diff --git a/sidecar/codec_test.go b/sidecar/codec_test.go
index fc27076..5074976 100644
--- a/sidecar/codec_test.go
+++ b/sidecar/codec_test.go
@@ -9,15 +9,15 @@ import (
 )
 
 var (
-	hardcodedTicket = "sidecarAAQgHBgUEAwIBAAIBYwMBAgp5CwgAAAAAAAADCQwIAA" +
-		"AAAAAAA3gNIQLVLm5gAB7Vh7eEvz8Y3CkF2DsvNuSWJj8oOxp1iSh5xw5AAA" +
-		"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACwAAAAAAAAAAAAAAAAAAA" +
-		"AAAAAAAAAAAAAAAAAAAAAAFhRGFSEC1S5uYAAe1Ye3hL8_GNwpBdg7Lzbkli" +
-		"Y_KDsadYkoeccWIQMZ1hb2o3OyT-XUX7KWS-pAVBloIPQe8aCTqcjiNOV89x" +
-		"5kHyALFiEsAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACBAAAAAAAAAAA" +
-		"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGMAAAAAAAAAAAAAAAAAAAAAAAAAAA" +
-		"AAAAAAAAAAAAAAISgiKSBjWE0AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" +
-		"AAAA3VE-c="
+	hardcodedTicket = "sidecarAAQgHBgUEAwIBAAIBYwMBAgp_CwgAAAAAAAADCQwIAA" +
+		"AAAAAAA3gNBAAAB-AOIQLVLm5gAB7Vh7eEvz8Y3CkF2DsvNuSWJj8oOxp1iS" +
+		"h5xw9AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACwAAAAAAAAAAA" +
+		"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFhRMFSEC1S5uYAAe1Ye3hL8_GNwpBd" +
+		"g7LzbkliY_KDsadYkoeccWIQMZ1hb2o3OyT-XUX7KWS-pAVBloIPQe8aCTqc" +
+		"jiNOV89xcEAAAAAB5kHyALFiEsAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" +
+		"AAACBAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGMAAAAAAAAAAA" +
+		"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAISgiKSBjWE0AAAAAAAAAAAAAAAAAAA" +
+		"AAAAAAAAAAAAAAAAAAAHcU6Y4="
 )
 
 // TestEncodeDecode tests that a ticket can be encoded and decoded from/to a
@@ -29,9 +29,10 @@ func TestEncodeDecode(t *testing.T) {
 		Version: Version(99),
 		State:   StateRegistered,
 		Offer: Offer{
-			Capacity:   777,
-			PushAmt:    888,
-			SignPubKey: testPubKey,
+			Capacity:            777,
+			PushAmt:             888,
+			LeaseDurationBlocks: 2016,
+			SignPubKey:          testPubKey,
 			SigOfferDigest: &btcec.Signature{
 				R: new(big.Int).SetInt64(44),
 				S: new(big.Int).SetInt64(22),
diff --git a/sidecar/interface.go b/sidecar/interface.go
index 9e49ad6..e0a7f85 100644
--- a/sidecar/interface.go
+++ b/sidecar/interface.go
@@ -102,6 +102,10 @@ type Offer struct {
 	// reduce the matching chances somewhat.
 	PushAmt btcutil.Amount
 
+	// LeaseDurationBlocks is the number of blocks the offered channel in
+	// this offer would be leased for.
+	LeaseDurationBlocks uint32
+
 	// SignPubKey is the public key for corresponding to the private key
 	// that signed the SigOfferDigest below and, in a later state, the
 	// SigOrderDigest of the Order struct.
@@ -124,6 +128,9 @@ type Recipient struct {
 	// multisig keys of the channel funding transaction output and is
 	// advertised in the bid order.
 	MultiSigPubKey *btcec.PublicKey
+
+	// MultiSigKeyIndex is the derivation index of the MultiSigPubKey.
+	MultiSigKeyIndex uint32
 }
 
 // Order is a struct holding the information about the sidecar bid order after
@@ -189,15 +196,16 @@ type Ticket struct {
 // NewTicket creates a new sidecar ticket with the given version and offer
 // information.
 func NewTicket(version Version, capacity, pushAmt btcutil.Amount,
-	offerPubKey *btcec.PublicKey) (*Ticket, error) {
+	duration uint32, offerPubKey *btcec.PublicKey) (*Ticket, error) {
 
 	t := &Ticket{
 		Version: version,
 		State:   StateOffered,
 		Offer: Offer{
-			Capacity:   capacity,
-			PushAmt:    pushAmt,
-			SignPubKey: offerPubKey,
+			Capacity:            capacity,
+			PushAmt:             pushAmt,
+			LeaseDurationBlocks: duration,
+			SignPubKey:          offerPubKey,
 		},
 	}
 
diff --git a/sidecar/tlv.go b/sidecar/tlv.go
index 21304ea..2724e79 100644
--- a/sidecar/tlv.go
+++ b/sidecar/tlv.go
@@ -19,12 +19,14 @@ const (
 	offerType          tlv.Type = 10
 	capacityType       tlv.Type = 11
 	pushAmtType        tlv.Type = 12
-	signPubKeyType     tlv.Type = 13
-	sigOfferDigestType tlv.Type = 14
+	leaseDurationType  tlv.Type = 13
+	signPubKeyType     tlv.Type = 14
+	sigOfferDigestType tlv.Type = 15
 
-	recipientType      tlv.Type = 20
-	nodePubKeyType     tlv.Type = 21
-	multiSigPubKeyType tlv.Type = 22
+	recipientType        tlv.Type = 20
+	nodePubKeyType       tlv.Type = 21
+	multiSigPubKeyType   tlv.Type = 22
+	multiSigKeyIndexType tlv.Type = 23
 
 	orderType          tlv.Type = 30
 	bidNonceType       tlv.Type = 31
@@ -177,6 +179,9 @@ func serializeOffer(o Offer) ([]byte, error) {
 	tlvRecords := []tlv.Record{
 		tlv.MakePrimitiveRecord(capacityType, &capacity),
 		tlv.MakePrimitiveRecord(pushAmtType, &pushAmt),
+		tlv.MakePrimitiveRecord(
+			leaseDurationType, &o.LeaseDurationBlocks,
+		),
 	}
 
 	if o.SignPubKey != nil {
@@ -206,6 +211,9 @@ func deserializeOffer(offerBytes []byte) (Offer, error) {
 		offerBytes,
 		tlv.MakePrimitiveRecord(capacityType, &capacity),
 		tlv.MakePrimitiveRecord(pushAmtType, &pushAmt),
+		tlv.MakePrimitiveRecord(
+			leaseDurationType, &o.LeaseDurationBlocks,
+		),
 		tlv.MakePrimitiveRecord(signPubKeyType, &o.SignPubKey),
 		tlv.MakeStaticRecord(
 			sigOfferDigestType, &o.SigOfferDigest, 64, ESig, DSig,
@@ -236,6 +244,10 @@ func serializeRecipient(r Recipient) ([]byte, error) {
 		))
 	}
 
+	tlvRecords = append(tlvRecords, tlv.MakePrimitiveRecord(
+		multiSigKeyIndexType, &r.MultiSigKeyIndex,
+	))
+
 	return encodeBytes(tlvRecords...)
 }
 
@@ -247,6 +259,9 @@ func deserializeRecipient(recipientBytes []byte) (Recipient, error) {
 		recipientBytes,
 		tlv.MakePrimitiveRecord(nodePubKeyType, &r.NodePubKey),
 		tlv.MakePrimitiveRecord(multiSigPubKeyType, &r.MultiSigPubKey),
+		tlv.MakePrimitiveRecord(
+			multiSigKeyIndexType, &r.MultiSigKeyIndex,
+		),
 	)
 }