The developers of the cross-chain protocol Synapse Bridge have prevented a hacker from withdrawing about $8 million from the Avalanche Neutral Dollar (nUSD) metapool. The incident, which the team shared in a Discord chat, took place on November 7.
Synapse is a cross-chain bridge for moving tokens between multiple Layer 1 and Layer 2 protocols using AMM.
According to the project’s developers, the attacker tried to exploit a vulnerability using a bridge to transfer assets from Polygon (MATIC) to Avalanche (AVAX). The team was able to identify a bug in the AMM Saddle metapool contracts. The team added:
“The validators agreed to go offline to put the network on hold.”
The transaction for about $8 million was rejected. Funds will be returned to affected liquidity providers following the completion of a full audit.
The developers of the DeFi platform bZx have earlier admitted the loss of funds as a result of the hack. The preliminary damage was estimated at $55 million.
In the third quarter of 2021, hackers stole cryptocurrencies worth more than $1.1 billion. The Ethereum ecosystem was the most affected, as during the analyzed period, it lost more than $800 million as a result of 20 attacks.