Development

Several files which are needed for developing on MetaMask.

Usually each file or directory contains information about its scope / usage.

Segment

Debugging with the Mock Segment API

To start the Mock Segment API:

Add/replace the SEGMENT_HOST and SEGMENT_WRITE_KEY variables in .metamaskrc
```
SEGMENT_HOST='http://localhost:9090'
SEGMENT_WRITE_KEY='FAKE'
```
Build the project to the ./dist/ folder with yarn dist
Run the Mock Segment API from the command line
```
node development/mock-segment.js
```

Events triggered whilst using the extension will be logged to the console of the Mock Segment API.

More information on the API and its usage can be found here.

Debugging in Segment

To debug in a production Segment environment:

Create a free account on Segment
Create a New Workspace
Add a Source (Node.js)
Copy the Write Key from the API Keys section under Settings

Add/replace the SEGMENT_HOST and SEGMENT_WRITE_KEY variables in .metamaskrc

SEGMENT_HOST='https://api.segment.io'
SEGMENT_WRITE_KEY='COPIED_WRITE_KEY'

Build the project to the ./dist/ folder with yarn dist

Events triggered whilst using the extension will be displayed in Segment's Debugger.

Debugging Segment requests in MetaMask

To opt in to MetaMetrics;

Unlock the extension
Open the Account menu
Click the Settings menu item
Click the Security & Privacy menu item
Toggle the Participate in MetaMetrics menu option to the ON position

You can inspect the requests in the Network tab of your browser's Developer Tools (background.html) by filtering for POST requests to /v1/batch. The full url will be http://localhost:9090/v1/batch or https://api.segment.io/v1/batch respectively.

Sentry

Debugging in Sentry

To debug in a production Sentry environment:

If you have not already got a Sentry account, you can create a free account on Sentry
Create a New Sentry Organization
- If you already have an existing Sentry account and workspace, open the sidebar drop down menu, then click Switch organization followed by Create a new organization
Create a New Project
Copy the Public Key and Project ID from the Client Keys section under your projects Settings
- Select Settings in the sidebar menu, then select Projects in the secondary menu. Click your project then select Client Keys (DSN) from the secondary menu. Click the Configure button on the Client Keys page and copy your Project Id and Public Key

Add/replace the SENTRY_DSN and SENTRY_DSN_DEV variables in .metamaskrc

SENTRY_DSN_DEV=https://{SENTRY_PUBLIC_KEY}@sentry.io/{SENTRY_PROJECT_ID}
SENTRY_DSN=https://{SENTRY_PUBLIC_KEY}@sentry.io/{SENTRY_PROJECT_ID}

Build the project to the ./dist/ folder with yarn dist

Errors reported whilst using the extension will be displayed in Sentry's Issues page.

Source Maps

Debugging production builds using Source Maps

To unbundle the extensions compiled and minified JavaScript using Source Maps:

Open Chrome DevTools to inspect the background.html or home.html view
Click on the Sources tab in Chrome DevTools
In the Sources tab, click on the Page panel
Expand the file directory in the Page panel until you see the source files you're after
Select a source file in the Page panel

chrome-extension://{EXTENSION_ID}/common-0.js

Double click the source file to open it in the Workspace
Right click in the body of the source file and select Add source map...
Enter the path to the corresponding source map file, and Click Add

file:///{LOCAL_FILE_SYSTEM}/metamask-extension/dist/sourcemaps/common-0.js.map

Repeat the steps above as necessary adding all the relevant source map files
Your source maps should now be added to the DevTools Console, and you should be able to see your original source files when you debug your code

4.0 KiB Raw Blame History