diff --git a/api-spec/openapi/swagger/ark/v1/service.swagger.json b/api-spec/openapi/swagger/ark/v1/service.swagger.json
index 3754e1c..3141115 100644
--- a/api-spec/openapi/swagger/ark/v1/service.swagger.json
+++ b/api-spec/openapi/swagger/ark/v1/service.swagger.json
@@ -651,6 +651,9 @@
         },
         "descriptor": {
           "type": "string"
+        },
+        "tapscripts": {
+          "$ref": "#/definitions/v1Tapscripts"
         }
       }
     },
@@ -748,6 +751,9 @@
         },
         "descriptor": {
           "type": "string"
+        },
+        "tapscripts": {
+          "$ref": "#/definitions/v1Tapscripts"
         }
       }
     },
@@ -824,7 +830,7 @@
           "title": "VTXO outpoint signed with script's secret key"
         }
       },
-      "description": "This message is used to prove to the ASP that the user controls the vtxo without revealing the whole VTXO descriptor."
+      "description": "This message is used to prove to the ASP that the user controls the vtxo without revealing the whole VTXO taproot tree."
     },
     "v1PingResponse": {
       "type": "object"
@@ -1137,6 +1143,17 @@
     "v1SubmitTreeSignaturesResponse": {
       "type": "object"
     },
+    "v1Tapscripts": {
+      "type": "object",
+      "properties": {
+        "scripts": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
+        }
+      }
+    },
     "v1Tree": {
       "type": "object",
       "properties": {
diff --git a/api-spec/protobuf/ark/v1/service.proto b/api-spec/protobuf/ark/v1/service.proto
index 9143513..84f6446 100755
--- a/api-spec/protobuf/ark/v1/service.proto
+++ b/api-spec/protobuf/ark/v1/service.proto
@@ -133,7 +133,10 @@ message GetBoardingAddressRequest {
 }
 message GetBoardingAddressResponse {
   string address = 1;
-  string descriptor = 2;
+  oneof taproot_tree {
+    string descriptor = 2;
+    Tapscripts tapscripts = 3;
+  }
 }
 
 /* In-Round Payment API messages */
@@ -298,7 +301,10 @@ message Outpoint {
 
 message Input {
   Outpoint outpoint = 1;
-  string descriptor = 2;
+  oneof taproot_tree {
+    string descriptor = 2;
+    Tapscripts tapscripts = 3;
+  }
 }
 
 message Output {
@@ -355,7 +361,7 @@ message RedeemTransaction {
   repeated Vtxo spendable_vtxos = 3;
 }
 
-// This message is used to prove to the ASP that the user controls the vtxo without revealing the whole VTXO descriptor.
+// This message is used to prove to the ASP that the user controls the vtxo without revealing the whole VTXO taproot tree.
 message OwnershipProof {
   string control_block = 1;
   string script = 2;
@@ -378,4 +384,8 @@ message DeleteNostrRecipientRequest {
   repeated SignedVtxoOutpoint vtxos = 1;
 }
 
-message DeleteNostrRecipientResponse {}
\ No newline at end of file
+message DeleteNostrRecipientResponse {}
+
+message Tapscripts {
+  repeated string scripts = 1;
+}
\ No newline at end of file
diff --git a/api-spec/protobuf/gen/ark/v1/service.pb.go b/api-spec/protobuf/gen/ark/v1/service.pb.go
index 20481c5..a6e96e6 100644
--- a/api-spec/protobuf/gen/ark/v1/service.pb.go
+++ b/api-spec/protobuf/gen/ark/v1/service.pb.go
@@ -277,8 +277,12 @@ type GetBoardingAddressResponse struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Address     string `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
-	Descriptor_ string `protobuf:"bytes,2,opt,name=descriptor,proto3" json:"descriptor,omitempty"`
+	Address string `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
+	// Types that are assignable to TaprootTree:
+	//
+	//	*GetBoardingAddressResponse_Descriptor_
+	//	*GetBoardingAddressResponse_Tapscripts
+	TaprootTree isGetBoardingAddressResponse_TaprootTree `protobuf_oneof:"taproot_tree"`
 }
 
 func (x *GetBoardingAddressResponse) Reset() {
@@ -320,13 +324,43 @@ func (x *GetBoardingAddressResponse) GetAddress() string {
 	return ""
 }
 
+func (m *GetBoardingAddressResponse) GetTaprootTree() isGetBoardingAddressResponse_TaprootTree {
+	if m != nil {
+		return m.TaprootTree
+	}
+	return nil
+}
+
 func (x *GetBoardingAddressResponse) GetDescriptor_() string {
-	if x != nil {
+	if x, ok := x.GetTaprootTree().(*GetBoardingAddressResponse_Descriptor_); ok {
 		return x.Descriptor_
 	}
 	return ""
 }
 
+func (x *GetBoardingAddressResponse) GetTapscripts() *Tapscripts {
+	if x, ok := x.GetTaprootTree().(*GetBoardingAddressResponse_Tapscripts); ok {
+		return x.Tapscripts
+	}
+	return nil
+}
+
+type isGetBoardingAddressResponse_TaprootTree interface {
+	isGetBoardingAddressResponse_TaprootTree()
+}
+
+type GetBoardingAddressResponse_Descriptor_ struct {
+	Descriptor_ string `protobuf:"bytes,2,opt,name=descriptor,proto3,oneof"`
+}
+
+type GetBoardingAddressResponse_Tapscripts struct {
+	Tapscripts *Tapscripts `protobuf:"bytes,3,opt,name=tapscripts,proto3,oneof"`
+}
+
+func (*GetBoardingAddressResponse_Descriptor_) isGetBoardingAddressResponse_TaprootTree() {}
+
+func (*GetBoardingAddressResponse_Tapscripts) isGetBoardingAddressResponse_TaprootTree() {}
+
 type RegisterInputsForNextRoundRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -2086,8 +2120,12 @@ type Input struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Outpoint    *Outpoint `protobuf:"bytes,1,opt,name=outpoint,proto3" json:"outpoint,omitempty"`
-	Descriptor_ string    `protobuf:"bytes,2,opt,name=descriptor,proto3" json:"descriptor,omitempty"`
+	Outpoint *Outpoint `protobuf:"bytes,1,opt,name=outpoint,proto3" json:"outpoint,omitempty"`
+	// Types that are assignable to TaprootTree:
+	//
+	//	*Input_Descriptor_
+	//	*Input_Tapscripts
+	TaprootTree isInput_TaprootTree `protobuf_oneof:"taproot_tree"`
 }
 
 func (x *Input) Reset() {
@@ -2129,13 +2167,43 @@ func (x *Input) GetOutpoint() *Outpoint {
 	return nil
 }
 
+func (m *Input) GetTaprootTree() isInput_TaprootTree {
+	if m != nil {
+		return m.TaprootTree
+	}
+	return nil
+}
+
 func (x *Input) GetDescriptor_() string {
-	if x != nil {
+	if x, ok := x.GetTaprootTree().(*Input_Descriptor_); ok {
 		return x.Descriptor_
 	}
 	return ""
 }
 
+func (x *Input) GetTapscripts() *Tapscripts {
+	if x, ok := x.GetTaprootTree().(*Input_Tapscripts); ok {
+		return x.Tapscripts
+	}
+	return nil
+}
+
+type isInput_TaprootTree interface {
+	isInput_TaprootTree()
+}
+
+type Input_Descriptor_ struct {
+	Descriptor_ string `protobuf:"bytes,2,opt,name=descriptor,proto3,oneof"`
+}
+
+type Input_Tapscripts struct {
+	Tapscripts *Tapscripts `protobuf:"bytes,3,opt,name=tapscripts,proto3,oneof"`
+}
+
+func (*Input_Descriptor_) isInput_TaprootTree() {}
+
+func (*Input_Tapscripts) isInput_TaprootTree() {}
+
 type Output struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -2728,7 +2796,7 @@ func (x *RedeemTransaction) GetSpendableVtxos() []*Vtxo {
 	return nil
 }
 
-// This message is used to prove to the ASP that the user controls the vtxo without revealing the whole VTXO descriptor.
+// This message is used to prove to the ASP that the user controls the vtxo without revealing the whole VTXO taproot tree.
 type OwnershipProof struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -3025,6 +3093,53 @@ func (*DeleteNostrRecipientResponse) Descriptor() ([]byte, []int) {
 	return file_ark_v1_service_proto_rawDescGZIP(), []int{51}
 }
 
+type Tapscripts struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Scripts []string `protobuf:"bytes,1,rep,name=scripts,proto3" json:"scripts,omitempty"`
+}
+
+func (x *Tapscripts) Reset() {
+	*x = Tapscripts{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_ark_v1_service_proto_msgTypes[52]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Tapscripts) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Tapscripts) ProtoMessage() {}
+
+func (x *Tapscripts) ProtoReflect() protoreflect.Message {
+	mi := &file_ark_v1_service_proto_msgTypes[52]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Tapscripts.ProtoReflect.Descriptor instead.
+func (*Tapscripts) Descriptor() ([]byte, []int) {
+	return file_ark_v1_service_proto_rawDescGZIP(), []int{52}
+}
+
+func (x *Tapscripts) GetScripts() []string {
+	if x != nil {
+		return x.Scripts
+	}
+	return nil
+}
+
 var File_ark_v1_service_proto protoreflect.FileDescriptor
 
 var file_ark_v1_service_proto_rawDesc = []byte{
@@ -3060,448 +3175,460 @@ var file_ark_v1_service_proto_rawDesc = []byte{
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 }
 
 var (
@@ -3517,7 +3644,7 @@ func file_ark_v1_service_proto_rawDescGZIP() []byte {
 }
 
 var file_ark_v1_service_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_ark_v1_service_proto_msgTypes = make([]protoimpl.MessageInfo, 52)
+var file_ark_v1_service_proto_msgTypes = make([]protoimpl.MessageInfo, 53)
 var file_ark_v1_service_proto_goTypes = []interface{}{
 	(RoundStage)(0),                             // 0: ark.v1.RoundStage
 	(*GetInfoRequest)(nil),                      // 1: ark.v1.GetInfoRequest
@@ -3572,80 +3699,83 @@ var file_ark_v1_service_proto_goTypes = []interface{}{
 	(*SetNostrRecipientResponse)(nil),           // 50: ark.v1.SetNostrRecipientResponse
 	(*DeleteNostrRecipientRequest)(nil),         // 51: ark.v1.DeleteNostrRecipientRequest
 	(*DeleteNostrRecipientResponse)(nil),        // 52: ark.v1.DeleteNostrRecipientResponse
+	(*Tapscripts)(nil),                          // 53: ark.v1.Tapscripts
 }
 var file_ark_v1_service_proto_depIdxs = []int32{
-	37, // 0: ark.v1.RegisterInputsForNextRoundRequest.inputs:type_name -> ark.v1.Input
-	38, // 1: ark.v1.RegisterOutputsForNextRoundRequest.outputs:type_name -> ark.v1.Output
-	30, // 2: ark.v1.GetEventStreamResponse.round_finalization:type_name -> ark.v1.RoundFinalizationEvent
-	31, // 3: ark.v1.GetEventStreamResponse.round_finalized:type_name -> ark.v1.RoundFinalizedEvent
-	32, // 4: ark.v1.GetEventStreamResponse.round_failed:type_name -> ark.v1.RoundFailed
-	33, // 5: ark.v1.GetEventStreamResponse.round_signing:type_name -> ark.v1.RoundSigningEvent
-	34, // 6: ark.v1.GetEventStreamResponse.round_signing_nonces_generated:type_name -> ark.v1.RoundSigningNoncesGeneratedEvent
-	37, // 7: ark.v1.AsyncPaymentInput.input:type_name -> ark.v1.Input
-	19, // 8: ark.v1.CreatePaymentRequest.inputs:type_name -> ark.v1.AsyncPaymentInput
-	38, // 9: ark.v1.CreatePaymentRequest.outputs:type_name -> ark.v1.Output
-	35, // 10: ark.v1.GetRoundResponse.round:type_name -> ark.v1.Round
-	35, // 11: ark.v1.GetRoundByIdResponse.round:type_name -> ark.v1.Round
-	42, // 12: ark.v1.ListVtxosResponse.spendable_vtxos:type_name -> ark.v1.Vtxo
-	42, // 13: ark.v1.ListVtxosResponse.spent_vtxos:type_name -> ark.v1.Vtxo
-	39, // 14: ark.v1.RoundFinalizationEvent.vtxo_tree:type_name -> ark.v1.Tree
-	39, // 15: ark.v1.RoundSigningEvent.unsigned_vtxo_tree:type_name -> ark.v1.Tree
-	39, // 16: ark.v1.Round.vtxo_tree:type_name -> ark.v1.Tree
-	0,  // 17: ark.v1.Round.stage:type_name -> ark.v1.RoundStage
-	36, // 18: ark.v1.Input.outpoint:type_name -> ark.v1.Outpoint
-	40, // 19: ark.v1.Tree.levels:type_name -> ark.v1.TreeLevel
-	41, // 20: ark.v1.TreeLevel.nodes:type_name -> ark.v1.Node
-	36, // 21: ark.v1.Vtxo.outpoint:type_name -> ark.v1.Outpoint
-	45, // 22: ark.v1.GetTransactionsStreamResponse.round:type_name -> ark.v1.RoundTransaction
-	46, // 23: ark.v1.GetTransactionsStreamResponse.redeem:type_name -> ark.v1.RedeemTransaction
-	36, // 24: ark.v1.RoundTransaction.spent_vtxos:type_name -> ark.v1.Outpoint
-	42, // 25: ark.v1.RoundTransaction.spendable_vtxos:type_name -> ark.v1.Vtxo
-	36, // 26: ark.v1.RoundTransaction.claimed_boarding_utxos:type_name -> ark.v1.Outpoint
-	36, // 27: ark.v1.RedeemTransaction.spent_vtxos:type_name -> ark.v1.Outpoint
-	42, // 28: ark.v1.RedeemTransaction.spendable_vtxos:type_name -> ark.v1.Vtxo
-	36, // 29: ark.v1.SignedVtxoOutpoint.outpoint:type_name -> ark.v1.Outpoint
-	47, // 30: ark.v1.SignedVtxoOutpoint.proof:type_name -> ark.v1.OwnershipProof
-	48, // 31: ark.v1.SetNostrRecipientRequest.vtxos:type_name -> ark.v1.SignedVtxoOutpoint
-	48, // 32: ark.v1.DeleteNostrRecipientRequest.vtxos:type_name -> ark.v1.SignedVtxoOutpoint
-	1,  // 33: ark.v1.ArkService.GetInfo:input_type -> ark.v1.GetInfoRequest
-	3,  // 34: ark.v1.ArkService.GetBoardingAddress:input_type -> ark.v1.GetBoardingAddressRequest
-	5,  // 35: ark.v1.ArkService.RegisterInputsForNextRound:input_type -> ark.v1.RegisterInputsForNextRoundRequest
-	7,  // 36: ark.v1.ArkService.RegisterOutputsForNextRound:input_type -> ark.v1.RegisterOutputsForNextRoundRequest
-	9,  // 37: ark.v1.ArkService.SubmitTreeNonces:input_type -> ark.v1.SubmitTreeNoncesRequest
-	11, // 38: ark.v1.ArkService.SubmitTreeSignatures:input_type -> ark.v1.SubmitTreeSignaturesRequest
-	13, // 39: ark.v1.ArkService.SubmitSignedForfeitTxs:input_type -> ark.v1.SubmitSignedForfeitTxsRequest
-	15, // 40: ark.v1.ArkService.GetEventStream:input_type -> ark.v1.GetEventStreamRequest
-	17, // 41: ark.v1.ArkService.Ping:input_type -> ark.v1.PingRequest
-	20, // 42: ark.v1.ArkService.CreatePayment:input_type -> ark.v1.CreatePaymentRequest
-	22, // 43: ark.v1.ArkService.CompletePayment:input_type -> ark.v1.CompletePaymentRequest
-	24, // 44: ark.v1.ArkService.GetRound:input_type -> ark.v1.GetRoundRequest
-	26, // 45: ark.v1.ArkService.GetRoundById:input_type -> ark.v1.GetRoundByIdRequest
-	28, // 46: ark.v1.ArkService.ListVtxos:input_type -> ark.v1.ListVtxosRequest
-	43, // 47: ark.v1.ArkService.GetTransactionsStream:input_type -> ark.v1.GetTransactionsStreamRequest
-	49, // 48: ark.v1.ArkService.SetNostrRecipient:input_type -> ark.v1.SetNostrRecipientRequest
-	51, // 49: ark.v1.ArkService.DeleteNostrRecipient:input_type -> ark.v1.DeleteNostrRecipientRequest
-	2,  // 50: ark.v1.ArkService.GetInfo:output_type -> ark.v1.GetInfoResponse
-	4,  // 51: ark.v1.ArkService.GetBoardingAddress:output_type -> ark.v1.GetBoardingAddressResponse
-	6,  // 52: ark.v1.ArkService.RegisterInputsForNextRound:output_type -> ark.v1.RegisterInputsForNextRoundResponse
-	8,  // 53: ark.v1.ArkService.RegisterOutputsForNextRound:output_type -> ark.v1.RegisterOutputsForNextRoundResponse
-	10, // 54: ark.v1.ArkService.SubmitTreeNonces:output_type -> ark.v1.SubmitTreeNoncesResponse
-	12, // 55: ark.v1.ArkService.SubmitTreeSignatures:output_type -> ark.v1.SubmitTreeSignaturesResponse
-	14, // 56: ark.v1.ArkService.SubmitSignedForfeitTxs:output_type -> ark.v1.SubmitSignedForfeitTxsResponse
-	16, // 57: ark.v1.ArkService.GetEventStream:output_type -> ark.v1.GetEventStreamResponse
-	18, // 58: ark.v1.ArkService.Ping:output_type -> ark.v1.PingResponse
-	21, // 59: ark.v1.ArkService.CreatePayment:output_type -> ark.v1.CreatePaymentResponse
-	23, // 60: ark.v1.ArkService.CompletePayment:output_type -> ark.v1.CompletePaymentResponse
-	25, // 61: ark.v1.ArkService.GetRound:output_type -> ark.v1.GetRoundResponse
-	27, // 62: ark.v1.ArkService.GetRoundById:output_type -> ark.v1.GetRoundByIdResponse
-	29, // 63: ark.v1.ArkService.ListVtxos:output_type -> ark.v1.ListVtxosResponse
-	44, // 64: ark.v1.ArkService.GetTransactionsStream:output_type -> ark.v1.GetTransactionsStreamResponse
-	50, // 65: ark.v1.ArkService.SetNostrRecipient:output_type -> ark.v1.SetNostrRecipientResponse
-	52, // 66: ark.v1.ArkService.DeleteNostrRecipient:output_type -> ark.v1.DeleteNostrRecipientResponse
-	50, // [50:67] is the sub-list for method output_type
-	33, // [33:50] is the sub-list for method input_type
-	33, // [33:33] is the sub-list for extension type_name
-	33, // [33:33] is the sub-list for extension extendee
-	0,  // [0:33] is the sub-list for field type_name
+	53, // 0: ark.v1.GetBoardingAddressResponse.tapscripts:type_name -> ark.v1.Tapscripts
+	37, // 1: ark.v1.RegisterInputsForNextRoundRequest.inputs:type_name -> ark.v1.Input
+	38, // 2: ark.v1.RegisterOutputsForNextRoundRequest.outputs:type_name -> ark.v1.Output
+	30, // 3: ark.v1.GetEventStreamResponse.round_finalization:type_name -> ark.v1.RoundFinalizationEvent
+	31, // 4: ark.v1.GetEventStreamResponse.round_finalized:type_name -> ark.v1.RoundFinalizedEvent
+	32, // 5: ark.v1.GetEventStreamResponse.round_failed:type_name -> ark.v1.RoundFailed
+	33, // 6: ark.v1.GetEventStreamResponse.round_signing:type_name -> ark.v1.RoundSigningEvent
+	34, // 7: ark.v1.GetEventStreamResponse.round_signing_nonces_generated:type_name -> ark.v1.RoundSigningNoncesGeneratedEvent
+	37, // 8: ark.v1.AsyncPaymentInput.input:type_name -> ark.v1.Input
+	19, // 9: ark.v1.CreatePaymentRequest.inputs:type_name -> ark.v1.AsyncPaymentInput
+	38, // 10: ark.v1.CreatePaymentRequest.outputs:type_name -> ark.v1.Output
+	35, // 11: ark.v1.GetRoundResponse.round:type_name -> ark.v1.Round
+	35, // 12: ark.v1.GetRoundByIdResponse.round:type_name -> ark.v1.Round
+	42, // 13: ark.v1.ListVtxosResponse.spendable_vtxos:type_name -> ark.v1.Vtxo
+	42, // 14: ark.v1.ListVtxosResponse.spent_vtxos:type_name -> ark.v1.Vtxo
+	39, // 15: ark.v1.RoundFinalizationEvent.vtxo_tree:type_name -> ark.v1.Tree
+	39, // 16: ark.v1.RoundSigningEvent.unsigned_vtxo_tree:type_name -> ark.v1.Tree
+	39, // 17: ark.v1.Round.vtxo_tree:type_name -> ark.v1.Tree
+	0,  // 18: ark.v1.Round.stage:type_name -> ark.v1.RoundStage
+	36, // 19: ark.v1.Input.outpoint:type_name -> ark.v1.Outpoint
+	53, // 20: ark.v1.Input.tapscripts:type_name -> ark.v1.Tapscripts
+	40, // 21: ark.v1.Tree.levels:type_name -> ark.v1.TreeLevel
+	41, // 22: ark.v1.TreeLevel.nodes:type_name -> ark.v1.Node
+	36, // 23: ark.v1.Vtxo.outpoint:type_name -> ark.v1.Outpoint
+	45, // 24: ark.v1.GetTransactionsStreamResponse.round:type_name -> ark.v1.RoundTransaction
+	46, // 25: ark.v1.GetTransactionsStreamResponse.redeem:type_name -> ark.v1.RedeemTransaction
+	36, // 26: ark.v1.RoundTransaction.spent_vtxos:type_name -> ark.v1.Outpoint
+	42, // 27: ark.v1.RoundTransaction.spendable_vtxos:type_name -> ark.v1.Vtxo
+	36, // 28: ark.v1.RoundTransaction.claimed_boarding_utxos:type_name -> ark.v1.Outpoint
+	36, // 29: ark.v1.RedeemTransaction.spent_vtxos:type_name -> ark.v1.Outpoint
+	42, // 30: ark.v1.RedeemTransaction.spendable_vtxos:type_name -> ark.v1.Vtxo
+	36, // 31: ark.v1.SignedVtxoOutpoint.outpoint:type_name -> ark.v1.Outpoint
+	47, // 32: ark.v1.SignedVtxoOutpoint.proof:type_name -> ark.v1.OwnershipProof
+	48, // 33: ark.v1.SetNostrRecipientRequest.vtxos:type_name -> ark.v1.SignedVtxoOutpoint
+	48, // 34: ark.v1.DeleteNostrRecipientRequest.vtxos:type_name -> ark.v1.SignedVtxoOutpoint
+	1,  // 35: ark.v1.ArkService.GetInfo:input_type -> ark.v1.GetInfoRequest
+	3,  // 36: ark.v1.ArkService.GetBoardingAddress:input_type -> ark.v1.GetBoardingAddressRequest
+	5,  // 37: ark.v1.ArkService.RegisterInputsForNextRound:input_type -> ark.v1.RegisterInputsForNextRoundRequest
+	7,  // 38: ark.v1.ArkService.RegisterOutputsForNextRound:input_type -> ark.v1.RegisterOutputsForNextRoundRequest
+	9,  // 39: ark.v1.ArkService.SubmitTreeNonces:input_type -> ark.v1.SubmitTreeNoncesRequest
+	11, // 40: ark.v1.ArkService.SubmitTreeSignatures:input_type -> ark.v1.SubmitTreeSignaturesRequest
+	13, // 41: ark.v1.ArkService.SubmitSignedForfeitTxs:input_type -> ark.v1.SubmitSignedForfeitTxsRequest
+	15, // 42: ark.v1.ArkService.GetEventStream:input_type -> ark.v1.GetEventStreamRequest
+	17, // 43: ark.v1.ArkService.Ping:input_type -> ark.v1.PingRequest
+	20, // 44: ark.v1.ArkService.CreatePayment:input_type -> ark.v1.CreatePaymentRequest
+	22, // 45: ark.v1.ArkService.CompletePayment:input_type -> ark.v1.CompletePaymentRequest
+	24, // 46: ark.v1.ArkService.GetRound:input_type -> ark.v1.GetRoundRequest
+	26, // 47: ark.v1.ArkService.GetRoundById:input_type -> ark.v1.GetRoundByIdRequest
+	28, // 48: ark.v1.ArkService.ListVtxos:input_type -> ark.v1.ListVtxosRequest
+	43, // 49: ark.v1.ArkService.GetTransactionsStream:input_type -> ark.v1.GetTransactionsStreamRequest
+	49, // 50: ark.v1.ArkService.SetNostrRecipient:input_type -> ark.v1.SetNostrRecipientRequest
+	51, // 51: ark.v1.ArkService.DeleteNostrRecipient:input_type -> ark.v1.DeleteNostrRecipientRequest
+	2,  // 52: ark.v1.ArkService.GetInfo:output_type -> ark.v1.GetInfoResponse
+	4,  // 53: ark.v1.ArkService.GetBoardingAddress:output_type -> ark.v1.GetBoardingAddressResponse
+	6,  // 54: ark.v1.ArkService.RegisterInputsForNextRound:output_type -> ark.v1.RegisterInputsForNextRoundResponse
+	8,  // 55: ark.v1.ArkService.RegisterOutputsForNextRound:output_type -> ark.v1.RegisterOutputsForNextRoundResponse
+	10, // 56: ark.v1.ArkService.SubmitTreeNonces:output_type -> ark.v1.SubmitTreeNoncesResponse
+	12, // 57: ark.v1.ArkService.SubmitTreeSignatures:output_type -> ark.v1.SubmitTreeSignaturesResponse
+	14, // 58: ark.v1.ArkService.SubmitSignedForfeitTxs:output_type -> ark.v1.SubmitSignedForfeitTxsResponse
+	16, // 59: ark.v1.ArkService.GetEventStream:output_type -> ark.v1.GetEventStreamResponse
+	18, // 60: ark.v1.ArkService.Ping:output_type -> ark.v1.PingResponse
+	21, // 61: ark.v1.ArkService.CreatePayment:output_type -> ark.v1.CreatePaymentResponse
+	23, // 62: ark.v1.ArkService.CompletePayment:output_type -> ark.v1.CompletePaymentResponse
+	25, // 63: ark.v1.ArkService.GetRound:output_type -> ark.v1.GetRoundResponse
+	27, // 64: ark.v1.ArkService.GetRoundById:output_type -> ark.v1.GetRoundByIdResponse
+	29, // 65: ark.v1.ArkService.ListVtxos:output_type -> ark.v1.ListVtxosResponse
+	44, // 66: ark.v1.ArkService.GetTransactionsStream:output_type -> ark.v1.GetTransactionsStreamResponse
+	50, // 67: ark.v1.ArkService.SetNostrRecipient:output_type -> ark.v1.SetNostrRecipientResponse
+	52, // 68: ark.v1.ArkService.DeleteNostrRecipient:output_type -> ark.v1.DeleteNostrRecipientResponse
+	52, // [52:69] is the sub-list for method output_type
+	35, // [35:52] is the sub-list for method input_type
+	35, // [35:35] is the sub-list for extension type_name
+	35, // [35:35] is the sub-list for extension extendee
+	0,  // [0:35] is the sub-list for field type_name
 }
 
 func init() { file_ark_v1_service_proto_init() }
@@ -4278,6 +4408,22 @@ func file_ark_v1_service_proto_init() {
 				return nil
 			}
 		}
+		file_ark_v1_service_proto_msgTypes[52].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Tapscripts); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	file_ark_v1_service_proto_msgTypes[3].OneofWrappers = []interface{}{
+		(*GetBoardingAddressResponse_Descriptor_)(nil),
+		(*GetBoardingAddressResponse_Tapscripts)(nil),
 	}
 	file_ark_v1_service_proto_msgTypes[4].OneofWrappers = []interface{}{}
 	file_ark_v1_service_proto_msgTypes[12].OneofWrappers = []interface{}{}
@@ -4288,6 +4434,10 @@ func file_ark_v1_service_proto_init() {
 		(*GetEventStreamResponse_RoundSigning)(nil),
 		(*GetEventStreamResponse_RoundSigningNoncesGenerated)(nil),
 	}
+	file_ark_v1_service_proto_msgTypes[36].OneofWrappers = []interface{}{
+		(*Input_Descriptor_)(nil),
+		(*Input_Tapscripts)(nil),
+	}
 	file_ark_v1_service_proto_msgTypes[43].OneofWrappers = []interface{}{
 		(*GetTransactionsStreamResponse_Round)(nil),
 		(*GetTransactionsStreamResponse_Redeem)(nil),
@@ -4298,7 +4448,7 @@ func file_ark_v1_service_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_ark_v1_service_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   52,
+			NumMessages:   53,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/common/bitcointree/builder.go b/common/bitcointree/builder.go
index e5a40e9..b27d93a 100644
--- a/common/bitcointree/builder.go
+++ b/common/bitcointree/builder.go
@@ -282,17 +282,19 @@ func createRootNode(
 func createAggregatedKeyWithSweep(
 	cosigners []*secp256k1.PublicKey, aspPubkey *secp256k1.PublicKey, roundLifetime int64,
 ) (*musig2.AggregateKey, *psbt.TaprootTapLeafScript, error) {
-	sweepClosure := &CSVSigClosure{
-		Pubkey:  aspPubkey,
-		Seconds: uint(roundLifetime),
+	sweepClosure := &tree.CSVSigClosure{
+		MultisigClosure: tree.MultisigClosure{PubKeys: []*secp256k1.PublicKey{aspPubkey}},
+		Seconds:         uint(roundLifetime),
 	}
 
-	sweepLeaf, err := sweepClosure.Leaf()
+	sweepScript, err := sweepClosure.Script()
 	if err != nil {
 		return nil, nil, err
 	}
 
-	tapTree := txscript.AssembleTaprootScriptTree(*sweepLeaf)
+	sweepLeaf := txscript.NewBaseTapLeaf(sweepScript)
+
+	tapTree := txscript.AssembleTaprootScriptTree(sweepLeaf)
 	tapTreeRoot := tapTree.RootNode.TapHash()
 
 	aggregatedKey, err := AggregateKeys(
diff --git a/common/bitcointree/musig2_test.go b/common/bitcointree/musig2_test.go
index fe7a927..ad9c5ce 100644
--- a/common/bitcointree/musig2_test.go
+++ b/common/bitcointree/musig2_test.go
@@ -1,7 +1,6 @@
 package bitcointree_test
 
 import (
-	"encoding/hex"
 	"encoding/json"
 	"os"
 	"testing"
@@ -49,7 +48,7 @@ func TestRoundTripSignTree(t *testing.T) {
 		)
 		require.NoError(t, err)
 
-		tree, err := bitcointree.CraftCongestionTree(
+		vtxoTree, err := bitcointree.CraftCongestionTree(
 			&wire.OutPoint{
 				Hash:  *testTxid,
 				Index: 0,
@@ -62,20 +61,21 @@ func TestRoundTripSignTree(t *testing.T) {
 		)
 		require.NoError(t, err)
 
-		sweepClosure := bitcointree.CSVSigClosure{
-			Pubkey:  asp.PubKey(),
-			Seconds: lifetime,
+		sweepClosure := &tree.CSVSigClosure{
+			MultisigClosure: tree.MultisigClosure{PubKeys: []*secp256k1.PublicKey{asp.PubKey()}},
+			Seconds:         uint(lifetime),
 		}
 
-		sweepTapLeaf, err := sweepClosure.Leaf()
+		sweepScript, err := sweepClosure.Script()
 		require.NoError(t, err)
 
-		sweepTapTree := txscript.AssembleTaprootScriptTree(*sweepTapLeaf)
+		sweepTapLeaf := txscript.NewBaseTapLeaf(sweepScript)
+		sweepTapTree := txscript.AssembleTaprootScriptTree(sweepTapLeaf)
 		root := sweepTapTree.RootNode.TapHash()
 
 		aspCoordinator, err := bitcointree.NewTreeCoordinatorSession(
 			sharedOutputAmount,
-			tree,
+			vtxoTree,
 			root.CloneBytes(),
 			cosignerPubKeys,
 		)
@@ -84,7 +84,7 @@ func TestRoundTripSignTree(t *testing.T) {
 		// Create signer sessions for all cosigners
 		signerSessions := make([]bitcointree.SignerSession, 20)
 		for i, cosigner := range cosigners {
-			signerSessions[i] = bitcointree.NewTreeSignerSession(cosigner, sharedOutputAmount, tree, root.CloneBytes())
+			signerSessions[i] = bitcointree.NewTreeSignerSession(cosigner, sharedOutputAmount, vtxoTree, root.CloneBytes())
 		}
 
 		// Get nonces from all signers
@@ -136,24 +136,6 @@ type receiverFixture struct {
 	Pubkey string `json:"pubkey"`
 }
 
-func (r receiverFixture) toVtxoScript(asp *secp256k1.PublicKey) bitcointree.VtxoScript {
-	bytesKey, err := hex.DecodeString(r.Pubkey)
-	if err != nil {
-		panic(err)
-	}
-
-	pubkey, err := secp256k1.ParsePubKey(bytesKey)
-	if err != nil {
-		panic(err)
-	}
-
-	return &bitcointree.DefaultVtxoScript{
-		Owner:     pubkey,
-		Asp:       asp,
-		ExitDelay: exitDelay,
-	}
-}
-
 func castReceivers(receivers []receiverFixture) []tree.VtxoLeaf {
 	receiversOut := make([]tree.VtxoLeaf, 0, len(receivers))
 	for _, r := range receivers {
diff --git a/common/bitcointree/script.go b/common/bitcointree/script.go
deleted file mode 100644
index 5e799fe..0000000
--- a/common/bitcointree/script.go
+++ /dev/null
@@ -1,203 +0,0 @@
-package bitcointree
-
-import (
-	"bytes"
-	"fmt"
-
-	"github.com/ark-network/ark/common"
-	"github.com/btcsuite/btcd/btcec/v2/schnorr"
-	"github.com/btcsuite/btcd/txscript"
-	"github.com/decred/dcrd/dcrec/secp256k1/v4"
-)
-
-type Closure interface {
-	Leaf() (*txscript.TapLeaf, error)
-	Decode(script []byte) (bool, error)
-}
-
-type CSVSigClosure struct {
-	Pubkey  *secp256k1.PublicKey
-	Seconds uint
-}
-
-type MultisigClosure struct {
-	Pubkey    *secp256k1.PublicKey
-	AspPubkey *secp256k1.PublicKey
-}
-
-func DecodeClosure(script []byte) (Closure, error) {
-	var closure Closure
-
-	closure = &CSVSigClosure{}
-	if valid, err := closure.Decode(script); err == nil && valid {
-		return closure, nil
-	}
-
-	closure = &MultisigClosure{}
-	if valid, err := closure.Decode(script); err == nil && valid {
-		return closure, nil
-	}
-
-	return nil, fmt.Errorf("invalid closure script")
-
-}
-
-func (f *MultisigClosure) Leaf() (*txscript.TapLeaf, error) {
-	aspKeyBytes := schnorr.SerializePubKey(f.AspPubkey)
-	userKeyBytes := schnorr.SerializePubKey(f.Pubkey)
-
-	script, err := txscript.NewScriptBuilder().AddData(aspKeyBytes).
-		AddOp(txscript.OP_CHECKSIGVERIFY).AddData(userKeyBytes).
-		AddOp(txscript.OP_CHECKSIG).Script()
-	if err != nil {
-		return nil, err
-	}
-
-	tapLeaf := txscript.NewBaseTapLeaf(script)
-	return &tapLeaf, nil
-}
-
-func (f *MultisigClosure) Decode(script []byte) (bool, error) {
-	valid, aspPubKey, err := decodeChecksigScript(script)
-	if err != nil {
-		return false, err
-	}
-
-	if !valid {
-		return false, nil
-	}
-
-	valid, pubkey, err := decodeChecksigScript(script[33:])
-	if err != nil {
-		return false, err
-	}
-
-	if !valid {
-		return false, nil
-	}
-
-	f.Pubkey = pubkey
-	f.AspPubkey = aspPubKey
-
-	rebuilt, err := f.Leaf()
-	if err != nil {
-		return false, err
-	}
-
-	if !bytes.Equal(rebuilt.Script, script) {
-		return false, nil
-	}
-
-	return true, nil
-}
-
-func (d *CSVSigClosure) Leaf() (*txscript.TapLeaf, error) {
-	script, err := encodeCsvWithChecksigScript(d.Pubkey, d.Seconds)
-	if err != nil {
-		return nil, err
-	}
-
-	tapLeaf := txscript.NewBaseTapLeaf(script)
-	return &tapLeaf, nil
-}
-
-func (d *CSVSigClosure) Decode(script []byte) (bool, error) {
-	csvIndex := bytes.Index(
-		script, []byte{txscript.OP_CHECKSEQUENCEVERIFY, txscript.OP_DROP},
-	)
-	if csvIndex == -1 || csvIndex == 0 {
-		return false, nil
-	}
-
-	sequence := script[:csvIndex]
-	if len(sequence) > 1 {
-		sequence = sequence[1:]
-	}
-
-	seconds, err := common.BIP68DecodeSequence(sequence)
-	if err != nil {
-		return false, err
-	}
-
-	checksigScript := script[csvIndex+2:]
-	valid, pubkey, err := decodeChecksigScript(checksigScript)
-	if err != nil {
-		return false, err
-	}
-
-	if !valid {
-		return false, nil
-	}
-
-	rebuilt, err := encodeCsvWithChecksigScript(pubkey, seconds)
-	if err != nil {
-		return false, err
-	}
-
-	if !bytes.Equal(rebuilt, script) {
-		return false, nil
-	}
-
-	d.Pubkey = pubkey
-	d.Seconds = seconds
-
-	return valid, nil
-}
-
-func decodeChecksigScript(script []byte) (bool, *secp256k1.PublicKey, error) {
-	data32Index := bytes.Index(script, []byte{txscript.OP_DATA_32})
-	if data32Index == -1 {
-		return false, nil, nil
-	}
-
-	key := script[data32Index+1 : data32Index+33]
-	if len(key) != 32 {
-		return false, nil, nil
-	}
-
-	pubkey, err := schnorr.ParsePubKey(key)
-	if err != nil {
-		return false, nil, err
-	}
-
-	return true, pubkey, nil
-}
-
-// checkSequenceVerifyScript without checksig
-func encodeCsvScript(seconds uint) ([]byte, error) {
-	sequence, err := common.BIP68Sequence(seconds)
-	if err != nil {
-		return nil, err
-	}
-
-	return txscript.NewScriptBuilder().
-		AddInt64(int64(sequence)).
-		AddOps([]byte{
-			txscript.OP_CHECKSEQUENCEVERIFY,
-			txscript.OP_DROP,
-		}).
-		Script()
-}
-
-// checkSequenceVerifyScript + checksig
-func encodeCsvWithChecksigScript(
-	pubkey *secp256k1.PublicKey, seconds uint,
-) ([]byte, error) {
-	script, err := encodeChecksigScript(pubkey)
-	if err != nil {
-		return nil, err
-	}
-
-	csvScript, err := encodeCsvScript(seconds)
-	if err != nil {
-		return nil, err
-	}
-
-	return append(csvScript, script...), nil
-}
-
-func encodeChecksigScript(pubkey *secp256k1.PublicKey) ([]byte, error) {
-	key := schnorr.SerializePubKey(pubkey)
-	return txscript.NewScriptBuilder().AddData(key).
-		AddOp(txscript.OP_CHECKSIG).Script()
-}
diff --git a/common/bitcointree/script_test.go b/common/bitcointree/script_test.go
deleted file mode 100644
index d71c8d5..0000000
--- a/common/bitcointree/script_test.go
+++ /dev/null
@@ -1,30 +0,0 @@
-package bitcointree_test
-
-import (
-	"testing"
-
-	"github.com/ark-network/ark/common/bitcointree"
-	"github.com/decred/dcrd/dcrec/secp256k1/v4"
-	"github.com/stretchr/testify/require"
-)
-
-func TestRoundTripCSV(t *testing.T) {
-	seckey, err := secp256k1.GeneratePrivateKey()
-	require.NoError(t, err)
-
-	csvSig := &bitcointree.CSVSigClosure{
-		Pubkey:  seckey.PubKey(),
-		Seconds: 1024,
-	}
-
-	leaf, err := csvSig.Leaf()
-	require.NoError(t, err)
-
-	var cl bitcointree.CSVSigClosure
-
-	valid, err := cl.Decode(leaf.Script)
-	require.NoError(t, err)
-	require.True(t, valid)
-
-	require.Equal(t, csvSig.Seconds, cl.Seconds)
-}
diff --git a/common/bitcointree/validation.go b/common/bitcointree/validation.go
index 9e8fab3..bb9dc6e 100644
--- a/common/bitcointree/validation.go
+++ b/common/bitcointree/validation.go
@@ -72,7 +72,7 @@ func UnspendableKey() *secp256k1.PublicKey {
 // - every control block and taproot output scripts
 // - input and output amounts
 func ValidateCongestionTree(
-	tree tree.CongestionTree, poolTx string, aspPublicKey *secp256k1.PublicKey, roundLifetime int64,
+	vtxoTree tree.CongestionTree, poolTx string, aspPublicKey *secp256k1.PublicKey, roundLifetime int64,
 ) error {
 	poolTransaction, err := psbt.NewFromRawBytes(strings.NewReader(poolTx), true)
 	if err != nil {
@@ -85,17 +85,17 @@ func ValidateCongestionTree(
 
 	poolTxAmount := poolTransaction.UnsignedTx.TxOut[sharedOutputIndex].Value
 
-	nbNodes := tree.NumberOfNodes()
+	nbNodes := vtxoTree.NumberOfNodes()
 	if nbNodes == 0 {
 		return ErrEmptyTree
 	}
 
-	if len(tree[0]) != 1 {
+	if len(vtxoTree[0]) != 1 {
 		return ErrInvalidRootLevel
 	}
 
 	// check that root input is connected to the pool tx
-	rootPsetB64 := tree[0][0].Tx
+	rootPsetB64 := vtxoTree[0][0].Tx
 	rootPset, err := psbt.NewFromRawBytes(strings.NewReader(rootPsetB64), true)
 	if err != nil {
 		return fmt.Errorf("invalid root transaction: %w", err)
@@ -120,28 +120,29 @@ func ValidateCongestionTree(
 		return ErrInvalidAmount
 	}
 
-	if len(tree.Leaves()) == 0 {
+	if len(vtxoTree.Leaves()) == 0 {
 		return ErrNoLeaves
 	}
 
-	sweepClosure := &CSVSigClosure{
-		Seconds: uint(roundLifetime),
-		Pubkey:  aspPublicKey,
+	sweepClosure := &tree.CSVSigClosure{
+		MultisigClosure: tree.MultisigClosure{PubKeys: []*secp256k1.PublicKey{aspPublicKey}},
+		Seconds:         uint(roundLifetime),
 	}
 
-	sweepLeaf, err := sweepClosure.Leaf()
+	sweepScript, err := sweepClosure.Script()
 	if err != nil {
 		return err
 	}
 
-	tapTree := txscript.AssembleTaprootScriptTree(*sweepLeaf)
+	sweepLeaf := txscript.NewBaseTapLeaf(sweepScript)
+	tapTree := txscript.AssembleTaprootScriptTree(sweepLeaf)
 	root := tapTree.RootNode.TapHash()
 
 	// iterates over all the nodes of the tree
-	for _, level := range tree {
+	for _, level := range vtxoTree {
 		for _, node := range level {
 			if err := validateNodeTransaction(
-				node, tree, root.CloneBytes(),
+				node, vtxoTree, root.CloneBytes(),
 			); err != nil {
 				return err
 			}
diff --git a/common/bitcointree/vtxo.go b/common/bitcointree/vtxo.go
index a8bf770..97d86d5 100644
--- a/common/bitcointree/vtxo.go
+++ b/common/bitcointree/vtxo.go
@@ -1,94 +1,52 @@
 package bitcointree
 
 import (
-	"encoding/hex"
 	"fmt"
 
 	"github.com/ark-network/ark/common"
-	"github.com/ark-network/ark/common/descriptor"
-	"github.com/btcsuite/btcd/btcec/v2/schnorr"
+	"github.com/ark-network/ark/common/tree"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/decred/dcrd/dcrec/secp256k1/v4"
 )
 
-type VtxoScript common.VtxoScript[bitcoinTapTree]
+type VtxoScript common.VtxoScript[bitcoinTapTree, *tree.MultisigClosure, *tree.CSVSigClosure]
 
-func ParseVtxoScript(desc string) (VtxoScript, error) {
+func ParseVtxoScript(scripts []string) (VtxoScript, error) {
 	types := []VtxoScript{
-		&DefaultVtxoScript{},
+		&TapscriptsVtxoScript{},
 	}
 
 	for _, v := range types {
-		if err := v.FromDescriptor(desc); err == nil {
+		if err := v.Decode(scripts); err == nil {
 			return v, nil
 		}
 	}
 
-	return nil, fmt.Errorf("invalid vtxo descriptor: %s", desc)
+	return nil, fmt.Errorf("invalid vtxo scripts: %s", scripts)
 }
 
-/*
-* DefaultVtxoScript is the default implementation of VTXO with 2 closures
-* - Owner and ASP (forfeit)
-*	- Owner after t (unilateral exit)
- */
-type DefaultVtxoScript struct {
-	Owner     *secp256k1.PublicKey
-	Asp       *secp256k1.PublicKey
-	ExitDelay uint
+func NewDefaultVtxoScript(owner, asp *secp256k1.PublicKey, exitDelay uint) VtxoScript {
+	base := tree.NewDefaultVtxoScript(owner, asp, exitDelay)
+
+	return &TapscriptsVtxoScript{*base}
 }
 
-func (v *DefaultVtxoScript) ToDescriptor() string {
-	owner := hex.EncodeToString(schnorr.SerializePubKey(v.Owner))
-
-	return fmt.Sprintf(
-		descriptor.DefaultVtxoDescriptorTemplate,
-		hex.EncodeToString(UnspendableKey().SerializeCompressed()),
-		owner,
-		hex.EncodeToString(schnorr.SerializePubKey(v.Asp)),
-		v.ExitDelay,
-		owner,
-	)
+type TapscriptsVtxoScript struct {
+	tree.TapscriptsVtxoScript
 }
 
-func (v *DefaultVtxoScript) FromDescriptor(desc string) error {
-	owner, asp, exitDelay, err := descriptor.ParseDefaultVtxoDescriptor(desc)
-	if err != nil {
-		return err
+func (v *TapscriptsVtxoScript) TapTree() (*secp256k1.PublicKey, bitcoinTapTree, error) {
+	leaves := make([]txscript.TapLeaf, len(v.Closures))
+	for i, closure := range v.Closures {
+		script, err := closure.Script()
+		if err != nil {
+			return nil, bitcoinTapTree{}, fmt.Errorf("failed to get script for closure %d: %w", i, err)
+		}
+		leaves[i] = txscript.NewBaseTapLeaf(script)
 	}
 
-	v.Owner = owner
-	v.Asp = asp
-	v.ExitDelay = exitDelay
-	return nil
-}
-
-func (v *DefaultVtxoScript) TapTree() (*secp256k1.PublicKey, bitcoinTapTree, error) {
-	redeemClosure := &CSVSigClosure{
-		Pubkey:  v.Owner,
-		Seconds: v.ExitDelay,
-	}
-
-	redeemLeaf, err := redeemClosure.Leaf()
-	if err != nil {
-		return nil, bitcoinTapTree{}, err
-	}
-
-	forfeitClosure := &MultisigClosure{
-		Pubkey:    v.Owner,
-		AspPubkey: v.Asp,
-	}
-
-	forfeitLeaf, err := forfeitClosure.Leaf()
-	if err != nil {
-		return nil, bitcoinTapTree{}, err
-	}
-
-	tapTree := txscript.AssembleTaprootScriptTree(
-		*redeemLeaf, *forfeitLeaf,
-	)
-
+	tapTree := txscript.AssembleTaprootScriptTree(leaves...)
 	root := tapTree.RootNode.TapHash()
 	taprootKey := txscript.ComputeTaprootOutputKey(
 		UnspendableKey(),
diff --git a/common/bitcointree/vtxo_test.go b/common/bitcointree/vtxo_test.go
deleted file mode 100644
index 271b903..0000000
--- a/common/bitcointree/vtxo_test.go
+++ /dev/null
@@ -1,43 +0,0 @@
-package bitcointree_test
-
-import (
-	"encoding/hex"
-	"fmt"
-	"testing"
-
-	"github.com/ark-network/ark/common/bitcointree"
-	"github.com/ark-network/ark/common/descriptor"
-	"github.com/btcsuite/btcd/btcec/v2/schnorr"
-	"github.com/decred/dcrd/dcrec/secp256k1/v4"
-	"github.com/stretchr/testify/require"
-)
-
-func TestParseDescriptor(t *testing.T) {
-	aspKey, err := secp256k1.GeneratePrivateKey()
-	require.NoError(t, err)
-
-	aliceKey, err := secp256k1.GeneratePrivateKey()
-	require.NoError(t, err)
-
-	aspPubKey := hex.EncodeToString(schnorr.SerializePubKey(aspKey.PubKey()))
-	alicePubKey := hex.EncodeToString(schnorr.SerializePubKey(aliceKey.PubKey()))
-
-	unspendableKey := hex.EncodeToString(bitcointree.UnspendableKey().SerializeCompressed())
-
-	defaultScriptDescriptor := fmt.Sprintf(
-		descriptor.DefaultVtxoDescriptorTemplate,
-		unspendableKey,
-		alicePubKey,
-		aspPubKey,
-		512,
-		alicePubKey,
-	)
-
-	vtxo, err := bitcointree.ParseVtxoScript(defaultScriptDescriptor)
-	require.NoError(t, err)
-
-	require.IsType(t, &bitcointree.DefaultVtxoScript{}, vtxo)
-	require.Equal(t, defaultScriptDescriptor, vtxo.ToDescriptor())
-	require.Equal(t, alicePubKey, hex.EncodeToString(schnorr.SerializePubKey(vtxo.(*bitcointree.DefaultVtxoScript).Owner)))
-	require.Equal(t, aspPubKey, hex.EncodeToString(schnorr.SerializePubKey(vtxo.(*bitcointree.DefaultVtxoScript).Asp)))
-}
diff --git a/common/tree/builder.go b/common/tree/builder.go
index 61741f3..4668bf2 100644
--- a/common/tree/builder.go
+++ b/common/tree/builder.go
@@ -163,11 +163,11 @@ func (n *node) getWitnessData() (
 	}
 
 	sweepClosure := &CSVSigClosure{
-		Pubkey:  n.sweepKey,
-		Seconds: uint(n.roundLifetime),
+		MultisigClosure: MultisigClosure{PubKeys: []*secp256k1.PublicKey{n.sweepKey}},
+		Seconds:         uint(n.roundLifetime),
 	}
 
-	sweepLeaf, err := sweepClosure.Leaf()
+	sweepLeaf, err := sweepClosure.Script()
 	if err != nil {
 		return nil, nil, err
 	}
@@ -183,13 +183,14 @@ func (n *node) getWitnessData() (
 			MinRelayFee: n.feeSats,
 		}
 
-		unrollLeaf, err := unrollClosure.Leaf()
+		unrollScript, err := unrollClosure.Script()
 		if err != nil {
 			return nil, nil, err
 		}
 
 		branchTaprootTree := taproot.AssembleTaprootScriptTree(
-			*unrollLeaf, *sweepLeaf,
+			taproot.NewBaseTapElementsLeaf(unrollScript),
+			taproot.NewBaseTapElementsLeaf(sweepLeaf),
 		)
 		root := branchTaprootTree.RootNode.TapHash()
 
@@ -224,13 +225,14 @@ func (n *node) getWitnessData() (
 		RightAmount: rightAmount,
 	}
 
-	unrollLeaf, err := unrollClosure.Leaf()
+	unrollLeaf, err := unrollClosure.Script()
 	if err != nil {
 		return nil, nil, err
 	}
 
 	branchTaprootTree := taproot.AssembleTaprootScriptTree(
-		*unrollLeaf, *sweepLeaf,
+		taproot.NewBaseTapElementsLeaf(unrollLeaf),
+		taproot.NewBaseTapElementsLeaf(sweepLeaf),
 	)
 	root := branchTaprootTree.RootNode.TapHash()
 
diff --git a/common/tree/script.go b/common/tree/script.go
index 1a7f56f..726a69c 100644
--- a/common/tree/script.go
+++ b/common/tree/script.go
@@ -9,8 +9,8 @@ import (
 	"github.com/ark-network/ark/common"
 	"github.com/btcsuite/btcd/btcec/v2/schnorr"
 	"github.com/btcsuite/btcd/txscript"
+	"github.com/btcsuite/btcd/wire"
 	"github.com/decred/dcrd/dcrec/secp256k1/v4"
-	"github.com/vulpemventures/go-elements/taproot"
 )
 
 const (
@@ -21,108 +21,333 @@ const (
 	OP_SUB64                     = 0xd8
 )
 
+type MultisigType int
+
+const (
+	MultisigTypeChecksig MultisigType = iota
+	MultisigTypeChecksigAdd
+)
+
 type Closure interface {
-	Leaf() (*taproot.TapElementsLeaf, error)
+	Script() ([]byte, error)
 	Decode(script []byte) (bool, error)
+	// WitnessSize returns the size of the witness excluding the script and control block
+	WitnessSize() int
+	Witness(controlBlock []byte, signatures map[string][]byte) (wire.TxWitness, error)
 }
 
+// UnrollClosure is liquid-only tapscript letting to enforce
+// unrollable UTXO without musig.
 type UnrollClosure struct {
 	LeftKey, RightKey       *secp256k1.PublicKey
 	LeftAmount, RightAmount uint64
 	MinRelayFee             uint64
 }
 
+// MultisigClosure is a closure that contains a list of public keys and a
+// CHECKSIG for each key. The witness size is 64 bytes per key, admitting the
+// sighash type is SIGHASH_DEFAULT.
+type MultisigClosure struct {
+	PubKeys []*secp256k1.PublicKey
+	Type    MultisigType
+}
+
+// CSVSigClosure is a closure that contains a list of public keys and a
+// CHECKSEQUENCEVERIFY + DROP. The witness size is 64 bytes per key, admitting
+// the sighash type is SIGHASH_DEFAULT.
 type CSVSigClosure struct {
-	Pubkey  *secp256k1.PublicKey
+	MultisigClosure
 	Seconds uint
 }
 
-type MultisigClosure struct {
-	Pubkey    *secp256k1.PublicKey
-	AspPubkey *secp256k1.PublicKey
-}
-
 func DecodeClosure(script []byte) (Closure, error) {
-	var closure Closure
-
-	closure = &UnrollClosure{}
-	if valid, err := closure.Decode(script); err == nil && valid {
-		return closure, nil
+	types := []Closure{
+		&CSVSigClosure{},
+		&MultisigClosure{},
+		&UnrollClosure{},
 	}
 
-	closure = &CSVSigClosure{}
-	if valid, err := closure.Decode(script); err == nil && valid {
-		return closure, nil
-	}
-
-	closure = &MultisigClosure{}
-	if valid, err := closure.Decode(script); err == nil && valid {
-		return closure, nil
+	for _, closure := range types {
+		if valid, err := closure.Decode(script); err == nil && valid {
+			return closure, nil
+		}
 	}
 
 	return nil, fmt.Errorf("invalid closure script %s", hex.EncodeToString(script))
 }
 
-func (f *MultisigClosure) Leaf() (*taproot.TapElementsLeaf, error) {
-	aspKeyBytes := schnorr.SerializePubKey(f.AspPubkey)
-	userKeyBytes := schnorr.SerializePubKey(f.Pubkey)
+func (f *MultisigClosure) WitnessSize() int {
+	return 64 * len(f.PubKeys)
+}
 
-	script, err := txscript.NewScriptBuilder().AddData(aspKeyBytes).
-		AddOp(txscript.OP_CHECKSIGVERIFY).AddData(userKeyBytes).
-		AddOp(txscript.OP_CHECKSIG).Script()
-	if err != nil {
-		return nil, err
+func (f *MultisigClosure) Script() ([]byte, error) {
+	scriptBuilder := txscript.NewScriptBuilder()
+
+	switch f.Type {
+	case MultisigTypeChecksig:
+		for i, pubkey := range f.PubKeys {
+			scriptBuilder.AddData(schnorr.SerializePubKey(pubkey))
+			if i == len(f.PubKeys)-1 {
+				scriptBuilder.AddOp(txscript.OP_CHECKSIG)
+				continue
+			}
+			scriptBuilder.AddOp(txscript.OP_CHECKSIGVERIFY)
+		}
+	case MultisigTypeChecksigAdd:
+		for i, pubkey := range f.PubKeys {
+			scriptBuilder.AddData(schnorr.SerializePubKey(pubkey))
+			if i == 0 {
+				scriptBuilder.AddOp(txscript.OP_CHECKSIG)
+				continue
+			}
+			scriptBuilder.AddOp(txscript.OP_CHECKSIGADD)
+		}
+		scriptBuilder.AddInt64(int64(len(f.PubKeys)))
+		scriptBuilder.AddOp(txscript.OP_EQUAL)
 	}
 
-	tapLeaf := taproot.NewBaseTapElementsLeaf(script)
-	return &tapLeaf, nil
+	return scriptBuilder.Script()
 }
 
 func (f *MultisigClosure) Decode(script []byte) (bool, error) {
-	valid, aspPubKey, err := decodeChecksigScript(script)
-	if err != nil {
-		return false, err
+	if len(script) == 0 {
+		return false, fmt.Errorf("empty script")
 	}
 
-	if !valid {
+	valid, err := f.decodeChecksig(script)
+	if err != nil {
+		return false, fmt.Errorf("failed to decode checksig: %w", err)
+	}
+	if valid {
+		return true, nil
+	}
+
+	valid, err = f.decodeChecksigAdd(script)
+	if err != nil {
+		return false, fmt.Errorf("failed to decode checksigadd: %w", err)
+	}
+	if valid {
+		return valid, nil
+	}
+
+	return false, nil
+}
+
+func (f *MultisigClosure) decodeChecksigAdd(script []byte) (bool, error) {
+	pubkeys := make([]*secp256k1.PublicKey, 0)
+
+	// Keep track of position in script
+	pos := 0
+
+	for pos < len(script) {
+		// Check for 33-byte data push (32 bytes for pubkey + 1 byte for OP_DATA)
+		if pos+33 > len(script) {
+			break
+		}
+
+		// Verify we have a 32-byte data push
+		if script[pos] != txscript.OP_DATA_32 {
+			return false, nil
+		}
+
+		// Parse the public key
+		pubkey, err := schnorr.ParsePubKey(script[pos+1 : pos+33])
+		if err != nil {
+			return false, err
+		}
+
+		pubkeys = append(pubkeys, pubkey)
+		pos += 33
+
+		// Check if we've reached the end
+		if pos >= len(script) {
+			return false, nil
+		}
+
+		// Check for CHECKSIG or CHECKSIGADD pattern
+		if len(pubkeys) == 1 && script[pos] == txscript.OP_CHECKSIG {
+			pos++
+		} else if len(pubkeys) > 1 && script[pos] == txscript.OP_CHECKSIGADD {
+			pos++
+		} else {
+			return false, nil
+		}
+	}
+
+	lastOp := script[len(script)-1]
+	if lastOp != txscript.OP_EQUAL {
 		return false, nil
 	}
 
-	valid, pubkey, err := decodeChecksigScript(script[33:])
-	if err != nil {
-		return false, err
-	}
-
-	if !valid {
+	// Verify we found at least one public key
+	if len(pubkeys) == 0 {
 		return false, nil
 	}
 
-	f.Pubkey = pubkey
-	f.AspPubkey = aspPubKey
+	f.PubKeys = pubkeys
+	f.Type = MultisigTypeChecksigAdd
 
-	rebuilt, err := f.Leaf()
+	// Verify the script matches what we would generate
+	rebuilt, err := f.Script()
 	if err != nil {
+		f.PubKeys = nil
+		f.Type = 0
 		return false, err
 	}
 
-	if !bytes.Equal(rebuilt.Script, script) {
+	if !bytes.Equal(rebuilt, script) {
+		f.PubKeys = nil
+		f.Type = 0
 		return false, nil
 	}
 
 	return true, nil
 }
 
-func (d *CSVSigClosure) Leaf() (*taproot.TapElementsLeaf, error) {
-	script, err := encodeCsvWithChecksigScript(d.Pubkey, d.Seconds)
+func (f *MultisigClosure) decodeChecksig(script []byte) (bool, error) {
+	pubkeys := make([]*secp256k1.PublicKey, 0)
+
+	// Keep track of position in script
+	pos := 0
+
+	for pos < len(script) {
+		// Check for 33-byte data push (32 bytes for pubkey + 1 byte for OP_DATA)
+		if pos+33 > len(script) {
+			return false, nil
+		}
+
+		// Verify we have a 32-byte data push
+		if script[pos] != txscript.OP_DATA_32 {
+			return false, nil
+		}
+
+		// Parse the public key
+		pubkey, err := schnorr.ParsePubKey(script[pos+1 : pos+33])
+		if err != nil {
+			return false, err
+		}
+
+		pubkeys = append(pubkeys, pubkey)
+		pos += 33
+
+		// Check if we've reached the end
+		if pos >= len(script) {
+			return false, nil
+		}
+
+		// Next byte should be either CHECKSIG (last key) or CHECKSIGVERIFY
+		if script[pos] == txscript.OP_CHECKSIG {
+			// This should be the last operation
+			if pos != len(script)-1 {
+				return false, nil
+			}
+			break
+		} else if script[pos] == txscript.OP_CHECKSIGVERIFY {
+			pos++
+			continue
+		} else {
+			return false, nil
+		}
+	}
+
+	// Verify we found at least one public key
+	if len(pubkeys) == 0 {
+		return false, nil
+	}
+
+	f.PubKeys = pubkeys
+	f.Type = MultisigTypeChecksig
+
+	// Verify the script matches what we would generate
+	rebuilt, err := f.Script()
+	if err != nil {
+		f.PubKeys = nil
+		f.Type = 0
+		return false, err
+	}
+
+	if !bytes.Equal(rebuilt, script) {
+		f.PubKeys = nil
+		f.Type = 0
+		return false, nil
+	}
+
+	return true, nil
+}
+
+func (f *MultisigClosure) Witness(controlBlock []byte, signatures map[string][]byte) (wire.TxWitness, error) {
+	// Create witness stack with capacity for all signatures plus script and control block
+	witness := make(wire.TxWitness, 0, len(f.PubKeys)+2)
+
+	// Add signatures in the reverse order as public keys
+	for i := len(f.PubKeys) - 1; i >= 0; i-- {
+		pubKey := f.PubKeys[i]
+		sig, ok := signatures[hex.EncodeToString(schnorr.SerializePubKey(pubKey))]
+		if !ok {
+			return nil, fmt.Errorf("missing signature for public key %x", schnorr.SerializePubKey(pubKey))
+		}
+		witness = append(witness, sig)
+	}
+
+	// Get script
+	script, err := f.Script()
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate script: %w", err)
+	}
+
+	// Add script and control block
+	witness = append(witness, script)
+	witness = append(witness, controlBlock)
+
+	return witness, nil
+}
+
+func (f *CSVSigClosure) Witness(controlBlock []byte, signatures map[string][]byte) (wire.TxWitness, error) {
+	multisigWitness, err := f.MultisigClosure.Witness(controlBlock, signatures)
 	if err != nil {
 		return nil, err
 	}
 
-	tapLeaf := taproot.NewBaseTapElementsLeaf(script)
-	return &tapLeaf, nil
+	script, err := f.Script()
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate script: %w", err)
+	}
+
+	// replace script with csv script
+	multisigWitness[len(multisigWitness)-2] = script
+
+	return multisigWitness, nil
+}
+
+func (f *CSVSigClosure) WitnessSize() int {
+	return f.MultisigClosure.WitnessSize()
+}
+
+func (d *CSVSigClosure) Script() ([]byte, error) {
+	csvScript, err := txscript.NewScriptBuilder().
+		AddInt64(int64(d.Seconds)).
+		AddOps([]byte{
+			txscript.OP_CHECKSEQUENCEVERIFY,
+			txscript.OP_DROP,
+		}).
+		Script()
+	if err != nil {
+		return nil, err
+	}
+
+	multisigScript, err := d.MultisigClosure.Script()
+	if err != nil {
+		return nil, err
+	}
+
+	return append(csvScript, multisigScript...), nil
 }
 
 func (d *CSVSigClosure) Decode(script []byte) (bool, error) {
+	if len(script) == 0 {
+		return false, fmt.Errorf("empty script")
+	}
+
 	csvIndex := bytes.Index(
 		script, []byte{txscript.OP_CHECKSEQUENCEVERIFY, txscript.OP_DROP},
 	)
@@ -140,8 +365,8 @@ func (d *CSVSigClosure) Decode(script []byte) (bool, error) {
 		return false, err
 	}
 
-	checksigScript := script[csvIndex+2:]
-	valid, pubkey, err := decodeChecksigScript(checksigScript)
+	multisigClosure := &MultisigClosure{}
+	valid, err := multisigClosure.Decode(script[csvIndex+2:])
 	if err != nil {
 		return false, err
 	}
@@ -150,26 +375,21 @@ func (d *CSVSigClosure) Decode(script []byte) (bool, error) {
 		return false, nil
 	}
 
-	rebuilt, err := encodeCsvWithChecksigScript(pubkey, seconds)
-	if err != nil {
-		return false, err
-	}
-
-	if !bytes.Equal(rebuilt, script) {
-		return false, nil
-	}
-
-	d.Pubkey = pubkey
 	d.Seconds = seconds
+	d.MultisigClosure = *multisigClosure
 
 	return valid, nil
 }
 
+func (c *UnrollClosure) WitnessSize() int {
+	return 0
+}
+
 func (c *UnrollClosure) isOneChild() bool {
 	return c.RightKey == nil && c.MinRelayFee > 0
 }
 
-func (c *UnrollClosure) Leaf() (*taproot.TapElementsLeaf, error) {
+func (c *UnrollClosure) Script() ([]byte, error) {
 	if c.LeftKey == nil {
 		return nil, fmt.Errorf("left key is required")
 	}
@@ -178,8 +398,7 @@ func (c *UnrollClosure) Leaf() (*taproot.TapElementsLeaf, error) {
 		branchScript := encodeOneChildIntrospectionScript(
 			txscript.OP_0, schnorr.SerializePubKey(c.LeftKey), c.MinRelayFee,
 		)
-		leaf := taproot.NewBaseTapElementsLeaf(branchScript)
-		return &leaf, nil
+		return branchScript, nil
 	}
 
 	if c.LeftAmount == 0 {
@@ -205,8 +424,7 @@ func (c *UnrollClosure) Leaf() (*taproot.TapElementsLeaf, error) {
 	)
 	branchScript = append(branchScript, nextScriptRight...)
 
-	leaf := taproot.NewBaseTapElementsLeaf(branchScript)
-	return &leaf, nil
+	return branchScript, nil
 }
 
 func (c *UnrollClosure) Decode(script []byte) (valid bool, err error) {
@@ -227,12 +445,12 @@ func (c *UnrollClosure) Decode(script []byte) (valid bool, err error) {
 		c.LeftKey = pubkey
 		c.MinRelayFee = minrelayfee
 
-		rebuilt, err := c.Leaf()
+		rebuilt, err := c.Script()
 		if err != nil {
 			return false, err
 		}
 
-		if !bytes.Equal(rebuilt.Script, script) {
+		if !bytes.Equal(rebuilt, script) {
 			return false, nil
 		}
 
@@ -272,12 +490,12 @@ func (c *UnrollClosure) Decode(script []byte) (valid bool, err error) {
 	c.RightAmount = rightAmount
 	c.RightKey = rightKey
 
-	rebuilt, err := c.Leaf()
+	rebuilt, err := c.Script()
 	if err != nil {
 		return false, err
 	}
 
-	if !bytes.Equal(rebuilt.Script, script) {
+	if !bytes.Equal(rebuilt, script) {
 		return false, nil
 	}
 
@@ -351,64 +569,6 @@ func decodeOneChildIntrospectionScript(
 	return true, pubkey, minrelayfee, nil
 }
 
-func decodeChecksigScript(script []byte) (bool, *secp256k1.PublicKey, error) {
-	data32Index := bytes.Index(script, []byte{txscript.OP_DATA_32})
-	if data32Index == -1 {
-		return false, nil, nil
-	}
-
-	key := script[data32Index+1 : data32Index+33]
-	if len(key) != 32 {
-		return false, nil, nil
-	}
-
-	pubkey, err := schnorr.ParsePubKey(key)
-	if err != nil {
-		return false, nil, err
-	}
-
-	return true, pubkey, nil
-}
-
-// checkSequenceVerifyScript without checksig
-func encodeCsvScript(seconds uint) ([]byte, error) {
-	sequence, err := common.BIP68Sequence(seconds)
-	if err != nil {
-		return nil, err
-	}
-
-	return txscript.NewScriptBuilder().
-		AddInt64(int64(sequence)).
-		AddOps([]byte{
-			txscript.OP_CHECKSEQUENCEVERIFY,
-			txscript.OP_DROP,
-		}).
-		Script()
-}
-
-// checkSequenceVerifyScript + checksig
-func encodeCsvWithChecksigScript(
-	pubkey *secp256k1.PublicKey, seconds uint,
-) ([]byte, error) {
-	script, err := encodeChecksigScript(pubkey)
-	if err != nil {
-		return nil, err
-	}
-
-	csvScript, err := encodeCsvScript(seconds)
-	if err != nil {
-		return nil, err
-	}
-
-	return append(csvScript, script...), nil
-}
-
-func encodeChecksigScript(pubkey *secp256k1.PublicKey) ([]byte, error) {
-	key := schnorr.SerializePubKey(pubkey)
-	return txscript.NewScriptBuilder().AddData(key).
-		AddOp(txscript.OP_CHECKSIG).Script()
-}
-
 // encodeIntrospectionScript returns an introspection script that checks the
 // script and the amount of the output at the given index verify will add an
 // OP_EQUALVERIFY at the end of the script, otherwise it will add an OP_EQUAL
@@ -496,3 +656,13 @@ func encodeOneChildIntrospectionScript(
 
 	return script
 }
+
+func (c *UnrollClosure) Witness(controlBlock []byte, _ map[string][]byte) (wire.TxWitness, error) {
+	script, err := c.Script()
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate script: %w", err)
+	}
+
+	// UnrollClosure only needs script and control block
+	return wire.TxWitness{script, controlBlock}, nil
+}
diff --git a/common/tree/script_test.go b/common/tree/script_test.go
new file mode 100644
index 0000000..18e6026
--- /dev/null
+++ b/common/tree/script_test.go
@@ -0,0 +1,471 @@
+package tree_test
+
+import (
+	"encoding/hex"
+	"testing"
+
+	"github.com/ark-network/ark/common/tree"
+	"github.com/btcsuite/btcd/btcec/v2/schnorr"
+	"github.com/btcsuite/btcd/txscript"
+	"github.com/decred/dcrd/dcrec/secp256k1/v4"
+	"github.com/stretchr/testify/require"
+)
+
+func TestRoundTripCSV(t *testing.T) {
+	seckey, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+
+	csvSig := &tree.CSVSigClosure{
+		MultisigClosure: tree.MultisigClosure{
+			PubKeys: []*secp256k1.PublicKey{seckey.PubKey()},
+		},
+		Seconds: 1024,
+	}
+
+	leaf, err := csvSig.Script()
+	require.NoError(t, err)
+
+	var cl tree.CSVSigClosure
+
+	valid, err := cl.Decode(leaf)
+	require.NoError(t, err)
+	require.True(t, valid)
+
+	require.Equal(t, csvSig.Seconds, cl.Seconds)
+}
+
+func TestMultisigClosure(t *testing.T) {
+	// Generate some test keys
+	privKey1, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+	pubKey1 := privKey1.PubKey()
+
+	privKey2, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+	pubKey2 := privKey2.PubKey()
+
+	t.Run("valid 2-of-2 multisig", func(t *testing.T) {
+		closure := &tree.MultisigClosure{
+			PubKeys: []*secp256k1.PublicKey{pubKey1, pubKey2},
+		}
+
+		// Generate script
+		script, err := closure.Script()
+		require.NoError(t, err)
+
+		// Test decoding
+		decodedClosure := &tree.MultisigClosure{}
+		valid, err := decodedClosure.Decode(script)
+		require.NoError(t, err)
+		require.True(t, valid)
+		require.Equal(t, 2, len(decodedClosure.PubKeys))
+
+		// Compare serialized pubkeys
+		require.Equal(t,
+			schnorr.SerializePubKey(pubKey1),
+			schnorr.SerializePubKey(decodedClosure.PubKeys[0]),
+		)
+		require.Equal(t,
+			schnorr.SerializePubKey(pubKey2),
+			schnorr.SerializePubKey(decodedClosure.PubKeys[1]),
+		)
+	})
+
+	t.Run("valid single key multisig", func(t *testing.T) {
+		closure := &tree.MultisigClosure{
+			PubKeys: []*secp256k1.PublicKey{pubKey1},
+		}
+
+		script, err := closure.Script()
+		require.NoError(t, err)
+
+		decodedClosure := &tree.MultisigClosure{}
+		valid, err := decodedClosure.Decode(script)
+		require.NoError(t, err)
+		require.True(t, valid)
+		require.Equal(t, 1, len(decodedClosure.PubKeys))
+
+		// Compare serialized pubkey
+		require.Equal(t,
+			schnorr.SerializePubKey(pubKey1),
+			schnorr.SerializePubKey(decodedClosure.PubKeys[0]),
+		)
+	})
+
+	t.Run("invalid empty script", func(t *testing.T) {
+		closure := &tree.MultisigClosure{}
+		valid, err := closure.Decode([]byte{})
+		require.Error(t, err)
+		require.False(t, valid)
+	})
+
+	t.Run("invalid script - wrong data push", func(t *testing.T) {
+		script := []byte{
+			txscript.OP_DATA_33, // Wrong size for schnorr pubkey
+		}
+		closure := &tree.MultisigClosure{}
+		valid, err := closure.Decode(script)
+		require.NoError(t, err)
+		require.False(t, valid)
+	})
+
+	t.Run("invalid script - missing checksig", func(t *testing.T) {
+		pubKeyBytes := schnorr.SerializePubKey(pubKey1)
+		script := []byte{txscript.OP_DATA_32}
+		script = append(script, pubKeyBytes...)
+		// Missing OP_CHECKSIG
+
+		closure := &tree.MultisigClosure{}
+		valid, err := closure.Decode(script)
+		require.NoError(t, err)
+		require.False(t, valid)
+	})
+
+	t.Run("invalid script - extra data after checksig", func(t *testing.T) {
+		pubKeyBytes := schnorr.SerializePubKey(pubKey1)
+		script := []byte{txscript.OP_DATA_32}
+		script = append(script, pubKeyBytes...)
+		script = append(script, txscript.OP_CHECKSIG)
+		script = append(script, 0x00) // Extra unwanted byte
+
+		closure := &tree.MultisigClosure{}
+		valid, err := closure.Decode(script)
+		require.NoError(t, err)
+		require.False(t, valid)
+	})
+
+	t.Run("witness size", func(t *testing.T) {
+		closure := &tree.MultisigClosure{
+			PubKeys: []*secp256k1.PublicKey{pubKey1, pubKey2},
+		}
+
+		require.Equal(t, 128, closure.WitnessSize()) // 64 * 2 bytes
+	})
+
+	t.Run("valid 12-of-12 multisig", func(t *testing.T) {
+		// Generate 12 keys
+		pubKeys := make([]*secp256k1.PublicKey, 12)
+		for i := 0; i < 12; i++ {
+			privKey, err := secp256k1.GeneratePrivateKey()
+			require.NoError(t, err)
+			pubKeys[i] = privKey.PubKey()
+		}
+
+		closure := &tree.MultisigClosure{
+			PubKeys: pubKeys,
+		}
+
+		// Generate script
+		script, err := closure.Script()
+		require.NoError(t, err)
+
+		// Test decoding
+		decodedClosure := &tree.MultisigClosure{}
+		valid, err := decodedClosure.Decode(script)
+		require.NoError(t, err)
+		require.True(t, valid)
+		require.Equal(t, 12, len(decodedClosure.PubKeys))
+
+		// Compare all serialized pubkeys
+		for i := 0; i < 12; i++ {
+			require.Equal(t,
+				schnorr.SerializePubKey(pubKeys[i]),
+				schnorr.SerializePubKey(decodedClosure.PubKeys[i]),
+			)
+		}
+
+		// Verify witness size is correct for 12 signatures
+		require.Equal(t, 64*12, closure.WitnessSize())
+	})
+}
+
+func TestCSVSigClosure(t *testing.T) {
+	// Generate test keys
+	privKey1, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+	pubKey1 := privKey1.PubKey()
+
+	privKey2, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+	pubKey2 := privKey2.PubKey()
+
+	t.Run("valid single key CSV", func(t *testing.T) {
+		csvSig := &tree.CSVSigClosure{
+			MultisigClosure: tree.MultisigClosure{
+				PubKeys: []*secp256k1.PublicKey{pubKey1},
+			},
+			Seconds: 1024,
+		}
+
+		script, err := csvSig.Script()
+		require.NoError(t, err)
+
+		decodedCSV := &tree.CSVSigClosure{}
+		valid, err := decodedCSV.Decode(script)
+		require.NoError(t, err)
+		require.True(t, valid)
+		require.Equal(t, uint32(1024), uint32(decodedCSV.Seconds))
+		require.Equal(t, 1, len(decodedCSV.PubKeys))
+		require.Equal(t,
+			schnorr.SerializePubKey(pubKey1),
+			schnorr.SerializePubKey(decodedCSV.PubKeys[0]),
+		)
+	})
+
+	t.Run("valid 2-of-2 CSV", func(t *testing.T) {
+		csvSig := &tree.CSVSigClosure{
+			MultisigClosure: tree.MultisigClosure{
+				PubKeys: []*secp256k1.PublicKey{pubKey1, pubKey2},
+			},
+			Seconds: 2016, // ~2 weeks
+		}
+
+		script, err := csvSig.Script()
+		require.NoError(t, err)
+
+		decodedCSV := &tree.CSVSigClosure{}
+		valid, err := decodedCSV.Decode(script)
+		require.NoError(t, err)
+		require.True(t, valid)
+		require.Equal(t, uint32(2016), uint32(decodedCSV.Seconds))
+		require.Equal(t, 2, len(decodedCSV.PubKeys))
+		require.Equal(t,
+			schnorr.SerializePubKey(pubKey1),
+			schnorr.SerializePubKey(decodedCSV.PubKeys[0]),
+		)
+		require.Equal(t,
+			schnorr.SerializePubKey(pubKey2),
+			schnorr.SerializePubKey(decodedCSV.PubKeys[1]),
+		)
+	})
+
+	t.Run("invalid empty script", func(t *testing.T) {
+		csvSig := &tree.CSVSigClosure{}
+		valid, err := csvSig.Decode([]byte{})
+		require.Error(t, err)
+		require.False(t, valid)
+	})
+
+	t.Run("invalid CSV value", func(t *testing.T) {
+		// Create a script with invalid CSV value
+		pubKeyBytes := schnorr.SerializePubKey(pubKey1)
+		script := []byte{txscript.OP_DATA_32}
+		script = append(script, pubKeyBytes...)
+		script = append(script, txscript.OP_CHECKSIG)
+		script = append(script, 0xFF) // Invalid CSV value
+
+		csvSig := &tree.CSVSigClosure{}
+		valid, err := csvSig.Decode(script)
+		require.NoError(t, err)
+		require.False(t, valid)
+	})
+
+	t.Run("witness size", func(t *testing.T) {
+		csvSig := &tree.CSVSigClosure{
+			MultisigClosure: tree.MultisigClosure{
+				PubKeys: []*secp256k1.PublicKey{pubKey1, pubKey2},
+			},
+			Seconds: 1024,
+		}
+		// Should be same as multisig witness size (64 bytes per signature)
+		require.Equal(t, 128, csvSig.WitnessSize())
+	})
+
+	t.Run("max timelock", func(t *testing.T) {
+		csvSig := &tree.CSVSigClosure{
+			MultisigClosure: tree.MultisigClosure{
+				PubKeys: []*secp256k1.PublicKey{pubKey1},
+			},
+			Seconds: 65535, // Maximum allowed value
+		}
+
+		script, err := csvSig.Script()
+		require.NoError(t, err)
+
+		decodedCSV := &tree.CSVSigClosure{}
+		valid, err := decodedCSV.Decode(script)
+		require.NoError(t, err)
+		require.True(t, valid)
+		require.Equal(t, uint32(65535), uint32(decodedCSV.Seconds))
+	})
+}
+
+func TestMultisigClosureWitness(t *testing.T) {
+	// Generate test keys
+	priv1, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+	pub1 := priv1.PubKey()
+
+	priv2, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+	pub2 := priv2.PubKey()
+
+	// Mock control block
+	controlBlock := []byte("control block")
+
+	testCases := []struct {
+		name        string
+		closure     *tree.MultisigClosure
+		signatures  map[string][]byte
+		expectError bool
+	}{
+		{
+			name: "single signature success",
+			closure: &tree.MultisigClosure{
+				PubKeys: []*secp256k1.PublicKey{pub1},
+			},
+			signatures: map[string][]byte{
+				hex.EncodeToString(schnorr.SerializePubKey(pub1)): []byte("signature1"),
+			},
+			expectError: false,
+		},
+		{
+			name: "multiple signatures success",
+			closure: &tree.MultisigClosure{
+				PubKeys: []*secp256k1.PublicKey{pub1, pub2},
+			},
+			signatures: map[string][]byte{
+				hex.EncodeToString(schnorr.SerializePubKey(pub1)): []byte("signature1"),
+				hex.EncodeToString(schnorr.SerializePubKey(pub2)): []byte("signature2"),
+			},
+			expectError: false,
+		},
+		{
+			name: "missing signature",
+			closure: &tree.MultisigClosure{
+				PubKeys: []*secp256k1.PublicKey{pub1, pub2},
+			},
+			signatures: map[string][]byte{
+				hex.EncodeToString(schnorr.SerializePubKey(pub1)): []byte("signature1"),
+			},
+			expectError: true,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			witness, err := tc.closure.Witness(controlBlock, tc.signatures)
+			if tc.expectError {
+				require.Error(t, err)
+				return
+			}
+
+			require.NoError(t, err)
+
+			// Total witness stack should be: signatures + script + control block
+			expectedLen := len(tc.closure.PubKeys) + 2
+			require.Equal(t, expectedLen, len(witness))
+
+			// Verify signatures are in correct order (reverse order of pubkeys)
+			for i := len(tc.closure.PubKeys) - 1; i >= 0; i-- {
+				expectedSig := tc.signatures[hex.EncodeToString(schnorr.SerializePubKey(tc.closure.PubKeys[i]))]
+				witnessIndex := len(witness) - 3 - i
+				require.Equal(t, expectedSig, witness[:len(witness)-2][witnessIndex])
+			}
+
+			// Verify script is present
+			script, err := tc.closure.Script()
+			require.NoError(t, err)
+			require.Equal(t, script, witness[len(witness)-2])
+
+			// Verify control block is last
+			require.Equal(t, controlBlock, witness[len(witness)-1])
+		})
+	}
+}
+
+func TestUnrollClosureWitness(t *testing.T) {
+	closure := &tree.UnrollClosure{
+		LeftKey:     secp256k1.NewPublicKey(new(secp256k1.FieldVal), new(secp256k1.FieldVal)),
+		RightKey:    secp256k1.NewPublicKey(new(secp256k1.FieldVal), new(secp256k1.FieldVal)),
+		LeftAmount:  1000,
+		RightAmount: 2000,
+	}
+
+	controlBlock := []byte("control block")
+	witness, err := closure.Witness(controlBlock, nil)
+	require.NoError(t, err)
+
+	// Should contain script and control block
+	require.Equal(t, 2, len(witness))
+
+	// Verify script is first
+	script, err := closure.Script()
+	require.NoError(t, err)
+	require.Equal(t, script, witness[0])
+
+	// Verify control block is last
+	require.Equal(t, controlBlock, witness[1])
+}
+
+func TestCSVSigClosureWitness(t *testing.T) {
+	// Generate test keys
+	priv1, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+	pub1 := priv1.PubKey()
+
+	// Create test signature
+	testSig := []byte("signature1")
+	signatures := map[string][]byte{
+		hex.EncodeToString(schnorr.SerializePubKey(pub1)): testSig,
+	}
+
+	controlBlock := []byte("control block")
+
+	closure := &tree.CSVSigClosure{
+		MultisigClosure: tree.MultisigClosure{
+			PubKeys: []*secp256k1.PublicKey{pub1},
+		},
+		Seconds: 144,
+	}
+
+	witness, err := closure.Witness(controlBlock, signatures)
+	require.NoError(t, err)
+
+	// Should contain: signature + script + control block
+	require.Equal(t, 3, len(witness))
+	require.Equal(t, testSig, witness[0])
+
+	script, err := closure.Script()
+	require.NoError(t, err)
+	require.Equal(t, script, witness[1])
+	require.Equal(t, controlBlock, witness[2])
+
+	// Test missing signature
+	_, err = closure.Witness(controlBlock, nil)
+	require.Error(t, err)
+}
+
+func TestDecodeChecksigAdd(t *testing.T) {
+	// Generate some test public keys
+	pubKey1, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+	pubKey2, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+	pubKey3, err := secp256k1.GeneratePrivateKey()
+	require.NoError(t, err)
+
+	pubKeys := []*secp256k1.PublicKey{pubKey1.PubKey(), pubKey2.PubKey(), pubKey3.PubKey()}
+
+	// Create a script for 3-of-3 multisig using CHECKSIGADD
+	scriptBuilder := txscript.NewScriptBuilder().
+		AddData(schnorr.SerializePubKey(pubKeys[0])).
+		AddOp(txscript.OP_CHECKSIG).
+		AddData(schnorr.SerializePubKey(pubKeys[1])).
+		AddOp(txscript.OP_CHECKSIGADD).
+		AddData(schnorr.SerializePubKey(pubKeys[2])).
+		AddOp(txscript.OP_CHECKSIGADD).
+		AddInt64(3).
+		AddOp(txscript.OP_EQUAL)
+
+	script, err := scriptBuilder.Script()
+	require.NoError(t, err, "failed to build script")
+
+	// Decode the script
+	multisigClosure := &tree.MultisigClosure{}
+	valid, err := multisigClosure.Decode(script)
+	require.NoError(t, err, "failed to decode script")
+	require.True(t, valid, "script should be valid")
+	require.Equal(t, tree.MultisigTypeChecksigAdd, multisigClosure.Type, "expected MultisigTypeChecksigAdd")
+	require.Equal(t, 3, len(multisigClosure.PubKeys), "expected 3 public keys")
+}
diff --git a/common/tree/validation.go b/common/tree/validation.go
index 975814c..affc6c2 100644
--- a/common/tree/validation.go
+++ b/common/tree/validation.go
@@ -238,8 +238,8 @@ func validateNodeTransaction(
 
 			switch c := closure.(type) {
 			case *CSVSigClosure:
-				isASP := bytes.Equal(
-					schnorr.SerializePubKey(c.Pubkey),
+				isASP := len(c.MultisigClosure.PubKeys) == 1 && bytes.Equal(
+					schnorr.SerializePubKey(c.MultisigClosure.PubKeys[0]),
 					schnorr.SerializePubKey(expectedPublicKeyASP),
 				)
 				isSweepDelay := int64(c.Seconds) == expectedSequence
diff --git a/common/tree/vtxo.go b/common/tree/vtxo.go
index b552f0d..a6b8d74 100644
--- a/common/tree/vtxo.go
+++ b/common/tree/vtxo.go
@@ -1,89 +1,159 @@
 package tree
 
 import (
+	"bytes"
 	"encoding/hex"
 	"fmt"
+	"math"
 
 	"github.com/ark-network/ark/common"
-	"github.com/ark-network/ark/common/descriptor"
 	"github.com/btcsuite/btcd/btcec/v2/schnorr"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/decred/dcrd/dcrec/secp256k1/v4"
 	"github.com/vulpemventures/go-elements/taproot"
 )
 
-type VtxoScript common.VtxoScript[elementsTapTree]
+var (
+	ErrNoExitLeaf = fmt.Errorf("no exit leaf")
+)
 
-func ParseVtxoScript(desc string) (VtxoScript, error) {
-	v := &DefaultVtxoScript{}
-	// TODO add other type
-	err := v.FromDescriptor(desc)
+type VtxoScript common.VtxoScript[elementsTapTree, *MultisigClosure, *CSVSigClosure]
+
+func ParseVtxoScript(scripts []string) (VtxoScript, error) {
+	v := &TapscriptsVtxoScript{}
+
+	err := v.Decode(scripts)
 	return v, err
 }
 
-/*
-* DefaultVtxoScript is the default implementation of VTXO with 2 closures
-* - Owner and ASP (forfeit)
-*	- Owner after t (unilateral exit)
- */
-type DefaultVtxoScript struct {
-	Owner     *secp256k1.PublicKey
-	Asp       *secp256k1.PublicKey
-	ExitDelay uint
-}
-
-func (v *DefaultVtxoScript) ToDescriptor() string {
-	owner := hex.EncodeToString(schnorr.SerializePubKey(v.Owner))
-
-	return fmt.Sprintf(
-		descriptor.DefaultVtxoDescriptorTemplate,
-		hex.EncodeToString(UnspendableKey().SerializeCompressed()),
-		owner,
-		hex.EncodeToString(schnorr.SerializePubKey(v.Asp)),
-		v.ExitDelay,
-		owner,
-	)
-}
-
-func (v *DefaultVtxoScript) FromDescriptor(desc string) error {
-	owner, asp, exitDelay, err := descriptor.ParseDefaultVtxoDescriptor(desc)
-	if err != nil {
-		return err
+func NewDefaultVtxoScript(owner, asp *secp256k1.PublicKey, exitDelay uint) *TapscriptsVtxoScript {
+	return &TapscriptsVtxoScript{
+		[]Closure{
+			&CSVSigClosure{
+				MultisigClosure: MultisigClosure{PubKeys: []*secp256k1.PublicKey{owner}},
+				Seconds:         exitDelay,
+			},
+			&MultisigClosure{PubKeys: []*secp256k1.PublicKey{owner, asp}},
+		},
 	}
+}
 
-	v.Owner = owner
-	v.Asp = asp
-	v.ExitDelay = exitDelay
+// TapscriptsVtxoScript represents a taproot script that contains a list of tapscript leaves
+// the key-path is always unspendable
+type TapscriptsVtxoScript struct {
+	Closures []Closure
+}
+
+func (v *TapscriptsVtxoScript) Encode() ([]string, error) {
+	encoded := make([]string, 0)
+	for _, closure := range v.Closures {
+		script, err := closure.Script()
+		if err != nil {
+			return nil, err
+		}
+		encoded = append(encoded, hex.EncodeToString(script))
+	}
+	return encoded, nil
+}
+
+func (v *TapscriptsVtxoScript) Decode(scripts []string) error {
+	v.Closures = make([]Closure, 0, len(scripts))
+	for _, script := range scripts {
+		scriptBytes, err := hex.DecodeString(script)
+		if err != nil {
+			return err
+		}
+
+		closure, err := DecodeClosure(scriptBytes)
+		if err != nil {
+			return err
+		}
+		v.Closures = append(v.Closures, closure)
+	}
 	return nil
 }
 
-func (v *DefaultVtxoScript) TapTree() (*secp256k1.PublicKey, elementsTapTree, error) {
-	redeemClosure := &CSVSigClosure{
-		Pubkey:  v.Owner,
-		Seconds: v.ExitDelay,
+func (v *TapscriptsVtxoScript) Validate(asp *secp256k1.PublicKey, minExitDelay uint) error {
+	aspXonly := schnorr.SerializePubKey(asp)
+	for _, forfeit := range v.ForfeitClosures() {
+		// must contain asp pubkey
+		found := false
+		for _, pubkey := range forfeit.PubKeys {
+			if bytes.Equal(schnorr.SerializePubKey(pubkey), aspXonly) {
+				found = true
+				break
+			}
+		}
+		if !found {
+			return fmt.Errorf("invalid forfeit closure, ASP pubkey not found")
+		}
 	}
 
-	redeemLeaf, err := redeemClosure.Leaf()
+	smallestExit, err := v.SmallestExitDelay()
 	if err != nil {
-		return nil, elementsTapTree{}, err
+		if err == ErrNoExitLeaf {
+			return nil
+		}
+		return err
 	}
 
-	forfeitClosure := &MultisigClosure{
-		Pubkey:    v.Owner,
-		AspPubkey: v.Asp,
+	if smallestExit < minExitDelay {
+		return fmt.Errorf("exit delay is too short")
 	}
 
-	forfeitLeaf, err := forfeitClosure.Leaf()
-	if err != nil {
-		return nil, elementsTapTree{}, err
+	return nil
+}
+
+func (v *TapscriptsVtxoScript) SmallestExitDelay() (uint, error) {
+	smallest := uint(math.MaxUint32)
+
+	for _, closure := range v.Closures {
+		if csvClosure, ok := closure.(*CSVSigClosure); ok {
+			if csvClosure.Seconds < smallest {
+				smallest = csvClosure.Seconds
+			}
+		}
 	}
 
-	tapTree := taproot.AssembleTaprootScriptTree(
-		*redeemLeaf, *forfeitLeaf,
-	)
+	if smallest == math.MaxUint32 {
+		return 0, ErrNoExitLeaf
+	}
 
+	return smallest, nil
+}
+
+func (v *TapscriptsVtxoScript) ForfeitClosures() []*MultisigClosure {
+	forfeits := make([]*MultisigClosure, 0)
+	for _, closure := range v.Closures {
+		if multisigClosure, ok := closure.(*MultisigClosure); ok {
+			forfeits = append(forfeits, multisigClosure)
+		}
+	}
+	return forfeits
+}
+
+func (v *TapscriptsVtxoScript) ExitClosures() []*CSVSigClosure {
+	exits := make([]*CSVSigClosure, 0)
+	for _, closure := range v.Closures {
+		if csvClosure, ok := closure.(*CSVSigClosure); ok {
+			exits = append(exits, csvClosure)
+		}
+	}
+	return exits
+}
+
+func (v *TapscriptsVtxoScript) TapTree() (*secp256k1.PublicKey, elementsTapTree, error) {
+	leaves := make([]taproot.TapElementsLeaf, 0, len(v.Closures))
+	for _, closure := range v.Closures {
+		leaf, err := closure.Script()
+		if err != nil {
+			return nil, elementsTapTree{}, err
+		}
+		leaves = append(leaves, taproot.NewBaseTapElementsLeaf(leaf))
+	}
+
+	tapTree := taproot.AssembleTaprootScriptTree(leaves...)
 	root := tapTree.RootNode.TapHash()
-
 	taprootKey := taproot.ComputeTaprootOutputKey(UnspendableKey(), root[:])
 
 	return taprootKey, elementsTapTree{tapTree}, nil
@@ -111,9 +181,15 @@ func (b elementsTapTree) GetTaprootMerkleProof(leafhash chainhash.Hash) (*common
 		return nil, err
 	}
 
+	closure, err := DecodeClosure(proof.Script)
+	if err != nil {
+		return nil, err
+	}
+
 	return &common.TaprootMerkleProof{
 		ControlBlock: controlBlockBytes,
 		Script:       proof.Script,
+		WitnessSize:  closure.WitnessSize(),
 	}, nil
 }
 
diff --git a/common/vtxo.go b/common/vtxo.go
index aa41420..c961224 100644
--- a/common/vtxo.go
+++ b/common/vtxo.go
@@ -14,6 +14,7 @@ var (
 type TaprootMerkleProof struct {
 	ControlBlock []byte
 	Script       []byte
+	WitnessSize  int
 }
 
 // TaprootTree is an interface wrapping the methods needed to spend a vtxo taproot contract
@@ -30,14 +31,15 @@ It may also contain others closures implementing specific use cases.
 
 VtxoScript abstracts the taproot complexity behind vtxo contracts.
 it is compiled, transferred and parsed using descriptor string.
-
-default vtxo script = tr(_,{ and(pk(USER), pk(ASP)), and(older(T), pk(USER)) })
-reversible vtxo script = tr(_,{ { and(pk(SENDER), pk(ASP)), and(older(T), pk(SENDER)) }, { and(pk(RECEIVER), pk(ASP) } })
 */
-type VtxoScript[T TaprootTree] interface {
+type VtxoScript[T TaprootTree, F interface{}, E interface{}] interface {
+	Validate(server *secp256k1.PublicKey, minExitDelay uint) error
 	TapTree() (taprootKey *secp256k1.PublicKey, taprootScriptTree T, err error)
-	ToDescriptor() string
-	FromDescriptor(descriptor string) error
+	Encode() ([]string, error)
+	Decode(scripts []string) error
+	SmallestExitDelay() (uint, error)
+	ForfeitClosures() []F
+	ExitClosures() []E
 }
 
 // BiggestLeafMerkleProof returns the leaf with the biggest witness size (for fee estimation)
diff --git a/pkg/client-sdk/client/client.go b/pkg/client-sdk/client/client.go
index 86b3996..c8e2273 100644
--- a/pkg/client-sdk/client/client.go
+++ b/pkg/client-sdk/client/client.go
@@ -89,7 +89,7 @@ func (o Outpoint) Equals(other Outpoint) bool {
 
 type Input struct {
 	Outpoint
-	Descriptor string
+	Tapscripts []string
 }
 
 type AsyncPaymentInput struct {
@@ -129,9 +129,9 @@ func (v Vtxo) Address(asp *secp256k1.PublicKey, net common.Network) (string, err
 	return a.Encode()
 }
 
-type DescriptorVtxo struct {
+type TapscriptsVtxo struct {
 	Vtxo
-	Descriptor string
+	Tapscripts []string
 }
 
 type Output struct {
diff --git a/pkg/client-sdk/client/grpc/types.go b/pkg/client-sdk/client/grpc/types.go
index cd9f8f7..5dc7073 100644
--- a/pkg/client-sdk/client/grpc/types.go
+++ b/pkg/client-sdk/client/grpc/types.go
@@ -144,7 +144,11 @@ func toProtoInput(i client.Input) *arkv1.Input {
 			Txid: i.Txid,
 			Vout: i.VOut,
 		},
-		Descriptor_: i.Descriptor,
+		TaprootTree: &arkv1.Input_Tapscripts{
+			Tapscripts: &arkv1.Tapscripts{
+				Scripts: i.Tapscripts,
+			},
+		},
 	}
 }
 
diff --git a/pkg/client-sdk/client/rest/client.go b/pkg/client-sdk/client/rest/client.go
index a934d4c..8592c61 100644
--- a/pkg/client-sdk/client/rest/client.go
+++ b/pkg/client-sdk/client/rest/client.go
@@ -118,7 +118,9 @@ func (a *restClient) RegisterInputsForNextRound(
 				Txid: i.Txid,
 				Vout: int64(i.VOut),
 			},
-			Descriptor: i.Descriptor,
+			Tapscripts: &models.V1Tapscripts{
+				Scripts: i.Tapscripts,
+			},
 		})
 	}
 	body := &models.V1RegisterInputsForNextRoundRequest{
@@ -402,7 +404,9 @@ func (a *restClient) CreatePayment(
 					Txid: i.Input.Txid,
 					Vout: int64(i.VOut),
 				},
-				Descriptor: i.Input.Descriptor,
+				Tapscripts: &models.V1Tapscripts{
+					Scripts: i.Input.Tapscripts,
+				},
 			},
 			ForfeitLeafHash: i.ForfeitLeafHash.String(),
 		})
diff --git a/pkg/client-sdk/client/rest/service/models/v1_get_boarding_address_response.go b/pkg/client-sdk/client/rest/service/models/v1_get_boarding_address_response.go
index 85152f8..df31276 100644
--- a/pkg/client-sdk/client/rest/service/models/v1_get_boarding_address_response.go
+++ b/pkg/client-sdk/client/rest/service/models/v1_get_boarding_address_response.go
@@ -8,6 +8,7 @@ package models
 import (
 	"context"
 
+	"github.com/go-openapi/errors"
 	"github.com/go-openapi/strfmt"
 	"github.com/go-openapi/swag"
 )
@@ -22,15 +23,76 @@ type V1GetBoardingAddressResponse struct {
 
 	// descriptor
 	Descriptor string `json:"descriptor,omitempty"`
+
+	// tapscripts
+	Tapscripts *V1Tapscripts `json:"tapscripts,omitempty"`
 }
 
 // Validate validates this v1 get boarding address response
 func (m *V1GetBoardingAddressResponse) Validate(formats strfmt.Registry) error {
+	var res []error
+
+	if err := m.validateTapscripts(formats); err != nil {
+		res = append(res, err)
+	}
+
+	if len(res) > 0 {
+		return errors.CompositeValidationError(res...)
+	}
 	return nil
 }
 
-// ContextValidate validates this v1 get boarding address response based on context it is used
+func (m *V1GetBoardingAddressResponse) validateTapscripts(formats strfmt.Registry) error {
+	if swag.IsZero(m.Tapscripts) { // not required
+		return nil
+	}
+
+	if m.Tapscripts != nil {
+		if err := m.Tapscripts.Validate(formats); err != nil {
+			if ve, ok := err.(*errors.Validation); ok {
+				return ve.ValidateName("tapscripts")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("tapscripts")
+			}
+			return err
+		}
+	}
+
+	return nil
+}
+
+// ContextValidate validate this v1 get boarding address response based on the context it is used
 func (m *V1GetBoardingAddressResponse) ContextValidate(ctx context.Context, formats strfmt.Registry) error {
+	var res []error
+
+	if err := m.contextValidateTapscripts(ctx, formats); err != nil {
+		res = append(res, err)
+	}
+
+	if len(res) > 0 {
+		return errors.CompositeValidationError(res...)
+	}
+	return nil
+}
+
+func (m *V1GetBoardingAddressResponse) contextValidateTapscripts(ctx context.Context, formats strfmt.Registry) error {
+
+	if m.Tapscripts != nil {
+
+		if swag.IsZero(m.Tapscripts) { // not required
+			return nil
+		}
+
+		if err := m.Tapscripts.ContextValidate(ctx, formats); err != nil {
+			if ve, ok := err.(*errors.Validation); ok {
+				return ve.ValidateName("tapscripts")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("tapscripts")
+			}
+			return err
+		}
+	}
+
 	return nil
 }
 
diff --git a/pkg/client-sdk/client/rest/service/models/v1_input.go b/pkg/client-sdk/client/rest/service/models/v1_input.go
index d2e9647..cb02f96 100644
--- a/pkg/client-sdk/client/rest/service/models/v1_input.go
+++ b/pkg/client-sdk/client/rest/service/models/v1_input.go
@@ -23,6 +23,9 @@ type V1Input struct {
 
 	// outpoint
 	Outpoint *V1Outpoint `json:"outpoint,omitempty"`
+
+	// tapscripts
+	Tapscripts *V1Tapscripts `json:"tapscripts,omitempty"`
 }
 
 // Validate validates this v1 input
@@ -33,6 +36,10 @@ func (m *V1Input) Validate(formats strfmt.Registry) error {
 		res = append(res, err)
 	}
 
+	if err := m.validateTapscripts(formats); err != nil {
+		res = append(res, err)
+	}
+
 	if len(res) > 0 {
 		return errors.CompositeValidationError(res...)
 	}
@@ -58,6 +65,25 @@ func (m *V1Input) validateOutpoint(formats strfmt.Registry) error {
 	return nil
 }
 
+func (m *V1Input) validateTapscripts(formats strfmt.Registry) error {
+	if swag.IsZero(m.Tapscripts) { // not required
+		return nil
+	}
+
+	if m.Tapscripts != nil {
+		if err := m.Tapscripts.Validate(formats); err != nil {
+			if ve, ok := err.(*errors.Validation); ok {
+				return ve.ValidateName("tapscripts")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("tapscripts")
+			}
+			return err
+		}
+	}
+
+	return nil
+}
+
 // ContextValidate validate this v1 input based on the context it is used
 func (m *V1Input) ContextValidate(ctx context.Context, formats strfmt.Registry) error {
 	var res []error
@@ -66,6 +92,10 @@ func (m *V1Input) ContextValidate(ctx context.Context, formats strfmt.Registry)
 		res = append(res, err)
 	}
 
+	if err := m.contextValidateTapscripts(ctx, formats); err != nil {
+		res = append(res, err)
+	}
+
 	if len(res) > 0 {
 		return errors.CompositeValidationError(res...)
 	}
@@ -93,6 +123,27 @@ func (m *V1Input) contextValidateOutpoint(ctx context.Context, formats strfmt.Re
 	return nil
 }
 
+func (m *V1Input) contextValidateTapscripts(ctx context.Context, formats strfmt.Registry) error {
+
+	if m.Tapscripts != nil {
+
+		if swag.IsZero(m.Tapscripts) { // not required
+			return nil
+		}
+
+		if err := m.Tapscripts.ContextValidate(ctx, formats); err != nil {
+			if ve, ok := err.(*errors.Validation); ok {
+				return ve.ValidateName("tapscripts")
+			} else if ce, ok := err.(*errors.CompositeError); ok {
+				return ce.ValidateName("tapscripts")
+			}
+			return err
+		}
+	}
+
+	return nil
+}
+
 // MarshalBinary interface implementation
 func (m *V1Input) MarshalBinary() ([]byte, error) {
 	if m == nil {
diff --git a/pkg/client-sdk/client/rest/service/models/v1_ownership_proof.go b/pkg/client-sdk/client/rest/service/models/v1_ownership_proof.go
index f2301c3..c5cd3da 100644
--- a/pkg/client-sdk/client/rest/service/models/v1_ownership_proof.go
+++ b/pkg/client-sdk/client/rest/service/models/v1_ownership_proof.go
@@ -12,7 +12,7 @@ import (
 	"github.com/go-openapi/swag"
 )
 
-// V1OwnershipProof This message is used to prove to the ASP that the user controls the vtxo without revealing the whole VTXO descriptor.
+// V1OwnershipProof This message is used to prove to the ASP that the user controls the vtxo without revealing the whole VTXO taproot tree.
 //
 // swagger:model v1OwnershipProof
 type V1OwnershipProof struct {
diff --git a/pkg/client-sdk/client/rest/service/models/v1_tapscripts.go b/pkg/client-sdk/client/rest/service/models/v1_tapscripts.go
new file mode 100644
index 0000000..ededc5a
--- /dev/null
+++ b/pkg/client-sdk/client/rest/service/models/v1_tapscripts.go
@@ -0,0 +1,50 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+package models
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the swagger generate command
+
+import (
+	"context"
+
+	"github.com/go-openapi/strfmt"
+	"github.com/go-openapi/swag"
+)
+
+// V1Tapscripts v1 tapscripts
+//
+// swagger:model v1Tapscripts
+type V1Tapscripts struct {
+
+	// scripts
+	Scripts []string `json:"scripts"`
+}
+
+// Validate validates this v1 tapscripts
+func (m *V1Tapscripts) Validate(formats strfmt.Registry) error {
+	return nil
+}
+
+// ContextValidate validates this v1 tapscripts based on context it is used
+func (m *V1Tapscripts) ContextValidate(ctx context.Context, formats strfmt.Registry) error {
+	return nil
+}
+
+// MarshalBinary interface implementation
+func (m *V1Tapscripts) MarshalBinary() ([]byte, error) {
+	if m == nil {
+		return nil, nil
+	}
+	return swag.WriteJSON(m)
+}
+
+// UnmarshalBinary interface implementation
+func (m *V1Tapscripts) UnmarshalBinary(b []byte) error {
+	var res V1Tapscripts
+	if err := swag.ReadJSON(b, &res); err != nil {
+		return err
+	}
+	*m = res
+	return nil
+}
diff --git a/pkg/client-sdk/covenant_client.go b/pkg/client-sdk/covenant_client.go
index 58f25fa..e27c382 100644
--- a/pkg/client-sdk/covenant_client.go
+++ b/pkg/client-sdk/covenant_client.go
@@ -22,7 +22,6 @@ import (
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcwallet/waddrmgr"
-	"github.com/decred/dcrd/dcrec/secp256k1/v4"
 	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
 	log "github.com/sirupsen/logrus"
 	"github.com/vulpemventures/go-elements/address"
@@ -518,7 +517,7 @@ func (a *covenantArkClient) CollaborativeRedeem(
 		},
 	}
 
-	vtxos := make([]client.DescriptorVtxo, 0)
+	vtxos := make([]client.TapscriptsVtxo, 0)
 	spendableVtxos, err := a.getVtxos(ctx, false, nil)
 	if err != nil {
 		return "", err
@@ -532,9 +531,9 @@ func (a *covenantArkClient) CollaborativeRedeem(
 			}
 
 			if vtxoAddr == offchainAddr.Address {
-				vtxos = append(vtxos, client.DescriptorVtxo{
+				vtxos = append(vtxos, client.TapscriptsVtxo{
 					Vtxo:       v,
-					Descriptor: offchainAddr.Descriptor,
+					Tapscripts: offchainAddr.Tapscripts,
 				})
 			}
 		}
@@ -572,7 +571,7 @@ func (a *covenantArkClient) CollaborativeRedeem(
 				Txid: coin.Txid,
 				VOut: coin.VOut,
 			},
-			Descriptor: coin.Descriptor,
+			Tapscripts: coin.Tapscripts,
 		})
 	}
 	for _, coin := range selectedBoardingUtxos {
@@ -581,7 +580,7 @@ func (a *covenantArkClient) CollaborativeRedeem(
 				Txid: coin.Txid,
 				VOut: coin.VOut,
 			},
-			Descriptor: coin.Descriptor,
+			Tapscripts: coin.Tapscripts,
 		})
 	}
 
@@ -661,7 +660,7 @@ func (a *covenantArkClient) getAllBoardingUtxos(ctx context.Context) ([]types.Ut
 						VOut:       uint32(i),
 						Amount:     vout.Amount,
 						CreatedAt:  createdAt,
-						Descriptor: addr.Descriptor,
+						Tapscripts: addr.Tapscripts,
 					})
 				}
 			}
@@ -680,17 +679,14 @@ func (a *covenantArkClient) getClaimableBoardingUtxos(ctx context.Context, opts
 	claimable := make([]types.Utxo, 0)
 
 	for _, addr := range boardingAddrs {
-		boardingScript, err := tree.ParseVtxoScript(addr.Descriptor)
+		boardingScript, err := tree.ParseVtxoScript(addr.Tapscripts)
 		if err != nil {
 			return nil, err
 		}
 
-		var boardingTimeout uint
-
-		if defaultVtxo, ok := boardingScript.(*tree.DefaultVtxoScript); ok {
-			boardingTimeout = defaultVtxo.ExitDelay
-		} else {
-			return nil, fmt.Errorf("unsupported boarding descriptor: %s", addr.Descriptor)
+		boardingTimeout, err := boardingScript.SmallestExitDelay()
+		if err != nil {
+			return nil, err
 		}
 
 		boardingUtxos, err := a.explorer.GetUtxos(addr.Address)
@@ -719,7 +715,7 @@ func (a *covenantArkClient) getClaimableBoardingUtxos(ctx context.Context, opts
 				}
 			}
 
-			u := utxo.ToUtxo(boardingTimeout, addr.Descriptor)
+			u := utxo.ToUtxo(boardingTimeout, addr.Tapscripts)
 			if u.SpendableAt.Before(now) {
 				continue
 			}
@@ -929,7 +925,7 @@ func (a *covenantArkClient) sendOffchain(
 		return "", fmt.Errorf("no offchain addresses found")
 	}
 
-	vtxos := make([]client.DescriptorVtxo, 0)
+	vtxos := make([]client.TapscriptsVtxo, 0)
 
 	spendableVtxos, err := a.getVtxos(ctx, withExpiryCoinselect, nil)
 	if err != nil {
@@ -944,9 +940,9 @@ func (a *covenantArkClient) sendOffchain(
 			}
 
 			if vtxoAddr == offchainAddr.Address {
-				vtxos = append(vtxos, client.DescriptorVtxo{
+				vtxos = append(vtxos, client.TapscriptsVtxo{
 					Vtxo:       v,
-					Descriptor: offchainAddr.Descriptor,
+					Tapscripts: offchainAddr.Tapscripts,
 				})
 			}
 		}
@@ -958,7 +954,7 @@ func (a *covenantArkClient) sendOffchain(
 	}
 
 	var selectedBoardingCoins []types.Utxo
-	var selectedCoins []client.DescriptorVtxo
+	var selectedCoins []client.TapscriptsVtxo
 	var changeAmount uint64
 
 	// if no receivers, self send all selected coins
@@ -1009,7 +1005,7 @@ func (a *covenantArkClient) sendOffchain(
 				Txid: coin.Txid,
 				VOut: coin.VOut,
 			},
-			Descriptor: coin.Descriptor,
+			Tapscripts: coin.Tapscripts,
 		})
 	}
 	for _, coin := range selectedBoardingCoins {
@@ -1018,7 +1014,7 @@ func (a *covenantArkClient) sendOffchain(
 				Txid: coin.Txid,
 				VOut: coin.VOut,
 			},
-			Descriptor: coin.Descriptor,
+			Tapscripts: coin.Tapscripts,
 		})
 	}
 
@@ -1057,19 +1053,33 @@ func (a *covenantArkClient) addInputs(
 		return err
 	}
 
-	vtxoScript, err := tree.ParseVtxoScript(offchain.Descriptor)
+	vtxoScript, err := tree.ParseVtxoScript(offchain.Tapscripts)
 	if err != nil {
 		return err
 	}
 
-	var userPubkey, aspPubkey *secp256k1.PublicKey
+	forfeitClosure := vtxoScript.ForfeitClosures()[0]
 
-	switch s := vtxoScript.(type) {
-	case *tree.DefaultVtxoScript:
-		userPubkey = s.Owner
-		aspPubkey = s.Asp
-	default:
-		return fmt.Errorf("unsupported vtxo script: %T", s)
+	forfeitScript, err := forfeitClosure.Script()
+	if err != nil {
+		return err
+	}
+
+	forfeitLeaf := taproot.NewBaseTapElementsLeaf(forfeitScript)
+
+	_, taprootTree, err := vtxoScript.TapTree()
+	if err != nil {
+		return err
+	}
+
+	leafProof, err := taprootTree.GetTaprootMerkleProof(forfeitLeaf.TapHash())
+	if err != nil {
+		return err
+	}
+
+	controlBlock, err := taproot.ParseControlBlock(leafProof.Script)
+	if err != nil {
+		return err
 	}
 
 	for _, utxo := range utxos {
@@ -1088,37 +1098,6 @@ func (a *covenantArkClient) addInputs(
 			return err
 		}
 
-		vtxoScript := &tree.DefaultVtxoScript{
-			Owner:     userPubkey,
-			Asp:       aspPubkey,
-			ExitDelay: utxo.Delay,
-		}
-
-		forfeitClosure := &tree.MultisigClosure{
-			Pubkey:    userPubkey,
-			AspPubkey: aspPubkey,
-		}
-
-		forfeitLeaf, err := forfeitClosure.Leaf()
-		if err != nil {
-			return err
-		}
-
-		_, taprootTree, err := vtxoScript.TapTree()
-		if err != nil {
-			return err
-		}
-
-		leafProof, err := taprootTree.GetTaprootMerkleProof(forfeitLeaf.TapHash())
-		if err != nil {
-			return err
-		}
-
-		controlBlock, err := taproot.ParseControlBlock(leafProof.Script)
-		if err != nil {
-			return err
-		}
-
 		inputIndex := len(updater.Pset.Inputs) - 1
 
 		if err := updater.AddInTapLeafScript(
@@ -1138,7 +1117,7 @@ func (a *covenantArkClient) addInputs(
 func (a *covenantArkClient) handleRoundStream(
 	ctx context.Context,
 	paymentID string,
-	vtxosToSign []client.DescriptorVtxo,
+	vtxosToSign []client.TapscriptsVtxo,
 	boardingUtxos []types.Utxo,
 	receivers []client.Output,
 ) (string, error) {
@@ -1202,7 +1181,7 @@ func (a *covenantArkClient) handleRoundStream(
 func (a *covenantArkClient) handleRoundFinalization(
 	ctx context.Context,
 	event client.RoundFinalizationEvent,
-	vtxos []client.DescriptorVtxo,
+	vtxos []client.TapscriptsVtxo,
 	boardingUtxos []types.Utxo,
 	receivers []client.Output,
 ) (signedForfeits []string, signedRoundTx string, err error) {
@@ -1233,28 +1212,20 @@ func (a *covenantArkClient) handleRoundFinalization(
 	}
 
 	for _, boardingUtxo := range boardingUtxos {
-		boardingVtxoScript, err := tree.ParseVtxoScript(boardingUtxo.Descriptor)
+		boardingVtxoScript, err := tree.ParseVtxoScript(boardingUtxo.Tapscripts)
 		if err != nil {
 			return nil, "", err
 		}
 
-		var forfeitClosure tree.Closure
+		forfeitClosure := boardingVtxoScript.ForfeitClosures()[0]
 
-		switch s := boardingVtxoScript.(type) {
-		case *tree.DefaultVtxoScript:
-			forfeitClosure = &tree.MultisigClosure{
-				Pubkey:    s.Owner,
-				AspPubkey: a.AspPubkey,
-			}
-		default:
-			return nil, "", fmt.Errorf("unsupported boarding descriptor: %s", boardingUtxo.Descriptor)
-		}
-
-		forfeitLeaf, err := forfeitClosure.Leaf()
+		forfeitScript, err := forfeitClosure.Script()
 		if err != nil {
 			return nil, "", err
 		}
 
+		forfeitLeaf := taproot.NewBaseTapElementsLeaf(forfeitScript)
+
 		_, taprootTree, err := boardingVtxoScript.TapTree()
 		if err != nil {
 			return nil, "", err
@@ -1430,7 +1401,7 @@ func (a *covenantArkClient) validateOffChainReceiver(
 
 func (a *covenantArkClient) createAndSignForfeits(
 	ctx context.Context,
-	vtxosToSign []client.DescriptorVtxo,
+	vtxosToSign []client.TapscriptsVtxo,
 	connectors []string,
 	feeRate chainfee.SatPerKVByte,
 ) ([]string, error) {
@@ -1452,7 +1423,7 @@ func (a *covenantArkClient) createAndSignForfeits(
 	}
 
 	for _, vtxo := range vtxosToSign {
-		vtxoScript, err := tree.ParseVtxoScript(vtxo.Descriptor)
+		vtxoScript, err := tree.ParseVtxoScript(vtxo.Tapscripts)
 		if err != nil {
 			return nil, err
 		}
@@ -1472,25 +1443,15 @@ func (a *covenantArkClient) createAndSignForfeits(
 			TxIndex: vtxo.VOut,
 		}
 
-		var forfeitClosure tree.Closure
-		var witnessSize int
+		forfeitClosure := vtxoScript.ForfeitClosures()[0]
 
-		switch s := vtxoScript.(type) {
-		case *tree.DefaultVtxoScript:
-			forfeitClosure = &tree.MultisigClosure{
-				Pubkey:    s.Owner,
-				AspPubkey: a.AspPubkey,
-			}
-			witnessSize = 64 * 2
-		default:
-			return nil, fmt.Errorf("unsupported vtxo script: %T", s)
-		}
-
-		forfeitLeaf, err := forfeitClosure.Leaf()
+		forfeitScript, err := forfeitClosure.Script()
 		if err != nil {
 			return nil, err
 		}
 
+		forfeitLeaf := taproot.NewBaseTapElementsLeaf(forfeitScript)
+
 		leafProof, err := vtxoTapTree.GetTaprootMerkleProof(forfeitLeaf.TapHash())
 		if err != nil {
 			return nil, err
@@ -1512,7 +1473,7 @@ func (a *covenantArkClient) createAndSignForfeits(
 				RevealedScript: leafProof.Script,
 				ControlBlock:   &ctrlBlock.ControlBlock,
 			},
-			witnessSize,
+			forfeitClosure.WitnessSize(),
 			txscript.WitnessV0PubKeyHashTy,
 		)
 		if err != nil {
@@ -1567,19 +1528,14 @@ func (a *covenantArkClient) coinSelectOnchain(
 
 	fetchedUtxos := make([]types.Utxo, 0)
 	for _, addr := range boardingAddrs {
-		boardingDescriptor := addr.Descriptor
-
-		boardingScript, err := tree.ParseVtxoScript(boardingDescriptor)
+		boardingScript, err := tree.ParseVtxoScript(addr.Tapscripts)
 		if err != nil {
 			return nil, 0, err
 		}
 
-		var boardingTimeout uint
-
-		if defaultVtxo, ok := boardingScript.(*tree.DefaultVtxoScript); ok {
-			boardingTimeout = defaultVtxo.ExitDelay
-		} else {
-			return nil, 0, fmt.Errorf("unsupported boarding descriptor: %s", boardingDescriptor)
+		boardingTimeout, err := boardingScript.SmallestExitDelay()
+		if err != nil {
+			return nil, 0, err
 		}
 
 		utxos, err := a.explorer.GetUtxos(addr.Address)
@@ -1588,7 +1544,7 @@ func (a *covenantArkClient) coinSelectOnchain(
 		}
 
 		for _, utxo := range utxos {
-			u := utxo.ToUtxo(boardingTimeout, addr.Descriptor)
+			u := utxo.ToUtxo(boardingTimeout, addr.Tapscripts)
 			if u.SpendableAt.Before(now) {
 				fetchedUtxos = append(fetchedUtxos, u)
 			}
@@ -1624,7 +1580,7 @@ func (a *covenantArkClient) coinSelectOnchain(
 		}
 
 		for _, utxo := range utxos {
-			u := utxo.ToUtxo(uint(a.UnilateralExitDelay), addr.Descriptor)
+			u := utxo.ToUtxo(uint(a.UnilateralExitDelay), addr.Tapscripts)
 			if u.SpendableAt.Before(now) {
 				fetchedUtxos = append(fetchedUtxos, u)
 			}
diff --git a/pkg/client-sdk/covenantless_client.go b/pkg/client-sdk/covenantless_client.go
index 4b913a5..10a5301 100644
--- a/pkg/client-sdk/covenantless_client.go
+++ b/pkg/client-sdk/covenantless_client.go
@@ -857,7 +857,7 @@ func (a *covenantlessArkClient) CollaborativeRedeem(
 		},
 	}
 
-	vtxos := make([]client.DescriptorVtxo, 0)
+	vtxos := make([]client.TapscriptsVtxo, 0)
 	spendableVtxos, err := a.getVtxos(ctx, nil)
 	if err != nil {
 		return "", err
@@ -871,9 +871,9 @@ func (a *covenantlessArkClient) CollaborativeRedeem(
 			}
 
 			if vtxoAddr == offchainAddr.Address {
-				vtxos = append(vtxos, client.DescriptorVtxo{
+				vtxos = append(vtxos, client.TapscriptsVtxo{
 					Vtxo:       v,
-					Descriptor: offchainAddr.Descriptor,
+					Tapscripts: offchainAddr.Tapscripts,
 				})
 			}
 		}
@@ -911,7 +911,7 @@ func (a *covenantlessArkClient) CollaborativeRedeem(
 				Txid: coin.Txid,
 				VOut: coin.VOut,
 			},
-			Descriptor: coin.Descriptor,
+			Tapscripts: coin.Tapscripts,
 		})
 	}
 	for _, coin := range selectedBoardingCoins {
@@ -920,7 +920,7 @@ func (a *covenantlessArkClient) CollaborativeRedeem(
 				Txid: coin.Txid,
 				VOut: coin.VOut,
 			},
-			Descriptor: coin.Descriptor,
+			Tapscripts: coin.Tapscripts,
 		})
 	}
 
@@ -1004,7 +1004,7 @@ func (a *covenantlessArkClient) SendAsync(
 		sumOfReceivers += receiver.Amount()
 	}
 
-	vtxos := make([]client.DescriptorVtxo, 0)
+	vtxos := make([]client.TapscriptsVtxo, 0)
 	opts := &CoinSelectOptions{
 		WithExpirySorting: withExpiryCoinselect,
 	}
@@ -1021,9 +1021,9 @@ func (a *covenantlessArkClient) SendAsync(
 			}
 
 			if vtxoAddr == offchainAddr.Address {
-				vtxos = append(vtxos, client.DescriptorVtxo{
+				vtxos = append(vtxos, client.TapscriptsVtxo{
 					Vtxo:       v,
-					Descriptor: offchainAddr.Descriptor,
+					Tapscripts: offchainAddr.Tapscripts,
 				})
 			}
 		}
@@ -1048,35 +1048,27 @@ func (a *covenantlessArkClient) SendAsync(
 	inputs := make([]client.AsyncPaymentInput, 0, len(selectedCoins))
 
 	for _, coin := range selectedCoins {
-		vtxoScript, err := bitcointree.ParseVtxoScript(coin.Descriptor)
+		vtxoScript, err := bitcointree.ParseVtxoScript(coin.Tapscripts)
 		if err != nil {
 			return "", err
 		}
 
-		var forfeitClosure bitcointree.Closure
+		forfeitClosure := vtxoScript.ForfeitClosures()[0]
 
-		switch s := vtxoScript.(type) {
-		case *bitcointree.DefaultVtxoScript:
-			forfeitClosure = &bitcointree.MultisigClosure{
-				Pubkey:    s.Owner,
-				AspPubkey: s.Asp,
-			}
-		default:
-			return "", fmt.Errorf("unsupported vtxo script: %T", s)
-		}
-
-		forfeitLeaf, err := forfeitClosure.Leaf()
+		forfeitScript, err := forfeitClosure.Script()
 		if err != nil {
 			return "", err
 		}
 
+		forfeitLeaf := txscript.NewBaseTapLeaf(forfeitScript)
+
 		inputs = append(inputs, client.AsyncPaymentInput{
 			Input: client.Input{
 				Outpoint: client.Outpoint{
 					Txid: coin.Txid,
 					VOut: coin.VOut,
 				},
-				Descriptor: coin.Descriptor,
+				Tapscripts: coin.Tapscripts,
 			},
 			ForfeitLeafHash: forfeitLeaf.TapHash(),
 		})
@@ -1158,7 +1150,7 @@ func (a *covenantlessArkClient) SetNostrNotificationRecipient(ctx context.Contex
 		return err
 	}
 
-	descriptorVtxos := make([]client.DescriptorVtxo, 0)
+	descriptorVtxos := make([]client.TapscriptsVtxo, 0)
 	for _, offchainAddr := range offchainAddrs {
 		for _, vtxo := range spendableVtxos {
 			vtxoAddr, err := vtxo.Address(a.AspPubkey, a.Network)
@@ -1167,9 +1159,9 @@ func (a *covenantlessArkClient) SetNostrNotificationRecipient(ctx context.Contex
 			}
 
 			if vtxoAddr == offchainAddr.Address {
-				descriptorVtxos = append(descriptorVtxos, client.DescriptorVtxo{
+				descriptorVtxos = append(descriptorVtxos, client.TapscriptsVtxo{
 					Vtxo:       vtxo,
-					Descriptor: offchainAddr.Descriptor,
+					Tapscripts: offchainAddr.Tapscripts,
 				})
 			}
 		}
@@ -1187,35 +1179,24 @@ func (a *covenantlessArkClient) SetNostrNotificationRecipient(ctx context.Contex
 		}
 
 		// validate the vtxo script type
-		vtxoScript, err := bitcointree.ParseVtxoScript(v.Descriptor)
+		vtxoScript, err := bitcointree.ParseVtxoScript(v.Tapscripts)
 		if err != nil {
 			return err
 		}
 
-		var forfeitClosure bitcointree.Closure
-		var signingPubkey string
-
-		if defaultVtxoScript, ok := vtxoScript.(*bitcointree.DefaultVtxoScript); ok {
-			forfeitClosure = &bitcointree.MultisigClosure{
-				Pubkey:    defaultVtxoScript.Owner,
-				AspPubkey: defaultVtxoScript.Asp,
-			}
-
-			signingPubkey = hex.EncodeToString(schnorr.SerializePubKey(defaultVtxoScript.Owner))
-		} else {
-			return fmt.Errorf("unsupported vtxo script: %T", vtxoScript)
-		}
+		forfeitClosure := vtxoScript.ForfeitClosures()[0]
 
 		_, tapTree, err := vtxoScript.TapTree()
 		if err != nil {
 			return err
 		}
 
-		forfeitLeaf, err := forfeitClosure.Leaf()
+		forfeitScript, err := forfeitClosure.Script()
 		if err != nil {
 			return err
 		}
 
+		forfeitLeaf := txscript.NewBaseTapLeaf(forfeitScript)
 		merkleProof, err := tapTree.GetTaprootMerkleProof(forfeitLeaf.TapHash())
 		if err != nil {
 			return err
@@ -1236,7 +1217,7 @@ func (a *covenantlessArkClient) SetNostrNotificationRecipient(ctx context.Contex
 		outpointBytes := append(txhash[:], voutBytes...)
 		sigMsg := sha256.Sum256(outpointBytes)
 
-		sig, err := a.wallet.SignMessage(ctx, sigMsg[:], signingPubkey)
+		sig, err := a.wallet.SignMessage(ctx, sigMsg[:])
 		if err != nil {
 			return err
 		}
@@ -1434,7 +1415,7 @@ func (a *covenantlessArkClient) sendOffchain(
 		return "", fmt.Errorf("no offchain addresses found")
 	}
 
-	vtxos := make([]client.DescriptorVtxo, 0)
+	vtxos := make([]client.TapscriptsVtxo, 0)
 	opts := &CoinSelectOptions{
 		WithExpirySorting: withExpiryCoinselect}
 	spendableVtxos, err := a.getVtxos(ctx, opts)
@@ -1450,9 +1431,9 @@ func (a *covenantlessArkClient) sendOffchain(
 			}
 
 			if vtxoAddr == offchainAddr.Address {
-				vtxos = append(vtxos, client.DescriptorVtxo{
+				vtxos = append(vtxos, client.TapscriptsVtxo{
 					Vtxo:       v,
-					Descriptor: offchainAddr.Descriptor,
+					Tapscripts: offchainAddr.Tapscripts,
 				})
 			}
 		}
@@ -1464,7 +1445,7 @@ func (a *covenantlessArkClient) sendOffchain(
 	}
 
 	var selectedBoardingCoins []types.Utxo
-	var selectedCoins []client.DescriptorVtxo
+	var selectedCoins []client.TapscriptsVtxo
 	var changeAmount uint64
 
 	// if no receivers, self send all selected coins
@@ -1513,7 +1494,7 @@ func (a *covenantlessArkClient) sendOffchain(
 				Txid: coin.Txid,
 				VOut: coin.VOut,
 			},
-			Descriptor: coin.Descriptor,
+			Tapscripts: coin.Tapscripts,
 		})
 	}
 	for _, boardingUtxo := range selectedBoardingCoins {
@@ -1522,7 +1503,7 @@ func (a *covenantlessArkClient) sendOffchain(
 				Txid: boardingUtxo.Txid,
 				VOut: boardingUtxo.VOut,
 			},
-			Descriptor: boardingUtxo.Descriptor,
+			Tapscripts: boardingUtxo.Tapscripts,
 		})
 	}
 
@@ -1567,21 +1548,11 @@ func (a *covenantlessArkClient) addInputs(
 		return err
 	}
 
-	vtxoScript, err := tree.ParseVtxoScript(offchain.Descriptor)
+	vtxoScript, err := bitcointree.ParseVtxoScript(offchain.Tapscripts)
 	if err != nil {
 		return err
 	}
 
-	var userPubkey, aspPubkey *secp256k1.PublicKey
-
-	switch s := vtxoScript.(type) {
-	case *tree.DefaultVtxoScript:
-		userPubkey = s.Owner
-		aspPubkey = s.Asp
-	default:
-		return fmt.Errorf("unsupported vtxo script: %T", s)
-	}
-
 	for _, utxo := range utxos {
 		previousHash, err := chainhash.NewHashFromStr(utxo.Txid)
 		if err != nil {
@@ -1601,18 +1572,14 @@ func (a *covenantlessArkClient) addInputs(
 			Sequence: sequence,
 		})
 
-		vtxoScript := &bitcointree.DefaultVtxoScript{
-			Owner:     userPubkey,
-			Asp:       aspPubkey,
-			ExitDelay: utxo.Delay,
+		exitClosures := vtxoScript.ExitClosures()
+		if len(exitClosures) <= 0 {
+			return fmt.Errorf("no exit closures found")
 		}
 
-		exitClosure := &bitcointree.CSVSigClosure{
-			Pubkey:  userPubkey,
-			Seconds: uint(utxo.Delay),
-		}
+		exitClosure := exitClosures[0]
 
-		exitLeaf, err := exitClosure.Leaf()
+		exitScript, err := exitClosure.Script()
 		if err != nil {
 			return err
 		}
@@ -1622,6 +1589,7 @@ func (a *covenantlessArkClient) addInputs(
 			return err
 		}
 
+		exitLeaf := txscript.NewBaseTapLeaf(exitScript)
 		leafProof, err := taprootTree.GetTaprootMerkleProof(exitLeaf.TapHash())
 		if err != nil {
 			return fmt.Errorf("failed to get taproot merkle proof: %s", err)
@@ -1644,7 +1612,7 @@ func (a *covenantlessArkClient) addInputs(
 func (a *covenantlessArkClient) handleRoundStream(
 	ctx context.Context,
 	paymentID string,
-	vtxosToSign []client.DescriptorVtxo,
+	vtxosToSign []client.TapscriptsVtxo,
 	boardingUtxos []types.Utxo,
 	receivers []client.Output,
 	roundEphemeralKey *secp256k1.PrivateKey,
@@ -1763,12 +1731,12 @@ func (a *covenantlessArkClient) handleRoundStream(
 func (a *covenantlessArkClient) handleRoundSigningStarted(
 	ctx context.Context, ephemeralKey *secp256k1.PrivateKey, event client.RoundSigningStartedEvent,
 ) (signerSession bitcointree.SignerSession, err error) {
-	sweepClosure := bitcointree.CSVSigClosure{
-		Pubkey:  a.AspPubkey,
-		Seconds: uint(a.RoundLifetime),
+	sweepClosure := tree.CSVSigClosure{
+		MultisigClosure: tree.MultisigClosure{PubKeys: []*secp256k1.PublicKey{a.AspPubkey}},
+		Seconds:         uint(a.RoundLifetime),
 	}
 
-	sweepTapLeaf, err := sweepClosure.Leaf()
+	script, err := sweepClosure.Script()
 	if err != nil {
 		return
 	}
@@ -1781,7 +1749,8 @@ func (a *covenantlessArkClient) handleRoundSigningStarted(
 	sharedOutput := roundTx.UnsignedTx.TxOut[0]
 	sharedOutputValue := sharedOutput.Value
 
-	sweepTapTree := txscript.AssembleTaprootScriptTree(*sweepTapLeaf)
+	sweepTapLeaf := txscript.NewBaseTapLeaf(script)
+	sweepTapTree := txscript.AssembleTaprootScriptTree(sweepTapLeaf)
 	root := sweepTapTree.RootNode.TapHash()
 
 	signerSession = bitcointree.NewTreeSignerSession(
@@ -1838,7 +1807,7 @@ func (a *covenantlessArkClient) handleRoundSigningNoncesGenerated(
 func (a *covenantlessArkClient) handleRoundFinalization(
 	ctx context.Context,
 	event client.RoundFinalizationEvent,
-	vtxos []client.DescriptorVtxo,
+	vtxos []client.TapscriptsVtxo,
 	boardingUtxos []types.Utxo,
 	receivers []client.Output,
 ) ([]string, string, error) {
@@ -1870,27 +1839,20 @@ func (a *covenantlessArkClient) handleRoundFinalization(
 	}
 
 	for _, boardingUtxo := range boardingUtxos {
-		boardingVtxoScript, err := bitcointree.ParseVtxoScript(boardingUtxo.Descriptor)
+		boardingVtxoScript, err := bitcointree.ParseVtxoScript(boardingUtxo.Tapscripts)
 		if err != nil {
 			return nil, "", err
 		}
 
-		var myPubkey *secp256k1.PublicKey
-
-		switch v := boardingVtxoScript.(type) {
-		case *bitcointree.DefaultVtxoScript:
-			myPubkey = v.Owner
-		default:
-			return nil, "", fmt.Errorf("unsupported boarding descriptor: %s", boardingUtxo.Descriptor)
-		}
-
 		// add tapscript leaf
-		forfeitClosure := &bitcointree.MultisigClosure{
-			Pubkey:    myPubkey,
-			AspPubkey: a.AspPubkey,
+		forfeitClosures := boardingVtxoScript.ForfeitClosures()
+		if len(forfeitClosures) <= 0 {
+			return nil, "", fmt.Errorf("no forfeit closures found")
 		}
 
-		forfeitLeaf, err := forfeitClosure.Leaf()
+		forfeitClosure := forfeitClosures[0]
+
+		forfeitScript, err := forfeitClosure.Script()
 		if err != nil {
 			return nil, "", err
 		}
@@ -1900,6 +1862,7 @@ func (a *covenantlessArkClient) handleRoundFinalization(
 			return nil, "", err
 		}
 
+		forfeitLeaf := txscript.NewBaseTapLeaf(forfeitScript)
 		forfeitProof, err := taprootTree.GetTaprootMerkleProof(forfeitLeaf.TapHash())
 		if err != nil {
 			return nil, "", fmt.Errorf("failed to get taproot merkle proof for boarding utxo: %s", err)
@@ -2070,7 +2033,7 @@ func (a *covenantlessArkClient) validateOffChainReceiver(
 
 func (a *covenantlessArkClient) createAndSignForfeits(
 	ctx context.Context,
-	vtxosToSign []client.DescriptorVtxo,
+	vtxosToSign []client.TapscriptsVtxo,
 	connectors []string,
 	feeRate chainfee.SatPerKVByte,
 ) ([]string, error) {
@@ -2102,7 +2065,7 @@ func (a *covenantlessArkClient) createAndSignForfeits(
 	}
 
 	for _, vtxo := range vtxosToSign {
-		vtxoScript, err := bitcointree.ParseVtxoScript(vtxo.Descriptor)
+		vtxoScript, err := bitcointree.ParseVtxoScript(vtxo.Tapscripts)
 		if err != nil {
 			return nil, err
 		}
@@ -2127,25 +2090,19 @@ func (a *covenantlessArkClient) createAndSignForfeits(
 			Index: vtxo.VOut,
 		}
 
-		var forfeitClosure bitcointree.Closure
-		var witnessSize int
-
-		switch v := vtxoScript.(type) {
-		case *bitcointree.DefaultVtxoScript:
-			forfeitClosure = &bitcointree.MultisigClosure{
-				Pubkey:    v.Owner,
-				AspPubkey: a.AspPubkey,
-			}
-			witnessSize = 64 * 2
-		default:
-			return nil, fmt.Errorf("unsupported vtxo script: %T", vtxoScript)
+		forfeitClosures := vtxoScript.ForfeitClosures()
+		if len(forfeitClosures) <= 0 {
+			return nil, fmt.Errorf("no forfeit closures found")
 		}
 
-		forfeitLeaf, err := forfeitClosure.Leaf()
+		forfeitClosure := forfeitClosures[0]
+
+		forfeitScript, err := forfeitClosure.Script()
 		if err != nil {
 			return nil, err
 		}
 
+		forfeitLeaf := txscript.NewBaseTapLeaf(forfeitScript)
 		leafProof, err := vtxoTapTree.GetTaprootMerkleProof(forfeitLeaf.TapHash())
 		if err != nil {
 			return nil, err
@@ -2168,7 +2125,7 @@ func (a *covenantlessArkClient) createAndSignForfeits(
 				RevealedScript: leafProof.Script,
 				ControlBlock:   ctrlBlock,
 			},
-			witnessSize,
+			forfeitClosure.WitnessSize(),
 			parsedScript.Class(),
 		)
 		if err != nil {
@@ -2221,25 +2178,23 @@ func (a *covenantlessArkClient) coinSelectOnchain(
 
 	fetchedUtxos := make([]types.Utxo, 0)
 	for _, addr := range boardingAddrs {
-		boardingScript, err := bitcointree.ParseVtxoScript(addr.Descriptor)
+		boardingScript, err := bitcointree.ParseVtxoScript(addr.Tapscripts)
 		if err != nil {
 			return nil, 0, err
 		}
 
-		var boardingTimeout uint
-
-		if defaultVtxo, ok := boardingScript.(*bitcointree.DefaultVtxoScript); ok {
-			boardingTimeout = defaultVtxo.ExitDelay
-		} else {
-			return nil, 0, fmt.Errorf("unsupported boarding descriptor: %s", addr.Descriptor)
+		boardingTimeout, err := boardingScript.SmallestExitDelay()
+		if err != nil {
+			return nil, 0, err
 		}
+
 		utxos, err := a.explorer.GetUtxos(addr.Address)
 		if err != nil {
 			return nil, 0, err
 		}
 
 		for _, utxo := range utxos {
-			u := utxo.ToUtxo(boardingTimeout, addr.Descriptor)
+			u := utxo.ToUtxo(boardingTimeout, addr.Tapscripts)
 			if u.SpendableAt.Before(now) {
 				fetchedUtxos = append(fetchedUtxos, u)
 			}
@@ -2275,7 +2230,7 @@ func (a *covenantlessArkClient) coinSelectOnchain(
 		}
 
 		for _, utxo := range utxos {
-			u := utxo.ToUtxo(uint(a.UnilateralExitDelay), addr.Descriptor)
+			u := utxo.ToUtxo(uint(a.UnilateralExitDelay), addr.Tapscripts)
 			if u.SpendableAt.Before(now) {
 				fetchedUtxos = append(fetchedUtxos, u)
 			}
@@ -2407,7 +2362,7 @@ func (a *covenantlessArkClient) getAllBoardingUtxos(
 						VOut:       uint32(i),
 						Amount:     vout.Amount,
 						CreatedAt:  createdAt,
-						Descriptor: addr.Descriptor,
+						Tapscripts: addr.Tapscripts,
 						Spent:      spent,
 					})
 				}
@@ -2427,17 +2382,14 @@ func (a *covenantlessArkClient) getClaimableBoardingUtxos(ctx context.Context, o
 	claimable := make([]types.Utxo, 0)
 
 	for _, addr := range boardingAddrs {
-		boardingScript, err := bitcointree.ParseVtxoScript(addr.Descriptor)
+		boardingScript, err := bitcointree.ParseVtxoScript(addr.Tapscripts)
 		if err != nil {
 			return nil, err
 		}
 
-		var boardingTimeout uint
-
-		if defaultVtxo, ok := boardingScript.(*bitcointree.DefaultVtxoScript); ok {
-			boardingTimeout = defaultVtxo.ExitDelay
-		} else {
-			return nil, fmt.Errorf("unsupported boarding descriptor: %s", addr.Descriptor)
+		boardingTimeout, err := boardingScript.SmallestExitDelay()
+		if err != nil {
+			return nil, err
 		}
 
 		boardingUtxos, err := a.explorer.GetUtxos(addr.Address)
@@ -2466,7 +2418,7 @@ func (a *covenantlessArkClient) getClaimableBoardingUtxos(ctx context.Context, o
 				}
 			}
 
-			u := utxo.ToUtxo(boardingTimeout, addr.Descriptor)
+			u := utxo.ToUtxo(boardingTimeout, addr.Tapscripts)
 			if u.SpendableAt.Before(now) {
 				continue
 			}
diff --git a/pkg/client-sdk/explorer/explorer.go b/pkg/client-sdk/explorer/explorer.go
index 3c64e63..aeb5270 100644
--- a/pkg/client-sdk/explorer/explorer.go
+++ b/pkg/client-sdk/explorer/explorer.go
@@ -53,8 +53,8 @@ type SpentStatus struct {
 	SpentBy string `json:"txid,omitempty"`
 }
 
-func (e ExplorerUtxo) ToUtxo(delay uint, descriptor string) types.Utxo {
-	return newUtxo(e, delay, descriptor)
+func (e ExplorerUtxo) ToUtxo(delay uint, tapscripts []string) types.Utxo {
+	return newUtxo(e, delay, tapscripts)
 }
 
 type Explorer interface {
@@ -415,7 +415,7 @@ func parseBitcoinTx(txStr string) (string, string, error) {
 	return txhex, txid, nil
 }
 
-func newUtxo(explorerUtxo ExplorerUtxo, delay uint, descriptor string) types.Utxo {
+func newUtxo(explorerUtxo ExplorerUtxo, delay uint, tapscripts []string) types.Utxo {
 	utxoTime := explorerUtxo.Status.Blocktime
 	createdAt := time.Unix(utxoTime, 0)
 	if utxoTime == 0 {
@@ -431,6 +431,6 @@ func newUtxo(explorerUtxo ExplorerUtxo, delay uint, descriptor string) types.Utx
 		Delay:       delay,
 		SpendableAt: time.Unix(utxoTime, 0).Add(time.Duration(delay) * time.Second),
 		CreatedAt:   createdAt,
-		Descriptor:  descriptor,
+		Tapscripts:  tapscripts,
 	}
 }
diff --git a/pkg/client-sdk/internal/utils/utils.go b/pkg/client-sdk/internal/utils/utils.go
index eaeabbe..40fb3a7 100644
--- a/pkg/client-sdk/internal/utils/utils.go
+++ b/pkg/client-sdk/internal/utils/utils.go
@@ -24,12 +24,12 @@ import (
 
 func CoinSelect(
 	boardingUtxos []types.Utxo,
-	vtxos []client.DescriptorVtxo,
+	vtxos []client.TapscriptsVtxo,
 	amount,
 	dust uint64,
 	sortByExpirationTime bool,
-) ([]types.Utxo, []client.DescriptorVtxo, uint64, error) {
-	selected, notSelected := make([]client.DescriptorVtxo, 0), make([]client.DescriptorVtxo, 0)
+) ([]types.Utxo, []client.TapscriptsVtxo, uint64, error) {
+	selected, notSelected := make([]client.TapscriptsVtxo, 0), make([]client.TapscriptsVtxo, 0)
 	selectedBoarding, notSelectedBoarding := make([]types.Utxo, 0), make([]types.Utxo, 0)
 	selectedAmount := uint64(0)
 
diff --git a/pkg/client-sdk/redemption/covenantless_redeem.go b/pkg/client-sdk/redemption/covenantless_redeem.go
index d1bf096..1b15830 100644
--- a/pkg/client-sdk/redemption/covenantless_redeem.go
+++ b/pkg/client-sdk/redemption/covenantless_redeem.go
@@ -7,7 +7,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/ark-network/ark/common/bitcointree"
 	"github.com/ark-network/ark/common/tree"
 	"github.com/ark-network/ark/pkg/client-sdk/client"
 	"github.com/ark-network/ark/pkg/client-sdk/explorer"
@@ -172,7 +171,7 @@ func findCovenantlessSweepClosure(
 	var seconds uint
 	var sweepClosure *txscript.TapLeaf
 	for _, tapLeaf := range tx.Inputs[0].TaprootLeafScript {
-		closure := &bitcointree.CSVSigClosure{}
+		closure := &tree.CSVSigClosure{}
 		valid, err := closure.Decode(tapLeaf.Script)
 		if err != nil {
 			continue
diff --git a/pkg/client-sdk/types/types.go b/pkg/client-sdk/types/types.go
index b034c05..cdb4e70 100644
--- a/pkg/client-sdk/types/types.go
+++ b/pkg/client-sdk/types/types.go
@@ -113,7 +113,7 @@ type Utxo struct {
 	Delay       uint
 	SpendableAt time.Time
 	CreatedAt   time.Time
-	Descriptor  string
+	Tapscripts  []string
 	Spent       bool
 }
 
diff --git a/pkg/client-sdk/wallet/singlekey/bitcoin_wallet.go b/pkg/client-sdk/wallet/singlekey/bitcoin_wallet.go
index 94f1326..70cf402 100644
--- a/pkg/client-sdk/wallet/singlekey/bitcoin_wallet.go
+++ b/pkg/client-sdk/wallet/singlekey/bitcoin_wallet.go
@@ -9,6 +9,7 @@ import (
 
 	"github.com/ark-network/ark/common"
 	"github.com/ark-network/ark/common/bitcointree"
+	"github.com/ark-network/ark/common/tree"
 	"github.com/ark-network/ark/pkg/client-sdk/explorer"
 	"github.com/ark-network/ark/pkg/client-sdk/internal/utils"
 	"github.com/ark-network/ark/pkg/client-sdk/types"
@@ -43,7 +44,7 @@ func NewBitcoinWallet(
 
 func (w *bitcoinWallet) GetAddresses(
 	ctx context.Context,
-) ([]wallet.DescriptorAddress, []wallet.DescriptorAddress, []wallet.DescriptorAddress, error) {
+) ([]wallet.TapscriptsAddress, []wallet.TapscriptsAddress, []wallet.TapscriptsAddress, error) {
 	offchainAddr, boardingAddr, err := w.getAddress(ctx)
 	if err != nil {
 		return nil, nil, nil, err
@@ -69,21 +70,21 @@ func (w *bitcoinWallet) GetAddresses(
 		return nil, nil, nil, err
 	}
 
-	offchainAddrs := []wallet.DescriptorAddress{
+	offchainAddrs := []wallet.TapscriptsAddress{
 		{
-			Descriptor: offchainAddr.Descriptor,
+			Tapscripts: offchainAddr.Tapscripts,
 			Address:    encodedOffchainAddr,
 		},
 	}
-	boardingAddrs := []wallet.DescriptorAddress{
+	boardingAddrs := []wallet.TapscriptsAddress{
 		{
-			Descriptor: boardingAddr.Descriptor,
+			Tapscripts: boardingAddr.Tapscripts,
 			Address:    boardingAddr.Address,
 		},
 	}
-	redemptionAddrs := []wallet.DescriptorAddress{
+	redemptionAddrs := []wallet.TapscriptsAddress{
 		{
-			Descriptor: offchainAddr.Descriptor,
+			Tapscripts: offchainAddr.Tapscripts,
 			Address:    redemptionAddr.EncodeAddress(),
 		},
 	}
@@ -92,7 +93,7 @@ func (w *bitcoinWallet) GetAddresses(
 
 func (w *bitcoinWallet) NewAddress(
 	ctx context.Context, _ bool,
-) (*wallet.DescriptorAddress, *wallet.DescriptorAddress, error) {
+) (*wallet.TapscriptsAddress, *wallet.TapscriptsAddress, error) {
 	offchainAddr, boardingAddr, err := w.getAddress(ctx)
 	if err != nil {
 		return nil, nil, err
@@ -103,34 +104,34 @@ func (w *bitcoinWallet) NewAddress(
 		return nil, nil, err
 	}
 
-	return &wallet.DescriptorAddress{
-		Descriptor: offchainAddr.Descriptor,
+	return &wallet.TapscriptsAddress{
+		Tapscripts: offchainAddr.Tapscripts,
 		Address:    encodedOffchainAddr,
 	}, boardingAddr, nil
 }
 
 func (w *bitcoinWallet) NewAddresses(
 	ctx context.Context, _ bool, num int,
-) ([]wallet.DescriptorAddress, []wallet.DescriptorAddress, error) {
+) ([]wallet.TapscriptsAddress, []wallet.TapscriptsAddress, error) {
 	offchainAddr, boardingAddr, err := w.getAddress(ctx)
 	if err != nil {
 		return nil, nil, err
 	}
 
-	offchainAddrs := make([]wallet.DescriptorAddress, 0, num)
-	boardingAddrs := make([]wallet.DescriptorAddress, 0, num)
+	offchainAddrs := make([]wallet.TapscriptsAddress, 0, num)
+	boardingAddrs := make([]wallet.TapscriptsAddress, 0, num)
 	for i := 0; i < num; i++ {
 		encodedOffchainAddr, err := offchainAddr.Address.Encode()
 		if err != nil {
 			return nil, nil, err
 		}
 
-		offchainAddrs = append(offchainAddrs, wallet.DescriptorAddress{
-			Descriptor: offchainAddr.Descriptor,
+		offchainAddrs = append(offchainAddrs, wallet.TapscriptsAddress{
+			Tapscripts: offchainAddr.Tapscripts,
 			Address:    encodedOffchainAddr,
 		})
-		boardingAddrs = append(boardingAddrs, wallet.DescriptorAddress{
-			Descriptor: boardingAddr.Descriptor,
+		boardingAddrs = append(boardingAddrs, wallet.TapscriptsAddress{
+			Tapscripts: boardingAddr.Tapscripts,
 			Address:    boardingAddr.Address,
 		})
 	}
@@ -192,12 +193,12 @@ func (s *bitcoinWallet) SignTransaction(
 	)
 
 	txsighashes := txscript.NewTxSigHashes(updater.Upsbt.UnsignedTx, prevoutFetcher)
+	myPubkey := schnorr.SerializePubKey(s.walletData.Pubkey)
 
 	for i, input := range ptx.Inputs {
 		if len(input.TaprootLeafScript) > 0 {
-			pubkey := s.walletData.Pubkey
 			for _, leaf := range input.TaprootLeafScript {
-				closure, err := bitcointree.DecodeClosure(leaf.Script)
+				closure, err := tree.DecodeClosure(leaf.Script)
 				if err != nil {
 					return "", err
 				}
@@ -205,10 +206,20 @@ func (s *bitcoinWallet) SignTransaction(
 				sign := false
 
 				switch c := closure.(type) {
-				case *bitcointree.CSVSigClosure:
-					sign = bytes.Equal(c.Pubkey.SerializeCompressed()[1:], pubkey.SerializeCompressed()[1:])
-				case *bitcointree.MultisigClosure:
-					sign = bytes.Equal(c.Pubkey.SerializeCompressed()[1:], pubkey.SerializeCompressed()[1:])
+				case *tree.CSVSigClosure:
+					for _, key := range c.MultisigClosure.PubKeys {
+						if bytes.Equal(schnorr.SerializePubKey(key), myPubkey) {
+							sign = true
+							break
+						}
+					}
+				case *tree.MultisigClosure:
+					for _, key := range c.PubKeys {
+						if bytes.Equal(schnorr.SerializePubKey(key), myPubkey) {
+							sign = true
+							break
+						}
+					}
 				}
 
 				if sign {
@@ -235,7 +246,7 @@ func (s *bitcoinWallet) SignTransaction(
 						return "", err
 					}
 
-					if !sig.Verify(preimage, pubkey) {
+					if !sig.Verify(preimage, s.walletData.Pubkey) {
 						return "", fmt.Errorf("signature verification failed")
 					}
 
@@ -244,7 +255,7 @@ func (s *bitcoinWallet) SignTransaction(
 					}
 
 					updater.Upsbt.Inputs[i].TaprootScriptSpendSig = append(updater.Upsbt.Inputs[i].TaprootScriptSpendSig, &psbt.TaprootScriptSpendSig{
-						XOnlyPubKey: schnorr.SerializePubKey(pubkey),
+						XOnlyPubKey: myPubkey,
 						LeafHash:    hash.CloneBytes(),
 						Signature:   sig.Serialize(),
 						SigHash:     txscript.SigHashDefault,
@@ -259,17 +270,12 @@ func (s *bitcoinWallet) SignTransaction(
 }
 
 func (w *bitcoinWallet) SignMessage(
-	ctx context.Context, message []byte, pubkey string,
+	ctx context.Context, message []byte,
 ) (string, error) {
 	if w.IsLocked() {
 		return "", fmt.Errorf("wallet is locked")
 	}
 
-	walletPubkeyHex := hex.EncodeToString(schnorr.SerializePubKey(w.walletData.Pubkey))
-	if walletPubkeyHex != pubkey {
-		return "", fmt.Errorf("pubkey mismatch, cannot sign message")
-	}
-
 	sig, err := schnorr.Sign(w.privateKey, message)
 	if err != nil {
 		return "", err
@@ -278,14 +284,16 @@ func (w *bitcoinWallet) SignMessage(
 	return hex.EncodeToString(sig.Serialize()), nil
 }
 
+type addressWithTapscripts struct {
+	Address    common.Address
+	Tapscripts []string
+}
+
 func (w *bitcoinWallet) getAddress(
 	ctx context.Context,
 ) (
-	*struct {
-		Address    common.Address
-		Descriptor string
-	},
-	*wallet.DescriptorAddress,
+	*addressWithTapscripts,
+	*wallet.TapscriptsAddress,
 	error,
 ) {
 	if w.walletData == nil {
@@ -299,11 +307,11 @@ func (w *bitcoinWallet) getAddress(
 
 	netParams := utils.ToBitcoinNetwork(data.Network)
 
-	defaultVtxoScript := &bitcointree.DefaultVtxoScript{
-		Asp:       data.AspPubkey,
-		Owner:     w.walletData.Pubkey,
-		ExitDelay: uint(data.UnilateralExitDelay),
-	}
+	defaultVtxoScript := bitcointree.NewDefaultVtxoScript(
+		w.walletData.Pubkey,
+		data.AspPubkey,
+		uint(data.UnilateralExitDelay),
+	)
 
 	vtxoTapKey, _, err := defaultVtxoScript.TapTree()
 	if err != nil {
@@ -316,16 +324,12 @@ func (w *bitcoinWallet) getAddress(
 		VtxoTapKey: vtxoTapKey,
 	}
 
-	myPubkeyStr := hex.EncodeToString(schnorr.SerializePubKey(w.walletData.Pubkey))
-	descriptorStr := strings.ReplaceAll(
-		data.BoardingDescriptorTemplate, "USER", myPubkeyStr,
+	boardingVtxoScript := bitcointree.NewDefaultVtxoScript(
+		w.walletData.Pubkey,
+		data.AspPubkey,
+		uint(data.UnilateralExitDelay*2),
 	)
 
-	boardingVtxoScript, err := bitcointree.ParseVtxoScript(descriptorStr)
-	if err != nil {
-		return nil, nil, err
-	}
-
 	boardingTapKey, _, err := boardingVtxoScript.TapTree()
 	if err != nil {
 		return nil, nil, err
@@ -339,14 +343,22 @@ func (w *bitcoinWallet) getAddress(
 		return nil, nil, err
 	}
 
-	return &struct {
-			Address    common.Address
-			Descriptor string
-		}{
-			*offchainAddress, defaultVtxoScript.ToDescriptor(),
+	tapscripts, err := defaultVtxoScript.Encode()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	boardingTapscripts, err := boardingVtxoScript.Encode()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return &addressWithTapscripts{
+			Address:    *offchainAddress,
+			Tapscripts: tapscripts,
 		},
-		&wallet.DescriptorAddress{
-			Descriptor: descriptorStr,
+		&wallet.TapscriptsAddress{
+			Tapscripts: boardingTapscripts,
 			Address:    boardingAddr.EncodeAddress(),
 		},
 		nil
diff --git a/pkg/client-sdk/wallet/singlekey/liquid_wallet.go b/pkg/client-sdk/wallet/singlekey/liquid_wallet.go
index fd26307..c89dd62 100644
--- a/pkg/client-sdk/wallet/singlekey/liquid_wallet.go
+++ b/pkg/client-sdk/wallet/singlekey/liquid_wallet.go
@@ -5,7 +5,6 @@ import (
 	"context"
 	"encoding/hex"
 	"fmt"
-	"strings"
 
 	"github.com/ark-network/ark/common"
 	"github.com/ark-network/ark/common/tree"
@@ -44,7 +43,7 @@ func NewLiquidWallet(
 
 func (w *liquidWallet) GetAddresses(
 	ctx context.Context,
-) ([]wallet.DescriptorAddress, []wallet.DescriptorAddress, []wallet.DescriptorAddress, error) {
+) ([]wallet.TapscriptsAddress, []wallet.TapscriptsAddress, []wallet.TapscriptsAddress, error) {
 	offchainAddr, boardingAddr, err := w.getAddress(ctx)
 	if err != nil {
 		return nil, nil, nil, err
@@ -72,22 +71,22 @@ func (w *liquidWallet) GetAddresses(
 		return nil, nil, nil, err
 	}
 
-	offchainAddrs := []wallet.DescriptorAddress{
+	offchainAddrs := []wallet.TapscriptsAddress{
 		{
-			Descriptor: offchainAddr.Descriptor,
+			Tapscripts: offchainAddr.Tapscripts,
 			Address:    encodedOffchainAddr,
 		},
 	}
-	boardingAddrs := []wallet.DescriptorAddress{
+	boardingAddrs := []wallet.TapscriptsAddress{
 		{
-			Descriptor: boardingAddr.Descriptor,
+			Tapscripts: boardingAddr.Tapscripts,
 			Address:    boardingAddr.Address,
 		},
 	}
 
-	redemptionAddrs := []wallet.DescriptorAddress{
+	redemptionAddrs := []wallet.TapscriptsAddress{
 		{
-			Descriptor: offchainAddr.Descriptor,
+			Tapscripts: offchainAddr.Tapscripts,
 			Address:    redemptionAddr,
 		},
 	}
@@ -97,7 +96,7 @@ func (w *liquidWallet) GetAddresses(
 
 func (w *liquidWallet) NewAddress(
 	ctx context.Context, _ bool,
-) (*wallet.DescriptorAddress, *wallet.DescriptorAddress, error) {
+) (*wallet.TapscriptsAddress, *wallet.TapscriptsAddress, error) {
 	offchainAddr, boardingAddr, err := w.getAddress(ctx)
 	if err != nil {
 		return nil, nil, err
@@ -108,37 +107,37 @@ func (w *liquidWallet) NewAddress(
 		return nil, nil, err
 	}
 
-	return &wallet.DescriptorAddress{
-			Descriptor: offchainAddr.Descriptor,
+	return &wallet.TapscriptsAddress{
+			Tapscripts: offchainAddr.Tapscripts,
 			Address:    encodedOffchainAddr,
-		}, &wallet.DescriptorAddress{
-			Descriptor: boardingAddr.Descriptor,
+		}, &wallet.TapscriptsAddress{
+			Tapscripts: boardingAddr.Tapscripts,
 			Address:    boardingAddr.Address,
 		}, nil
 }
 
 func (w *liquidWallet) NewAddresses(
 	ctx context.Context, _ bool, num int,
-) ([]wallet.DescriptorAddress, []wallet.DescriptorAddress, error) {
+) ([]wallet.TapscriptsAddress, []wallet.TapscriptsAddress, error) {
 	offchainAddr, boardingAddr, err := w.getAddress(ctx)
 	if err != nil {
 		return nil, nil, err
 	}
 
-	offchainAddrs := make([]wallet.DescriptorAddress, 0, num)
-	boardingAddrs := make([]wallet.DescriptorAddress, 0, num)
+	offchainAddrs := make([]wallet.TapscriptsAddress, 0, num)
+	boardingAddrs := make([]wallet.TapscriptsAddress, 0, num)
 	for i := 0; i < num; i++ {
 		encodedOffchainAddr, err := offchainAddr.Address.Encode()
 		if err != nil {
 			return nil, nil, err
 		}
 
-		offchainAddrs = append(offchainAddrs, wallet.DescriptorAddress{
-			Descriptor: offchainAddr.Descriptor,
+		offchainAddrs = append(offchainAddrs, wallet.TapscriptsAddress{
+			Tapscripts: offchainAddr.Tapscripts,
 			Address:    encodedOffchainAddr,
 		})
-		boardingAddrs = append(boardingAddrs, wallet.DescriptorAddress{
-			Descriptor: boardingAddr.Descriptor,
+		boardingAddrs = append(boardingAddrs, wallet.TapscriptsAddress{
+			Tapscripts: boardingAddr.Tapscripts,
 			Address:    boardingAddr.Address,
 		})
 	}
@@ -212,7 +211,7 @@ func (s *liquidWallet) SignTransaction(
 		prevoutsAssets = append(prevoutsAssets, input.WitnessUtxo.Asset)
 	}
 
-	serializedPubKey := s.walletData.Pubkey.SerializeCompressed()
+	myPubkey := schnorr.SerializePubKey(s.walletData.Pubkey)
 
 	for i, input := range pset.Inputs {
 		if len(input.TapLeafScript) > 0 {
@@ -230,9 +229,19 @@ func (s *liquidWallet) SignTransaction(
 				sign := false
 				switch c := closure.(type) {
 				case *tree.CSVSigClosure:
-					sign = bytes.Equal(c.Pubkey.SerializeCompressed()[1:], serializedPubKey[1:])
+					for _, key := range c.MultisigClosure.PubKeys {
+						if bytes.Equal(schnorr.SerializePubKey(key), myPubkey) {
+							sign = true
+							break
+						}
+					}
 				case *tree.MultisigClosure:
-					sign = bytes.Equal(c.Pubkey.SerializeCompressed()[1:], serializedPubKey[1:])
+					for _, key := range c.PubKeys {
+						if bytes.Equal(schnorr.SerializePubKey(key), myPubkey) {
+							sign = true
+							break
+						}
+					}
 				}
 
 				if sign {
@@ -288,17 +297,12 @@ func (s *liquidWallet) SignTransaction(
 }
 
 func (w *liquidWallet) SignMessage(
-	ctx context.Context, message []byte, pubkey string,
+	ctx context.Context, message []byte,
 ) (string, error) {
 	if w.IsLocked() {
 		return "", fmt.Errorf("wallet is locked")
 	}
 
-	walletPubkeyHex := hex.EncodeToString(schnorr.SerializePubKey(w.walletData.Pubkey))
-	if walletPubkeyHex != pubkey {
-		return "", fmt.Errorf("pubkey mismatch, cannot sign message")
-	}
-
 	sig, err := schnorr.Sign(w.privateKey, message)
 	if err != nil {
 		return "", err
@@ -310,11 +314,8 @@ func (w *liquidWallet) SignMessage(
 func (w *liquidWallet) getAddress(
 	ctx context.Context,
 ) (
-	*struct {
-		Address    common.Address
-		Descriptor string
-	},
-	*wallet.DescriptorAddress,
+	*addressWithTapscripts,
+	*wallet.TapscriptsAddress,
 	error,
 ) {
 	if w.walletData == nil {
@@ -328,11 +329,11 @@ func (w *liquidWallet) getAddress(
 
 	liquidNet := utils.ToElementsNetwork(data.Network)
 
-	vtxoScript := &tree.DefaultVtxoScript{
-		Owner:     w.walletData.Pubkey,
-		Asp:       data.AspPubkey,
-		ExitDelay: uint(data.UnilateralExitDelay),
-	}
+	vtxoScript := tree.NewDefaultVtxoScript(
+		w.walletData.Pubkey,
+		data.AspPubkey,
+		uint(data.UnilateralExitDelay),
+	)
 
 	vtxoTapKey, _, err := vtxoScript.TapTree()
 	if err != nil {
@@ -345,22 +346,18 @@ func (w *liquidWallet) getAddress(
 		VtxoTapKey: vtxoTapKey,
 	}
 
-	myPubkeyStr := hex.EncodeToString(schnorr.SerializePubKey(w.walletData.Pubkey))
-	descriptorStr := strings.ReplaceAll(
-		data.BoardingDescriptorTemplate, "USER", myPubkeyStr,
+	boardingVtxoScript := tree.NewDefaultVtxoScript(
+		w.walletData.Pubkey,
+		data.AspPubkey,
+		uint(data.UnilateralExitDelay*2),
 	)
 
-	onboardingScript, err := tree.ParseVtxoScript(descriptorStr)
+	boardingTapKey, _, err := boardingVtxoScript.TapTree()
 	if err != nil {
 		return nil, nil, err
 	}
 
-	tapKey, _, err := onboardingScript.TapTree()
-	if err != nil {
-		return nil, nil, err
-	}
-
-	p2tr, err := payment.FromTweakedKey(tapKey, &liquidNet, nil)
+	p2tr, err := payment.FromTweakedKey(boardingTapKey, &liquidNet, nil)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -370,14 +367,21 @@ func (w *liquidWallet) getAddress(
 		return nil, nil, err
 	}
 
-	return &struct {
-			Address    common.Address
-			Descriptor string
-		}{
+	tapscripts, err := vtxoScript.Encode()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	boardingTapscripts, err := boardingVtxoScript.Encode()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return &addressWithTapscripts{
 			Address:    *offchainAddr,
-			Descriptor: vtxoScript.ToDescriptor(),
-		}, &wallet.DescriptorAddress{
-			Descriptor: descriptorStr,
+			Tapscripts: tapscripts,
+		}, &wallet.TapscriptsAddress{
+			Tapscripts: boardingTapscripts,
 			Address:    boardingAddr,
 		}, nil
 }
diff --git a/pkg/client-sdk/wallet/wallet.go b/pkg/client-sdk/wallet/wallet.go
index 284eca6..f50772a 100644
--- a/pkg/client-sdk/wallet/wallet.go
+++ b/pkg/client-sdk/wallet/wallet.go
@@ -10,8 +10,8 @@ const (
 	SingleKeyWallet = "singlekey"
 )
 
-type DescriptorAddress struct {
-	Descriptor string
+type TapscriptsAddress struct {
+	Tapscripts []string
 	Address    string
 }
 
@@ -25,18 +25,18 @@ type WalletService interface {
 	IsLocked() bool
 	GetAddresses(
 		ctx context.Context,
-	) (offchainAddresses, boardingAddresses, redemptionAddresses []DescriptorAddress, err error)
+	) (offchainAddresses, boardingAddresses, redemptionAddresses []TapscriptsAddress, err error)
 	NewAddress(
 		ctx context.Context, change bool,
-	) (offchainAddr, onchainAddr *DescriptorAddress, err error)
+	) (offchainAddr, onchainAddr *TapscriptsAddress, err error)
 	NewAddresses(
 		ctx context.Context, change bool, num int,
-	) (offchainAddresses, onchainAddresses []DescriptorAddress, err error)
+	) (offchainAddresses, onchainAddresses []TapscriptsAddress, err error)
 	SignTransaction(
 		ctx context.Context, explorerSvc explorer.Explorer, tx string,
 	) (signedTx string, err error)
 	SignMessage(
-		ctx context.Context, message []byte, pubkey string,
+		ctx context.Context, message []byte,
 	) (signature string, err error)
 	Dump(ctx context.Context) (seed string, err error)
 }
diff --git a/server/internal/core/application/covenant.go b/server/internal/core/application/covenant.go
index a1c6ade..374ac19 100644
--- a/server/internal/core/application/covenant.go
+++ b/server/internal/core/application/covenant.go
@@ -9,7 +9,6 @@ import (
 	"time"
 
 	"github.com/ark-network/ark/common"
-	"github.com/ark-network/ark/common/descriptor"
 	"github.com/ark-network/ark/common/note"
 	"github.com/ark-network/ark/common/tree"
 	"github.com/ark-network/ark/server/internal/core/domain"
@@ -149,29 +148,30 @@ func (s *covenantService) Stop() {
 	close(s.eventsCh)
 }
 
-func (s *covenantService) GetBoardingAddress(ctx context.Context, userPubkey *secp256k1.PublicKey) (string, string, error) {
-	vtxoScript := &tree.DefaultVtxoScript{
-		Asp:       s.pubkey,
-		Owner:     userPubkey,
-		ExitDelay: uint(s.boardingExitDelay),
-	}
+func (s *covenantService) GetBoardingAddress(ctx context.Context, userPubkey *secp256k1.PublicKey) (string, []string, error) {
+	vtxoScript := tree.NewDefaultVtxoScript(userPubkey, s.pubkey, uint(s.boardingExitDelay))
 
 	tapKey, _, err := vtxoScript.TapTree()
 	if err != nil {
-		return "", "", fmt.Errorf("failed to get taproot key: %s", err)
+		return "", nil, fmt.Errorf("failed to get taproot key: %s", err)
 	}
 
 	p2tr, err := payment.FromTweakedKey(tapKey, s.onchainNetwork(), nil)
 	if err != nil {
-		return "", "", err
+		return "", nil, err
 	}
 
 	addr, err := p2tr.TaprootAddress()
 	if err != nil {
-		return "", "", err
+		return "", nil, err
 	}
 
-	return addr, vtxoScript.ToDescriptor(), nil
+	scripts, err := vtxoScript.Encode()
+	if err != nil {
+		return "", nil, err
+	}
+
+	return addr, scripts, nil
 }
 
 func (s *covenantService) SpendNotes(_ context.Context, _ []note.Note) (string, error) {
@@ -211,8 +211,18 @@ func (s *covenantService) SpendVtxos(ctx context.Context, inputs []ports.Input)
 					return "", fmt.Errorf("tx %s not confirmed", input.Txid)
 				}
 
+				vtxoScript, err := tree.ParseVtxoScript(input.Tapscripts)
+				if err != nil {
+					return "", fmt.Errorf("failed to parse boarding descriptor: %s", err)
+				}
+
+				exitDelay, err := vtxoScript.SmallestExitDelay()
+				if err != nil {
+					return "", fmt.Errorf("failed to get exit delay: %s", err)
+				}
+
 				// if the exit path is available, forbid registering the boarding utxo
-				if blocktime+int64(s.boardingExitDelay) < now {
+				if blocktime+int64(exitDelay) < now {
 					return "", fmt.Errorf("tx %s expired", input.Txid)
 				}
 
@@ -242,7 +252,7 @@ func (s *covenantService) SpendVtxos(ctx context.Context, inputs []ports.Input)
 			return "", fmt.Errorf("input %s:%d already swept", vtxo.Txid, vtxo.VOut)
 		}
 
-		vtxoScript, err := tree.ParseVtxoScript(input.Descriptor)
+		vtxoScript, err := tree.ParseVtxoScript(input.Tapscripts)
 		if err != nil {
 			return "", fmt.Errorf("failed to parse boarding descriptor: %s", err)
 		}
@@ -290,7 +300,7 @@ func (s *covenantService) newBoardingInput(tx *transaction.Transaction, input po
 		return nil, fmt.Errorf("failed to parse value: %s", err)
 	}
 
-	boardingScript, err := tree.ParseVtxoScript(input.Descriptor)
+	boardingScript, err := tree.ParseVtxoScript(input.Tapscripts)
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse boarding descriptor: %s", err)
 	}
@@ -309,16 +319,8 @@ func (s *covenantService) newBoardingInput(tx *transaction.Transaction, input po
 		return nil, fmt.Errorf("descriptor does not match script in transaction output")
 	}
 
-	if defaultVtxoScript, ok := boardingScript.(*tree.DefaultVtxoScript); ok {
-		if !bytes.Equal(schnorr.SerializePubKey(defaultVtxoScript.Asp), schnorr.SerializePubKey(s.pubkey)) {
-			return nil, fmt.Errorf("invalid boarding descriptor, ASP mismatch")
-		}
-
-		if defaultVtxoScript.ExitDelay != uint(s.boardingExitDelay) {
-			return nil, fmt.Errorf("invalid boarding descriptor, timeout mismatch")
-		}
-	} else {
-		return nil, fmt.Errorf("only default vtxo script is supported for boarding")
+	if err := boardingScript.Validate(s.pubkey, uint(s.unilateralExitDelay)); err != nil {
+		return nil, err
 	}
 
 	return &ports.BoardingInput{
@@ -430,15 +432,7 @@ func (s *covenantService) GetInfo(ctx context.Context) (*ServiceInfo, error) {
 		RoundInterval:       s.roundInterval,
 		Network:             s.network.Name,
 		Dust:                dust,
-		BoardingDescriptorTemplate: fmt.Sprintf(
-			descriptor.DefaultVtxoDescriptorTemplate,
-			hex.EncodeToString(tree.UnspendableKey().SerializeCompressed()),
-			"USER",
-			hex.EncodeToString(schnorr.SerializePubKey(s.pubkey)),
-			s.boardingExitDelay,
-			"USER",
-		),
-		ForfeitAddress: forfeitAddress,
+		ForfeitAddress:      forfeitAddress,
 	}, nil
 }
 
@@ -852,6 +846,7 @@ func (s *covenantService) reactToFraud(ctx context.Context, vtxo domain.Vtxo, mu
 
 	forfeitTxid, err := s.wallet.BroadcastTransaction(ctx, forfeitTxHex)
 	if err != nil {
+		log.Debug(forfeitTxHex)
 		return fmt.Errorf("failed to broadcast forfeit tx: %s", err)
 	}
 
diff --git a/server/internal/core/application/covenantless.go b/server/internal/core/application/covenantless.go
index f7e34db..470272a 100644
--- a/server/internal/core/application/covenantless.go
+++ b/server/internal/core/application/covenantless.go
@@ -11,7 +11,6 @@ import (
 
 	"github.com/ark-network/ark/common"
 	"github.com/ark-network/ark/common/bitcointree"
-	"github.com/ark-network/ark/common/descriptor"
 	"github.com/ark-network/ark/common/note"
 	"github.com/ark-network/ark/common/tree"
 	"github.com/ark-network/ark/server/internal/core/domain"
@@ -259,7 +258,7 @@ func (s *covenantlessService) CompleteAsyncPayment(
 		}
 
 		// verify the tapscript signatures
-		if valid, _, err := s.builder.VerifyTapscriptPartialSigs(tx); err != nil || !valid {
+		if valid, err := s.builder.VerifyTapscriptPartialSigs(tx); err != nil || !valid {
 			return fmt.Errorf("invalid tx signature: %s", err)
 		}
 	}
@@ -329,12 +328,12 @@ func (s *covenantlessService) CreateAsyncPayment(
 	ctx context.Context, inputs []AsyncPaymentInput, receivers []domain.Receiver,
 ) (string, error) {
 	vtxosKeys := make([]domain.VtxoKey, 0, len(inputs))
-	descriptors := make(map[domain.VtxoKey]string)
+	scripts := make(map[domain.VtxoKey][]string)
 	forfeitLeaves := make(map[domain.VtxoKey]chainhash.Hash)
 
 	for _, in := range inputs {
 		vtxosKeys = append(vtxosKeys, in.VtxoKey)
-		descriptors[in.VtxoKey] = in.Descriptor
+		scripts[in.VtxoKey] = in.Tapscripts
 		forfeitLeaves[in.VtxoKey] = in.ForfeitLeafHash
 	}
 
@@ -373,7 +372,7 @@ func (s *covenantlessService) CreateAsyncPayment(
 	}
 
 	redeemTx, err := s.builder.BuildAsyncPaymentTransactions(
-		vtxosInputs, descriptors, forfeitLeaves, receivers,
+		vtxosInputs, scripts, forfeitLeaves, receivers,
 	)
 	if err != nil {
 		return "", fmt.Errorf("failed to build async payment txs: %s", err)
@@ -395,26 +394,29 @@ func (s *covenantlessService) CreateAsyncPayment(
 
 func (s *covenantlessService) GetBoardingAddress(
 	ctx context.Context, userPubkey *secp256k1.PublicKey,
-) (address string, descriptor string, err error) {
-	vtxoScript := &bitcointree.DefaultVtxoScript{
-		Asp:       s.pubkey,
-		Owner:     userPubkey,
-		ExitDelay: uint(s.boardingExitDelay),
-	}
+) (address string, scripts []string, err error) {
+	vtxoScript := bitcointree.NewDefaultVtxoScript(s.pubkey, userPubkey, uint(s.boardingExitDelay))
 
 	tapKey, _, err := vtxoScript.TapTree()
 	if err != nil {
-		return "", "", fmt.Errorf("failed to get taproot key: %s", err)
+		return "", nil, fmt.Errorf("failed to get taproot key: %s", err)
 	}
 
 	addr, err := btcutil.NewAddressTaproot(
 		schnorr.SerializePubKey(tapKey), s.chainParams(),
 	)
 	if err != nil {
-		return "", "", fmt.Errorf("failed to get address: %s", err)
+		return "", nil, fmt.Errorf("failed to get address: %s", err)
 	}
 
-	return addr.EncodeAddress(), vtxoScript.ToDescriptor(), nil
+	scripts, err = vtxoScript.Encode()
+	if err != nil {
+		return "", nil, fmt.Errorf("failed to encode vtxo script: %s", err)
+	}
+
+	address = addr.EncodeAddress()
+
+	return
 }
 
 func (s *covenantlessService) SpendNotes(ctx context.Context, notes []note.Note) (string, error) {
@@ -489,8 +491,18 @@ func (s *covenantlessService) SpendVtxos(ctx context.Context, inputs []ports.Inp
 					return "", fmt.Errorf("tx %s not confirmed", input.Txid)
 				}
 
+				vtxoScript, err := bitcointree.ParseVtxoScript(input.Tapscripts)
+				if err != nil {
+					return "", fmt.Errorf("failed to parse boarding descriptor: %s", err)
+				}
+
+				exitDelay, err := vtxoScript.SmallestExitDelay()
+				if err != nil {
+					return "", fmt.Errorf("failed to get exit delay: %s", err)
+				}
+
 				// if the exit path is available, forbid registering the boarding utxo
-				if blocktime+int64(s.boardingExitDelay) < now {
+				if blocktime+int64(exitDelay) < now {
 					return "", fmt.Errorf("tx %s expired", input.Txid)
 				}
 
@@ -520,7 +532,7 @@ func (s *covenantlessService) SpendVtxos(ctx context.Context, inputs []ports.Inp
 			return "", fmt.Errorf("input %s:%d already swept", vtxo.Txid, vtxo.VOut)
 		}
 
-		vtxoScript, err := bitcointree.ParseVtxoScript(input.Descriptor)
+		vtxoScript, err := bitcointree.ParseVtxoScript(input.Tapscripts)
 		if err != nil {
 			return "", fmt.Errorf("failed to parse boarding descriptor: %s", err)
 		}
@@ -559,7 +571,7 @@ func (s *covenantlessService) newBoardingInput(tx wire.MsgTx, input ports.Input)
 
 	output := tx.TxOut[input.VtxoKey.VOut]
 
-	boardingScript, err := bitcointree.ParseVtxoScript(input.Descriptor)
+	boardingScript, err := bitcointree.ParseVtxoScript(input.Tapscripts)
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse boarding descriptor: %s", err)
 	}
@@ -578,16 +590,8 @@ func (s *covenantlessService) newBoardingInput(tx wire.MsgTx, input ports.Input)
 		return nil, fmt.Errorf("descriptor does not match script in transaction output")
 	}
 
-	if defaultVtxoScript, ok := boardingScript.(*bitcointree.DefaultVtxoScript); ok {
-		if !bytes.Equal(schnorr.SerializePubKey(defaultVtxoScript.Asp), schnorr.SerializePubKey(s.pubkey)) {
-			return nil, fmt.Errorf("invalid boarding descriptor, ASP mismatch")
-		}
-
-		if defaultVtxoScript.ExitDelay != uint(s.boardingExitDelay) {
-			return nil, fmt.Errorf("invalid boarding descriptor, timeout mismatch")
-		}
-	} else {
-		return nil, fmt.Errorf("only default vtxo script is supported for boarding")
+	if err := boardingScript.Validate(s.pubkey, uint(s.unilateralExitDelay)); err != nil {
+		return nil, err
 	}
 
 	return &ports.BoardingInput{
@@ -691,15 +695,7 @@ func (s *covenantlessService) GetInfo(ctx context.Context) (*ServiceInfo, error)
 		RoundInterval:       s.roundInterval,
 		Network:             s.network.Name,
 		Dust:                dust,
-		BoardingDescriptorTemplate: fmt.Sprintf(
-			descriptor.DefaultVtxoDescriptorTemplate,
-			hex.EncodeToString(bitcointree.UnspendableKey().SerializeCompressed()),
-			"USER",
-			hex.EncodeToString(schnorr.SerializePubKey(s.pubkey)),
-			s.boardingExitDelay,
-			"USER",
-		),
-		ForfeitAddress: forfeitAddr,
+		ForfeitAddress:      forfeitAddr,
 	}, nil
 }
 
@@ -921,7 +917,7 @@ func (s *covenantlessService) startFinalization() {
 
 	cosigners = append(cosigners, ephemeralKey.PubKey())
 
-	unsignedRoundTx, tree, connectorAddress, connectors, err := s.builder.BuildRoundTx(
+	unsignedRoundTx, vtxoTree, connectorAddress, connectors, err := s.builder.BuildRoundTx(
 		s.pubkey,
 		payments,
 		boardingInputs,
@@ -937,7 +933,7 @@ func (s *covenantlessService) startFinalization() {
 
 	s.forfeitTxs.init(connectors, payments)
 
-	if len(tree) > 0 {
+	if len(vtxoTree) > 0 {
 		log.Debugf("signing congestion tree for round %s", round.Id)
 
 		signingSession := newMusigSigningSession(len(cosigners))
@@ -947,14 +943,14 @@ func (s *covenantlessService) startFinalization() {
 
 		s.currentRound.UnsignedTx = unsignedRoundTx
 		// send back the unsigned tree & all cosigners pubkeys
-		s.propagateRoundSigningStartedEvent(tree, cosigners)
+		s.propagateRoundSigningStartedEvent(vtxoTree, cosigners)
 
-		sweepClosure := bitcointree.CSVSigClosure{
-			Pubkey:  s.pubkey,
-			Seconds: uint(s.roundLifetime),
+		sweepClosure := tree.CSVSigClosure{
+			MultisigClosure: tree.MultisigClosure{PubKeys: []*secp256k1.PublicKey{s.pubkey}},
+			Seconds:         uint(s.roundLifetime),
 		}
 
-		sweepTapLeaf, err := sweepClosure.Leaf()
+		sweepScript, err := sweepClosure.Script()
 		if err != nil {
 			return
 		}
@@ -968,10 +964,11 @@ func (s *covenantlessService) startFinalization() {
 
 		sharedOutputAmount := unsignedPsbt.UnsignedTx.TxOut[0].Value
 
-		sweepTapTree := txscript.AssembleTaprootScriptTree(*sweepTapLeaf)
+		sweepLeaf := txscript.NewBaseTapLeaf(sweepScript)
+		sweepTapTree := txscript.AssembleTaprootScriptTree(sweepLeaf)
 		root := sweepTapTree.RootNode.TapHash()
 
-		coordinator, err := bitcointree.NewTreeCoordinatorSession(sharedOutputAmount, tree, root.CloneBytes(), cosigners)
+		coordinator, err := bitcointree.NewTreeCoordinatorSession(sharedOutputAmount, vtxoTree, root.CloneBytes(), cosigners)
 		if err != nil {
 			round.Fail(fmt.Errorf("failed to create tree coordinator: %s", err))
 			log.WithError(err).Warn("failed to create tree coordinator")
@@ -979,7 +976,7 @@ func (s *covenantlessService) startFinalization() {
 		}
 
 		aspSignerSession := bitcointree.NewTreeSignerSession(
-			ephemeralKey, sharedOutputAmount, tree, root.CloneBytes(),
+			ephemeralKey, sharedOutputAmount, vtxoTree, root.CloneBytes(),
 		)
 
 		nonces, err := aspSignerSession.GetNonces()
@@ -1085,11 +1082,11 @@ func (s *covenantlessService) startFinalization() {
 
 		log.Debugf("congestion tree signed for round %s", round.Id)
 
-		tree = signedTree
+		vtxoTree = signedTree
 	}
 
 	if _, err := round.StartFinalization(
-		connectorAddress, connectors, tree, unsignedRoundTx,
+		connectorAddress, connectors, vtxoTree, unsignedRoundTx,
 	); err != nil {
 		round.Fail(fmt.Errorf("failed to start finalization: %s", err))
 		log.WithError(err).Warn("failed to start finalization")
diff --git a/server/internal/core/application/proof.go b/server/internal/core/application/proof.go
index f497ab9..befc4af 100644
--- a/server/internal/core/application/proof.go
+++ b/server/internal/core/application/proof.go
@@ -24,7 +24,7 @@ type OwnershipProof struct {
 
 func (p OwnershipProof) validate(vtxo domain.Vtxo) error {
 	// verify revealed script and extract user public key
-	pubkey, err := decodeForfeitClosure(p.Script)
+	pubkeys, err := decodeForfeitClosure(p.Script)
 	if err != nil {
 		return err
 	}
@@ -49,24 +49,32 @@ func (p OwnershipProof) validate(vtxo domain.Vtxo) error {
 	outpointBytes := append(txhash[:], voutBytes...)
 	sigMsg := sha256.Sum256(outpointBytes)
 
-	if !p.Signature.Verify(sigMsg[:], pubkey) {
+	valid := false
+	for _, pubkey := range pubkeys {
+		if p.Signature.Verify(sigMsg[:], pubkey) {
+			valid = true
+			break
+		}
+	}
+
+	if !valid {
 		return fmt.Errorf("invalid signature")
 	}
 
 	return nil
 }
 
-func decodeForfeitClosure(script []byte) (*secp256k1.PublicKey, error) {
-	var covenantLessForfeitClosure bitcointree.MultisigClosure
+func decodeForfeitClosure(script []byte) ([]*secp256k1.PublicKey, error) {
+	var forfeit tree.MultisigClosure
 
-	if valid, err := covenantLessForfeitClosure.Decode(script); err == nil && valid {
-		return covenantLessForfeitClosure.Pubkey, nil
+	valid, err := forfeit.Decode(script)
+	if err != nil {
+		return nil, err
 	}
 
-	var covenantForfeitClosure tree.CSVSigClosure
-	if valid, err := covenantForfeitClosure.Decode(script); err == nil && valid {
-		return covenantForfeitClosure.Pubkey, nil
+	if !valid {
+		return nil, fmt.Errorf("invalid forfeit closure script")
 	}
 
-	return nil, fmt.Errorf("invalid forfeit closure script")
+	return forfeit.PubKeys, nil
 }
diff --git a/server/internal/core/application/types.go b/server/internal/core/application/types.go
index edfa6bc..c17e080 100644
--- a/server/internal/core/application/types.go
+++ b/server/internal/core/application/types.go
@@ -45,7 +45,7 @@ type Service interface {
 	) error
 	GetBoardingAddress(
 		ctx context.Context, userPubkey *secp256k1.PublicKey,
-	) (address string, descriptor string, err error)
+	) (address string, scripts []string, err error)
 	// Tree signing methods
 	RegisterCosignerPubkey(ctx context.Context, paymentId string, ephemeralPublicKey string) error
 	RegisterCosignerNonces(
@@ -62,14 +62,13 @@ type Service interface {
 }
 
 type ServiceInfo struct {
-	PubKey                     string
-	RoundLifetime              int64
-	UnilateralExitDelay        int64
-	RoundInterval              int64
-	Network                    string
-	Dust                       uint64
-	BoardingDescriptorTemplate string
-	ForfeitAddress             string
+	PubKey              string
+	RoundLifetime       int64
+	UnilateralExitDelay int64
+	RoundInterval       int64
+	Network             string
+	Dust                uint64
+	ForfeitAddress      string
 }
 
 type WalletStatus struct {
diff --git a/server/internal/core/ports/tx_builder.go b/server/internal/core/ports/tx_builder.go
index 9ce9049..53c195a 100644
--- a/server/internal/core/ports/tx_builder.go
+++ b/server/internal/core/ports/tx_builder.go
@@ -18,7 +18,7 @@ type SweepInput interface {
 
 type Input struct {
 	domain.VtxoKey
-	Descriptor string
+	Tapscripts []string
 }
 
 type BoardingInput struct {
@@ -49,12 +49,12 @@ type TxBuilder interface {
 	BuildSweepTx(inputs []SweepInput) (signedSweepTx string, err error)
 	GetSweepInput(node tree.Node) (lifetime int64, sweepInput SweepInput, err error)
 	FinalizeAndExtract(tx string) (txhex string, err error)
-	VerifyTapscriptPartialSigs(tx string) (valid bool, txid string, err error)
+	VerifyTapscriptPartialSigs(tx string) (valid bool, err error)
 	// FindLeaves returns all the leaves txs that are reachable from the given outpoint
 	FindLeaves(congestionTree tree.CongestionTree, fromtxid string, vout uint32) (leaves []tree.Node, err error)
 	BuildAsyncPaymentTransactions(
 		vtxosToSpend []domain.Vtxo,
-		descriptors map[domain.VtxoKey]string,
+		scripts map[domain.VtxoKey][]string,
 		forfeitsLeaves map[domain.VtxoKey]chainhash.Hash,
 		receivers []domain.Receiver,
 	) (string, error)
diff --git a/server/internal/infrastructure/tx-builder/covenant/builder.go b/server/internal/infrastructure/tx-builder/covenant/builder.go
index c159e5e..909d25a 100644
--- a/server/internal/infrastructure/tx-builder/covenant/builder.go
+++ b/server/internal/infrastructure/tx-builder/covenant/builder.go
@@ -3,6 +3,7 @@ package txbuilder
 import (
 	"bytes"
 	"context"
+	"encoding/hex"
 	"fmt"
 	"math"
 
@@ -11,6 +12,7 @@ import (
 	"github.com/ark-network/ark/server/internal/core/domain"
 	"github.com/ark-network/ark/server/internal/core/ports"
 	"github.com/btcsuite/btcd/btcec/v2/schnorr"
+	"github.com/btcsuite/btcd/btcutil/psbt"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcwallet/waddrmgr"
@@ -122,7 +124,7 @@ func (b *txBuilder) VerifyForfeitTxs(vtxos []domain.Vtxo, connectors []string, f
 			return nil, fmt.Errorf("invalid forfeit tx, expect 2 inputs, got %d", len(pset.Inputs))
 		}
 
-		valid, _, err := b.verifyTapscriptPartialSigs(pset)
+		valid, err := b.verifyTapscriptPartialSigs(pset)
 		if err != nil {
 			return nil, err
 		}
@@ -462,40 +464,66 @@ func (b *txBuilder) GetSweepInput(node tree.Node) (lifetime int64, sweepInput po
 
 	return lifetime, sweepInput, nil
 }
-func (b *txBuilder) VerifyTapscriptPartialSigs(tx string) (bool, string, error) {
+func (b *txBuilder) VerifyTapscriptPartialSigs(tx string) (bool, error) {
 	pset, err := psetv2.NewPsetFromBase64(tx)
 	if err != nil {
-		return false, "", err
+		return false, err
 	}
 
 	return b.verifyTapscriptPartialSigs(pset)
 }
 
-func (b *txBuilder) verifyTapscriptPartialSigs(pset *psetv2.Pset) (bool, string, error) {
+func (b *txBuilder) verifyTapscriptPartialSigs(pset *psetv2.Pset) (bool, error) {
 	utx, _ := pset.UnsignedTx()
 	txid := utx.TxHash().String()
 
+	aspPublicKey, err := b.wallet.GetPubkey(context.Background())
+	if err != nil {
+		return false, err
+	}
+
 	for index, input := range pset.Inputs {
 		if len(input.TapLeafScript) == 0 {
 			continue
 		}
 		if input.WitnessUtxo == nil {
-			return false, txid, fmt.Errorf("missing witness utxo for input %d, cannot verify signature", index)
+			return false, fmt.Errorf("missing witness utxo for input %d, cannot verify signature", index)
 		}
 
 		// verify taproot leaf script
 		tapLeaf := input.TapLeafScript[0]
 
+		closure, err := tree.DecodeClosure(tapLeaf.Script)
+		if err != nil {
+			return false, err
+		}
+
+		keys := make(map[string]bool)
+
+		switch c := closure.(type) {
+		case *tree.MultisigClosure:
+			for _, key := range c.PubKeys {
+				keys[hex.EncodeToString(schnorr.SerializePubKey(key))] = false
+			}
+		case *tree.CSVSigClosure:
+			for _, key := range c.PubKeys {
+				keys[hex.EncodeToString(schnorr.SerializePubKey(key))] = false
+			}
+		}
+
+		// we don't need to check if ASP signed
+		keys[hex.EncodeToString(schnorr.SerializePubKey(aspPublicKey))] = true
+
 		rootHash := tapLeaf.ControlBlock.RootHash(tapLeaf.Script)
 		tapKeyFromControlBlock := taproot.ComputeTaprootOutputKey(tree.UnspendableKey(), rootHash[:])
 
 		pkscript, err := common.P2TRScript(tapKeyFromControlBlock)
 		if err != nil {
-			return false, txid, err
+			return false, err
 		}
 
 		if !bytes.Equal(pkscript, input.WitnessUtxo.Script) {
-			return false, txid, fmt.Errorf("invalid control block for input %d", index)
+			return false, fmt.Errorf("invalid control block for input %d", index)
 		}
 
 		leafHash := taproot.NewBaseTapElementsLeaf(tapLeaf.Script).TapHash()
@@ -506,41 +534,93 @@ func (b *txBuilder) verifyTapscriptPartialSigs(pset *psetv2.Pset) (bool, string,
 			&leafHash,
 		)
 		if err != nil {
-			return false, txid, err
+			return false, err
 		}
 
 		for _, tapScriptSig := range input.TapScriptSig {
 			sig, err := schnorr.ParseSignature(tapScriptSig.Signature)
 			if err != nil {
-				return false, txid, err
+				return false, err
 			}
 
 			pubkey, err := schnorr.ParsePubKey(tapScriptSig.PubKey)
 			if err != nil {
-				return false, txid, err
+				return false, err
 			}
 
 			if !sig.Verify(preimage, pubkey) {
-				return false, txid, fmt.Errorf("invalid signature for tx %s", txid)
+				return false, fmt.Errorf("invalid signature for tx %s", txid)
 			}
+
+			keys[hex.EncodeToString(schnorr.SerializePubKey(pubkey))] = true
+		}
+
+		missingSigs := 0
+		for key := range keys {
+			if !keys[key] {
+				missingSigs++
+			}
+		}
+
+		if missingSigs > 0 {
+			return false, fmt.Errorf("missing %d signatures", missingSigs)
 		}
 	}
 
-	return true, txid, nil
+	return true, nil
 }
 
 func (b *txBuilder) FinalizeAndExtract(tx string) (string, error) {
-	p, err := psetv2.NewPsetFromBase64(tx)
+	ptx, err := psetv2.NewPsetFromBase64(tx)
 	if err != nil {
 		return "", err
 	}
 
-	if err := psetv2.FinalizeAll(p); err != nil {
-		return "", err
+	for i, in := range ptx.Inputs {
+		if in.WitnessUtxo == nil {
+			return "", fmt.Errorf("missing witness utxo, cannot finalize tx")
+		}
+
+		if len(in.TapLeafScript) > 0 {
+			tapLeaf := in.TapLeafScript[0]
+
+			closure, err := tree.DecodeClosure(tapLeaf.Script)
+			if err != nil {
+				return "", err
+			}
+
+			signatures := make(map[string][]byte)
+
+			for _, sig := range in.TapScriptSig {
+				signatures[hex.EncodeToString(sig.PubKey)] = sig.Signature
+			}
+
+			controlBlock, err := tapLeaf.ControlBlock.ToBytes()
+			if err != nil {
+				return "", err
+			}
+
+			witness, err := closure.Witness(controlBlock, signatures)
+			if err != nil {
+				return "", err
+			}
+
+			var witnessBuf bytes.Buffer
+			if err := psbt.WriteTxWitness(&witnessBuf, witness); err != nil {
+				return "", err
+			}
+
+			ptx.Inputs[i].FinalScriptWitness = witnessBuf.Bytes()
+			continue
+		}
+
+		if err := psetv2.Finalize(ptx, i); err != nil {
+			return "", fmt.Errorf("failed to finalize signed pset: %s", err)
+		}
 	}
 
 	// extract the forfeit tx
-	extracted, err := psetv2.Extract(p)
+	extracted, err := psetv2.Extract(ptx)
 	if err != nil {
 		return "", err
 	}
@@ -591,7 +671,7 @@ func (b *txBuilder) FindLeaves(
 
 func (b *txBuilder) BuildAsyncPaymentTransactions(
 	_ []domain.Vtxo,
-	_ map[domain.VtxoKey]string,
+	_ map[domain.VtxoKey][]string,
 	_ map[domain.VtxoKey]chainhash.Hash,
 	_ []domain.Receiver,
 ) (string, error) {
@@ -728,7 +808,7 @@ func (b *txBuilder) createPoolTx(
 			return nil, fmt.Errorf("failed to convert value to bytes: %s", err)
 		}
 
-		boardingVtxoScript, err := tree.ParseVtxoScript(in.Descriptor)
+		boardingVtxoScript, err := tree.ParseVtxoScript(in.Tapscripts)
 		if err != nil {
 			return nil, err
 		}
diff --git a/server/internal/infrastructure/tx-builder/covenantless/builder.go b/server/internal/infrastructure/tx-builder/covenantless/builder.go
index 1b44577..e8c9db1 100644
--- a/server/internal/infrastructure/tx-builder/covenantless/builder.go
+++ b/server/internal/infrastructure/tx-builder/covenantless/builder.go
@@ -23,6 +23,7 @@ import (
 	"github.com/btcsuite/btcwallet/waddrmgr"
 	"github.com/decred/dcrd/dcrec/secp256k1/v4"
 	"github.com/lightningnetwork/lnd/input"
+	"github.com/lightningnetwork/lnd/lntypes"
 )
 
 type txBuilder struct {
@@ -47,47 +48,74 @@ func (b *txBuilder) GetTxID(tx string) (string, error) {
 	return ptx.UnsignedTx.TxHash().String(), nil
 }
 
-func (b *txBuilder) VerifyTapscriptPartialSigs(tx string) (bool, string, error) {
+func (b *txBuilder) VerifyTapscriptPartialSigs(tx string) (bool, error) {
 	ptx, err := psbt.NewFromRawBytes(strings.NewReader(tx), true)
 	if err != nil {
-		return false, "", err
+		return false, err
 	}
 
 	return b.verifyTapscriptPartialSigs(ptx)
 }
 
-func (b *txBuilder) verifyTapscriptPartialSigs(ptx *psbt.Packet) (bool, string, error) {
+func (b *txBuilder) verifyTapscriptPartialSigs(ptx *psbt.Packet) (bool, error) {
 	txid := ptx.UnsignedTx.TxID()
 
+	aspPublicKey, err := b.wallet.GetPubkey(context.Background())
+	if err != nil {
+		return false, err
+	}
+
 	for index, input := range ptx.Inputs {
 		if len(input.TaprootLeafScript) == 0 {
 			continue
 		}
 
 		if input.WitnessUtxo == nil {
-			return false, txid, fmt.Errorf("missing witness utxo for input %d, cannot verify signature", index)
+			return false, fmt.Errorf("missing witness utxo for input %d, cannot verify signature", index)
 		}
 
 		// verify taproot leaf script
 		tapLeaf := input.TaprootLeafScript[0]
+
+		closure, err := tree.DecodeClosure(tapLeaf.Script)
+		if err != nil {
+			return false, err
+		}
+
+		keys := make(map[string]bool)
+
+		switch c := closure.(type) {
+		case *tree.MultisigClosure:
+			for _, key := range c.PubKeys {
+				keys[hex.EncodeToString(schnorr.SerializePubKey(key))] = false
+			}
+		case *tree.CSVSigClosure:
+			for _, key := range c.PubKeys {
+				keys[hex.EncodeToString(schnorr.SerializePubKey(key))] = false
+			}
+		}
+
+		// we don't need to check if ASP signed
+		keys[hex.EncodeToString(schnorr.SerializePubKey(aspPublicKey))] = true
+
 		if len(tapLeaf.ControlBlock) == 0 {
-			return false, txid, fmt.Errorf("missing control block for input %d", index)
+			return false, fmt.Errorf("missing control block for input %d", index)
 		}
 
 		controlBlock, err := txscript.ParseControlBlock(tapLeaf.ControlBlock)
 		if err != nil {
-			return false, txid, err
+			return false, err
 		}
 
 		rootHash := controlBlock.RootHash(tapLeaf.Script)
 		tapKeyFromControlBlock := txscript.ComputeTaprootOutputKey(bitcointree.UnspendableKey(), rootHash[:])
 		pkscript, err := common.P2TRScript(tapKeyFromControlBlock)
 		if err != nil {
-			return false, txid, err
+			return false, err
 		}
 
 		if !bytes.Equal(pkscript, input.WitnessUtxo.PkScript) {
-			return false, txid, fmt.Errorf("invalid control block for input %d", index)
+			return false, fmt.Errorf("invalid control block for input %d", index)
 		}
 
 		preimage, err := b.getTaprootPreimage(
@@ -96,27 +124,40 @@ func (b *txBuilder) verifyTapscriptPartialSigs(ptx *psbt.Packet) (bool, string,
 			tapLeaf.Script,
 		)
 		if err != nil {
-			return false, txid, err
+			return false, err
 		}
 
 		for _, tapScriptSig := range input.TaprootScriptSpendSig {
 			sig, err := schnorr.ParseSignature(tapScriptSig.Signature)
 			if err != nil {
-				return false, txid, err
+				return false, err
 			}
 
 			pubkey, err := schnorr.ParsePubKey(tapScriptSig.XOnlyPubKey)
 			if err != nil {
-				return false, txid, err
+				return false, err
 			}
 
 			if !sig.Verify(preimage, pubkey) {
-				return false, txid, fmt.Errorf("invalid signature for tx %s", txid)
+				return false, fmt.Errorf("invalid signature for tx %s", txid)
 			}
+
+			keys[hex.EncodeToString(schnorr.SerializePubKey(pubkey))] = true
+		}
+
+		missingSigs := 0
+		for key := range keys {
+			if !keys[key] {
+				missingSigs++
+			}
+		}
+
+		if missingSigs > 0 {
+			return false, fmt.Errorf("missing %d signatures", missingSigs)
 		}
 	}
 
-	return true, txid, nil
+	return true, nil
 }
 
 func (b *txBuilder) FinalizeAndExtract(tx string) (string, error) {
@@ -128,47 +169,30 @@ func (b *txBuilder) FinalizeAndExtract(tx string) (string, error) {
 	for i, in := range ptx.Inputs {
 		isTaproot := txscript.IsPayToTaproot(in.WitnessUtxo.PkScript)
 		if isTaproot && len(in.TaprootLeafScript) > 0 {
-			closure, err := bitcointree.DecodeClosure(in.TaprootLeafScript[0].Script)
+			closure, err := tree.DecodeClosure(in.TaprootLeafScript[0].Script)
 			if err != nil {
 				return "", err
 			}
 
-			witness := make(wire.TxWitness, 4)
+			signatures := make(map[string][]byte)
 
-			castClosure, isTaprootMultisig := closure.(*bitcointree.MultisigClosure)
-			if isTaprootMultisig {
-				ownerPubkey := schnorr.SerializePubKey(castClosure.Pubkey)
-				aspKey := schnorr.SerializePubKey(castClosure.AspPubkey)
-
-				for _, sig := range in.TaprootScriptSpendSig {
-					if bytes.Equal(sig.XOnlyPubKey, ownerPubkey) {
-						witness[0] = sig.Signature
-					}
-
-					if bytes.Equal(sig.XOnlyPubKey, aspKey) {
-						witness[1] = sig.Signature
-					}
-				}
-
-				witness[2] = in.TaprootLeafScript[0].Script
-				witness[3] = in.TaprootLeafScript[0].ControlBlock
-
-				for idw, w := range witness {
-					if w == nil {
-						return "", fmt.Errorf("missing witness element %d, cannot finalize taproot mutlisig input %d", idw, i)
-					}
-				}
-
-				var witnessBuf bytes.Buffer
-
-				if err := psbt.WriteTxWitness(&witnessBuf, witness); err != nil {
-					return "", err
-				}
-
-				ptx.Inputs[i].FinalScriptWitness = witnessBuf.Bytes()
-				continue
+			for _, sig := range in.TaprootScriptSpendSig {
+				signatures[hex.EncodeToString(sig.XOnlyPubKey)] = sig.Signature
 			}
 
+			witness, err := closure.Witness(in.TaprootLeafScript[0].ControlBlock, signatures)
+			if err != nil {
+				return "", err
+			}
+
+			var witnessBuf bytes.Buffer
+			if err := psbt.WriteTxWitness(&witnessBuf, witness); err != nil {
+				return "", err
+			}
+
+			ptx.Inputs[i].FinalScriptWitness = witnessBuf.Bytes()
+			continue
+
 		}
 
 		if err := psbt.Finalize(ptx, i); err != nil {
@@ -265,7 +289,7 @@ func (b *txBuilder) VerifyForfeitTxs(vtxos []domain.Vtxo, connectors []string, f
 			return nil, fmt.Errorf("invalid forfeit tx, expect 2 inputs, got %d", len(ptx.Inputs))
 		}
 
-		valid, _, err := b.verifyTapscriptPartialSigs(ptx)
+		valid, err := b.verifyTapscriptPartialSigs(ptx)
 		if err != nil {
 			return nil, err
 		}
@@ -623,7 +647,7 @@ func (b *txBuilder) FindLeaves(congestionTree tree.CongestionTree, fromtxid stri
 
 func (b *txBuilder) BuildAsyncPaymentTransactions(
 	vtxos []domain.Vtxo,
-	descriptors map[domain.VtxoKey]string,
+	scripts map[domain.VtxoKey][]string,
 	forfeitsLeaves map[domain.VtxoKey]chainhash.Hash,
 	receivers []domain.Receiver,
 ) (string, error) {
@@ -638,9 +662,9 @@ func (b *txBuilder) BuildAsyncPaymentTransactions(
 
 	redeemTxWeightEstimator := &input.TxWeightEstimator{}
 	for index, vtxo := range vtxos {
-		desc, ok := descriptors[vtxo.VtxoKey]
+		vtxoTapscripts, ok := scripts[vtxo.VtxoKey]
 		if !ok {
-			return "", fmt.Errorf("missing descriptor for vtxo %s", vtxo.VtxoKey)
+			return "", fmt.Errorf("missing scripts for vtxo %s", vtxo.VtxoKey)
 		}
 
 		forfeitLeafHash, ok := forfeitsLeaves[vtxo.VtxoKey]
@@ -662,7 +686,7 @@ func (b *txBuilder) BuildAsyncPaymentTransactions(
 			Index: vtxo.VOut,
 		}
 
-		vtxoScript, err := bitcointree.ParseVtxoScript(desc)
+		vtxoScript, err := bitcointree.ParseVtxoScript(vtxoTapscripts)
 		if err != nil {
 			return "", err
 		}
@@ -698,7 +722,12 @@ func (b *txBuilder) BuildAsyncPaymentTransactions(
 			return "", err
 		}
 
-		redeemTxWeightEstimator.AddTapscriptInput(64*2+40, &waddrmgr.Tapscript{
+		closure, err := tree.DecodeClosure(leafProof.Script)
+		if err != nil {
+			return "", err
+		}
+
+		redeemTxWeightEstimator.AddTapscriptInput(lntypes.WeightUnit(closure.WitnessSize()), &waddrmgr.Tapscript{
 			RevealedScript: leafProof.Script,
 			ControlBlock:   ctrlBlock,
 		})
@@ -940,7 +969,7 @@ func (b *txBuilder) createRoundTx(
 		})
 		nSequences = append(nSequences, wire.MaxTxInSequenceNum)
 
-		boardingVtxoScript, err := bitcointree.ParseVtxoScript(boardingInput.Descriptor)
+		boardingVtxoScript, err := bitcointree.ParseVtxoScript(boardingInput.Tapscripts)
 		if err != nil {
 			return nil, err
 		}
@@ -1322,7 +1351,7 @@ func castToOutpoints(inputs []ports.TxInput) []ports.TxOutpoint {
 
 func extractSweepLeaf(input psbt.PInput) (sweepLeaf *psbt.TaprootTapLeafScript, internalKey *secp256k1.PublicKey, lifetime int64, err error) {
 	for _, leaf := range input.TaprootLeafScript {
-		closure := &bitcointree.CSVSigClosure{}
+		closure := &tree.CSVSigClosure{}
 		valid, err := closure.Decode(leaf.Script)
 		if err != nil {
 			return nil, nil, 0, err
diff --git a/server/internal/infrastructure/tx-builder/covenantless/sweep.go b/server/internal/infrastructure/tx-builder/covenantless/sweep.go
index f9029c8..2d23582 100644
--- a/server/internal/infrastructure/tx-builder/covenantless/sweep.go
+++ b/server/internal/infrastructure/tx-builder/covenantless/sweep.go
@@ -5,7 +5,7 @@ import (
 	"fmt"
 
 	"github.com/ark-network/ark/common"
-	"github.com/ark-network/ark/common/bitcointree"
+	"github.com/ark-network/ark/common/tree"
 	"github.com/ark-network/ark/server/internal/core/ports"
 	"github.com/btcsuite/btcd/btcec/v2/schnorr"
 	"github.com/btcsuite/btcd/btcutil"
@@ -27,7 +27,7 @@ func sweepTransaction(
 			Index: input.GetIndex(),
 		})
 
-		sweepClosure := bitcointree.CSVSigClosure{}
+		sweepClosure := tree.CSVSigClosure{}
 		valid, err := sweepClosure.Decode(input.GetLeafScript())
 		if err != nil {
 			return nil, err
diff --git a/server/internal/infrastructure/wallet/btc-embedded/wallet.go b/server/internal/infrastructure/wallet/btc-embedded/wallet.go
index 223224d..4388e7a 100644
--- a/server/internal/infrastructure/wallet/btc-embedded/wallet.go
+++ b/server/internal/infrastructure/wallet/btc-embedded/wallet.go
@@ -10,7 +10,7 @@ import (
 	"time"
 
 	"github.com/ark-network/ark/common"
-	"github.com/ark-network/ark/common/bitcointree"
+	"github.com/ark-network/ark/common/tree"
 	"github.com/ark-network/ark/server/internal/core/domain"
 	"github.com/ark-network/ark/server/internal/core/ports"
 	"github.com/btcsuite/btcd/btcec/v2/schnorr"
@@ -745,46 +745,29 @@ func (s *service) SignTransaction(ctx context.Context, partialTx string, extract
 		for i, in := range ptx.Inputs {
 			isTaproot := txscript.IsPayToTaproot(in.WitnessUtxo.PkScript)
 			if isTaproot && len(in.TaprootLeafScript) > 0 {
-				closure, err := bitcointree.DecodeClosure(in.TaprootLeafScript[0].Script)
+				closure, err := tree.DecodeClosure(in.TaprootLeafScript[0].Script)
 				if err != nil {
 					return "", err
 				}
 
-				witness := make(wire.TxWitness, 4)
+				signatures := make(map[string][]byte)
 
-				castClosure, isTaprootMultisig := closure.(*bitcointree.MultisigClosure)
-				if isTaprootMultisig {
-					ownerPubkey := schnorr.SerializePubKey(castClosure.Pubkey)
-					aspKey := schnorr.SerializePubKey(castClosure.AspPubkey)
-
-					for _, sig := range in.TaprootScriptSpendSig {
-						if bytes.Equal(sig.XOnlyPubKey, ownerPubkey) {
-							witness[0] = sig.Signature
-						}
-
-						if bytes.Equal(sig.XOnlyPubKey, aspKey) {
-							witness[1] = sig.Signature
-						}
-					}
-
-					witness[2] = in.TaprootLeafScript[0].Script
-					witness[3] = in.TaprootLeafScript[0].ControlBlock
-
-					for idw, w := range witness {
-						if w == nil {
-							return "", fmt.Errorf("missing witness element %d, cannot finalize taproot mutlisig input %d", idw, i)
-						}
-					}
-
-					var witnessBuf bytes.Buffer
-
-					if err := psbt.WriteTxWitness(&witnessBuf, witness); err != nil {
-						return "", err
-					}
-
-					ptx.Inputs[i].FinalScriptWitness = witnessBuf.Bytes()
-					continue
+				for _, sig := range in.TaprootScriptSpendSig {
+					signatures[hex.EncodeToString(sig.XOnlyPubKey)] = sig.Signature
 				}
+
+				witness, err := closure.Witness(in.TaprootLeafScript[0].ControlBlock, signatures)
+				if err != nil {
+					return "", err
+				}
+
+				var witnessBuf bytes.Buffer
+				if err := psbt.WriteTxWitness(&witnessBuf, witness); err != nil {
+					return "", err
+				}
+
+				ptx.Inputs[i].FinalScriptWitness = witnessBuf.Bytes()
+				continue
 			}
 
 			if err := psbt.Finalize(ptx, i); err != nil {
diff --git a/server/internal/infrastructure/wallet/liquid-standalone/transaction.go b/server/internal/infrastructure/wallet/liquid-standalone/transaction.go
index 81bf981..a857c36 100644
--- a/server/internal/infrastructure/wallet/liquid-standalone/transaction.go
+++ b/server/internal/infrastructure/wallet/liquid-standalone/transaction.go
@@ -12,7 +12,6 @@ import (
 	pb "github.com/ark-network/ark/api-spec/protobuf/gen/ocean/v1"
 	"github.com/ark-network/ark/common/tree"
 	"github.com/ark-network/ark/server/internal/core/ports"
-	"github.com/btcsuite/btcd/btcec/v2/schnorr"
 	"github.com/btcsuite/btcd/btcutil/psbt"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/txscript"
@@ -58,43 +57,29 @@ func (s *service) SignTransaction(
 				return "", err
 			}
 
-			switch c := closure.(type) {
-			case *tree.MultisigClosure:
-				asp := schnorr.SerializePubKey(c.AspPubkey)
-				owner := schnorr.SerializePubKey(c.Pubkey)
+			signatures := make(map[string][]byte)
 
-				witness := make([][]byte, 4)
-				for _, sig := range in.TapScriptSig {
-					if bytes.Equal(sig.PubKey, owner) {
-						witness[0] = sig.Signature
-						continue
-					}
-
-					if bytes.Equal(sig.PubKey, asp) {
-						witness[1] = sig.Signature
-					}
-				}
-
-				witness[2] = tapLeaf.Script
-
-				controlBlock, err := tapLeaf.ControlBlock.ToBytes()
-				if err != nil {
-					return "", err
-				}
-
-				witness[3] = controlBlock
-
-				var witnessBuf bytes.Buffer
-
-				if err := psbt.WriteTxWitness(&witnessBuf, witness); err != nil {
-					return "", err
-				}
-
-				ptx.Inputs[i].FinalScriptWitness = witnessBuf.Bytes()
-				continue
-			default:
-				return "", fmt.Errorf("unexpected closure type %T", c)
+			for _, sig := range in.TapScriptSig {
+				signatures[hex.EncodeToString(sig.PubKey)] = sig.Signature
 			}
+
+			controlBlock, err := tapLeaf.ControlBlock.ToBytes()
+			if err != nil {
+				return "", err
+			}
+
+			witness, err := closure.Witness(controlBlock, signatures)
+			if err != nil {
+				return "", err
+			}
+
+			var witnessBuf bytes.Buffer
+			if err := psbt.WriteTxWitness(&witnessBuf, witness); err != nil {
+				return "", err
+			}
+
+			ptx.Inputs[i].FinalScriptWitness = witnessBuf.Bytes()
+			continue
 		}
 
 		if err := psetv2.Finalize(ptx, i); err != nil {
diff --git a/server/internal/interface/grpc/handlers/arkservice.go b/server/internal/interface/grpc/handlers/arkservice.go
index 0e17634..080ea69 100644
--- a/server/internal/interface/grpc/handlers/arkservice.go
+++ b/server/internal/interface/grpc/handlers/arkservice.go
@@ -3,9 +3,12 @@ package handlers
 import (
 	"context"
 	"encoding/hex"
+	"fmt"
 	"sync"
 
 	arkv1 "github.com/ark-network/ark/api-spec/protobuf/gen/ark/v1"
+	"github.com/ark-network/ark/common/bitcointree"
+	"github.com/ark-network/ark/common/descriptor"
 	"github.com/ark-network/ark/server/internal/core/application"
 	"github.com/ark-network/ark/server/internal/core/domain"
 	"github.com/decred/dcrd/dcrec/secp256k1/v4"
@@ -43,6 +46,15 @@ func (h *handler) GetInfo(
 		return nil, err
 	}
 
+	desc := fmt.Sprintf(
+		descriptor.DefaultVtxoDescriptorTemplate,
+		hex.EncodeToString(bitcointree.UnspendableKey().SerializeCompressed()),
+		"USER",
+		info.PubKey,
+		info.UnilateralExitDelay,
+		info.PubKey,
+	)
+
 	return &arkv1.GetInfoResponse{
 		Pubkey:                     info.PubKey,
 		RoundLifetime:              info.RoundLifetime,
@@ -50,8 +62,9 @@ func (h *handler) GetInfo(
 		RoundInterval:              info.RoundInterval,
 		Network:                    info.Network,
 		Dust:                       int64(info.Dust),
-		BoardingDescriptorTemplate: info.BoardingDescriptorTemplate,
 		ForfeitAddress:             info.ForfeitAddress,
+		BoardingDescriptorTemplate: desc,
+		VtxoDescriptorTemplates:    []string{desc},
 	}, nil
 }
 
@@ -73,14 +86,18 @@ func (h *handler) GetBoardingAddress(
 		return nil, status.Error(codes.InvalidArgument, "invalid pubkey (parse error)")
 	}
 
-	addr, descriptor, err := h.svc.GetBoardingAddress(ctx, userPubkey)
+	addr, tapscripts, err := h.svc.GetBoardingAddress(ctx, userPubkey)
 	if err != nil {
 		return nil, err
 	}
 
 	return &arkv1.GetBoardingAddressResponse{
-		Address:     addr,
-		Descriptor_: descriptor,
+		Address: addr,
+		TaprootTree: &arkv1.GetBoardingAddressResponse_Tapscripts{
+			Tapscripts: &arkv1.Tapscripts{
+				Scripts: tapscripts,
+			},
+		},
 	}, nil
 }
 
diff --git a/server/internal/interface/grpc/handlers/parser.go b/server/internal/interface/grpc/handlers/parser.go
index cac9a90..e3231c8 100644
--- a/server/internal/interface/grpc/handlers/parser.go
+++ b/server/internal/interface/grpc/handlers/parser.go
@@ -43,7 +43,7 @@ func parseAsyncPaymentInputs(ins []*arkv1.AsyncPaymentInput) ([]application.Asyn
 					Txid: input.GetInput().GetOutpoint().GetTxid(),
 					VOut: input.GetInput().GetOutpoint().GetVout(),
 				},
-				Descriptor: input.GetInput().GetDescriptor_(),
+				Tapscripts: input.GetInput().GetTapscripts().GetScripts(),
 			},
 			ForfeitLeafHash: *forfeitLeafHash,
 		})
@@ -82,7 +82,7 @@ func parseInputs(ins []*arkv1.Input) ([]ports.Input, error) {
 				Txid: input.GetOutpoint().GetTxid(),
 				VOut: input.GetOutpoint().GetVout(),
 			},
-			Descriptor: input.GetDescriptor_(),
+			Tapscripts: input.GetTapscripts().GetScripts(),
 		})
 	}