This is the blockchain contract of a project of mine, named "Minerva". An end-to-end encrypted email service powered by Solana blockchain.
I did this project mostly to learn how to implement end-to-end encryption.
The frontend is responsible for encrypting and decrypting data, while the blockchain is only used to store public information about the encryption, key exchange, and the email itself.
I used AES-256 bit with Counter Mode.
I used diffie-helmann algorithm for the key exchange, each user get a public an private key at the registration moment. Only the public key is stored on the blockchain.
First of all, open /Anchor.toml and make sure that it is pointing to your wallet and the cluster that you want to run on.
Run the following commands on your terminal, at the root of the project:
yarn
anchor build
anchor test...
├─ src
│ ├─ context.rs -> structs used on my instructions arguments
│ ├─ error.rs -> error structs
│ ├─ lib.rs -> my entrypoint, processor, and register modules
│ ├─ state.rs -> state structs
│ ├─ utils.rs -> helpers functions
...