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

How ​​to Get a Proper 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)

• Package @solana/web3.js

• A Solana CLI installation

Importing Dependencies

To get started, import the required dependencies:

import { Keypair } from '@solana/web3.js';
import * as bip39 from 'bip39';
import bs58 from 'bs58';
// Import keypair functions for mnemonic-based seed derivation
const deriveKey = require('./deriveKey');
const generateSeedFromMnemonic = require('./generateSeedFromMnemonic');
// Import other utility functions as needed

Getting a wallet address from a mnemonic

To create a wallet address using a mnemonic seed, we’ll use the deriveKey function. This function takes a mnemonic seed and generates a keypair instance.

const mnemonic = 'your_mnemonic_seed_here'; // Replace with your current 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 keypair object to this format using the urlEncode function.

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

Checking validity

To ensure that the generated address is valid, we can use the isSolanaWalletAddress function from the @solana/web3.js library.

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

Putting it all together

Here is the full code example:

import { Keypair } from '@solana/web3.js';
import * as bip39 from 'bip39';
import bs58 from 'bs58';
// Import keypair functions for mnemonic-based seed derivation
const deriveKey = require('./deriveKey');
const generateSeedFromMnemonic = require('./generateSeedFromMnemonic');
// Define a function to convert a Solana wallet URL to 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
returns isSolanaWalletAddress(keypair.publickey.url);
} catch ( error ) {
// Handle errors or invalid input
console. error(error);
returns false;
}
}
// Example usage:
const mnemonic = 'your_mnemonic_seed_here'; // Replace with your current 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 derive 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.

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