acheremisov/voipms-groudwire-cloudflare-worker

voip.ms and Groundwire integration via Cloudlare Workers implementation

Balance checker for voip.ms at Acrobits Groundwire iOS app

Cloudflare Worker to expose voip.ms API in Groundwire format. Build it as a side project to practice knowledge in Github, Node, Express, etc. If you see any opportunity for optimization - pull requests are welcome.

sequenceDiagram
    participant GA as Groundwire App
    participant D as Cloudflare Worker
    participant A as voip.ms API
    GA->>D: Check balance
    Note over D: Authenticate <br/> against voip.ms API
    D->>A: Issue API call to voip.ms
    Activate A
    A->>D: Return balance as float (12.123432)
    Deactivate A
    Note over D: Process number and add currency
    D->>GA: Return formatted balance

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Deployment

voip.ms

1. Go to voip.ms API page and configure API password.
2. Enable API by clicking Enable/Disable API. Make sure that it shows Enabled
3. Configure IP address of the host where your Docker container will be deployed. If you don't have static IP you can configure 0.0.0.0 to allow access from all IPs, but it presents serious security risk.

P.S. After lengthy conversation with voip.ms support team, I could not find the way to permit Cloudflare ranges access only.

Cloudflare

Add variable VOIP_PASSWORD as a secret via wrangler secret put VOIP_PASSWORD (You have to have wrangler installed. You still will need it installed to deploy the CF Worker)

Groundwire iOS App

Configure in Groundwire settings

Settings -> Select voip.ms number -> Advanced Settings -> Web Services -> Balance Checker

Groundwire screenshot