invoices: accept mpp payments

lnrpc/invoicesrpc/utils.go

@@ -75,14 +75,15 @@ func CreateRPCInvoice(invoice *channeldb.Invoice,
 		}
 
 		rpcHtlc := lnrpc.InvoiceHTLC{
-			ChanId:        key.ChanID.ToUint64(),
-			HtlcIndex:     key.HtlcID,
-			AcceptHeight:  int32(htlc.AcceptHeight),
-			AcceptTime:    htlc.AcceptTime.Unix(),
-			ExpiryHeight:  int32(htlc.Expiry),
-			AmtMsat:       uint64(htlc.Amt),
-			State:         state,
-			CustomRecords: htlc.CustomRecords,
+			ChanId:          key.ChanID.ToUint64(),
+			HtlcIndex:       key.HtlcID,
+			AcceptHeight:    int32(htlc.AcceptHeight),
+			AcceptTime:      htlc.AcceptTime.Unix(),
+			ExpiryHeight:    int32(htlc.Expiry),
+			AmtMsat:         uint64(htlc.Amt),
+			State:           state,
+			CustomRecords:   htlc.CustomRecords,
+			MppTotalAmtMsat: uint64(htlc.MppTotalAmt),
 		}
 
 		// Only report resolved times if htlc is resolved.

lnrpc/rpc.proto

@@ -2407,6 +2407,9 @@ message InvoiceHTLC {
 
     /// Custom tlv records.
     map<uint64, bytes> custom_records = 9 [json_name = "custom_records"];
+
+    /// The total amount of the mpp payment in msat.
+    uint64 mpp_total_amt_msat = 10 [json_name = "mpp_total_amt_msat"];
 }
 
 message AddInvoiceResponse {

lnrpc/rpc.swagger.json

@@ -2854,6 +2854,11 @@
             "format": "byte"
           },
           "description": "/ Custom tlv records."
+        },
+        "mpp_total_amt_msat": {
+          "type": "string",
+          "format": "uint64",
+          "description": "/ The total amount of the mpp payment in msat."
         }
       },
       "title": "/ Details of an HTLC that paid to an invoice"