ShenzhenKitties.sol

pragma solidity ^0.4.19;
pragma experimental ABIEncoderV2;

contract ShenzhenKitties {
  event Registered(string name, address owner);
  event Transferred(string name, address from, address to);

  mapping (bytes32 => address) kitties;
  string[] public kittieNames;
  
  function ShenzhenKitties() public {
      registerInternal("test", 0x1234);
  }

  function registerInternal(string name, address owner) internal {
    bytes32 key = keccak256(name);
    require(kitties[key] == 0);
    kitties[key] = owner;
    kittieNames.push(name);
    Registered(name, owner);
  }
  
  function registerKittie(string name) external {
    registerInternal(name, msg.sender);
  }

  function transferKittie(address to, string name) external {
    bytes32 key = keccak256(name);
    require(msg.sender == kitties[key]);
    kitties[key] = to;
    Transferred(name, msg.sender, to);
  }
  
  function kittieOwner(string name) external view returns (address) {
    bytes32 key = keccak256(name);
    return kitties[key];
  }
  
  function getKittieNames() external view returns (string[]) {
      return kittieNames;
  }
}