statesync: assert app version matches (backport #7856) (#7885)

test/e2e/app/app.go

@@ -15,9 +15,12 @@ import (
 	"github.com/tendermint/tendermint/version"
 )
 
+const appVersion = 1
+
 // Application is an ABCI application for use by end-to-end tests. It is a
 // simple key/value store for strings, storing data in memory and persisting
 // to disk as JSON, taking state sync snapshots if requested.
+
 type Application struct {
 	abci.BaseApplication
 	logger          log.Logger
@@ -99,7 +102,7 @@ func NewApplication(cfg *Config) (*Application, error) {
 func (app *Application) Info(req abci.RequestInfo) abci.ResponseInfo {
 	return abci.ResponseInfo{
 		Version:          version.ABCIVersion,
-		AppVersion:       1,
+		AppVersion:       appVersion,
 		LastBlockHeight:  int64(app.state.Height),
 		LastBlockAppHash: app.state.Hash,
 	}

test/e2e/runner/setup.go

@@ -202,6 +202,8 @@ func MakeGenesis(testnet *e2e.Testnet) (types.GenesisDoc, error) {
 		ConsensusParams: types.DefaultConsensusParams(),
 		InitialHeight:   testnet.InitialHeight,
 	}
+	// set the app version to 1
+	genesis.ConsensusParams.Version.AppVersion = 1
 	for validator, power := range testnet.Validators {
 		genesis.Validators = append(genesis.Validators, types.GenesisValidator{
 			Name:    validator.Name,