mulit: remove ListLeasedOutputs in LeaseOutput

This commit removes the call toe `ListLeasedOutputs` in `LeaseOutput` -
the returned info from `ListLeasedOutputs` can easily be accessed via
`FetchInputInfo` and this info is only used at one callsite.
`ListLeasedOutputs` then becomes unnecessary here, plus it's very slow
and needs to be refactored in `btcwallet` instead.

lnwallet/btcwallet/btcwallet.go

@@ -1079,36 +1079,20 @@ func (b *BtcWallet) CreateSimpleTx(inputs fn.Set[wire.OutPoint],
 //
 // NOTE: This method requires the global coin selection lock to be held.
 func (b *BtcWallet) LeaseOutput(id wtxmgr.LockID, op wire.OutPoint,
-	duration time.Duration) (time.Time, []byte, btcutil.Amount, error) {
+	duration time.Duration) (time.Time, error) {
 
 	// Make sure we don't attempt to double lock an output that's been
 	// locked by the in-memory implementation.
 	if b.wallet.LockedOutpoint(op) {
-		return time.Time{}, nil, 0, wtxmgr.ErrOutputAlreadyLocked
+		return time.Time{}, wtxmgr.ErrOutputAlreadyLocked
 	}
 
 	lockedUntil, err := b.wallet.LeaseOutput(id, op, duration)
 	if err != nil {
-		return time.Time{}, nil, 0, err
+		return time.Time{}, err
 	}
 
-	// Get the pkScript and value for this lock from the list of all leased
-	// outputs.
-	allLeases, err := b.wallet.ListLeasedOutputs()
-	if err != nil {
-		return time.Time{}, nil, 0, err
-	}
-
-	for _, lease := range allLeases {
-		if lease.Outpoint == op {
-			return lockedUntil, lease.PkScript,
-				btcutil.Amount(lease.Value), nil
-		}
-	}
-
-	// We MUST find the leased output in the loop above, otherwise something
-	// is seriously wrong.
-	return time.Time{}, nil, 0, wtxmgr.ErrUnknownOutput
+	return lockedUntil, nil
 }
 
 // ListLeasedOutputs returns a list of all currently locked outputs.

lnwallet/chanfunding/assembler.go

@@ -44,7 +44,7 @@ type OutputLeaser interface {
 	// LeaseOutput leases a target output, rendering it unusable for coin
 	// selection.
 	LeaseOutput(i wtxmgr.LockID, o wire.OutPoint, d time.Duration) (
-		time.Time, []byte, btcutil.Amount, error)
+		time.Time, error)
 
 	// ReleaseOutput releases a target output, allowing it to be used for
 	// coin selection once again.

lnwallet/chanfunding/wallet_assembler.go

@@ -525,7 +525,7 @@ func (w *WalletAssembler) ProvisionChannel(r *Request) (Intent, error) {
 		for _, coin := range selectedCoins {
 			outpoint := coin.OutPoint
 
-			_, _, _, err = w.cfg.CoinLeaser.LeaseOutput(
+			_, err = w.cfg.CoinLeaser.LeaseOutput(
 				LndInternalLockID, outpoint,
 				DefaultReservationTimeout,
 			)

lnwallet/interface.go

@@ -413,8 +413,7 @@ type WalletController interface {
 	//
 	// NOTE: This method requires the global coin selection lock to be held.
 	LeaseOutput(id wtxmgr.LockID, op wire.OutPoint,
-		duration time.Duration) (time.Time, []byte, btcutil.Amount,
-		error)
+		duration time.Duration) (time.Time, error)
 
 	// ReleaseOutput unlocks an output, allowing it to be available for coin
 	// selection if it remains unspent. The ID should match the one used to

lnwallet/mock.go

@@ -201,9 +201,9 @@ func (w *mockWalletController) ListTransactionDetails(int32, int32,
 
 // LeaseOutput returns the current time and a nil error.
 func (w *mockWalletController) LeaseOutput(wtxmgr.LockID, wire.OutPoint,
-	time.Duration) (time.Time, []byte, btcutil.Amount, error) {
+	time.Duration) (time.Time, error) {
 
-	return time.Now(), nil, 0, nil
+	return time.Now(), nil
 }
 
 // ReleaseOutput currently does nothing.