How to Build a Wallet Generator for Solana in React
December 27, 2021
Introduction
In this practical guide you will build a basic Wallet application with React and Web3 that will interact with Solana Network.
This application will do the following operations:
Connect to the Network
You will use Connection to create a connection with Solana Network. There are three options: mainnet-beta, testnet and devnet.
In this example we will use devnet because it is the one that acts like a playground for anyone who wants to start to build with Solana and tokens aren't real.
Generate an Account
In order to interact with Solana Network you will need to create a Keypair that will contain a Public Key and a Secret Key. Public Key will be your address for anyone that want to send you tokens and Secret Key will be used to sign transactions.
Get the balance of the generated Account
You can check at anytime the balance of an account if you know its public key.
Request an Airdrop
Solana devnet allows us to ask for free tokens to be able to do tests while we are building our applications.
These tokens aren't real and you will see them only while you are connected to devnet.
Prerequisites:
In order to follow this guide you will need the following:
import {
Connection,
clusterApiUrl,
...
} from "@solana/web3.js";
import {
Connection,
clusterApiUrl,
...
} from "@solana/web3.js";
import {
Connection,
clusterApiUrl,
...
} from "@solana/web3.js";
Connection accepts an endpoint parameter with the url of the fullnode.
In our example we will use devnet that as we mentioned before it is the one intended to act like a playground for anyone who wants to start building in Solana Network and where tokens are not real.
Functions are already defined so the only you will need to do is to implement them.
So, look for createConnection function in your code and modify it to look like this:
Line 2: Defines a connection variable with the result of calling createConnection function.
Line 4: Defines a lamports variable with the result of calling the getBalance function of the connection that we defined before.
Line 8: Instead of return the value in lamports (1000000000) we divide it by the amount of lamports in a SOL to return a more friendly value: 1 SOL.
A lamport is the minimal unit in Solana Network: 1 SOL = 1 billion lamports.
Request Airdrop
As we said before, in devnet tokens are not real. Solana Network let us to request some tokens to be able to do tests while we are building our applications.
Solana Web3 requestAirdrop function accepts two parameters:
to: PublicKey of the account
lamports: number of lamports
For that, we will need to implement the empty requestAirdrop function in our code like this:
Line 3: Defines a connection variable with the result of calling createConnection function.
Line 5-8: Defines an airdropSignature variable with the result of calling requestAirdrop function of the connection that we defined before.
Line 10: Defines a signature variable with the result of calling confirmTransaction function.
Line 12: Defines a newBalance variable with the result of calling our getBalance function.
Line 14: Set state variable to update balance key with newBalance.
Line 15: After update balance we set button to initial state.
Conclusion
Congratulations on making it to the end! You've taken your first steps to build a basic Wallet Application that interacts with Solana Network. You learned how to connect to the network, generate random accounts and request airdrops. Also, you learned how to put everything together working with React.
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