def deploy_service_registry_and_set_urls(
    private_keys, web3, contract_manager, service_registry_address
) -> Tuple[ServiceRegistry, List[str]]:
    urls = ["http://foo", "http://boo", "http://coo"]
    c1_client = JSONRPCClient(web3, private_keys[0])
    c1_service_proxy = ServiceRegistry(
        jsonrpc_client=c1_client,
        service_registry_address=service_registry_address,
        contract_manager=contract_manager,
    )
    c2_client = JSONRPCClient(web3, private_keys[1])
    c2_service_proxy = ServiceRegistry(
        jsonrpc_client=c2_client,
        service_registry_address=service_registry_address,
        contract_manager=contract_manager,
    )
    c3_client = JSONRPCClient(web3, private_keys[2])
    c3_service_proxy = ServiceRegistry(
        jsonrpc_client=c3_client,
        service_registry_address=service_registry_address,
        contract_manager=contract_manager,
    )

    # Test that getting a random service for an empty registry returns None
    pfs_address = get_random_service(c1_service_proxy, "latest")
    assert pfs_address is None

    # Test that setting the urls works
    c1_service_proxy.set_url(urls[0])
    c2_service_proxy.set_url(urls[1])
    c3_service_proxy.set_url(urls[2])

    return c1_service_proxy, urls
def on_backend_state_changed(self, sender, backend_id):
        """
        Signal callback executed when a backend is enabled/disabled.

        @param sender: not used, only here to let this function be used as a
                       callback
        @param backend_id: the id of the backend to add
        """
        if backend_id in self.backendid_to_iter:
            b_iter = self.backendid_to_iter[backend_id]
            b_path = self.liststore.get_path(b_iter)
            backend = self.req.get_backend(backend_id)
            backend_name = backend.get_human_name()
            if backend.is_enabled():
                text = backend_name
            else:
                # FIXME This snippet is on more than 2 places!!!
                # FIXME create a function which takes a widget and
                # flag and returns color as #RRGGBB
                style_context = self.get_style_context()
                color = style_context.get_color(Gtk.StateFlags.INSENSITIVE)
                color = rgba_to_hex(color)
                text = f"<span color='{color}'>{backend_name}</span>"
            self.liststore[b_path][self.COLUMN_TEXT] = text

            # Also refresh the tags
            new_tags = self._get_markup_for_tags(backend.get_attached_tags())
            self.liststore[b_path][self.COLUMN_TAGS] = new_tags