THORChain node operators halted swaps on Saturday across ten networks, including Bitcoin, Ethereum, Solana and Tron, after a one-block reorganisation on Ethereum exposed a refund bug, Cointelegraph reports. A 10 ETH deposit that had already been credited disappeared from the chain, the protocol refunded money it never received and paid out an extra 10 ETH. The project team warned that, now the bug is public, every reorg could become an exploit opportunity. According to Chainalysis, the pause also delayed the laundering of funds stolen from Binance.

What it means: The incident exposes a weakness shared by all bridges and cross-chain swap protocols: they must decide when a transaction on another chain counts as final. Credit too quickly and a reorganisation can erase the deposit after they have paid out. Wait too long and the user experience suffers. THORChain is also at the centre of the debate over whether neutral, permissionless infrastructure should block stolen funds, since the FBI explicitly asked node operators to refuse TraderTraitor transactions. The project's founder defends neutrality, but pressure from authorities is growing. For European crypto-asset service providers, dealing with such protocols carries the risk that sanctioned funds reach their customers, so checking the origin of incoming transfers is essential. For users, the sudden halt is a reminder that a decentralised protocol can stop without warning, and that pending funds can stay stuck for hours or days until the node operators decide it is safe to restart.

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