Initialize the new app with a deep SMT instead of populating the empty SMT

[Manav-Aggarwal]

Currently, when a new baseapp is set from the contents of a fraudproof, when setting key/value pairs in the store of the baseapp, we start with an empty SMT with no predefined root. However, we must start with a deep SMT with a predefined root taken from the given fraudproof. This lets the new app's substore hashes to be the same.

Right now, since we load the key/value pairs on an empty SMT we don't get the same root as the pre-state root of a challenged transaction.

Starting point:

cosmos-sdk/baseapp/baseapp.go

Line 873 in aa56ce4

func SetupBaseAppFromParams(appName string, logger log.Logger, db dbm.Connection, txDecoder sdk.TxDecoder, storeKeyNames []string, blockHeight int64, storeToLoadFrom map[string]types.KVStore, options ...AppOption) (*BaseApp, error) {

[Manav-Aggarwal]

We use IAVL store type now. Closed by: rollkit#2