[{"constant":true,"inputs":[{"name":"addr","type":"address"}],"name":"ethBalanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"data","type":"bytes"}],"name":"aggregate","outputs":[{"name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"}]