sweep+itest: change MaxFeeRate to use SatPerVbyte

sweep/defaults.go

@@ -2,6 +2,8 @@ package sweep
 
 import (
 	"time"
+
+	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
 )
 
 var (
@@ -9,4 +11,9 @@ var (
 	// window. The sweep is held back during the batch window to allow more
 	// inputs to be added and thereby lower the fee per input.
 	DefaultBatchWindowDuration = 30 * time.Second
+
+	// DefaultMaxFeeRate is the default maximum fee rate allowed within the
+	// UtxoSweeper. The current value is equivalent to a fee rate of 1,000
+	// sat/vbyte.
+	DefaultMaxFeeRate chainfee.SatPerVByte = 1e3
 )