feat(vstorage): backport SetStorageAndNotify

golang/cosmos/types/events.go

@@ -0,0 +1,25 @@
+package types
+
+import (
+	"encoding/base64"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+const (
+	EventTypeStateChange = "state_change"
+
+	AttributeKeyStoreName     = "store_name"
+	AttributeKeyStoreSubkey   = "store_subkey"
+	AttributeKeyUnprovedValue = "unproved_value"
+)
+
+func NewStateChangeEvent(storeName string, subkey, value []byte) sdk.Event {
+	// Bytes are base64-encoded.
+	return sdk.NewEvent(
+		EventTypeStateChange,
+		sdk.NewAttribute(AttributeKeyStoreName, storeName),
+		sdk.NewAttribute(AttributeKeyStoreSubkey, base64.StdEncoding.EncodeToString(subkey)),
+		sdk.NewAttribute(AttributeKeyUnprovedValue, base64.StdEncoding.EncodeToString(value)),
+	)
+}

golang/cosmos/x/vstorage/keeper/keeper.go

@@ -5,9 +5,10 @@ import (
 	"strings"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	db "github.com/tendermint/tm-db"
 
+	agoric "github.com/Agoric/agoric-sdk/golang/cosmos/types"
 	"github.com/Agoric/agoric-sdk/golang/cosmos/x/vstorage/types"
-	db "github.com/tendermint/tm-db"
 )
 
 // Keeper maintains the link to data storage and exposes getter/setter methods
@@ -171,3 +172,11 @@ func (k Keeper) SetStorage(ctx sdk.Context, path, value string) {
 		}
 	}
 }
+
+func (k Keeper) PathToEncodedKey(path string) []byte {
+	return types.PathToEncodedKey(path)
+}
+
+func (k Keeper) GetStoreName() string {
+	return k.storeKey.Name()
+}