fee when you send Bitcoin or Ethereum, which is based on the blockchain network activity at that time. Well display it to you before you confirm the send transaction. Weve published a blog article in which we discuss the reasons behind our fee structure. More information about send fees can be found here . Remember, sending Bitcoin to an email address or mobile number is instant and free. Continue reading >>

How To Transfer Ethereum To My Ledger? Where Can I Find My Ethereum Address?

How To Transfer Ethereum To My Ledger? Where Can I Find My Ethereum Address?

How to transfer Ethereum to my Ledger? where can I find my Ethereum address? Ethereum and Ethereum Classic can be managed with Ledger Nano S and Ledger Blue.Nano and HW.1 only support Bitcoin. If your device is not initialized go to and follow instructions. To manage your ETH or ETC, you must launch the Ledger Wallet Ethereum Chrome application. If you didn't install it yet, this is the way to do it:in your Chrome browser, install the application here . Tofind your Ethereum address(required to receive a payment), Open the Ethereum application on your device Set "Browser support" to "NO" (disable this setting) Launch your Ethereum Chrome applicationon your computer Select ETH if you want to manage Ethereum or ETC if you want to manage Ethereum Classic Click on the down arrow (receive), a popup opens Copy the HEX address which is displayed(or the Iban / Icap) Paste this address where you are required to (in the Ethereum wallet or exchange service from where you need to send coins to your Ledger wallet) While receiving payments, your Ledger device can be disconnected as your transactions are tracked on the Blockchain. These transactions will be synchronized on your wallet when you open it. Please note that your Ledger device supports Ethereum derived tokens, but you can't manage them with the Ledger Wallet application, you must manage them through MyEtherWallet Continue reading >>

Ether Transfer | Ethereum Frontier Guide

Ether Transfer | Ethereum Frontier Guide

Assuming the account you are using as sender has sufficient funds, sending ether couldn't be easier. Which is also why you should probably be careful with this! You have been warned. eth.sendTransaction({from: '0x036a03fc47084741f83938296a1c8ef67f6e34fa', to: '0xa8ade7feab1ece71446bed25fa0cf6745c19c3d5', value: web3.toWei(1, "ether")}) Note the unit conversion in the value field. Transaction values are expressed in weis, the most granular units of value. If you want to use some other unit (like ether in the example above), use the function web3.toWei for conversion. Also, be advised that the amount debited from the source account will be slightly larger than that credited to the target account, which is what has been specified. The difference is a small transaction fee, discussed in more detail later. Contracts can receive transfers just like externally controlled accounts, but they can also receive more complicated transactions that actually run (parts of) their code and update their state. In order to understand those transactions, a rudimentary understanding of contracts is required. Continue reading >>

Erc20 Token Standard

Erc20 Token Standard

The ERC20 token standard describes the functions and events that an Ethereum token contract has to implement. Following is an interface contract declaring the required functions and events to meet the ERC20 standard: 1 // 2 contract ERC20 { 3 function totalSupply() constant returns (uint totalSupply); 4 function balanceOf(address _owner) constant returns (uint balance); 5 function transfer(address _to, uint _value) returns (bool success); 6 function transferFrom(address _from, address _to, uint _value) returns (bool success); 7 function approve(address _spender, uint _value) returns (bool success); 8 function allowance(address _owner, address _spender) constant returns (uint remaining); 9 event Transfer(address indexed _from, address indexed _to, uint _value);10 event Approval(address indexed _owner, address indexed _spender, uint _value);11 } Most of the major tokens on the Ethereum blockchain are ERC20-compliant. The GNT Golem Network Token is only partially-ERC20-compliant as it does not implement the approve(...), allowance(..) and transferFrom(...) functions, and the Approval(...) event. Some of the tokens include further information describing the token contract: 1 string public constant name = "Token Name";2 string public constant symbol = "SYM";3 uint8 public constant decimals = 18; // 18 is the most common number of decimal places Following is a fragment of a token contract to demonstrate how a token contract maintains the token balance of Ethereum accounts: 1 contract TokenContractFragment { 2 3 // Balances for each account 4 mapping(address => uint256) balances; 5 6 // Owner of account approves the transfer of an amount to another account 7 mapping(address => mapping (address => uint256)) allowed; 8 9 // What is the balance of a particular account?10 functio Continue reading >>

Eidoo Your Blockchain Asset Experience Ethereum

Eidoo Your Blockchain Asset Experience Ethereum

Eidoo is a blockchain-to-human interface simplifying the interaction between the Ethereum and Bitcoin blockchains and its users. We are proposing Eidoo as a new blockchain asset experience providing an easy and secure way to buy, transfer, spend, and exchange cryptocurrencies without relying on any central authority. Ethereum is revolutionizing the blockchain concept by introducing the possibility to write and certify smart contracts on each single node of the network. This design provides flexibility to blockchain uses that go far beyond the simple transactions of Ether (ETH, or the main digital currency that runs on the Ethereum blockchain). In addition to the ability to execute and certify smart contracts, the Ethereum blockchain offers the possibility to create and manage new assets. These assets are actually smart contracts based on the standard known as ERC 20. Presently, it is not possible to assign unique names and symbols to Ethereum tokens: tokens can be created havingthe same name or symbol to other pre-existing tokens. This is a considerable problem for a simple and secure use of digital currency wallets because while each token has a different Ethereum address, the human eye is unable to handle complex alphanumeric codes with ease, hence each token must be recognized with a name,an abbreviation, and a symbol Eidoo implements a special index that will group together tokens issued by companies having both legal and/or informal statute, and legitimate tokens. Tokens having names/abbreviations/symbols equal to those in this special index are labeled by Eidoo as untrusted in order to avoid scams and misunderstandings. Eidoo is, therefore and first of all, a multicurrency wallet designed for the mobile world, a single integrated environment that manages all toke Continue reading >>

Ethereum

Ethereum "gas" - How It Works

Understanding how gas works is crucial for Ethereum users interested in participating in ICOs, using smart contracts, and even making simple transfers between wallets. In this post, I hope to explain what gas is and how it works. Skip to the end for a simple summary of things. To start off, we need to understand some basics about the Ethereum Virtual Machine. The Ethereum Virtual Machine (EVM) is a major part of the Ethereum ecosystem, but I'll be heavily glossing over this so we can focus on how it relates to gas. In short, the EVM is an environment where arbitrary code of smart contracts and other operations can be executed. Every node in the Ethereum network executes operations within the EVM to ensure redundantly correct execution and relies on consensus to agree on the answer. All transactions, from simple transfers to ICO smart contracts, require some amount of operations to perform. Each of these operations has an associated cost in gas. Thus, simple transactions like transfers will require less gas to perform than more intense smart contracts. For example, a simple operation like if(var > 1) may cost 1 gas, but a more complex operation to store a variable could cost 100 gas. The cumulative sum of all the operations is the total gas cost for the transaction. When on a site like MyEtherWallet, you're going to see a field called Gas Limit. This corresponds the the MAXIMUM amount of gas you are willing to spend on the transaction. Different types of transactions will require different amounts of gas to complete Providing too little gas will result in a failed transaction, the fees are kept by the miner Extra, unspent gas is refunded automatically What happens if I specify too little gas? Your transaction will start to be executed, but will eventually run out of gas Continue reading >>

The Ethereum Token Standards You Need Toknow

The Ethereum Token Standards You Need Toknow

ERC stands for Ethereum Request for Comment. This is Ethereums version of a Request for Comments (RFC), a concept devised by the Internet Engineering Task Force . Memos within an RFC contain technical and organizational notes. For ERCs, this includes some technical guidelines for the buildout of the Ethereum network. This was written by Ethereum developers for the Ethereum community. Thus, the workflow of generating an ERC includes a developer. To create standards for the Ethereum platform, a developer submits an Ethereum Improvement Proposal (EIP). This includes protocol specifications and contract standards. Once that EIP is approved by a committee and finalized, it becomes an ERC. The complete list of EIPs can be found here . The finalized EIPs give the Ethereum developers a set of implementable standards. This allows Smart Contracts to be built with these standards, which a common interface can access. ERC-20 is the most well-known of all the standards within the entire crypto community, and most tokens issued on top of the Ethereum platform use it. The ERC-20 standard includes the following functions: totalSupply(): returns total token supply balanceOf(address _owner): returns account balance of _owners account transfer(address _to, uint256 _value): takes in number _value and transfers that amount of tokens to address _to and triggers transfer event transferFrom(address _from, address _to, uint256 _value): transfers _value amount of tokens from the address _from to the address _to, and triggers the transfer event approve(address _spender, uint256 _value): allows _spender to withdraw any number up to _value amount allowance(address _owner, address _spender): returns the amount which the_spender is still allowed to withdraw from the _owner The following events are t Continue reading >>

How To Transfer Ethereum To A Ledger Nano S Step-by-step 2018

How To Transfer Ethereum To A Ledger Nano S Step-by-step 2018

ceos3c 2200 Views 2 Comments ethereum , how to transfer ethereum to a ledger nano S , ledger , myetherwallet I wasnt able to find a thorough step-by-step guide on how to transfer Ethereum to a Ledger Nano S, so Ill create one.If you dont already have a Ledger Nano S , you should consider getting one, to be able to safely store your currency ! I highly recommend using Coinbase and Binance as a beginner. If you use my Coinbase link to sign up with them, you will receive free 10$ worth of Bitcoin directly to your new account! After you went through the initial configuration process , unlock your Ledger Nano S with your PIN. By the time of writing this article, the Ethereum App comes pre-installed in the Ledger. Select the Ethereum App on your Ledger by using one of the top buttons and press both buttons at the same time to enter your Ethereum App. After that, use one of the buttons again until you find , press both buttons again to enter Settings. Now find and switch it to . 2. Connecting the Ledger with Myetherwallet Alright, now that our Ledger is ready, we are going to use Myetherwallet to connect to our Ledger. You have to use Chrome Browser for this to work. Open Chrome and head to Myetherwallet , always make sure you are on the correct URL. Once you are on Myetherwallet, check if the connection is secure, indicated by the green lock next to the URL. Now you have to select Ledger Wallet on the left and click on Connect on the right. Now your Wallet will pop open and first you select ETH in your HD derivation path. Next, you have to select one of your wallet addresses. The Ledger comes pre-configured with 5 ETH addresses. It doesnt matter which one you choose. We go with the first one. After you choose one, click on Unlock your Wallet. And there you go, Continue reading >>

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