JPY to EUR Exchange Rate Checker

This GitHub Actions workflow fetches the latest JPY to EUR exchange rate every Monday at midnight (UTC) and sends an email notification if the rate falls below a specified threshold.

🚀 How It Works

1. Fetches the JPY to EUR exchange rate from ExchangeRate-API.
2. Logs the exchange rate and compares it to the previous value.
3. Sends an email alert if the rate is below the set threshold.

🛠 Setup Instructions

1️⃣ Add Secrets to GitHub

Go to Settings → Secrets and variables → Actions → New repository secret, and add:

Secret Name	Description
EXCHANGE_API_KEY	API key for exchange rate service (if needed)
SMTP_USER	Your SMTP email address
SMTP_PASSWORD	Your SMTP email password (or app password)
SMTP_SERVER	SMTP server address (e.g., smtp.gmail.com)
SMTP_PORT	SMTP port (e.g., 587 for TLS)
RECIPIENT_EMAIL	The email address to receive alerts
PRICE_THRESHOLD	The exchange rate threshold for alerts (e.g., 0.0065)

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3️⃣ Manually Trigger the Workflow

You can also run the workflow manually:

1. Go to Actions in your GitHub repository.
2. Select Weekly JPY to EUR Rate Check.
3. Click Run workflow.

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🔧 Dependencies

The R script requires:

• httr
• jsonlite
• emayili

These are automatically installed when the workflow runs.

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📄 Logs & Debugging

• Exchange rates are logged in exchange_rate_log.txt.
• To debug, check the GitHub Actions logs under Actions → Workflow Runs.

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📧 Email Notifications

• If the exchange rate falls below the threshold, an email is sent.
• The email includes the current rate and percentage change from the last logged value.

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🏆 Future Improvements

• ✅ Add more exchange rate APIs for redundancy.
• ✅ Improve email formatting.
• 🗄 Store logs in a more structured format (e.g., CSV or database).

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🌟 License

This project is open-source under the MIT License.