Zano's emergency rollback, released September 27, removed roughly one month of previously confirmed transactions from the recovered chain. The network restarted from block 3,833,000, dated August 26 at 15:50 UTC, with all subsequent transactions absent from the recovered chain.
The core team attributed the rollback to a Gateway Address vulnerability that allowed unauthorized ZANO and Freedom Dollar (fUSD) to enter circulation. The team reported no compromise of wallet spend keys or ordinary transaction privacy, though a full post-mortem remains pending.
Zano's team said it will draw on the blockchain network's developer fund, team members' personal funds, and committed contributors to finance recovery for affected users. However, no funding amount, eligibility criteria, payment amounts, or timetable for claims have been published.
The team stated that the network is stable and ZANO supply and emission will remain unchanged. The named funding sources represent a plan rather than a published guarantee that all losses will be covered.
What Affected Users Should Do
Zano advised affected users to take no claims action yet, as the team will publish instructions after working with partners and counterparties. Users are encouraged to save transaction IDs, trade records, and exchange records, and to open a support ticket to put their case on record, though no claims can be preapproved before rules are published.
The core team instructed users to update their wallets and check a payment's final status on the recovered chain before resending it. Each exchange, wallet provider, and payment service must make its own update and announce when ready.
The team noted that the rollback cannot undo payments already settled in USDT, DAI, or other assets on separate networks. This distinction is significant for transactions involving a Zano payment on one side and an external payment on the other.
Zano has promised further updates on wallet and service adoption, along with a post-mortem analysis of the Gateway Address flaw.
