eth/catalyst: update implementation to spec (#24802)

* eth/catalyst: return invalid payload attributes error * eth/catalyst: implement LVH as specified, add tests * eth/catalyst: return current block hash not header hash * eth/catalyst: fix test * eth/catalyst: bring error codes in line with spec
2024-12-22 03:30:35 +00:00 · 2022-05-20 10:12:12 +02:00 · 2022-05-20 10:12:12 +02:00 · 4a4d531052
commit 4a4d531052
parent 310f751639
4 changed files with 283 additions and 85 deletions
--- a/core/beacon/errors.go
+++ b/core/beacon/errors.go
@ -43,9 +43,10 @@ var (

 	INVALIDBLOCKHASH = "INVALID_BLOCK_HASH"

-	GenericServerError = rpc.CustomError{Code: -32000, ValidationError: "Server error"}
-	UnknownPayload     = rpc.CustomError{Code: -32001, ValidationError: "Unknown payload"}
-	InvalidTB          = rpc.CustomError{Code: -32002, ValidationError: "Invalid terminal block"}
+	GenericServerError       = rpc.CustomError{Code: -32000, ValidationError: "Server error"}
+	UnknownPayload           = rpc.CustomError{Code: -38001, ValidationError: "Unknown payload"}
+	InvalidForkChoiceState   = rpc.CustomError{Code: -38002, ValidationError: "Invalid forkchoice state"}
+	InvalidPayloadAttributes = rpc.CustomError{Code: -38003, ValidationError: "Invalid payload attributes"}

 	STATUS_INVALID         = ForkChoiceResponse{PayloadStatus: PayloadStatusV1{Status: INVALID}, PayloadID: nil}
 	STATUS_SYNCING         = ForkChoiceResponse{PayloadStatus: PayloadStatusV1{Status: SYNCING}, PayloadID: nil}
--- a/eth/catalyst/api.go
+++ b/eth/catalyst/api.go
@ -29,6 +29,7 @@ import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core/beacon"
 	"github.com/ethereum/go-ethereum/core/rawdb"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/node"
@ -165,10 +166,10 @@ func (api *ConsensusAPI) ForkchoiceUpdatedV1(update beacon.ForkchoiceStateV1, pa
 		finalBlock := api.eth.BlockChain().GetBlockByHash(update.FinalizedBlockHash)
 		if finalBlock == nil {
 			log.Warn("Final block not available in database", "hash", update.FinalizedBlockHash)
-			return beacon.STATUS_INVALID, errors.New("final block not available")
+			return beacon.STATUS_INVALID, &beacon.InvalidForkChoiceState
 		} else if rawdb.ReadCanonicalHash(api.eth.ChainDb(), finalBlock.NumberU64()) != update.FinalizedBlockHash {
 			log.Warn("Final block not in canonical chain", "number", block.NumberU64(), "hash", update.HeadBlockHash)
-			return beacon.STATUS_INVALID, errors.New("final block not canonical")
+			return beacon.STATUS_INVALID, &beacon.InvalidForkChoiceState
 		}
 		// Set the finalized block
 		api.eth.BlockChain().SetFinalized(finalBlock)
@ -178,11 +179,11 @@ func (api *ConsensusAPI) ForkchoiceUpdatedV1(update beacon.ForkchoiceStateV1, pa
 		safeBlock := api.eth.BlockChain().GetBlockByHash(update.SafeBlockHash)
 		if safeBlock == nil {
 			log.Warn("Safe block not available in database")
-			return beacon.STATUS_INVALID, errors.New("safe head not available")
+			return beacon.STATUS_INVALID, &beacon.InvalidForkChoiceState
 		}
 		if rawdb.ReadCanonicalHash(api.eth.ChainDb(), safeBlock.NumberU64()) != update.SafeBlockHash {
 			log.Warn("Safe block not in canonical chain")
-			return beacon.STATUS_INVALID, errors.New("safe head not canonical")
+			return beacon.STATUS_INVALID, &beacon.InvalidForkChoiceState
 		}
 	}

@ -200,13 +201,15 @@ func (api *ConsensusAPI) ForkchoiceUpdatedV1(update beacon.ForkchoiceStateV1, pa
 		// Create an empty block first which can be used as a fallback
 		empty, err := api.eth.Miner().GetSealingBlockSync(update.HeadBlockHash, payloadAttributes.Timestamp, payloadAttributes.SuggestedFeeRecipient, payloadAttributes.Random, true)
 		if err != nil {
-			return valid(nil), err
+			log.Error("Failed to create empty sealing payload", "err", err)
+			return valid(nil), &beacon.InvalidPayloadAttributes
 		}
 		// Send a request to generate a full block in the background.
 		// The result can be obtained via the returned channel.
 		resCh, err := api.eth.Miner().GetSealingBlockAsync(update.HeadBlockHash, payloadAttributes.Timestamp, payloadAttributes.SuggestedFeeRecipient, payloadAttributes.Random, false)
 		if err != nil {
-			return valid(nil), err
+			log.Error("Failed to create async sealing payload", "err", err)
+			return valid(nil), &beacon.InvalidPayloadAttributes
 		}
 		id := computePayloadId(update.HeadBlockHash, payloadAttributes)
 		api.localBlocks.put(id, &payload{empty: empty, result: resCh})
@ -303,7 +306,7 @@ func (api *ConsensusAPI) NewPayloadV1(params beacon.ExecutableDataV1) (beacon.Pa
 	}
 	if block.Time() <= parent.Time() {
 		log.Warn("Invalid timestamp", "parent", block.Time(), "block", block.Time())
-		return api.invalid(errors.New("invalid timestamp")), nil
+		return api.invalid(errors.New("invalid timestamp"), parent), nil
 	}
 	if !api.eth.BlockChain().HasBlockAndState(block.ParentHash(), block.NumberU64()-1) {
 		api.remoteBlocks.put(block.Hash(), block.Header())
@ -313,7 +316,7 @@ func (api *ConsensusAPI) NewPayloadV1(params beacon.ExecutableDataV1) (beacon.Pa
 	log.Trace("Inserting block without sethead", "hash", block.Hash(), "number", block.Number)
 	if err := api.eth.BlockChain().InsertBlockWithoutSetHead(block); err != nil {
 		log.Warn("NewPayloadV1: inserting block failed", "error", err)
-		return api.invalid(err), nil
+		return api.invalid(err, parent), nil
 	}
 	// We've accepted a valid payload from the beacon client. Mark the local
 	// chain transitions to notify other subsystems (e.g. downloader) of the
@ -339,9 +342,13 @@ func computePayloadId(headBlockHash common.Hash, params *beacon.PayloadAttribute
 	return out
 }

-// invalid returns a response "INVALID" with the latest valid hash set to the current head.
-func (api *ConsensusAPI) invalid(err error) beacon.PayloadStatusV1 {
-	currentHash := api.eth.BlockChain().CurrentHeader().Hash()
+// invalid returns a response "INVALID" with the latest valid hash supplied by latest or to the current head
+// if no latestValid block was provided.
+func (api *ConsensusAPI) invalid(err error, latestValid *types.Block) beacon.PayloadStatusV1 {
+	currentHash := api.eth.BlockChain().CurrentBlock().Hash()
+	if latestValid != nil {
+		currentHash = latestValid.Hash()
+	}
 	errorMsg := err.Error()
 	return beacon.PayloadStatusV1{Status: beacon.INVALID, LatestValidHash: &currentHash, ValidationError: &errorMsg}
 }
--- a/eth/catalyst/api_test.go
+++ b/eth/catalyst/api_test.go
@ -17,9 +17,9 @@
 package catalyst

 import (
+	"bytes"
 	"fmt"
 	"math/big"
-	"os"
 	"testing"
 	"time"

@ -32,10 +32,12 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/eth"
+	"github.com/ethereum/go-ethereum/eth/downloader"
 	"github.com/ethereum/go-ethereum/eth/ethconfig"
-	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/node"
+	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/params"
+	"github.com/ethereum/go-ethereum/trie"
 )

 var (
@ -142,47 +144,44 @@ func TestSetHeadBeforeTotalDifficulty(t *testing.T) {
 }

 func TestEth2PrepareAndGetPayload(t *testing.T) {
-	// TODO (MariusVanDerWijden) TestEth2PrepareAndGetPayload is currently broken, fixed in upcoming merge-kiln-v2 pr
-	/*
-		genesis, blocks := generatePreMergeChain(10)
-		// We need to properly set the terminal total difficulty
-		genesis.Config.TerminalTotalDifficulty.Sub(genesis.Config.TerminalTotalDifficulty, blocks[9].Difficulty())
-		n, ethservice := startEthService(t, genesis, blocks[:9])
-		defer n.Close()
+	genesis, blocks := generatePreMergeChain(10)
+	// We need to properly set the terminal total difficulty
+	genesis.Config.TerminalTotalDifficulty.Sub(genesis.Config.TerminalTotalDifficulty, blocks[9].Difficulty())
+	n, ethservice := startEthService(t, genesis, blocks[:9])
+	defer n.Close()

-		api := NewConsensusAPI(ethservice)
+	api := NewConsensusAPI(ethservice)

-		// Put the 10th block's tx in the pool and produce a new block
-		api.insertTransactions(blocks[9].Transactions())
-		blockParams := beacon.PayloadAttributesV1{
-			Timestamp: blocks[8].Time() + 5,
-		}
-		fcState := beacon.ForkchoiceStateV1{
-			HeadBlockHash:      blocks[8].Hash(),
-			SafeBlockHash:      common.Hash{},
-			FinalizedBlockHash: common.Hash{},
-		}
-		_, err := api.ForkchoiceUpdatedV1(fcState, &blockParams)
-		if err != nil {
-			t.Fatalf("error preparing payload, err=%v", err)
-		}
-		payloadID := computePayloadId(fcState.HeadBlockHash, &blockParams)
-		execData, err := api.GetPayloadV1(payloadID)
-		if err != nil {
-			t.Fatalf("error getting payload, err=%v", err)
-		}
-		if len(execData.Transactions) != blocks[9].Transactions().Len() {
-			t.Fatalf("invalid number of transactions %d != 1", len(execData.Transactions))
-		}
-		// Test invalid payloadID
-		var invPayload beacon.PayloadID
-		copy(invPayload[:], payloadID[:])
-		invPayload[0] = ^invPayload[0]
-		_, err = api.GetPayloadV1(invPayload)
-		if err == nil {
-			t.Fatal("expected error retrieving invalid payload")
-		}
-	*/
+	// Put the 10th block's tx in the pool and produce a new block
+	ethservice.TxPool().AddLocals(blocks[9].Transactions())
+	blockParams := beacon.PayloadAttributesV1{
+		Timestamp: blocks[8].Time() + 5,
+	}
+	fcState := beacon.ForkchoiceStateV1{
+		HeadBlockHash:      blocks[8].Hash(),
+		SafeBlockHash:      common.Hash{},
+		FinalizedBlockHash: common.Hash{},
+	}
+	_, err := api.ForkchoiceUpdatedV1(fcState, &blockParams)
+	if err != nil {
+		t.Fatalf("error preparing payload, err=%v", err)
+	}
+	payloadID := computePayloadId(fcState.HeadBlockHash, &blockParams)
+	execData, err := api.GetPayloadV1(payloadID)
+	if err != nil {
+		t.Fatalf("error getting payload, err=%v", err)
+	}
+	if len(execData.Transactions) != blocks[9].Transactions().Len() {
+		t.Fatalf("invalid number of transactions %d != 1", len(execData.Transactions))
+	}
+	// Test invalid payloadID
+	var invPayload beacon.PayloadID
+	copy(invPayload[:], payloadID[:])
+	invPayload[0] = ^invPayload[0]
+	_, err = api.GetPayloadV1(invPayload)
+	if err == nil {
+		t.Fatal("expected error retrieving invalid payload")
+	}
 }

 func checkLogEvents(t *testing.T, logsCh <-chan []*types.Log, rmLogsCh <-chan core.RemovedLogsEvent, wantNew, wantRemoved int) {
@ -396,13 +395,17 @@ func TestEth2DeepReorg(t *testing.T) {
 func startEthService(t *testing.T, genesis *core.Genesis, blocks []*types.Block) (*node.Node, *eth.Ethereum) {
 	t.Helper()

-	// Disable verbose log output which is noise to some extent.
-	log.Root().SetHandler(log.LvlFilterHandler(log.LvlCrit, log.StreamHandler(os.Stderr, log.TerminalFormat(true))))
-	n, err := node.New(&node.Config{})
+	n, err := node.New(&node.Config{
+		P2P: p2p.Config{
+			ListenAddr:  "0.0.0.0:0",
+			NoDiscovery: true,
+			MaxPeers:    25,
+		}})
 	if err != nil {
 		t.Fatal("can't create node:", err)
 	}
-	ethcfg := &ethconfig.Config{Genesis: genesis, Ethash: ethash.Config{PowMode: ethash.ModeFake}, TrieTimeout: time.Minute, TrieDirtyCache: 256, TrieCleanCache: 256}
+
+	ethcfg := &ethconfig.Config{Genesis: genesis, Ethash: ethash.Config{PowMode: ethash.ModeFake}, SyncMode: downloader.SnapSync, TrieTimeout: time.Minute, TrieDirtyCache: 256, TrieCleanCache: 256}
 	ethservice, err := eth.New(n, ethcfg)
 	if err != nil {
 		t.Fatal("can't create eth service:", err)
@ -427,39 +430,28 @@ func TestFullAPI(t *testing.T) {
 	ethservice.Merger().ReachTTD()
 	defer n.Close()
 	var (
-		api    = NewConsensusAPI(ethservice)
 		parent = ethservice.BlockChain().CurrentBlock()
 		// This EVM code generates a log when the contract is created.
 		logCode = common.Hex2Bytes("60606040525b7f24ec1d3ff24c2f6ff210738839dbc339cd45a5294d85c79361016243157aae7b60405180905060405180910390a15b600a8060416000396000f360606040526008565b00")
 	)
-	for i := 0; i < 10; i++ {
+
+	callback := func(parent *types.Block) {
 		statedb, _ := ethservice.BlockChain().StateAt(parent.Root())
 		nonce := statedb.GetNonce(testAddr)
 		tx, _ := types.SignTx(types.NewContractCreation(nonce, new(big.Int), 1000000, big.NewInt(2*params.InitialBaseFee), logCode), types.LatestSigner(ethservice.BlockChain().Config()), testKey)
 		ethservice.TxPool().AddLocal(tx)
+	}

-		params := beacon.PayloadAttributesV1{
-			Timestamp:             parent.Time() + 1,
-			Random:                crypto.Keccak256Hash([]byte{byte(i)}),
-			SuggestedFeeRecipient: parent.Coinbase(),
-		}
+	setupBlocks(t, ethservice, 10, parent, callback)
+}
+
+func setupBlocks(t *testing.T, ethservice *eth.Ethereum, n int, parent *types.Block, callback func(parent *types.Block)) {
+	api := NewConsensusAPI(ethservice)
+	for i := 0; i < n; i++ {
+		callback(parent)
+
+		payload := getNewPayload(t, api, parent)

-		fcState := beacon.ForkchoiceStateV1{
-			HeadBlockHash:      parent.Hash(),
-			SafeBlockHash:      common.Hash{},
-			FinalizedBlockHash: common.Hash{},
-		}
-		resp, err := api.ForkchoiceUpdatedV1(fcState, &params)
-		if err != nil {
-			t.Fatalf("error preparing payload, err=%v", err)
-		}
-		if resp.PayloadStatus.Status != beacon.VALID {
-			t.Fatalf("error preparing payload, invalid status: %v", resp.PayloadStatus.Status)
-		}
-		payload, err := api.GetPayloadV1(*resp.PayloadID)
-		if err != nil {
-			t.Fatalf("can't get payload: %v", err)
-		}
 		execResp, err := api.NewPayloadV1(*payload)
 		if err != nil {
 			t.Fatalf("can't execute payload: %v", err)
@ -467,7 +459,7 @@ func TestFullAPI(t *testing.T) {
 		if execResp.Status != beacon.VALID {
 			t.Fatalf("invalid status: %v", execResp.Status)
 		}
-		fcState = beacon.ForkchoiceStateV1{
+		fcState := beacon.ForkchoiceStateV1{
 			HeadBlockHash:      payload.BlockHash,
 			SafeBlockHash:      payload.ParentHash,
 			FinalizedBlockHash: payload.ParentHash,
@ -531,11 +523,29 @@ func TestExchangeTransitionConfig(t *testing.T) {
 	}
 }

-func TestEmptyBlocks(t *testing.T) {
+/*
+TestNewPayloadOnInvalidChain sets up a valid chain and tries to feed blocks
+from an invalid chain to test if latestValidHash (LVH) works correctly.
+
+We set up the following chain where P1 ... Pn and P1'' are valid while
+P1' is invalid.
+We expect
+(1) The LVH to point to the current inserted payload if it was valid.
+(2) The LVH to point to the valid parent on an invalid payload (if the parent is available).
+(3) If the parent is unavailable, the LVH should not be set.
+
+CommonAncestor◄─▲── P1 ◄── P2  ◄─ P3  ◄─ ... ◄─ Pn
+				│
+				└── P1' ◄─ P2' ◄─ P3' ◄─ ... ◄─ Pn'
+				│
+				└── P1''
+*/
+func TestNewPayloadOnInvalidChain(t *testing.T) {
 	genesis, preMergeBlocks := generatePreMergeChain(10)
 	n, ethservice := startEthService(t, genesis, preMergeBlocks)
 	ethservice.Merger().ReachTTD()
 	defer n.Close()
+
 	var (
 		api    = NewConsensusAPI(ethservice)
 		parent = ethservice.BlockChain().CurrentBlock()
@ -604,3 +614,183 @@ func assembleBlock(api *ConsensusAPI, parentHash common.Hash, params *beacon.Pay
 	}
 	return beacon.BlockToExecutableData(block), nil
 }
+
+func TestEmptyBlocks(t *testing.T) {
+	genesis, preMergeBlocks := generatePreMergeChain(10)
+	n, ethservice := startEthService(t, genesis, preMergeBlocks)
+	ethservice.Merger().ReachTTD()
+	defer n.Close()
+
+	commonAncestor := ethservice.BlockChain().CurrentBlock()
+	api := NewConsensusAPI(ethservice)
+
+	// Setup 10 blocks on the canonical chain
+	setupBlocks(t, ethservice, 10, commonAncestor, func(parent *types.Block) {})
+
+	// (1) check LatestValidHash by sending a normal payload (P1'')
+	payload := getNewPayload(t, api, commonAncestor)
+
+	status, err := api.NewPayloadV1(*payload)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if status.Status != beacon.VALID {
+		t.Errorf("invalid status: expected VALID got: %v", status.Status)
+	}
+	if !bytes.Equal(status.LatestValidHash[:], payload.BlockHash[:]) {
+		t.Fatalf("invalid LVH: got %v want %v", status.LatestValidHash, payload.BlockHash)
+	}
+
+	// (2) Now send P1' which is invalid
+	payload = getNewPayload(t, api, commonAncestor)
+	payload.GasUsed += 1
+	payload = setBlockhash(payload)
+	// Now latestValidHash should be the common ancestor
+	status, err = api.NewPayloadV1(*payload)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if status.Status != beacon.INVALID {
+		t.Errorf("invalid status: expected INVALID got: %v", status.Status)
+	}
+	expected := commonAncestor.Hash()
+	if !bytes.Equal(status.LatestValidHash[:], expected[:]) {
+		t.Fatalf("invalid LVH: got %v want %v", status.LatestValidHash, expected)
+	}
+
+	// (3) Now send a payload with unknown parent
+	payload = getNewPayload(t, api, commonAncestor)
+	payload.ParentHash = common.Hash{1}
+	payload = setBlockhash(payload)
+	// Now latestValidHash should be the common ancestor
+	status, err = api.NewPayloadV1(*payload)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if status.Status != beacon.ACCEPTED {
+		t.Errorf("invalid status: expected ACCEPTED got: %v", status.Status)
+	}
+	if status.LatestValidHash != nil {
+		t.Fatalf("invalid LVH: got %v wanted nil", status.LatestValidHash)
+	}
+}
+
+func getNewPayload(t *testing.T, api *ConsensusAPI, parent *types.Block) *beacon.ExecutableDataV1 {
+	params := beacon.PayloadAttributesV1{
+		Timestamp:             parent.Time() + 1,
+		Random:                crypto.Keccak256Hash([]byte{byte(1)}),
+		SuggestedFeeRecipient: parent.Coinbase(),
+	}
+
+	payload, err := assembleBlock(api, parent.Hash(), &params)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return payload
+}
+
+// setBlockhash sets the blockhash of a modified ExecutableData.
+// Can be used to make modified payloads look valid.
+func setBlockhash(data *beacon.ExecutableDataV1) *beacon.ExecutableDataV1 {
+	txs, _ := decodeTransactions(data.Transactions)
+	number := big.NewInt(0)
+	number.SetUint64(data.Number)
+	header := &types.Header{
+		ParentHash:  data.ParentHash,
+		UncleHash:   types.EmptyUncleHash,
+		Coinbase:    data.FeeRecipient,
+		Root:        data.StateRoot,
+		TxHash:      types.DeriveSha(types.Transactions(txs), trie.NewStackTrie(nil)),
+		ReceiptHash: data.ReceiptsRoot,
+		Bloom:       types.BytesToBloom(data.LogsBloom),
+		Difficulty:  common.Big0,
+		Number:      number,
+		GasLimit:    data.GasLimit,
+		GasUsed:     data.GasUsed,
+		Time:        data.Timestamp,
+		BaseFee:     data.BaseFeePerGas,
+		Extra:       data.ExtraData,
+		MixDigest:   data.Random,
+	}
+	block := types.NewBlockWithHeader(header).WithBody(txs, nil /* uncles */)
+	data.BlockHash = block.Hash()
+	return data
+}
+
+func decodeTransactions(enc [][]byte) ([]*types.Transaction, error) {
+	var txs = make([]*types.Transaction, len(enc))
+	for i, encTx := range enc {
+		var tx types.Transaction
+		if err := tx.UnmarshalBinary(encTx); err != nil {
+			return nil, fmt.Errorf("invalid transaction %d: %v", i, err)
+		}
+		txs[i] = &tx
+	}
+	return txs, nil
+}
+
+func TestTrickRemoteBlockCache(t *testing.T) {
+	// Setup two nodes
+	genesis, preMergeBlocks := generatePreMergeChain(10)
+	nodeA, ethserviceA := startEthService(t, genesis, preMergeBlocks)
+	nodeB, ethserviceB := startEthService(t, genesis, preMergeBlocks)
+	ethserviceA.Merger().ReachTTD()
+	ethserviceB.Merger().ReachTTD()
+	defer nodeA.Close()
+	defer nodeB.Close()
+	for nodeB.Server().NodeInfo().Ports.Listener == 0 {
+		time.Sleep(250 * time.Millisecond)
+	}
+	nodeA.Server().AddPeer(nodeB.Server().Self())
+	nodeB.Server().AddPeer(nodeA.Server().Self())
+	apiA := NewConsensusAPI(ethserviceA)
+	apiB := NewConsensusAPI(ethserviceB)
+
+	commonAncestor := ethserviceA.BlockChain().CurrentBlock()
+
+	// Setup 10 blocks on the canonical chain
+	setupBlocks(t, ethserviceA, 10, commonAncestor, func(parent *types.Block) {})
+	commonAncestor = ethserviceA.BlockChain().CurrentBlock()
+
+	var invalidChain []*beacon.ExecutableDataV1
+	// create a valid payload (P1)
+	//payload1 := getNewPayload(t, apiA, commonAncestor)
+	//invalidChain = append(invalidChain, payload1)
+
+	// create an invalid payload2 (P2)
+	payload2 := getNewPayload(t, apiA, commonAncestor)
+	//payload2.ParentHash = payload1.BlockHash
+	payload2.GasUsed += 1
+	payload2 = setBlockhash(payload2)
+	invalidChain = append(invalidChain, payload2)
+
+	head := payload2
+	// create some valid payloads on top
+	for i := 0; i < 10; i++ {
+		payload := getNewPayload(t, apiA, commonAncestor)
+		payload.ParentHash = head.BlockHash
+		payload = setBlockhash(payload)
+		invalidChain = append(invalidChain, payload)
+		head = payload
+	}
+
+	// feed the payloads to node B
+	for _, payload := range invalidChain {
+		status, err := apiB.NewPayloadV1(*payload)
+		if err != nil {
+			panic(err)
+		}
+		if status.Status == beacon.INVALID {
+			panic("success")
+		}
+		// Now reorg to the head of the invalid chain
+		resp, err := apiB.ForkchoiceUpdatedV1(beacon.ForkchoiceStateV1{HeadBlockHash: payload.BlockHash, SafeBlockHash: payload.BlockHash, FinalizedBlockHash: payload.ParentHash}, nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if resp.PayloadStatus.Status == beacon.VALID {
+			t.Errorf("invalid status: expected INVALID got: %v", resp.PayloadStatus.Status)
+		}
+		time.Sleep(100 * time.Millisecond)
+	}
+}
--- a/les/catalyst/api.go
+++ b/les/catalyst/api.go
@ -161,7 +161,7 @@ func (api *ConsensusAPI) checkTerminalTotalDifficulty(head common.Hash) error {
 	}
 	td := api.les.BlockChain().GetTd(header.Hash(), header.Number.Uint64())
 	if td != nil && td.Cmp(api.les.BlockChain().Config().TerminalTotalDifficulty) < 0 {
-		return &beacon.InvalidTB
+		return errors.New("invalid ttd")
 	}
 	return nil
 }