The Sandbox's metatx dependency package, for use by The Sandbox's contracts. Based on Openzeppelin ERC2771Context. This is a dependency package, and the smart contracts inside use floating pragma.

Running the project locally

Install dependencies with yarn

Testing: Use yarn test inside packages/<package> to run tests locally inside this package

For testing from root (with workspace feature) use: yarn workspace @sandbox-smart-contracts/<package> test

Coverage: Run yarn coverage

Formatting: Run yarn prettier to check and yarn prettier:fix to fix formatting errors

Linting: Run yarn lint to check and yarn lint:fix to fix static analysis errors

Package structure and minimum standards

A NOTE ON DEPENDENCIES

1. Add whatever dependencies you like inside your package; this template is for hardhat usage. OpenZeppelin contracts are highly recommended and should be installed as a dev dependency
2. For most Pull Requests there should be minimum changes to yarn.lock at root level
3. Changes to root-level dependencies are permissible, however they should not be downgraded
4. Take care to run yarn before pushing your changes
5. You shouldn't need to install dotenv since you won't be deploying inside this package (see below)

UNIT TESTING

1. Unit tests are to be added in packages/<package>/test
2. Coverage must meet minimum requirements for CI to pass
3. getSigners return an array of addresses, the first one is the default deployer for contracts, under no circumstances should tests be written as deployer
4. It's permissible to create mock contracts at packages/<package>/contracts/mock e.g. for third-party contracts
5. Tests must not rely on any deploy scripts from the deploy package; your contracts must be deployed inside the test fixture. See test/fixtures.ts

Deployment

Each package must unit-test the contracts by running everything inside the hardhat node. Deployment to "real" networks, configuration of our environment and integration tests must be done inside the deploy package.

The deploy package only imports .sol files. The idea is to recompile everything inside it and manage the entire deploy strategy from one place.

1. Your deploy scripts should not be included inside packages/<package>: deploy scripts live inside packages/deploy/
2. The deploy package doesn't use the hardhat config file from the specific package. Instead, it uses packages/deploy/hardhat.config.ts
3. You will need to review packages/deploy/hardhat.config.ts and update it as needed for any new namedAccounts you added to your package
4. When it comes to deploy time, it is preferred to include deploy scripts and end-to-end tests as a separate PR
5. The named accounts inside the deploy package must use the "real-life" values
6. Refer to the readme at packages/deploy to learn more about importing your package

INTEGRATION TESTING

1. End-to-end tests live at packages/deploy/
2. You must add end-to-end tests ahead of deploying your package. Importantly, these tests should verify deployment and initialization configuration

A NOTE ON MAKING PULL REQUESTS

1. Follow the PR template checklist
2. Your PR will not be approved if the above criteria are not met