Zano restarts chain at pre-Hard Fork 6 block after Gateway Address exploit
The Zano network was restarted from the block immediately before Hard Fork 6, discarding roughly a month of chain history after an exploit tied to Gateway Addresses.
Zano has rolled its blockchain back by about a month, restarting the network at the block height that came immediately before Hard Fork 6 — the upgrade that introduced Gateway Addresses. The rollback follows an exploit involving that feature.
What the rollback means
Restarting from a point before Hard Fork 6 removes all blocks produced since that upgrade went live, meaning activity recorded on the discarded chain is no longer part of the network's accepted history. Such reversions are uncommon and require node operators, miners and validators to converge on a single chain.
Key details
- The chain was restarted at the block directly preceding Hard Fork 6
- Hard Fork 6 was the upgrade that brought Gateway Addresses to Zano
- The reversion follows an exploit connected to Gateway Addresses
- Roughly one month of blocks is affected
Rollbacks of this scale can create complications for exchanges, wallets and payment services that processed transactions during the discarded period, since those transfers are not reflected on the restored chain. It is not yet clear from the available information how the project intends to handle balances or activity from the rolled-back window.