VR Park ICO

Technologies used

1. Ethereum blockchain as a base of infrastructure
2. solc 0.5.0
3. Truffle 5.0.1 for testing
4. OpenZeppelin v2.1.1 contracts as a base of source code

Project summary

The project consists of ERC20 app token, crowdsale step smart contract and oracle.

contracts/VrParkToken.sol contans VR token smart contract. VR is a capped mintable token.

contracts/VrParkIcoStep.sol is a ICO step smart contract. It has the following features:

• Any investor wishing to pay more than thresholdForWhitelist must be in a whitelist
• ETHVR rate is defined as ETHUSD / USDVR
• ETHUSD is taken from oracle

contracts/ExchangeInteractor.sol retrieves the quotes from given exchange. It uses oraclize API widely.

How to use

In order to use an instance of VrParkIcoStep, the following steps have to be taken:

1. Create a VrParkToken instance.
2. Create an ExchangeInteractor instance.
3. Create a VrParkIcoStep instance using previously created token and oracle instances as corresponding parameters.
4. Add address of VrParkIcoStep instance as a minter using token's addMinter function.