OpenZeppelin - how to check the owner's address of an Ownable token

Question

Please excuse this basic question, as I am quite new to this. I created a sample token using OpenZeppelin framework. The token class inherits MintableToken which in turn inherits Ownable. This class has a variable:

address public owner;

which is by default set to msg.sender, but how do i check the address of this owner using web3js/truffle. I've tried this:

coinInstance = testCoin.at("address")
coinInstance.owner

but i only get the following

{ [Function]
  call: [Function],
  sendTransaction: [Function],
  request: [Function: bound ],
  estimateGas: [Function] }

Answer 1

I had the same problem, but figured it out! Since owner is a public address, Solidity automatically creates a getter function, which you have to call like so:

coinInstance = testCoin.at("address")
coinInstance.owner()

That will return a Promise that should resolve to the owner address.