NIP-47: mark "state" field as optional in make_invoice response for backward compatibility (#2046)

Author: riccardobl

47.md

@@ -335,7 +335,7 @@ Response:
     "result_type": "make_invoice",
     "result": {
         "type": "incoming", // "incoming" for invoices, "outgoing" for payments
-        "state": "pending",
+        "state": "pending", // optional
         "invoice": "string", // encoded invoice, optional
         "description": "string", // invoice's description, optional
         "description_hash": "string", // invoice's description hash, optional
@@ -369,7 +369,7 @@ Response:
     "result_type": "lookup_invoice",
     "result": {
         "type": "incoming", // "incoming" for invoices, "outgoing" for payments
-        "state": "pending", // can be "pending", "settled", "expired" (for invoices) or "failed" (for payments)
+        "state": "pending", // can be "pending", "settled", "expired" (for invoices) or "failed" (for payments), optional
         "invoice": "string", // encoded invoice, optional
         "description": "string", // invoice's description, optional
         "description_hash": "string", // invoice's description hash, optional
@@ -418,7 +418,7 @@ Response:
         "transactions": [
             {
                "type": "incoming", // "incoming" for invoices, "outgoing" for payments
-               "state": "pending", // can be "pending", "settled", "expired" (for invoices) or "failed" (for payments)
+               "state": "pending", // can be "pending", "settled", "expired" (for invoices) or "failed" (for payments), optional
                "invoice": "string", // encoded invoice, optional
                "description": "string", // invoice's description, optional
                "description_hash": "string", // invoice's description hash, optional
@@ -495,7 +495,7 @@ Notification:
     "notification_type": "payment_received",
     "notification": {
         "type": "incoming",
-        "state": "settled",
+        "state": "settled", // optional
         "invoice": "string", // encoded invoice
         "description": "string", // invoice's description, optional
         "description_hash": "string", // invoice's description hash, optional
@@ -521,7 +521,7 @@ Notification:
     "notification_type": "payment_sent",
     "notification": {
         "type": "outgoing",
-        "state": "settled",
+        "state": "settled", // optional
         "invoice": "string", // encoded invoice
         "description": "string", // invoice's description, optional
         "description_hash": "string", // invoice's description hash, optional