chore: bump up tm-db and remove Domain() call (#118)

* chore: bump up tm-db and remove Domain() call

* chore: use linemint, line/tm-db

go.mod

@@ -25,9 +25,9 @@ require (
 	github.com/grpc-ecosystem/go-grpc-middleware v1.2.2
 	github.com/grpc-ecosystem/grpc-gateway v1.16.0
 	github.com/hashicorp/golang-lru v0.5.4
-	github.com/line/iavl/v2 v2.0.0-init.1.0.20210325055816-6304f1fd2f09
-	github.com/line/ostracon v0.34.9-0.20210325081149-c7c246b1be58
-	github.com/line/tm-db/v2 v2.0.0-init.1.0.20210325025547-0ea105c02281
+	github.com/line/iavl/v2 v2.0.0-init.1.0.20210406065347-cfd73e5acce0
+	github.com/line/ostracon v0.34.9-0.20210406083837-4183d649b30c
+	github.com/line/tm-db/v2 v2.0.0-init.1.0.20210406062110-9424ca70955a
 	github.com/magiconair/properties v1.8.4
 	github.com/mattn/go-isatty v0.0.12
 	github.com/otiai10/copy v1.4.2
@@ -60,7 +60,7 @@ replace (
 	github.com/CosmWasm/wasmvm => github.com/line/wasmvm v0.12.0-0.1.0
 	github.com/cosmos/cosmos-sdk => github.com/line/lbm-sdk v0.39.2-0.2.0
 	github.com/gogo/protobuf => github.com/regen-network/protobuf v1.3.3-alpha.regen.1
-	github.com/tendermint/tendermint => github.com/tendermint/tendermint v0.33.9
-	github.com/tendermint/tm-db => github.com/tendermint/tm-db v0.5.2
+	github.com/tendermint/tendermint => github.com/line/linemint v1.0.0
+	github.com/tendermint/tm-db => github.com/line/tm-db v0.5.2
 	google.golang.org/grpc => google.golang.org/grpc v1.33.2
 )

go.sum

@@ -104,7 +104,6 @@ github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfc
 github.com/cosmos/go-bip39 v0.0.0-20180819234021-555e2067c45d/go.mod h1:tSxLoYXyBmiFeKpvmq4dzayMdCjCnu8uqmCysIGBT2Y=
 github.com/cosmos/go-bip39 v1.0.0 h1:pcomnQdrdH22njcAatO0yWojsUnCO3y2tNoV1cb6hHY=
 github.com/cosmos/go-bip39 v1.0.0/go.mod h1:RNJv0H/pOIVgxw6KS7QeX2a0Uo0aKUlfhZ4xuwvCdJw=
-github.com/cosmos/iavl v0.15.3 h1:xE9r6HW8GeKeoYJN4zefpljZ1oukVScP/7M8oj6SUts=
 github.com/cosmos/iavl v0.15.3/go.mod h1:OLjQiAQ4fGD2KDZooyJG9yz+p2ao2IAYSbke8mVvSA4=
 github.com/cosmos/ledger-cosmos-go v0.11.1 h1:9JIYsGnXP613pb2vPjFeMMjBI5lEDsEaF6oYorTy6J4=
 github.com/cosmos/ledger-cosmos-go v0.11.1/go.mod h1:J8//BsAGTo3OC/vDLjMRFLW6q0WAaXvHnVc7ZmE8iUY=
@@ -145,10 +144,14 @@ github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1m
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/facebookgo/ensure v0.0.0-20160127193407-b4ab57deab51 h1:0JZ+dUmQeA8IIVUMzysrX4/AKuQwWhV2dYQuPZdvdSQ=
 github.com/facebookgo/ensure v0.0.0-20160127193407-b4ab57deab51/go.mod h1:Yg+htXGokKKdzcwhuNDwVvN+uBxDGXJ7G/VN1d8fa64=
+github.com/facebookgo/ensure v0.0.0-20200202191622-63f1cf65ac4c h1:8ISkoahWXwZR41ois5lSJBSVw4D0OV19Ht/JSTzvSv0=
+github.com/facebookgo/ensure v0.0.0-20200202191622-63f1cf65ac4c/go.mod h1:Yg+htXGokKKdzcwhuNDwVvN+uBxDGXJ7G/VN1d8fa64=
 github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 h1:JWuenKqqX8nojtoVVWjGfOF9635RETekkoH6Cc9SX0A=
 github.com/facebookgo/stack v0.0.0-20160209184415-751773369052/go.mod h1:UbMTZqLaRiH3MsBH8va0n7s1pQYcu3uTb8G4tygF4Zg=
 github.com/facebookgo/subset v0.0.0-20150612182917-8dac2c3c4870 h1:E2s37DuLxFhQDg5gKsWoLBOB0n+ZW8s599zru8FJ2/Y=
 github.com/facebookgo/subset v0.0.0-20150612182917-8dac2c3c4870/go.mod h1:5tD+neXqOorC30/tWg0LCSkrqj/AR6gu8yY8/fpw1q0=
+github.com/facebookgo/subset v0.0.0-20200203212716-c811ad88dec4 h1:7HZCaLC5+BZpmbhCOZJ293Lz68O7PYrF2EzeiFMwCLk=
+github.com/facebookgo/subset v0.0.0-20200203212716-c811ad88dec4/go.mod h1:5tD+neXqOorC30/tWg0LCSkrqj/AR6gu8yY8/fpw1q0=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/felixge/httpsnoop v1.0.1 h1:lvB5Jl89CsZtGIWuTcDM1E/vkVs49/Ml7JJe07l8SPQ=
 github.com/felixge/httpsnoop v1.0.1/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
@@ -332,15 +335,21 @@ github.com/libp2p/go-buffer-pool v0.0.2 h1:QNK2iAFa8gjAe1SPz6mHSMuCcjs+X1wlHzeOS
 github.com/libp2p/go-buffer-pool v0.0.2/go.mod h1:MvaB6xw5vOrDl8rYZGLFdKAuk/hRoRZd1Vi32+RXyFM=
 github.com/lightstep/lightstep-tracer-common/golang/gogo v0.0.0-20190605223551-bc2310a04743/go.mod h1:qklhhLq1aX+mtWk9cPHPzaBjWImj5ULL6C7HFJtXQMM=
 github.com/lightstep/lightstep-tracer-go v0.18.1/go.mod h1:jlF1pusYV4pidLvZ+XD0UBX0ZE6WURAspgAczcDHrL4=
-github.com/line/iavl/v2 v2.0.0-init.1.0.20210325055816-6304f1fd2f09 h1:11L4wU4iYYRfOP20qo7909Q0gkd1NG8GOjSPu3Bblcg=
-github.com/line/iavl/v2 v2.0.0-init.1.0.20210325055816-6304f1fd2f09/go.mod h1:lOUXCMWnB9G5wDfungP5nhnHAFgVBwB0/iqFhH44OIs=
+github.com/line/gorocksdb v0.0.0-20210406043732-d4bea34b6d55 h1:cXVtMiJkvQ4kn0pxM2svH1ncJbFgQsLHtnFC9qJj2VM=
+github.com/line/gorocksdb v0.0.0-20210406043732-d4bea34b6d55/go.mod h1:DHRJroSL7NaRkpvocRx3OtRsleXVsYSxBI9SfHFlTQ0=
+github.com/line/iavl/v2 v2.0.0-init.1.0.20210406065347-cfd73e5acce0 h1:Pcp/mxkvFmasaiPi9DS2ZXCKOalfDGtBKYjdswmF0nI=
+github.com/line/iavl/v2 v2.0.0-init.1.0.20210406065347-cfd73e5acce0/go.mod h1:Z2UTxsbKefd7bnEywGNxxmVYYGy9Ecd4nd1IZyR0bQM=
 github.com/line/lbm-sdk v0.39.2-0.2.0 h1:tlQHZcf+AXejSBAhYgO5Tn1NaoCF0XRNf/6c0jeo3HE=
 github.com/line/lbm-sdk v0.39.2-0.2.0/go.mod h1:UTxdYWx+OeRezEP8P5BxipddlFpq4q92uYydSeYN7B0=
+github.com/line/linemint v1.0.0 h1:sTrDaGP67/5Klxtsuid8wOkQ2y43Y5QkmD8cDMmDeaA=
+github.com/line/linemint v1.0.0/go.mod h1:0yUs9eIuuDq07nQql9BmI30FtYGcEC60Tu5JzB5IezM=
 github.com/line/ostracon v0.34.9-0.20210315041958-2a1f43c788f5/go.mod h1:1THU+kF+6fxLaNYQKcdNyLCO6t9LnqSMaExDMiLozbM=
-github.com/line/ostracon v0.34.9-0.20210325081149-c7c246b1be58 h1:k+/hsrZ1RFIlL9+PRDzKPY+5YKFDWklReIgbeYmt+c4=
-github.com/line/ostracon v0.34.9-0.20210325081149-c7c246b1be58/go.mod h1:JQ5id/iSwal6/BAoN119QEzfTKm90DNPqB1mPiCR8Jk=
-github.com/line/tm-db/v2 v2.0.0-init.1.0.20210325025547-0ea105c02281 h1:HwehzGvsgPHND01825UbjjiKgwfbqIYFAnvn6OheLQs=
-github.com/line/tm-db/v2 v2.0.0-init.1.0.20210325025547-0ea105c02281/go.mod h1:TiTwPFffNAqep0nV0YWaxPjElbCp6yG4K8SCxy69mE4=
+github.com/line/ostracon v0.34.9-0.20210406083837-4183d649b30c h1:OYIm2Wu22kFoocMgnjU5O/TIphYLHw9q9+e6AsKPkOA=
+github.com/line/ostracon v0.34.9-0.20210406083837-4183d649b30c/go.mod h1:/Ov0QcWRleL6TKmHpPMyIx9roxAc/DD1m3N8xST2b0I=
+github.com/line/tm-db v0.5.2 h1:P8kMpcrm9Xyfl6QLyafssNIoIeC01k0fhw2zDvKhtl4=
+github.com/line/tm-db v0.5.2/go.mod h1:VrPTx04QJhQ9d8TFUTc2GpPBvBf/U9vIdBIzkjBk7Lk=
+github.com/line/tm-db/v2 v2.0.0-init.1.0.20210406062110-9424ca70955a h1:qSt/WwORC5+nVRnNqx+A0oo5gOCsoVJ0HmHF5Db1YvY=
+github.com/line/tm-db/v2 v2.0.0-init.1.0.20210406062110-9424ca70955a/go.mod h1:wmkyPabXjtVZ1dvRofmurjaceghywtCSYGqFuFS+TbI=
 github.com/line/wasmvm v0.12.0-0.1.0 h1:Xul8w8pLWZDcp0kkz1Y9M6tfZ4WnmMt9g0U/d6lXdE4=
 github.com/line/wasmvm v0.12.0-0.1.0/go.mod h1:tbXGE9Jz6sYpiJroGr71OQ5TFOufq/P5LWsruA2u6JE=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
@@ -577,10 +586,6 @@ github.com/tendermint/go-amino v0.16.0 h1:GyhmgQKvqF82e2oZeuMSp9JTN0N09emoSZlb2l
 github.com/tendermint/go-amino v0.16.0/go.mod h1:TQU0M1i/ImAo+tYpZi73AU3V/dKeCoMC9Sphe2ZwGME=
 github.com/tendermint/iavl v0.14.3 h1:tuiUAqJdA3OOyPU/9P3pMYnAcd+OL7BUdzNiE3ytUwQ=
 github.com/tendermint/iavl v0.14.3/go.mod h1:vHLYxU/zuxBmxxr1v+5Vnd/JzcIsyK17n9P9RDubPVU=
-github.com/tendermint/tendermint v0.33.9 h1:rRKIfu5qAXX5f9bwX1oUXSZz/ALFJjDuivhkbGUQxiU=
-github.com/tendermint/tendermint v0.33.9/go.mod h1:0yUs9eIuuDq07nQql9BmI30FtYGcEC60Tu5JzB5IezM=
-github.com/tendermint/tm-db v0.5.2 h1:QG3IxQZBubWlr7kGQcYIavyTNmZRO+r//nENxoq0g34=
-github.com/tendermint/tm-db v0.5.2/go.mod h1:VrPTx04QJhQ9d8TFUTc2GpPBvBf/U9vIdBIzkjBk7Lk=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926/go.mod h1:9ESjWnEqriFuLhtthL60Sar/7RFoluCcXsuvEwTV5KM=

server/start.go

@@ -9,7 +9,7 @@ import (
 	"time"
 
 	"github.com/line/ostracon/abci/server"
-	ostcmd "github.com/line/ostracon/cmd/tendermint/commands"
+	ostcmd "github.com/line/ostracon/cmd/ostracon/commands"
 	ostos "github.com/line/ostracon/libs/os"
 	"github.com/line/ostracon/node"
 	"github.com/line/ostracon/p2p"

server/tm_cmds.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"strings"
 
-	ostcmd "github.com/line/ostracon/cmd/tendermint/commands"
+	ostcmd "github.com/line/ostracon/cmd/ostracon/commands"
 	"github.com/line/ostracon/libs/cli"
 	"github.com/line/ostracon/p2p"
 	pvm "github.com/line/ostracon/privval"

store/cachekv/memiterator.go

@@ -1,11 +1,10 @@
 package cachekv
 
 import (
+	"bytes"
 	"container/list"
 	"errors"
 
-	tmdb "github.com/line/tm-db/v2"
-
 	"github.com/line/lbm-sdk/v2/types/kv"
 )
 
@@ -18,14 +17,24 @@ type memIterator struct {
 	ascending  bool
 }
 
+func IsKeyInDomain(key, start, end []byte) bool {
+	if bytes.Compare(key, start) < 0 {
+		return false
+	}
+	if end != nil && bytes.Compare(end, key) <= 0 {
+		return false
+	}
+	return true
+}
+
 func newMemIterator(start, end []byte, items *list.List, ascending bool) *memIterator {
 	itemsInDomain := make([]*kv.Pair, 0, items.Len())
 
 	var entered bool
 
 	for e := items.Front(); e != nil; e = e.Next() {
 		item := e.Value.(*kv.Pair)
-		if !tmdb.IsKeyInDomain(item.Key, start, end) {
+		if !IsKeyInDomain(item.Key, start, end) {
 			if entered {
 				break
 			}

store/cachekv/mergeiterator.go

@@ -32,27 +32,6 @@ func newCacheMergeIterator(parent, cache types.Iterator, ascending bool) *cacheM
 	return iter
 }
 
-// Domain implements Iterator.
-// If the domains are different, returns the union.
-func (iter *cacheMergeIterator) Domain() (start, end []byte) {
-	startP, endP := iter.parent.Domain()
-	startC, endC := iter.cache.Domain()
-
-	if iter.compare(startP, startC) < 0 {
-		start = startP
-	} else {
-		start = startC
-	}
-
-	if iter.compare(endP, endC) < 0 {
-		end = endC
-	} else {
-		end = endP
-	}
-
-	return start, end
-}
-
 // Valid implements Iterator.
 func (iter *cacheMergeIterator) Valid() bool {
 	return iter.skipUntilExistsOrInvalid()

store/cachekv/store.go

@@ -10,8 +10,6 @@ import (
 	"time"
 	"unsafe"
 
-	tmdb "github.com/line/tm-db/v2"
-
 	"github.com/line/lbm-sdk/v2/store/tracekv"
 	"github.com/line/lbm-sdk/v2/store/types"
 	"github.com/line/lbm-sdk/v2/telemetry"
@@ -207,7 +205,7 @@ func (store *Store) dirtyItems(start, end []byte) {
 
 	n := len(store.unsortedCache)
 	for key := range store.unsortedCache {
-		if tmdb.IsKeyInDomain(strToByte(key), start, end) {
+		if IsKeyInDomain(strToByte(key), start, end) {
 			cacheValue := store.cache[key]
 			unsorted = append(unsorted, &kv.Pair{Key: []byte(key), Value: cacheValue.value})
 		}

store/gaskv/store.go

@@ -129,11 +129,6 @@ func newGasIterator(gasMeter types.GasMeter, gasConfig types.GasConfig, parent t
 	}
 }
 
-// Implements Iterator.
-func (gi *gasIterator) Domain() (start []byte, end []byte) {
-	return gi.parent.Domain()
-}
-
 // Implements Iterator.
 func (gi *gasIterator) Valid() bool {
 	return gi.parent.Valid()

store/gaskv/store_test.go

@@ -50,9 +50,6 @@ func TestGasKVStoreIterator(t *testing.T) {
 	st.Set(keyFmt(2), valFmt(2))
 
 	iterator := st.Iterator(nil, nil)
-	start, end := iterator.Domain()
-	require.Nil(t, start)
-	require.Nil(t, end)
 	require.NoError(t, iterator.Error())
 
 	t.Cleanup(func() {

store/prefix/store_test.go

@@ -167,7 +167,6 @@ func TestPrefixStoreIteratorEdgeCase(t *testing.T) {
 
 	iter := prefixStore.Iterator(nil, nil)
 
-	checkDomain(t, iter, nil, nil)
 	checkItem(t, iter, []byte{}, bz(""))
 	checkNext(t, iter, true)
 	checkItem(t, iter, []byte{0x00}, bz(""))
@@ -197,7 +196,6 @@ func TestPrefixStoreReverseIteratorEdgeCase(t *testing.T) {
 
 	iter := prefixStore.ReverseIterator(nil, nil)
 
-	checkDomain(t, iter, nil, nil)
 	checkItem(t, iter, []byte{0x00}, bz(""))
 	checkNext(t, iter, true)
 	checkItem(t, iter, []byte{}, bz(""))
@@ -224,7 +222,6 @@ func TestPrefixStoreReverseIteratorEdgeCase(t *testing.T) {
 
 	iter = prefixStore.ReverseIterator(nil, nil)
 
-	checkDomain(t, iter, nil, nil)
 	checkItem(t, iter, []byte{0x00}, bz(""))
 	checkNext(t, iter, true)
 	checkItem(t, iter, []byte{}, bz(""))
@@ -268,12 +265,6 @@ func checkNext(t *testing.T, itr types.Iterator, expected bool) {
 	require.Equal(t, expected, valid)
 }
 
-func checkDomain(t *testing.T, itr types.Iterator, start, end []byte) {
-	ds, de := itr.Domain()
-	require.Equal(t, start, ds)
-	require.Equal(t, end, de)
-}
-
 func checkItem(t *testing.T, itr types.Iterator, key, value []byte) {
 	require.Exactly(t, key, itr.Key())
 	require.Exactly(t, value, itr.Value())
@@ -321,7 +312,6 @@ func TestPrefixDBIterator1(t *testing.T) {
 	pstore := NewStore(store, bz("key"))
 
 	itr := pstore.Iterator(nil, nil)
-	checkDomain(t, itr, nil, nil)
 	checkItem(t, itr, bz(""), bz("value"))
 	checkNext(t, itr, true)
 	checkItem(t, itr, bz("1"), bz("value1"))
@@ -339,7 +329,6 @@ func TestPrefixDBIterator2(t *testing.T) {
 	pstore := NewStore(store, bz("key"))
 
 	itr := pstore.Iterator(nil, bz(""))
-	checkDomain(t, itr, nil, bz(""))
 	checkInvalid(t, itr)
 	itr.Close()
 }
@@ -349,7 +338,6 @@ func TestPrefixDBIterator3(t *testing.T) {
 	pstore := NewStore(store, bz("key"))
 
 	itr := pstore.Iterator(bz(""), nil)
-	checkDomain(t, itr, bz(""), nil)
 	checkItem(t, itr, bz(""), bz("value"))
 	checkNext(t, itr, true)
 	checkItem(t, itr, bz("1"), bz("value1"))
@@ -367,7 +355,6 @@ func TestPrefixDBIterator4(t *testing.T) {
 	pstore := NewStore(store, bz("key"))
 
 	itr := pstore.Iterator(bz(""), bz(""))
-	checkDomain(t, itr, bz(""), bz(""))
 	checkInvalid(t, itr)
 	itr.Close()
 }
@@ -377,7 +364,6 @@ func TestPrefixDBReverseIterator1(t *testing.T) {
 	pstore := NewStore(store, bz("key"))
 
 	itr := pstore.ReverseIterator(nil, nil)
-	checkDomain(t, itr, nil, nil)
 	checkItem(t, itr, bz("3"), bz("value3"))
 	checkNext(t, itr, true)
 	checkItem(t, itr, bz("2"), bz("value2"))
@@ -395,7 +381,6 @@ func TestPrefixDBReverseIterator2(t *testing.T) {
 	pstore := NewStore(store, bz("key"))
 
 	itr := pstore.ReverseIterator(bz(""), nil)
-	checkDomain(t, itr, bz(""), nil)
 	checkItem(t, itr, bz("3"), bz("value3"))
 	checkNext(t, itr, true)
 	checkItem(t, itr, bz("2"), bz("value2"))
@@ -413,7 +398,6 @@ func TestPrefixDBReverseIterator3(t *testing.T) {
 	pstore := NewStore(store, bz("key"))
 
 	itr := pstore.ReverseIterator(nil, bz(""))
-	checkDomain(t, itr, nil, bz(""))
 	checkInvalid(t, itr)
 	itr.Close()
 }

store/rootmulti/store.go

@@ -15,6 +15,7 @@ import (
 	iavltree "github.com/line/iavl/v2"
 	abci "github.com/line/ostracon/abci/types"
 	tmdb "github.com/line/tm-db/v2"
+	"github.com/line/tm-db/v2/prefixdb"
 	"github.com/pkg/errors"
 
 	"github.com/line/lbm-sdk/v2/snapshots"
@@ -814,10 +815,10 @@ func (rs *Store) loadCommitStoreFromParams(key types.StoreKey, id types.CommitID
 	var db tmdb.DB
 
 	if params.db != nil {
-		db = tmdb.NewPrefixDB(params.db, []byte("s/_/"))
+		db = prefixdb.NewDB(params.db, []byte("s/_/"))
 	} else {
 		prefix := "s/k:" + params.key.Name() + "/"
-		db = tmdb.NewPrefixDB(rs.db, []byte(prefix))
+		db = prefixdb.NewDB(rs.db, []byte(prefix))
 	}
 
 	switch params.typ {

store/tracekv/store.go

@@ -114,11 +114,6 @@ func newTraceIterator(w io.Writer, parent types.Iterator, tc types.TraceContext)
 	return &traceIterator{writer: w, parent: parent, context: tc}
 }
 
-// Domain implements the Iterator interface.
-func (ti *traceIterator) Domain() (start []byte, end []byte) {
-	return ti.parent.Domain()
-}
-
 // Valid implements the Iterator interface.
 func (ti *traceIterator) Valid() bool {
 	return ti.parent.Valid()

store/tracekv/store_test.go

@@ -164,10 +164,6 @@ func TestTestTraceKVStoreIterator(t *testing.T) {
 	store := newTraceKVStore(&buf)
 	iterator := store.Iterator(nil, nil)
 
-	s, e := iterator.Domain()
-	require.Equal(t, []byte(nil), s)
-	require.Equal(t, []byte(nil), e)
-
 	testCases := []struct {
 		expectedKey      []byte
 		expectedValue    []byte
@@ -220,10 +216,6 @@ func TestTestTraceKVStoreReverseIterator(t *testing.T) {
 	store := newTraceKVStore(&buf)
 	iterator := store.ReverseIterator(nil, nil)
 
-	s, e := iterator.Domain()
-	require.Equal(t, []byte(nil), s)
-	require.Equal(t, []byte(nil), e)
-
 	testCases := []struct {
 		expectedKey      []byte
 		expectedValue    []byte