diff --git a/Makefile b/Makefile
index 8ca6886db..95b510964 100644
--- a/Makefile
+++ b/Makefile
@@ -68,9 +68,9 @@ proto-all: proto-gen proto-lint proto-check-breaking
 .PHONY: proto-all
 
 proto-gen:
-	@docker pull -q ostracondev/docker-build-proto
+	@docker pull -q tendermintdev/docker-build-proto
 	@echo "Generating Protobuf files"
-	@docker run -v $(shell pwd):/workspace --workdir /workspace ostracondev/docker-build-proto sh ./scripts/protocgen.sh
+	@docker run -v $(shell pwd):/workspace --workdir /workspace tendermintdev/docker-build-proto sh ./scripts/protocgen.sh
 .PHONY: proto-gen
 
 proto-lint:
diff --git a/abci/client/client.go b/abci/client/client.go
index dd3b8a8b6..48ac778cc 100644
--- a/abci/client/client.go
+++ b/abci/client/client.go
@@ -9,6 +9,7 @@ import (
 	tmsync "github.com/line/ostracon/libs/sync"
 )
 
+//go:generate mockery --case underscore --name Client
 const (
 	dialRetryIntervalSeconds = 3
 	echoRetryIntervalSeconds = 1
@@ -36,6 +37,8 @@ type Client interface {
 	InitChainAsync(types.RequestInitChain) *ReqRes
 	BeginBlockAsync(types.RequestBeginBlock) *ReqRes
 	EndBlockAsync(types.RequestEndBlock) *ReqRes
+	BeginRecheckTxAsync(types.RequestBeginRecheckTx) *ReqRes
+	EndRecheckTxAsync(types.RequestEndRecheckTx) *ReqRes
 	ListSnapshotsAsync(types.RequestListSnapshots) *ReqRes
 	OfferSnapshotAsync(types.RequestOfferSnapshot) *ReqRes
 	LoadSnapshotChunkAsync(types.RequestLoadSnapshotChunk) *ReqRes
@@ -52,6 +55,8 @@ type Client interface {
 	InitChainSync(types.RequestInitChain) (*types.ResponseInitChain, error)
 	BeginBlockSync(types.RequestBeginBlock) (*types.ResponseBeginBlock, error)
 	EndBlockSync(types.RequestEndBlock) (*types.ResponseEndBlock, error)
+	BeginRecheckTxSync(types.RequestBeginRecheckTx) (*types.ResponseBeginRecheckTx, error)
+	EndRecheckTxSync(types.RequestEndRecheckTx) (*types.ResponseEndRecheckTx, error)
 	ListSnapshotsSync(types.RequestListSnapshots) (*types.ResponseListSnapshots, error)
 	OfferSnapshotSync(types.RequestOfferSnapshot) (*types.ResponseOfferSnapshot, error)
 	LoadSnapshotChunkSync(types.RequestLoadSnapshotChunk) (*types.ResponseLoadSnapshotChunk, error)
diff --git a/abci/client/grpc_client.go b/abci/client/grpc_client.go
index a041c6523..605cb72a3 100644
--- a/abci/client/grpc_client.go
+++ b/abci/client/grpc_client.go
@@ -266,6 +266,24 @@ func (cli *grpcClient) EndBlockAsync(params types.RequestEndBlock) *ReqRes {
 	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_EndBlock{EndBlock: res}})
 }
 
+func (cli *grpcClient) BeginRecheckTxAsync(params types.RequestBeginRecheckTx) *ReqRes {
+	req := types.ToRequestBeginRecheckTx(params)
+	res, err := cli.client.BeginRecheckTx(context.Background(), req.GetBeginRecheckTx(), grpc.WaitForReady(true))
+	if err != nil {
+		cli.StopForError(err)
+	}
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_BeginRecheckTx{BeginRecheckTx: res}})
+}
+
+func (cli *grpcClient) EndRecheckTxAsync(params types.RequestEndRecheckTx) *ReqRes {
+	req := types.ToRequestEndRecheckTx(params)
+	res, err := cli.client.EndRecheckTx(context.Background(), req.GetEndRecheckTx(), grpc.WaitForReady(true))
+	if err != nil {
+		cli.StopForError(err)
+	}
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_EndRecheckTx{EndRecheckTx: res}})
+}
+
 func (cli *grpcClient) ListSnapshotsAsync(params types.RequestListSnapshots) *ReqRes {
 	req := types.ToRequestListSnapshots(params)
 	res, err := cli.client.ListSnapshots(context.Background(), req.GetListSnapshots(), grpc.WaitForReady(true))
@@ -396,6 +414,16 @@ func (cli *grpcClient) EndBlockSync(params types.RequestEndBlock) (*types.Respon
 	return cli.finishSyncCall(reqres).GetEndBlock(), cli.Error()
 }
 
+func (cli *grpcClient) BeginRecheckTxSync(params types.RequestBeginRecheckTx) (*types.ResponseBeginRecheckTx, error) {
+	reqres := cli.BeginRecheckTxAsync(params)
+	return reqres.Response.GetBeginRecheckTx(), cli.Error()
+}
+
+func (cli *grpcClient) EndRecheckTxSync(params types.RequestEndRecheckTx) (*types.ResponseEndRecheckTx, error) {
+	reqres := cli.EndRecheckTxAsync(params)
+	return reqres.Response.GetEndRecheckTx(), cli.Error()
+}
+
 func (cli *grpcClient) ListSnapshotsSync(params types.RequestListSnapshots) (*types.ResponseListSnapshots, error) {
 	reqres := cli.ListSnapshotsAsync(params)
 	return cli.finishSyncCall(reqres).GetListSnapshots(), cli.Error()
diff --git a/abci/client/local_client.go b/abci/client/local_client.go
index 5bc0ec0fb..9737453ab 100644
--- a/abci/client/local_client.go
+++ b/abci/client/local_client.go
@@ -92,9 +92,8 @@ func (app *localClient) DeliverTxAsync(params types.RequestDeliverTx) *ReqRes {
 }
 
 func (app *localClient) CheckTxAsync(req types.RequestCheckTx) *ReqRes {
-	app.mtx.Lock()
-	defer app.mtx.Unlock()
-
+	// CONTRACT: Application should handle concurrent `CheckTx`
+	// In this abci client layer, we don't protect `CheckTx` with a mutex for concurrency
 	res := app.Application.CheckTx(req)
 	return app.callback(
 		types.ToRequestCheckTx(req),
@@ -157,6 +156,28 @@ func (app *localClient) EndBlockAsync(req types.RequestEndBlock) *ReqRes {
 	)
 }
 
+func (app *localClient) BeginRecheckTxAsync(req types.RequestBeginRecheckTx) *ReqRes {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.BeginRecheckTx(req)
+	return app.callback(
+		types.ToRequestBeginRecheckTx(req),
+		types.ToResponseBeginRecheckTx(res),
+	)
+}
+
+func (app *localClient) EndRecheckTxAsync(req types.RequestEndRecheckTx) *ReqRes {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.EndRecheckTx(req)
+	return app.callback(
+		types.ToRequestEndRecheckTx(req),
+		types.ToResponseEndRecheckTx(res),
+	)
+}
+
 func (app *localClient) ListSnapshotsAsync(req types.RequestListSnapshots) *ReqRes {
 	app.mtx.Lock()
 	defer app.mtx.Unlock()
@@ -236,9 +257,8 @@ func (app *localClient) DeliverTxSync(req types.RequestDeliverTx) (*types.Respon
 }
 
 func (app *localClient) CheckTxSync(req types.RequestCheckTx) (*types.ResponseCheckTx, error) {
-	app.mtx.Lock()
-	defer app.mtx.Unlock()
-
+	// CONTRACT: Application should handle concurrent `CheckTx`
+	// In this abci client layer, we don't protect `CheckTx` with a mutex for concurrency
 	res := app.Application.CheckTx(req)
 	return &res, nil
 }
@@ -283,6 +303,22 @@ func (app *localClient) EndBlockSync(req types.RequestEndBlock) (*types.Response
 	return &res, nil
 }
 
+func (app *localClient) BeginRecheckTxSync(req types.RequestBeginRecheckTx) (*types.ResponseBeginRecheckTx, error) {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.BeginRecheckTx(req)
+	return &res, nil
+}
+
+func (app *localClient) EndRecheckTxSync(req types.RequestEndRecheckTx) (*types.ResponseEndRecheckTx, error) {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.EndRecheckTx(req)
+	return &res, nil
+}
+
 func (app *localClient) ListSnapshotsSync(req types.RequestListSnapshots) (*types.ResponseListSnapshots, error) {
 	app.mtx.Lock()
 	defer app.mtx.Unlock()
diff --git a/abci/client/mocks/client.go b/abci/client/mocks/client.go
index 9b4a046b0..031e983b4 100644
--- a/abci/client/mocks/client.go
+++ b/abci/client/mocks/client.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v1.1.1. DO NOT EDIT.
+// Code generated by mockery 2.7.4. DO NOT EDIT.
 
 package mocks
 
@@ -94,6 +94,45 @@ func (_m *Client) BeginBlockSync(_a0 types.RequestBeginBlock) (*types.ResponseBe
 	return r0, r1
 }
 
+// BeginRecheckTxAsync provides a mock function with given fields: _a0
+func (_m *Client) BeginRecheckTxAsync(_a0 types.RequestBeginRecheckTx) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestBeginRecheckTx) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// BeginRecheckTxSync provides a mock function with given fields: _a0
+func (_m *Client) BeginRecheckTxSync(_a0 types.RequestBeginRecheckTx) (*types.ResponseBeginRecheckTx, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseBeginRecheckTx
+	if rf, ok := ret.Get(0).(func(types.RequestBeginRecheckTx) *types.ResponseBeginRecheckTx); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseBeginRecheckTx)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestBeginRecheckTx) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // CheckTxAsync provides a mock function with given fields: _a0
 func (_m *Client) CheckTxAsync(_a0 types.RequestCheckTx) *abcicli.ReqRes {
 	ret := _m.Called(_a0)
@@ -289,6 +328,45 @@ func (_m *Client) EndBlockSync(_a0 types.RequestEndBlock) (*types.ResponseEndBlo
 	return r0, r1
 }
 
+// EndRecheckTxAsync provides a mock function with given fields: _a0
+func (_m *Client) EndRecheckTxAsync(_a0 types.RequestEndRecheckTx) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestEndRecheckTx) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// EndRecheckTxSync provides a mock function with given fields: _a0
+func (_m *Client) EndRecheckTxSync(_a0 types.RequestEndRecheckTx) (*types.ResponseEndRecheckTx, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseEndRecheckTx
+	if rf, ok := ret.Get(0).(func(types.RequestEndRecheckTx) *types.ResponseEndRecheckTx); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseEndRecheckTx)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestEndRecheckTx) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // Error provides a mock function with given fields:
 func (_m *Client) Error() error {
 	ret := _m.Called()
diff --git a/abci/client/socket_client.go b/abci/client/socket_client.go
index 736a9a1d6..d70441993 100644
--- a/abci/client/socket_client.go
+++ b/abci/client/socket_client.go
@@ -263,6 +263,14 @@ func (cli *socketClient) EndBlockAsync(req types.RequestEndBlock) *ReqRes {
 	return cli.queueRequest(types.ToRequestEndBlock(req))
 }
 
+func (cli *socketClient) BeginRecheckTxAsync(req types.RequestBeginRecheckTx) *ReqRes {
+	return cli.queueRequest(types.ToRequestBeginRecheckTx(req))
+}
+
+func (cli *socketClient) EndRecheckTxAsync(req types.RequestEndRecheckTx) *ReqRes {
+	return cli.queueRequest(types.ToRequestEndRecheckTx(req))
+}
+
 func (cli *socketClient) ListSnapshotsAsync(req types.RequestListSnapshots) *ReqRes {
 	return cli.queueRequest(types.ToRequestListSnapshots(req))
 }
@@ -380,6 +388,24 @@ func (cli *socketClient) EndBlockSync(req types.RequestEndBlock) (*types.Respons
 	return reqres.Response.GetEndBlock(), cli.Error()
 }
 
+func (cli *socketClient) BeginRecheckTxSync(req types.RequestBeginRecheckTx) (*types.ResponseBeginRecheckTx, error) {
+	reqres := cli.queueRequest(types.ToRequestBeginRecheckTx(req))
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
+	return reqres.Response.GetBeginRecheckTx(), cli.Error()
+}
+
+func (cli *socketClient) EndRecheckTxSync(req types.RequestEndRecheckTx) (*types.ResponseEndRecheckTx, error) {
+	reqres := cli.queueRequest(types.ToRequestEndRecheckTx(req))
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
+	return reqres.Response.GetEndRecheckTx(), cli.Error()
+}
+
 func (cli *socketClient) ListSnapshotsSync(req types.RequestListSnapshots) (*types.ResponseListSnapshots, error) {
 	reqres := cli.queueRequest(types.ToRequestListSnapshots(req))
 	if err := cli.FlushSync(); err != nil {
diff --git a/abci/example/kvstore/persistent_kvstore.go b/abci/example/kvstore/persistent_kvstore.go
index 6a449d3e8..f54c69ef3 100644
--- a/abci/example/kvstore/persistent_kvstore.go
+++ b/abci/example/kvstore/persistent_kvstore.go
@@ -84,6 +84,14 @@ func (app *PersistentKVStoreApplication) CheckTx(req types.RequestCheckTx) types
 	return app.app.CheckTx(req)
 }
 
+func (app *PersistentKVStoreApplication) BeginRecheckTx(req types.RequestBeginRecheckTx) types.ResponseBeginRecheckTx {
+	return app.app.BeginRecheckTx(req)
+}
+
+func (app *PersistentKVStoreApplication) EndRecheckTx(req types.RequestEndRecheckTx) types.ResponseEndRecheckTx {
+	return app.app.EndRecheckTx(req)
+}
+
 // Commit will panic if InitChain was not called
 func (app *PersistentKVStoreApplication) Commit() types.ResponseCommit {
 	return app.app.Commit()
diff --git a/abci/types/application.go b/abci/types/application.go
index 65cc78b8c..9d93f8e2a 100644
--- a/abci/types/application.go
+++ b/abci/types/application.go
@@ -15,7 +15,9 @@ type Application interface {
 	Query(RequestQuery) ResponseQuery             // Query for state
 
 	// Mempool Connection
-	CheckTx(RequestCheckTx) ResponseCheckTx // Validate a tx for the mempool
+	CheckTx(RequestCheckTx) ResponseCheckTx                      // Validate a tx for the mempool
+	BeginRecheckTx(RequestBeginRecheckTx) ResponseBeginRecheckTx // Signals the beginning of rechecking
+	EndRecheckTx(RequestEndRecheckTx) ResponseEndRecheckTx       // Signals the end of rechecking
 
 	// Consensus Connection
 	InitChain(RequestInitChain) ResponseInitChain    // Initialize blockchain w validators/other info from TendermintCore
@@ -79,6 +81,14 @@ func (BaseApplication) EndBlock(req RequestEndBlock) ResponseEndBlock {
 	return ResponseEndBlock{}
 }
 
+func (BaseApplication) BeginRecheckTx(req RequestBeginRecheckTx) ResponseBeginRecheckTx {
+	return ResponseBeginRecheckTx{Code: CodeTypeOK}
+}
+
+func (BaseApplication) EndRecheckTx(req RequestEndRecheckTx) ResponseEndRecheckTx {
+	return ResponseEndRecheckTx{Code: CodeTypeOK}
+}
+
 func (BaseApplication) ListSnapshots(req RequestListSnapshots) ResponseListSnapshots {
 	return ResponseListSnapshots{}
 }
@@ -159,6 +169,17 @@ func (app *GRPCApplication) EndBlock(ctx context.Context, req *RequestEndBlock)
 	return &res, nil
 }
 
+func (app *GRPCApplication) BeginRecheckTx(ctx context.Context, req *RequestBeginRecheckTx) (
+	*ResponseBeginRecheckTx, error) {
+	res := app.app.BeginRecheckTx(*req)
+	return &res, nil
+}
+
+func (app *GRPCApplication) EndRecheckTx(ctx context.Context, req *RequestEndRecheckTx) (*ResponseEndRecheckTx, error) {
+	res := app.app.EndRecheckTx(*req)
+	return &res, nil
+}
+
 func (app *GRPCApplication) ListSnapshots(
 	ctx context.Context, req *RequestListSnapshots) (*ResponseListSnapshots, error) {
 	res := app.app.ListSnapshots(*req)
diff --git a/abci/types/messages.go b/abci/types/messages.go
index 531f75fed..e617f8593 100644
--- a/abci/types/messages.go
+++ b/abci/types/messages.go
@@ -135,6 +135,18 @@ func ToRequestEndBlock(req RequestEndBlock) *Request {
 	}
 }
 
+func ToRequestBeginRecheckTx(req RequestBeginRecheckTx) *Request {
+	return &Request{
+		Value: &Request_BeginRecheckTx{&req},
+	}
+}
+
+func ToRequestEndRecheckTx(req RequestEndRecheckTx) *Request {
+	return &Request{
+		Value: &Request_EndRecheckTx{&req},
+	}
+}
+
 func ToRequestListSnapshots(req RequestListSnapshots) *Request {
 	return &Request{
 		Value: &Request_ListSnapshots{&req},
@@ -233,6 +245,18 @@ func ToResponseEndBlock(res ResponseEndBlock) *Response {
 	}
 }
 
+func ToResponseBeginRecheckTx(res ResponseBeginRecheckTx) *Response {
+	return &Response{
+		Value: &Response_BeginRecheckTx{&res},
+	}
+}
+
+func ToResponseEndRecheckTx(res ResponseEndRecheckTx) *Response {
+	return &Response{
+		Value: &Response_EndRecheckTx{&res},
+	}
+}
+
 func ToResponseListSnapshots(res ResponseListSnapshots) *Response {
 	return &Response{
 		Value: &Response_ListSnapshots{&res},
diff --git a/abci/types/types.pb.go b/abci/types/types.pb.go
index 73d21c07d..1889f80fc 100644
--- a/abci/types/types.pb.go
+++ b/abci/types/types.pb.go
@@ -120,7 +120,7 @@ func (x ResponseOfferSnapshot_Result) String() string {
 }
 
 func (ResponseOfferSnapshot_Result) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{30, 0}
+	return fileDescriptor_addf585b2317eb36, []int{32, 0}
 }
 
 type ResponseApplySnapshotChunk_Result int32
@@ -157,7 +157,7 @@ func (x ResponseApplySnapshotChunk_Result) String() string {
 }
 
 func (ResponseApplySnapshotChunk_Result) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{32, 0}
+	return fileDescriptor_addf585b2317eb36, []int{34, 0}
 }
 
 type Request struct {
@@ -177,6 +177,8 @@ type Request struct {
 	//	*Request_OfferSnapshot
 	//	*Request_LoadSnapshotChunk
 	//	*Request_ApplySnapshotChunk
+	//	*Request_BeginRecheckTx
+	//	*Request_EndRecheckTx
 	Value isRequest_Value `protobuf_oneof:"value"`
 }
 
@@ -264,6 +266,12 @@ type Request_LoadSnapshotChunk struct {
 type Request_ApplySnapshotChunk struct {
 	ApplySnapshotChunk *RequestApplySnapshotChunk `protobuf:"bytes,15,opt,name=apply_snapshot_chunk,json=applySnapshotChunk,proto3,oneof" json:"apply_snapshot_chunk,omitempty"`
 }
+type Request_BeginRecheckTx struct {
+	BeginRecheckTx *RequestBeginRecheckTx `protobuf:"bytes,100,opt,name=begin_recheck_tx,json=beginRecheckTx,proto3,oneof" json:"begin_recheck_tx,omitempty"`
+}
+type Request_EndRecheckTx struct {
+	EndRecheckTx *RequestEndRecheckTx `protobuf:"bytes,101,opt,name=end_recheck_tx,json=endRecheckTx,proto3,oneof" json:"end_recheck_tx,omitempty"`
+}
 
 func (*Request_Echo) isRequest_Value()               {}
 func (*Request_Flush) isRequest_Value()              {}
@@ -280,6 +288,8 @@ func (*Request_ListSnapshots) isRequest_Value()      {}
 func (*Request_OfferSnapshot) isRequest_Value()      {}
 func (*Request_LoadSnapshotChunk) isRequest_Value()  {}
 func (*Request_ApplySnapshotChunk) isRequest_Value() {}
+func (*Request_BeginRecheckTx) isRequest_Value()     {}
+func (*Request_EndRecheckTx) isRequest_Value()       {}
 
 func (m *Request) GetValue() isRequest_Value {
 	if m != nil {
@@ -393,6 +403,20 @@ func (m *Request) GetApplySnapshotChunk() *RequestApplySnapshotChunk {
 	return nil
 }
 
+func (m *Request) GetBeginRecheckTx() *RequestBeginRecheckTx {
+	if x, ok := m.GetValue().(*Request_BeginRecheckTx); ok {
+		return x.BeginRecheckTx
+	}
+	return nil
+}
+
+func (m *Request) GetEndRecheckTx() *RequestEndRecheckTx {
+	if x, ok := m.GetValue().(*Request_EndRecheckTx); ok {
+		return x.EndRecheckTx
+	}
+	return nil
+}
+
 // XXX_OneofWrappers is for the internal use of the proto package.
 func (*Request) XXX_OneofWrappers() []interface{} {
 	return []interface{}{
@@ -411,6 +435,8 @@ func (*Request) XXX_OneofWrappers() []interface{} {
 		(*Request_OfferSnapshot)(nil),
 		(*Request_LoadSnapshotChunk)(nil),
 		(*Request_ApplySnapshotChunk)(nil),
+		(*Request_BeginRecheckTx)(nil),
+		(*Request_EndRecheckTx)(nil),
 	}
 }
 
@@ -1215,6 +1241,94 @@ func (m *RequestApplySnapshotChunk) GetSender() string {
 	return ""
 }
 
+type RequestBeginRecheckTx struct {
+	Header types1.Header `protobuf:"bytes,1,opt,name=header,proto3" json:"header"`
+}
+
+func (m *RequestBeginRecheckTx) Reset()         { *m = RequestBeginRecheckTx{} }
+func (m *RequestBeginRecheckTx) String() string { return proto.CompactTextString(m) }
+func (*RequestBeginRecheckTx) ProtoMessage()    {}
+func (*RequestBeginRecheckTx) Descriptor() ([]byte, []int) {
+	return fileDescriptor_addf585b2317eb36, []int{16}
+}
+func (m *RequestBeginRecheckTx) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *RequestBeginRecheckTx) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_RequestBeginRecheckTx.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *RequestBeginRecheckTx) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RequestBeginRecheckTx.Merge(m, src)
+}
+func (m *RequestBeginRecheckTx) XXX_Size() int {
+	return m.Size()
+}
+func (m *RequestBeginRecheckTx) XXX_DiscardUnknown() {
+	xxx_messageInfo_RequestBeginRecheckTx.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RequestBeginRecheckTx proto.InternalMessageInfo
+
+func (m *RequestBeginRecheckTx) GetHeader() types1.Header {
+	if m != nil {
+		return m.Header
+	}
+	return types1.Header{}
+}
+
+type RequestEndRecheckTx struct {
+	Height int64 `protobuf:"varint,1,opt,name=height,proto3" json:"height,omitempty"`
+}
+
+func (m *RequestEndRecheckTx) Reset()         { *m = RequestEndRecheckTx{} }
+func (m *RequestEndRecheckTx) String() string { return proto.CompactTextString(m) }
+func (*RequestEndRecheckTx) ProtoMessage()    {}
+func (*RequestEndRecheckTx) Descriptor() ([]byte, []int) {
+	return fileDescriptor_addf585b2317eb36, []int{17}
+}
+func (m *RequestEndRecheckTx) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *RequestEndRecheckTx) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_RequestEndRecheckTx.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *RequestEndRecheckTx) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RequestEndRecheckTx.Merge(m, src)
+}
+func (m *RequestEndRecheckTx) XXX_Size() int {
+	return m.Size()
+}
+func (m *RequestEndRecheckTx) XXX_DiscardUnknown() {
+	xxx_messageInfo_RequestEndRecheckTx.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RequestEndRecheckTx proto.InternalMessageInfo
+
+func (m *RequestEndRecheckTx) GetHeight() int64 {
+	if m != nil {
+		return m.Height
+	}
+	return 0
+}
+
 type Response struct {
 	// Types that are valid to be assigned to Value:
 	//	*Response_Exception
@@ -1233,6 +1347,8 @@ type Response struct {
 	//	*Response_OfferSnapshot
 	//	*Response_LoadSnapshotChunk
 	//	*Response_ApplySnapshotChunk
+	//	*Response_BeginRecheckTx
+	//	*Response_EndRecheckTx
 	Value isResponse_Value `protobuf_oneof:"value"`
 }
 
@@ -1240,7 +1356,7 @@ func (m *Response) Reset()         { *m = Response{} }
 func (m *Response) String() string { return proto.CompactTextString(m) }
 func (*Response) ProtoMessage()    {}
 func (*Response) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{16}
+	return fileDescriptor_addf585b2317eb36, []int{18}
 }
 func (m *Response) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1323,6 +1439,12 @@ type Response_LoadSnapshotChunk struct {
 type Response_ApplySnapshotChunk struct {
 	ApplySnapshotChunk *ResponseApplySnapshotChunk `protobuf:"bytes,16,opt,name=apply_snapshot_chunk,json=applySnapshotChunk,proto3,oneof" json:"apply_snapshot_chunk,omitempty"`
 }
+type Response_BeginRecheckTx struct {
+	BeginRecheckTx *ResponseBeginRecheckTx `protobuf:"bytes,100,opt,name=begin_recheck_tx,json=beginRecheckTx,proto3,oneof" json:"begin_recheck_tx,omitempty"`
+}
+type Response_EndRecheckTx struct {
+	EndRecheckTx *ResponseEndRecheckTx `protobuf:"bytes,101,opt,name=end_recheck_tx,json=endRecheckTx,proto3,oneof" json:"end_recheck_tx,omitempty"`
+}
 
 func (*Response_Exception) isResponse_Value()          {}
 func (*Response_Echo) isResponse_Value()               {}
@@ -1340,6 +1462,8 @@ func (*Response_ListSnapshots) isResponse_Value()      {}
 func (*Response_OfferSnapshot) isResponse_Value()      {}
 func (*Response_LoadSnapshotChunk) isResponse_Value()  {}
 func (*Response_ApplySnapshotChunk) isResponse_Value() {}
+func (*Response_BeginRecheckTx) isResponse_Value()     {}
+func (*Response_EndRecheckTx) isResponse_Value()       {}
 
 func (m *Response) GetValue() isResponse_Value {
 	if m != nil {
@@ -1460,6 +1584,20 @@ func (m *Response) GetApplySnapshotChunk() *ResponseApplySnapshotChunk {
 	return nil
 }
 
+func (m *Response) GetBeginRecheckTx() *ResponseBeginRecheckTx {
+	if x, ok := m.GetValue().(*Response_BeginRecheckTx); ok {
+		return x.BeginRecheckTx
+	}
+	return nil
+}
+
+func (m *Response) GetEndRecheckTx() *ResponseEndRecheckTx {
+	if x, ok := m.GetValue().(*Response_EndRecheckTx); ok {
+		return x.EndRecheckTx
+	}
+	return nil
+}
+
 // XXX_OneofWrappers is for the internal use of the proto package.
 func (*Response) XXX_OneofWrappers() []interface{} {
 	return []interface{}{
@@ -1479,6 +1617,8 @@ func (*Response) XXX_OneofWrappers() []interface{} {
 		(*Response_OfferSnapshot)(nil),
 		(*Response_LoadSnapshotChunk)(nil),
 		(*Response_ApplySnapshotChunk)(nil),
+		(*Response_BeginRecheckTx)(nil),
+		(*Response_EndRecheckTx)(nil),
 	}
 }
 
@@ -1491,7 +1631,7 @@ func (m *ResponseException) Reset()         { *m = ResponseException{} }
 func (m *ResponseException) String() string { return proto.CompactTextString(m) }
 func (*ResponseException) ProtoMessage()    {}
 func (*ResponseException) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{17}
+	return fileDescriptor_addf585b2317eb36, []int{19}
 }
 func (m *ResponseException) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1535,7 +1675,7 @@ func (m *ResponseEcho) Reset()         { *m = ResponseEcho{} }
 func (m *ResponseEcho) String() string { return proto.CompactTextString(m) }
 func (*ResponseEcho) ProtoMessage()    {}
 func (*ResponseEcho) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{18}
+	return fileDescriptor_addf585b2317eb36, []int{20}
 }
 func (m *ResponseEcho) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1578,7 +1718,7 @@ func (m *ResponseFlush) Reset()         { *m = ResponseFlush{} }
 func (m *ResponseFlush) String() string { return proto.CompactTextString(m) }
 func (*ResponseFlush) ProtoMessage()    {}
 func (*ResponseFlush) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{19}
+	return fileDescriptor_addf585b2317eb36, []int{21}
 }
 func (m *ResponseFlush) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1619,7 +1759,7 @@ func (m *ResponseInfo) Reset()         { *m = ResponseInfo{} }
 func (m *ResponseInfo) String() string { return proto.CompactTextString(m) }
 func (*ResponseInfo) ProtoMessage()    {}
 func (*ResponseInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{20}
+	return fileDescriptor_addf585b2317eb36, []int{22}
 }
 func (m *ResponseInfo) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1695,7 +1835,7 @@ func (m *ResponseSetOption) Reset()         { *m = ResponseSetOption{} }
 func (m *ResponseSetOption) String() string { return proto.CompactTextString(m) }
 func (*ResponseSetOption) ProtoMessage()    {}
 func (*ResponseSetOption) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{21}
+	return fileDescriptor_addf585b2317eb36, []int{23}
 }
 func (m *ResponseSetOption) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1755,7 +1895,7 @@ func (m *ResponseInitChain) Reset()         { *m = ResponseInitChain{} }
 func (m *ResponseInitChain) String() string { return proto.CompactTextString(m) }
 func (*ResponseInitChain) ProtoMessage()    {}
 func (*ResponseInitChain) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{22}
+	return fileDescriptor_addf585b2317eb36, []int{24}
 }
 func (m *ResponseInitChain) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1822,7 +1962,7 @@ func (m *ResponseQuery) Reset()         { *m = ResponseQuery{} }
 func (m *ResponseQuery) String() string { return proto.CompactTextString(m) }
 func (*ResponseQuery) ProtoMessage()    {}
 func (*ResponseQuery) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{23}
+	return fileDescriptor_addf585b2317eb36, []int{25}
 }
 func (m *ResponseQuery) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1922,7 +2062,7 @@ func (m *ResponseBeginBlock) Reset()         { *m = ResponseBeginBlock{} }
 func (m *ResponseBeginBlock) String() string { return proto.CompactTextString(m) }
 func (*ResponseBeginBlock) ProtoMessage()    {}
 func (*ResponseBeginBlock) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{24}
+	return fileDescriptor_addf585b2317eb36, []int{26}
 }
 func (m *ResponseBeginBlock) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1973,7 +2113,7 @@ func (m *ResponseCheckTx) Reset()         { *m = ResponseCheckTx{} }
 func (m *ResponseCheckTx) String() string { return proto.CompactTextString(m) }
 func (*ResponseCheckTx) ProtoMessage()    {}
 func (*ResponseCheckTx) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{25}
+	return fileDescriptor_addf585b2317eb36, []int{27}
 }
 func (m *ResponseCheckTx) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2073,7 +2213,7 @@ func (m *ResponseDeliverTx) Reset()         { *m = ResponseDeliverTx{} }
 func (m *ResponseDeliverTx) String() string { return proto.CompactTextString(m) }
 func (*ResponseDeliverTx) ProtoMessage()    {}
 func (*ResponseDeliverTx) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{26}
+	return fileDescriptor_addf585b2317eb36, []int{28}
 }
 func (m *ResponseDeliverTx) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2168,7 +2308,7 @@ func (m *ResponseEndBlock) Reset()         { *m = ResponseEndBlock{} }
 func (m *ResponseEndBlock) String() string { return proto.CompactTextString(m) }
 func (*ResponseEndBlock) ProtoMessage()    {}
 func (*ResponseEndBlock) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{27}
+	return fileDescriptor_addf585b2317eb36, []int{29}
 }
 func (m *ResponseEndBlock) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2228,7 +2368,7 @@ func (m *ResponseCommit) Reset()         { *m = ResponseCommit{} }
 func (m *ResponseCommit) String() string { return proto.CompactTextString(m) }
 func (*ResponseCommit) ProtoMessage()    {}
 func (*ResponseCommit) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{28}
+	return fileDescriptor_addf585b2317eb36, []int{30}
 }
 func (m *ResponseCommit) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2279,7 +2419,7 @@ func (m *ResponseListSnapshots) Reset()         { *m = ResponseListSnapshots{} }
 func (m *ResponseListSnapshots) String() string { return proto.CompactTextString(m) }
 func (*ResponseListSnapshots) ProtoMessage()    {}
 func (*ResponseListSnapshots) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{29}
+	return fileDescriptor_addf585b2317eb36, []int{31}
 }
 func (m *ResponseListSnapshots) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2323,7 +2463,7 @@ func (m *ResponseOfferSnapshot) Reset()         { *m = ResponseOfferSnapshot{} }
 func (m *ResponseOfferSnapshot) String() string { return proto.CompactTextString(m) }
 func (*ResponseOfferSnapshot) ProtoMessage()    {}
 func (*ResponseOfferSnapshot) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{30}
+	return fileDescriptor_addf585b2317eb36, []int{32}
 }
 func (m *ResponseOfferSnapshot) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2367,7 +2507,7 @@ func (m *ResponseLoadSnapshotChunk) Reset()         { *m = ResponseLoadSnapshotC
 func (m *ResponseLoadSnapshotChunk) String() string { return proto.CompactTextString(m) }
 func (*ResponseLoadSnapshotChunk) ProtoMessage()    {}
 func (*ResponseLoadSnapshotChunk) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{31}
+	return fileDescriptor_addf585b2317eb36, []int{33}
 }
 func (m *ResponseLoadSnapshotChunk) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2413,7 +2553,7 @@ func (m *ResponseApplySnapshotChunk) Reset()         { *m = ResponseApplySnapsho
 func (m *ResponseApplySnapshotChunk) String() string { return proto.CompactTextString(m) }
 func (*ResponseApplySnapshotChunk) ProtoMessage()    {}
 func (*ResponseApplySnapshotChunk) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{32}
+	return fileDescriptor_addf585b2317eb36, []int{34}
 }
 func (m *ResponseApplySnapshotChunk) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2463,6 +2603,94 @@ func (m *ResponseApplySnapshotChunk) GetRejectSenders() []string {
 	return nil
 }
 
+type ResponseBeginRecheckTx struct {
+	Code uint32 `protobuf:"varint,1,opt,name=code,proto3" json:"code,omitempty"`
+}
+
+func (m *ResponseBeginRecheckTx) Reset()         { *m = ResponseBeginRecheckTx{} }
+func (m *ResponseBeginRecheckTx) String() string { return proto.CompactTextString(m) }
+func (*ResponseBeginRecheckTx) ProtoMessage()    {}
+func (*ResponseBeginRecheckTx) Descriptor() ([]byte, []int) {
+	return fileDescriptor_addf585b2317eb36, []int{35}
+}
+func (m *ResponseBeginRecheckTx) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *ResponseBeginRecheckTx) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_ResponseBeginRecheckTx.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *ResponseBeginRecheckTx) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ResponseBeginRecheckTx.Merge(m, src)
+}
+func (m *ResponseBeginRecheckTx) XXX_Size() int {
+	return m.Size()
+}
+func (m *ResponseBeginRecheckTx) XXX_DiscardUnknown() {
+	xxx_messageInfo_ResponseBeginRecheckTx.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ResponseBeginRecheckTx proto.InternalMessageInfo
+
+func (m *ResponseBeginRecheckTx) GetCode() uint32 {
+	if m != nil {
+		return m.Code
+	}
+	return 0
+}
+
+type ResponseEndRecheckTx struct {
+	Code uint32 `protobuf:"varint,1,opt,name=code,proto3" json:"code,omitempty"`
+}
+
+func (m *ResponseEndRecheckTx) Reset()         { *m = ResponseEndRecheckTx{} }
+func (m *ResponseEndRecheckTx) String() string { return proto.CompactTextString(m) }
+func (*ResponseEndRecheckTx) ProtoMessage()    {}
+func (*ResponseEndRecheckTx) Descriptor() ([]byte, []int) {
+	return fileDescriptor_addf585b2317eb36, []int{36}
+}
+func (m *ResponseEndRecheckTx) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *ResponseEndRecheckTx) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_ResponseEndRecheckTx.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *ResponseEndRecheckTx) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ResponseEndRecheckTx.Merge(m, src)
+}
+func (m *ResponseEndRecheckTx) XXX_Size() int {
+	return m.Size()
+}
+func (m *ResponseEndRecheckTx) XXX_DiscardUnknown() {
+	xxx_messageInfo_ResponseEndRecheckTx.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ResponseEndRecheckTx proto.InternalMessageInfo
+
+func (m *ResponseEndRecheckTx) GetCode() uint32 {
+	if m != nil {
+		return m.Code
+	}
+	return 0
+}
+
 // ConsensusParams contains all consensus-relevant parameters
 // that can be adjusted by the abci app
 type ConsensusParams struct {
@@ -2476,7 +2704,7 @@ func (m *ConsensusParams) Reset()         { *m = ConsensusParams{} }
 func (m *ConsensusParams) String() string { return proto.CompactTextString(m) }
 func (*ConsensusParams) ProtoMessage()    {}
 func (*ConsensusParams) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{33}
+	return fileDescriptor_addf585b2317eb36, []int{37}
 }
 func (m *ConsensusParams) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2545,7 +2773,7 @@ func (m *BlockParams) Reset()         { *m = BlockParams{} }
 func (m *BlockParams) String() string { return proto.CompactTextString(m) }
 func (*BlockParams) ProtoMessage()    {}
 func (*BlockParams) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{34}
+	return fileDescriptor_addf585b2317eb36, []int{38}
 }
 func (m *BlockParams) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2597,7 +2825,7 @@ func (m *LastCommitInfo) Reset()         { *m = LastCommitInfo{} }
 func (m *LastCommitInfo) String() string { return proto.CompactTextString(m) }
 func (*LastCommitInfo) ProtoMessage()    {}
 func (*LastCommitInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{35}
+	return fileDescriptor_addf585b2317eb36, []int{39}
 }
 func (m *LastCommitInfo) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2652,7 +2880,7 @@ func (m *Event) Reset()         { *m = Event{} }
 func (m *Event) String() string { return proto.CompactTextString(m) }
 func (*Event) ProtoMessage()    {}
 func (*Event) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{36}
+	return fileDescriptor_addf585b2317eb36, []int{40}
 }
 func (m *Event) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2706,7 +2934,7 @@ func (m *EventAttribute) Reset()         { *m = EventAttribute{} }
 func (m *EventAttribute) String() string { return proto.CompactTextString(m) }
 func (*EventAttribute) ProtoMessage()    {}
 func (*EventAttribute) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{37}
+	return fileDescriptor_addf585b2317eb36, []int{41}
 }
 func (m *EventAttribute) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2770,7 +2998,7 @@ func (m *TxResult) Reset()         { *m = TxResult{} }
 func (m *TxResult) String() string { return proto.CompactTextString(m) }
 func (*TxResult) ProtoMessage()    {}
 func (*TxResult) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{38}
+	return fileDescriptor_addf585b2317eb36, []int{42}
 }
 func (m *TxResult) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2838,7 +3066,7 @@ func (m *Validator) Reset()         { *m = Validator{} }
 func (m *Validator) String() string { return proto.CompactTextString(m) }
 func (*Validator) ProtoMessage()    {}
 func (*Validator) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{39}
+	return fileDescriptor_addf585b2317eb36, []int{43}
 }
 func (m *Validator) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2891,7 +3119,7 @@ func (m *ValidatorUpdate) Reset()         { *m = ValidatorUpdate{} }
 func (m *ValidatorUpdate) String() string { return proto.CompactTextString(m) }
 func (*ValidatorUpdate) ProtoMessage()    {}
 func (*ValidatorUpdate) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{40}
+	return fileDescriptor_addf585b2317eb36, []int{44}
 }
 func (m *ValidatorUpdate) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2944,7 +3172,7 @@ func (m *VoteInfo) Reset()         { *m = VoteInfo{} }
 func (m *VoteInfo) String() string { return proto.CompactTextString(m) }
 func (*VoteInfo) ProtoMessage()    {}
 func (*VoteInfo) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{41}
+	return fileDescriptor_addf585b2317eb36, []int{45}
 }
 func (m *VoteInfo) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3005,7 +3233,7 @@ func (m *Evidence) Reset()         { *m = Evidence{} }
 func (m *Evidence) String() string { return proto.CompactTextString(m) }
 func (*Evidence) ProtoMessage()    {}
 func (*Evidence) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{42}
+	return fileDescriptor_addf585b2317eb36, []int{46}
 }
 func (m *Evidence) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3081,7 +3309,7 @@ func (m *Snapshot) Reset()         { *m = Snapshot{} }
 func (m *Snapshot) String() string { return proto.CompactTextString(m) }
 func (*Snapshot) ProtoMessage()    {}
 func (*Snapshot) Descriptor() ([]byte, []int) {
-	return fileDescriptor_addf585b2317eb36, []int{43}
+	return fileDescriptor_addf585b2317eb36, []int{47}
 }
 func (m *Snapshot) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -3166,6 +3394,8 @@ func init() {
 	proto.RegisterType((*RequestOfferSnapshot)(nil), "ostracon.abci.RequestOfferSnapshot")
 	proto.RegisterType((*RequestLoadSnapshotChunk)(nil), "ostracon.abci.RequestLoadSnapshotChunk")
 	proto.RegisterType((*RequestApplySnapshotChunk)(nil), "ostracon.abci.RequestApplySnapshotChunk")
+	proto.RegisterType((*RequestBeginRecheckTx)(nil), "ostracon.abci.RequestBeginRecheckTx")
+	proto.RegisterType((*RequestEndRecheckTx)(nil), "ostracon.abci.RequestEndRecheckTx")
 	proto.RegisterType((*Response)(nil), "ostracon.abci.Response")
 	proto.RegisterType((*ResponseException)(nil), "ostracon.abci.ResponseException")
 	proto.RegisterType((*ResponseEcho)(nil), "ostracon.abci.ResponseEcho")
@@ -3183,6 +3413,8 @@ func init() {
 	proto.RegisterType((*ResponseOfferSnapshot)(nil), "ostracon.abci.ResponseOfferSnapshot")
 	proto.RegisterType((*ResponseLoadSnapshotChunk)(nil), "ostracon.abci.ResponseLoadSnapshotChunk")
 	proto.RegisterType((*ResponseApplySnapshotChunk)(nil), "ostracon.abci.ResponseApplySnapshotChunk")
+	proto.RegisterType((*ResponseBeginRecheckTx)(nil), "ostracon.abci.ResponseBeginRecheckTx")
+	proto.RegisterType((*ResponseEndRecheckTx)(nil), "ostracon.abci.ResponseEndRecheckTx")
 	proto.RegisterType((*ConsensusParams)(nil), "ostracon.abci.ConsensusParams")
 	proto.RegisterType((*BlockParams)(nil), "ostracon.abci.BlockParams")
 	proto.RegisterType((*LastCommitInfo)(nil), "ostracon.abci.LastCommitInfo")
@@ -3199,179 +3431,187 @@ func init() {
 func init() { proto.RegisterFile("ostracon/abci/types.proto", fileDescriptor_addf585b2317eb36) }
 
 var fileDescriptor_addf585b2317eb36 = []byte{
-	// 2743 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe4, 0x5a, 0x4b, 0x73, 0x1b, 0xc7,
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+	0x37, 0x4f, 0x98, 0xd3, 0x2e, 0xf0, 0xa5, 0xd4, 0xca, 0x27, 0xea, 0x40, 0x49, 0xb0, 0xe1, 0xd4,
+	0xdb, 0x6c, 0x29, 0xbd, 0x04, 0x48, 0x17, 0xc9, 0xaf, 0x3e, 0x2c, 0xfa, 0x19, 0x41, 0x5a, 0x58,
+	0xca, 0x45, 0xf7, 0x00, 0x02, 0x49, 0xf1, 0xc2, 0xbf, 0x0c, 0xa4, 0xc5, 0x25, 0x5a, 0xb4, 0x0f,
+	0x15, 0x2f, 0xfd, 0x59, 0x70, 0xeb, 0x2f, 0x2d, 0xaa, 0x96, 0xa2, 0xf7, 0xa0, 0x16, 0x66, 0xfe,
+	0xcb, 0xdc, 0xe5, 0x4b, 0x4b, 0x95, 0x41, 0xa9, 0xef, 0x70, 0x12, 0xb0, 0xcc, 0xcd, 0xbe, 0xb4,
+	0x54, 0x4d, 0x14, 0x9d, 0xc2, 0xfa, 0x3c, 0x45, 0x5f, 0xf6, 0x9a, 0x5f, 0x5a, 0xba, 0x46, 0x8a,
+	0x0c, 0x40, 0x31, 0xb4, 0x7e, 0xe9, 0x3b, 0x7f, 0x69, 0xf9, 0x82, 0x29, 0xfa, 0x10, 0xea, 0x11,
+	0xa6, 0xbc, 0xd4, 0x0f, 0x00, 0xd2, 0x72, 0x85, 0x53, 0xf4, 0x0e, 0xac, 0x86, 0xa8, 0xf5, 0x12,
+	0x7f, 0x03, 0x48, 0xcb, 0x94, 0x50, 0x77, 0x5f, 0xfd, 0xe2, 0xeb, 0xcd, 0xec, 0x97, 0x5f, 0x6f,
+	0x66, 0xff, 0xf2, 0xf5, 0x66, 0xf6, 0xb3, 0x6f, 0x36, 0x33, 0x5f, 0x7e, 0xb3, 0x99, 0xf9, 0xd3,
+	0x37, 0x9b, 0x99, 0xf7, 0x6e, 0x0c, 0x0d, 0x32, 0x9a, 0xf5, 0xb7, 0x75, 0x6b, 0xb2, 0x33, 0x36,
+	0x4c, 0xbc, 0x13, 0xf3, 0xab, 0x56, 0xbf, 0xc4, 0x82, 0xe3, 0xed, 0xff, 0x04, 0x00, 0x00, 0xff,
+	0xff, 0x02, 0x9d, 0x43, 0x0a, 0xc8, 0x25, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -3401,6 +3641,8 @@ type ABCIApplicationClient interface {
 	OfferSnapshot(ctx context.Context, in *RequestOfferSnapshot, opts ...grpc.CallOption) (*ResponseOfferSnapshot, error)
 	LoadSnapshotChunk(ctx context.Context, in *RequestLoadSnapshotChunk, opts ...grpc.CallOption) (*ResponseLoadSnapshotChunk, error)
 	ApplySnapshotChunk(ctx context.Context, in *RequestApplySnapshotChunk, opts ...grpc.CallOption) (*ResponseApplySnapshotChunk, error)
+	BeginRecheckTx(ctx context.Context, in *RequestBeginRecheckTx, opts ...grpc.CallOption) (*ResponseBeginRecheckTx, error)
+	EndRecheckTx(ctx context.Context, in *RequestEndRecheckTx, opts ...grpc.CallOption) (*ResponseEndRecheckTx, error)
 }
 
 type aBCIApplicationClient struct {
@@ -3546,6 +3788,24 @@ func (c *aBCIApplicationClient) ApplySnapshotChunk(ctx context.Context, in *Requ
 	return out, nil
 }
 
+func (c *aBCIApplicationClient) BeginRecheckTx(ctx context.Context, in *RequestBeginRecheckTx, opts ...grpc.CallOption) (*ResponseBeginRecheckTx, error) {
+	out := new(ResponseBeginRecheckTx)
+	err := c.cc.Invoke(ctx, "/ostracon.abci.ABCIApplication/BeginRecheckTx", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *aBCIApplicationClient) EndRecheckTx(ctx context.Context, in *RequestEndRecheckTx, opts ...grpc.CallOption) (*ResponseEndRecheckTx, error) {
+	out := new(ResponseEndRecheckTx)
+	err := c.cc.Invoke(ctx, "/ostracon.abci.ABCIApplication/EndRecheckTx", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // ABCIApplicationServer is the server API for ABCIApplication service.
 type ABCIApplicationServer interface {
 	Echo(context.Context, *RequestEcho) (*ResponseEcho, error)
@@ -3563,6 +3823,8 @@ type ABCIApplicationServer interface {
 	OfferSnapshot(context.Context, *RequestOfferSnapshot) (*ResponseOfferSnapshot, error)
 	LoadSnapshotChunk(context.Context, *RequestLoadSnapshotChunk) (*ResponseLoadSnapshotChunk, error)
 	ApplySnapshotChunk(context.Context, *RequestApplySnapshotChunk) (*ResponseApplySnapshotChunk, error)
+	BeginRecheckTx(context.Context, *RequestBeginRecheckTx) (*ResponseBeginRecheckTx, error)
+	EndRecheckTx(context.Context, *RequestEndRecheckTx) (*ResponseEndRecheckTx, error)
 }
 
 // UnimplementedABCIApplicationServer can be embedded to have forward compatible implementations.
@@ -3614,6 +3876,12 @@ func (*UnimplementedABCIApplicationServer) LoadSnapshotChunk(ctx context.Context
 func (*UnimplementedABCIApplicationServer) ApplySnapshotChunk(ctx context.Context, req *RequestApplySnapshotChunk) (*ResponseApplySnapshotChunk, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method ApplySnapshotChunk not implemented")
 }
+func (*UnimplementedABCIApplicationServer) BeginRecheckTx(ctx context.Context, req *RequestBeginRecheckTx) (*ResponseBeginRecheckTx, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method BeginRecheckTx not implemented")
+}
+func (*UnimplementedABCIApplicationServer) EndRecheckTx(ctx context.Context, req *RequestEndRecheckTx) (*ResponseEndRecheckTx, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method EndRecheckTx not implemented")
+}
 
 func RegisterABCIApplicationServer(s *grpc.Server, srv ABCIApplicationServer) {
 	s.RegisterService(&_ABCIApplication_serviceDesc, srv)
@@ -3889,6 +4157,42 @@ func _ABCIApplication_ApplySnapshotChunk_Handler(srv interface{}, ctx context.Co
 	return interceptor(ctx, in, info, handler)
 }
 
+func _ABCIApplication_BeginRecheckTx_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(RequestBeginRecheckTx)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ABCIApplicationServer).BeginRecheckTx(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/ostracon.abci.ABCIApplication/BeginRecheckTx",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ABCIApplicationServer).BeginRecheckTx(ctx, req.(*RequestBeginRecheckTx))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ABCIApplication_EndRecheckTx_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(RequestEndRecheckTx)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ABCIApplicationServer).EndRecheckTx(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/ostracon.abci.ABCIApplication/EndRecheckTx",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ABCIApplicationServer).EndRecheckTx(ctx, req.(*RequestEndRecheckTx))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _ABCIApplication_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "ostracon.abci.ABCIApplication",
 	HandlerType: (*ABCIApplicationServer)(nil),
@@ -3953,6 +4257,14 @@ var _ABCIApplication_serviceDesc = grpc.ServiceDesc{
 			MethodName: "ApplySnapshotChunk",
 			Handler:    _ABCIApplication_ApplySnapshotChunk_Handler,
 		},
+		{
+			MethodName: "BeginRecheckTx",
+			Handler:    _ABCIApplication_BeginRecheckTx_Handler,
+		},
+		{
+			MethodName: "EndRecheckTx",
+			Handler:    _ABCIApplication_EndRecheckTx_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "ostracon/abci/types.proto",
@@ -4305,22 +4617,68 @@ func (m *Request_ApplySnapshotChunk) MarshalToSizedBuffer(dAtA []byte) (int, err
 	}
 	return len(dAtA) - i, nil
 }
-func (m *RequestEcho) Marshal() (dAtA []byte, err error) {
+func (m *Request_BeginRecheckTx) MarshalTo(dAtA []byte) (int, error) {
 	size := m.Size()
-	dAtA = make([]byte, size)
-	n, err := m.MarshalToSizedBuffer(dAtA[:size])
-	if err != nil {
-		return nil, err
-	}
-	return dAtA[:n], nil
+	return m.MarshalToSizedBuffer(dAtA[:size])
 }
 
-func (m *RequestEcho) MarshalTo(dAtA []byte) (int, error) {
+func (m *Request_BeginRecheckTx) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	if m.BeginRecheckTx != nil {
+		{
+			size, err := m.BeginRecheckTx.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintTypes(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x6
+		i--
+		dAtA[i] = 0xa2
+	}
+	return len(dAtA) - i, nil
+}
+func (m *Request_EndRecheckTx) MarshalTo(dAtA []byte) (int, error) {
 	size := m.Size()
 	return m.MarshalToSizedBuffer(dAtA[:size])
 }
 
-func (m *RequestEcho) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+func (m *Request_EndRecheckTx) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	if m.EndRecheckTx != nil {
+		{
+			size, err := m.EndRecheckTx.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintTypes(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x6
+		i--
+		dAtA[i] = 0xaa
+	}
+	return len(dAtA) - i, nil
+}
+func (m *RequestEcho) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *RequestEcho) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *RequestEcho) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	i := len(dAtA)
 	_ = i
 	var l int
@@ -4500,12 +4858,12 @@ func (m *RequestInitChain) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i--
 		dAtA[i] = 0x12
 	}
-	n17, err17 := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.Time, dAtA[i-github_com_gogo_protobuf_types.SizeOfStdTime(m.Time):])
-	if err17 != nil {
-		return 0, err17
+	n19, err19 := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.Time, dAtA[i-github_com_gogo_protobuf_types.SizeOfStdTime(m.Time):])
+	if err19 != nil {
+		return 0, err19
 	}
-	i -= n17
-	i = encodeVarintTypes(dAtA, i, uint64(n17))
+	i -= n19
+	i = encodeVarintTypes(dAtA, i, uint64(n19))
 	i--
 	dAtA[i] = 0xa
 	return len(dAtA) - i, nil
@@ -4888,6 +5246,67 @@ func (m *RequestApplySnapshotChunk) MarshalToSizedBuffer(dAtA []byte) (int, erro
 	return len(dAtA) - i, nil
 }
 
+func (m *RequestBeginRecheckTx) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *RequestBeginRecheckTx) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *RequestBeginRecheckTx) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	{
+		size, err := m.Header.MarshalToSizedBuffer(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = encodeVarintTypes(dAtA, i, uint64(size))
+	}
+	i--
+	dAtA[i] = 0xa
+	return len(dAtA) - i, nil
+}
+
+func (m *RequestEndRecheckTx) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *RequestEndRecheckTx) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *RequestEndRecheckTx) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.Height != 0 {
+		i = encodeVarintTypes(dAtA, i, uint64(m.Height))
+		i--
+		dAtA[i] = 0x8
+	}
+	return len(dAtA) - i, nil
+}
+
 func (m *Response) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
@@ -5258,6 +5677,52 @@ func (m *Response_ApplySnapshotChunk) MarshalToSizedBuffer(dAtA []byte) (int, er
 	}
 	return len(dAtA) - i, nil
 }
+func (m *Response_BeginRecheckTx) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *Response_BeginRecheckTx) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	if m.BeginRecheckTx != nil {
+		{
+			size, err := m.BeginRecheckTx.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintTypes(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x6
+		i--
+		dAtA[i] = 0xa2
+	}
+	return len(dAtA) - i, nil
+}
+func (m *Response_EndRecheckTx) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *Response_EndRecheckTx) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	if m.EndRecheckTx != nil {
+		{
+			size, err := m.EndRecheckTx.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintTypes(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x6
+		i--
+		dAtA[i] = 0xaa
+	}
+	return len(dAtA) - i, nil
+}
 func (m *ResponseException) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
@@ -5998,20 +6463,20 @@ func (m *ResponseApplySnapshotChunk) MarshalToSizedBuffer(dAtA []byte) (int, err
 		}
 	}
 	if len(m.RefetchChunks) > 0 {
-		dAtA41 := make([]byte, len(m.RefetchChunks)*10)
-		var j40 int
+		dAtA46 := make([]byte, len(m.RefetchChunks)*10)
+		var j45 int
 		for _, num := range m.RefetchChunks {
 			for num >= 1<<7 {
-				dAtA41[j40] = uint8(uint64(num)&0x7f | 0x80)
+				dAtA46[j45] = uint8(uint64(num)&0x7f | 0x80)
 				num >>= 7
-				j40++
+				j45++
 			}
-			dAtA41[j40] = uint8(num)
-			j40++
+			dAtA46[j45] = uint8(num)
+			j45++
 		}
-		i -= j40
-		copy(dAtA[i:], dAtA41[:j40])
-		i = encodeVarintTypes(dAtA, i, uint64(j40))
+		i -= j45
+		copy(dAtA[i:], dAtA46[:j45])
+		i = encodeVarintTypes(dAtA, i, uint64(j45))
 		i--
 		dAtA[i] = 0x12
 	}
@@ -6023,6 +6488,62 @@ func (m *ResponseApplySnapshotChunk) MarshalToSizedBuffer(dAtA []byte) (int, err
 	return len(dAtA) - i, nil
 }
 
+func (m *ResponseBeginRecheckTx) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *ResponseBeginRecheckTx) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *ResponseBeginRecheckTx) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.Code != 0 {
+		i = encodeVarintTypes(dAtA, i, uint64(m.Code))
+		i--
+		dAtA[i] = 0x8
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *ResponseEndRecheckTx) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *ResponseEndRecheckTx) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *ResponseEndRecheckTx) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.Code != 0 {
+		i = encodeVarintTypes(dAtA, i, uint64(m.Code))
+		i--
+		dAtA[i] = 0x8
+	}
+	return len(dAtA) - i, nil
+}
+
 func (m *ConsensusParams) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
@@ -6451,12 +6972,12 @@ func (m *Evidence) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i--
 		dAtA[i] = 0x28
 	}
-	n49, err49 := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.Time, dAtA[i-github_com_gogo_protobuf_types.SizeOfStdTime(m.Time):])
-	if err49 != nil {
-		return 0, err49
+	n54, err54 := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.Time, dAtA[i-github_com_gogo_protobuf_types.SizeOfStdTime(m.Time):])
+	if err54 != nil {
+		return 0, err54
 	}
-	i -= n49
-	i = encodeVarintTypes(dAtA, i, uint64(n49))
+	i -= n54
+	i = encodeVarintTypes(dAtA, i, uint64(n54))
 	i--
 	dAtA[i] = 0x22
 	if m.Height != 0 {
@@ -6737,6 +7258,30 @@ func (m *Request_ApplySnapshotChunk) Size() (n int) {
 	}
 	return n
 }
+func (m *Request_BeginRecheckTx) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.BeginRecheckTx != nil {
+		l = m.BeginRecheckTx.Size()
+		n += 2 + l + sovTypes(uint64(l))
+	}
+	return n
+}
+func (m *Request_EndRecheckTx) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.EndRecheckTx != nil {
+		l = m.EndRecheckTx.Size()
+		n += 2 + l + sovTypes(uint64(l))
+	}
+	return n
+}
 func (m *RequestEcho) Size() (n int) {
 	if m == nil {
 		return 0
@@ -6987,6 +7532,29 @@ func (m *RequestApplySnapshotChunk) Size() (n int) {
 	return n
 }
 
+func (m *RequestBeginRecheckTx) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = m.Header.Size()
+	n += 1 + l + sovTypes(uint64(l))
+	return n
+}
+
+func (m *RequestEndRecheckTx) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.Height != 0 {
+		n += 1 + sovTypes(uint64(m.Height))
+	}
+	return n
+}
+
 func (m *Response) Size() (n int) {
 	if m == nil {
 		return 0
@@ -7191,6 +7759,30 @@ func (m *Response_ApplySnapshotChunk) Size() (n int) {
 	}
 	return n
 }
+func (m *Response_BeginRecheckTx) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.BeginRecheckTx != nil {
+		l = m.BeginRecheckTx.Size()
+		n += 2 + l + sovTypes(uint64(l))
+	}
+	return n
+}
+func (m *Response_EndRecheckTx) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.EndRecheckTx != nil {
+		l = m.EndRecheckTx.Size()
+		n += 2 + l + sovTypes(uint64(l))
+	}
+	return n
+}
 func (m *ResponseException) Size() (n int) {
 	if m == nil {
 		return 0
@@ -7539,6 +8131,30 @@ func (m *ResponseApplySnapshotChunk) Size() (n int) {
 	return n
 }
 
+func (m *ResponseBeginRecheckTx) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.Code != 0 {
+		n += 1 + sovTypes(uint64(m.Code))
+	}
+	return n
+}
+
+func (m *ResponseEndRecheckTx) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.Code != 0 {
+		n += 1 + sovTypes(uint64(m.Code))
+	}
+	return n
+}
+
 func (m *ConsensusParams) Size() (n int) {
 	if m == nil {
 		return 0
@@ -8309,14 +8925,84 @@ func (m *Request) Unmarshal(dAtA []byte) error {
 			}
 			m.Value = &Request_ApplySnapshotChunk{v}
 			iNdEx = postIndex
-		default:
-			iNdEx = preIndex
-			skippy, err := skipTypes(dAtA[iNdEx:])
-			if err != nil {
-				return err
-			}
-			if (skippy < 0) || (iNdEx+skippy) < 0 {
-				return ErrInvalidLengthTypes
+		case 100:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field BeginRecheckTx", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTypes
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthTypes
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthTypes
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			v := &RequestBeginRecheckTx{}
+			if err := v.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			m.Value = &Request_BeginRecheckTx{v}
+			iNdEx = postIndex
+		case 101:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field EndRecheckTx", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTypes
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthTypes
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthTypes
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			v := &RequestEndRecheckTx{}
+			if err := v.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			m.Value = &Request_EndRecheckTx{v}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipTypes(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthTypes
 			}
 			if (iNdEx + skippy) > l {
 				return io.ErrUnexpectedEOF
@@ -9991,6 +10677,158 @@ func (m *RequestApplySnapshotChunk) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *RequestBeginRecheckTx) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowTypes
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: RequestBeginRecheckTx: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: RequestBeginRecheckTx: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Header", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTypes
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthTypes
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthTypes
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if err := m.Header.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipTypes(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthTypes
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *RequestEndRecheckTx) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowTypes
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: RequestEndRecheckTx: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: RequestEndRecheckTx: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Height", wireType)
+			}
+			m.Height = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTypes
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Height |= int64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipTypes(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthTypes
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func (m *Response) Unmarshal(dAtA []byte) error {
 	l := len(dAtA)
 	iNdEx := 0
@@ -10580,6 +11418,76 @@ func (m *Response) Unmarshal(dAtA []byte) error {
 			}
 			m.Value = &Response_ApplySnapshotChunk{v}
 			iNdEx = postIndex
+		case 100:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field BeginRecheckTx", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTypes
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthTypes
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthTypes
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			v := &ResponseBeginRecheckTx{}
+			if err := v.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			m.Value = &Response_BeginRecheckTx{v}
+			iNdEx = postIndex
+		case 101:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field EndRecheckTx", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTypes
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthTypes
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthTypes
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			v := &ResponseEndRecheckTx{}
+			if err := v.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			m.Value = &Response_EndRecheckTx{v}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipTypes(dAtA[iNdEx:])
@@ -12892,6 +13800,144 @@ func (m *ResponseApplySnapshotChunk) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *ResponseBeginRecheckTx) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowTypes
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: ResponseBeginRecheckTx: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: ResponseBeginRecheckTx: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Code", wireType)
+			}
+			m.Code = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTypes
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Code |= uint32(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipTypes(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthTypes
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *ResponseEndRecheckTx) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowTypes
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: ResponseEndRecheckTx: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: ResponseEndRecheckTx: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Code", wireType)
+			}
+			m.Code = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTypes
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Code |= uint32(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipTypes(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthTypes
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func (m *ConsensusParams) Unmarshal(dAtA []byte) error {
 	l := len(dAtA)
 	iNdEx := 0
diff --git a/config/toml.go b/config/toml.go
index 9b11b21a7..fe797e95b 100644
--- a/config/toml.go
+++ b/config/toml.go
@@ -556,7 +556,7 @@ var testGenesisFmt = `{
   "validators": [
     {
       "pub_key": {
-        "type": "tendermint/PubKeyEd25519",
+        "type": "ostracon/PubKeyEd25519",
         "value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="
       },
       "power": "10",
@@ -569,11 +569,11 @@ var testGenesisFmt = `{
 var testPrivValidatorKey = `{
   "address": "A3258DCBF45DCA0DF052981870F2D1441A36D145",
   "pub_key": {
-    "type": "tendermint/PubKeyEd25519",
+    "type": "ostracon/PubKeyEd25519",
     "value": "AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="
   },
   "priv_key": {
-    "type": "tendermint/PrivKeyEd25519",
+    "type": "ostracon/PrivKeyEd25519",
     "value": "EVkqJO/jIXp3rkASXfh9YnyToYXRXhBr6g9cQVxPFnQBP/5povV4HTjvsy530kybxKHwEi85iU8YL0qQhSYVoQ=="
   }
 }`
diff --git a/consensus/byzantine_test.go b/consensus/byzantine_test.go
index 33b65ac68..4639d34bd 100644
--- a/consensus/byzantine_test.go
+++ b/consensus/byzantine_test.go
@@ -52,7 +52,7 @@ func TestByzantinePrevoteEquivocation(t *testing.T) {
 		defer os.RemoveAll(thisConfig.RootDir)
 		ensureDir(path.Dir(thisConfig.Consensus.WalFile()), 0700) // dir for wal
 		app := appFunc()
-		vals := types.TM2PB.ValidatorUpdates(state.Validators)
+		vals := types.OST2PB.ValidatorUpdates(state.Validators)
 		app.InitChain(abci.RequestInitChain{Validators: vals})
 
 		blockDB := memdb.NewDB()
diff --git a/consensus/common_test.go b/consensus/common_test.go
index 1c87c8144..9330f8e31 100644
--- a/consensus/common_test.go
+++ b/consensus/common_test.go
@@ -689,7 +689,7 @@ func randConsensusNet(nValidators int, testName string, tickerFunc func() Timeou
 		}
 		ensureDir(filepath.Dir(thisConfig.Consensus.WalFile()), 0700) // dir for wal
 		app := appFunc()
-		vals := types.TM2PB.ValidatorUpdates(state.Validators)
+		vals := types.OST2PB.ValidatorUpdates(state.Validators)
 		app.InitChain(abci.RequestInitChain{Validators: vals})
 
 		css[i] = newStateWithConfigAndBlockStore(thisConfig, state, privVals[i], app, stateDB)
@@ -743,7 +743,7 @@ func randConsensusNetWithPeers(
 		}
 
 		app := appFunc(path.Join(config.DBDir(), fmt.Sprintf("%s_%d", testName, i)))
-		vals := types.TM2PB.ValidatorUpdates(state.Validators)
+		vals := types.OST2PB.ValidatorUpdates(state.Validators)
 		if _, ok := app.(*kvstore.PersistentKVStoreApplication); ok {
 			// simulate handshake, receive app version. If don't do this, replay test will fail
 			state.Version.Consensus.App = kvstore.ProtocolVersion
diff --git a/consensus/mempool_test.go b/consensus/mempool_test.go
index bf02768cf..23f487af3 100644
--- a/consensus/mempool_test.go
+++ b/consensus/mempool_test.go
@@ -4,6 +4,7 @@ import (
 	"encoding/binary"
 	"fmt"
 	"os"
+	"sync"
 	"testing"
 	"time"
 
@@ -153,6 +154,14 @@ func TestMempoolRmBadTx(t *testing.T) {
 	resCommit := app.Commit()
 	assert.True(t, len(resCommit.Data) > 0)
 
+	resBeginRecheckTx := app.BeginRecheckTx(abci.RequestBeginRecheckTx{})
+	assert.Equal(t, code.CodeTypeOK, resBeginRecheckTx.Code)
+
+	// There is no tx to recheck
+
+	resEndRecheckTx := app.EndRecheckTx(abci.RequestEndRecheckTx{})
+	assert.Equal(t, code.CodeTypeOK, resEndRecheckTx.Code)
+
 	emptyMempoolCh := make(chan struct{})
 	checkTxRespCh := make(chan struct{})
 	go func() {
@@ -207,8 +216,9 @@ func TestMempoolRmBadTx(t *testing.T) {
 type CounterApplication struct {
 	abci.BaseApplication
 
-	txCount        int
-	mempoolTxCount int
+	txCount           int
+	mempoolTxCount    int
+	mempoolTxCountMtx sync.Mutex
 }
 
 func NewCounterApplication() *CounterApplication {
@@ -232,6 +242,8 @@ func (app *CounterApplication) DeliverTx(req abci.RequestDeliverTx) abci.Respons
 
 func (app *CounterApplication) CheckTx(req abci.RequestCheckTx) abci.ResponseCheckTx {
 	txValue := txAsUint64(req.Tx)
+	app.mempoolTxCountMtx.Lock()
+	defer app.mempoolTxCountMtx.Unlock()
 	if txValue != uint64(app.mempoolTxCount) {
 		return abci.ResponseCheckTx{
 			Code: code.CodeTypeBadNonce,
@@ -241,6 +253,11 @@ func (app *CounterApplication) CheckTx(req abci.RequestCheckTx) abci.ResponseChe
 	return abci.ResponseCheckTx{Code: code.CodeTypeOK}
 }
 
+func (app *CounterApplication) BeginRecheckTx(abci.RequestBeginRecheckTx) abci.ResponseBeginRecheckTx {
+	app.mempoolTxCount = app.txCount
+	return abci.ResponseBeginRecheckTx{Code: code.CodeTypeOK}
+}
+
 func txAsUint64(tx []byte) uint64 {
 	tx8 := make([]byte, 8)
 	copy(tx8[len(tx8)-len(tx):], tx)
@@ -248,7 +265,6 @@ func txAsUint64(tx []byte) uint64 {
 }
 
 func (app *CounterApplication) Commit() abci.ResponseCommit {
-	app.mempoolTxCount = app.txCount
 	if app.txCount == 0 {
 		return abci.ResponseCommit{}
 	}
diff --git a/consensus/reactor_test.go b/consensus/reactor_test.go
index 7471a3e71..0dfe4d965 100644
--- a/consensus/reactor_test.go
+++ b/consensus/reactor_test.go
@@ -142,7 +142,7 @@ func TestReactorWithEvidence(t *testing.T) {
 		defer os.RemoveAll(thisConfig.RootDir)
 		ensureDir(path.Dir(thisConfig.Consensus.WalFile()), 0700) // dir for wal
 		app := appFunc()
-		vals := types.TM2PB.ValidatorUpdates(state.Validators)
+		vals := types.OST2PB.ValidatorUpdates(state.Validators)
 		app.InitChain(abci.RequestInitChain{Validators: vals})
 
 		pv := privVals[i]
diff --git a/consensus/replay.go b/consensus/replay.go
index f96a59cfd..9c5b0be41 100644
--- a/consensus/replay.go
+++ b/consensus/replay.go
@@ -306,8 +306,8 @@ func (h *Handshaker) ReplayBlocks(
 			validators[i] = types.NewValidator(val.PubKey, val.Power)
 		}
 		validatorSet := types.NewValidatorSet(validators)
-		nextVals := types.TM2PB.ValidatorUpdates(validatorSet)
-		csParams := types.TM2PB.ConsensusParams(h.genDoc.ConsensusParams)
+		nextVals := types.OST2PB.ValidatorUpdates(validatorSet)
+		csParams := types.OST2PB.ConsensusParams(h.genDoc.ConsensusParams)
 		req := abci.RequestInitChain{
 			Time:            h.genDoc.GenesisTime,
 			ChainId:         h.genDoc.ChainID,
diff --git a/consensus/replay_stubs.go b/consensus/replay_stubs.go
index 39c84b578..5c94c9fce 100644
--- a/consensus/replay_stubs.go
+++ b/consensus/replay_stubs.go
@@ -24,8 +24,7 @@ func (emptyMempool) CheckTx(_ types.Tx, _ func(*abci.Response), _ mempl.TxInfo)
 func (emptyMempool) ReapMaxBytesMaxGas(_, _ int64) types.Txs { return types.Txs{} }
 func (emptyMempool) ReapMaxTxs(n int) types.Txs              { return types.Txs{} }
 func (emptyMempool) Update(
-	_ int64,
-	_ types.Txs,
+	_ *types.Block,
 	_ []*abci.ResponseDeliverTx,
 	_ mempl.PreCheckFunc,
 	_ mempl.PostCheckFunc,
diff --git a/consensus/replay_test.go b/consensus/replay_test.go
index d05112181..d5557c72f 100644
--- a/consensus/replay_test.go
+++ b/consensus/replay_test.go
@@ -798,7 +798,7 @@ func buildAppStateFromChain(proxyApp proxy.AppConns, stateStore sm.Store,
 	defer proxyApp.Stop() //nolint:errcheck // ignore
 
 	state.Version.Consensus.App = kvstore.ProtocolVersion // simulate handshake, receive app version
-	validators := types.TM2PB.ValidatorUpdates(state.Validators)
+	validators := types.OST2PB.ValidatorUpdates(state.Validators)
 	if _, err := proxyApp.Consensus().InitChainSync(abci.RequestInitChain{
 		Validators: validators,
 	}); err != nil {
@@ -848,7 +848,7 @@ func buildTMStateFromChain(
 	defer proxyApp.Stop() //nolint:errcheck
 
 	state.Version.Consensus.App = kvstore.ProtocolVersion // simulate handshake, receive app version
-	validators := types.TM2PB.ValidatorUpdates(state.Validators)
+	validators := types.OST2PB.ValidatorUpdates(state.Validators)
 	if _, err := proxyApp.Consensus().InitChainSync(abci.RequestInitChain{
 		Validators: validators,
 	}); err != nil {
@@ -1218,7 +1218,7 @@ func (bs *mockBlockStore) PruneBlocks(height int64) (uint64, error) {
 func TestHandshakeUpdatesValidators(t *testing.T) {
 	val, _ := types.RandValidator(true, 10)
 	vals := types.NewValidatorSet([]*types.Validator{val})
-	app := &initChainApp{vals: types.TM2PB.ValidatorUpdates(vals)}
+	app := &initChainApp{vals: types.OST2PB.ValidatorUpdates(vals)}
 	clientCreator := proxy.NewLocalClientCreator(app)
 
 	config := ResetConfig("handshake_test_")
diff --git a/crypto/README.md b/crypto/README.md
index 57ea9c716..c13ab0394 100644
--- a/crypto/README.md
+++ b/crypto/README.md
@@ -22,7 +22,7 @@ JSON encoding is done using tendermint's internal json encoder. For more informa
 Example JSON encodings:
 
 ed25519.PrivKey     - {"type":"tendermint/PrivKeyEd25519","value":"EVkqJO/jIXp3rkASXfh9YnyToYXRXhBr6g9cQVxPFnQBP/5povV4HTjvsy530kybxKHwEi85iU8YL0qQhSYVoQ=="}
-ed25519.PubKey      - {"type":"tendermint/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="}
+ed25519.PubKey      - {"type":"ostracon/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="}
 sr25519.PrivKeySr25519   - {"type":"tendermint/PrivKeySr25519","value":"xtYVH8UCIqfrY8FIFc0QEpAEBShSG4NT0zlEOVSZ2w4="}
 sr25519.PubKeySr25519    - {"type":"tendermint/PubKeySr25519","value":"8sKBLKQ/OoXMcAJVxBqz1U7TyxRFQ5cmliuHy4MrF0s="}
 crypto.PrivKeySecp256k1   - {"type":"tendermint/PrivKeySecp256k1","value":"zx4Pnh67N+g2V+5vZbQzEyRerX9c4ccNZOVzM9RvJ0Y="}
diff --git a/crypto/ed25519/ed25519.go b/crypto/ed25519/ed25519.go
index bc795b33b..550187b78 100644
--- a/crypto/ed25519/ed25519.go
+++ b/crypto/ed25519/ed25519.go
@@ -18,8 +18,8 @@ import (
 var _ crypto.PrivKey = PrivKey{}
 
 const (
-	PrivKeyName = "tendermint/PrivKeyEd25519"
-	PubKeyName  = "tendermint/PubKeyEd25519"
+	PrivKeyName = "ostracon/PrivKeyEd25519"
+	PubKeyName  = "ostracon/PubKeyEd25519"
 	// PubKeySize is is the size, in bytes, of public keys as used in this package.
 	PubKeySize = 32
 	// PrivateKeySize is the size, in bytes, of private keys as used in this package.
diff --git a/crypto/secp256k1/secp256k1.go b/crypto/secp256k1/secp256k1.go
index 8ce0e83ca..f94aeb863 100644
--- a/crypto/secp256k1/secp256k1.go
+++ b/crypto/secp256k1/secp256k1.go
@@ -17,8 +17,8 @@ import (
 
 //-------------------------------------
 const (
-	PrivKeyName = "tendermint/PrivKeySecp256k1"
-	PubKeyName  = "tendermint/PubKeySecp256k1"
+	PrivKeyName = "ostracon/PrivKeySecp256k1"
+	PubKeyName  = "ostracon/PubKeySecp256k1"
 
 	KeyType     = "secp256k1"
 	PrivKeySize = 32
diff --git a/crypto/sr25519/encoding.go b/crypto/sr25519/encoding.go
index e04975164..b55e11c9a 100644
--- a/crypto/sr25519/encoding.go
+++ b/crypto/sr25519/encoding.go
@@ -8,8 +8,8 @@ import (
 var _ crypto.PrivKey = PrivKey{}
 
 const (
-	PrivKeyName = "tendermint/PrivKeySr25519"
-	PubKeyName  = "tendermint/PubKeySr25519"
+	PrivKeyName = "ostracon/PrivKeySr25519"
+	PubKeyName  = "ostracon/PubKeySr25519"
 
 	// SignatureSize is the size of an Edwards25519 signature. Namely the size of a compressed
 	// Sr25519 point, and a field element. Both of which are 32 bytes.
diff --git a/docs/tendermint-core/subscription.md b/docs/tendermint-core/subscription.md
index 067d0bf51..3bf379e70 100644
--- a/docs/tendermint-core/subscription.md
+++ b/docs/tendermint-core/subscription.md
@@ -61,7 +61,7 @@ Response:
                 {
                   "address": "09EAD022FD25DE3A02E64B0FE9610B1417183EE4",
                   "pub_key": {
-                    "type": "tendermint/PubKeyEd25519",
+                    "type": "ostracon/PubKeyEd25519",
                     "value": "ww0z4WaZ0Xg+YI10w43wTWbBmM3dpVza4mmSQYsd0ck="
                   },
                   "voting_power": "10",
diff --git a/docs/tendermint-core/using-tendermint.md b/docs/tendermint-core/using-tendermint.md
index bf39d8678..043826a03 100644
--- a/docs/tendermint-core/using-tendermint.md
+++ b/docs/tendermint-core/using-tendermint.md
@@ -113,7 +113,7 @@ definition](https://github.com/tendermint/tendermint/blob/master/types/genesis.g
     {
       "address": "B547AB87E79F75A4A3198C57A8C2FDAF8628CB47",
       "pub_key": {
-        "type": "tendermint/PubKeyEd25519",
+        "type": "ostracon/PubKeyEd25519",
         "value": "P/V6GHuZrb8rs/k1oBorxc6vyXMlnzhJmv7LmjELDys="
       },
       "power": "10",
@@ -355,7 +355,7 @@ When `tendermint init` is run, both a `genesis.json` and
     {
       "pub_key" : {
         "value" : "h3hk+QE8c6QLTySp8TcfzclJw/BG79ziGB/pIA+DfPE=",
-        "type" : "tendermint/PubKeyEd25519"
+        "type" : "ostracon/PubKeyEd25519"
       },
       "power" : 10,
       "name" : ""
@@ -376,7 +376,7 @@ And the `priv_validator_key.json`:
   "address" : "B788DEDE4F50AD8BC9462DE76741CCAFF87D51E2",
   "pub_key" : {
     "value" : "h3hk+QE8c6QLTySp8TcfzclJw/BG79ziGB/pIA+DfPE=",
-    "type" : "tendermint/PubKeyEd25519"
+    "type" : "ostracon/PubKeyEd25519"
   },
   "last_height" : "0",
   "priv_key" : {
@@ -501,7 +501,7 @@ Now we can update our genesis file. For instance, if the new
   "address" : "5AF49D2A2D4F5AD4C7C8C4CC2FB020131E9C4902",
   "pub_key" : {
     "value" : "l9X9+fjkeBzDfPGbUM7AMIRE6uJN78zN5+lk5OYotek=",
-    "type" : "tendermint/PubKeyEd25519"
+    "type" : "ostracon/PubKeyEd25519"
   },
   "priv_key" : {
     "value" : "EDJY9W6zlAw+su6ITgTKg2nTZcHAH1NMTW5iwlgmNDuX1f35+OR4HMN88ZtQzsAwhETq4k3vzM3n6WTk5ii16Q==",
@@ -521,7 +521,7 @@ then the new `genesis.json` will be:
     {
       "pub_key" : {
         "value" : "h3hk+QE8c6QLTySp8TcfzclJw/BG79ziGB/pIA+DfPE=",
-        "type" : "tendermint/PubKeyEd25519"
+        "type" : "ostracon/PubKeyEd25519"
       },
       "power" : 10,
       "name" : ""
@@ -529,7 +529,7 @@ then the new `genesis.json` will be:
     {
       "pub_key" : {
         "value" : "l9X9+fjkeBzDfPGbUM7AMIRE6uJN78zN5+lk5OYotek=",
-        "type" : "tendermint/PubKeyEd25519"
+        "type" : "ostracon/PubKeyEd25519"
       },
       "power" : 10,
       "name" : ""
diff --git a/mempool/cache_test.go b/mempool/cache_test.go
index 2187fed45..e36f36740 100644
--- a/mempool/cache_test.go
+++ b/mempool/cache_test.go
@@ -68,7 +68,8 @@ func TestCacheAfterUpdate(t *testing.T) {
 			tx := types.Tx{byte(v)}
 			updateTxs = append(updateTxs, tx)
 		}
-		err := mempool.Update(int64(tcIndex), updateTxs, abciResponses(len(updateTxs), abci.CodeTypeOK), nil, nil)
+		err := mempool.Update(newTestBlock(int64(tcIndex), updateTxs),
+			abciResponses(len(updateTxs), abci.CodeTypeOK), nil, nil)
 		require.NoError(t, err)
 
 		for _, v := range tc.reAddIndices {
diff --git a/mempool/clist_mempool.go b/mempool/clist_mempool.go
index 383003929..234a4a140 100644
--- a/mempool/clist_mempool.go
+++ b/mempool/clist_mempool.go
@@ -20,6 +20,7 @@ import (
 	"github.com/line/ostracon/p2p"
 	"github.com/line/ostracon/proxy"
 	"github.com/line/ostracon/types"
+	"github.com/pkg/errors"
 )
 
 // TxKeySize is the size of the transaction key index
@@ -568,14 +569,13 @@ func (mem *CListMempool) ReapMaxTxs(max int) types.Txs {
 
 // Lock() must be help by the caller during execution.
 func (mem *CListMempool) Update(
-	height int64,
-	txs types.Txs,
+	block *types.Block,
 	deliverTxResponses []*abci.ResponseDeliverTx,
 	preCheck PreCheckFunc,
 	postCheck PostCheckFunc,
 ) error {
 	// Set height
-	mem.height = height
+	mem.height = block.Height
 	mem.notifiedTxsAvailable = false
 
 	if preCheck != nil {
@@ -585,7 +585,7 @@ func (mem *CListMempool) Update(
 		mem.postCheck = postCheck
 	}
 
-	for i, tx := range txs {
+	for i, tx := range block.Txs {
 		if deliverTxResponses[i].Code == abci.CodeTypeOK {
 			// Add valid committed tx to the cache (if missing).
 			_ = mem.cache.Push(tx)
@@ -614,8 +614,28 @@ func (mem *CListMempool) Update(
 	recheckStartTime := time.Now().UnixNano()
 	if mem.Size() > 0 {
 		if mem.config.Recheck {
-			mem.logger.Debug("recheck txs", "numtxs", mem.Size(), "height", height)
-			mem.recheckTxs()
+			mem.logger.Debug("recheck txs", "numtxs", mem.Size(), "height", block.Height)
+			res, err := mem.proxyAppConn.BeginRecheckTxSync(abci.RequestBeginRecheckTx{
+				Header: types.OST2PB.Header(&block.Header),
+			})
+			if res.Code == abci.CodeTypeOK && err == nil {
+				mem.recheckTxs()
+				res2, err2 := mem.proxyAppConn.EndRecheckTxSync(abci.RequestEndRecheckTx{Height: block.Height})
+				if res2.Code != abci.CodeTypeOK {
+					return errors.New("the function EndRecheckTxSync does not respond CodeTypeOK")
+				}
+				if err2 != nil {
+					return errors.Wrap(err2, "the function EndRecheckTxSync returns an error")
+				}
+			} else {
+				if res.Code != abci.CodeTypeOK {
+					return errors.New("the function BeginRecheckTxSync does not respond CodeTypeOK")
+				}
+				if err != nil {
+					return errors.Wrap(err, "the function BeginRecheckTxSync returns an error")
+				}
+			}
+
 			// At this point, mem.txs are being rechecked.
 			// mem.recheckCursor re-scans mem.txs and possibly removes some txs.
 			// Before mem.Reap(), we should wait for mem.recheckCursor to be nil.
diff --git a/mempool/clist_mempool_test.go b/mempool/clist_mempool_test.go
index 776064cc1..f8b2c2b87 100644
--- a/mempool/clist_mempool_test.go
+++ b/mempool/clist_mempool_test.go
@@ -170,7 +170,8 @@ func TestMempoolFilters(t *testing.T) {
 		{10, PreCheckMaxBytes(22), PostCheckMaxGas(0), 0},
 	}
 	for tcIndex, tt := range tests {
-		err := mempool.Update(1, emptyTxArr, abciResponses(len(emptyTxArr), abci.CodeTypeOK), tt.preFilter, tt.postFilter)
+		err := mempool.Update(newTestBlock(1, emptyTxArr),
+			abciResponses(len(emptyTxArr), abci.CodeTypeOK), tt.preFilter, tt.postFilter)
 		require.NoError(t, err)
 		checkTxs(t, mempool, tt.numTxsToCreate, UnknownPeerID)
 		require.Equal(t, tt.expectedNumTxs, mempool.Size(), "mempool had the incorrect size, on test case %d", tcIndex)
@@ -186,7 +187,8 @@ func TestMempoolUpdate(t *testing.T) {
 
 	// 1. Adds valid txs to the cache
 	{
-		err := mempool.Update(1, []types.Tx{[]byte{0x01}}, abciResponses(1, abci.CodeTypeOK), nil, nil)
+		err := mempool.Update(newTestBlock(1, []types.Tx{[]byte{0x01}}),
+			abciResponses(1, abci.CodeTypeOK), nil, nil)
 		require.NoError(t, err)
 		err = mempool.CheckTx([]byte{0x01}, nil, TxInfo{})
 		if assert.Error(t, err) {
@@ -198,7 +200,7 @@ func TestMempoolUpdate(t *testing.T) {
 	{
 		err := mempool.CheckTx([]byte{0x02}, nil, TxInfo{})
 		require.NoError(t, err)
-		err = mempool.Update(1, []types.Tx{[]byte{0x02}}, abciResponses(1, abci.CodeTypeOK), nil, nil)
+		err = mempool.Update(newTestBlock(1, []types.Tx{[]byte{0x02}}), abciResponses(1, abci.CodeTypeOK), nil, nil)
 		require.NoError(t, err)
 		assert.Zero(t, mempool.Size())
 	}
@@ -207,7 +209,7 @@ func TestMempoolUpdate(t *testing.T) {
 	{
 		err := mempool.CheckTx([]byte{0x03}, nil, TxInfo{})
 		require.NoError(t, err)
-		err = mempool.Update(1, []types.Tx{[]byte{0x03}}, abciResponses(1, 1), nil, nil)
+		err = mempool.Update(newTestBlock(1, []types.Tx{[]byte{0x03}}), abciResponses(1, 1), nil, nil)
 		require.NoError(t, err)
 		assert.Zero(t, mempool.Size())
 
@@ -238,7 +240,7 @@ func TestMempool_KeepInvalidTxsInCache(t *testing.T) {
 		// simulate new block
 		_ = app.DeliverTx(abci.RequestDeliverTx{Tx: a})
 		_ = app.DeliverTx(abci.RequestDeliverTx{Tx: b})
-		err = mempool.Update(1, []types.Tx{a, b},
+		err = mempool.Update(newTestBlock(1, []types.Tx{a, b}),
 			[]*abci.ResponseDeliverTx{{Code: abci.CodeTypeOK}, {Code: 2}}, nil, nil)
 		require.NoError(t, err)
 
@@ -294,7 +296,8 @@ func TestTxsAvailable(t *testing.T) {
 	// it should fire once now for the new height
 	// since there are still txs left
 	committedTxs, txs := txs[:50], txs[50:]
-	if err := mempool.Update(1, committedTxs, abciResponses(len(committedTxs), abci.CodeTypeOK), nil, nil); err != nil {
+	if err := mempool.Update(newTestBlock(1, committedTxs),
+		abciResponses(len(committedTxs), abci.CodeTypeOK), nil, nil); err != nil {
 		t.Error(err)
 	}
 	ensureFire(t, mempool.TxsAvailable(), timeoutMS)
@@ -306,7 +309,8 @@ func TestTxsAvailable(t *testing.T) {
 
 	// now call update with all the txs. it should not fire as there are no txs left
 	committedTxs = append(txs, moreTxs...) //nolint: gocritic
-	if err := mempool.Update(2, committedTxs, abciResponses(len(committedTxs), abci.CodeTypeOK), nil, nil); err != nil {
+	if err := mempool.Update(newTestBlock(2, committedTxs),
+		abciResponses(len(committedTxs), abci.CodeTypeOK), nil, nil); err != nil {
 		t.Error(err)
 	}
 	ensureNoFire(t, mempool.TxsAvailable(), timeoutMS)
@@ -365,7 +369,8 @@ func TestSerialReap(t *testing.T) {
 			binary.BigEndian.PutUint64(txBytes, uint64(i))
 			txs = append(txs, txBytes)
 		}
-		if err := mempool.Update(0, txs, abciResponses(len(txs), abci.CodeTypeOK), nil, nil); err != nil {
+		if err := mempool.Update(newTestBlock(0, txs),
+			abciResponses(len(txs), abci.CodeTypeOK), nil, nil); err != nil {
 			t.Error(err)
 		}
 	}
@@ -536,7 +541,8 @@ func TestMempoolTxsBytes(t *testing.T) {
 	assert.EqualValues(t, 1, mempool.TxsBytes())
 
 	// 3. zero again after tx is removed by Update
-	err = mempool.Update(1, []types.Tx{[]byte{0x01}}, abciResponses(1, abci.CodeTypeOK), nil, nil)
+	err = mempool.Update(newTestBlock(1, []types.Tx{[]byte{0x01}}),
+		abciResponses(1, abci.CodeTypeOK), nil, nil)
 	require.NoError(t, err)
 	assert.EqualValues(t, 0, mempool.TxsBytes())
 
@@ -586,7 +592,7 @@ func TestMempoolTxsBytes(t *testing.T) {
 	require.NotEmpty(t, res2.Data)
 
 	// Pretend like we committed nothing so txBytes gets rechecked and removed.
-	err = mempool.Update(1, []types.Tx{}, abciResponses(0, abci.CodeTypeOK), nil, nil)
+	err = mempool.Update(newTestBlock(1, []types.Tx{}), abciResponses(0, abci.CodeTypeOK), nil, nil)
 	require.NoError(t, err)
 	assert.EqualValues(t, 0, mempool.TxsBytes())
 
@@ -641,6 +647,17 @@ func TestMempoolRemoteAppConcurrency(t *testing.T) {
 	require.NoError(t, err)
 }
 
+func newTestBlock(height int64, txs types.Txs) *types.Block {
+	return &types.Block{
+		Header: types.Header{
+			Height: height,
+		},
+		Data: types.Data{
+			Txs: txs,
+		},
+	}
+}
+
 // caller must close server
 func newRemoteApp(
 	t *testing.T,
diff --git a/mempool/mempool.go b/mempool/mempool.go
index cef9c64bf..217b29540 100644
--- a/mempool/mempool.go
+++ b/mempool/mempool.go
@@ -39,8 +39,7 @@ type Mempool interface {
 	// NOTE: this should be called *after* block is committed by consensus.
 	// NOTE: Lock/Unlock must be managed by caller
 	Update(
-		blockHeight int64,
-		blockTxs types.Txs,
+		block *types.Block,
 		deliverTxResponses []*abci.ResponseDeliverTx,
 		newPreFn PreCheckFunc,
 		newPostFn PostCheckFunc,
diff --git a/mempool/mock/mempool.go b/mempool/mock/mempool.go
index c8b328194..de0b65d4c 100644
--- a/mempool/mock/mempool.go
+++ b/mempool/mock/mempool.go
@@ -21,8 +21,7 @@ func (Mempool) CheckTx(_ types.Tx, _ func(*abci.Response), _ mempl.TxInfo) error
 func (Mempool) ReapMaxBytesMaxGas(_, _ int64) types.Txs { return types.Txs{} }
 func (Mempool) ReapMaxTxs(n int) types.Txs              { return types.Txs{} }
 func (Mempool) Update(
-	_ int64,
-	_ types.Txs,
+	_ *types.Block,
 	_ []*abci.ResponseDeliverTx,
 	_ mempl.PreCheckFunc,
 	_ mempl.PostCheckFunc,
diff --git a/mempool/reactor_test.go b/mempool/reactor_test.go
index 3c67644bc..d4cc3d03a 100644
--- a/mempool/reactor_test.go
+++ b/mempool/reactor_test.go
@@ -102,7 +102,7 @@ func TestReactorConcurrency(t *testing.T) {
 			for i := range txs {
 				deliverTxResponses[i] = &abci.ResponseDeliverTx{Code: 0}
 			}
-			err := reactors[0].mempool.Update(1, txs, deliverTxResponses, nil, nil)
+			err := reactors[0].mempool.Update(newTestBlock(1, txs), deliverTxResponses, nil, nil)
 			assert.NoError(t, err)
 		}()
 
@@ -114,7 +114,8 @@ func TestReactorConcurrency(t *testing.T) {
 
 			reactors[1].mempool.Lock()
 			defer reactors[1].mempool.Unlock()
-			err := reactors[1].mempool.Update(1, []types.Tx{}, make([]*abci.ResponseDeliverTx, 0), nil, nil)
+			err := reactors[1].mempool.Update(newTestBlock(1, []types.Tx{}),
+				make([]*abci.ResponseDeliverTx, 0), nil, nil)
 			assert.NoError(t, err)
 		}()
 
diff --git a/privval/file_test.go b/privval/file_test.go
index 1acdb6438..29d6fb880 100644
--- a/privval/file_test.go
+++ b/privval/file_test.go
@@ -132,11 +132,11 @@ func TestUnmarshalValidatorKey(t *testing.T) {
 	serialized := fmt.Sprintf(`{
   "address": "%s",
   "pub_key": {
-    "type": "tendermint/PubKeyEd25519",
+    "type": "ostracon/PubKeyEd25519",
     "value": "%s"
   },
   "priv_key": {
-    "type": "tendermint/PrivKeyEd25519",
+    "type": "ostracon/PrivKeyEd25519",
     "value": "%s"
   }
 }`, addr, pubB64, privB64)
diff --git a/proto/ostracon/abci/types.proto b/proto/ostracon/abci/types.proto
index 467499ac5..05927fe72 100644
--- a/proto/ostracon/abci/types.proto
+++ b/proto/ostracon/abci/types.proto
@@ -36,6 +36,8 @@ message Request {
     RequestOfferSnapshot      offer_snapshot       = 13;
     RequestLoadSnapshotChunk  load_snapshot_chunk  = 14;
     RequestApplySnapshotChunk apply_snapshot_chunk = 15;
+    RequestBeginRecheckTx     begin_recheck_tx     = 100; // 16~99 are reserved for merging original tendermint
+    RequestEndRecheckTx       end_recheck_tx       = 101;
   }
 }
 
@@ -125,6 +127,14 @@ message RequestApplySnapshotChunk {
   string sender = 3;
 }
 
+message RequestBeginRecheckTx {
+  ostracon.types.Header header = 1 [(gogoproto.nullable) = false];
+}
+
+message RequestEndRecheckTx {
+  int64 height = 1;
+}
+
 //----------------------------------------
 // Response types
 
@@ -146,6 +156,8 @@ message Response {
     ResponseOfferSnapshot      offer_snapshot       = 14;
     ResponseLoadSnapshotChunk  load_snapshot_chunk  = 15;
     ResponseApplySnapshotChunk apply_snapshot_chunk = 16;
+    ResponseBeginRecheckTx     begin_recheck_tx     = 100; // 17~99 are reserved for merging original tendermint
+    ResponseEndRecheckTx       end_recheck_tx       = 101;
   }
 }
 
@@ -276,6 +288,14 @@ message ResponseApplySnapshotChunk {
   }
 }
 
+message ResponseBeginRecheckTx {
+  uint32 code = 1;
+}
+
+message ResponseEndRecheckTx {
+  uint32 code = 1;
+}
+
 //----------------------------------------
 // Misc.
 
@@ -404,4 +424,6 @@ service ABCIApplication {
   rpc OfferSnapshot(RequestOfferSnapshot) returns (ResponseOfferSnapshot);
   rpc LoadSnapshotChunk(RequestLoadSnapshotChunk) returns (ResponseLoadSnapshotChunk);
   rpc ApplySnapshotChunk(RequestApplySnapshotChunk) returns (ResponseApplySnapshotChunk);
+  rpc BeginRecheckTx(RequestBeginRecheckTx) returns (ResponseBeginRecheckTx);
+  rpc EndRecheckTx(RequestEndRecheckTx) returns (ResponseEndRecheckTx);
 }
diff --git a/proxy/app_conn.go b/proxy/app_conn.go
index 931662433..e012acb36 100644
--- a/proxy/app_conn.go
+++ b/proxy/app_conn.go
@@ -5,7 +5,8 @@ import (
 	"github.com/line/ostracon/abci/types"
 )
 
-//go:generate mockery --case underscore --name AppConnConsensus|AppConnMempool|AppConnQuery|AppConnSnapshot
+//nolint
+//go:generate mockery --case underscore --name AppConnConsensus|AppConnMempool|AppConnQuery|AppConnSnapshot|ClientCreator
 
 //----------------------------------------------------------------------------------------
 // Enforce which abci msgs can be sent on a connection at the type level
@@ -27,7 +28,12 @@ type AppConnMempool interface {
 	Error() error
 
 	CheckTxAsync(types.RequestCheckTx) *abcicli.ReqRes
+	BeginRecheckTxAsync(types.RequestBeginRecheckTx) *abcicli.ReqRes
+	EndRecheckTxAsync(types.RequestEndRecheckTx) *abcicli.ReqRes
+
 	CheckTxSync(types.RequestCheckTx) (*types.ResponseCheckTx, error)
+	BeginRecheckTxSync(types.RequestBeginRecheckTx) (*types.ResponseBeginRecheckTx, error)
+	EndRecheckTxSync(types.RequestEndRecheckTx) (*types.ResponseEndRecheckTx, error)
 
 	FlushAsync() *abcicli.ReqRes
 	FlushSync() error
@@ -126,10 +132,26 @@ func (app *appConnMempool) CheckTxAsync(req types.RequestCheckTx) *abcicli.ReqRe
 	return app.appConn.CheckTxAsync(req)
 }
 
+func (app *appConnMempool) BeginRecheckTxAsync(req types.RequestBeginRecheckTx) *abcicli.ReqRes {
+	return app.appConn.BeginRecheckTxAsync(req)
+}
+
+func (app *appConnMempool) EndRecheckTxAsync(req types.RequestEndRecheckTx) *abcicli.ReqRes {
+	return app.appConn.EndRecheckTxAsync(req)
+}
+
 func (app *appConnMempool) CheckTxSync(req types.RequestCheckTx) (*types.ResponseCheckTx, error) {
 	return app.appConn.CheckTxSync(req)
 }
 
+func (app *appConnMempool) BeginRecheckTxSync(req types.RequestBeginRecheckTx) (*types.ResponseBeginRecheckTx, error) {
+	return app.appConn.BeginRecheckTxSync(req)
+}
+
+func (app *appConnMempool) EndRecheckTxSync(req types.RequestEndRecheckTx) (*types.ResponseEndRecheckTx, error) {
+	return app.appConn.EndRecheckTxSync(req)
+}
+
 //------------------------------------------------
 // Implements AppConnQuery (subset of abcicli.Client)
 
diff --git a/proxy/mocks/app_conn_consensus.go b/proxy/mocks/app_conn_consensus.go
index f635710bd..35b4677a7 100644
--- a/proxy/mocks/app_conn_consensus.go
+++ b/proxy/mocks/app_conn_consensus.go
@@ -1,10 +1,10 @@
-// Code generated by mockery v2.1.0. DO NOT EDIT.
+// Code generated by mockery 2.7.4. DO NOT EDIT.
 
 package mocks
 
 import (
-	mock "github.com/stretchr/testify/mock"
 	abcicli "github.com/line/ostracon/abci/client"
+	mock "github.com/stretchr/testify/mock"
 
 	types "github.com/line/ostracon/abci/types"
 )
diff --git a/proxy/mocks/app_conn_mempool.go b/proxy/mocks/app_conn_mempool.go
index 567dd0854..f64942ccd 100644
--- a/proxy/mocks/app_conn_mempool.go
+++ b/proxy/mocks/app_conn_mempool.go
@@ -1,10 +1,10 @@
-// Code generated by mockery v2.1.0. DO NOT EDIT.
+// Code generated by mockery 2.7.4. DO NOT EDIT.
 
 package mocks
 
 import (
-	mock "github.com/stretchr/testify/mock"
 	abcicli "github.com/line/ostracon/abci/client"
+	mock "github.com/stretchr/testify/mock"
 
 	types "github.com/line/ostracon/abci/types"
 )
@@ -14,6 +14,45 @@ type AppConnMempool struct {
 	mock.Mock
 }
 
+// BeginRecheckTxAsync provides a mock function with given fields: _a0
+func (_m *AppConnMempool) BeginRecheckTxAsync(_a0 types.RequestBeginRecheckTx) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestBeginRecheckTx) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// BeginRecheckTxSync provides a mock function with given fields: _a0
+func (_m *AppConnMempool) BeginRecheckTxSync(_a0 types.RequestBeginRecheckTx) (*types.ResponseBeginRecheckTx, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseBeginRecheckTx
+	if rf, ok := ret.Get(0).(func(types.RequestBeginRecheckTx) *types.ResponseBeginRecheckTx); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseBeginRecheckTx)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestBeginRecheckTx) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // CheckTxAsync provides a mock function with given fields: _a0
 func (_m *AppConnMempool) CheckTxAsync(_a0 types.RequestCheckTx) *abcicli.ReqRes {
 	ret := _m.Called(_a0)
@@ -53,6 +92,45 @@ func (_m *AppConnMempool) CheckTxSync(_a0 types.RequestCheckTx) (*types.Response
 	return r0, r1
 }
 
+// EndRecheckTxAsync provides a mock function with given fields: _a0
+func (_m *AppConnMempool) EndRecheckTxAsync(_a0 types.RequestEndRecheckTx) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestEndRecheckTx) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// EndRecheckTxSync provides a mock function with given fields: _a0
+func (_m *AppConnMempool) EndRecheckTxSync(_a0 types.RequestEndRecheckTx) (*types.ResponseEndRecheckTx, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseEndRecheckTx
+	if rf, ok := ret.Get(0).(func(types.RequestEndRecheckTx) *types.ResponseEndRecheckTx); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseEndRecheckTx)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestEndRecheckTx) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // Error provides a mock function with given fields:
 func (_m *AppConnMempool) Error() error {
 	ret := _m.Called()
diff --git a/proxy/mocks/app_conn_query.go b/proxy/mocks/app_conn_query.go
index 3a4446b5c..eec6053ed 100644
--- a/proxy/mocks/app_conn_query.go
+++ b/proxy/mocks/app_conn_query.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.1.0. DO NOT EDIT.
+// Code generated by mockery 2.7.4. DO NOT EDIT.
 
 package mocks
 
diff --git a/proxy/mocks/app_conn_snapshot.go b/proxy/mocks/app_conn_snapshot.go
index 8811a29c2..0c37135a9 100644
--- a/proxy/mocks/app_conn_snapshot.go
+++ b/proxy/mocks/app_conn_snapshot.go
@@ -1,4 +1,4 @@
-// Code generated by mockery v2.1.0. DO NOT EDIT.
+// Code generated by mockery 2.7.4. DO NOT EDIT.
 
 package mocks
 
diff --git a/proxy/mocks/client_creator.go b/proxy/mocks/client_creator.go
index 7c86a09c8..69f80af56 100644
--- a/proxy/mocks/client_creator.go
+++ b/proxy/mocks/client_creator.go
@@ -1,10 +1,10 @@
-// Code generated by mockery v1.1.1. DO NOT EDIT.
+// Code generated by mockery 2.7.4. DO NOT EDIT.
 
 package mocks
 
 import (
-	mock "github.com/stretchr/testify/mock"
 	abcicli "github.com/line/ostracon/abci/client"
+	mock "github.com/stretchr/testify/mock"
 )
 
 // ClientCreator is an autogenerated mock type for the ClientCreator type
diff --git a/rpc/openapi/openapi.yaml b/rpc/openapi/openapi.yaml
index 31cf047f6..3df5c5a65 100644
--- a/rpc/openapi/openapi.yaml
+++ b/rpc/openapi/openapi.yaml
@@ -1202,7 +1202,7 @@ components:
       properties:
         type:
           type: string
-          example: "tendermint/PubKeyEd25519"
+          example: "ostracon/PubKeyEd25519"
         value:
           type: string
           example: "A6DoBUypNtUAyEHWtQ9bFjfNg8Bo9CrnkUGl6k6OHN4="
@@ -1646,7 +1646,7 @@ components:
                     properties:
                       type:
                         type: string
-                        example: "tendermint/PubKeyEd25519"
+                        example: "ostracon/PubKeyEd25519"
                       value:
                         type: string
                         example: "9tK9IT+FPdf2qm+5c2qaxi10sWP+3erWTKgftn2PaQM="
@@ -1805,7 +1805,7 @@ components:
                         properties:
                           type:
                             type: string
-                            example: "tendermint/PubKeyEd25519"
+                            example: "ostracon/PubKeyEd25519"
                           value:
                             type: string
                             example: "cOQZvh/h9ZioSeUMZB/1Vy1Xo5x2sjrVjlE/qHnYifM="
@@ -2702,7 +2702,7 @@ components:
           properties:
             type:
               type: string
-              example: "tendermint/PubKeyEd25519"
+              example: "ostracon/PubKeyEd25519"
             value:
               type: string
               example: "9tK9IT+FPdf2qm+5c2qaxi10sWP+3erWTKgftn2PaQM="
diff --git a/state/execution.go b/state/execution.go
index fe03c891c..5d7b68744 100644
--- a/state/execution.go
+++ b/state/execution.go
@@ -258,8 +258,7 @@ func (blockExec *BlockExecutor) Commit(
 	// Update mempool.
 	updateMempoolStartTime := time.Now().UnixNano()
 	err = blockExec.mempool.Update(
-		block.Height,
-		block.Txs,
+		block,
 		deliverTxResponses,
 		TxPreCheck(state),
 		TxPostCheck(state),
@@ -383,7 +382,7 @@ func getBeginBlockValidatorInfo(block *types.Block, store Store,
 		for i, val := range lastValSet.Validators {
 			commitSig := block.LastCommit.Signatures[i]
 			voteInfos[i] = abci.VoteInfo{
-				Validator:       types.TM2PB.Validator(val),
+				Validator:       types.OST2PB.Validator(val),
 				SignedLastBlock: !commitSig.Absent(),
 			}
 		}
diff --git a/state/execution_test.go b/state/execution_test.go
index 6a148ea30..832c4e0ac 100644
--- a/state/execution_test.go
+++ b/state/execution_test.go
@@ -181,14 +181,14 @@ func TestBeginBlockByzantineValidators(t *testing.T) {
 			Type:             abci.EvidenceType_DUPLICATE_VOTE,
 			Height:           3,
 			Time:             defaultEvidenceTime,
-			Validator:        types.TM2PB.Validator(state.Validators.Validators[0]),
+			Validator:        types.OST2PB.Validator(state.Validators.Validators[0]),
 			TotalVotingPower: 10,
 		},
 		{
 			Type:             abci.EvidenceType_LIGHT_CLIENT_ATTACK,
 			Height:           8,
 			Time:             defaultEvidenceTime,
-			Validator:        types.TM2PB.Validator(state.Validators.Validators[0]),
+			Validator:        types.OST2PB.Validator(state.Validators.Validators[0]),
 			TotalVotingPower: 12,
 		},
 	}
diff --git a/state/helpers_test.go b/state/helpers_test.go
index de0673b48..e4dc554ec 100644
--- a/state/helpers_test.go
+++ b/state/helpers_test.go
@@ -166,8 +166,8 @@ func makeHeaderPartsResponsesValPubKeyChange(
 	if !bytes.Equal(pubkey.Bytes(), val.PubKey.Bytes()) {
 		abciResponses.EndBlock = &abci.ResponseEndBlock{
 			ValidatorUpdates: []abci.ValidatorUpdate{
-				types.TM2PB.NewValidatorUpdate(val.PubKey, 0),
-				types.TM2PB.NewValidatorUpdate(pubkey, 10),
+				types.OST2PB.NewValidatorUpdate(val.PubKey, 0),
+				types.OST2PB.NewValidatorUpdate(pubkey, 10),
 			},
 		}
 	}
@@ -191,7 +191,7 @@ func makeHeaderPartsResponsesValPowerChange(
 	if val.VotingPower != power {
 		abciResponses.EndBlock = &abci.ResponseEndBlock{
 			ValidatorUpdates: []abci.ValidatorUpdate{
-				types.TM2PB.NewValidatorUpdate(val.PubKey, power),
+				types.OST2PB.NewValidatorUpdate(val.PubKey, power),
 			},
 		}
 	}
@@ -207,7 +207,7 @@ func makeHeaderPartsResponsesParams(
 	block := makeBlock(state, state.LastBlockHeight+1)
 	abciResponses := &tmstate.ABCIResponses{
 		BeginBlock: &abci.ResponseBeginBlock{},
-		EndBlock:   &abci.ResponseEndBlock{ConsensusParamUpdates: types.TM2PB.ConsensusParams(&params)},
+		EndBlock:   &abci.ResponseEndBlock{ConsensusParamUpdates: types.OST2PB.ConsensusParams(&params)},
 	}
 	return block.Header, types.BlockID{Hash: block.Hash(), PartSetHeader: types.PartSetHeader{}}, abciResponses
 }
diff --git a/state/state_test.go b/state/state_test.go
index 6c42996c3..bcdb54f2e 100644
--- a/state/state_test.go
+++ b/state/state_test.go
@@ -111,7 +111,7 @@ func TestABCIResponsesSaveLoad1(t *testing.T) {
 	abciResponses.DeliverTxs[0] = &abci.ResponseDeliverTx{Data: []byte("foo"), Events: nil}
 	abciResponses.DeliverTxs[1] = &abci.ResponseDeliverTx{Data: []byte("bar"), Log: "ok", Events: nil}
 	abciResponses.EndBlock = &abci.ResponseEndBlock{ValidatorUpdates: []abci.ValidatorUpdate{
-		types.TM2PB.NewValidatorUpdate(ed25519.GenPrivKey().PubKey(), 10),
+		types.OST2PB.NewValidatorUpdate(ed25519.GenPrivKey().PubKey(), 10),
 	}}
 
 	err := stateStore.SaveABCIResponses(block.Height, abciResponses)
diff --git a/test/maverick/consensus/replay.go b/test/maverick/consensus/replay.go
index decac3712..2b857627a 100644
--- a/test/maverick/consensus/replay.go
+++ b/test/maverick/consensus/replay.go
@@ -307,8 +307,8 @@ func (h *Handshaker) ReplayBlocks(
 			validators[i] = types.NewValidator(val.PubKey, val.Power)
 		}
 		validatorSet := types.NewValidatorSet(validators)
-		nextVals := types.TM2PB.ValidatorUpdates(validatorSet)
-		csParams := types.TM2PB.ConsensusParams(h.genDoc.ConsensusParams)
+		nextVals := types.OST2PB.ValidatorUpdates(validatorSet)
+		csParams := types.OST2PB.ConsensusParams(h.genDoc.ConsensusParams)
 		req := abci.RequestInitChain{
 			Time:            h.genDoc.GenesisTime,
 			ChainId:         h.genDoc.ChainID,
diff --git a/test/maverick/consensus/replay_stubs.go b/test/maverick/consensus/replay_stubs.go
index 39c84b578..5c94c9fce 100644
--- a/test/maverick/consensus/replay_stubs.go
+++ b/test/maverick/consensus/replay_stubs.go
@@ -24,8 +24,7 @@ func (emptyMempool) CheckTx(_ types.Tx, _ func(*abci.Response), _ mempl.TxInfo)
 func (emptyMempool) ReapMaxBytesMaxGas(_, _ int64) types.Txs { return types.Txs{} }
 func (emptyMempool) ReapMaxTxs(n int) types.Txs              { return types.Txs{} }
 func (emptyMempool) Update(
-	_ int64,
-	_ types.Txs,
+	_ *types.Block,
 	_ []*abci.ResponseDeliverTx,
 	_ mempl.PreCheckFunc,
 	_ mempl.PostCheckFunc,
diff --git a/tools/tm-signer-harness/internal/test_harness_test.go b/tools/tm-signer-harness/internal/test_harness_test.go
index 05537e299..e037c61cc 100644
--- a/tools/tm-signer-harness/internal/test_harness_test.go
+++ b/tools/tm-signer-harness/internal/test_harness_test.go
@@ -21,11 +21,11 @@ const (
 	keyFileContents = `{
 	"address": "D08FCA3BA74CF17CBFC15E64F9505302BB0E2748",
 	"pub_key": {
-		"type": "tendermint/PubKeyEd25519",
+		"type": "ostracon/PubKeyEd25519",
 		"value": "ZCsuTjaczEyon70nmKxwvwu+jqrbq5OH3yQjcK0SFxc="
 		},
 	"priv_key": {
-		"type": "tendermint/PrivKeyEd25519",
+		"type": "ostracon/PrivKeyEd25519",
 		"value": "8O39AkQsoe1sBQwud/Kdul8lg8K9SFsql9aZvwXQSt1kKy5ONpzMTKifvSeYrHC/C76Oqturk4ffJCNwrRIXFw=="
 	}
 }`
@@ -60,7 +60,7 @@ const (
 		{
 		"address": "D08FCA3BA74CF17CBFC15E64F9505302BB0E2748",
 		"pub_key": {
-			"type": "tendermint/PubKeyEd25519",
+			"type": "ostracon/PubKeyEd25519",
 			"value": "ZCsuTjaczEyon70nmKxwvwu+jqrbq5OH3yQjcK0SFxc="
 		},
 		"power": "10",
diff --git a/types/evidence.go b/types/evidence.go
index 418427dc4..e5e814f3d 100644
--- a/types/evidence.go
+++ b/types/evidence.go
@@ -205,7 +205,7 @@ func (l *LightClientAttackEvidence) ABCI() []abci.Evidence {
 	for idx, val := range l.ByzantineValidators {
 		abciEv[idx] = abci.Evidence{
 			Type:             abci.EvidenceType_LIGHT_CLIENT_ATTACK,
-			Validator:        TM2PB.Validator(val),
+			Validator:        OST2PB.Validator(val),
 			Height:           l.Height(),
 			Time:             l.Timestamp,
 			TotalVotingPower: l.TotalVotingPower,
diff --git a/types/genesis_test.go b/types/genesis_test.go
index 042784a9b..cfec05940 100644
--- a/types/genesis_test.go
+++ b/types/genesis_test.go
@@ -29,7 +29,7 @@ func TestGenesisBad(t *testing.T) {
 		[]byte(
 			`{"validators":[` +
 				`{"pub_key":{` +
-				`"type":"tendermint/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="` +
+				`"type":"ostracon/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="` +
 				`},"power":"10","name":""}` +
 				`]}`,
 		),
@@ -37,7 +37,7 @@ func TestGenesisBad(t *testing.T) {
 		[]byte(
 			`{"chain_id": "Lorem ipsum dolor sit amet, consectetuer adipiscing", "validators": [` +
 				`{"pub_key":{` +
-				`"type":"tendermint/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="` +
+				`"type":"ostracon/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="` +
 				`},"power":"10","name":""}` +
 				`]}`,
 		),
@@ -45,7 +45,7 @@ func TestGenesisBad(t *testing.T) {
 		[]byte(
 			`{"chain_id":"mychain", "validators":[` +
 				`{"address": "A", "pub_key":{` +
-				`"type":"tendermint/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="` +
+				`"type":"ostracon/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="` +
 				`},"power":"10","name":""}` +
 				`]}`,
 		),
@@ -66,7 +66,7 @@ func TestGenesisGood(t *testing.T) {
 			"initial_height": "1000",
 			"consensus_params": null,
 			"validators": [{
-				"pub_key":{"type":"tendermint/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="},
+				"pub_key":{"type":"ostracon/PubKeyEd25519","value":"AT/+aaL1eB0477Mud9JMm8Sh8BIvOYlPGC9KkIUmFaE="},
 				"power":"10",
 				"name":""
 			}],
diff --git a/types/protobuf.go b/types/protobuf.go
index aee652f74..c158ce044 100644
--- a/types/protobuf.go
+++ b/types/protobuf.go
@@ -26,13 +26,13 @@ var ABCIPubKeyTypesToNames = map[string]string{
 
 //-------------------------------------------------------
 
-// TM2PB is used for converting Tendermint ABCI to protobuf ABCI.
+// OST2PB is used for converting Ostracon ABCI to protobuf ABCI.
 // UNSTABLE
-var TM2PB = tm2pb{}
+var OST2PB = ost2pb{}
 
-type tm2pb struct{}
+type ost2pb struct{}
 
-func (tm2pb) Header(header *Header) tmproto.Header {
+func (ost2pb) Header(header *Header) tmproto.Header {
 	return tmproto.Header{
 		Version: header.Version,
 		ChainID: header.ChainID,
@@ -55,21 +55,21 @@ func (tm2pb) Header(header *Header) tmproto.Header {
 	}
 }
 
-func (tm2pb) Validator(val *Validator) abci.Validator {
+func (ost2pb) Validator(val *Validator) abci.Validator {
 	return abci.Validator{
 		Address: val.PubKey.Address(),
 		Power:   val.VotingPower,
 	}
 }
 
-func (tm2pb) BlockID(blockID BlockID) tmproto.BlockID {
+func (ost2pb) BlockID(blockID BlockID) tmproto.BlockID {
 	return tmproto.BlockID{
 		Hash:          blockID.Hash,
-		PartSetHeader: TM2PB.PartSetHeader(blockID.PartSetHeader),
+		PartSetHeader: OST2PB.PartSetHeader(blockID.PartSetHeader),
 	}
 }
 
-func (tm2pb) PartSetHeader(header PartSetHeader) tmproto.PartSetHeader {
+func (ost2pb) PartSetHeader(header PartSetHeader) tmproto.PartSetHeader {
 	return tmproto.PartSetHeader{
 		Total: header.Total,
 		Hash:  header.Hash,
@@ -77,7 +77,7 @@ func (tm2pb) PartSetHeader(header PartSetHeader) tmproto.PartSetHeader {
 }
 
 // XXX: panics on unknown pubkey type
-func (tm2pb) ValidatorUpdate(val *Validator) abci.ValidatorUpdate {
+func (ost2pb) ValidatorUpdate(val *Validator) abci.ValidatorUpdate {
 	pk, err := cryptoenc.PubKeyToProto(val.PubKey)
 	if err != nil {
 		panic(err)
@@ -89,15 +89,15 @@ func (tm2pb) ValidatorUpdate(val *Validator) abci.ValidatorUpdate {
 }
 
 // XXX: panics on nil or unknown pubkey type
-func (tm2pb) ValidatorUpdates(vals *ValidatorSet) []abci.ValidatorUpdate {
+func (ost2pb) ValidatorUpdates(vals *ValidatorSet) []abci.ValidatorUpdate {
 	validators := make([]abci.ValidatorUpdate, vals.Size())
 	for i, val := range vals.Validators {
-		validators[i] = TM2PB.ValidatorUpdate(val)
+		validators[i] = OST2PB.ValidatorUpdate(val)
 	}
 	return validators
 }
 
-func (tm2pb) ConsensusParams(params *tmproto.ConsensusParams) *abci.ConsensusParams {
+func (ost2pb) ConsensusParams(params *tmproto.ConsensusParams) *abci.ConsensusParams {
 	return &abci.ConsensusParams{
 		Block: &abci.BlockParams{
 			MaxBytes: params.Block.MaxBytes,
@@ -109,7 +109,7 @@ func (tm2pb) ConsensusParams(params *tmproto.ConsensusParams) *abci.ConsensusPar
 }
 
 // XXX: panics on nil or unknown pubkey type
-func (tm2pb) NewValidatorUpdate(pubkey crypto.PubKey, power int64) abci.ValidatorUpdate {
+func (ost2pb) NewValidatorUpdate(pubkey crypto.PubKey, power int64) abci.ValidatorUpdate {
 	pubkeyABCI, err := cryptoenc.PubKeyToProto(pubkey)
 	if err != nil {
 		panic(err)
diff --git a/types/protobuf_test.go b/types/protobuf_test.go
index f3986af4c..3a38990bb 100644
--- a/types/protobuf_test.go
+++ b/types/protobuf_test.go
@@ -35,18 +35,18 @@ func TestABCIValidators(t *testing.T) {
 
 	tmVal := NewValidator(pkEd, 10)
 
-	abciVal := TM2PB.ValidatorUpdate(tmVal)
+	abciVal := OST2PB.ValidatorUpdate(tmVal)
 	tmVals, err := PB2TM.ValidatorUpdates([]abci.ValidatorUpdate{abciVal})
 	assert.Nil(t, err)
 	assert.Equal(t, tmValExpected, tmVals[0])
 
-	abciVals := TM2PB.ValidatorUpdates(NewValidatorSet(tmVals))
+	abciVals := OST2PB.ValidatorUpdates(NewValidatorSet(tmVals))
 	assert.Equal(t, []abci.ValidatorUpdate{abciVal}, abciVals)
 
 	// val with address
 	tmVal.Address = pkEd.Address()
 
-	abciVal = TM2PB.ValidatorUpdate(tmVal)
+	abciVal = OST2PB.ValidatorUpdate(tmVal)
 	tmVals, err = PB2TM.ValidatorUpdates([]abci.ValidatorUpdate{abciVal})
 	assert.Nil(t, err)
 	assert.Equal(t, tmValExpected, tmVals[0])
@@ -54,7 +54,7 @@ func TestABCIValidators(t *testing.T) {
 
 func TestABCIConsensusParams(t *testing.T) {
 	cp := DefaultConsensusParams()
-	abciCP := TM2PB.ConsensusParams(cp)
+	abciCP := OST2PB.ConsensusParams(cp)
 	cp2 := UpdateConsensusParams(*cp, abciCP)
 
 	assert.Equal(t, *cp, cp2)
@@ -72,17 +72,17 @@ func (pubKeyEddie) Type() string                                { return "pubKey
 func TestABCIValidatorFromPubKeyAndPower(t *testing.T) {
 	pubkey := ed25519.GenPrivKey().PubKey()
 
-	abciVal := TM2PB.NewValidatorUpdate(pubkey, 10)
+	abciVal := OST2PB.NewValidatorUpdate(pubkey, 10)
 	assert.Equal(t, int64(10), abciVal.Power)
 
-	assert.Panics(t, func() { TM2PB.NewValidatorUpdate(nil, 10) })
-	assert.Panics(t, func() { TM2PB.NewValidatorUpdate(pubKeyEddie{}, 10) })
+	assert.Panics(t, func() { OST2PB.NewValidatorUpdate(nil, 10) })
+	assert.Panics(t, func() { OST2PB.NewValidatorUpdate(pubKeyEddie{}, 10) })
 }
 
 func TestABCIValidatorWithoutPubKey(t *testing.T) {
 	pkEd := ed25519.GenPrivKey().PubKey()
 
-	abciVal := TM2PB.Validator(NewValidator(pkEd, 10))
+	abciVal := OST2PB.Validator(NewValidator(pkEd, 10))
 
 	// pubkey must be nil
 	tmValExpected := abci.Validator{