The TimeCapsule is created using fresh FEVM that just came out on the Mainnet. The idea is to give users the ability to create a time capsule with specific data and an expiration date that could be unlocked by the special NFT. As NFTs could be transferred easily among the accounts on the blockchain, this gives the market a great opportunity to speculate on what could be in a specific TimeCapsule. Because the data that is stored on the filecoin providers is not encrypted, it is essential to design a special algorithm that will only expose the data to the owner of the NFT at a specific time. This project covers all the necessary features of the new FEVM as we use both the power of the solidity smart-contracts and the resilience of the original filecoin infrastructure.
In the start of the creation process, the creator would be asked to provide the initial data and the date of exposure when it could be revealed.
Let's consider the initial data as idata and the date of exposure as edate.
After that, the idata would be encrypted by the special algorithm, and the encrypted data (edata) would be stored on the ipfs node for future transfer to storage providers. The request would be sent to storage providers to store the edata until the edate + n. Where n is the maximum number of days of data retrieval after the edate occurred. After the successful storage deal with one of the providers, the edata would be deleted from the ipfs node, and the creator would receive an NFT that would work as a key. After the edate, the owner of NFT would use it to decrypt the stored edata from the FVM into idata.