SIMD-0340
Validate Chained Block ID
Validates the chained block id across a slot's shreds.
Validate Chained Block ID is active on Solana mainnet since epoch 992 — activated ≈ 8 weeks ago.
- mainnet
- active since epoch 992 · ≈ 8 weeks ago
- testnet
- active since epoch 954 · ≈ 2 months ago
- devnet
- active since epoch 1067 · ≈ 2 months ago
Telegram alertsKnow the moment an upgrade is queued — join @xrootdev_updates or message the bot /start for a DM.
How we know
Solana ships protocol changes behind on-chain switches called feature gates. This page reads the switch itself about every minute — once an activation is requested, it completes at the next epoch boundary, which is where the countdown comes from. No announcements, no invented dates.