* add CallContractAtHash to ethclient * add docstring and test * optimize test * ethclient: nits Co-authored-by: Péter Szilágyi <peterke@gmail.com>
* add CallContractAtHash to ethclient * add docstring and test * optimize test * ethclient: nits Co-authored-by: Péter Szilágyi <peterke@gmail.com>