Cómo desplegar nuestro contrato en Ropsten

Having your smart contract finished, now it's time to make a deployment on a test network.

Ethereum test networks

The Ethereum ecosystem offers several test networks that you can use to make contract deployments and test their functionality.

The most important Ethereum test networks are:

• Ropsten (deprecated)
• Rinkeby (deprecated)
• Goerli
• Sepolia

Deprecation of test networks.
For the purposes of this exercise the Ropsten network was used, but note that this network is already deprecated, as is the Rinkeby network. It is advisable to use the Goerli network, following exactly the same steps as you will see in this guide.

Your first wallet

Don't have a wallet? You will need one, but don't worry, it's super easy to install and set up a wallet.

Wallets will allow you to sign transactions you make in any smart contract. They are indispensable to be able to deploy a contract first on a test network and interact with it later.

For this purpose, we will use the pioneer in the Blockchain world and most popular wallet called Metamask.

Step 1: Installing Metamask

Start by installing the Metamask extension on your corresponding Google Chrome or Mozilla Firefox browser. You can also find the app for Android or IOS.

Step 2: Account creation

Once the app is installed, follow the steps to create an account. The most important thing to keep in mind is the following:

You will need to create a password to access it. This password is unique per device, which means that in another browser or in the mobile app, you will not necessarily be able to access your account with the same password.

The passwords on each device serve as security and quick access to your wallet. The real password is the one that will be given to you later, your "seed key" or recovery phrase. It is a set of 12 to 24 random words that together will form the private key that you should not give to anyone. If you do, you may lose your cryptoassets.

You will have to meticulously save your words and confirm it to access your wallet. The order of the words is also very important, so be sure to record each one well.

Once you have successfully confirmed your recovery phrase, you will have access to your wallet and will be able to interact with a smart contract.

Ether Faucets

Proof networks use fictitious and worthless ETH and you can get it through a faucet.

Faucets are applications that deliver proof tokens into your wallet that you can later use to pay transaction fees on your contract and interact with it.

:::(Info) (How Faucets work)
Depending on how the Faucet works, entering your wallet address is enough to receive tokens once a day. Other Faucets are more limited to avoid spam and request contact by Twitter or Facebook to validate the addresses.
:::

Step 1: Locating a suitable faucet.

To receive trial ETH, you must find a faucet that connects to the Ethereum network you want to use. You will be able to find many faucet for each of the networks, you just need to ask Google:

• Ropsten faucet
• Rinkeby faucet
• Goerli faucet

Step 2: Request for trial ETH

Copy the address of your wallet to request ETH, you can find it by clicking on the top of the Metamask interface.

Use the address in the faucet you have chosen to use and in a few minutes the ETH should arrive in your account.

Deployment of the contract

The time has come. After choosing the test network, creating a wallet and requested dummy ETH, Remix will help us deploy the contract in Ropsten.

For this, you must first change the network in your Metamask very easily from your wallet:

Already in Remix, before deploying your contract you must select in ENVIRONMENT: "Injected Provider - Metamask".

This will allow you to click on the Deploy button and Metamask will ask you to confirm the transaction.

You will be able to observe in the Remix console the activity and deployment of your contract. Also pay attention to the transaction, as you have had to pay a commission for the deployment of a contract.

Congratulations! This may have been your first smart contract deployment.

Conclusion

There are many ways to deploy smart contracts. Remix has its own, but you will also find others working with development environments like Truffle or Hardhat.

The important thing here is to take your first steps and understand how professional software development works and the whole lifecycle of a smart contract.

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Contribution created by: Kevin Fiorentino (Platzi Contributor).