75b9f71d45
The `mounted` state was used to derive state from props before the first render of the Home component. Instead this state is now derived in the constructor, which is also run before the first render. This should behave exactly the same, except now we don't need the `mounted` state or the `deriveStateFromProps` function anymore. The call to `closeCurrentWindow` that was made in `componentDidUpdate` has been moved to the constructor as well. There is no need to delay that call, and this saves us from having to compare current with previous state in that lifecycle function. |
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| .circleci | ||
| .github | ||
| .storybook | ||
| app | ||
| development | ||
| docs | ||
| lavamoat | ||
| patches | ||
| shared | ||
| test | ||
| ui | ||
| .depcheckrc.yml | ||
| .editorconfig | ||
| .eslintrc.js | ||
| .gitattributes | ||
| .gitignore | ||
| .metamaskrc.dist | ||
| .mocharc.js | ||
| .nvmrc | ||
| .prettierignore | ||
| .prettierrc.yml | ||
| .yarnrc | ||
| babel.config.js | ||
| CHANGELOG.md | ||
| crowdin.yml | ||
| jest.config.js | ||
| jest.stories.config.js | ||
| jsconfig.json | ||
| LICENSE | ||
| nyc.config.js | ||
| package.json | ||
| README.md | ||
| stylelint.config.js | ||
| yarn.lock | ||
MetaMask Browser Extension
You can find the latest version of MetaMask on our official website. For help using MetaMask, visit our User Support Site.
For general questions, feature requests, or developer questions, visit our Community Forum.
MetaMask supports Firefox, Google Chrome, and Chromium-based browsers. We recommend using the latest available browser version.
For up to the minute news, follow our Twitter or Medium pages.
To learn how to develop MetaMask-compatible applications, visit our Developer Docs.
To learn how to contribute to the MetaMask project itself, visit our Internal Docs.
Building locally
- Install Node.js version 14
- If you are using nvm (recommended) running
nvm usewill automatically choose the right node version for you.
- If you are using nvm (recommended) running
- Install Yarn
- Install dependencies:
yarn setup(not the usual install command) - Copy the
.metamaskrc.distfile to.metamaskrc- Replace the
INFURA_PROJECT_IDvalue with your own personal Infura Project ID. - If debugging MetaMetrics, you'll need to add a value for
SEGMENT_WRITE_KEYSegment write key.
- Replace the
- Build the project to the
./dist/folder withyarn dist.
Uncompressed builds can be found in /dist, compressed builds can be found in /builds once they're built.
See the build system readme for build system usage information.
Contributing
Development builds
To start a development build (e.g. with logging and file watching) run yarn start.
React and Redux DevTools
To start the React DevTools, run yarn devtools:react with a development build installed in a browser. This will open in a separate window; no browser extension is required.
To start the Redux DevTools Extension:
- Install the package
remotedev-serverglobally (e.g.yarn global add remotedev-server) - Install the Redux Devtools extension.
- Open the Redux DevTools extension and check the "Use custom (local) server" checkbox in the Remote DevTools Settings, using the default server configuration (host
localhost, port8000, secure connection checkbox unchecked).
Then run the command yarn devtools:redux with a development build installed in a browser. This will enable you to use the Redux DevTools extension to inspect MetaMask.
To create a development build and run both of these tools simultaneously, run yarn start:dev.
Test Dapp
This test site can be used to execute different user flows.
Running Unit Tests and Linting
Run unit tests and the linter with yarn test. To run just unit tests, run yarn test:unit.
You can run the linter by itself with yarn lint, and you can automatically fix some lint problems with yarn lint:fix. You can also run these two commands just on your local changes to save time with yarn lint:changed and yarn lint:changed:fix respectively.
Running E2E Tests
Our e2e test suite can be run on either Firefox or Chrome. In either case, start by creating a test build by running yarn build:test.
Firefox e2e tests can be run with yarn test:e2e:firefox.
Chrome e2e tests can be run with yarn test:e2e:chrome, but they will only work if you have Chrome v79 installed. Update the chromedriver package to a version matching your local Chrome installation to run e2e tests on newer Chrome versions.
Changing dependencies
Whenever you change dependencies (adding, removing, or updating, either in package.json or yarn.lock), there are various files that must be kept up-to-date.
yarn.lock:- Run
yarn setupagain after your changes to ensureyarn.lockhas been properly updated. - Run
yarn yarn-deduplicateto remove duplicate dependencies from the lockfile.
- Run
- The
allow-scriptsconfiguration inpackage.json- Run
yarn allow-scripts autoto update theallow-scriptsconfiguration automatically. This config determines whether the package's install/postinstall scripts are allowed to run. Review each new package to determine whether the install script needs to run or not, testing if necessary. - Unfortunately,
yarn allow-scripts autowill behave inconsistently on different platforms. macOS and Windows users may see extraneous changes relating to optional dependencies.
- Run
- The LavaMoat policy files. The tl;dr is to run
yarn lavamoat:autoto update these files, but there can be devils in the details. Continue reading for more information.- There are two sets of LavaMoat policy files:
- The production LavaMoat policy files (
lavamoat/browserify/*/policy.json), which are re-generated usingyarn lavamoat:background:auto.- These should be regenerated whenever the production dependencies for the background change.
- The build system LavaMoat policy file (
lavamoat/build-system/policy.json), which is re-generated usingyarn lavamoat:build:auto.- This should be regenerated whenever the dependencies used by the build system itself change.
- The production LavaMoat policy files (
- Whenever you regenerate a policy file, review the changes to determine whether the access granted to each package seems appropriate.
- Unfortunately,
yarn lavamoat:autowill behave inconsistently on different platforms. macOS and Windows users may see extraneous changes relating to optional dependencies. - Keep in mind that any kind of dynamic import or dynamic use of globals may elude LavaMoat's static analysis. Refer to the LavaMoat documentation or ask for help if you run into any issues.
- There are two sets of LavaMoat policy files:
Architecture
