Plugin / Cairn

Braydon Fuller



Sell fine art online. Cairn is built to be fast and secure to display artwork full screen and across a wide range of display sizes.

Cairn is fast because template rendering is handled on the client side. Cairn replaces the theme and permalink features of WordPress by hooking into the rewrite rules with url rules defined in static/urls.json. Templates are written using EJS Templating and are rendered on the client side. There is a jQuery plugin written that uses the same rules to speed up user interactions, and with enough data able to render URLS without a request to the remote server.

Cairn is secure because personally identifiable information is stored in the database encrypted with a GPG public key, and private keys stored optimistically offline. This information should be submitted over an TLS connection (HTTPS), and is compulsory when using this plugin. Additionally security features include payments being able to be handled using cryptocurrency Bitcoin, and thus no potentially personally identifiable information is nessasary to be shared with a third party and can be directly peer-to-peer.


  • Accept bitcoin and credit card payments
  • Personal privacy and security
  • Dynamic prices and currency preference
  • Designed for mobile
  • URL navigation is client side and lightweight


  • A computer running GNU/Linux, Apache, MySQL to do development and testing.
  • The use of GPG and have a public/private for email
  • Expert knowledge of JavaScript, jQuery and AJAX
  • General knowledge of EJS JavaScript templating
  • Experience with the Electrum Bitcoin Wallet and general concepts of peer-to-peer payments.
  • Understand priciples of asymetric cryptography and public/private keys
  • Intermediate knowledge of PHP
  • USPS Web Tools API account for shipping calculations
  • A Stripe account to process credit cards
  • General knowledge of RSS/Atom feeds
  • Apache .htaccess and general priciples of rewriting URLs
  • Experience with configuring cron schedules
  • Knowledge of PHP APC for caching is a plus


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Details Information



First Released

02 Jan, 2014

Total Downloads


Wordpress Version

3.8 or higher

Tested up to:


Require PHP Version:




This plugin has been closed.


The plugin hasn't been transalated in any language other than English.


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