ShortNameController

gistfile1.txt

pragma solidity ^0.5.0;

import "openzeppelin-solidity/contracts/ownership/Ownable.sol";

class ShortNameController is Ownable {

    BaseRegistrar base;
    ProxyRegistry proxyRegistry;
    address whitelistedCaller;
    
    constructor(BaseRegistrar _base, ProxyRegistry _proxyRegistry, uint _registrationDuration, address _whitelistedCaller) public {
        proxyRegistry = _proxyRegistry;
        base = _base;
        registrationDuration = _registrationDuration;
        whitelistedCaller = _whitelistedCaller;
    }
    
    function available(string memory name) public view returns(bool) {
        bytes32 label = keccak256(bytes(name));
        return valid(name) && base.available(uint256(label));
    }

    function register(string name, address owner) external {
        // Check that register is being called owner of the controller, or the owner's Wyvern proxy.
        require(address(proxyRegistry.proxies(whitelistedCaller)) == msg.sender || whitelistedCaller == msg.sender);
    
        // Check that the name is 3 - 6 characters.
        uint len = name.strlen();
        require(len >= 3 && len <= 6);
    
        // Check that the name is available.
        require(available(name));

        // Register the name for the configured duration (presumably one year).
        base.register(uint256(label), owner, _registrationDuration);
    }
 }