multi: apply the new type lntypes.WeightUnit

sweep/weight_estimator.go

@@ -5,6 +5,7 @@ import (
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/wire"
 	"github.com/lightningnetwork/lnd/input"
+	"github.com/lightningnetwork/lnd/lntypes"
 	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
 )
 
@@ -15,7 +16,7 @@ type weightEstimator struct {
 	feeRate       chainfee.SatPerKWeight
 	parents       map[chainhash.Hash]struct{}
 	parentsFee    btcutil.Amount
-	parentsWeight int64
+	parentsWeight lntypes.WeightUnit
 
 	// maxFeeRate is the max allowed fee rate configured by the user.
 	maxFeeRate chainfee.SatPerKWeight
@@ -102,7 +103,7 @@ func (w *weightEstimator) addOutput(txOut *wire.TxOut) {
 }
 
 // weight gets the estimated weight of the transaction.
-func (w *weightEstimator) weight() int {
+func (w *weightEstimator) weight() lntypes.WeightUnit {
 	return w.estimator.Weight()
 }
 
@@ -111,7 +112,7 @@ func (w *weightEstimator) weight() int {
 // parent transactions.
 func (w *weightEstimator) fee() btcutil.Amount {
 	// Calculate the weight of the transaction.
-	weight := int64(w.estimator.Weight())
+	weight := w.estimator.Weight()
 
 	// Calculate the fee.
 	fee := w.feeRate.FeeForWeight(weight)
@@ -123,7 +124,7 @@ func (w *weightEstimator) fee() btcutil.Amount {
 // outputs, taking into account unconfirmed parent transactions (cpfp).
 func (w *weightEstimator) feeWithParent() btcutil.Amount {
 	// Calculate fee and weight for just this tx.
-	childWeight := int64(w.estimator.Weight())
+	childWeight := w.estimator.Weight()
 
 	// Add combined weight of unconfirmed parent txes.
 	totalWeight := childWeight + w.parentsWeight