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Ethereum Rinkeby Wallet

How To Get On Rinkeby Testnet In Less Than 10 Minutes

How To Get On Rinkeby Testnet In Less Than 10 Minutes

How to get on Rinkeby Testnet in less than 10 minutes Following instructions from the excellent A full node lets you access all state.There is a light node (state-on-demand) and wallet-only (no state) instructions as well,and these are even faster. I'm using this for dapp development, so I want access to all state. A full node synchronizes the blockchain by downloading the full chain from the genesis block to the current head block,but does not execute the transactions. Instead, it downloads all the transactions receipts along with the entire recent state.As the node downloads the recent state directly, historical data can only be queried from that block onward.Initial processing required to synchronize is more bandwidth intensive, but is light on the CPU and has significantly reduceddisk requirements. Mid range machines with HDD storage, decent CPUs and 4GB+ RAM should be enough. First, install the latest geth (1.7.3) to your machine. For Ubuntu, you can follow the instructions on the official wiki. sudo apt-get install software-properties-commonsudo add-apt-repository -y ppa:ethereum/ethereumsudo apt-get updatesudo apt-get install ethereum If you're just upgrade geth from a previous version,you can just run If you're downloading this to your Mac,you'll need to download the packages manually to get the latest(1.7.3) release. Extract it and copy the geth binary to somewhere in your path. # ppham @ Pauls-Air-2 in ~/Downloads [21:46:25]$ tar zxvf geth-darwin-amd64-1.7.3-4bb3c89d.tar.gzx geth-darwin-amd64-1.7.3-4bb3c89d/x geth-darwin-amd64-1.7.3-4bb3c89d/COPYINGx geth-darwin-amd64-1.7.3-4bb3c89d/geth# ppham @ Pauls-Air-2 in ~/Downloads [21:46:39]$ sudo mv geth-darwin-amd64-1.7.3-4bb3c89d/geth /usr/local/bin/geth For older releases on Mac OSX,you can use Homebrew to instal Continue reading >>

Rinkeby: Authenticated Faucet

Rinkeby: Authenticated Faucet

This Ether faucet is running on the Rinkeby network. To prevent malicious actors from exhausting all available funds or accumulating enough Ether to mount long running spam attacks, requests are tied to common 3rd party social network accounts. Anyone having a Twitter, Google+ or Facebook account may request funds within the permitted limits. To request funds via Twitter, make a tweet with your Ethereum address pasted into the contents (surrounding text doesn't matter). Copy-paste the tweets URL into the above input box and fire away! To request funds via Google Plus, publish a new public post with your Ethereum address embedded into the content (surrounding text doesn't matter). Copy-paste the posts URL into the above input box and fire away! To request funds via Facebook, publish a new public post with your Ethereum address embedded into the content (surrounding text doesn't matter). Copy-paste the posts URL into the above input box and fire away! You can track the current pending requests below the input field to see how much you have to wait until your turn comes. The faucet is running invisible reCaptcha protection against bots. Continue reading >>

Ropsten To Kovan To Rinkeby: Ethereums Testnet Troubles

Ropsten To Kovan To Rinkeby: Ethereums Testnet Troubles

Ropsten To Kovan To Rinkeby: Ethereums Testnet Troubles Ethereums Ropsten testnet was suffering from a spam attack that was slowing down block times significantly. This led to the birth of the Parity-only Kovan testnet and the proposal of the cross-client Rinkeby testnet. Ethereums Morden testnet ran from July 2015 to November 2016. While anyone using Ethereum can create a testnet, Morden was the first official public testnet. Due to long sync times stemming from a bloated blockchain, and consensus issues between the Geth and Parity clients, the testnet was rebooted and reborn as Ropsten. Ropsten ran smoothly as the public testnet until the end of February 2017. According to Pter Szilgyi, a core developer for Ethereum, the end of February is when malicious actors decided to abuse the low PoW and gradually inflate the block gas limits to 9 billion (from the normal 4.7 million), at which point sending in gigantic transactions crippling the entire network. Even before that, attackers attempted multiple extremely long reorgs, causing network splits between different clients, and even different versions. These attacks were able to propagate because a network that reaches consensus via a Proof-of-Work algorithm is only as secure as the computing power behind it. It was this low level of difficulty that allowed the attacker to spam the testnet. Since Ropsten was a testnet, its Ether had no financial value, so its likely the attacker only sought to disrupt the development of upcoming Ethereum projects. The Parity team ( Ethcore ) came up with an emergency solution: the Kovan testnet. Kovan is a stable, public testnet for Ethereum, powered by Paritys Proof-of-Authority consensus algorithm. Ethcores testnet is immune to spam attacks because the Ether supply is controlled by trus Continue reading >>

How To Send Ethereum With Web3.js And Node

How To Send Ethereum With Web3.js And Node

How to Send Ethereum with Web3.js and Node How to Send Ethereum with Web3.js and Node Ethereum took the web and cryptocurrency world by storm in 2017. In the span of one year, the price of 1 Ether skyrocketed from $8.24 USD to $750.00 USD and for good reason. If you need convincing on the nature of decentralization, just watch this video featuring Ethereum founder Vitalik Buterin and AngelList CEO Naval Ravikant and come back in 30 minutes. However, if youve found this article, Im guessing youre already a believer and want to learn more about interacting with the Ethereum main network. In my case, I wanted to find a way to programmatically send amounts of Ether between different addresses based on external factors (think IFTTT for sending cryptocurrency.) Whatever your reasoning, in this article, were going to go over how to use Node.js and the quickly-evolving Web3.js library to submit ETH transactions to the Ethereum network. Well start off with test transactions first to learn the basics and make sure everything is working as expected. Then, once youre comfortable, we can flip the switch and move real ETH around the Ethereum mainnet. Theres a lot to learn here, especially if youre new to this space like I am, so Ill try to break down the terms to the best of my understanding. Lets get started! Were going to get started using some test Ether rather than actual money while were learning about this whole process, so the first thing well need to do is create a new Ethereum wallet address that will be able to hold our test funds. To do this, first visit Next, open up the dropdown at the top right corner and change the Network selection to Rinkeby infura.io. This change will make sure that the new wallet address that we are creating is going to exist on the Ethereum test Continue reading >>

Fishbank - Blockchain Game Based On Ethereum Smart Contracts - Grow, Fight And Trade Crypto Fish In Deep Blue Decentralized Ocean

Fishbank - Blockchain Game Based On Ethereum Smart Contracts - Grow, Fight And Trade Crypto Fish In Deep Blue Decentralized Ocean

After you have your MetaMask digital wallet installed please make sure you have some Ether on it to conver transactions costs. If you don't have Ether (ETH, Ethereum network cryptocurrency) you can get one on Coinbase for fiat money or exchange on Shapeshipt for Bitcoins or any other cryptocurrency. Fishbank Alpha is running in Rinkeby testnet that allows anyone to test it using free Ether. Just follow these steps: 1) Switch your MetaMask wallet to Rinkeby Test Network as shown on the left. 2) Get some test Ether for free from Rinkeby Faucet 3) Go to and enter desired nickname and your e-maill address to sign up for Fishbank Alpha. Fishbank Alpha represents just the part of Stable version functionality and may contain serious bugs. Play at your won risk! Please join our community to share your feedback and help us make the game better! Fishbank allows to collect, attack, grow and trade unique cryptographic fish tokens. Every action in Fishbank game is a transaction in Ethereum blockchain signed by your wallet private key. That requires a gas (Ethereum network kind of fuel) to be implemented in block and is in fact a miner reward. That makes sure that every fish token you have is 100% owned by you, cannot be transfered, dimilished or removed by someone else while you keep private keys and the password from your wallet in a safe place. All the tokens are securely stored in Ethereum blockchain confirmed by the distributed immutable database it is publicly available to check on the evey blockchain node. Build your army of fish tokens to attack others in deep blue decentralized ocean and gain part of their weight. The core parameter of fish token is the weight which defines its size and influence. Fish is able to gain weight by hunting others taking bites off losers. The ma Continue reading >>

Ether - How Do I

Ether - How Do I "buy" Tokens On The Rinkeby (test) Environment? - Ethereum Stack Exchange

You only need to go to this page and for example tweet the following: Requesting faucet funds into 0x***YOU_ADDRESS***************** on the #Rinkeby #Ethereum test network. Then, copy-paste the link of you tweet into the faucet page and select the amount of ether you want. After a few seconds, you should receive the fund. This Ether faucet is running on the Rinkeby network. To prevent malicious actors from exhausting all available funds or accumulating enough Ether to mount long running spam attacks, requests are tied to common 3rd party social network accounts. Anyone having a Twitter, Google+ or Facebook account may request funds within the permitted limits. To request funds via Twitter, make a tweet with your Ethereum address pasted into the contents (surrounding text doesn't matter). Copy-paste the tweets URL into the above input box and fire away!To request funds via Google Plus, publish a new public post with your Ethereum address embedded into the content (surrounding text doesn't matter). Copy-paste the posts URL into the above input box and fire away!To request funds via Facebook, publish a new public post with your Ethereum address embedded into the content (surrounding text doesn't matter). Copy-paste the posts URL into the above input box and fire away! You can track the current pending requests below the input field to see how much you have to wait until your turn comes. The faucet is running invisible reCaptcha protection against bots. Continue reading >>

Geth 1.7 - Megara - Ethereum Blog

Geth 1.7 - Megara - Ethereum Blog

The Go Ethereum team is proud to announce the next release family of Geth, the first incarnation focusing on laying the groundwork for the upcoming Metropolis hard forks (Byzantium and Constantinople), consisting of 125+ code contributions forvarious parts of the project. The current incarnation of Geth contains all the Byzantium EIPs implemented and also features the fork block number 1,700,000 for the Ropsten testnet transition. The block numbers for Rinkeby and the main Ethereum network will be finalized when Ropsten is deemed stable. You can find details about individual protocol updates at the following locations: EIP 98 : Removal of intermediate state roots from receipts ( #14750 ). Expanded by EIP 658 : Embedding transaction return data in receipts ( #15014 ). EIP 100 : Change difficulty adjustment to target mean block time including uncles ( #14733 ). EIP 214 (116) : Expanding the EVM with static contract calls ( #14978 ). EIP 211 : Expanding the EVM with dynamically sized return data ( #14981 ). EIP 206 (140) : Expanding the EVM with cheap state revertals ( #14983 ). EIP 649 : Delaying the difficulty bomb and reducing the block reward ( #15028 ). EIP 684 : Preventing overwriting contracts (Byzantium prep) ( #15039 ). Aside from the Byzantium hard fork, the 1.7 release series of Geth is aimed to focus primarily on performance improvements. The first release of the family already packs a heavy punch with two database schema modifications resulting in significant optimizations: Transaction and receipt storage was completely reworked, cutting the data storage requirements of a fast synced node in half, from 26.3GB to 14.9GB at the time of the implementation ( #14801 ). EVM log storage and indexing was completely reworked, cutting the filtering time of the entire c Continue reading >>

How To Deploy An Erc20 Token In 20 Minutes

How To Deploy An Erc20 Token In 20 Minutes

How to deploy an ERC20 token in 20 minutes Ethereum tokens are all the rage these days. These tokens can represent units ofvalue in the real world: Gold , Whoppers , Kittens and even something similar to sharesof acompany .People have raised over $2 billion in token sales thus far. These tokens havebeen standardized in the ERC20 standard so they can be easily traded between wallets. In thistutorial Im going to walk you through deploying your own ERC20 token to thelive Ethereum network. A basic text editor. ( Atom is good. I like Vim ) A basic understanding of the command line and a terminal emulator. The builtin mac app Terminal should be fine. I like iTerm2 A name for your token. Mine is going to be called HamburgerCoin The first thing youll need to do is install MetaMask .Go to the Metamask website and click on Get Chrome Extention. Metamask will allow you to make transactions on Ethereum through Chrome. Theyrely on Infura who run public Ethereum nodes so you donthave to. If youre feeling adventurous you could download and install Mist instead. When you run Mistyoure running your own Ethereum node. If you run your own node youll have tosync the network to your computer which can take a while. Thatstechnically safer because you dont have to trust Infura with yourtransactions. Infura could censor your transactions by just ignoring them but they wouldnt be ableto steal your money. Since installing Metamask is quicker and simpler thanrunning Mist Im going to assume were using Metamask for the rest of thetutorial. Now create a new directory for your new coin, CD into it and initialize yourtruffle project. $ mkdir hamburger-coin$ cd hamburger-coin$ truffle init Congrats your truffle project is now set up! Now lets create our coin. First well need to install the OpenZepplin Continue reading >>

Smart Contracts For The Impatient

Smart Contracts For The Impatient

Ive been learning about Ethereum and smart contracts, and one of thebiggest issues Ive found is the lack of documentation to do somebasic things. In this article I want to do the dumbest contract possible, which kindof resembles our first program ever: Hello World. Run Mist using the testnet Rinkeby and get free ether for testing. Deploy a contract and interact with it using Mist. For easiness, Ill assume people is using macOS. To get started we need to install Mist, from the README: The Mist browser is the tool of choice to browse and use apps. It not only works as a browser, but also allow us to create wallets and contracts. We can downloading it from . Once it is installed, dont bother yet about setting a wallet. Since we dont want to run on the default testnet or main network, weneed to install geth, which is a command line interface for running anEthereum node. It will allow us to interact with Rinkeby which is adifferent testnet. Follow the instructions here . Once we have Mist and geth installed, lets get Rinkeby running. Since Mist doesnt have out of the box support for Rinkeby. We needto connect to it using geth and then tell Mist to use that connection. Lets run in the console the following command: geth --rinkeby --rpc console --rpcapi db,eth,net,web3,personal It starts a new Ethereum node connected to Rinkeby. Lets open Mist and tell it to connect to the running node. Itwill show you an alert saying the connection is insecure, but sincethis is a testnet, we can ignore it. /Applications/Mist.app/Contents/MacOS/Mist --rpc During the first run, it will take some time while the Rinkebyblockchain is downloaded, go for a walk and then come back. After Mist has started, well see an interface similar to the following: We can then create our first account in Rinkeby Continue reading >>

Rinkeby: Ethereum Testnet

Rinkeby: Ethereum Testnet

An archive node synchronizes the blockchain by downloading the full chain from the genesis block to the current head block, executing all the transactions contained within. As the node crunches through the transactions, all past historical state is stored on disk, and can be queried for each and every block. Initial processing required to execute all transactions may require non-negligible time and disk capacity required to store all past state may be non-insignificant. High end machines with SSD storage, modern CPUs and 8GB+ RAM are recommended. To run an archive node, download rinkeby.json and start Geth with: geth --datadir=$HOME/.rinkeby init rinkeby.json geth --networkid=4 --datadir=$HOME/.rinkeby --cache=1024 --syncmode=full --ethstats='yournode:Respect my [emailprotected] ' --bootnodes=enode://a24ac7c5484ef4ed0c5eb2d36620ba4e4aa13b8c84684e1b4aab0cebea2ae45cb [emailprotected] 52.169.42.101:30303 You can download Geth from . A full node synchronizes the blockchain by downloading the full chain from the genesis block to the current head block, but does not execute the transactions. Instead, it downloads all the transactions receipts along with the entire recent state. As the node downloads the recent state directly, historical data can only be queried from that block onward. Initial processing required to synchronize is more bandwidth intensive, but is light on the CPU and has significantly reduced disk requirements. Mid range machines with HDD storage, decent CPUs and 4GB+ RAM should be enough. To run a full node, download rinkeby.json and start Geth with: geth --datadir=$HOME/.rinkeby init rinkeby.json geth --networkid=4 --datadir=$HOME/.rinkeby --cache=512 --ethstats='yournode:Respect my [emailprotected] ' --bootnodes=enode://a24ac7c5484ef4ed0c5eb2d36620ba4e4aa1 Continue reading >>

Myetherwallet.com

Myetherwallet.com

Ledger / TREZOR / Digital Bitbox : Use your hardware wallet . Your device * is * your wallet. MetaMask Connect via your MetaMask Extension . So easy! Keys stay in MetaMask, not on a phishing site! Try it today. Jaxx / imToken Use your Mnemonic Phrase to access your account. Mist / Geth / Parity: Use your Keystore File (UTC / JSON) to access your account. **Do not lose it!** It cannot be recovered if you lose it. **Do not share it!** Your funds will be stolen if you use this file on a malicious/phishing site. **Make a backup!** Secure it like the millions of dollars it may one day be worth. **If you do not reveal your bid, you will not be refunded.** You will unlock your account, enter the Bid Amount, and the Secret Phrase. In the event that two parties bid exactly the same amount, the first bid revealed will win. Once the auction has ended (after 5 days / 120 hours), the winner needs to finalize the auction in order to claim their new name. The winner will be refunded the difference between their bid and the next-highest bid. If you are the only bidder, you will refunded all but 0.01 ETH. The auction for this registrar is a blind auction, and is described in EIP162 . Basically, no one can see *anything* during the auction. Be safe & secure: We highly recommend that you read our guide on How to Prevent Loss & Theft for some recommendations on how to be proactive about your security. Always backup your keys: MyEtherWallet.com & MyEtherWallet CX are not "web wallets". You do not create an account or give us your funds to hold onto. No data leaves your computer / your browser. We make it easy for you to create, save, and access your information and interact with the blockchain. We are not responsible for any loss: Ethereum, MyEtherWallet.com & MyEtherWallet CX, and some of Continue reading >>

Setting Up An Ethereum Node On The Rinkeby Testnet

Setting Up An Ethereum Node On The Rinkeby Testnet

Setting up an Ethereum node on the Rinkeby testnet Warning: this worked for me on macOS as of August 2017. Over time you can expect some/most/all of the information here to have changed. There are several testnets, a number of them old/deprecated. The latest seem to be Kovan and Rinkeby. Kovan seems to work only with Parity while Rinkeby seems to work only with geth. I tried first the experimental light mode but I got errors, so I tried with the full mode. Not a big deal at this moment because the size on disk is below 1GB and it took around one hour to download/build with a 2011 macbook Air. I prefer to make the data directory explicit (where the blockchain files will be stored), so I first create one on a disk of my choice. Also I will work from that directory, so I will assume all commands are entered from it. $ curl -O geth --datadir=. init rinkeby.json $ geth --networkid=4 --datadir=. --ethstats='yournode:Respect my [email protected]' --bootnodes=enode://a24ac7c5484ef4ed0c5eb2d36620ba4e4aa13b8c84684e1b4aab0cebea2ae45cb[email protected]52.169.42.101:30303?discport=30304 --cache=1024 Wait. You will see the INFO message "Block synchronisation started" then many INFO lines starting with "Imported...". Sync is in progress... Note the 1GB cache, you can use less or more depending on your available memory Network id 4 corresponds to the Rinkeby chain While the node is up & running (the above command) you can get info about the blockchain sync progress (among other data) through the JavaScript console. In another terminal window type: You can double check you are seeing the right data progress by looking at the last block at www.rinkeby.io home page. Note that the "NOTE...Importing..." messages include anumberparam Continue reading >>

Hd Wallet - Nethereum

Hd Wallet - Nethereum

Sending Ether using Infura and an HD Wallet Walkthrough on how to instantiate an HD wallet using the mnemonic backup seed words, retrieve the first account private key and finally transfer some Ether using Infura. First of all we need to add a nuget package reference to Nethereum.HdWallet using Nethereum.Web3; using Nethereum.Web3.Accounts; using Nethereum.Util; using Nethereum.Hex.HexConvertors.Extensions; using Nethereum.HdWallet; Retrieve the account using the mnemonic backup seed words Using our backup seed words we will retrieve the Account to be able to sign the transactions. The first step will be to declare our word list: var wordlist = "brass bus same payment express already energy direct type have venture afraid"; Next step is to retrieve the address that we will use to sign the transaction, in this scenario is the first indexed address. Note: Using HD wallets, we can generate and re-generate addresses based on an index number from the same seed. var address = "0xE65B318b9dECf504d1cb6Ea5C367Ca657a070Db1" Now with the backup seed and address we can create the HD wallet and retrive our account. The account contains the private key to sign our transactions. var account = new Wallet(wordlist, null).GetAccount(address); If we want to connect to the Ethereum mainnet (public Ethereum network) we will use the mainnet url , and together with our Account we can create a new instance of Web3. In this scenario we are connecting to the testnet rinkeby. var web3 = new Web3(account, "Ether needs to be converted to Wei before sending it, for this we will use the Conversion Utility. So if we were going to send 1 Ether we will use: Finally we will just set the address that we want to send some Ether, and using the Transaction manager this will be signed with our private key an Continue reading >>

Starting With Ethereum - Deploying And Running A Contract

Starting With Ethereum - Deploying And Running A Contract

Starting with Ethereum - Deploying and running a contract Its definitely time to deploy a contract "for real" and run it. Thanks to the Ethereum wallet, deploying and running a contract is trivial. In the wallet, go to the menu:Contracts tab. Deploying a contract on the blockchain costs ether (and time)! As opposed to traditional deployments on your companys Tomcat or AWS (or whatever), deploying on Ethereum is not free. By deploying a contract, you change the state of the blockchain. So you pay miners to do it for you. And the more you pay, the more incentive you give to potential miners to do it early: its like an auction. Enter your wallet password to validate the deployment. At some point, the contract should have been created. Fill in arguments, and watch as your contract gets executed. Congrats, youve run and deployed your first contract! While the wallet allows to deploy and run code, the developers way is the command-line. Lets see how to reproduce the above steps with it. The first step is to install an Ethereum command-line client . Theres one official such client for Go, C++ and Python. geth is the client for Go, and has no dependencies. Lets install it via Homebrew: brew tap ethereum/ethereumbrew install ethereum Remember that Ethereum is a network made out of nodes. geth is able to run such a node locally. It also has a lot of other capabilities , including mining. To run the node, many parameters are available, such as the network itself, the directory where data is stored, etc. To easily capture them, be sure to have the wallet launched, and run a ps -ef|grep geth. ~/Library/Application Support/Ethereum Wallet/binaries/Geth/unpacked/geth --rinkeby --syncmode fast \ --cache 1024 --ipcpath ~/Library/Ethereum/geth.ipc Yep, thats right. The Ethereum wallet p Continue reading >>

How To Get Ethereum On Rinkeby Test Network Using Macos And Mist Inminutes

How To Get Ethereum On Rinkeby Test Network Using Macos And Mist Inminutes

Co-founder, CTO and Multitasking Ninja at Clouder How to get Ethereum on Rinkeby test network using MacOS and Mist inminutes There is plenty of information from variety of sources how to connect to Rinkeby Ethereum test network and test your smart contracts. Many articles however are outdated in the ever changing blockchain world and are also based on different environment variables such as operating systems etc. which makes it more difficult. I wanted to connect Mist on Rinkeby test network and get test ETH to play with on MacOS. Here are my simple steps, working as of the date of publishing. Download latest Mist from If you had used Mist before, backup your accounts and wallets. On MacOS your accounts are encrypted keystore files at: This will be generated if you just opened Mist regularly after installing and tried connecting to Rinkeby test network. You will also have Chaindata under geth which will be useless and can be deleted after you configure and relaunch Mist to connect to Rinkeby. Disclailmer: This ONLY backs up your Accounts not Wallets. Wallets are held in a different location and i refuse to mention it as i have not tried recovering them myself, to avoid harm to anyone. Do your own research if you need to back up Wallets as well as Accounts. 2. Download latest Geth from and unzip. 2. Download rinkeby.json from and put to the same folder as the unzipped Geth. Files rinkeby.json and geth have to be in the same folder (or of course you can adjust the command in the next step to provide paths if you know what youre doing) 3. Open terminal, CD to to folder above and run: geth --datadir=$HOME/.rinkeby init rinkeby.json 4. In the terminal, CD to the applications folder, where you have Mist installed. Note: not /Users/*user*/Applications but root Applications fo Continue reading >>

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