Zano, a privacy-focused Layer 1 blockchain, has taken the drastic step of rolling back an entire month of blockchain history to address a recent massive inflation exploit. An attacker exploited a missing verification step in the gateway address function of Hardfork 6 to forge an enormous amount of tokens—specifically 36.9 million ZANO and 1.8 quadrillion fUSD. Because Zano's privacy technology makes it technically impossible to distinguish between genuine and forged tokens, the team concluded that a hard fork to roll back to block 3,833,000 was the only viable option.

While this measure successfully removed the counterfeit supply, it came at a heavy cost: all legitimate on-chain transactions made by innocent users over the past month have been invalidated. The Zano development team has stated they will use the developer fund, personal assets, and external donations to restore the balances of affected users. However, as trust in the ecosystem has been shaken, the price of ZANO plummeted by 30–40% following the announcement.

This incident, which saw the project abandon 'immutability'—often considered the most fundamental value of a blockchain—in favor of 'practical survival' to avoid ecosystem collapse, raises complex questions for the crypto scene. While some defend it as a necessary decision to prevent total failure, critics argue it exposes a fatal governance weakness in small privacy chains, proving that historical records can be rewritten through consensus at any time. This stands as a prime example of the realistic dilemma faced by small-scale L1 networks trying to maintain system stability. We will need to keep watching to see if they can recover the lost trust.

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