pub trait VkAuth {
fn create_viewing_key<S: Storage, A: Api, Q: Querier>(
&self,
entropy: String,
_padding: Option<String>,
deps: &mut Extern<S, A, Q>,
env: Env
) -> StdResult<HandleResponse> { ... }
fn set_viewing_key<S: Storage, A: Api, Q: Querier>(
&self,
key: String,
_padding: Option<String>,
deps: &mut Extern<S, A, Q>,
env: Env
) -> StdResult<HandleResponse> { ... }
}