THORChain's TRON operations were interrupted on Oct. 9 after a USDT vault blocklist, according to reports by its co-founder Chad Barraford and researcher Khal. The researcher put the affected balance at about 1.45 million USDT.

Both accounts later reversed the restrictions, according to updates from both accounts. At 3:35 p.m. UTC, Barraford said the addresses appeared unfrozen, and trading would resume soon. At 3:58 p.m. UTC, Khal reported that TRON USDT swaps had resumed. The earlier payout queue describes the interruption before the reported resumption of swaps.

In his initial analysis, Khal reported that block 86958330 blocklisted four of THORChain's six TRON vaults. Those vaults held 93% of the protocol's TRON USDT, concentrating the disruption in the balances needed to process payments on that route.

He reported that TRON trading, transaction signing, and liquidity-provider actions halted about 27 minutes later, with roughly $363,000 in payouts queued during the freeze.

Barraford said the protocol received no communication before the action and didn't know why it happened. Khal argued that the vaults may have been caught in a broader blocklist that included roughly 30 other wallets.

The incident follows scrutiny of how the protocol handles illicit flows. On Oct. 8, THORChain's September trading surge coincided with Bitget-hack-linked activity, and the protocol refused to selectively block addresses.

THORChain's vault documentation describes accounts managed by validator nodes that hold assets on external blockchains and handle incoming funds and outgoing transactions.

Distributing control of those accounts among validators determines who can authorize a payment, while the tokens inside them remain subject to their issuer's restrictions.

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