server+peer: init peer struct w/ AuxChanCloser if present

config_builder.go

@@ -42,6 +42,7 @@ import (
 	"github.com/lightningnetwork/lnd/lnrpc"
 	"github.com/lightningnetwork/lnd/lnwallet"
 	"github.com/lightningnetwork/lnd/lnwallet/btcwallet"
+	"github.com/lightningnetwork/lnd/lnwallet/chancloser"
 	"github.com/lightningnetwork/lnd/lnwallet/rpcwallet"
 	"github.com/lightningnetwork/lnd/macaroons"
 	"github.com/lightningnetwork/lnd/msgmux"
@@ -182,6 +183,10 @@ type AuxComponents struct {
 	// AuxDataParser is an optional data parser that can be used to parse
 	// auxiliary data for certain custom channel types.
 	AuxDataParser fn.Option[AuxDataParser]
+
+	// AuxChanCloser is an optional channel closer that can be used to
+	// modify the way a coop-close transaction is constructed.
+	AuxChanCloser fn.Option[chancloser.AuxChanCloser]
 }
 
 // DefaultWalletImpl is the default implementation of our normal, btcwallet

peer/brontide.go

@@ -400,6 +400,10 @@ type Config struct {
 	// in place.
 	MsgRouter fn.Option[msgmux.Router]
 
+	// AuxChanCloser is an optional instance of an abstraction that can be
+	// used to modify the way the co-op close transaction is constructed.
+	AuxChanCloser fn.Option[chancloser.AuxChanCloser]
+
 	// Quit is the server's quit channel. If this is closed, we halt operation.
 	Quit chan struct{}
 }

server.go

@@ -4075,6 +4075,7 @@ func (s *server) peerConnected(conn net.Conn, connReq *connmgr.ConnReq,
 		AuxLeafStore:           s.implCfg.AuxLeafStore,
 		AuxSigner:              s.implCfg.AuxSigner,
 		MsgRouter:              s.implCfg.MsgRouter,
+		AuxChanCloser:          s.implCfg.AuxChanCloser,
 	}
 
 	copy(pCfg.PubKeyBytes[:], peerAddr.IdentityKey.SerializeCompressed())