beacon/engine, eth/catalyst, miner: EIP-4788 CL/EL protocol updates (#27872)

This PR makes EIP-4788 work in the engine API and miner. It also fixes some bugs related to 
EIP-4844 block processing and mining. Changes in detail:

- Header.BeaconRoot has been renamed to ParentBeaconRoot.
- The engine API now implements forkchoiceUpdatedV3
- newPayloadV3 method has been updated with the parentBeaconBlockRoot parameter
- beacon root is now applied to new blocks in miner
- For EIP-4844, block creation now updates the blobGasUsed field of the header

beacon/engine/errors.go

@@ -80,6 +80,7 @@ var (
 	InvalidPayloadAttributes = &EngineAPIError{code: -38003, msg: "Invalid payload attributes"}
 	TooLargeRequest          = &EngineAPIError{code: -38004, msg: "Too large request"}
 	InvalidParams            = &EngineAPIError{code: -32602, msg: "Invalid parameters"}
+	UnsupportedFork          = &EngineAPIError{code: -38005, msg: "Unsupported fork"}
 
 	STATUS_INVALID         = ForkChoiceResponse{PayloadStatus: PayloadStatusV1{Status: INVALID}, PayloadID: nil}
 	STATUS_SYNCING         = ForkChoiceResponse{PayloadStatus: PayloadStatusV1{Status: SYNCING}, PayloadID: nil}

beacon/engine/gen_blockparams.go

@@ -20,12 +20,14 @@ func (p PayloadAttributes) MarshalJSON() ([]byte, error) {
 		Random                common.Hash         `json:"prevRandao"            gencodec:"required"`
 		SuggestedFeeRecipient common.Address      `json:"suggestedFeeRecipient" gencodec:"required"`
 		Withdrawals           []*types.Withdrawal `json:"withdrawals"`
+		BeaconRoot            *common.Hash        `json:"parentBeaconBlockRoot"`
 	}
 	var enc PayloadAttributes
 	enc.Timestamp = hexutil.Uint64(p.Timestamp)
 	enc.Random = p.Random
 	enc.SuggestedFeeRecipient = p.SuggestedFeeRecipient
 	enc.Withdrawals = p.Withdrawals
+	enc.BeaconRoot = p.BeaconRoot
 	return json.Marshal(&enc)
 }
 
@@ -36,6 +38,7 @@ func (p *PayloadAttributes) UnmarshalJSON(input []byte) error {
 		Random                *common.Hash        `json:"prevRandao"            gencodec:"required"`
 		SuggestedFeeRecipient *common.Address     `json:"suggestedFeeRecipient" gencodec:"required"`
 		Withdrawals           []*types.Withdrawal `json:"withdrawals"`
+		BeaconRoot            *common.Hash        `json:"parentBeaconBlockRoot"`
 	}
 	var dec PayloadAttributes
 	if err := json.Unmarshal(input, &dec); err != nil {
@@ -56,5 +59,8 @@ func (p *PayloadAttributes) UnmarshalJSON(input []byte) error {
 	if dec.Withdrawals != nil {
 		p.Withdrawals = dec.Withdrawals
 	}
+	if dec.BeaconRoot != nil {
+		p.BeaconRoot = dec.BeaconRoot
+	}
 	return nil
 }

beacon/engine/types.go

@@ -35,6 +35,7 @@ type PayloadAttributes struct {
 	Random                common.Hash         `json:"prevRandao"            gencodec:"required"`
 	SuggestedFeeRecipient common.Address      `json:"suggestedFeeRecipient" gencodec:"required"`
 	Withdrawals           []*types.Withdrawal `json:"withdrawals"`
+	BeaconRoot            *common.Hash        `json:"parentBeaconBlockRoot"`
 }
 
 // JSON type overrides for PayloadAttributes.
@@ -171,7 +172,7 @@ func decodeTransactions(enc [][]byte) ([]*types.Transaction, error) {
 // and that the blockhash of the constructed block matches the parameters. Nil
 // Withdrawals value will propagate through the returned block. Empty
 // Withdrawals value must be passed via non-nil, length 0 value in params.
-func ExecutableDataToBlock(params ExecutableData, versionedHashes []common.Hash) (*types.Block, error) {
+func ExecutableDataToBlock(params ExecutableData, versionedHashes []common.Hash, beaconRoot *common.Hash) (*types.Block, error) {
 	txs, err := decodeTransactions(params.Transactions)
 	if err != nil {
 		return nil, err
@@ -225,7 +226,7 @@ func ExecutableDataToBlock(params ExecutableData, versionedHashes []common.Hash)
 		WithdrawalsHash:  withdrawalsRoot,
 		ExcessBlobGas:    params.ExcessBlobGas,
 		BlobGasUsed:      params.BlobGasUsed,
-		// TODO BeaconRoot
+		ParentBeaconRoot: beaconRoot,
 	}
 	block := types.NewBlockWithHeader(header).WithBody(txs, nil /* uncles */).WithWithdrawals(params.Withdrawals)
 	if block.Hash() != params.BlockHash {
@@ -255,7 +256,6 @@ func BlockToExecutableData(block *types.Block, fees *big.Int, sidecars []*types.
 		Withdrawals:   block.Withdrawals(),
 		BlobGasUsed:   block.BlobGasUsed(),
 		ExcessBlobGas: block.ExcessBlobGas(),
-		// TODO BeaconRoot
 	}
 	bundle := BlobsBundleV1{
 		Commitments: make([]hexutil.Bytes, 0),

consensus/beacon/consensus.go

@@ -277,11 +277,11 @@ func (beacon *Beacon) verifyHeader(chain consensus.ChainHeaderReader, header, pa
 			return fmt.Errorf("invalid excessBlobGas: have %d, expected nil", header.ExcessBlobGas)
 		case header.BlobGasUsed != nil:
 			return fmt.Errorf("invalid blobGasUsed: have %d, expected nil", header.BlobGasUsed)
-		case header.BeaconRoot != nil:
+		case header.ParentBeaconRoot != nil:
-			return fmt.Errorf("invalid beaconRoot, have %#x, expected nil", header.BeaconRoot)
+			return fmt.Errorf("invalid parentBeaconRoot, have %#x, expected nil", header.ParentBeaconRoot)
 		}
 	} else {
-		if header.BeaconRoot == nil {
+		if header.ParentBeaconRoot == nil {
 			return errors.New("header is missing beaconRoot")
 		}
 		if err := eip4844.VerifyEIP4844Header(parent, header); err != nil {

core/chain_makers.go

@@ -411,7 +411,7 @@ func makeHeader(chain consensus.ChainReader, parent *types.Block, state *state.S
 		excessBlobGas := eip4844.CalcExcessBlobGas(parentExcessBlobGas, parentBlobGasUsed)
 		header.ExcessBlobGas = &excessBlobGas
 		header.BlobGasUsed = new(uint64)
-		header.BeaconRoot = new(common.Hash)
+		header.ParentBeaconRoot = new(common.Hash)
 	}
 	return header
 }

core/genesis.go

@@ -483,6 +483,11 @@ func (g *Genesis) ToBlock() *types.Block {
 			withdrawals = make([]*types.Withdrawal, 0)
 		}
 		if conf.IsCancun(num, g.Timestamp) {
+			// EIP-4788: The parentBeaconBlockRoot of the genesis block is always
+			// the zero hash. This is because the genesis block does not have a parent
+			// by definition.
+			head.ParentBeaconRoot = new(common.Hash)
+			// EIP-4844 fields
 			head.ExcessBlobGas = g.ExcessBlobGas
 			head.BlobGasUsed = g.BlobGasUsed
 			if head.ExcessBlobGas == nil {
@@ -491,9 +496,6 @@ func (g *Genesis) ToBlock() *types.Block {
 			if head.BlobGasUsed == nil {
 				head.BlobGasUsed = new(uint64)
 			}
-			if head.BeaconRoot == nil {
-				head.BeaconRoot = new(common.Hash)
-			}
 		}
 	}
 	return types.NewBlock(head, nil, nil, nil, trie.NewStackTrie(nil)).WithWithdrawals(withdrawals)

core/state_processor.go

@@ -135,6 +135,9 @@ func applyTransaction(msg *Message, config *params.ChainConfig, gp *GasPool, sta
 	receipt.TxHash = tx.Hash()
 	receipt.GasUsed = result.UsedGas
 
+	receipt.BlobGasUsed = uint64(len(tx.BlobHashes()) * params.BlobTxBlobGasPerBlob)
+	receipt.BlobGasPrice = tx.BlobGasFeeCap()
+
 	// If the transaction created a contract, store the creation address in the receipt.
 	if msg.To == nil {
 		receipt.ContractAddress = crypto.CreateAddress(evm.TxContext.Origin, tx.Nonce())

core/state_processor_test.go

@@ -412,7 +412,7 @@ func GenerateBadBlock(parent *types.Block, engine consensus.Engine, txs types.Tr
 		header.BlobGasUsed = &used
 
 		beaconRoot := common.HexToHash("0xbeac00")
-		header.BeaconRoot = &beaconRoot
+		header.ParentBeaconRoot = &beaconRoot
 	}
 	// Assemble and return the final block for sealing
 	if config.IsShanghai(header.Number, header.Time) {

core/types/block.go

@@ -91,8 +91,8 @@ type Header struct {
 	// ExcessBlobGas was added by EIP-4844 and is ignored in legacy headers.
 	ExcessBlobGas *uint64 `json:"excessBlobGas" rlp:"optional"`
 
-	// BeaconRoot was added by EIP-4788 and is ignored in legacy headers.
+	// ParentBeaconRoot was added by EIP-4788 and is ignored in legacy headers.
-	BeaconRoot *common.Hash `json:"parentBeaconBlockRoot" rlp:"optional"`
+	ParentBeaconRoot *common.Hash `json:"parentBeaconBlockRoot" rlp:"optional"`
 }
 
 // field type overrides for gencodec
@@ -300,9 +300,9 @@ func CopyHeader(h *Header) *Header {
 		cpy.BlobGasUsed = new(uint64)
 		*cpy.BlobGasUsed = *h.BlobGasUsed
 	}
-	if h.BeaconRoot != nil {
+	if h.ParentBeaconRoot != nil {
-		cpy.BeaconRoot = new(common.Hash)
+		cpy.ParentBeaconRoot = new(common.Hash)
-		*cpy.BeaconRoot = *h.BeaconRoot
+		*cpy.ParentBeaconRoot = *h.ParentBeaconRoot
 	}
 	return &cpy
 }
@@ -383,7 +383,7 @@ func (b *Block) BaseFee() *big.Int {
 	return new(big.Int).Set(b.header.BaseFee)
 }
 
-func (b *Block) BeaconRoot() *common.Hash { return b.header.BeaconRoot }
+func (b *Block) BeaconRoot() *common.Hash { return b.header.ParentBeaconRoot }
 
 func (b *Block) ExcessBlobGas() *uint64 {
 	var excessBlobGas *uint64

core/types/gen_header_json.go

@@ -35,7 +35,7 @@ func (h Header) MarshalJSON() ([]byte, error) {
 		WithdrawalsHash  *common.Hash    `json:"withdrawalsRoot" rlp:"optional"`
 		BlobGasUsed      *hexutil.Uint64 `json:"blobGasUsed" rlp:"optional"`
 		ExcessBlobGas    *hexutil.Uint64 `json:"excessBlobGas" rlp:"optional"`
-		BeaconRoot      *common.Hash    `json:"parentBeaconBlockRoot" rlp:"optional"`
+		ParentBeaconRoot *common.Hash    `json:"parentBeaconBlockRoot" rlp:"optional"`
 		Hash             common.Hash     `json:"hash"`
 	}
 	var enc Header
@@ -58,7 +58,7 @@ func (h Header) MarshalJSON() ([]byte, error) {
 	enc.WithdrawalsHash = h.WithdrawalsHash
 	enc.BlobGasUsed = (*hexutil.Uint64)(h.BlobGasUsed)
 	enc.ExcessBlobGas = (*hexutil.Uint64)(h.ExcessBlobGas)
-	enc.BeaconRoot = h.BeaconRoot
+	enc.ParentBeaconRoot = h.ParentBeaconRoot
 	enc.Hash = h.Hash()
 	return json.Marshal(&enc)
 }
@@ -85,7 +85,7 @@ func (h *Header) UnmarshalJSON(input []byte) error {
 		WithdrawalsHash  *common.Hash    `json:"withdrawalsRoot" rlp:"optional"`
 		BlobGasUsed      *hexutil.Uint64 `json:"blobGasUsed" rlp:"optional"`
 		ExcessBlobGas    *hexutil.Uint64 `json:"excessBlobGas" rlp:"optional"`
-		BeaconRoot      *common.Hash    `json:"parentBeaconBlockRoot" rlp:"optional"`
+		ParentBeaconRoot *common.Hash    `json:"parentBeaconBlockRoot" rlp:"optional"`
 	}
 	var dec Header
 	if err := json.Unmarshal(input, &dec); err != nil {
@@ -160,8 +160,8 @@ func (h *Header) UnmarshalJSON(input []byte) error {
 	if dec.ExcessBlobGas != nil {
 		h.ExcessBlobGas = (*uint64)(dec.ExcessBlobGas)
 	}
-	if dec.BeaconRoot != nil {
+	if dec.ParentBeaconRoot != nil {
-		h.BeaconRoot = dec.BeaconRoot
+		h.ParentBeaconRoot = dec.ParentBeaconRoot
 	}
 	return nil
 }

core/types/gen_header_rlp.go

@@ -44,7 +44,7 @@ func (obj *Header) EncodeRLP(_w io.Writer) error {
 	_tmp2 := obj.WithdrawalsHash != nil
 	_tmp3 := obj.BlobGasUsed != nil
 	_tmp4 := obj.ExcessBlobGas != nil
-	_tmp5 := obj.BeaconRoot != nil
+	_tmp5 := obj.ParentBeaconRoot != nil
 	if _tmp1 || _tmp2 || _tmp3 || _tmp4 || _tmp5 {
 		if obj.BaseFee == nil {
 			w.Write(rlp.EmptyString)
@@ -77,10 +77,10 @@ func (obj *Header) EncodeRLP(_w io.Writer) error {
 		}
 	}
 	if _tmp5 {
-		if obj.BeaconRoot == nil {
+		if obj.ParentBeaconRoot == nil {
 			w.Write([]byte{0x80})
 		} else {
-			w.WriteBytes(obj.BeaconRoot[:])
+			w.WriteBytes(obj.ParentBeaconRoot[:])
 		}
 	}
 	w.ListEnd(_tmp0)

eth/catalyst/api.go

@@ -78,6 +78,7 @@ const (
 var caps = []string{
 	"engine_forkchoiceUpdatedV1",
 	"engine_forkchoiceUpdatedV2",
+	"engine_forkchoiceUpdatedV3",
 	"engine_exchangeTransitionConfigurationV1",
 	"engine_getPayloadV1",
 	"engine_getPayloadV2",
@@ -192,17 +193,36 @@ func (api *ConsensusAPI) ForkchoiceUpdatedV2(update engine.ForkchoiceStateV1, pa
 	return api.forkchoiceUpdated(update, payloadAttributes)
 }
 
+// ForkchoiceUpdatedV3 is equivalent to V2 with the addition of parent beacon block root in the payload attributes.
+func (api *ConsensusAPI) ForkchoiceUpdatedV3(update engine.ForkchoiceStateV1, payloadAttributes *engine.PayloadAttributes) (engine.ForkChoiceResponse, error) {
+	if payloadAttributes != nil {
+		if err := api.verifyPayloadAttributes(payloadAttributes); err != nil {
+			return engine.STATUS_INVALID, engine.InvalidParams.With(err)
+		}
+	}
+	return api.forkchoiceUpdated(update, payloadAttributes)
+}
+
 func (api *ConsensusAPI) verifyPayloadAttributes(attr *engine.PayloadAttributes) error {
-	if !api.eth.BlockChain().Config().IsShanghai(api.eth.BlockChain().Config().LondonBlock, attr.Timestamp) {
+	c := api.eth.BlockChain().Config()
-		// Reject payload attributes with withdrawals before shanghai
+
-		if attr.Withdrawals != nil {
+	// Verify withdrawals attribute for Shanghai.
-			return errors.New("withdrawals before shanghai")
+	if err := checkAttribute(c.IsShanghai, attr.Withdrawals != nil, attr.Timestamp); err != nil {
+		return fmt.Errorf("invalid withdrawals: %w", err)
 	}
-	} else {
+	// Verify beacon root attribute for Cancun.
-		// Reject payload attributes with nil withdrawals after shanghai
+	if err := checkAttribute(c.IsCancun, attr.BeaconRoot != nil, attr.Timestamp); err != nil {
-		if attr.Withdrawals == nil {
+		return fmt.Errorf("invalid parent beacon block root: %w", err)
-			return errors.New("missing withdrawals list")
 	}
+	return nil
+}
+
+func checkAttribute(active func(*big.Int, uint64) bool, exists bool, time uint64) error {
+	if active(common.Big0, time) && !exists {
+		return errors.New("fork active, missing expected attribute")
+	}
+	if !active(common.Big0, time) && exists {
+		return errors.New("fork inactive, unexpected attribute set")
 	}
 	return nil
 }
@@ -350,6 +370,7 @@ func (api *ConsensusAPI) forkchoiceUpdated(update engine.ForkchoiceStateV1, payl
 			FeeRecipient: payloadAttributes.SuggestedFeeRecipient,
 			Random:       payloadAttributes.Random,
 			Withdrawals:  payloadAttributes.Withdrawals,
+			BeaconRoot:   payloadAttributes.BeaconRoot,
 		}
 		id := args.Id()
 		// If we already are busy generating this work, then we do not need
@@ -431,7 +452,7 @@ func (api *ConsensusAPI) NewPayloadV1(params engine.ExecutableData) (engine.Payl
 	if params.Withdrawals != nil {
 		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.InvalidParams.With(errors.New("withdrawals not supported in V1"))
 	}
-	return api.newPayload(params, nil)
+	return api.newPayload(params, nil, nil)
 }
 
 // NewPayloadV2 creates an Eth1 block, inserts it in the chain, and returns the status of the chain.
@@ -446,26 +467,32 @@ func (api *ConsensusAPI) NewPayloadV2(params engine.ExecutableData) (engine.Payl
 	if api.eth.BlockChain().Config().IsCancun(new(big.Int).SetUint64(params.Number), params.Timestamp) {
 		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.InvalidParams.With(errors.New("newPayloadV2 called post-cancun"))
 	}
-	return api.newPayload(params, nil)
+	return api.newPayload(params, nil, nil)
 }
 
 // NewPayloadV3 creates an Eth1 block, inserts it in the chain, and returns the status of the chain.
-func (api *ConsensusAPI) NewPayloadV3(params engine.ExecutableData, versionedHashes *[]common.Hash) (engine.PayloadStatusV1, error) {
+func (api *ConsensusAPI) NewPayloadV3(params engine.ExecutableData, versionedHashes []common.Hash, beaconRoot *common.Hash) (engine.PayloadStatusV1, error) {
-	if !api.eth.BlockChain().Config().IsCancun(new(big.Int).SetUint64(params.Number), params.Timestamp) {
-		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.InvalidParams.With(errors.New("newPayloadV3 called pre-cancun"))
-	}
-
 	if params.ExcessBlobGas == nil {
 		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.InvalidParams.With(errors.New("nil excessBlobGas post-cancun"))
 	}
-	var hashes []common.Hash
+	if params.BlobGasUsed == nil {
-	if versionedHashes != nil {
+		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.InvalidParams.With(errors.New("nil params.BlobGasUsed post-cancun"))
-		hashes = *versionedHashes
 	}
-	return api.newPayload(params, hashes)
+	if versionedHashes == nil {
+		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.InvalidParams.With(errors.New("nil versionedHashes post-cancun"))
+	}
+	if beaconRoot == nil {
+		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.InvalidParams.With(errors.New("nil parentBeaconBlockRoot post-cancun"))
+	}
+
+	if !api.eth.BlockChain().Config().IsCancun(new(big.Int).SetUint64(params.Number), params.Timestamp) {
+		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.UnsupportedFork.With(errors.New("newPayloadV3 called pre-cancun"))
+	}
+
+	return api.newPayload(params, versionedHashes, beaconRoot)
 }
 
-func (api *ConsensusAPI) newPayload(params engine.ExecutableData, versionedHashes []common.Hash) (engine.PayloadStatusV1, error) {
+func (api *ConsensusAPI) newPayload(params engine.ExecutableData, versionedHashes []common.Hash, beaconRoot *common.Hash) (engine.PayloadStatusV1, error) {
 	// The locking here is, strictly, not required. Without these locks, this can happen:
 	//
 	// 1. NewPayload( execdata-N ) is invoked from the CL. It goes all the way down to
@@ -483,7 +510,7 @@ func (api *ConsensusAPI) newPayload(params engine.ExecutableData, versionedHashe
 	defer api.newPayloadLock.Unlock()
 
 	log.Trace("Engine API request received", "method", "NewPayload", "number", params.Number, "hash", params.BlockHash)
-	block, err := engine.ExecutableDataToBlock(params, versionedHashes)
+	block, err := engine.ExecutableDataToBlock(params, versionedHashes, beaconRoot)
 	if err != nil {
 		log.Warn("Invalid NewPayload params", "params", params, "error", err)
 		return engine.PayloadStatusV1{Status: engine.INVALID}, nil

eth/catalyst/api_test.go

@@ -41,12 +41,14 @@ import (
 	"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/miner"
 	"github.com/ethereum/go-ethereum/node"
 	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/ethereum/go-ethereum/trie"
+	"github.com/mattn/go-colorable"
 )
 
 var (
@@ -69,7 +71,10 @@ func generateMergeChain(n int, merged bool) (*core.Genesis, []*types.Block) {
 	}
 	genesis := &core.Genesis{
 		Config: &config,
-		Alloc:      core.GenesisAlloc{testAddr: {Balance: testBalance}},
+		Alloc: core.GenesisAlloc{
+			testAddr:                         {Balance: testBalance},
+			params.BeaconRootsStorageAddress: {Balance: common.Big0, Code: common.Hex2Bytes("3373fffffffffffffffffffffffffffffffffffffffe14604457602036146024575f5ffd5b620180005f350680545f35146037575f5ffd5b6201800001545f5260205ff35b6201800042064281555f359062018000015500")},
+		},
 		ExtraData:  []byte("test genesis"),
 		Timestamp:  9000,
 		BaseFee:    big.NewInt(params.InitialBaseFee),
@@ -204,6 +209,7 @@ func TestEth2PrepareAndGetPayload(t *testing.T) {
 		Timestamp:    blockParams.Timestamp,
 		FeeRecipient: blockParams.SuggestedFeeRecipient,
 		Random:       blockParams.Random,
+		BeaconRoot:   blockParams.BeaconRoot,
 	}).Id()
 	execData, err := api.GetPayloadV1(payloadID)
 	if err != nil {
@@ -314,7 +320,7 @@ func TestEth2NewBlock(t *testing.T) {
 		if err != nil {
 			t.Fatalf("Failed to create the executable data %v", err)
 		}
-		block, err := engine.ExecutableDataToBlock(*execData, nil)
+		block, err := engine.ExecutableDataToBlock(*execData, nil, nil)
 		if err != nil {
 			t.Fatalf("Failed to convert executable data to block %v", err)
 		}
@@ -356,7 +362,7 @@ func TestEth2NewBlock(t *testing.T) {
 		if err != nil {
 			t.Fatalf("Failed to create the executable data %v", err)
 		}
-		block, err := engine.ExecutableDataToBlock(*execData, nil)
+		block, err := engine.ExecutableDataToBlock(*execData, nil, nil)
 		if err != nil {
 			t.Fatalf("Failed to convert executable data to block %v", err)
 		}
@@ -667,6 +673,7 @@ func assembleBlock(api *ConsensusAPI, parentHash common.Hash, params *engine.Pay
 		FeeRecipient: params.SuggestedFeeRecipient,
 		Random:       params.Random,
 		Withdrawals:  params.Withdrawals,
+		BeaconRoot:   params.BeaconRoot,
 	}
 	payload, err := api.eth.Miner().BuildPayload(args)
 	if err != nil {
@@ -988,7 +995,7 @@ func TestSimultaneousNewBlock(t *testing.T) {
 				t.Fatal(testErr)
 			}
 		}
-		block, err := engine.ExecutableDataToBlock(*execData, nil)
+		block, err := engine.ExecutableDataToBlock(*execData, nil, nil)
 		if err != nil {
 			t.Fatalf("Failed to convert executable data to block %v", err)
 		}
@@ -1068,6 +1075,7 @@ func TestWithdrawals(t *testing.T) {
 		FeeRecipient: blockParams.SuggestedFeeRecipient,
 		Random:       blockParams.Random,
 		Withdrawals:  blockParams.Withdrawals,
+		BeaconRoot:   blockParams.BeaconRoot,
 	}).Id()
 	execData, err := api.GetPayloadV2(payloadID)
 	if err != nil {
@@ -1115,6 +1123,7 @@ func TestWithdrawals(t *testing.T) {
 		FeeRecipient: blockParams.SuggestedFeeRecipient,
 		Random:       blockParams.Random,
 		Withdrawals:  blockParams.Withdrawals,
+		BeaconRoot:   blockParams.BeaconRoot,
 	}).Id()
 	execData, err = api.GetPayloadV2(payloadID)
 	if err != nil {
@@ -1245,6 +1254,7 @@ func TestNilWithdrawals(t *testing.T) {
 			Timestamp:    test.blockParams.Timestamp,
 			FeeRecipient: test.blockParams.SuggestedFeeRecipient,
 			Random:       test.blockParams.Random,
+			BeaconRoot:   test.blockParams.BeaconRoot,
 		}).Id()
 		execData, err := api.GetPayloadV2(payloadID)
 		if err != nil {
@@ -1544,8 +1554,91 @@ func TestBlockToPayloadWithBlobs(t *testing.T) {
 	if got := len(envelope.BlobsBundle.Blobs); got != want {
 		t.Fatalf("invalid number of blobs: got %v, want %v", got, want)
 	}
-	_, err := engine.ExecutableDataToBlock(*envelope.ExecutionPayload, make([]common.Hash, 1))
+	_, err := engine.ExecutableDataToBlock(*envelope.ExecutionPayload, make([]common.Hash, 1), nil)
 	if err != nil {
 		t.Error(err)
 	}
 }
+
+// This checks that beaconRoot is applied to the state from the engine API.
+func TestParentBeaconBlockRoot(t *testing.T) {
+	log.Root().SetHandler(log.LvlFilterHandler(log.LvlTrace, log.StreamHandler(colorable.NewColorableStderr(), log.TerminalFormat(true))))
+
+	genesis, blocks := generateMergeChain(10, true)
+
+	// Set cancun time to last block + 5 seconds
+	time := blocks[len(blocks)-1].Time() + 5
+	genesis.Config.ShanghaiTime = &time
+	genesis.Config.CancunTime = &time
+
+	n, ethservice := startEthService(t, genesis, blocks)
+	ethservice.Merger().ReachTTD()
+	defer n.Close()
+
+	api := NewConsensusAPI(ethservice)
+
+	// 11: Build Shanghai block with no withdrawals.
+	parent := ethservice.BlockChain().CurrentHeader()
+	blockParams := engine.PayloadAttributes{
+		Timestamp:   parent.Time + 5,
+		Withdrawals: make([]*types.Withdrawal, 0),
+		BeaconRoot:  &common.Hash{42},
+	}
+	fcState := engine.ForkchoiceStateV1{
+		HeadBlockHash: parent.Hash(),
+	}
+	resp, err := api.ForkchoiceUpdatedV2(fcState, &blockParams)
+	if err != nil {
+		t.Fatalf("error preparing payload, err=%v", err.(*engine.EngineAPIError).ErrorData())
+	}
+	if resp.PayloadStatus.Status != engine.VALID {
+		t.Fatalf("unexpected status (got: %s, want: %s)", resp.PayloadStatus.Status, engine.VALID)
+	}
+
+	// 11: verify state root is the same as parent
+	payloadID := (&miner.BuildPayloadArgs{
+		Parent:       fcState.HeadBlockHash,
+		Timestamp:    blockParams.Timestamp,
+		FeeRecipient: blockParams.SuggestedFeeRecipient,
+		Random:       blockParams.Random,
+		Withdrawals:  blockParams.Withdrawals,
+		BeaconRoot:   blockParams.BeaconRoot,
+	}).Id()
+	execData, err := api.GetPayloadV3(payloadID)
+	if err != nil {
+		t.Fatalf("error getting payload, err=%v", err)
+	}
+
+	// 11: verify locally built block
+	if status, err := api.NewPayloadV3(*execData.ExecutionPayload, []common.Hash{}, &common.Hash{42}); err != nil {
+		t.Fatalf("error validating payload: %v", err)
+	} else if status.Status != engine.VALID {
+		t.Fatalf("invalid payload")
+	}
+
+	fcState.HeadBlockHash = execData.ExecutionPayload.BlockHash
+	resp, err = api.ForkchoiceUpdatedV3(fcState, nil)
+	if err != nil {
+		t.Fatalf("error preparing payload, err=%v", err.(*engine.EngineAPIError).ErrorData())
+	}
+	if resp.PayloadStatus.Status != engine.VALID {
+		t.Fatalf("unexpected status (got: %s, want: %s)", resp.PayloadStatus.Status, engine.VALID)
+	}
+
+	// 11: verify beacon root was processed.
+	db, _, err := ethservice.APIBackend.StateAndHeaderByNumber(context.Background(), rpc.BlockNumber(execData.ExecutionPayload.Number))
+	if err != nil {
+		t.Fatalf("unable to load db: %v", err)
+	}
+	var (
+		timeIdx = common.BigToHash(big.NewInt(int64(execData.ExecutionPayload.Timestamp % 98304)))
+		rootIdx = common.BigToHash(big.NewInt(int64((execData.ExecutionPayload.Timestamp % 98304) + 98304)))
+	)
+
+	if num := db.GetState(params.BeaconRootsStorageAddress, timeIdx); num != timeIdx {
+		t.Fatalf("incorrect number stored: want %s, got %s", timeIdx, num)
+	}
+	if root := db.GetState(params.BeaconRootsStorageAddress, rootIdx); root != *blockParams.BeaconRoot {
+		t.Fatalf("incorrect root stored: want %s, got %s", *blockParams.BeaconRoot, root)
+	}
+}

internal/ethapi/api.go

@@ -1345,6 +1345,9 @@ func RPCMarshalHeader(head *types.Header) map[string]interface{} {
 	if head.ExcessBlobGas != nil {
 		result["excessBlobGas"] = hexutil.Uint64(*head.ExcessBlobGas)
 	}
+	if head.ParentBeaconRoot != nil {
+		result["parentBeaconBlockRoot"] = head.ParentBeaconRoot
+	}
 	return result
 }
 

miner/payload_building.go

@@ -40,6 +40,7 @@ type BuildPayloadArgs struct {
 	FeeRecipient common.Address    // The provided recipient address for collecting transaction fee
 	Random       common.Hash       // The provided randomness value
 	Withdrawals  types.Withdrawals // The provided withdrawals
+	BeaconRoot   *common.Hash      // The provided beaconRoot (Cancun)
 }
 
 // Id computes an 8-byte identifier by hashing the components of the payload arguments.
@@ -51,6 +52,9 @@ func (args *BuildPayloadArgs) Id() engine.PayloadID {
 	hasher.Write(args.Random[:])
 	hasher.Write(args.FeeRecipient[:])
 	rlp.Encode(hasher, args.Withdrawals)
+	if args.BeaconRoot != nil {
+		hasher.Write(args.BeaconRoot[:])
+	}
 	var out engine.PayloadID
 	copy(out[:], hasher.Sum(nil)[:8])
 	return out
@@ -182,6 +186,7 @@ func (w *worker) buildPayload(args *BuildPayloadArgs) (*Payload, error) {
 		coinbase:    args.FeeRecipient,
 		random:      args.Random,
 		withdrawals: args.Withdrawals,
+		beaconRoot:  args.BeaconRoot,
 		noTxs:       true,
 	}
 	empty := w.getSealingBlock(emptyParams)
@@ -212,6 +217,7 @@ func (w *worker) buildPayload(args *BuildPayloadArgs) (*Payload, error) {
 			coinbase:    args.FeeRecipient,
 			random:      args.Random,
 			withdrawals: args.Withdrawals,
+			beaconRoot:  args.BeaconRoot,
 			noTxs:       false,
 		}
 

miner/worker.go

@@ -32,6 +32,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/txpool"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/params"
@@ -738,36 +739,58 @@ func (w *worker) updateSnapshot(env *environment) {
 }
 
 func (w *worker) commitTransaction(env *environment, tx *types.Transaction) ([]*types.Log, error) {
-	var (
+	if tx.Type() == types.BlobTxType {
-		snap = env.state.Snapshot()
+		return w.commitBlobTransaction(env, tx)
-		gp   = env.gasPool.Gas()
+	}
-	)
 
+	receipt, err := w.applyTransaction(env, tx)
+	if err != nil {
+		return nil, err
+	}
+	env.txs = append(env.txs, tx)
+	env.receipts = append(env.receipts, receipt)
+	return receipt.Logs, nil
+}
+
+func (w *worker) commitBlobTransaction(env *environment, tx *types.Transaction) ([]*types.Log, error) {
+	sc := tx.BlobTxSidecar()
+	if sc == nil {
+		panic("blob transaction without blobs in miner")
+	}
 	// Checking against blob gas limit: It's kind of ugly to perform this check here, but there
 	// isn't really a better place right now. The blob gas limit is checked at block validation time
 	// and not during execution. This means core.ApplyTransaction will not return an error if the
 	// tx has too many blobs. So we have to explicitly check it here.
-	if (env.blobs+len(tx.BlobHashes()))*params.BlobTxBlobGasPerBlob > params.MaxBlobGasPerBlock {
+	if (env.blobs+len(sc.Blobs))*params.BlobTxBlobGasPerBlob > params.MaxBlobGasPerBlock {
 		return nil, errors.New("max data blobs reached")
 	}
 
-	receipt, err := core.ApplyTransaction(w.chainConfig, w.chain, &env.coinbase, env.gasPool, env.state, env.header, tx, &env.header.GasUsed, *w.chain.GetVMConfig())
+	receipt, err := w.applyTransaction(env, tx)
 	if err != nil {
-		env.state.RevertToSnapshot(snap)
-		env.gasPool.SetGas(gp)
 		return nil, err
 	}
 	env.txs = append(env.txs, tx.WithoutBlobTxSidecar())
 	env.receipts = append(env.receipts, receipt)
-
-	if sc := tx.BlobTxSidecar(); sc != nil {
 	env.sidecars = append(env.sidecars, sc)
 	env.blobs += len(sc.Blobs)
-	}
+	*env.header.BlobGasUsed += receipt.BlobGasUsed
-
 	return receipt.Logs, nil
 }
 
+// applyTransaction runs the transaction. If execution fails, state and gas pool are reverted.
+func (w *worker) applyTransaction(env *environment, tx *types.Transaction) (*types.Receipt, error) {
+	var (
+		snap = env.state.Snapshot()
+		gp   = env.gasPool.Gas()
+	)
+	receipt, err := core.ApplyTransaction(w.chainConfig, w.chain, &env.coinbase, env.gasPool, env.state, env.header, tx, &env.header.GasUsed, *w.chain.GetVMConfig())
+	if err != nil {
+		env.state.RevertToSnapshot(snap)
+		env.gasPool.SetGas(gp)
+	}
+	return receipt, err
+}
+
 func (w *worker) commitTransactions(env *environment, txs *transactionsByPriceAndNonce, interrupt *atomic.Int32) error {
 	gasLimit := env.header.GasLimit
 	if env.gasPool == nil {
@@ -860,6 +883,7 @@ type generateParams struct {
 	coinbase    common.Address    // The fee recipient address for including transaction
 	random      common.Hash       // The randomness generated by beacon chain, empty before the merge
 	withdrawals types.Withdrawals // List of withdrawals to include in block.
+	beaconRoot  *common.Hash      // The beacon root (cancun field).
 	noTxs       bool              // Flag whether an empty block without any transaction is expected
 }
 
@@ -912,6 +936,7 @@ func (w *worker) prepareWork(genParams *generateParams) (*environment, error) {
 			header.GasLimit = core.CalcGasLimit(parentGasLimit, w.config.GasCeil)
 		}
 	}
+	// Apply EIP-4844, EIP-4788.
 	if w.chainConfig.IsCancun(header.Number, header.Time) {
 		var excessBlobGas uint64
 		if w.chainConfig.IsCancun(parent.Number, parent.Time) {
@@ -920,7 +945,9 @@ func (w *worker) prepareWork(genParams *generateParams) (*environment, error) {
 			// For the first post-fork block, both parent.data_gas_used and parent.excess_data_gas are evaluated as 0
 			excessBlobGas = eip4844.CalcExcessBlobGas(0, 0)
 		}
+		header.BlobGasUsed = new(uint64)
 		header.ExcessBlobGas = &excessBlobGas
+		header.ParentBeaconRoot = genParams.beaconRoot
 	}
 	// Run the consensus preparation with the default or customized consensus engine.
 	if err := w.engine.Prepare(w.chain, header); err != nil {
@@ -935,6 +962,11 @@ func (w *worker) prepareWork(genParams *generateParams) (*environment, error) {
 		log.Error("Failed to create sealing context", "err", err)
 		return nil, err
 	}
+	if header.ParentBeaconRoot != nil {
+		context := core.NewEVMBlockContext(header, w.chain, nil)
+		vmenv := vm.NewEVM(context, vm.TxContext{}, env.state, w.chainConfig, vm.Config{})
+		core.ProcessBeaconBlockRoot(*header.ParentBeaconRoot, vmenv, env.state)
+	}
 	return env, nil
 }
 

miner/worker_test.go

@@ -458,6 +458,7 @@ func testGetSealingWork(t *testing.T, chainConfig *params.ChainConfig, engine co
 			coinbase:    c.coinbase,
 			random:      c.random,
 			withdrawals: nil,
+			beaconRoot:  nil,
 			noTxs:       false,
 			forceTime:   true,
 		})
@@ -482,6 +483,7 @@ func testGetSealingWork(t *testing.T, chainConfig *params.ChainConfig, engine co
 			coinbase:    c.coinbase,
 			random:      c.random,
 			withdrawals: nil,
+			beaconRoot:  nil,
 			noTxs:       false,
 			forceTime:   true,
 		})