Relayer for Tornado Cash

Getting listed on nova.tornado.cash

If you would like to be listed in nova.tornado.cash UI relayer's dropdown option, please do the following:

1. Setup tornado.cash relayer node(see below for docker-compose.yml example)
2. Setup ENS subdomain(nova.xxx.eth) with TEXT record and URL key that points to your DNS or IP address.
3. Test your relayer setup at https://nova.tornado.cash by choosing custom relayer's option on withdraw/transfer tab. Enter your ens name or url and initiate an operation.
4. Open new Github issue in https://github.com/tornadocash/tornado-pool-relayer/issues and specify the following:

• your mainnet ens url
• your telegram handle
• withdrawal tx on mainnet and xdai
• transfer tx on xdai

Please choose your testnet relayer's fee wisely.

Disclaimer: Please consult with legal and tax advisors regarding the compliance of running a relayer service in your jurisdiction. The authors of this project bear no responsibility.

USE AT YOUR OWN RISK.

Deploy with docker-compose

docker-compose.yml contains a stack that will automatically provision SSL certificates for your domain name and will add a https redirect to port 80.

1. Download docker-compose.yml and .env.example

wget https://raw.githubusercontent.com/tornadocash/tornado-relayer/master/docker-compose.yml
wget https://raw.githubusercontent.com/tornadocash/tornado-relayer/master/.env.example -O .env

2. Setup environment variables

   • set CHAIN_ID (100 for xdai, 1 for mainnet)

   • set PRIVATE_KEY for your relayer address (without 0x prefix)

   • set VIRTUAL_HOST and LETSENCRYPT_HOST to your domain and add DNS record pointing to your relayer ip address

   • set REWARD_ADDRESS - eth address that is used to collect fees

   • set RPC_URL rpc url for your node

   • set ORACLE_RPC_URL - rpc url for mainnet node for fetching prices(always have to be on mainnet)

   • set WITHDRAWAL_SERVICE_FEE - fee in % that is used for tornado withdrawals

   • set TRANSFER_SERVICE_FEE - fee is a fixed value in ether for transfer

   • set CONFIRMATIONS if needed - how many block confirmations to wait before processing an event. Not recommended to set less than 3

   • set MAX_GAS_PRICE if needed - maximum value of gwei value for relayer's transaction

     If you want to use more than 1 eth address for relaying transactions, please add as many workers as you want. For example, you can comment out worker2 in docker-compose.yml file, but please use a different PRIVATE_KEY for each worker.

3. Run docker-compose up -d

Run locally

1. npm i
2. cp .env.example .env
3. Modify .env as needed
4. yarn start:dev
5. Go to http://127.0.0.1:8000
6. In order to execute withdraw/transfer request, you can run following command

curl -X POST -H 'content-type:application/json' --data '<input data>' http://127.0.0.1:8000/transaction

Relayer should return a transaction hash

In that case you will need to add https termination yourself because browsers with default settings will prevent https tornado.cash UI from submitting your request over http connection

Architecture

• Abi: Json ABI for working with contracts
• Artifacts: The generated file contains typed contract instances
• Config:
  1. bull.config.ts bull service settings
  2. configuration.ts global application configuration
  3. txManager.config.ts txManager service settings
• Constants:
  1. contracts.ts addresses of contracts and rps
  2. variables.ts various variables to make things easier
• Modules:
  1. controller.ts Controller file that will contain all the application routes
  2. module.ts The module file essentially bundles all the controllers and providers of your application together.
  3. service.ts The service will include methods that will perform a certain operation.
  4. main.ts The entry file of the application will take in your module bundle and create an app instance using the NestFactory provided by Nest.
• Services:
  1. gas-price.ts update gas prices
  2. offchain-price.ts update the exchange rate
  3. provider.ts add-on for working with ethers js
• Types: types for the application
• Utilities: helpers functions

Disclaimer:

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.