Ethereum Membership Tokens

This repository showcases some simple, example contracts:

1. owned.sol: A simple base contract that defines what it means for a contract to have an owner.
2. ExpiringMembership.sol: A contract which coordinates and keeps a register of memberships. Memberships will expire after a certain amount of time. Memberships can be added (or revoked) by so-called registrars which can be people in the real-world or even other smart contracts such as the EthApplicationRegistrar mentioned below.
3. EthApplicationRegistrar.sol: Allows Ethereum accounts to enroll to the ExpiringMembership contract by making a payment in Ether. This contract defines a renewal period: the amount of time before membership expiry that membership can be renewed.

These contracts are meant to serve as a a simple example of Ethereum smart contracts. More work must be done on them before they can be considered ready for the real world. Use at your own risk!