Solana: How to get the proper solana wallet address in typescript?

Here is an article on getting 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 later)

• Package @solana/web3.js

• Solana CLI installation

Importing dependencies

Start by importing the required dependencies:

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

Deriving a wallet address from a note

To generate a wallet address using a mnemonic seed, we use the deriveKey function. This function takes a mnemonic seed and creates an instance of a key pair.

const mnemonic = 'my_mnemonic_seed_here'; // Replace with your actual mnemonic seed
// Create a key pair instance from the mnemonic seed
const mnemonic = deriveKey(mnemonic);

Converting a key pair to a Solana wallet address

The Solana wallet address is presented as a URL-encoded string. We convert our “keypair” object to this format using the “urlEncode” function.

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

Validity check

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

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

Put 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 key pair functions for mnemonic-based seed derivation
const deriveKey = require('./deriveKey');
const generateSeedFromMnemonic = require('./generateSeedFromMnemonic');
// Define a function that converts a Solana wallet URL address into a key pair instance
function toKeypair(url: string): Keypair {
// Convert a URL-encoded string into a key pair instance
return deriveKey(generateSeedFromMnemonic(mnemonic, url));
}
// Define a function that checks if the generated address is valid
function isValidWalletAddress(address: string): boolean {
try {
const keypair = keypair(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;
}
}
// Usage example:
const mnemonic = 'my_memory_seed_here'; // Replace with your actual memory seed
const walletaddress = keypair(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 shows 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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