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67 lines
3.6 KiB
Markdown
67 lines
3.6 KiB
Markdown
# Tornado.cash Trusted Setup Ceremony app
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> zk-SNARKs require a pre-existing setup between the prover and verifier. A set of public parameters define the “rules of the game” for the construction of zk-SNARKs. This app allows everyone to contribute with your source of entropy so that tornado.cash can be trustless.
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## Environment variables
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The app can use `.env.development` and `.env.production`. What file will be used depends on `NODE_ENV` variable.
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For command `yarn dev` the `.env.development` is used. The `yarn start` uses `.env.production`.
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| ENV_VAR | Description |
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| --- | --- |
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| DISABLE_S3 | Disable contributions uploading to AWS S3. `true` or `false` |
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| AWS_ACCESS_KEY_ID | AWS access key |
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| AWS_SECRET_ACCESS_KEY | AWS secret key |
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| AWS_S3_BUCKET | AWS S3 bucket where the contributions will be uploaded |
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| MYSQL_USER | Mysql user the app uses. Notice, you don't need mysql db for development. The app will use local sqlite db in dev mode. Local db is stored in `db.development.sqlite` file. |
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| MYSQL_PASSWORD | Mysql password for MYSQL_USER |
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| MYSQL_DATABASE | Mysql database |
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| TWITTER_CONSUMER_KEY | Twitter consumer API key. [Twitter app](https://developer.twitter.com/en/apps) |
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| TWITTER_CONSUMER_SECRET | Twitter consumer API secret |
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| TWITTER_CALLBACK_URL | Twitter callback URL. The app handles the `/api/oauth_callback/twitter` endpoint. Feel free to change domain name and protocol though |
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| GITHUB_CLIEND_ID | Github client id. [How to create Github OAuth app](https://developer.github.com/apps/building-oauth-apps/creating-an-oauth-app/) |
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| GITHUB_CLIENT_SECRET | Github client secret |
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| GITHUB_CALLBACK_URL | Github callback URL. The app handles the `/api/oauth_callback/github` endpoint. Feel free to change domain name and protocol though |
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| SESSION_SECRET | A random string that will be used by [express-session](https://www.npmjs.com/package/express-session#secret) to sign the session ID cookie. |
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## Development setup
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``` bash
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$ yarn install
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# Edit all necessary environment variables. See the explanation above.
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$ cp .env.example .env.development
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# serve with hot reload at localhost:3000
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$ yarn dev
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```
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## Production setup
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Follow instructions in the [Initialize ceremony](#initialize-ceremony-currentparams-file-creation) section to generate `current.params` ceremony file.
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``` bash
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# Edit all necessary environment variables. See the explanation above.
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$ cp .env.example .env.production
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# Run Nginx + Letsencrypt containers to serve https requests to the app
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$ cd frontend
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$ docker-compose up -d
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$ cd ..
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# Set VIRTUAL_HOST and LETSENCRYPT_HOST variables in the app's docker-compose.yml file
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# Run the app and mysql database containers. It will use the MYSQL_USER, MYSQL_PASSWORD and MYSQL_DATABASE vars you specified in .env.production file.
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$ docker-compose up -d
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```
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## Initialize ceremony (`current.params` file creation):
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1. `git clone https://github.com/tornadocash/phase2-bn254 && cd phase2-bn254`
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1. `git checkout wasm`
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1. go to `./powersoftau/src/bn256/mod.rs` and change `REQUIRED_POWER` to 15 (it's going to fit 36k constaints snark)
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1. `cd powersoftau`
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1. run `./test.sh`. After this step you will get many `phase1radix*` files.
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1. Download [withdraw.json](https://github.com/tornadocash/tornado-core/releases/download/v2.0/withdraw.json) for required circuit to `./phase2` folder
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1. `cd ../phase2`
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1. `cp ../powersoftau/phase1radix* .`
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1. `cargo run --release --bin new withdraw.json current.params`
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1. The `current.params` file is your initial challenge file.
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1. copy `current.params`, `withdraw.json` and `phase1radix*` to `./server/snark_files` folder.
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1. `mv withdraw.json circuit.json`
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