mutli: move parse upfront shutdown out of rpcserver

lnwallet/chancloser/chancloser.go

@@ -4,6 +4,8 @@ import (
 	"bytes"
 	"fmt"
 
+	"github.com/btcsuite/btcd/chaincfg"
+	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
 	"github.com/btcsuite/btcutil"
 	"github.com/davecgh/go-spew/spew"
@@ -717,3 +719,23 @@ func calcCompromiseFee(chanPoint wire.OutPoint, ourIdealFee, lastSentFee,
 		return remoteFee
 	}
 }
+
+// ParseUpfrontShutdownAddress attempts to parse an upfront shutdown address.
+// If the address is empty, it returns nil. If it successfully decoded the
+// address, it returns a script that pays out to the address.
+func ParseUpfrontShutdownAddress(address string,
+	params *chaincfg.Params) (lnwire.DeliveryAddress, error) {
+
+	if len(address) == 0 {
+		return nil, nil
+	}
+
+	addr, err := btcutil.DecodeAddress(
+		address, params,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("invalid address: %v", err)
+	}
+
+	return txscript.PayToAddrScript(addr)
+}

rpcserver.go

@@ -56,6 +56,7 @@ import (
 	"github.com/lightningnetwork/lnd/lnwallet"
 	"github.com/lightningnetwork/lnd/lnwallet/btcwallet"
 	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
+	"github.com/lightningnetwork/lnd/lnwallet/chancloser"
 	"github.com/lightningnetwork/lnd/lnwallet/chanfunding"
 	"github.com/lightningnetwork/lnd/lnwire"
 	"github.com/lightningnetwork/lnd/macaroons"
@@ -1876,7 +1877,7 @@ func (r *rpcServer) parseOpenChannelReq(in *lnrpc.OpenChannelRequest,
 	rpcsLog.Debugf("[openchannel]: using fee of %v sat/kw for funding tx",
 		int64(feeRate))
 
-	script, err := parseUpfrontShutdownAddress(
+	script, err := chancloser.ParseUpfrontShutdownAddress(
 		in.CloseAddress, r.cfg.ActiveNetParams.Params,
 	)
 	if err != nil {
@@ -2051,26 +2052,6 @@ func (r *rpcServer) OpenChannelSync(ctx context.Context,
 	}
 }
 
-// parseUpfrontShutdownScript attempts to parse an upfront shutdown address.
-// If the address is empty, it returns nil. If it successfully decoded the
-// address, it returns a script that pays out to the address.
-func parseUpfrontShutdownAddress(address string,
-	params *chaincfg.Params) (lnwire.DeliveryAddress, error) {
-
-	if len(address) == 0 {
-		return nil, nil
-	}
-
-	addr, err := btcutil.DecodeAddress(
-		address, params,
-	)
-	if err != nil {
-		return nil, fmt.Errorf("invalid address: %v", err)
-	}
-
-	return txscript.PayToAddrScript(addr)
-}
-
 // GetChanPointFundingTxid returns the given channel point's funding txid in
 // raw bytes.
 func GetChanPointFundingTxid(chanPoint *lnrpc.ChannelPoint) (*chainhash.Hash, error) {