[DO NOT MERGE] just for perf testing

abci/client/grpc_client.go

@@ -130,8 +130,9 @@ func (cli *grpcClient) Info(ctx context.Context, params *types.RequestInfo) (*ty
 	return cli.client.Info(ctx, types.ToRequestInfo(params).GetInfo(), grpc.WaitForReady(true))
 }
 
-func (cli *grpcClient) CheckTx(ctx context.Context, params *types.RequestCheckTx) (*types.ResponseCheckTx, error) {
-	return cli.client.CheckTx(ctx, types.ToRequestCheckTx(params).GetCheckTx(), grpc.WaitForReady(true))
+func (cli *grpcClient) CheckTx(ctx context.Context, params *types.RequestCheckTx) (*types.ResponseCheckTxV2, error) {
+	resCheckTx, err := cli.client.CheckTx(ctx, types.ToRequestCheckTx(params).GetCheckTx(), grpc.WaitForReady(true))
+	return &types.ResponseCheckTxV2{ResponseCheckTx: resCheckTx}, err
 }
 
 func (cli *grpcClient) Query(ctx context.Context, params *types.RequestQuery) (*types.ResponseQuery, error) {

abci/client/socket_client.go

@@ -257,12 +257,12 @@ func (cli *socketClient) Info(ctx context.Context, req *types.RequestInfo) (*typ
 	return res.GetInfo(), nil
 }
 
-func (cli *socketClient) CheckTx(ctx context.Context, req *types.RequestCheckTx) (*types.ResponseCheckTx, error) {
+func (cli *socketClient) CheckTx(ctx context.Context, req *types.RequestCheckTx) (*types.ResponseCheckTxV2, error) {
 	res, err := cli.doRequest(ctx, types.ToRequestCheckTx(req))
 	if err != nil {
 		return nil, err
 	}
-	return res.GetCheckTx(), nil
+	return &types.ResponseCheckTxV2{ResponseCheckTx: res.GetCheckTx()}, nil
 }
 
 func (cli *socketClient) Query(ctx context.Context, req *types.RequestQuery) (*types.ResponseQuery, error) {

abci/example/kvstore/kvstore.go

@@ -205,8 +205,8 @@ func (app *Application) FinalizeBlock(_ context.Context, req *types.RequestFinal
 	return &types.ResponseFinalizeBlock{TxResults: respTxs, ValidatorUpdates: app.ValUpdates, AppHash: appHash}, nil
 }
 
-func (*Application) CheckTx(_ context.Context, req *types.RequestCheckTx) (*types.ResponseCheckTx, error) {
-	return &types.ResponseCheckTx{Code: code.CodeTypeOK, GasWanted: 1}, nil
+func (*Application) CheckTx(_ context.Context, req *types.RequestCheckTx) (*types.ResponseCheckTxV2, error) {
+	return &types.ResponseCheckTxV2{ResponseCheckTx: &types.ResponseCheckTx{Code: code.CodeTypeOK, GasWanted: 1}}, nil
 }
 
 func (app *Application) Commit(_ context.Context) (*types.ResponseCommit, error) {

abci/server/grpc_server.go

@@ -81,3 +81,11 @@ func (app *gRPCApplication) Flush(_ context.Context, req *types.RequestFlush) (*
 func (app *gRPCApplication) Commit(ctx context.Context, req *types.RequestCommit) (*types.ResponseCommit, error) {
 	return app.Application.Commit(ctx)
 }
+
+func (app *gRPCApplication) CheckTx(ctx context.Context, req *types.RequestCheckTx) (*types.ResponseCheckTx, error) {
+	resV2, err := app.Application.CheckTx(ctx, req)
+	if err != nil {
+		return &types.ResponseCheckTx{}, err
+	}
+	return resV2.ResponseCheckTx, nil
+}

abci/types/application.go

@@ -12,7 +12,7 @@ type Application interface {
 	Query(context.Context, *RequestQuery) (*ResponseQuery, error) // Query for state
 
 	// Mempool Connection
-	CheckTx(context.Context, *RequestCheckTx) (*ResponseCheckTx, error) // Validate a tx for the mempool
+	CheckTx(context.Context, *RequestCheckTx) (*ResponseCheckTxV2, error) // Validate a tx for the mempool
 
 	// Consensus Connection
 	InitChain(context.Context, *RequestInitChain) (*ResponseInitChain, error) // Initialize blockchain w validators/other info from TendermintCore
@@ -51,8 +51,8 @@ func (BaseApplication) Info(_ context.Context, req *RequestInfo) (*ResponseInfo,
 	return &ResponseInfo{}, nil
 }
 
-func (BaseApplication) CheckTx(_ context.Context, req *RequestCheckTx) (*ResponseCheckTx, error) {
-	return &ResponseCheckTx{Code: CodeTypeOK}, nil
+func (BaseApplication) CheckTx(_ context.Context, req *RequestCheckTx) (*ResponseCheckTxV2, error) {
+	return &ResponseCheckTxV2{ResponseCheckTx: &ResponseCheckTx{Code: CodeTypeOK}}, nil
 }
 
 func (BaseApplication) Commit(_ context.Context) (*ResponseCommit, error) {

abci/types/messages.go

@@ -155,9 +155,9 @@ func ToResponseInfo(res *ResponseInfo) *Response {
 	}
 }
 
-func ToResponseCheckTx(res *ResponseCheckTx) *Response {
+func ToResponseCheckTx(res *ResponseCheckTxV2) *Response {
 	return &Response{
-		Value: &Response_CheckTx{res},
+		Value: &Response_CheckTx{res.ResponseCheckTx},
 	}
 }
 

abci/types/types.go

@@ -237,3 +237,28 @@ func MarshalTxResults(r []*ExecTxResult) ([][]byte, error) {
 	}
 	return s, nil
 }
+
+type PendingTxCheckerResponse int
+
+const (
+	Accepted PendingTxCheckerResponse = iota
+	Rejected
+	Pending
+)
+
+type PendingTxChecker func() PendingTxCheckerResponse
+type ExpireTxHandler func()
+
+// ResponseCheckTxV2 response type contains non-protobuf fields, so non-local ABCI clients will not be able
+// to utilize the new fields in V2 type (but still be backwards-compatible)
+type ResponseCheckTxV2 struct {
+	*ResponseCheckTx
+	IsPendingTransaction bool
+	Checker              PendingTxChecker // must not be nil if IsPendingTransaction is true
+	ExpireTxHandler      ExpireTxHandler
+
+	// helper properties for prioritization in mempool
+	EVMNonce         uint64
+	EVMSenderAddress string
+	IsEVM            bool
+}