COVID Trace

COVID Trace is a mobile app that use the Google/Apple Exposure Notification APIs to alert users to potential COVID-19 exposures.

Main features:

• Integrates with the reference Google Exposure Notification Server
• Has support for verifying positive COVID-19 diagnosis from authorized health authorities.
• Is easily customizable for the specific needs of local governments and health organizations.

Local Setup

The app is build on the Flutter framework for both iOS and Android. Follow the local development setup guide here: https://flutter.dev/docs/get-started/install

The app relies on a combination of local and remote JSON configuration. Be sure to edit assets/config.json to specify your remote configuration URL. Here's the minimum remote configuration you must specify:

{
  "exposurePublishUrl": "http://localhost:8080",
  "exposureKeysPublishedBucket": "covidtrace-exposure-keys-published",
  "exposureKeysPublishedIndexFile": "exposure-keys/index.txt",
  "exposureNotificationConfiguration": {
    "minimumRiskScore": 0,
    "attenuationLevelValues": [1, 2, 3, 4, 5, 6, 7, 8],
    "attenuationWeight": 50,
    "daysSinceLastExposureLevelValues": [1, 2, 3, 4, 5, 6, 7, 8],
    "daysSinceLastExposureWeight": 50,
    "durationLevelValues": [1, 2, 3, 4, 5, 6, 7, 8],
    "durationWeight": 50,
    "transmissionRiskLevelValues": [1, 2, 3, 4, 5, 6, 7, 8],
    "transmissionRiskWeight": 50
  }
}

In particular you should update exposurePublishUrl to point to your server for reporting expsoure keys. For local development, you can specify a path in the /assets directory to a "remote" configuration.

Troubleshooting

• Issue: Flutter build fails for iOS after building and running via Xcode.

  Fix: rm -rf ios/Flutter/App.framework

• Issue: Flutter Android build get stuck trying to install debug .apk on to a device.

  Fix: /Path/to/adb uninstall com.covidtrace.app On MacOS the adb tool is typically located at ~/Library/Android/sdk/platform-tools/adb

  Make sure that you can run fluttter devices successfully afterwards. If that hangs kill any running adb processes.