Splash’s Cardano-based ADA/OADA StableSwap pool was drained in two transactions on Sept. 13, removing 2,434,648 ADA and 1,988,222 OADA. After deducting the attacker’s 9,870 ADA deposit, the net ADA loss was 2,424,778 before network fees. Splash identified validator checks that could have blocked the documented exploit, including requiring a positive tradable reserve, applying two-sided fee limits and enforcing swap direction. Those changes would not restore the ADA already removed. The pool was left with 10 ADA and about 1.44 million OADA, while OADA had no protocol-level redemption and other listed venues held only single- or double-digit ADA balances. Optim Finance said its protocol was paused, remaining liquidity had been removed and OADA-to-ADA swaps were unavailable. Its Sept. 15 update described chain-indexing and accounting work but did not announce restored liquidity, redemption or operations.