480a95ffbe
Anywhere we are adding/accessing an identity commitment, we need to replace it with the hash of the identityCommitment and the userMessageLimit together. Here is how to use the hasher I added: ```ts getRateCommitmentHash( BigInt(identityCommitment), BigInt(room.userMessageLimit ? room.userMessageLimit : 1) ).toString() ``` We need to add this to `addIdentityToIdentityListRooms` and `addIdentityToBandadaRooms` when users join. We also need to add this to the `/rooms/:idc` route, where we have to hash the idc with every rooms `userMessageLimit` to see what rooms they are in. (OR we can make another database model to map identity commitments to rooms, this is probably smarter and would prevent someone from trying to DDOS our server just by requesting what rooms they are in, hashing takes a decent bit of CPU when you do it a lot).
Discreetly is an anonymous, gated, chat application. Under the hood it uses a multiple zero-knowledge protocols such as RLN (Rate-Limiting Nullifier) to rate limit messages and Semaphore for identity management and group membership.
📖 Contents
📚 Technologies
Semaphore
Semaphore Identities are the core of Rate Limiting Nullifiers (RLN), CryptKeeper, and Bandada, providing support for anonymous signalling and experimental voting mechanisms within each chat room.
RLNjs
Rate Limiting Nullifier (RLN) is used to control the frequency of user interactions, thereby providing a robust mechanism to prevent spam.
Bandada
Bandada is employed for the management of user and group interactions within Semaphore Identity Commitments.
Express.js
MongoDB
Prisma
SocketIO
📖 Getting started
See the frontend to set that up as well
Install dependencies
npm i
Set environment variables given in the .env.example
PASSWORD= //password for admin endpoints
NODE_ENV= //development
DATABASE_URL= //MongoDB Atlas URL
DATABASE_URL_TEST= //MongoDB Atlas URL same as above or a seperate cluster for testing
Initialize Prisma
npx prisma db init && npx prisma db push
Run the server
npm run dev
Server information and endpoints will display in the console in development mode
Running tests
npm run test
🔩 Usage
| Endpoint | Expected Response |
|---|---|
[ '/', '/api' ] |
Status: 200 OK |
[ '/rooms/:idc', '/api/rooms/:idc' ] |
Status: 200 OK |
[ '/room/:id', '/api/room/:id' ] |
Status: 200 OK |
[ '/join', '/api/join' ] |
Status: 200 OK |
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