agent/somcsrv/client.go
func (c *Client) Endpoint(channelKey data.Base64String) (data.Base64String, error) {
	return c.requestWithPayload("api_endpoint", string(channelKey))
}
func (c *Client) Endpoint(channelKey data.Base64String) (data.Base64String, error) {
	return c.requestWithPayload("api_endpoint", string(channelKey))
}
// Endpoint gets endpoint message through tor net.