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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.