fix: keysend custom value decoding (#452)

* fix: keysend custom value decoding

* fix: test

transactions/receive_keysend_test.go

@@ -2,6 +2,7 @@ package transactions
 
 import (
 	"context"
+	"encoding/hex"
 	"strconv"
 	"testing"
 
@@ -30,7 +31,7 @@ func TestReceiveKeysendWithCustomKey(t *testing.T) {
 	tlv := []lnclient.TLVRecord{
 		{
 			Type:  696969,
-			Value: strconv.FormatUint(uint64(app.ID), 16),
+			Value: hex.EncodeToString([]byte(strconv.FormatUint(uint64(app.ID), 10))),
 		},
 	}
 	tx := lnclient.Transaction{
@@ -55,6 +56,7 @@ func TestReceiveKeysendWithCustomKey(t *testing.T) {
 	transaction, err := transactionsService.LookupTransaction(ctx, tx.PaymentHash, nil, svc.LNClient, nil)
 	assert.NoError(t, err)
 	assert.Equal(t, app.ID, *transaction.AppId)
+	assert.Equal(t, uint(1), app.ID)
 }
 
 func TestReceiveKeysend(t *testing.T) {

transactions/transactions_service.go

@@ -855,9 +855,14 @@ func (svc *transactionsService) getAppIdFromCustomRecords(customRecords []lnclie
 	app := db.App{}
 	for _, record := range customRecords {
 		if record.Type == CustomKeyTlvType {
-			customValue, err := strconv.ParseUint(record.Value, 16, 64)
+			decodedString, err := hex.DecodeString(record.Value)
 			if err != nil {
-				logger.Logger.WithError(err).Error("Failed to parse custom key TLV record")
+				logger.Logger.WithError(err).Error("Failed to parse custom key TLV record as hex")
+				continue
+			}
+			customValue, err := strconv.ParseUint(string(decodedString), 10, 64)
+			if err != nil {
+				logger.Logger.WithError(err).Error("Failed to parse custom key TLV record as number")
 				continue
 			}
 			err = svc.db.Take(&app, &db.App{