Step 1: ERPNext Webhook Trigger (New Doc Created: MR, PO, PI, Payment)

Step 2: Fetch Complete Doc (HTTP Request → ERPNext API) Output: Full JSON Doc

Step 3: Switch on Doctype (MR → Validate MR, PO → Validate PO, PI → Validate PI, Payment → Validate Payment)

Step 4: Additional Fetch (if required) (e.g., Linked Item Doc / Master Data)

Step 5: Validation Function (Validate fields, ensure MR items exist, PO matches MR, mandatory fields present)

Step 6: Apply Business Rules (Example: Auto-fill missing fields, Apply defaults, enrich data)

Step 7: ERPNext Update via HTTP (Create/Update Doc back in ERPNext)

Step 8: Logging & Alerts (Success → Log & Notify, Failure → Error Handling + Alert)