# Elemental Battles

### Try out LiquidApps’s take on Elemental Battles:

<http://elemental.liquidapps.io/> | [code](https://github.com/liquidapps-io/zeus-sdk/tree/master/boxes/groups/sample/cardgame)

The game incorporates:

* vRAM - light-weight caching solution for EOSIO based RAM
* LiquidAccounts - EOSIO accounts that live in vRAM instead of RAM
* LiquidDNS - DNS service on the blockchain | [contract table](https://kylin.bloks.io/account/dnsregistry1?loadContract=true\&tab=Tables\&table=dnsentry\&account=dnsregistry1\&scope=cardgame1112\&limit=100)
* Frontend stored on IPFS
* user data is stored in the vRAM `dapp::multi_index` table (vRAM) | [code](https://github.com/liquidapps-io/zeus-sdk/blob/master/boxes/groups/sample/cardgame/contracts/eos/cardgame/cardgame.hpp#L94)
* keys stored in `dapp::multi_index` table | [code](https://github.com/liquidapps-io/zeus-sdk/blob/master/boxes/groups/sample/cardgame/contracts/eos/cardgame/cardgame.hpp#L94)
* keys created using the account name and password as seed phrases | [code](https://github.com/liquidapps-io/zeus-sdk/blob/master/boxes/groups/sample/cardgame/frontends/main/src/components/Login/Login.jsx#L35)
* eosjs-ecc’s `seedPrivate` method is used to create the keypair | [code](https://github.com/EOSIO/eosjs-ecc#seedprivate)
* logic to create LiquidAccount transactions | [code](https://github.com/liquidapps-io/zeus-sdk/blob/master/boxes/groups/sample/cardgame/frontends/main/src/services/ApiService.js#L12)

To launch locally:

```
mkdir cardgame; cd cardgame
zeus box create
zeus unbox cardgame
zeus migrate
zeus run frontend main
```