Solidity Blogpost #1: Config Contract, snippet 4

creditDesk.sol

import "./GoldfinchConfig.sol";
import "./ICreditLineFactory.sol";

contract CreditDesk {
  GoldfinchConfig public config;

  function createCreditLine(CreditLineParams params) public {
    require(validParams(params), "invalid params!");
    uint256 maxCreditLineAmount = config.numbers(0);
    require(params.amount <= maxCreditLineAmount, "Amount is above maximum");
    
    address clFactoryAddress = config.addresses(0);
    ICreditLineFactory(clFactoryAddress).createCreditLine(params);
  }

  modifier onlyOwner() {
    address protocolOwner = config.addresses(1);
    require(msg.sender == protocolOwner, "Must be owner!");
    _;
  }
}