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3.4.1 Get an Ethereum Wallet To perform operations in Ethereum you need a wallet. A wallet is an application that allows you to interact with the rest of the network. Wallets store the private-keys for your Ethereum addresses. For simplicity we will be using Metamask8. Metamask is a browser-based wallet that runs locally as a Chrome extension. Keys are stored locally and transactions are signed with them. These are then sent to the rest of the network through a Metamask operated public node. 3.4.1.1 1. Get Metamask Go to the Chrome Webstore9 and install Metamask. 3.4.1.2 2. Create a New Account Click on the Metamask icon on the top right corner of your Chrome windows and follow the wizard to create an account. Make sure it is created in the Rinkeby testnet. To check this, after creating the account, click on the icon next to the Metamask fox, on the top left corner of the Metamask window. If you are using another network, just switch to Rinkeby and then follow the wizard again. Watch video: “Creating a Rinkeby Account using Metamask”10 3.4.1.3 3. Get Some Ether To register you will need a minimum amount of Ether. Fortunately, this is easy to get in the testnet (in the mainnet you must either buy it or be lucky enough to be able to mine it). For the testnet it is possible to use “faucets”. Faucets are places to get free Ether. The most popular Rinkeby faucet11 requires users to create a GitHub gist12. This is a simple way to limit misuse of the faucet. Creating gists is easy, you only require a GitHub account. Create a public GitHub gist and paste your Metamask Rinkeby address in it. Then go back to the faucet and place the link to the gist in the required field, then click on “Give Me Ether” (the faucet is located in the crypto faucet section on the left bar). After a bit, you should see your newly acquired Ether in Metamask. To get your Rinkeby Ethereum address, go to Metamask and then click on the “copy” icon next to your account name. This will be your primary Ethereum address. In an actual production system, this would be the address of an account with lots of Ether in it. One that you would not want to expose every time you want to log in to some third party site using your Ethereum address. Watch video: “Using a Rinkeby Faucet to Obtain Ether”13 8 https://metamask.io/ 9 https://chrome.google.com/webstore/detail/metamask/nkbihfbeogaeaoehlefnkodbefgpgknn 10 https://cdn.auth0.com/blog/ethereum3/Metamask- Account- Rinkeby.mp4 11 https://www.rinkeby.io/ 12 https://gist.github.com/ 13 https://cdn.auth0.com/blog/ethereum3/Metamask- Faucet- Rinkeby.mp4 61PDF Image | Intro to Ethereum and Smart Contracts
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