{
  "getBalance":  {
      "constant": true,
      "inputs": [
        {
          "name": "principalToken",
          "type": "address"
        }
      ],
      "name": "getBalance",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    }
}
