Function dynamic_http_post_status 

fn dynamic_http_post_status(
    url: &str,
    content_type: &str,
    payload_body: &str,
    extra_headers: &[(&str, String)],
    timeout_seconds: u64,
    max_response_bytes: usize,
    allow_plaintext_local: bool,
) -> Option<u16>

Sends one bounded, policy-validated webhook POST.