Module gateway 

Discord Gateway WebSocket client.

Protocol flow: connect → HELLO → IDENTIFY (or RESUME) → READY → event loop.

On disconnect:

• If we have a stored session_id + last_seq, attempt RESUME using the resume_gateway_url from the prior READY payload.
• On INVALID_SESSION(resumable=false) or RECONNECT, drop session and re-IDENTIFY.

Heartbeat:

• HELLO provides heartbeat_interval in milliseconds.
• We send HEARTBEAT every interval, tracking ACK. If the prior heartbeat was not ACK’d, the connection is a zombie — close and reconnect.

Structs

Session 🔒

Constants

GATEWAY_URL 🔒

MAX_RECONNECT_DELAY_SECS 🔒

RECONNECT_DELAY_SECS 🔒

Functions

handle_dispatch 🔒

run_gateway_loop

run_session 🔒

Run a single Gateway session. Returns: Ok(Some(session)) — clean disconnect, can attempt RESUME Ok(None) — clean disconnect, session is invalid (re-IDENTIFY) Err(e) — unexpected error, will re-IDENTIFY after backoff

unix_secs 🔒