The first Scorex-based testnet, Lagonaki, combines the Permacoin consensus protocol implementation with a simple, Nxt-like payments module. After Lagonaki, the next Scorex-based testnet will be Ergaki, a block chain system that will be used as a public and performant bulletin board for various protocols including voting and auctions. The components of Ergaki are the following:

1. A new Proof-of-Work scheme based on RollerChain. By default, nodes will follow a "rational behavior", and will remove blocks that are not needed for Proof-of-Work mining. Potentially, a scheme like Ghost/Spectre or Bitcoin-NG/ByzCoin will be used to increase the system's troughput.

2. A new transactional module where state will be comprised of boxes. This transactional model will be different from that of Bitcoin, therefore there will be no stack-language scripts.

3. A new fee model by which mandatory fees will not be based on transaction size but on state increment. For example, a transaction that is lowering the state size would have a minimal or no fee at all. In addition, the storage of boxes in a state will incur fees not only based on size, but also based on life timespan also, with a possible exception for a box of some minimal size. So, unlike all other blockchains, it would be not possible to store anything in the Ergaki blockchain forever by paying only once.

4. A new improved difficulty-adjustment algorithm. A white-paper on that is basically ready and will be published before the release of Ergaki.

The IOHK Scorex team will test the Ergaki testnet on some applications by using a large testbed against a private Ethereum network. The goal is outperform the latter by the orders of magnitude.

Ergaki is planned to be released in September, 2016.

A Scorex application is comprised if core, and Scorex itself is the core functions and module interfaces, and modules. The current testnet, Lagonaki, is made of Permacoin consensus protocol implementation and a simplest Nxt-like payments module. Next testnet release will be called Ergaki. It will be truly experimental and innovative blockchain system intended to be a performant public bulletin board for different protocol(voting, auctions etc). What will be inside Ergaki?

1. New Proof-of-Work scheme based on RollerChain. Rational behaviour will be switched on by default, so a node will remove blocks not needed for Proof-of-Work mining. We are also thinking about increasing throughtput with Ghost/Spectre or Bitcoin-NG/ByzCoin scheme.

2. New transactional module. State will be comprised of boxes, transactional model will be different from Bitcoin, so no stack-language scripts.

3. New fees model. Basically, a minimal mandatory fee will be not calculated based on a transaction size, but on state increment. So if a transaction is about state size lowering, it is about minimal or no fee at all. And storing boxes in a state will be charged not for size only, but for life timespan also(with possible exception for a box of some minimal size). So, unlike all other blockchains, it would be not possible to store anything in the Ergaki blockchain forever paying only once.

4. New improved difficulty adjustment algorithm. A paper on that is basically ready and will be published before release.

We will test Ergaki on some applications using large testbed against a private Ethereum network. The goal is outperform the latter by the orders of magnitude.

Planned testnet release time is about September, 2016.