BLACKCOIN / PROTOCOL V4MIGRATION

MIGRATION READINESS / HEIGHTS ARE AUTHORITATIVE

Migration opens at #6,193,000.

When Migration opens, authenticated v14/v16 funding and spending activate and legacy holders can move value into quantum-protected outputs. It closes at #6,921,999; from #6,922,000 legacy spends are rejected and permanent-burn demurrage begins under the scheduled consensus rules. The observer quorum reports progress against these heights. Activation dates depend on block production.

The quorum-attested lifecycle feed is not available right now. No countdown is being estimated; the height boundaries in the checklist remain authoritative.

Operator checklist during Gold Rush

  1. Back up every wallet now. ML-DSA quantum keys are not derived from the legacy HD seed: a backup must be newer than every quantum address it needs to recover. Back up again after any quantum key creation.
  2. Run a verified published production release. Read the 30.1.5.1 upgrade notes and verify checksums and the signed source commit from the downloads rail before installing.
  3. Verify your node after upgrade. Compare getblockchaininfo, gettxoutsetinfo muhash, and getgoldrushstate across a clean restart; the schema-12 replay_state must report present, marker-valid, and valid-for-tip before staking or mining.
  4. Plan the move before Migration. Quantum address generation and dry-run planning work today; base-chain funding of v14/v16 outputs stays disabled until Migration opens. Do not migrate ordinary value during Gold Rush.
  5. Watch the boundaries here. The countdowns above come from the quorum-attested lifecycle feed; the explorer shows the same schedule against live blocks.

Full procedure: TRANSITION_GUIDE.md ↗ in the signed source tree.