diff --git a/83.md b/83.md
index 7bfbba1..cace970 100644
--- a/83.md
+++ b/83.md
@@ -22,6 +22,10 @@ There are two simple clients sending json over [NIP04](https://github.com/nostr-
 
 2. `service client`: Built into service/client that wants wallet functions.
 
+### Permissions
+
+In `funding source client` nostr pubkeys used by `service client` are given and permissions granted (such as `read`/`create_invoice_only`/`pay_invoices`)
+
 ### Creating an invoice
 
 `service client` sends `create_invoice` event:
@@ -60,6 +64,8 @@ There are two simple clients sending json over [NIP04](https://github.com/nostr-
 }
 ```
 
+`funding source client` checks the pubkey has permission and attempts to pay the invoice.
+
 ### Checking a payment in/out
 
 `service client` sends `check_payment` event: