# <h1 align="center"> Optimism Monorepo </h1>

**Monorepo implementing the Optimistic Ethereum protocol**

[![Github Actions](https://github.com/ethereum-optimism/optimism/workflows/typescript%20/%20contracts/badge.svg)](https://github.com/ethereum-optimism/optimism/actions/workflows/ts-packages.yml?query=branch%3Amaster)
[![Github Actions](https://github.com/ethereum-optimism/optimism/workflows/integration/badge.svg)](https://github.com/ethereum-optimism/optimism/actions/workflows/integration.yml?query=branch%3Amaster)
[![Github Actions](https://github.com/ethereum-optimism/optimism/workflows/geth%20unit%20tests/badge.svg)](https://github.com/ethereum-optimism/optimism/actions/workflows/geth.yml?query=branch%3Amaster)

## Documentation

Extensive documentation is available [here](http://community.optimism.io/docs/)

## Directory Structure

* [`packages`](./packages): Contains all the typescript packages and contracts
    * [`contracts`](./packages/contracts): Solidity smart contracts implementing the OVM
    * [`core-utils`](./packages/core-utils): Low-level utilities and encoding packages
    * [`hardhat-ovm`](./packages/hardhat-ovm): Hardhat plugin which enables the [OVM Compiler](https://github.com/ethereum-optimism/solidity)
    * [`smock`](./packages/smock): Testing utility for mocking smart contract return values and storage
    * [`data-transport-layer`](./packages/data-transport-layer): Event indexer, allowing the `l2geth` node to access L1 data
    * [`batch-submitter`](./packages/batch-submitter): Daemon for submitting L2 transaction and state root batches to L1
    * [`message-relayer`](./packages/message-relayer): Service for relaying L2 messages to L1
* [`l2geth`](./l2geth): Fork of [go-ethereum v1.9.10](https://github.com/ethereum/go-ethereum/tree/v1.9.10) implementing the [OVM](https://research.paradigm.xyz/optimism#optimistic-geth).
* [`integration-tests`](./integration-tests): Integration tests between a L1 testnet, `l2geth`,
* [`ops`](./ops): Contains Dockerfiles for containerizing each service involved in the protocol, 
as well as a docker-compose file for bringing up local testnets easily

## Quickstart

### Installation

Dependency management is done using `yarn`. 

```bash
git clone git@github.com:ethereum-optimism/optimism.git
cd optimism
yarn
```

After installing the dependencies, you must also build them so that the typescript
is compiled down to javascript:

```bash
yarn build
```

### Unit tests

All tests are run in parallel using `lerna`:

```bash
yarn test
```

When you want to run tests only for packages that have changed since `master` (or any other branch)
you can run `yarn lerna run test --parallel --since master`

### Integration Tests

#### Running the integration tests

The integration tests first require bringing up the Optimism stack. This is done via
a Docker Compose network. For better performance, we also recommend enabling Docker 
BuildKit

```bash
cd ops
export COMPOSE_DOCKER_CLI_BUILD=1
export DOCKER_BUILDKIT=1
docker-compose build
docker-compose up -d
cd ../integration-tests
yarn test:integration
```

#### Locally testing and re-building specific services

If you want to make changes to any of the containers, you'll have to bring one down,
rebuild it, and then bring it back up.

For example, if you make a change in l2geth:

```bash
cd ops
docker-compose stop -- l2geth
docker-compose build -- l2geth
docker-compose start l2geth
```

For the typescript services, you'll need to rebuild the `builder` so that the compiled
files are re-generated, and then your service, e.g. for the batch submitter

```bash
cd ops
docker-compose stop -- batch_submitter
docker-compose build -- builder batch_submitter
docker-compose start batch_submitter
```
