The ethical exploiter thanked Arbitrium for the 400 ETH payday but said such a find should be eligible for the max bounty of nearly 1,500 ETH, or $2 million.
The cross-chain bridge was drained of its assets in less than three hours.
Owing to a security vulnerability in six tokens, Multichain users lost more than $3M over the week. A white hat hacker returned 322 ETH, but in excess of 527 ETH is still exploited.
Claims by a self professed white-hat hacker about a major security risk to SushiSwap liquidity providers have been rejected by one of the exchange’s devs.
"The poly did offered a bounty, but I have never responded to them. Instead, I will send all of their money back," said the hacker.
MakerDAO patched a "critical" bug in its upcoming Multi-Collateral Dai upgrade that could have put 10% of the system's total collateral at risk.