diff --git a/Gopkg.lock b/Gopkg.lock
index e1fc6f3b..e31f752f 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -7,6 +7,16 @@
   packages = ["btcec"]
   revision = "86fed781132ac890ee03e906e4ecd5d6fa180c64"
 
+[[projects]]
+  name = "github.com/cosmos/cosmos-sdk"
+  packages = [
+    "store",
+    "types",
+    "wire"
+  ]
+  revision = "cf46be225b7f3853e36af0feac04e29188cd4c95"
+  version = "v0.17.5"
+
 [[projects]]
   name = "github.com/davecgh/go-spew"
   packages = ["spew"]
@@ -60,12 +70,27 @@
   name = "github.com/gogo/protobuf"
   packages = [
     "gogoproto",
+    "jsonpb",
     "proto",
-    "protoc-gen-gogo/descriptor"
+    "protoc-gen-gogo/descriptor",
+    "sortkeys",
+    "types"
   ]
   revision = "1adfc126b41513cc696b209667c8656ea7aac67c"
   version = "v1.0.0"
 
+[[projects]]
+  name = "github.com/golang/protobuf"
+  packages = [
+    "proto",
+    "ptypes",
+    "ptypes/any",
+    "ptypes/duration",
+    "ptypes/timestamp"
+  ]
+  revision = "925541529c1fa6821df4e44ce2723319eb2be768"
+  version = "v1.0.0"
+
 [[projects]]
   branch = "master"
   name = "github.com/golang/snappy"
@@ -118,11 +143,33 @@
   ]
   revision = "e2150783cd35f5b607daca48afd8c57ec54cc995"
 
+[[projects]]
+  name = "github.com/tendermint/abci"
+  packages = ["types"]
+  revision = "78a8905690ef54f9d57e3b2b0ee7ad3a04ef3f1f"
+  version = "v0.10.3"
+
+[[projects]]
+  branch = "master"
+  name = "github.com/tendermint/ed25519"
+  packages = [
+    ".",
+    "edwards25519",
+    "extra25519"
+  ]
+  revision = "d8387025d2b9d158cf4efb07e7ebf814bcce2057"
+
 [[projects]]
   name = "github.com/tendermint/go-amino"
   packages = ["."]
-  revision = "3c22a7a539411f89a96738fcfa14c1027e24e5ec"
-  version = "0.9.10"
+  revision = "ed62928576cfcaf887209dc96142cd79cdfff389"
+  version = "0.9.9"
+
+[[projects]]
+  name = "github.com/tendermint/go-crypto"
+  packages = ["."]
+  revision = "915416979bf70efa4bcbf1c6cd5d64c5fff9fc19"
+  version = "v0.6.2"
 
 [[projects]]
   name = "github.com/tendermint/iavl"
@@ -138,11 +185,89 @@
   packages = [
     "common",
     "db",
-    "log"
+    "log",
+    "merkle"
   ]
   revision = "692f1d86a6e2c0efa698fd1e4541b68c74ffaf38"
   version = "v0.8.4"
 
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/crypto"
+  packages = [
+    "nacl/secretbox",
+    "openpgp/armor",
+    "openpgp/errors",
+    "poly1305",
+    "ripemd160",
+    "salsa20/salsa"
+  ]
+  revision = "8ac0e0d97ce45cd83d1d7243c060cb8461dda5e9"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/net"
+  packages = [
+    "context",
+    "http/httpguts",
+    "http2",
+    "http2/hpack",
+    "idna",
+    "internal/timeseries",
+    "trace"
+  ]
+  revision = "db08ff08e8622530d9ed3a0e8ac279f6d4c02196"
+
+[[projects]]
+  name = "golang.org/x/text"
+  packages = [
+    "collate",
+    "collate/build",
+    "internal/colltab",
+    "internal/gen",
+    "internal/tag",
+    "internal/triegen",
+    "internal/ucd",
+    "language",
+    "secure/bidirule",
+    "transform",
+    "unicode/bidi",
+    "unicode/cldr",
+    "unicode/norm",
+    "unicode/rangetable"
+  ]
+  revision = "f21a4dfb5e38f5895301dc265a8def02365cc3d0"
+  version = "v0.3.0"
+
+[[projects]]
+  name = "google.golang.org/genproto"
+  packages = ["googleapis/rpc/status"]
+  revision = "7fd901a49ba6a7f87732eb344f6e3c5b19d1b200"
+
+[[projects]]
+  name = "google.golang.org/grpc"
+  packages = [
+    ".",
+    "balancer",
+    "codes",
+    "connectivity",
+    "credentials",
+    "grpclb/grpc_lb_v1/messages",
+    "grpclog",
+    "internal",
+    "keepalive",
+    "metadata",
+    "naming",
+    "peer",
+    "resolver",
+    "stats",
+    "status",
+    "tap",
+    "transport"
+  ]
+  revision = "5b3c4e850e90a4cf6a20ebd46c8b32a0a3afcb9e"
+  version = "v1.7.5"
+
 [[projects]]
   branch = "v2"
   name = "gopkg.in/karalabe/cookiejar.v2"
@@ -152,6 +277,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "e53d8700b947bc1e65c0d9def7f322670a1163625680b49568ac801a54fe2158"
+  inputs-digest = "405903b5cdec5fe831757bd4289ad96436109112bb3ef41be36992969312e8f1"
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
index 6f5bedec..ce7e025b 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -24,9 +24,18 @@
 #   go-tests = true
 #   unused-packages = true
 
-[[constraint]]
+[[override]]
   name = "github.com/tendermint/iavl"
   version = "0.8.0-rc0"
 
+[[override]]
+  name = "google.golang.org/genproto"
+  revision = "7fd901a49ba6a7f87732eb344f6e3c5b19d1b200"
+
+#[[constraint]]
+#  name = "github.com/cosmos/cosmos-sdk"
+#  version = "0.18.0"
+
+
 [prune]
   go-tests = true
diff --git a/main.go b/main.go
index 5db25a35..9e499ab1 100644
--- a/main.go
+++ b/main.go
@@ -9,18 +9,20 @@ import (
 	eth_trie "github.com/ethereum/go-ethereum/trie"
 
 	dbm "github.com/tendermint/tmlibs/db"
-	"github.com/tendermint/iavl"
+	"github.com/cosmos/cosmos-sdk/store"
 )
 
 // Implementation of eth_state.Database
 type OurDatabase struct {
-	tree *iavl.Tree
+	st store.CommitStore
 }
 
-func OurNewDatabase(db dbm.DB, cacheSize int) *OurDatabase {
-	od := &OurDatabase{}
-	od.tree = iavl.NewTree(db, cacheSize)
-	return od
+func OurNewDatabase(db dbm.DB, id store.CommitID) (od *OurDatabase, err error) {
+	od = &OurDatabase{}
+	if od.st, err = store.LoadIAVLStore(db, id); err != nil {
+		return nil, err
+	}
+	return
 }
 
 func (od *OurDatabase) OpenTrie(root eth_common.Hash) (eth_state.Trie, error) {
@@ -87,6 +89,9 @@ func main() {
 	fmt.Printf("Instantiating state.Database\n")
 	db := dbm.NewDB("test" /* name */, dbm.MemDBBackend, "" /* dir */)
 	var d eth_state.Database
-	d = OurNewDatabase(db, 1024)
+	var err error
+	if d, err = OurNewDatabase(db, store.CommitID{}); err != nil {
+		panic(err)
+	}
 	d.OpenTrie(eth_common.Hash{})
 }
\ No newline at end of file