diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index 9c6aa0b1..35eb1ddf 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -2,10 +2,5 @@
 <project version="4">
   <component name="VcsDirectoryMappings">
     <mapping directory="" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/contracts/lib/forge-std" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/contracts/lib/openzeppelin-contracts" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/contracts/lib/openzeppelin-contracts/lib/erc4626-tests" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/contracts/lib/openzeppelin-contracts/lib/forge-std" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/contracts/lib/openzeppelin-contracts/lib/halmos-cheatcodes" vcs="Git" />
   </component>
 </project>
\ No newline at end of file
diff --git a/pkg/api/message/publish_test.go b/pkg/api/message/publish_test.go
index 896db3b6..1eb78888 100644
--- a/pkg/api/message/publish_test.go
+++ b/pkg/api/message/publish_test.go
@@ -122,7 +122,7 @@ func TestKeyPackageValidationSuccess(t *testing.T) {
 	clientEnv := envelopeTestUtils.CreateClientEnvelope(&envelopes.AuthenticatedData{
 		TargetTopic:      topic.NewTopic(topic.TOPIC_KIND_KEY_PACKAGES_V1, []byte{1, 2, 3}).Bytes(),
 		TargetOriginator: 100,
-		LastSeen:         &envelopes.Cursor{},
+		DependsOn:        &envelopes.Cursor{},
 	})
 	clientEnv.Payload = &envelopes.ClientEnvelope_UploadKeyPackage{
 		UploadKeyPackage: &apiv1.UploadKeyPackageRequest{
@@ -161,7 +161,7 @@ func TestKeyPackageValidationFail(t *testing.T) {
 	clientEnv := envelopeTestUtils.CreateClientEnvelope(&envelopes.AuthenticatedData{
 		TargetTopic:      topic.NewTopic(topic.TOPIC_KIND_KEY_PACKAGES_V1, []byte{1, 2, 3}).Bytes(),
 		TargetOriginator: 100,
-		LastSeen:         &envelopes.Cursor{},
+		DependsOn:        &envelopes.Cursor{},
 	})
 	clientEnv.Payload = &envelopes.ClientEnvelope_UploadKeyPackage{
 		UploadKeyPackage: &apiv1.UploadKeyPackageRequest{
diff --git a/pkg/envelopes/envelopes_test.go b/pkg/envelopes/envelopes_test.go
index 8859ffd7..fc66cfd2 100644
--- a/pkg/envelopes/envelopes_test.go
+++ b/pkg/envelopes/envelopes_test.go
@@ -107,7 +107,7 @@ func buildAad(topic *topic.Topic) *envelopesProto.AuthenticatedData {
 	return &envelopesProto.AuthenticatedData{
 		TargetOriginator: 1,
 		TargetTopic:      topic.Bytes(),
-		LastSeen:         &envelopesProto.Cursor{},
+		DependsOn:        &envelopesProto.Cursor{},
 	}
 }
 
diff --git a/pkg/interceptors/server/auth_test.go b/pkg/interceptors/server/auth_test.go
index 5773d1e0..a02085c3 100644
--- a/pkg/interceptors/server/auth_test.go
+++ b/pkg/interceptors/server/auth_test.go
@@ -36,7 +36,7 @@ func TestUnaryInterceptor(t *testing.T) {
 				return metadata.NewIncomingContext(context.Background(), md)
 			},
 			setupVerifier: func() {
-				mockVerifier.EXPECT().Verify("valid_token").Return(nil)
+				mockVerifier.EXPECT().Verify("valid_token").Return(100, nil)
 			},
 			wantError:        nil,
 			wantVerifiedNode: true,
@@ -71,7 +71,7 @@ func TestUnaryInterceptor(t *testing.T) {
 			setupVerifier: func() {
 				mockVerifier.EXPECT().
 					Verify("invalid_token").
-					Return(errors.New("invalid signature"))
+					Return(0, errors.New("invalid signature"))
 			},
 			wantError: status.Error(
 				codes.Unauthenticated,
@@ -131,7 +131,7 @@ func TestStreamInterceptor(t *testing.T) {
 				return metadata.NewIncomingContext(context.Background(), md)
 			},
 			setupVerifier: func() {
-				mockVerifier.EXPECT().Verify("valid_token").Return(nil)
+				mockVerifier.EXPECT().Verify("valid_token").Return(100, nil)
 			},
 			wantError:        nil,
 			wantVerifiedNode: true,
@@ -156,7 +156,7 @@ func TestStreamInterceptor(t *testing.T) {
 			setupVerifier: func() {
 				mockVerifier.EXPECT().
 					Verify("invalid_token").
-					Return(errors.New("invalid signature"))
+					Return(0, errors.New("invalid signature"))
 			},
 			wantError: status.Error(
 				codes.Unauthenticated,
diff --git a/pkg/mocks/authn/mock_JWTVerifier.go b/pkg/mocks/authn/mock_JWTVerifier.go
index c1f35df3..0f335df3 100644
--- a/pkg/mocks/authn/mock_JWTVerifier.go
+++ b/pkg/mocks/authn/mock_JWTVerifier.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.44.1. DO NOT EDIT.
+// Code generated by mockery v2.50.0. DO NOT EDIT.
 
 package authn
 
@@ -25,14 +25,24 @@ func (_m *MockJWTVerifier) Verify(tokenString string) (uint32, error) {
 		panic("no return value specified for Verify")
 	}
 
-	var r0 error
-	if rf, ok := ret.Get(0).(func(string) error); ok {
+	var r0 uint32
+	var r1 error
+	if rf, ok := ret.Get(0).(func(string) (uint32, error)); ok {
+		return rf(tokenString)
+	}
+	if rf, ok := ret.Get(0).(func(string) uint32); ok {
 		r0 = rf(tokenString)
 	} else {
-		r0 = ret.Error(0)
+		r0 = ret.Get(0).(uint32)
+	}
+
+	if rf, ok := ret.Get(1).(func(string) error); ok {
+		r1 = rf(tokenString)
+	} else {
+		r1 = ret.Error(1)
 	}
 
-	return 0, r0
+	return r0, r1
 }
 
 // MockJWTVerifier_Verify_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'Verify'
@@ -53,12 +63,12 @@ func (_c *MockJWTVerifier_Verify_Call) Run(run func(tokenString string)) *MockJW
 	return _c
 }
 
-func (_c *MockJWTVerifier_Verify_Call) Return(_a0 error) *MockJWTVerifier_Verify_Call {
-	_c.Call.Return(_a0)
+func (_c *MockJWTVerifier_Verify_Call) Return(_a0 uint32, _a1 error) *MockJWTVerifier_Verify_Call {
+	_c.Call.Return(_a0, _a1)
 	return _c
 }
 
-func (_c *MockJWTVerifier_Verify_Call) RunAndReturn(run func(string) error) *MockJWTVerifier_Verify_Call {
+func (_c *MockJWTVerifier_Verify_Call) RunAndReturn(run func(string) (uint32, error)) *MockJWTVerifier_Verify_Call {
 	_c.Call.Return(run)
 	return _c
 }
diff --git a/pkg/mocks/blockchain/mock_ChainClient.go b/pkg/mocks/blockchain/mock_ChainClient.go
index b917221e..18e44ecc 100644
--- a/pkg/mocks/blockchain/mock_ChainClient.go
+++ b/pkg/mocks/blockchain/mock_ChainClient.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.44.1. DO NOT EDIT.
+// Code generated by mockery v2.50.0. DO NOT EDIT.
 
 package blockchain
 
diff --git a/pkg/mocks/blockchain/mock_IBlockchainPublisher.go b/pkg/mocks/blockchain/mock_IBlockchainPublisher.go
index 37c1c50f..ec5ee88d 100644
--- a/pkg/mocks/blockchain/mock_IBlockchainPublisher.go
+++ b/pkg/mocks/blockchain/mock_IBlockchainPublisher.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.44.1. DO NOT EDIT.
+// Code generated by mockery v2.50.0. DO NOT EDIT.
 
 package blockchain
 
diff --git a/pkg/mocks/indexer/mock_IBlockTracker.go b/pkg/mocks/indexer/mock_IBlockTracker.go
index 2168ef91..2c434df8 100644
--- a/pkg/mocks/indexer/mock_IBlockTracker.go
+++ b/pkg/mocks/indexer/mock_IBlockTracker.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.44.1. DO NOT EDIT.
+// Code generated by mockery v2.50.0. DO NOT EDIT.
 
 package indexer
 
@@ -21,7 +21,7 @@ func (_m *MockIBlockTracker) EXPECT() *MockIBlockTracker_Expecter {
 	return &MockIBlockTracker_Expecter{mock: &_m.Mock}
 }
 
-// GetLatestBlock provides a mock function with given fields:
+// GetLatestBlock provides a mock function with no fields
 func (_m *MockIBlockTracker) GetLatestBlock() (uint64, []byte) {
 	ret := _m.Called()
 
diff --git a/pkg/mocks/mls_validationv1/mock_ValidationApiClient.go b/pkg/mocks/mls_validationv1/mock_ValidationApiClient.go
index 6c48ac00..6b94b6e2 100644
--- a/pkg/mocks/mls_validationv1/mock_ValidationApiClient.go
+++ b/pkg/mocks/mls_validationv1/mock_ValidationApiClient.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.44.1. DO NOT EDIT.
+// Code generated by mockery v2.50.0. DO NOT EDIT.
 
 package mls_validationv1
 
@@ -249,154 +249,6 @@ func (_c *MockValidationApiClient_ValidateInboxIdKeyPackages_Call) RunAndReturn(
 	return _c
 }
 
-// ValidateInboxIds provides a mock function with given fields: ctx, in, opts
-func (_m *MockValidationApiClient) ValidateInboxIds(ctx context.Context, in *mls_validationv1.ValidateInboxIdsRequest, opts ...grpc.CallOption) (*mls_validationv1.ValidateInboxIdsResponse, error) {
-	_va := make([]interface{}, len(opts))
-	for _i := range opts {
-		_va[_i] = opts[_i]
-	}
-	var _ca []interface{}
-	_ca = append(_ca, ctx, in)
-	_ca = append(_ca, _va...)
-	ret := _m.Called(_ca...)
-
-	if len(ret) == 0 {
-		panic("no return value specified for ValidateInboxIds")
-	}
-
-	var r0 *mls_validationv1.ValidateInboxIdsResponse
-	var r1 error
-	if rf, ok := ret.Get(0).(func(context.Context, *mls_validationv1.ValidateInboxIdsRequest, ...grpc.CallOption) (*mls_validationv1.ValidateInboxIdsResponse, error)); ok {
-		return rf(ctx, in, opts...)
-	}
-	if rf, ok := ret.Get(0).(func(context.Context, *mls_validationv1.ValidateInboxIdsRequest, ...grpc.CallOption) *mls_validationv1.ValidateInboxIdsResponse); ok {
-		r0 = rf(ctx, in, opts...)
-	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(*mls_validationv1.ValidateInboxIdsResponse)
-		}
-	}
-
-	if rf, ok := ret.Get(1).(func(context.Context, *mls_validationv1.ValidateInboxIdsRequest, ...grpc.CallOption) error); ok {
-		r1 = rf(ctx, in, opts...)
-	} else {
-		r1 = ret.Error(1)
-	}
-
-	return r0, r1
-}
-
-// MockValidationApiClient_ValidateInboxIds_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'ValidateInboxIds'
-type MockValidationApiClient_ValidateInboxIds_Call struct {
-	*mock.Call
-}
-
-// ValidateInboxIds is a helper method to define mock.On call
-//   - ctx context.Context
-//   - in *mls_validationv1.ValidateInboxIdsRequest
-//   - opts ...grpc.CallOption
-func (_e *MockValidationApiClient_Expecter) ValidateInboxIds(ctx interface{}, in interface{}, opts ...interface{}) *MockValidationApiClient_ValidateInboxIds_Call {
-	return &MockValidationApiClient_ValidateInboxIds_Call{Call: _e.mock.On("ValidateInboxIds",
-		append([]interface{}{ctx, in}, opts...)...)}
-}
-
-func (_c *MockValidationApiClient_ValidateInboxIds_Call) Run(run func(ctx context.Context, in *mls_validationv1.ValidateInboxIdsRequest, opts ...grpc.CallOption)) *MockValidationApiClient_ValidateInboxIds_Call {
-	_c.Call.Run(func(args mock.Arguments) {
-		variadicArgs := make([]grpc.CallOption, len(args)-2)
-		for i, a := range args[2:] {
-			if a != nil {
-				variadicArgs[i] = a.(grpc.CallOption)
-			}
-		}
-		run(args[0].(context.Context), args[1].(*mls_validationv1.ValidateInboxIdsRequest), variadicArgs...)
-	})
-	return _c
-}
-
-func (_c *MockValidationApiClient_ValidateInboxIds_Call) Return(_a0 *mls_validationv1.ValidateInboxIdsResponse, _a1 error) *MockValidationApiClient_ValidateInboxIds_Call {
-	_c.Call.Return(_a0, _a1)
-	return _c
-}
-
-func (_c *MockValidationApiClient_ValidateInboxIds_Call) RunAndReturn(run func(context.Context, *mls_validationv1.ValidateInboxIdsRequest, ...grpc.CallOption) (*mls_validationv1.ValidateInboxIdsResponse, error)) *MockValidationApiClient_ValidateInboxIds_Call {
-	_c.Call.Return(run)
-	return _c
-}
-
-// ValidateKeyPackages provides a mock function with given fields: ctx, in, opts
-func (_m *MockValidationApiClient) ValidateKeyPackages(ctx context.Context, in *mls_validationv1.ValidateKeyPackagesRequest, opts ...grpc.CallOption) (*mls_validationv1.ValidateKeyPackagesResponse, error) {
-	_va := make([]interface{}, len(opts))
-	for _i := range opts {
-		_va[_i] = opts[_i]
-	}
-	var _ca []interface{}
-	_ca = append(_ca, ctx, in)
-	_ca = append(_ca, _va...)
-	ret := _m.Called(_ca...)
-
-	if len(ret) == 0 {
-		panic("no return value specified for ValidateKeyPackages")
-	}
-
-	var r0 *mls_validationv1.ValidateKeyPackagesResponse
-	var r1 error
-	if rf, ok := ret.Get(0).(func(context.Context, *mls_validationv1.ValidateKeyPackagesRequest, ...grpc.CallOption) (*mls_validationv1.ValidateKeyPackagesResponse, error)); ok {
-		return rf(ctx, in, opts...)
-	}
-	if rf, ok := ret.Get(0).(func(context.Context, *mls_validationv1.ValidateKeyPackagesRequest, ...grpc.CallOption) *mls_validationv1.ValidateKeyPackagesResponse); ok {
-		r0 = rf(ctx, in, opts...)
-	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(*mls_validationv1.ValidateKeyPackagesResponse)
-		}
-	}
-
-	if rf, ok := ret.Get(1).(func(context.Context, *mls_validationv1.ValidateKeyPackagesRequest, ...grpc.CallOption) error); ok {
-		r1 = rf(ctx, in, opts...)
-	} else {
-		r1 = ret.Error(1)
-	}
-
-	return r0, r1
-}
-
-// MockValidationApiClient_ValidateKeyPackages_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'ValidateKeyPackages'
-type MockValidationApiClient_ValidateKeyPackages_Call struct {
-	*mock.Call
-}
-
-// ValidateKeyPackages is a helper method to define mock.On call
-//   - ctx context.Context
-//   - in *mls_validationv1.ValidateKeyPackagesRequest
-//   - opts ...grpc.CallOption
-func (_e *MockValidationApiClient_Expecter) ValidateKeyPackages(ctx interface{}, in interface{}, opts ...interface{}) *MockValidationApiClient_ValidateKeyPackages_Call {
-	return &MockValidationApiClient_ValidateKeyPackages_Call{Call: _e.mock.On("ValidateKeyPackages",
-		append([]interface{}{ctx, in}, opts...)...)}
-}
-
-func (_c *MockValidationApiClient_ValidateKeyPackages_Call) Run(run func(ctx context.Context, in *mls_validationv1.ValidateKeyPackagesRequest, opts ...grpc.CallOption)) *MockValidationApiClient_ValidateKeyPackages_Call {
-	_c.Call.Run(func(args mock.Arguments) {
-		variadicArgs := make([]grpc.CallOption, len(args)-2)
-		for i, a := range args[2:] {
-			if a != nil {
-				variadicArgs[i] = a.(grpc.CallOption)
-			}
-		}
-		run(args[0].(context.Context), args[1].(*mls_validationv1.ValidateKeyPackagesRequest), variadicArgs...)
-	})
-	return _c
-}
-
-func (_c *MockValidationApiClient_ValidateKeyPackages_Call) Return(_a0 *mls_validationv1.ValidateKeyPackagesResponse, _a1 error) *MockValidationApiClient_ValidateKeyPackages_Call {
-	_c.Call.Return(_a0, _a1)
-	return _c
-}
-
-func (_c *MockValidationApiClient_ValidateKeyPackages_Call) RunAndReturn(run func(context.Context, *mls_validationv1.ValidateKeyPackagesRequest, ...grpc.CallOption) (*mls_validationv1.ValidateKeyPackagesResponse, error)) *MockValidationApiClient_ValidateKeyPackages_Call {
-	_c.Call.Return(run)
-	return _c
-}
-
 // VerifySmartContractWalletSignatures provides a mock function with given fields: ctx, in, opts
 func (_m *MockValidationApiClient) VerifySmartContractWalletSignatures(ctx context.Context, in *apiv1.VerifySmartContractWalletSignaturesRequest, opts ...grpc.CallOption) (*apiv1.VerifySmartContractWalletSignaturesResponse, error) {
 	_va := make([]interface{}, len(opts))
diff --git a/pkg/mocks/mlsvalidate/mock_MLSValidationService.go b/pkg/mocks/mlsvalidate/mock_MLSValidationService.go
index 212e4cc0..18e1f389 100644
--- a/pkg/mocks/mlsvalidate/mock_MLSValidationService.go
+++ b/pkg/mocks/mlsvalidate/mock_MLSValidationService.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.44.1. DO NOT EDIT.
+// Code generated by mockery v2.50.0. DO NOT EDIT.
 
 package mlsvalidate
 
diff --git a/pkg/mocks/registry/mock_NodeRegistry.go b/pkg/mocks/registry/mock_NodeRegistry.go
index 0684ae01..859fa6ea 100644
--- a/pkg/mocks/registry/mock_NodeRegistry.go
+++ b/pkg/mocks/registry/mock_NodeRegistry.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.44.1. DO NOT EDIT.
+// Code generated by mockery v2.50.0. DO NOT EDIT.
 
 package registry
 
@@ -78,7 +78,7 @@ func (_c *MockNodeRegistry_GetNode_Call) RunAndReturn(run func(uint32) (*registr
 	return _c
 }
 
-// GetNodes provides a mock function with given fields:
+// GetNodes provides a mock function with no fields
 func (_m *MockNodeRegistry) GetNodes() ([]registry.Node, error) {
 	ret := _m.Called()
 
@@ -195,7 +195,7 @@ func (_c *MockNodeRegistry_OnChangedNode_Call) RunAndReturn(run func(uint32) (<-
 	return _c
 }
 
-// OnNewNodes provides a mock function with given fields:
+// OnNewNodes provides a mock function with no fields
 func (_m *MockNodeRegistry) OnNewNodes() (<-chan []registry.Node, registry.CancelSubscription) {
 	ret := _m.Called()
 
@@ -254,7 +254,7 @@ func (_c *MockNodeRegistry_OnNewNodes_Call) RunAndReturn(run func() (<-chan []re
 	return _c
 }
 
-// Stop provides a mock function with given fields:
+// Stop provides a mock function with no fields
 func (_m *MockNodeRegistry) Stop() {
 	_m.Called()
 }
@@ -282,7 +282,7 @@ func (_c *MockNodeRegistry_Stop_Call) Return() *MockNodeRegistry_Stop_Call {
 }
 
 func (_c *MockNodeRegistry_Stop_Call) RunAndReturn(run func()) *MockNodeRegistry_Stop_Call {
-	_c.Call.Return(run)
+	_c.Run(run)
 	return _c
 }
 
diff --git a/pkg/mocks/registry/mock_NodesContract.go b/pkg/mocks/registry/mock_NodesContract.go
index 1027ee3f..8fbc70ff 100644
--- a/pkg/mocks/registry/mock_NodesContract.go
+++ b/pkg/mocks/registry/mock_NodesContract.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.44.1. DO NOT EDIT.
+// Code generated by mockery v2.50.0. DO NOT EDIT.
 
 package registry
 
diff --git a/pkg/mocks/storer/mock_LogStorer.go b/pkg/mocks/storer/mock_LogStorer.go
index 516a6d96..cc9f8112 100644
--- a/pkg/mocks/storer/mock_LogStorer.go
+++ b/pkg/mocks/storer/mock_LogStorer.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.44.1. DO NOT EDIT.
+// Code generated by mockery v2.50.0. DO NOT EDIT.
 
 package storer
 
diff --git a/pkg/proto/mls_validation/v1/service.pb.go b/pkg/proto/mls_validation/v1/service.pb.go
index 295b0365..41377a58 100644
--- a/pkg/proto/mls_validation/v1/service.pb.go
+++ b/pkg/proto/mls_validation/v1/service.pb.go
@@ -403,98 +403,6 @@ func (x *GetAssociationStateResponse) GetStateDiff() *associations.AssociationSt
 	return nil
 }
 
-// Request to validate an InboxID with the backend service. Ensures an Inbox Id <> Installation key are valid.
-type ValidateInboxIdsRequest struct {
-	state protoimpl.MessageState `protogen:"open.v1"`
-	// list of validation requests
-	Requests      []*ValidateInboxIdsRequest_ValidationRequest `protobuf:"bytes,1,rep,name=requests,proto3" json:"requests,omitempty"`
-	unknownFields protoimpl.UnknownFields
-	sizeCache     protoimpl.SizeCache
-}
-
-func (x *ValidateInboxIdsRequest) Reset() {
-	*x = ValidateInboxIdsRequest{}
-	mi := &file_mls_validation_v1_service_proto_msgTypes[8]
-	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-	ms.StoreMessageInfo(mi)
-}
-
-func (x *ValidateInboxIdsRequest) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*ValidateInboxIdsRequest) ProtoMessage() {}
-
-func (x *ValidateInboxIdsRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_mls_validation_v1_service_proto_msgTypes[8]
-	if x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use ValidateInboxIdsRequest.ProtoReflect.Descriptor instead.
-func (*ValidateInboxIdsRequest) Descriptor() ([]byte, []int) {
-	return file_mls_validation_v1_service_proto_rawDescGZIP(), []int{8}
-}
-
-func (x *ValidateInboxIdsRequest) GetRequests() []*ValidateInboxIdsRequest_ValidationRequest {
-	if x != nil {
-		return x.Requests
-	}
-	return nil
-}
-
-// Response to ValidateInboxIdRequest
-type ValidateInboxIdsResponse struct {
-	state protoimpl.MessageState `protogen:"open.v1"`
-	// List of validation responses
-	Responses     []*ValidateInboxIdsResponse_ValidationResponse `protobuf:"bytes,1,rep,name=responses,proto3" json:"responses,omitempty"`
-	unknownFields protoimpl.UnknownFields
-	sizeCache     protoimpl.SizeCache
-}
-
-func (x *ValidateInboxIdsResponse) Reset() {
-	*x = ValidateInboxIdsResponse{}
-	mi := &file_mls_validation_v1_service_proto_msgTypes[9]
-	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-	ms.StoreMessageInfo(mi)
-}
-
-func (x *ValidateInboxIdsResponse) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*ValidateInboxIdsResponse) ProtoMessage() {}
-
-func (x *ValidateInboxIdsResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_mls_validation_v1_service_proto_msgTypes[9]
-	if x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use ValidateInboxIdsResponse.ProtoReflect.Descriptor instead.
-func (*ValidateInboxIdsResponse) Descriptor() ([]byte, []int) {
-	return file_mls_validation_v1_service_proto_rawDescGZIP(), []int{9}
-}
-
-func (x *ValidateInboxIdsResponse) GetResponses() []*ValidateInboxIdsResponse_ValidationResponse {
-	if x != nil {
-		return x.Responses
-	}
-	return nil
-}
-
 // Wrapper for each key package
 type ValidateInboxIdKeyPackagesRequest_KeyPackage struct {
 	state                        protoimpl.MessageState `protogen:"open.v1"`
@@ -506,7 +414,7 @@ type ValidateInboxIdKeyPackagesRequest_KeyPackage struct {
 
 func (x *ValidateInboxIdKeyPackagesRequest_KeyPackage) Reset() {
 	*x = ValidateInboxIdKeyPackagesRequest_KeyPackage{}
-	mi := &file_mls_validation_v1_service_proto_msgTypes[10]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[8]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -518,7 +426,7 @@ func (x *ValidateInboxIdKeyPackagesRequest_KeyPackage) String() string {
 func (*ValidateInboxIdKeyPackagesRequest_KeyPackage) ProtoMessage() {}
 
 func (x *ValidateInboxIdKeyPackagesRequest_KeyPackage) ProtoReflect() protoreflect.Message {
-	mi := &file_mls_validation_v1_service_proto_msgTypes[10]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[8]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -562,7 +470,7 @@ type ValidateInboxIdKeyPackagesResponse_Response struct {
 
 func (x *ValidateInboxIdKeyPackagesResponse_Response) Reset() {
 	*x = ValidateInboxIdKeyPackagesResponse_Response{}
-	mi := &file_mls_validation_v1_service_proto_msgTypes[11]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[9]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -574,7 +482,7 @@ func (x *ValidateInboxIdKeyPackagesResponse_Response) String() string {
 func (*ValidateInboxIdKeyPackagesResponse_Response) ProtoMessage() {}
 
 func (x *ValidateInboxIdKeyPackagesResponse_Response) ProtoReflect() protoreflect.Message {
-	mi := &file_mls_validation_v1_service_proto_msgTypes[11]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[9]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -636,7 +544,7 @@ type ValidateKeyPackagesRequest_KeyPackage struct {
 
 func (x *ValidateKeyPackagesRequest_KeyPackage) Reset() {
 	*x = ValidateKeyPackagesRequest_KeyPackage{}
-	mi := &file_mls_validation_v1_service_proto_msgTypes[12]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[10]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -648,7 +556,7 @@ func (x *ValidateKeyPackagesRequest_KeyPackage) String() string {
 func (*ValidateKeyPackagesRequest_KeyPackage) ProtoMessage() {}
 
 func (x *ValidateKeyPackagesRequest_KeyPackage) ProtoReflect() protoreflect.Message {
-	mi := &file_mls_validation_v1_service_proto_msgTypes[12]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[10]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -693,7 +601,7 @@ type ValidateKeyPackagesResponse_ValidationResponse struct {
 
 func (x *ValidateKeyPackagesResponse_ValidationResponse) Reset() {
 	*x = ValidateKeyPackagesResponse_ValidationResponse{}
-	mi := &file_mls_validation_v1_service_proto_msgTypes[13]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[11]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -705,7 +613,7 @@ func (x *ValidateKeyPackagesResponse_ValidationResponse) String() string {
 func (*ValidateKeyPackagesResponse_ValidationResponse) ProtoMessage() {}
 
 func (x *ValidateKeyPackagesResponse_ValidationResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_mls_validation_v1_service_proto_msgTypes[13]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[11]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -773,7 +681,7 @@ type ValidateGroupMessagesRequest_GroupMessage struct {
 
 func (x *ValidateGroupMessagesRequest_GroupMessage) Reset() {
 	*x = ValidateGroupMessagesRequest_GroupMessage{}
-	mi := &file_mls_validation_v1_service_proto_msgTypes[14]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[12]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -785,7 +693,7 @@ func (x *ValidateGroupMessagesRequest_GroupMessage) String() string {
 func (*ValidateGroupMessagesRequest_GroupMessage) ProtoMessage() {}
 
 func (x *ValidateGroupMessagesRequest_GroupMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_mls_validation_v1_service_proto_msgTypes[14]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[12]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -820,7 +728,7 @@ type ValidateGroupMessagesResponse_ValidationResponse struct {
 
 func (x *ValidateGroupMessagesResponse_ValidationResponse) Reset() {
 	*x = ValidateGroupMessagesResponse_ValidationResponse{}
-	mi := &file_mls_validation_v1_service_proto_msgTypes[15]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[13]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -832,7 +740,7 @@ func (x *ValidateGroupMessagesResponse_ValidationResponse) String() string {
 func (*ValidateGroupMessagesResponse_ValidationResponse) ProtoMessage() {}
 
 func (x *ValidateGroupMessagesResponse_ValidationResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_mls_validation_v1_service_proto_msgTypes[15]
+	mi := &file_mls_validation_v1_service_proto_msgTypes[13]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -869,128 +777,6 @@ func (x *ValidateGroupMessagesResponse_ValidationResponse) GetGroupId() string {
 	return ""
 }
 
-// a single validation request
-type ValidateInboxIdsRequest_ValidationRequest struct {
-	state                 protoimpl.MessageState         `protogen:"open.v1"`
-	Credential            *identity.MlsCredential        `protobuf:"bytes,1,opt,name=credential,proto3" json:"credential,omitempty"`
-	InstallationPublicKey []byte                         `protobuf:"bytes,2,opt,name=installation_public_key,json=installationPublicKey,proto3" json:"installation_public_key,omitempty"`
-	IdentityUpdates       []*associations.IdentityUpdate `protobuf:"bytes,3,rep,name=identity_updates,json=identityUpdates,proto3" json:"identity_updates,omitempty"`
-	unknownFields         protoimpl.UnknownFields
-	sizeCache             protoimpl.SizeCache
-}
-
-func (x *ValidateInboxIdsRequest_ValidationRequest) Reset() {
-	*x = ValidateInboxIdsRequest_ValidationRequest{}
-	mi := &file_mls_validation_v1_service_proto_msgTypes[16]
-	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-	ms.StoreMessageInfo(mi)
-}
-
-func (x *ValidateInboxIdsRequest_ValidationRequest) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*ValidateInboxIdsRequest_ValidationRequest) ProtoMessage() {}
-
-func (x *ValidateInboxIdsRequest_ValidationRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_mls_validation_v1_service_proto_msgTypes[16]
-	if x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use ValidateInboxIdsRequest_ValidationRequest.ProtoReflect.Descriptor instead.
-func (*ValidateInboxIdsRequest_ValidationRequest) Descriptor() ([]byte, []int) {
-	return file_mls_validation_v1_service_proto_rawDescGZIP(), []int{8, 0}
-}
-
-func (x *ValidateInboxIdsRequest_ValidationRequest) GetCredential() *identity.MlsCredential {
-	if x != nil {
-		return x.Credential
-	}
-	return nil
-}
-
-func (x *ValidateInboxIdsRequest_ValidationRequest) GetInstallationPublicKey() []byte {
-	if x != nil {
-		return x.InstallationPublicKey
-	}
-	return nil
-}
-
-func (x *ValidateInboxIdsRequest_ValidationRequest) GetIdentityUpdates() []*associations.IdentityUpdate {
-	if x != nil {
-		return x.IdentityUpdates
-	}
-	return nil
-}
-
-// a single validation response
-type ValidateInboxIdsResponse_ValidationResponse struct {
-	state         protoimpl.MessageState `protogen:"open.v1"`
-	IsOk          bool                   `protobuf:"varint,1,opt,name=is_ok,json=isOk,proto3" json:"is_ok,omitempty"`
-	ErrorMessage  string                 `protobuf:"bytes,2,opt,name=error_message,json=errorMessage,proto3" json:"error_message,omitempty"`
-	InboxId       string                 `protobuf:"bytes,3,opt,name=inbox_id,json=inboxId,proto3" json:"inbox_id,omitempty"`
-	unknownFields protoimpl.UnknownFields
-	sizeCache     protoimpl.SizeCache
-}
-
-func (x *ValidateInboxIdsResponse_ValidationResponse) Reset() {
-	*x = ValidateInboxIdsResponse_ValidationResponse{}
-	mi := &file_mls_validation_v1_service_proto_msgTypes[17]
-	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-	ms.StoreMessageInfo(mi)
-}
-
-func (x *ValidateInboxIdsResponse_ValidationResponse) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*ValidateInboxIdsResponse_ValidationResponse) ProtoMessage() {}
-
-func (x *ValidateInboxIdsResponse_ValidationResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_mls_validation_v1_service_proto_msgTypes[17]
-	if x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use ValidateInboxIdsResponse_ValidationResponse.ProtoReflect.Descriptor instead.
-func (*ValidateInboxIdsResponse_ValidationResponse) Descriptor() ([]byte, []int) {
-	return file_mls_validation_v1_service_proto_rawDescGZIP(), []int{9, 0}
-}
-
-func (x *ValidateInboxIdsResponse_ValidationResponse) GetIsOk() bool {
-	if x != nil {
-		return x.IsOk
-	}
-	return false
-}
-
-func (x *ValidateInboxIdsResponse_ValidationResponse) GetErrorMessage() string {
-	if x != nil {
-		return x.ErrorMessage
-	}
-	return ""
-}
-
-func (x *ValidateInboxIdsResponse_ValidationResponse) GetInboxId() string {
-	if x != nil {
-		return x.InboxId
-	}
-	return ""
-}
-
 var File_mls_validation_v1_service_proto protoreflect.FileDescriptor
 
 var file_mls_validation_v1_service_proto_rawDesc = []byte{
@@ -1139,112 +925,59 @@ var file_mls_validation_v1_service_proto_rawDesc = []byte{
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 }
 
 var (
@@ -1259,7 +992,7 @@ func file_mls_validation_v1_service_proto_rawDescGZIP() []byte {
 	return file_mls_validation_v1_service_proto_rawDescData
 }
 
-var file_mls_validation_v1_service_proto_msgTypes = make([]protoimpl.MessageInfo, 18)
+var file_mls_validation_v1_service_proto_msgTypes = make([]protoimpl.MessageInfo, 14)
 var file_mls_validation_v1_service_proto_goTypes = []any{
 	(*ValidateInboxIdKeyPackagesRequest)(nil),                // 0: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesRequest
 	(*ValidateInboxIdKeyPackagesResponse)(nil),               // 1: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse
@@ -1269,56 +1002,44 @@ var file_mls_validation_v1_service_proto_goTypes = []any{
 	(*ValidateGroupMessagesResponse)(nil),                    // 5: xmtp.mls_validation.v1.ValidateGroupMessagesResponse
 	(*GetAssociationStateRequest)(nil),                       // 6: xmtp.mls_validation.v1.GetAssociationStateRequest
 	(*GetAssociationStateResponse)(nil),                      // 7: xmtp.mls_validation.v1.GetAssociationStateResponse
-	(*ValidateInboxIdsRequest)(nil),                          // 8: xmtp.mls_validation.v1.ValidateInboxIdsRequest
-	(*ValidateInboxIdsResponse)(nil),                         // 9: xmtp.mls_validation.v1.ValidateInboxIdsResponse
-	(*ValidateInboxIdKeyPackagesRequest_KeyPackage)(nil),     // 10: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesRequest.KeyPackage
-	(*ValidateInboxIdKeyPackagesResponse_Response)(nil),      // 11: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse.Response
-	(*ValidateKeyPackagesRequest_KeyPackage)(nil),            // 12: xmtp.mls_validation.v1.ValidateKeyPackagesRequest.KeyPackage
-	(*ValidateKeyPackagesResponse_ValidationResponse)(nil),   // 13: xmtp.mls_validation.v1.ValidateKeyPackagesResponse.ValidationResponse
-	(*ValidateGroupMessagesRequest_GroupMessage)(nil),        // 14: xmtp.mls_validation.v1.ValidateGroupMessagesRequest.GroupMessage
-	(*ValidateGroupMessagesResponse_ValidationResponse)(nil), // 15: xmtp.mls_validation.v1.ValidateGroupMessagesResponse.ValidationResponse
-	(*ValidateInboxIdsRequest_ValidationRequest)(nil),        // 16: xmtp.mls_validation.v1.ValidateInboxIdsRequest.ValidationRequest
-	(*ValidateInboxIdsResponse_ValidationResponse)(nil),      // 17: xmtp.mls_validation.v1.ValidateInboxIdsResponse.ValidationResponse
-	(*associations.IdentityUpdate)(nil),                      // 18: xmtp.identity.associations.IdentityUpdate
-	(*associations.AssociationState)(nil),                    // 19: xmtp.identity.associations.AssociationState
-	(*associations.AssociationStateDiff)(nil),                // 20: xmtp.identity.associations.AssociationStateDiff
-	(*identity.MlsCredential)(nil),                           // 21: xmtp.identity.MlsCredential
-	(*v1.VerifySmartContractWalletSignaturesRequest)(nil),    // 22: xmtp.identity.api.v1.VerifySmartContractWalletSignaturesRequest
-	(*v1.VerifySmartContractWalletSignaturesResponse)(nil),   // 23: xmtp.identity.api.v1.VerifySmartContractWalletSignaturesResponse
+	(*ValidateInboxIdKeyPackagesRequest_KeyPackage)(nil),     // 8: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesRequest.KeyPackage
+	(*ValidateInboxIdKeyPackagesResponse_Response)(nil),      // 9: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse.Response
+	(*ValidateKeyPackagesRequest_KeyPackage)(nil),            // 10: xmtp.mls_validation.v1.ValidateKeyPackagesRequest.KeyPackage
+	(*ValidateKeyPackagesResponse_ValidationResponse)(nil),   // 11: xmtp.mls_validation.v1.ValidateKeyPackagesResponse.ValidationResponse
+	(*ValidateGroupMessagesRequest_GroupMessage)(nil),        // 12: xmtp.mls_validation.v1.ValidateGroupMessagesRequest.GroupMessage
+	(*ValidateGroupMessagesResponse_ValidationResponse)(nil), // 13: xmtp.mls_validation.v1.ValidateGroupMessagesResponse.ValidationResponse
+	(*associations.IdentityUpdate)(nil),                      // 14: xmtp.identity.associations.IdentityUpdate
+	(*associations.AssociationState)(nil),                    // 15: xmtp.identity.associations.AssociationState
+	(*associations.AssociationStateDiff)(nil),                // 16: xmtp.identity.associations.AssociationStateDiff
+	(*identity.MlsCredential)(nil),                           // 17: xmtp.identity.MlsCredential
+	(*v1.VerifySmartContractWalletSignaturesRequest)(nil),    // 18: xmtp.identity.api.v1.VerifySmartContractWalletSignaturesRequest
+	(*v1.VerifySmartContractWalletSignaturesResponse)(nil),   // 19: xmtp.identity.api.v1.VerifySmartContractWalletSignaturesResponse
 }
 var file_mls_validation_v1_service_proto_depIdxs = []int32{
-	10, // 0: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesRequest.key_packages:type_name -> xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesRequest.KeyPackage
-	11, // 1: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse.responses:type_name -> xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse.Response
-	12, // 2: xmtp.mls_validation.v1.ValidateKeyPackagesRequest.key_packages:type_name -> xmtp.mls_validation.v1.ValidateKeyPackagesRequest.KeyPackage
-	13, // 3: xmtp.mls_validation.v1.ValidateKeyPackagesResponse.responses:type_name -> xmtp.mls_validation.v1.ValidateKeyPackagesResponse.ValidationResponse
-	14, // 4: xmtp.mls_validation.v1.ValidateGroupMessagesRequest.group_messages:type_name -> xmtp.mls_validation.v1.ValidateGroupMessagesRequest.GroupMessage
-	15, // 5: xmtp.mls_validation.v1.ValidateGroupMessagesResponse.responses:type_name -> xmtp.mls_validation.v1.ValidateGroupMessagesResponse.ValidationResponse
-	18, // 6: xmtp.mls_validation.v1.GetAssociationStateRequest.old_updates:type_name -> xmtp.identity.associations.IdentityUpdate
-	18, // 7: xmtp.mls_validation.v1.GetAssociationStateRequest.new_updates:type_name -> xmtp.identity.associations.IdentityUpdate
-	19, // 8: xmtp.mls_validation.v1.GetAssociationStateResponse.association_state:type_name -> xmtp.identity.associations.AssociationState
-	20, // 9: xmtp.mls_validation.v1.GetAssociationStateResponse.state_diff:type_name -> xmtp.identity.associations.AssociationStateDiff
-	16, // 10: xmtp.mls_validation.v1.ValidateInboxIdsRequest.requests:type_name -> xmtp.mls_validation.v1.ValidateInboxIdsRequest.ValidationRequest
-	17, // 11: xmtp.mls_validation.v1.ValidateInboxIdsResponse.responses:type_name -> xmtp.mls_validation.v1.ValidateInboxIdsResponse.ValidationResponse
-	21, // 12: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse.Response.credential:type_name -> xmtp.identity.MlsCredential
-	21, // 13: xmtp.mls_validation.v1.ValidateInboxIdsRequest.ValidationRequest.credential:type_name -> xmtp.identity.MlsCredential
-	18, // 14: xmtp.mls_validation.v1.ValidateInboxIdsRequest.ValidationRequest.identity_updates:type_name -> xmtp.identity.associations.IdentityUpdate
-	2,  // 15: xmtp.mls_validation.v1.ValidationApi.ValidateKeyPackages:input_type -> xmtp.mls_validation.v1.ValidateKeyPackagesRequest
-	4,  // 16: xmtp.mls_validation.v1.ValidationApi.ValidateGroupMessages:input_type -> xmtp.mls_validation.v1.ValidateGroupMessagesRequest
-	6,  // 17: xmtp.mls_validation.v1.ValidationApi.GetAssociationState:input_type -> xmtp.mls_validation.v1.GetAssociationStateRequest
-	2,  // 18: xmtp.mls_validation.v1.ValidationApi.ValidateInboxIdKeyPackages:input_type -> xmtp.mls_validation.v1.ValidateKeyPackagesRequest
-	8,  // 19: xmtp.mls_validation.v1.ValidationApi.ValidateInboxIds:input_type -> xmtp.mls_validation.v1.ValidateInboxIdsRequest
-	22, // 20: xmtp.mls_validation.v1.ValidationApi.VerifySmartContractWalletSignatures:input_type -> xmtp.identity.api.v1.VerifySmartContractWalletSignaturesRequest
-	3,  // 21: xmtp.mls_validation.v1.ValidationApi.ValidateKeyPackages:output_type -> xmtp.mls_validation.v1.ValidateKeyPackagesResponse
-	5,  // 22: xmtp.mls_validation.v1.ValidationApi.ValidateGroupMessages:output_type -> xmtp.mls_validation.v1.ValidateGroupMessagesResponse
-	7,  // 23: xmtp.mls_validation.v1.ValidationApi.GetAssociationState:output_type -> xmtp.mls_validation.v1.GetAssociationStateResponse
-	1,  // 24: xmtp.mls_validation.v1.ValidationApi.ValidateInboxIdKeyPackages:output_type -> xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse
-	9,  // 25: xmtp.mls_validation.v1.ValidationApi.ValidateInboxIds:output_type -> xmtp.mls_validation.v1.ValidateInboxIdsResponse
-	23, // 26: xmtp.mls_validation.v1.ValidationApi.VerifySmartContractWalletSignatures:output_type -> xmtp.identity.api.v1.VerifySmartContractWalletSignaturesResponse
-	21, // [21:27] is the sub-list for method output_type
-	15, // [15:21] is the sub-list for method input_type
-	15, // [15:15] is the sub-list for extension type_name
-	15, // [15:15] is the sub-list for extension extendee
-	0,  // [0:15] is the sub-list for field type_name
+	8,  // 0: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesRequest.key_packages:type_name -> xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesRequest.KeyPackage
+	9,  // 1: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse.responses:type_name -> xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse.Response
+	10, // 2: xmtp.mls_validation.v1.ValidateKeyPackagesRequest.key_packages:type_name -> xmtp.mls_validation.v1.ValidateKeyPackagesRequest.KeyPackage
+	11, // 3: xmtp.mls_validation.v1.ValidateKeyPackagesResponse.responses:type_name -> xmtp.mls_validation.v1.ValidateKeyPackagesResponse.ValidationResponse
+	12, // 4: xmtp.mls_validation.v1.ValidateGroupMessagesRequest.group_messages:type_name -> xmtp.mls_validation.v1.ValidateGroupMessagesRequest.GroupMessage
+	13, // 5: xmtp.mls_validation.v1.ValidateGroupMessagesResponse.responses:type_name -> xmtp.mls_validation.v1.ValidateGroupMessagesResponse.ValidationResponse
+	14, // 6: xmtp.mls_validation.v1.GetAssociationStateRequest.old_updates:type_name -> xmtp.identity.associations.IdentityUpdate
+	14, // 7: xmtp.mls_validation.v1.GetAssociationStateRequest.new_updates:type_name -> xmtp.identity.associations.IdentityUpdate
+	15, // 8: xmtp.mls_validation.v1.GetAssociationStateResponse.association_state:type_name -> xmtp.identity.associations.AssociationState
+	16, // 9: xmtp.mls_validation.v1.GetAssociationStateResponse.state_diff:type_name -> xmtp.identity.associations.AssociationStateDiff
+	17, // 10: xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse.Response.credential:type_name -> xmtp.identity.MlsCredential
+	4,  // 11: xmtp.mls_validation.v1.ValidationApi.ValidateGroupMessages:input_type -> xmtp.mls_validation.v1.ValidateGroupMessagesRequest
+	6,  // 12: xmtp.mls_validation.v1.ValidationApi.GetAssociationState:input_type -> xmtp.mls_validation.v1.GetAssociationStateRequest
+	2,  // 13: xmtp.mls_validation.v1.ValidationApi.ValidateInboxIdKeyPackages:input_type -> xmtp.mls_validation.v1.ValidateKeyPackagesRequest
+	18, // 14: xmtp.mls_validation.v1.ValidationApi.VerifySmartContractWalletSignatures:input_type -> xmtp.identity.api.v1.VerifySmartContractWalletSignaturesRequest
+	5,  // 15: xmtp.mls_validation.v1.ValidationApi.ValidateGroupMessages:output_type -> xmtp.mls_validation.v1.ValidateGroupMessagesResponse
+	7,  // 16: xmtp.mls_validation.v1.ValidationApi.GetAssociationState:output_type -> xmtp.mls_validation.v1.GetAssociationStateResponse
+	1,  // 17: xmtp.mls_validation.v1.ValidationApi.ValidateInboxIdKeyPackages:output_type -> xmtp.mls_validation.v1.ValidateInboxIdKeyPackagesResponse
+	19, // 18: xmtp.mls_validation.v1.ValidationApi.VerifySmartContractWalletSignatures:output_type -> xmtp.identity.api.v1.VerifySmartContractWalletSignaturesResponse
+	15, // [15:19] is the sub-list for method output_type
+	11, // [11:15] is the sub-list for method input_type
+	11, // [11:11] is the sub-list for extension type_name
+	11, // [11:11] is the sub-list for extension extendee
+	0,  // [0:11] is the sub-list for field type_name
 }
 
 func init() { file_mls_validation_v1_service_proto_init() }
@@ -1332,7 +1053,7 @@ func file_mls_validation_v1_service_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_mls_validation_v1_service_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   18,
+			NumMessages:   14,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/pkg/proto/mls_validation/v1/service_grpc.pb.go b/pkg/proto/mls_validation/v1/service_grpc.pb.go
index c874583e..cdb2db54 100644
--- a/pkg/proto/mls_validation/v1/service_grpc.pb.go
+++ b/pkg/proto/mls_validation/v1/service_grpc.pb.go
@@ -22,11 +22,9 @@ import (
 const _ = grpc.SupportPackageIsVersion7
 
 const (
-	ValidationApi_ValidateKeyPackages_FullMethodName                 = "/xmtp.mls_validation.v1.ValidationApi/ValidateKeyPackages"
 	ValidationApi_ValidateGroupMessages_FullMethodName               = "/xmtp.mls_validation.v1.ValidationApi/ValidateGroupMessages"
 	ValidationApi_GetAssociationState_FullMethodName                 = "/xmtp.mls_validation.v1.ValidationApi/GetAssociationState"
 	ValidationApi_ValidateInboxIdKeyPackages_FullMethodName          = "/xmtp.mls_validation.v1.ValidationApi/ValidateInboxIdKeyPackages"
-	ValidationApi_ValidateInboxIds_FullMethodName                    = "/xmtp.mls_validation.v1.ValidationApi/ValidateInboxIds"
 	ValidationApi_VerifySmartContractWalletSignatures_FullMethodName = "/xmtp.mls_validation.v1.ValidationApi/VerifySmartContractWalletSignatures"
 )
 
@@ -34,8 +32,6 @@ const (
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type ValidationApiClient interface {
-	// Validates and parses a batch of key packages and returns relevant details
-	ValidateKeyPackages(ctx context.Context, in *ValidateKeyPackagesRequest, opts ...grpc.CallOption) (*ValidateKeyPackagesResponse, error)
 	// Validates and parses a group message and returns relevant details
 	ValidateGroupMessages(ctx context.Context, in *ValidateGroupMessagesRequest, opts ...grpc.CallOption) (*ValidateGroupMessagesResponse, error)
 	// Gets the final association state for a batch of identity updates
@@ -43,11 +39,8 @@ type ValidationApiClient interface {
 	// Validates InboxID key packages and returns credential information for them, without checking
 	// whether an InboxId <> InstallationPublicKey pair is really valid.
 	ValidateInboxIdKeyPackages(ctx context.Context, in *ValidateKeyPackagesRequest, opts ...grpc.CallOption) (*ValidateInboxIdKeyPackagesResponse, error)
-	// Validate an InboxID Key Package
-	// need public key possibly
-	ValidateInboxIds(ctx context.Context, in *ValidateInboxIdsRequest, opts ...grpc.CallOption) (*ValidateInboxIdsResponse, error)
 	// Verifies smart contracts
-	// This request is proxied from the node, so we'll reuse those messgaes.
+	// This request is proxied from the node, so we'll reuse those messages.
 	VerifySmartContractWalletSignatures(ctx context.Context, in *v1.VerifySmartContractWalletSignaturesRequest, opts ...grpc.CallOption) (*v1.VerifySmartContractWalletSignaturesResponse, error)
 }
 
@@ -59,15 +52,6 @@ func NewValidationApiClient(cc grpc.ClientConnInterface) ValidationApiClient {
 	return &validationApiClient{cc}
 }
 
-func (c *validationApiClient) ValidateKeyPackages(ctx context.Context, in *ValidateKeyPackagesRequest, opts ...grpc.CallOption) (*ValidateKeyPackagesResponse, error) {
-	out := new(ValidateKeyPackagesResponse)
-	err := c.cc.Invoke(ctx, ValidationApi_ValidateKeyPackages_FullMethodName, in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
 func (c *validationApiClient) ValidateGroupMessages(ctx context.Context, in *ValidateGroupMessagesRequest, opts ...grpc.CallOption) (*ValidateGroupMessagesResponse, error) {
 	out := new(ValidateGroupMessagesResponse)
 	err := c.cc.Invoke(ctx, ValidationApi_ValidateGroupMessages_FullMethodName, in, out, opts...)
@@ -95,15 +79,6 @@ func (c *validationApiClient) ValidateInboxIdKeyPackages(ctx context.Context, in
 	return out, nil
 }
 
-func (c *validationApiClient) ValidateInboxIds(ctx context.Context, in *ValidateInboxIdsRequest, opts ...grpc.CallOption) (*ValidateInboxIdsResponse, error) {
-	out := new(ValidateInboxIdsResponse)
-	err := c.cc.Invoke(ctx, ValidationApi_ValidateInboxIds_FullMethodName, in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
 func (c *validationApiClient) VerifySmartContractWalletSignatures(ctx context.Context, in *v1.VerifySmartContractWalletSignaturesRequest, opts ...grpc.CallOption) (*v1.VerifySmartContractWalletSignaturesResponse, error) {
 	out := new(v1.VerifySmartContractWalletSignaturesResponse)
 	err := c.cc.Invoke(ctx, ValidationApi_VerifySmartContractWalletSignatures_FullMethodName, in, out, opts...)
@@ -117,8 +92,6 @@ func (c *validationApiClient) VerifySmartContractWalletSignatures(ctx context.Co
 // All implementations must embed UnimplementedValidationApiServer
 // for forward compatibility
 type ValidationApiServer interface {
-	// Validates and parses a batch of key packages and returns relevant details
-	ValidateKeyPackages(context.Context, *ValidateKeyPackagesRequest) (*ValidateKeyPackagesResponse, error)
 	// Validates and parses a group message and returns relevant details
 	ValidateGroupMessages(context.Context, *ValidateGroupMessagesRequest) (*ValidateGroupMessagesResponse, error)
 	// Gets the final association state for a batch of identity updates
@@ -126,11 +99,8 @@ type ValidationApiServer interface {
 	// Validates InboxID key packages and returns credential information for them, without checking
 	// whether an InboxId <> InstallationPublicKey pair is really valid.
 	ValidateInboxIdKeyPackages(context.Context, *ValidateKeyPackagesRequest) (*ValidateInboxIdKeyPackagesResponse, error)
-	// Validate an InboxID Key Package
-	// need public key possibly
-	ValidateInboxIds(context.Context, *ValidateInboxIdsRequest) (*ValidateInboxIdsResponse, error)
 	// Verifies smart contracts
-	// This request is proxied from the node, so we'll reuse those messgaes.
+	// This request is proxied from the node, so we'll reuse those messages.
 	VerifySmartContractWalletSignatures(context.Context, *v1.VerifySmartContractWalletSignaturesRequest) (*v1.VerifySmartContractWalletSignaturesResponse, error)
 	mustEmbedUnimplementedValidationApiServer()
 }
@@ -139,9 +109,6 @@ type ValidationApiServer interface {
 type UnimplementedValidationApiServer struct {
 }
 
-func (UnimplementedValidationApiServer) ValidateKeyPackages(context.Context, *ValidateKeyPackagesRequest) (*ValidateKeyPackagesResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method ValidateKeyPackages not implemented")
-}
 func (UnimplementedValidationApiServer) ValidateGroupMessages(context.Context, *ValidateGroupMessagesRequest) (*ValidateGroupMessagesResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method ValidateGroupMessages not implemented")
 }
@@ -151,9 +118,6 @@ func (UnimplementedValidationApiServer) GetAssociationState(context.Context, *Ge
 func (UnimplementedValidationApiServer) ValidateInboxIdKeyPackages(context.Context, *ValidateKeyPackagesRequest) (*ValidateInboxIdKeyPackagesResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method ValidateInboxIdKeyPackages not implemented")
 }
-func (UnimplementedValidationApiServer) ValidateInboxIds(context.Context, *ValidateInboxIdsRequest) (*ValidateInboxIdsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method ValidateInboxIds not implemented")
-}
 func (UnimplementedValidationApiServer) VerifySmartContractWalletSignatures(context.Context, *v1.VerifySmartContractWalletSignaturesRequest) (*v1.VerifySmartContractWalletSignaturesResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method VerifySmartContractWalletSignatures not implemented")
 }
@@ -170,24 +134,6 @@ func RegisterValidationApiServer(s grpc.ServiceRegistrar, srv ValidationApiServe
 	s.RegisterService(&ValidationApi_ServiceDesc, srv)
 }
 
-func _ValidationApi_ValidateKeyPackages_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(ValidateKeyPackagesRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ValidationApiServer).ValidateKeyPackages(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: ValidationApi_ValidateKeyPackages_FullMethodName,
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ValidationApiServer).ValidateKeyPackages(ctx, req.(*ValidateKeyPackagesRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
 func _ValidationApi_ValidateGroupMessages_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(ValidateGroupMessagesRequest)
 	if err := dec(in); err != nil {
@@ -242,24 +188,6 @@ func _ValidationApi_ValidateInboxIdKeyPackages_Handler(srv interface{}, ctx cont
 	return interceptor(ctx, in, info, handler)
 }
 
-func _ValidationApi_ValidateInboxIds_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(ValidateInboxIdsRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(ValidationApiServer).ValidateInboxIds(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: ValidationApi_ValidateInboxIds_FullMethodName,
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ValidationApiServer).ValidateInboxIds(ctx, req.(*ValidateInboxIdsRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
 func _ValidationApi_VerifySmartContractWalletSignatures_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(v1.VerifySmartContractWalletSignaturesRequest)
 	if err := dec(in); err != nil {
@@ -285,10 +213,6 @@ var ValidationApi_ServiceDesc = grpc.ServiceDesc{
 	ServiceName: "xmtp.mls_validation.v1.ValidationApi",
 	HandlerType: (*ValidationApiServer)(nil),
 	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "ValidateKeyPackages",
-			Handler:    _ValidationApi_ValidateKeyPackages_Handler,
-		},
 		{
 			MethodName: "ValidateGroupMessages",
 			Handler:    _ValidationApi_ValidateGroupMessages_Handler,
@@ -301,10 +225,6 @@ var ValidationApi_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "ValidateInboxIdKeyPackages",
 			Handler:    _ValidationApi_ValidateInboxIdKeyPackages_Handler,
 		},
-		{
-			MethodName: "ValidateInboxIds",
-			Handler:    _ValidationApi_ValidateInboxIds_Handler,
-		},
 		{
 			MethodName: "VerifySmartContractWalletSignatures",
 			Handler:    _ValidationApi_VerifySmartContractWalletSignatures_Handler,
diff --git a/pkg/proto/openapi/mls_validation/v1/service.swagger.json b/pkg/proto/openapi/mls_validation/v1/service.swagger.json
index d1bb324c..eedeb6de 100644
--- a/pkg/proto/openapi/mls_validation/v1/service.swagger.json
+++ b/pkg/proto/openapi/mls_validation/v1/service.swagger.json
@@ -49,26 +49,6 @@
       },
       "description": "ECDSA signature bytes and the recovery bit\nproduced by xmtp-js::PublicKey.signWithWallet function, i.e.\nEIP-191 signature of a \"Create Identity\" message with the key embedded.\nUsed to sign identity keys."
     },
-    "ValidateInboxIdsRequestValidationRequest": {
-      "type": "object",
-      "properties": {
-        "credential": {
-          "$ref": "#/definitions/identityMlsCredential"
-        },
-        "installationPublicKey": {
-          "type": "string",
-          "format": "byte"
-        },
-        "identityUpdates": {
-          "type": "array",
-          "items": {
-            "type": "object",
-            "$ref": "#/definitions/associationsIdentityUpdate"
-          }
-        }
-      },
-      "title": "a single validation request"
-    },
     "associationsAddAssociation": {
       "type": "object",
       "properties": {
@@ -469,35 +449,6 @@
       },
       "title": "one response corresponding to information about one key package"
     },
-    "v1ValidateInboxIdsResponse": {
-      "type": "object",
-      "properties": {
-        "responses": {
-          "type": "array",
-          "items": {
-            "type": "object",
-            "$ref": "#/definitions/v1ValidateInboxIdsResponseValidationResponse"
-          },
-          "title": "List of validation responses"
-        }
-      },
-      "title": "Response to ValidateInboxIdRequest"
-    },
-    "v1ValidateInboxIdsResponseValidationResponse": {
-      "type": "object",
-      "properties": {
-        "isOk": {
-          "type": "boolean"
-        },
-        "errorMessage": {
-          "type": "string"
-        },
-        "inboxId": {
-          "type": "string"
-        }
-      },
-      "title": "a single validation response"
-    },
     "v1ValidateKeyPackagesRequestKeyPackage": {
       "type": "object",
       "properties": {
@@ -511,46 +462,6 @@
       },
       "title": "Wrapper for each key package"
     },
-    "v1ValidateKeyPackagesResponse": {
-      "type": "object",
-      "properties": {
-        "responses": {
-          "type": "array",
-          "items": {
-            "type": "object",
-            "$ref": "#/definitions/v1ValidateKeyPackagesResponseValidationResponse"
-          }
-        }
-      },
-      "title": "Response to ValidateKeyPackagesRequest"
-    },
-    "v1ValidateKeyPackagesResponseValidationResponse": {
-      "type": "object",
-      "properties": {
-        "isOk": {
-          "type": "boolean"
-        },
-        "errorMessage": {
-          "type": "string"
-        },
-        "installationId": {
-          "type": "string",
-          "format": "byte"
-        },
-        "accountAddress": {
-          "type": "string"
-        },
-        "credentialIdentityBytes": {
-          "type": "string",
-          "format": "byte"
-        },
-        "expiration": {
-          "type": "string",
-          "format": "uint64"
-        }
-      },
-      "title": "An individual response to one key package"
-    },
     "v1VerifySmartContractWalletSignatureRequestSignature": {
       "type": "object",
       "properties": {
diff --git a/pkg/proto/openapi/xmtpv4/payer_api/payer_api.swagger.json b/pkg/proto/openapi/xmtpv4/payer_api/payer_api.swagger.json
index 9bf5130d..c6945aee 100644
--- a/pkg/proto/openapi/xmtpv4/payer_api/payer_api.swagger.json
+++ b/pkg/proto/openapi/xmtpv4/payer_api/payer_api.swagger.json
@@ -260,7 +260,7 @@
           "type": "string",
           "format": "byte"
         },
-        "lastSeen": {
+        "dependsOn": {
           "$ref": "#/definitions/xmtpv4envelopesCursor"
         }
       },
diff --git a/pkg/proto/xmtpv4/envelopes/envelopes.pb.go b/pkg/proto/xmtpv4/envelopes/envelopes.pb.go
index d6b35971..43099c58 100644
--- a/pkg/proto/xmtpv4/envelopes/envelopes.pb.go
+++ b/pkg/proto/xmtpv4/envelopes/envelopes.pb.go
@@ -74,7 +74,7 @@ type AuthenticatedData struct {
 	state            protoimpl.MessageState `protogen:"open.v1"`
 	TargetOriginator uint32                 `protobuf:"varint,1,opt,name=target_originator,json=targetOriginator,proto3" json:"target_originator,omitempty"`
 	TargetTopic      []byte                 `protobuf:"bytes,2,opt,name=target_topic,json=targetTopic,proto3" json:"target_topic,omitempty"`
-	LastSeen         *Cursor                `protobuf:"bytes,3,opt,name=last_seen,json=lastSeen,proto3" json:"last_seen,omitempty"`
+	DependsOn        *Cursor                `protobuf:"bytes,3,opt,name=depends_on,json=dependsOn,proto3" json:"depends_on,omitempty"`
 	unknownFields    protoimpl.UnknownFields
 	sizeCache        protoimpl.SizeCache
 }
@@ -123,9 +123,9 @@ func (x *AuthenticatedData) GetTargetTopic() []byte {
 	return nil
 }
 
-func (x *AuthenticatedData) GetLastSeen() *Cursor {
+func (x *AuthenticatedData) GetDependsOn() *Cursor {
 	if x != nil {
-		return x.LastSeen
+		return x.DependsOn
 	}
 	return nil
 }
@@ -534,106 +534,106 @@ var file_xmtpv4_envelopes_envelopes_proto_rawDesc = []byte{
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 }
 
 var (
@@ -666,7 +666,7 @@ var file_xmtpv4_envelopes_envelopes_proto_goTypes = []any{
 }
 var file_xmtpv4_envelopes_envelopes_proto_depIdxs = []int32{
 	7,  // 0: xmtp.xmtpv4.envelopes.Cursor.node_id_to_sequence_id:type_name -> xmtp.xmtpv4.envelopes.Cursor.NodeIdToSequenceIdEntry
-	0,  // 1: xmtp.xmtpv4.envelopes.AuthenticatedData.last_seen:type_name -> xmtp.xmtpv4.envelopes.Cursor
+	0,  // 1: xmtp.xmtpv4.envelopes.AuthenticatedData.depends_on:type_name -> xmtp.xmtpv4.envelopes.Cursor
 	1,  // 2: xmtp.xmtpv4.envelopes.ClientEnvelope.aad:type_name -> xmtp.xmtpv4.envelopes.AuthenticatedData
 	8,  // 3: xmtp.xmtpv4.envelopes.ClientEnvelope.group_message:type_name -> xmtp.mls.api.v1.GroupMessageInput
 	9,  // 4: xmtp.xmtpv4.envelopes.ClientEnvelope.welcome_message:type_name -> xmtp.mls.api.v1.WelcomeMessageInput
diff --git a/pkg/server/server_test.go b/pkg/server/server_test.go
index 59ad9bb6..aa1b63d4 100644
--- a/pkg/server/server_test.go
+++ b/pkg/server/server_test.go
@@ -156,7 +156,7 @@ func TestCreateServer(t *testing.T) {
 				envelopeTestUtils.CreateClientEnvelope(&envelopes.AuthenticatedData{
 					TargetOriginator: server1NodeID,
 					TargetTopic:      targetTopic,
-					LastSeen:         &envelopes.Cursor{},
+					DependsOn:        &envelopes.Cursor{},
 				}),
 			)},
 		},
@@ -170,7 +170,7 @@ func TestCreateServer(t *testing.T) {
 				envelopeTestUtils.CreateClientEnvelope(&envelopes.AuthenticatedData{
 					TargetOriginator: server2NodeID,
 					TargetTopic:      targetTopic,
-					LastSeen:         &envelopes.Cursor{},
+					DependsOn:        &envelopes.Cursor{},
 				}),
 			)},
 		},
@@ -257,7 +257,7 @@ func TestReadOwnWritesGuarantee(t *testing.T) {
 				envelopeTestUtils.CreateClientEnvelope(&envelopes.AuthenticatedData{
 					TargetOriginator: server1NodeID,
 					TargetTopic:      targetTopic,
-					LastSeen:         &envelopes.Cursor{},
+					DependsOn:        &envelopes.Cursor{},
 				}),
 			)},
 		},
diff --git a/pkg/testutils/envelopes/envelopes.go b/pkg/testutils/envelopes/envelopes.go
index fe819179..14197473 100644
--- a/pkg/testutils/envelopes/envelopes.go
+++ b/pkg/testutils/envelopes/envelopes.go
@@ -30,7 +30,7 @@ func CreateClientEnvelope(aad ...*envelopes.AuthenticatedData) *envelopes.Client
 			TargetOriginator: 100,
 			TargetTopic: topic.NewTopic(topic.TOPIC_KIND_GROUP_MESSAGES_V1, []byte{1, 2, 3}).
 				Bytes(),
-			LastSeen: &envelopes.Cursor{},
+			DependsOn: &envelopes.Cursor{},
 		})
 	}
 	return &envelopes.ClientEnvelope{
@@ -130,7 +130,7 @@ func CreateOriginatorEnvelopeWithTopic(
 		&envelopes.AuthenticatedData{
 			TargetTopic:      topic,
 			TargetOriginator: originatorNodeID,
-			LastSeen:         nil,
+			DependsOn:        nil,
 		},
 	))