# Add this block inside "rules" only (do not replace your existing rules)
# Firebase project is shared with other apps — merge, don't replace.

"merchant_messages": {
  "$uid": {
    ".read": "auth != null",
    ".write": "auth != null"
  }
}

# Example if you already have other paths (customer, driver, etc.):
# {
#   "rules": {
#     "customer_messages": { ... },
#     "driver_messages": { ... },
#     "merchant_messages": {
#       "$uid": {
#         ".read": "auth != null",
#         ".write": "auth != null"
#       }
#     }
#   }
# }