lnrpc: populate new AmpInvoiceState field in CreateRPCInvoice

lnrpc/lightning.swagger.json

@@ -2838,6 +2838,30 @@
       },
       "description": "Details specific to AMP HTLCs."
     },
+    "lnrpcAMPInvoiceState": {
+      "type": "object",
+      "properties": {
+        "state": {
+          "$ref": "#/definitions/lnrpcInvoiceHTLCState",
+          "description": "The state the HTLCs associated with this setID are in."
+        },
+        "settle_index": {
+          "type": "string",
+          "format": "uint64",
+          "description": "The settle index of this HTLC set, if the invoice state is settled."
+        },
+        "settle_time": {
+          "type": "string",
+          "format": "int64",
+          "description": "The time this HTLC set was settled expressed in unix epoch."
+        },
+        "amt_paid_msat": {
+          "type": "string",
+          "format": "int64",
+          "description": "The total amount paid for the sub-invoice expressed in milli satoshis."
+        }
+      }
+    },
     "lnrpcAMPRecord": {
       "type": "object",
       "properties": {
@@ -4755,11 +4779,19 @@
         "payment_addr": {
           "type": "string",
           "format": "byte",
-          "description": "The payment address of this invoice. This value will be used in MPP\npayments, and also for newer invoies that always require the MPP paylaod\nfor added end-to-end security."
+          "description": "The payment address of this invoice. This value will be used in MPP\npayments, and also for newer invoices that always require the MPP payload\nfor added end-to-end security."
         },
         "is_amp": {
           "type": "boolean",
           "description": "Signals whether or not this is an AMP invoice."
+        },
+        "amp_invoice_state": {
+          "type": "object",
+          "additionalProperties": {
+            "$ref": "#/definitions/lnrpcAMPInvoiceState"
+          },
+          "description": "Maps a 32-byte hex-encoded set ID to the sub-invoice AMP state for the\ngiven set ID. This field is always populated for AMP invoices, and can be\nused along side LookupInvoice to obtain the HTLC information related to a\ngiven sub-invoice.",
+          "title": "[EXPERIMENTAL]:"
         }
       }
     },