slot-radar

A live terminal view of Solana's slot clock, built on the OrbitFlare Go SDK.

It subscribes to Jetstream v2's slot lifecycle stream and joins it with the RPC leader schedule to show the current slot and leader, the measured slot time, who leads next, and every skipped slot as it happens.

Check out the article to understand more.

slot radar · epoch 1011

  slot 436945880 · leader Fd7b…69Nk
  measured slot time: 443ms avg over last 30

  next up:
    slot 436945884  Awes…vpLM  (in 4 slots, ~1.6s)
    slot 436945888  GYx8…3YGQ  (in 8 slots, ~3.2s)
    slot 436945892  EdFU…sk6w  (in 12 slots, ~4.8s)
    slot 436945896  5pPR…HzSm  (in 16 slots, ~6.4s)

  last 60 slots: ✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✓✗✗✗✗✓✓✓✓✓✓✓●
  skipped this session: 4  (latest: 436945871)

Run

ORBITFLARE_LICENSE_KEY=ORBIT-... go run .

Environment

Variable	Default
ORBITFLARE_LICENSE_KEY	(required for the OrbitFlare RPC endpoint)
ORBITFLARE_RPC_URL	http://ams.rpc.orbitflare.com
ORBITFLARE_JETSTREAM_URL	http://ams.jetstream.orbitflare.com

Requires Go 1.25 or later.