Electron Gumroad License

This library allows you to verify and store a user's license for your Electron app with Gumroad's API.

A valid license is automatically stored in a local file that's encrypted with a key unique to the user's computer. While this doesn't prevent cracking a license, it makes it more difficult to copy a license file to another computer.

Getting Started

To use this library, create a new licenseManager with the ID of your Gumroad product. You can then use it to check the current license, validate a new one, and more:

import { createLicenseManager } from "electron-gumroad-license";

const licenseManager = createLicenseManager("product-id");

// Verify a license key and store it if it's valid
await licenseManager.addLicense("license-key");

// Check whether a local license exists and if it's valid
await licenseManager.checkCurrentLicense();

Options

In addition to the product ID, you can pass an option object to the licenseManager. The following values can be set:

const options = {
  /** Specifies how many times a single license code can be activated. Default: unlimited. */
  maxUses: number;
  /** Specifies how many days a license stays valid without being validated. Default: unlimited. */
  maxDaysBetweenChecks: number;
  /** Overrides Gumroad's default API endpoint for verifying licenses. */
  gumroadApiUrl: string;
  /** Disables encrypting the license key with a unique machine id. */
  disableEncryption: boolean;
}

Contributing

This package is still in its early stages. Please feel free to contribute by opening issues and submitting PRs if you feel that something could be done better.