Hackers exploited a range-proof bug in Blockstream's Liquid Network, draining 4,000 BTC worth $320M. White-hat attackers returned most funds but

Nearly 4,000 BTC reportedly left Liquid’s federation wallet as an onchain message claimed, “we are whitehats.”

Liquid pauses its network after roughly 4,000 BTC worth $320M is withdrawn from the federation wallet in a security incident.