mintme-sdk/lib/utils/wallet.js

A simple and powerful SDK for creating and managing tokens on the Solana blockchain. MintMe SDK simplifies the process of minting SPL tokens with metadata, managing token authorities, and interacting with the Solana token ecosystem.

/**
 * Wallet management utilities
 */

const fs = require("fs");
const path = require("path");
const solanaWeb3 = require("@solana/web3.js");

/**
 * Verifies if the wallet file exists
 * @param {string} walletPath - Path to the wallet file
 * @returns {boolean} - true if the file exists, false otherwise
 */
function verifyWalletFile(walletPath) {
  if (!fs) {
    console.warn(
      "The verifyWalletFile function is only available in Node.js environments"
    );
    return false;
  }

  try {
    const resolvedPath = path ? path.resolve(walletPath) : walletPath;
    return fs.existsSync(resolvedPath);
  } catch (error) {
    console.error("Error verifying wallet file:", error);
    return false;
  }
}

/**
 * Loads a wallet from a file
 * @param {string} walletPath - Path to the wallet file
 * @returns {solanaWeb3.Keypair|null} - Loaded Keypair or null if there's an error
 */
function loadWalletFromFile(walletPath) {
  if (!fs) {
    console.warn(
      "The loadWalletFromFile function is only available in Node.js environments"
    );
    return null;
  }

  try {
    const resolvedPath = path ? path.resolve(walletPath) : walletPath;
    if (!fs.existsSync(resolvedPath)) {
      console.error(`Error: Wallet file not found at ${resolvedPath}`);
      return null;
    }

    const walletData = JSON.parse(fs.readFileSync(resolvedPath, "utf-8"));
    return solanaWeb3.Keypair.fromSecretKey(Buffer.from(walletData));
  } catch (error) {
    console.error("Error loading wallet from file:", error);
    return null;
  }
}

module.exports = {
  verifyWalletFile,
  loadWalletFromFile,
};