ChainCatcher message, Ethereum co-founder Vitalik Buterin announced a "Sublinear Staking Contract Vulnerability Bounty" on Bountycaster, with a total bounty amount of 2 ETH for identifying any errors/vulnerabilities in the contract and providing specific suggestions for fixes. If multiple issues are found, the bounty will be distributed based on severity.The specific requirements are: in the released Sublinear Staking Contract, if a user is on the whitelist (designated as an ERC1155 collection), then they can stake N tokens, and each slot will earn N ** 0.75 tokens in return, as long as the contract has tokens to pay it. There is a fundedUntil mechanism to ensure that if the contract runs out of money, each staker will receive rewards for each period before the fundedUntil timestamp, and this mechanism will not turn into a fractional reserve.