Zano rolls blockchain back a month after Gateway Address exploit

What happened

The Zano blockchain has been restarted at the block height that came immediately before Hard Fork 6, which introduced Gateway Addresses. The Zano blockchain has been restarted at block 3,833,000, immediately before Hard Fork 6, which introduced the affected feature.

The recovery requires participating nodes, miners, stakers, exchanges and other services to adopt the update, the team said Sunday. Exchanges and other services had to scan the blockchain to identify incoming payments, track those outputs and select which ones to spend when processing withdrawals.

It also cannot reverse payments already settled on other blockchains. “Doing nothing meant unauthorized ZANO and fUSD in circulation without limit, diluting every holder and breaking the most basic promise a currency makes: a fixed supply,” said Zano’s head of marketing and growth Quinten van Welzen.

Before Gateway Addresses, Zano’s ordinary wallets tracked funds as separate transaction outputs (UTXOs), rather than a single account balance. Its standard private transactions conceal senders, receivers, transferred amounts and asset types.

Key facts

• The recovery — requires: participating nodes, miners, stakers, exchanges and other services to adopt the update, the team said Sunday