graph/db: simplify auth proof and edge info

diff --git a/autopilot/prefattach_test.go b/autopilot/prefattach_test.go
index 3ab0c4f..78b738d 100644
--- a/autopilot/prefattach_test.go
+++ b/autopilot/prefattach_test.go
@@ -495,7 +495,11 @@ func (d *testDBGraph) addRandChannel(node1, node2 *btcec.PublicKey,
 		Capacity:  capacity,
 		Features:  lnwire.EmptyFeatureVector(),
 	}
-	edge.AddNodeKeys(lnNode1, lnNode2, lnNode1, lnNode2)
+	copy(edge.NodeKey1Bytes[:], lnNode1.SerializeCompressed())
+	copy(edge.NodeKey2Bytes[:], lnNode2.SerializeCompressed())
+	copy(edge.BitcoinKey1Bytes[:], lnNode1.SerializeCompressed())
+	copy(edge.BitcoinKey2Bytes[:], lnNode2.SerializeCompressed())
+
 	if err := d.db.AddChannelEdge(ctx, edge); err != nil {
 		return nil, nil, err
 	}
diff --git a/graph/db/kv_store.go b/graph/db/kv_store.go
index ae4136e..c8e6151 100644
--- a/graph/db/kv_store.go
+++ b/graph/db/kv_store.go
@@ -469,7 +469,7 @@ func forEachChannel(db kvdb.Backend, cb func(*models.ChannelEdgeInfo,
 					chanID:  chanID,
 				}]
 
-				return cb(&info, policy1, policy2)
+				return cb(info, policy1, policy2)
 			},
 		)
 	}, reset)
@@ -557,7 +557,7 @@ func (c *KVStore) ForEachChannelCacheable(cb func(*models.CachedEdgeInfo,
 				}
 
 				return cb(
-					models.NewCachedEdge(&info),
+					models.NewCachedEdge(info),
 					cachedPolicy1, cachedPolicy2,
 				)
 			},
@@ -1393,7 +1393,7 @@ func (c *KVStore) AddEdgeProof(chanID lnwire.ShortChannelID,
 
 		edge.AuthProof = proof
 
-		return putChanEdgeInfo(edgeIndex, &edge, chanKey)
+		return putChanEdgeInfo(edgeIndex, edge, chanKey)
 	}, func() {})
 }
 
@@ -2238,7 +2238,7 @@ func (c *KVStore) fetchNextChanUpdateBatch(
 			// Now we have all the information we need to build the
 			// channel edge.
 			channel := ChannelEdge{
-				Info:    &edgeInfo,
+				Info:    edgeInfo,
 				Policy1: edge1,
 				Policy2: edge2,
 				Node1:   node1,
@@ -2784,7 +2784,7 @@ func (c *KVStore) FilterChannelRange(startHeight,
 				continue
 			}
 
-			node1Key, node2Key := computeEdgePolicyKeys(&edgeInfo)
+			node1Key, node2Key := computeEdgePolicyKeys(edgeInfo)
 
 			rawPolicy := edges.Get(node1Key)
 			if len(rawPolicy) != 0 {
@@ -2936,7 +2936,7 @@ func (c *KVStore) fetchChanInfos(tx kvdb.RTx, chanIDs []uint64) (
 			}
 
 			chanEdges = append(chanEdges, ChannelEdge{
-				Info:    &edgeInfo,
+				Info:    edgeInfo,
 				Policy1: edge1,
 				Policy2: edge2,
 				Node1:   node1,
@@ -3087,7 +3087,7 @@ func (c *KVStore) delChannelEdgeUnsafe(edges, edgeIndex, chanIndex,
 	// being removed due to the channel becoming a zombie. We do this to
 	// ensure we don't store unnecessary data for spent channels.
 	if !isZombie {
-		return &edgeInfo, nil
+		return edgeInfo, nil
 	}
 
 	nodeKey1, nodeKey2 := edgeInfo.NodeKey1Bytes, edgeInfo.NodeKey2Bytes
@@ -3106,7 +3106,7 @@ func (c *KVStore) delChannelEdgeUnsafe(edges, edgeIndex, chanIndex,
 		)
 	}
 
-	return &edgeInfo, markEdgeZombie(
+	return edgeInfo, markEdgeZombie(
 		zombieIndex, byteOrder.Uint64(chanID), nodeKey1, nodeKey2,
 	)
 }
@@ -3551,7 +3551,7 @@ func nodeTraversal(tx kvdb.RTx, nodePub []byte, db kvdb.Backend,
 			}
 
 			// Finally, we execute the callback.
-			err = cb(tx, &edgeInfo, outgoingPolicy, incomingPolicy)
+			err = cb(tx, edgeInfo, outgoingPolicy, incomingPolicy)
 			if err != nil {
 				return err
 			}
@@ -3781,7 +3781,7 @@ func (c *KVStore) FetchChannelEdgesByOutpoint(op *wire.OutPoint) (
 		if err != nil {
 			return fmt.Errorf("%w: chanID=%x", err, chanID)
 		}
-		edgeInfo = &edge
+		edgeInfo = edge
 
 		// Once we have the information about the channels' parameters,
 		// we'll fetch the routing policies for each for the directed
@@ -3887,7 +3887,7 @@ func (c *KVStore) FetchChannelEdgesByID(chanID uint64) (
 			return err
 		}
 
-		edgeInfo = &edge
+		edgeInfo = edge
 
 		// Then we'll attempt to fetch the accompanying policies of this
 		// edge.
@@ -4702,11 +4702,11 @@ func putChanEdgeInfo(edgeIndex kvdb.RwBucket,
 }
 
 func fetchChanEdgeInfo(edgeIndex kvdb.RBucket,
-	chanID []byte) (models.ChannelEdgeInfo, error) {
+	chanID []byte) (*models.ChannelEdgeInfo, error) {
 
 	edgeInfoBytes := edgeIndex.Get(chanID)
 	if edgeInfoBytes == nil {
-		return models.ChannelEdgeInfo{}, ErrEdgeNotFound
+		return nil, ErrEdgeNotFound
 	}
 
 	edgeInfoReader := bytes.NewReader(edgeInfoBytes)
@@ -4714,34 +4714,34 @@ func fetchChanEdgeInfo(edgeIndex kvdb.RBucket,
 	return deserializeChanEdgeInfo(edgeInfoReader)
 }
 
-func deserializeChanEdgeInfo(r io.Reader) (models.ChannelEdgeInfo, error) {
+func deserializeChanEdgeInfo(r io.Reader) (*models.ChannelEdgeInfo, error) {
 	var (
 		err      error
 		edgeInfo models.ChannelEdgeInfo
 	)
 
 	if _, err := io.ReadFull(r, edgeInfo.NodeKey1Bytes[:]); err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 	if _, err := io.ReadFull(r, edgeInfo.NodeKey2Bytes[:]); err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 	if _, err := io.ReadFull(r, edgeInfo.BitcoinKey1Bytes[:]); err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 	if _, err := io.ReadFull(r, edgeInfo.BitcoinKey2Bytes[:]); err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 
 	featureBytes, err := wire.ReadVarBytes(r, 0, 900, "features")
 	if err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 
 	features := lnwire.NewRawFeatureVector()
 	err = features.Decode(bytes.NewReader(featureBytes))
 	if err != nil {
-		return models.ChannelEdgeInfo{}, fmt.Errorf("unable to decode "+
+		return nil, fmt.Errorf("unable to decode "+
 			"features: %w", err)
 	}
 	edgeInfo.Features = lnwire.NewFeatureVector(features, lnwire.Features)
@@ -4750,19 +4750,19 @@ func deserializeChanEdgeInfo(r io.Reader) (models.ChannelEdgeInfo, error) {
 
 	proof.NodeSig1Bytes, err = wire.ReadVarBytes(r, 0, 80, "sigs")
 	if err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 	proof.NodeSig2Bytes, err = wire.ReadVarBytes(r, 0, 80, "sigs")
 	if err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 	proof.BitcoinSig1Bytes, err = wire.ReadVarBytes(r, 0, 80, "sigs")
 	if err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 	proof.BitcoinSig2Bytes, err = wire.ReadVarBytes(r, 0, 80, "sigs")
 	if err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 
 	if !proof.IsEmpty() {
@@ -4771,17 +4771,17 @@ func deserializeChanEdgeInfo(r io.Reader) (models.ChannelEdgeInfo, error) {
 
 	edgeInfo.ChannelPoint = wire.OutPoint{}
 	if err := ReadOutpoint(r, &edgeInfo.ChannelPoint); err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 	if err := binary.Read(r, byteOrder, &edgeInfo.Capacity); err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 	if err := binary.Read(r, byteOrder, &edgeInfo.ChannelID); err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 
 	if _, err := io.ReadFull(r, edgeInfo.ChainHash[:]); err != nil {
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 
 	// We'll try and see if there are any opaque bytes left, if not, then
@@ -4793,10 +4793,10 @@ func deserializeChanEdgeInfo(r io.Reader) (models.ChannelEdgeInfo, error) {
 	case errors.Is(err, io.ErrUnexpectedEOF):
 	case errors.Is(err, io.EOF):
 	case err != nil:
-		return models.ChannelEdgeInfo{}, err
+		return nil, err
 	}
 
-	return edgeInfo, nil
+	return &edgeInfo, nil
 }
 
 func putChanEdgePolicy(edges kvdb.RwBucket, edge *models.ChannelEdgePolicy,
diff --git a/graph/db/models/channel_auth_proof.go b/graph/db/models/channel_auth_proof.go
index 1341394..daf120b 100644
--- a/graph/db/models/channel_auth_proof.go
+++ b/graph/db/models/channel_auth_proof.go
@@ -1,7 +1,5 @@
 package models
 
-import "github.com/btcsuite/btcd/btcec/v2/ecdsa"
-
 // ChannelAuthProof is the authentication proof (the signature portion) for a
 // channel. Using the four signatures contained in the struct, and some
 // auxiliary knowledge (the funding script, node identities, and outpoint) nodes
@@ -10,117 +8,23 @@ import "github.com/btcsuite/btcd/btcec/v2/ecdsa"
 // nodeID1 || nodeID2 || bitcoinKey1|| bitcoinKey2 || 2-byte-feature-len ||
 // features.
 type ChannelAuthProof struct {
-	// nodeSig1 is a cached instance of the first node signature.
-	nodeSig1 *ecdsa.Signature
-
 	// NodeSig1Bytes are the raw bytes of the first node signature encoded
 	// in DER format.
 	NodeSig1Bytes []byte
 
-	// nodeSig2 is a cached instance of the second node signature.
-	nodeSig2 *ecdsa.Signature
-
 	// NodeSig2Bytes are the raw bytes of the second node signature
 	// encoded in DER format.
 	NodeSig2Bytes []byte
 
-	// bitcoinSig1 is a cached instance of the first bitcoin signature.
-	bitcoinSig1 *ecdsa.Signature
-
 	// BitcoinSig1Bytes are the raw bytes of the first bitcoin signature
 	// encoded in DER format.
 	BitcoinSig1Bytes []byte
 
-	// bitcoinSig2 is a cached instance of the second bitcoin signature.
-	bitcoinSig2 *ecdsa.Signature
-
 	// BitcoinSig2Bytes are the raw bytes of the second bitcoin signature
 	// encoded in DER format.
 	BitcoinSig2Bytes []byte
 }
 
-// Node1Sig is the signature using the identity key of the node that is first
-// in a lexicographical ordering of the serialized public keys of the two nodes
-// that created the channel.
-//
-// NOTE: By having this method to access an attribute, we ensure we only need
-// to fully deserialize the signature if absolutely necessary.
-func (c *ChannelAuthProof) Node1Sig() (*ecdsa.Signature, error) {
-	if c.nodeSig1 != nil {
-		return c.nodeSig1, nil
-	}
-
-	sig, err := ecdsa.ParseSignature(c.NodeSig1Bytes)
-	if err != nil {
-		return nil, err
-	}
-
-	c.nodeSig1 = sig
-
-	return sig, nil
-}
-
-// Node2Sig is the signature using the identity key of the node that is second
-// in a lexicographical ordering of the serialized public keys of the two nodes
-// that created the channel.
-//
-// NOTE: By having this method to access an attribute, we ensure we only need
-// to fully deserialize the signature if absolutely necessary.
-func (c *ChannelAuthProof) Node2Sig() (*ecdsa.Signature, error) {
-	if c.nodeSig2 != nil {
-		return c.nodeSig2, nil
-	}
-
-	sig, err := ecdsa.ParseSignature(c.NodeSig2Bytes)
-	if err != nil {
-		return nil, err
-	}
-
-	c.nodeSig2 = sig
-
-	return sig, nil
-}
-
-// BitcoinSig1 is the signature using the public key of the first node that was
-// used in the channel's multi-sig output.
-//
-// NOTE: By having this method to access an attribute, we ensure we only need
-// to fully deserialize the signature if absolutely necessary.
-func (c *ChannelAuthProof) BitcoinSig1() (*ecdsa.Signature, error) {
-	if c.bitcoinSig1 != nil {
-		return c.bitcoinSig1, nil
-	}
-
-	sig, err := ecdsa.ParseSignature(c.BitcoinSig1Bytes)
-	if err != nil {
-		return nil, err
-	}
-
-	c.bitcoinSig1 = sig
-
-	return sig, nil
-}
-
-// BitcoinSig2 is the signature using the public key of the second node that
-// was used in the channel's multi-sig output.
-//
-// NOTE: By having this method to access an attribute, we ensure we only need
-// to fully deserialize the signature if absolutely necessary.
-func (c *ChannelAuthProof) BitcoinSig2() (*ecdsa.Signature, error) {
-	if c.bitcoinSig2 != nil {
-		return c.bitcoinSig2, nil
-	}
-
-	sig, err := ecdsa.ParseSignature(c.BitcoinSig2Bytes)
-	if err != nil {
-		return nil, err
-	}
-
-	c.bitcoinSig2 = sig
-
-	return sig, nil
-}
-
 // IsEmpty check is the authentication proof is empty Proof is empty if at
 // least one of the signatures are equal to nil.
 func (c *ChannelAuthProof) IsEmpty() bool {
diff --git a/graph/db/models/channel_edge_info.go b/graph/db/models/channel_edge_info.go
index d192875..b86c140 100644
--- a/graph/db/models/channel_edge_info.go
+++ b/graph/db/models/channel_edge_info.go
@@ -26,9 +26,6 @@ type ChannelEdgeInfo struct {
 
 	// ChainHash is the hash that uniquely identifies the chain that this
 	// channel was opened within.
-	//
-	// TODO(roasbeef): need to modify db keying for multi-chain
-	//  * must add chain hash to prefix as well
 	ChainHash chainhash.Hash
 
 	// NodeKey1Bytes is the raw public key of the first node.
@@ -41,11 +38,9 @@ type ChannelEdgeInfo struct {
 
 	// BitcoinKey1Bytes is the raw public key of the first node.
 	BitcoinKey1Bytes [33]byte
-	bitcoinKey1      *btcec.PublicKey
 
 	// BitcoinKey2Bytes is the raw public key of the first node.
 	BitcoinKey2Bytes [33]byte
-	bitcoinKey2      *btcec.PublicKey
 
 	// Features is the list of protocol features supported by this channel
 	// edge.
@@ -79,24 +74,6 @@ type ChannelEdgeInfo struct {
 	ExtraOpaqueData []byte
 }
 
-// AddNodeKeys is a setter-like method that can be used to replace the set of
-// keys for the target ChannelEdgeInfo.
-func (c *ChannelEdgeInfo) AddNodeKeys(nodeKey1, nodeKey2, bitcoinKey1,
-	bitcoinKey2 *btcec.PublicKey) {
-
-	c.nodeKey1 = nodeKey1
-	copy(c.NodeKey1Bytes[:], c.nodeKey1.SerializeCompressed())
-
-	c.nodeKey2 = nodeKey2
-	copy(c.NodeKey2Bytes[:], nodeKey2.SerializeCompressed())
-
-	c.bitcoinKey1 = bitcoinKey1
-	copy(c.BitcoinKey1Bytes[:], c.bitcoinKey1.SerializeCompressed())
-
-	c.bitcoinKey2 = bitcoinKey2
-	copy(c.BitcoinKey2Bytes[:], bitcoinKey2.SerializeCompressed())
-}
-
 // NodeKey1 is the identity public key of the "first" node that was involved in
 // the creation of this channel. A node is considered "first" if the
 // lexicographical ordering the its serialized public key is "smaller" than
@@ -139,46 +116,6 @@ func (c *ChannelEdgeInfo) NodeKey2() (*btcec.PublicKey, error) {
 	return key, nil
 }
 
-// BitcoinKey1 is the Bitcoin multi-sig key belonging to the first node, that
-// was involved in the funding transaction that originally created the channel
-// that this struct represents.
-//
-// NOTE: By having this method to access an attribute, we ensure we only need
-// to fully deserialize the pubkey if absolutely necessary.
-func (c *ChannelEdgeInfo) BitcoinKey1() (*btcec.PublicKey, error) {
-	if c.bitcoinKey1 != nil {
-		return c.bitcoinKey1, nil
-	}
-
-	key, err := btcec.ParsePubKey(c.BitcoinKey1Bytes[:])
-	if err != nil {
-		return nil, err
-	}
-	c.bitcoinKey1 = key
-
-	return key, nil
-}
-
-// BitcoinKey2 is the Bitcoin multi-sig key belonging to the second node, that
-// was involved in the funding transaction that originally created the channel
-// that this struct represents.
-//
-// NOTE: By having this method to access an attribute, we ensure we only need
-// to fully deserialize the pubkey if absolutely necessary.
-func (c *ChannelEdgeInfo) BitcoinKey2() (*btcec.PublicKey, error) {
-	if c.bitcoinKey2 != nil {
-		return c.bitcoinKey2, nil
-	}
-
-	key, err := btcec.ParsePubKey(c.BitcoinKey2Bytes[:])
-	if err != nil {
-		return nil, err
-	}
-	c.bitcoinKey2 = key
-
-	return key, nil
-}
-
 // OtherNodeKeyBytes returns the node key bytes of the other end of the channel.
 func (c *ChannelEdgeInfo) OtherNodeKeyBytes(thisNodeKey []byte) (
 	[33]byte, error) {