def deploy_rpc_test_contract(deploy_client, name):
    contract_path, contracts = get_test_contract(f"{name}.sol")
    contract_proxy, _ = deploy_client.deploy_solidity_contract(
        name, contracts, libraries=dict(), constructor_parameters=None, contract_path=contract_path
    )

    return contract_proxy
def voltage(title, pos, voltage, ax=0):
    """plot voltage vs. position"""
    if ax == 0:
        ax = plt.gca()
    ax.set_title('{} / V'.format(title))
    ax.grid(True)
    ax.plot(pos, voltage)