chanstate: move channel snapshot type

diff --git a/channeldb/channel.go b/channeldb/channel.go
index 7ce0078..eae8f2f 100644
--- a/channeldb/channel.go
+++ b/channeldb/channel.go
@@ -4013,40 +4013,8 @@ func (c *ChannelStateDB) closeChannelTombstone(channel *OpenChannel,
 	}, func() {})
 }
 
-// ChannelSnapshot is a frozen snapshot of the current channel state. A
-// snapshot is detached from the original channel that generated it, providing
-// read-only access to the current or prior state of an active channel.
-//
-// TODO(roasbeef): remove all together? pretty much just commitment
-type ChannelSnapshot struct {
-	// RemoteIdentity is the identity public key of the remote node that we
-	// are maintaining the open channel with.
-	RemoteIdentity btcec.PublicKey
-
-	// ChanPoint is the outpoint that created the channel. This output is
-	// found within the funding transaction and uniquely identified the
-	// channel on the resident chain.
-	ChannelPoint wire.OutPoint
-
-	// ChainHash is the genesis hash of the chain that the channel resides
-	// within.
-	ChainHash chainhash.Hash
-
-	// Capacity is the total capacity of the channel.
-	Capacity btcutil.Amount
-
-	// TotalMSatSent is the total number of milli-satoshis we've sent
-	// within this channel.
-	TotalMSatSent lnwire.MilliSatoshi
-
-	// TotalMSatReceived is the total number of milli-satoshis we've
-	// received within this channel.
-	TotalMSatReceived lnwire.MilliSatoshi
-
-	// ChannelCommitment is the current up-to-date commitment for the
-	// target channel.
-	ChannelCommitment
-}
+// ChannelSnapshot is a frozen snapshot of the current channel state.
+type ChannelSnapshot = cstate.ChannelSnapshot
 
 // Snapshot returns a read-only snapshot of the current channel state. This
 // snapshot includes information concerning the current settled balance within
diff --git a/chanstate/snapshot.go b/chanstate/snapshot.go
new file mode 100644
index 0000000..2bae2ed
--- /dev/null
+++ b/chanstate/snapshot.go
@@ -0,0 +1,44 @@
+package chanstate
+
+import (
+	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/btcsuite/btcd/btcutil/v2"
+	"github.com/btcsuite/btcd/chainhash/v2"
+	"github.com/btcsuite/btcd/wire/v2"
+	"github.com/lightningnetwork/lnd/lnwire"
+)
+
+// ChannelSnapshot is a frozen snapshot of the current channel state. A
+// snapshot is detached from the original channel that generated it, providing
+// read-only access to the current or prior state of an active channel.
+//
+// TODO(roasbeef): remove all together? pretty much just commitment.
+type ChannelSnapshot struct {
+	// RemoteIdentity is the identity public key of the remote node that we
+	// are maintaining the open channel with.
+	RemoteIdentity btcec.PublicKey
+
+	// ChanPoint is the outpoint that created the channel. This output is
+	// found within the funding transaction and uniquely identified the
+	// channel on the resident chain.
+	ChannelPoint wire.OutPoint
+
+	// ChainHash is the genesis hash of the chain that the channel resides
+	// within.
+	ChainHash chainhash.Hash
+
+	// Capacity is the total capacity of the channel.
+	Capacity btcutil.Amount
+
+	// TotalMSatSent is the total number of milli-satoshis we've sent
+	// within this channel.
+	TotalMSatSent lnwire.MilliSatoshi
+
+	// TotalMSatReceived is the total number of milli-satoshis we've
+	// received within this channel.
+	TotalMSatReceived lnwire.MilliSatoshi
+
+	// ChannelCommitment is the current up-to-date commitment for the
+	// target channel.
+	ChannelCommitment
+}