From 5883c0e942071b072073420caff1903d6e307649 Mon Sep 17 00:00:00 2001
From: Jae Kwon <jae@tendermint.com>
Date: Thu, 12 Apr 2018 15:56:41 -0700
Subject: [PATCH] Support namespacing within RMS db

---
 store/rootmultistore.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/store/rootmultistore.go b/store/rootmultistore.go
index 9be28967c..6ee800db4 100644
--- a/store/rootmultistore.go
+++ b/store/rootmultistore.go
@@ -56,8 +56,9 @@ func (rs *rootMultiStore) MountStoreWithDB(key StoreKey, typ StoreType, db dbm.D
 		panic(fmt.Sprintf("rootMultiStore duplicate store key %v", key))
 	}
 	rs.storesParams[key] = storeParams{
-		db:  db,
+		key: key,
 		typ: typ,
+		db:  db,
 	}
 	rs.keysByName[key.Name()] = key
 }
@@ -244,9 +245,12 @@ func parsePath(path string) (storeName string, subpath string, err sdk.Error) {
 //----------------------------------------
 
 func (rs *rootMultiStore) loadCommitStoreFromParams(id CommitID, params storeParams) (store CommitStore, err error) {
-	db := rs.db
+	var db dbm.DB
 	if params.db != nil {
 		db = params.db
+	} else {
+		db = rs.db
+		db = dbm.NewPrefixDB(rs.db, []byte(params.key.Name()))
 	}
 	switch params.typ {
 	case sdk.StoreTypeMulti:
@@ -276,6 +280,7 @@ func (rs *rootMultiStore) nameToKey(name string) StoreKey {
 // storeParams
 
 type storeParams struct {
+	key StoreKey
 	db  dbm.DB
 	typ StoreType
 }