Decentralized finance (DeFi) project Compound has paid users several million dollars in its own tokens above the stated amount due to a bug.
It should be noted that Compound rewards its users for interacting with the protocol, however, generally the payout usually does not exceed a small percentage. The controller's contract, in which the problem was discovered, is responsible for the distribution of remuneration. Compound founder Robert Leshner has written:
"A few hours ago, Proposal 62 went into effect, updating the Comptroller contract, which distributes COMP to users of the protocol. The new Comptroller contract contains a bug, causing some users to receive far too much COMP."
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At the same time, Leshner has assured users that their assets are not at risk:
"The only risk is that you (or another user) receives an unfairly large quantity of COMP."
The proposal that caused the error was prepared by one of the community members and then reviewed by many other members. Due to the fact that Compound's devs have no administrative authority, changes can only be made through a decentralized decision-making process that takes seven days.
Leshner estimates that in a worst-case scenario, the damage to the project will be 280,000 COMP (approximately $83 million).