diff --git a/arbnode/batch_poster.go b/arbnode/batch_poster.go
index 42b983f0fb..8144c9b7be 100644
--- a/arbnode/batch_poster.go
+++ b/arbnode/batch_poster.go
@@ -11,6 +11,7 @@ import (
 	"fmt"
 	"math"
 	"math/big"
+	"strings"
 	"sync/atomic"
 	"time"
 
@@ -262,12 +263,13 @@ func NewBatchPoster(dataPosterDB ethdb.Database, l1Reader *headerreader.HeaderRe
 // contain reverted batch_poster transaction.
 // It returns true if it finds batch posting needs to halt, which is true if a batch reverts
 // unless the data poster is configured with noop storage which can tolerate reverts.
-func (b *BatchPoster) checkReverts(ctx context.Context, from, to int64) (bool, error) {
-	if from > to {
-		return false, fmt.Errorf("wrong range, from: %d is more to: %d", from, to)
+// From must be a pointer to the starting block, which is updated after each block is checked for reverts
+func (b *BatchPoster) checkReverts(ctx context.Context, from *int64, to int64) (bool, error) {
+	if *from > to {
+		return false, fmt.Errorf("wrong range, from: %d > to: %d", from, to)
 	}
-	for idx := from; idx <= to; idx++ {
-		number := big.NewInt(idx)
+	for ; *from <= to; *from++ {
+		number := big.NewInt(*from)
 		block, err := b.l1Reader.Client().BlockByNumber(ctx, number)
 		if err != nil {
 			return false, fmt.Errorf("getting block: %v by number: %w", number, err)
@@ -277,7 +279,7 @@ func (b *BatchPoster) checkReverts(ctx context.Context, from, to int64) (bool, e
 			if err != nil {
 				return false, fmt.Errorf("getting sender of transaction tx: %v, %w", tx.Hash(), err)
 			}
-			if bytes.Equal(from.Bytes(), b.dataPoster.Sender().Bytes()) {
+			if from == b.dataPoster.Sender() {
 				r, err := b.l1Reader.Client().TransactionReceipt(ctx, tx.Hash())
 				if err != nil {
 					return false, fmt.Errorf("getting a receipt for transaction: %v, %w", tx.Hash(), err)
@@ -303,7 +305,7 @@ func (b *BatchPoster) pollForReverts(ctx context.Context) {
 	headerCh, unsubscribe := b.l1Reader.Subscribe(false)
 	defer unsubscribe()
 
-	last := int64(0) // number of last seen block
+	nextToCheck := int64(0) // the first unchecked block
 	for {
 		// Poll until:
 		// - L1 headers reader channel is closed, or
@@ -312,31 +314,37 @@ func (b *BatchPoster) pollForReverts(ctx context.Context) {
 		select {
 		case h, ok := <-headerCh:
 			if !ok {
-				log.Info("L1 headers channel has been closed")
+				log.Info("L1 headers channel checking for batch poster reverts has been closed")
 				return
 			}
 			// If this is the first block header, set last seen as number-1.
 			// We may see same block number again if there is L1 reorg, in that
 			// case we check the block again.
-			if last == 0 || last == h.Number.Int64() {
-				last = h.Number.Int64() - 1
+			if nextToCheck == 0 || nextToCheck == h.Number.Int64() {
+				nextToCheck = h.Number.Int64()
 			}
-			if h.Number.Int64()-last > 100 {
-				log.Warn("Large gap between last seen and current block number, skipping check for reverts", "last", last, "current", h.Number)
-				last = h.Number.Int64()
+			if h.Number.Int64()-nextToCheck > 100 {
+				log.Warn("Large gap between last seen and current block number, skipping check for reverts", "last", nextToCheck, "current", h.Number)
+				nextToCheck = h.Number.Int64()
 				continue
 			}
 
-			reverted, err := b.checkReverts(ctx, last+1, h.Number.Int64())
+			reverted, err := b.checkReverts(ctx, &nextToCheck, h.Number.Int64())
 			if err != nil {
-				log.Error("Checking batch reverts", "error", err)
+				logLevel := log.Error
+				if strings.Contains(err.Error(), "not found") {
+					// Just parent chain node inconsistency
+					// One node sent us a block, but another didn't have it
+					// We'll try to check this block again next loop
+					logLevel = log.Debug
+				}
+				logLevel("Error checking batch reverts", "err", err)
 				continue
 			}
 			if reverted {
 				b.batchReverted.Store(true)
 				return
 			}
-			last = h.Number.Int64()
 		case <-ctx.Done():
 			return
 		}
diff --git a/arbnode/execution/tx_pre_checker.go b/arbnode/execution/tx_pre_checker.go
index dc069a6d18..968a1f266b 100644
--- a/arbnode/execution/tx_pre_checker.go
+++ b/arbnode/execution/tx_pre_checker.go
@@ -145,11 +145,6 @@ func PreCheckTx(bc *core.BlockChain, chainConfig *params.ChainConfig, header *ty
 	if config.Strictness < TxPreCheckerStrictnessLikelyCompatible {
 		return nil
 	}
-	balance := statedb.GetBalance(sender)
-	cost := tx.Cost()
-	if arbmath.BigLessThan(balance, cost) {
-		return fmt.Errorf("%w: address %v have %v want %v", core.ErrInsufficientFunds, sender, balance, cost)
-	}
 	if options != nil {
 		if err := options.Check(extraInfo.L1BlockNumber, header.Time, statedb); err != nil {
 			conditionalTxRejectedByTxPreCheckerCurrentStateCounter.Inc(1)
@@ -185,6 +180,11 @@ func PreCheckTx(bc *core.BlockChain, chainConfig *params.ChainConfig, header *ty
 			conditionalTxAcceptedByTxPreCheckerOldStateCounter.Inc(1)
 		}
 	}
+	balance := statedb.GetBalance(sender)
+	cost := tx.Cost()
+	if arbmath.BigLessThan(balance, cost) {
+		return fmt.Errorf("%w: address %v have %v want %v", core.ErrInsufficientFunds, sender, balance, cost)
+	}
 	if config.Strictness >= TxPreCheckerStrictnessFullValidation && tx.Nonce() > stateNonce {
 		return MakeNonceError(sender, tx.Nonce(), stateNonce)
 	}
diff --git a/arbnode/node.go b/arbnode/node.go
index 356c46681f..5bdc716264 100644
--- a/arbnode/node.go
+++ b/arbnode/node.go
@@ -40,6 +40,7 @@ import (
 	"github.com/offchainlabs/nitro/solgen/go/bridgegen"
 	"github.com/offchainlabs/nitro/solgen/go/challengegen"
 	"github.com/offchainlabs/nitro/solgen/go/ospgen"
+	"github.com/offchainlabs/nitro/solgen/go/precompilesgen"
 	"github.com/offchainlabs/nitro/solgen/go/rollupgen"
 	"github.com/offchainlabs/nitro/staker"
 	"github.com/offchainlabs/nitro/util/contracts"
@@ -604,7 +605,8 @@ func createNodeImpl(
 
 	var l1Reader *headerreader.HeaderReader
 	if config.ParentChainReader.Enable {
-		l1Reader, err = headerreader.New(ctx, l1client, func() *headerreader.Config { return &configFetcher.Get().ParentChainReader })
+		arbSys, _ := precompilesgen.NewArbSys(types.ArbSysAddress, l1client)
+		l1Reader, err = headerreader.New(ctx, l1client, func() *headerreader.Config { return &configFetcher.Get().ParentChainReader }, arbSys)
 		if err != nil {
 			return nil, err
 		}
diff --git a/cmd/daserver/daserver.go b/cmd/daserver/daserver.go
index 7cdfc39915..335aba6a1b 100644
--- a/cmd/daserver/daserver.go
+++ b/cmd/daserver/daserver.go
@@ -17,6 +17,7 @@ import (
 	flag "github.com/spf13/pflag"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/metrics"
 	"github.com/ethereum/go-ethereum/metrics/exp"
@@ -24,6 +25,7 @@ import (
 	"github.com/offchainlabs/nitro/cmd/genericconf"
 	"github.com/offchainlabs/nitro/cmd/util/confighelpers"
 	"github.com/offchainlabs/nitro/das"
+	"github.com/offchainlabs/nitro/solgen/go/precompilesgen"
 	"github.com/offchainlabs/nitro/util/headerreader"
 )
 
@@ -196,7 +198,8 @@ func startup() error {
 		if err != nil {
 			return err
 		}
-		l1Reader, err = headerreader.New(ctx, l1Client, func() *headerreader.Config { return &headerreader.DefaultConfig }) // TODO: config
+		arbSys, _ := precompilesgen.NewArbSys(types.ArbSysAddress, l1Client)
+		l1Reader, err = headerreader.New(ctx, l1Client, func() *headerreader.Config { return &headerreader.DefaultConfig }, arbSys) // TODO: config
 		if err != nil {
 			return err
 		}
diff --git a/cmd/deploy/deploy.go b/cmd/deploy/deploy.go
index 17725a7a4c..d687821e8b 100644
--- a/cmd/deploy/deploy.go
+++ b/cmd/deploy/deploy.go
@@ -14,10 +14,12 @@ import (
 
 	"github.com/offchainlabs/nitro/cmd/chaininfo"
 	"github.com/offchainlabs/nitro/cmd/genericconf"
+	"github.com/offchainlabs/nitro/solgen/go/precompilesgen"
 	"github.com/offchainlabs/nitro/util/headerreader"
 	"github.com/offchainlabs/nitro/validator/server_common"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/params"
@@ -127,7 +129,8 @@ func main() {
 		panic(fmt.Errorf("failed to deserialize chain config: %w", err))
 	}
 
-	l1Reader, err := headerreader.New(ctx, l1client, func() *headerreader.Config { return &headerReaderConfig })
+	arbSys, _ := precompilesgen.NewArbSys(types.ArbSysAddress, l1client)
+	l1Reader, err := headerreader.New(ctx, l1client, func() *headerreader.Config { return &headerReaderConfig }, arbSys)
 	if err != nil {
 		panic(fmt.Errorf("failed to create header reader: %w", err))
 	}
diff --git a/cmd/nitro/nitro.go b/cmd/nitro/nitro.go
index 4ebe598ee9..a7dc7f26f9 100644
--- a/cmd/nitro/nitro.go
+++ b/cmd/nitro/nitro.go
@@ -28,6 +28,7 @@ import (
 	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/arbitrum"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	_ "github.com/ethereum/go-ethereum/eth/tracers/js"
 	_ "github.com/ethereum/go-ethereum/eth/tracers/native"
@@ -48,6 +49,7 @@ import (
 	"github.com/offchainlabs/nitro/cmd/util"
 	"github.com/offchainlabs/nitro/cmd/util/confighelpers"
 	_ "github.com/offchainlabs/nitro/nodeInterface"
+	"github.com/offchainlabs/nitro/solgen/go/precompilesgen"
 	"github.com/offchainlabs/nitro/staker"
 	"github.com/offchainlabs/nitro/util/colors"
 	"github.com/offchainlabs/nitro/util/headerreader"
@@ -354,7 +356,8 @@ func mainImpl() int {
 			flag.Usage()
 			log.Crit("--node.validator.only-create-wallet-contract requires --node.validator.use-smart-contract-wallet")
 		}
-		l1Reader, err := headerreader.New(ctx, l1Client, func() *headerreader.Config { return &liveNodeConfig.Get().Node.ParentChainReader })
+		arbSys, _ := precompilesgen.NewArbSys(types.ArbSysAddress, l1Client)
+		l1Reader, err := headerreader.New(ctx, l1Client, func() *headerreader.Config { return &liveNodeConfig.Get().Node.ParentChainReader }, arbSys)
 		if err != nil {
 			log.Crit("failed to get L1 headerreader", "error", err)
 		}
diff --git a/staker/staker.go b/staker/staker.go
index 8fdbbd648f..1b6538b161 100644
--- a/staker/staker.go
+++ b/staker/staker.go
@@ -552,11 +552,11 @@ func (s *Staker) confirmDataPosterIsReady(ctx context.Context) error {
 }
 
 func (s *Staker) Act(ctx context.Context) (*types.Transaction, error) {
-	err := s.confirmDataPosterIsReady(ctx)
-	if err != nil {
-		return nil, err
-	}
 	if s.config.strategy != WatchtowerStrategy {
+		err := s.confirmDataPosterIsReady(ctx)
+		if err != nil {
+			return nil, err
+		}
 		whitelisted, err := s.IsWhitelisted(ctx)
 		if err != nil {
 			return nil, fmt.Errorf("error checking if whitelisted: %w", err)
diff --git a/system_tests/common_test.go b/system_tests/common_test.go
index b92fbf7578..9fd002bd94 100644
--- a/system_tests/common_test.go
+++ b/system_tests/common_test.go
@@ -476,7 +476,8 @@ func DeployOnTestL1(
 	serializedChainConfig, err := json.Marshal(chainConfig)
 	Require(t, err)
 
-	l1Reader, err := headerreader.New(ctx, l1client, func() *headerreader.Config { return &headerreader.TestConfig })
+	arbSys, _ := precompilesgen.NewArbSys(types.ArbSysAddress, l1client)
+	l1Reader, err := headerreader.New(ctx, l1client, func() *headerreader.Config { return &headerreader.TestConfig }, arbSys)
 	Require(t, err)
 	l1Reader.Start(ctx)
 	defer l1Reader.StopAndWait()
diff --git a/system_tests/das_test.go b/system_tests/das_test.go
index 7952120933..8889d2d53d 100644
--- a/system_tests/das_test.go
+++ b/system_tests/das_test.go
@@ -28,6 +28,7 @@ import (
 	"github.com/offchainlabs/nitro/cmd/genericconf"
 	"github.com/offchainlabs/nitro/das"
 	"github.com/offchainlabs/nitro/solgen/go/bridgegen"
+	"github.com/offchainlabs/nitro/solgen/go/precompilesgen"
 	"github.com/offchainlabs/nitro/util/headerreader"
 	"github.com/offchainlabs/nitro/util/signature"
 )
@@ -233,7 +234,8 @@ func TestDASComplexConfigAndRestMirror(t *testing.T) {
 	chainConfig := params.ArbitrumDevTestDASChainConfig()
 	l1info, l1client, _, l1stack := createTestL1BlockChain(t, nil)
 	defer requireClose(t, l1stack)
-	l1Reader, err := headerreader.New(ctx, l1client, func() *headerreader.Config { return &headerreader.TestConfig })
+	arbSys, _ := precompilesgen.NewArbSys(types.ArbSysAddress, l1client)
+	l1Reader, err := headerreader.New(ctx, l1client, func() *headerreader.Config { return &headerreader.TestConfig }, arbSys)
 	Require(t, err)
 	l1Reader.Start(ctx)
 	defer l1Reader.StopAndWait()
diff --git a/util/headerreader/header_reader.go b/util/headerreader/header_reader.go
index e5807224c0..befd54ace3 100644
--- a/util/headerreader/header_reader.go
+++ b/util/headerreader/header_reader.go
@@ -18,17 +18,20 @@ import (
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/offchainlabs/nitro/arbutil"
-	"github.com/offchainlabs/nitro/solgen/go/precompilesgen"
 	"github.com/offchainlabs/nitro/util/stopwaiter"
 	flag "github.com/spf13/pflag"
 )
 
+type ArbSysInterface interface {
+	ArbBlockNumber(*bind.CallOpts) (*big.Int, error)
+}
+
 type HeaderReader struct {
 	stopwaiter.StopWaiter
 	config                ConfigFetcher
 	client                arbutil.L1Interface
 	isParentChainArbitrum bool
-	arbSys                *precompilesgen.ArbSys
+	arbSys                ArbSysInterface
 
 	chanMutex sync.RWMutex
 	// All fields below require the chanMutex
@@ -91,19 +94,18 @@ var TestConfig = Config{
 	UseFinalityData:  false,
 }
 
-func New(ctx context.Context, client arbutil.L1Interface, config ConfigFetcher) (*HeaderReader, error) {
+func New(ctx context.Context, client arbutil.L1Interface, config ConfigFetcher, arbSysPrecompile ArbSysInterface) (*HeaderReader, error) {
 	isParentChainArbitrum := false
-	var arbSys *precompilesgen.ArbSys
-	codeAt, err := client.CodeAt(ctx, types.ArbSysAddress, nil)
-	if err != nil {
-		return nil, err
-	}
-	if len(codeAt) != 0 {
-		isParentChainArbitrum = true
-		arbSys, err = precompilesgen.NewArbSys(types.ArbSysAddress, client)
+	var arbSys ArbSysInterface
+	if arbSysPrecompile != nil {
+		codeAt, err := client.CodeAt(ctx, types.ArbSysAddress, nil)
 		if err != nil {
 			return nil, err
 		}
+		if len(codeAt) != 0 {
+			isParentChainArbitrum = true
+			arbSys = arbSysPrecompile
+		}
 	}
 	return &HeaderReader{
 		client:                client,