This README describes how to use the actor testing library to write new tests. If you're just looking for how to run test cases, check out the README [in the root of the repo](../README.md).
## Introduction
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### Test Runner
The test runner is responsible for executing actor tests and managing their lifecycle. It can run in one of two modes:
The test runner is responsible for executing actor tests and managing their lifecycle. It can run in one of two modes:
1. Fixed run mode, which will execute the `run` method a fixed number of times.
2. Timed mode, which will will execute the `run` method as many times as possible until a period of time has elapsed.
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Test lifecycle is as follows:
1. The runner collects all the actors it needs to run.
> Actors automatically register themselves with the default instance of the runner upon being `require()`d.
2. The runner executes each actor's `setupActor` method.
The token and governance smart contracts for the Optimism DAO. Built using [OpenZeppelin libraries](https://docs.openzeppelin.com/contracts/4.x/) with some customisations. The token is an [ERC20](https://docs.openzeppelin.com/contracts/4.x/api/token/erc20) that is [permissible](https://docs.openzeppelin.com/contracts/4.x/api/token/erc20#ERC20Permit) and allows for [delegate voting](https://docs.openzeppelin.com/contracts/4.x/api/token/erc20#ERC20Votes). The token is also [burnable](https://docs.openzeppelin.com/contracts/4.x/api/token/erc20#ERC20Burnable). See more in the [Specification section](#specification).
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`@eth-optimism/contracts` contains the various Solidity smart contracts used within the Optimism system.
Some of these contracts are [meant to be deployed to Ethereum ("Layer 1")](https://github.com/ethereum-optimism/optimism/tree/develop/packages/contracts/contracts/L1), while others are [meant to be deployed to Optimism ("Layer 2")](https://github.com/ethereum-optimism/optimism/tree/develop/packages/contracts/contracts/L2).
Within each contract file you'll find the network upon which the contract is meant to be deloyed, listed as either `EVM` (for Ethereum) or `OVM` (for Optimism).
The Optimism Data Transport Layer is a long-running software service (written in TypeScript) designed to reliably index Optimism transaction data from Layer 1 (Ethereum). Specifically, this service indexes:
The `fault-detector` is a simple service for detecting discrepancies between your local view of the Optimism network and the L2 output proposals published to Ethereum.
`replica-healthcheck` is an express server to be run alongside a replica instance, to ensure that the replica is healthy. Currently, it exposes metrics on syncing stats and exits when the replica has a mismatched state root against the sequencer.
