THORChain experienced an interruption in its TRON operations on Oct. 9 following a USDT vault blocklist, based on disclosures from co-founder Chad Barraford and researcher Khal. The researcher estimated that the impacted balance totaled approximately 1.45 million USDT.
Subsequent updates from both accounts indicated that the restrictions were later reversed. Barraford noted at 3:35 p.m. UTC that the addresses seemed to be unfrozen and that trading would restart shortly. Shortly after, at 3:58 p.m. UTC, Khal confirmed that TRON USDT swaps had recommenced. An earlier payout queue had documented the disruption prior to the announcement that swaps were active again.
In his initial breakdown, Khal stated that block 86958330 placed four out of THORChain’s six TRON vaults on a blocklist. These specific vaults accounted for 93% of the protocol’s TRON USDT, heavily impacting the funds required to facilitate payments along that route.
According to his findings, trading, transaction signing, and liquidity-provider functions on TRON stopped roughly 27 minutes later, leaving about $363,000 in payouts stuck in the queue during the freeze.
Barraford stated that the protocol received no advance warning regarding the action and remained unaware of the underlying cause. Khal suggested the vaults may have inadvertently been swept up in a wider blocklist that affected approximately 30 additional wallets.
This event arrives on the heels of intense focus regarding the protocol’s approach to managing illicit transactions. On Oct. 8, a surge in trading volumes on THORChain for September occurred alongside activity connected to the Bitget hack, during which the protocol declined to selectively block addresses.
Two layers of control
According to documentation on THORChain’s vaults, these accounts are managed by validator nodes that secure assets on external blockchains, overseeing both incoming deposits and outgoing withdrawals.
While sharing account management among validators dictates who possesses the authority to sign off on a payment, the tokens housed within those accounts remain beholden to the rules enforced by their issuer.
THORChain highlighted a similar boundary in an Oct. 1 blog summary, explaining that while node operators possess the ability to halt an individual chain or the entire protocol for safety reasons, they are unable to selectively block a specific swap.
In parallel, Tether maintains that its wallet-freezing protocol aligns with the sanctions list maintained by OFAC and applies to secondary-market wallets. Its capacity to restrict USDT transactions functions independently from the validator mechanisms overseeing THORChain’s vaults.
Ultimately, the operational reliance remains unchanged: decentralizing the power to sign transactions does not strip Tether of its authority to freeze USDT stored within the accounts utilized by those transactions.