NFT marketplace OpenSea has recently launched a new system that will assist users to clear any unclaimed sales offers.

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The implementation of the new system comes after a bug on the OpenSea platform allowing attackers to exploit old contracts of users to purchase tokens for hundreds of thousands of dollars below its market price.

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The system bug was a result of how OpenSea’s platform interacted with the Ethereum blockchain which to save gas fees list offers of tokens locally rather than coding them into a broader blockchain. The oversight within the system allowed old contracts to linger on a blockchain without becoming apparent in OpenSea’s platform interface. This allowed attackers to take advantage of the outdated prices by making offers against them.

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The CEO of OpenSea, Devin Pinzer, has explained in a recent blog post that the changes in their systems are to ensure that any old, inactive listings expire as well as offer new features to its users to prevent any more exploitations of old contracts. The new system will allow users to cancel any unfilled contracts. Another change in OpenSea’s system will make signatures much clearer to prevent OpenSea’s users from mistaking contract terms.

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OpenSea’s upgraded system is expected to fully roll out within 15 days. Once it is fully rolled out, users will be asked to switch their accounts onto their new system.

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