Server Setup

Follow this steps carefully to setup sender server

Create new Apps Script project

• Go to Apps Script
• Create new project

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• Rename Project
• Go to Project Settings

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• Enable Show "appsscript.json" manifest file in editor

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• Go to appsscript.json
• Add this field "oauthScopes": [ "https://www.googleapis.com/auth/script.external_request" ]
• Save file

Setup script credentials

• Paste server script template to your .gs file
• Set your SECRET_KEY

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• Go to Firebase Console
• Open Settings

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• Copy Project ID and paste it into your Script

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• Go to Service Accounts tab

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• Generate new private key
• Download private key json

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• Paste your full private key json into SERVICE_ACCOUNT variable

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• After setting all 3 variables Save file
• Select testSetup() method
• Run script

Test your script

• On first test run you have to authorize permission
• Click on Review Permission

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• Click Advance

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• Click Go to FCM Sender Server (unsafe)

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• Click Continue to approve permissions

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Test Result

If test result shows FCM response: 400 • Auth OK that means your script is ready to deploy

Project Deployment

• Click Deploy
• Click on New Deployment

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• Click on Gear icon
• Select Web App

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• Add Description
• Keep Execute as ME
• Select Access to Anyone

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Project deployed successfully. Copy Web Url and use it on Extension