This is a demo web-app for demonstrating how HollowDB can be used for storing profiles on-chain without revealing any information about your wallet address and have the complete control over the data.
This demo tries to highlight 2 key points of HollowDB and provides an example code base to get started with HollowDB and generating zk-proofs in browser.
Each key in the key-value pair represents a hashed signature of a specific message. This hashed signature is untraceable, meaning it is impossible to identify them, ensuring that users can maintain their anonymity while storing their data.
Anonimity of the transaction is achieved through using another wallet to do the transaction. This demo uses a server with a wallet to execute the given transactions
Here is a transaction I've created earlier, check it out yourself and try to find any connection to my address.
The hashed signature also has a crucial role in data management. Because the key is tied to a specific hashed signature, only the original signer, who holds the private key, can update the information. This is achieved by generating a zk-proof because a valid proof requires the pre-image of the hashed signature.
This mechanism provides users with exclusive control over their on-chain data, ensuring that they can manage their presence securely and independently.
This means you cannot change a value put with someone else's key. There is a Can't be Changed section on the frontend, it has a input box for you to try and change an existing key by inputting the pre-image of the key. Best of luck!
The following must be provided to the express server:
- A HollowDB contract tx address
- Clone the HollowDB repo and deploy a contract. Refer to the HollowDB docs for more information
- Alternatively, here is a contract address if you don't want to deploy it yourself:
Dh2aTDs1BV-d-8KYNoK_hil0D25_nTe7-1M1Uvh2wTg
- A JWK wallet to sign the transactions
- You can create/retrieve a JWK file from Arweave Wallet
- Clone the repo recursively, this repo contains the express server as a submodule
git clone git@github.com:merdoyovski/hollowdb-next-auth.git --recursive- Run the frontend
cd hollowdb-next-auth
yarn
yarn dev- Open a new terminal and install the dependencies for the backend
cd hollowdb-next-auth/hollowdb-express
yarn- Place a wallet
A wallet must be provided for backend server to sign the transactions.
Rename your wallet to wallet.json and place your it to the following directory hollowdb-next-auth/hollowdb-express/src/secrets
- Start the backend Server
Refer to the Prerequisites section for the
yarn start <contract-address>If you have any questions related to this demo or HollowDB, join our Discord channel.