message: contributing: note how to install foundry
diff: @@ -64,6 +64,7 @@ You'll need the following:
  * [Yarn](https://classic.yarnpkg.com/en/docs/install)
  * [Docker](https://docs.docker.com/get-docker/)
  * [Docker Compose](https://docs.docker.com/compose/install/)
  +* [Foundry](https://getfoundry.sh)
  ### Setup
  @@ -85,6 +86,10 @@ nvm use
  ### Building the TypeScript packages
  +[foundry](https://github.com/foundry-rs/foundry) is used for some smart contract
  +development in the monorepo. It is required to build the TypeScript packages
  +and compile the smart contracts. Install foundry [here](https://getfoundry.sh/).
  +
  To build all of the [TypeScript packages](./packages), run:
  ```bash
  