Solana: How to get correct Solana wallet address in Typescript?

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Here is an article on how to get a valid Solana wallet address in TypeScript:

Getting a Valid Solana Wallet Address in TypeScript

In this article, we will explore the steps to get a valid Solana wallet address using TypeScript and the @solana/web3.js library.

Prerequisites

Before proceeding, make sure you have the following installed:

Node.js (version 16 or higher)

The @solana/web3.js package

A Solana CLI installation

Importing Dependencies

To get started, import the required dependencies:


import { Keypair } from `@solana/web3.js;
import * as bip39 frombip39;
import bs58 frombs58;
// Import keypair functions for deriving seeds based on mnemonics
const deriveKey = require('./deriveKey');
const generateSeedFromMnemonic = require('./generateSeedFromMnemonic');
// Import other utility functions as needed



Deriving a wallet address from a mnemonic

To create a wallet address using a mnemonic seed, we will use the deriveKeyfunction. This function takes a mnemonic seed and generates a Keypair instance.


const mnemonic = 'mnemonic_seeds_from_here'; // Replace yourself with your actual mnemonic seed
// Generate a keypair instance from the mnemonic seed
const keypair = deriveKey(mnemonic);

Converting a Keypair to a Solana Wallet Address

A Solana wallet address is represented as a URL-encoded string. We will convert our keypairobject to this format using theurlEncodefunction.


// Convert the Keypair instance to a Solana wallet URL
const walletAddress = keypair.publicKey.url;

Checking for validity

To ensure that the generated address is valid, we can use the isSolanaWalletAddressfunction in the@solana/web3.jslibrary.


// Check if the generated address is a Solana wallet address
const isValid = isSolanaWalletAddress(walletAddress);

Putting it all together
Here is the complete code example:


import { Keypair } from "@solana/web3.js";
import * as bip39 from 'bip39';
import bs58 from "bs58";
// Import keypair functions for deriving mnemonic-based seeds
const deriveKey = require('./deriveKey');
const generateSeedFromMnemonic = require('./generateSeedFromMnemonic');
// Define a function to convert the URL of a Solana wallet address into a keypair instance
function toKeypair(url: string): keypair {
// Convert the URL-encoded string to a keypair instance
return deriveKey(generateSeedFromMnemonic(mnemonic, url));
}
// Define a function to check if a generated address is valid
function isValidWalletAddress(address: string): boolean {
try {
const keypair = toKeypair(address);
// Check if the generated address is a Solana wallet address
return isSolanaWalletAddress(keypair.publicKey.url);
} catch (error) {
// Handle errors or invalid input
console.error(error);
return false;
}
}
// Example usage:
const mnemonic = 'mnemonic_seeds_from_here'; // Replace yourself with your actual mnemonic seed
const walletAddress = toKeypair(mnemonic);
if (isValidWalletAddress(walletAddress.publicKey.url)) {console.log(Valid Solana wallet address: ${walletAddress.publicKey.url}`);
} else {
console.error('Invalid Solana wallet address');
}

This code example demonstrates how to obtain a wallet address from a mnemonic seed, convert the generated Keypair instance to a URL encoded string, and check if it is a valid Solana wallet address.