diff --git a/accounts/abi/bind/backends/simulated.go b/accounts/abi/bind/backends/simulated.go
index 008c71feaa7a..dc7405ed1905 100644
--- a/accounts/abi/bind/backends/simulated.go
+++ b/accounts/abi/bind/backends/simulated.go
@@ -95,7 +95,10 @@ func NewSimulatedBackendWithDatabase(database ethdb.Database, alloc core.Genesis
 	backend.filterSystem = filters.NewFilterSystem(filterBackend, filters.Config{})
 	backend.events = filters.NewEventSystem(backend.filterSystem, false)
 
-	backend.rollback(blockchain.CurrentBlock())
+	header := backend.blockchain.CurrentBlock()
+	block := backend.blockchain.GetBlock(header.Hash(), header.Number.Uint64())
+
+	backend.rollback(block)
 	return backend
 }
 
@@ -135,7 +138,10 @@ func (b *SimulatedBackend) Rollback() {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
-	b.rollback(b.blockchain.CurrentBlock())
+	header := b.blockchain.CurrentBlock()
+	block := b.blockchain.GetBlock(header.Hash(), header.Number.Uint64())
+
+	b.rollback(block)
 }
 
 func (b *SimulatedBackend) rollback(parent *types.Block) {
@@ -174,7 +180,7 @@ func (b *SimulatedBackend) Fork(ctx context.Context, parent common.Hash) error {
 
 // stateByBlockNumber retrieves a state by a given blocknumber.
 func (b *SimulatedBackend) stateByBlockNumber(ctx context.Context, blockNumber *big.Int) (*state.StateDB, error) {
-	if blockNumber == nil || blockNumber.Cmp(b.blockchain.CurrentBlock().Number()) == 0 {
+	if blockNumber == nil || blockNumber.Cmp(b.blockchain.CurrentBlock().Number) == 0 {
 		return b.blockchain.State()
 	}
 	block, err := b.blockByNumber(ctx, blockNumber)
@@ -303,7 +309,7 @@ func (b *SimulatedBackend) BlockByNumber(ctx context.Context, number *big.Int) (
 // (associated with its hash) if found without Lock.
 func (b *SimulatedBackend) blockByNumber(ctx context.Context, number *big.Int) (*types.Block, error) {
 	if number == nil || number.Cmp(b.pendingBlock.Number()) == 0 {
-		return b.blockchain.CurrentBlock(), nil
+		return b.blockByHash(ctx, b.blockchain.CurrentBlock().Hash())
 	}
 
 	block := b.blockchain.GetBlockByNumber(uint64(number.Int64()))
@@ -431,7 +437,7 @@ func (b *SimulatedBackend) CallContract(ctx context.Context, call ethereum.CallM
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
-	if blockNumber != nil && blockNumber.Cmp(b.blockchain.CurrentBlock().Number()) != 0 {
+	if blockNumber != nil && blockNumber.Cmp(b.blockchain.CurrentBlock().Number) != 0 {
 		return nil, errBlockNumberUnsupported
 	}
 	stateDB, err := b.blockchain.State()
@@ -455,7 +461,7 @@ func (b *SimulatedBackend) PendingCallContract(ctx context.Context, call ethereu
 	defer b.mu.Unlock()
 	defer b.pendingState.RevertToSnapshot(b.pendingState.Snapshot())
 
-	res, err := b.callContract(ctx, call, b.pendingBlock, b.pendingState)
+	res, err := b.callContract(ctx, call, b.pendingBlock.Header(), b.pendingState)
 	if err != nil {
 		return nil, err
 	}
@@ -549,7 +555,7 @@ func (b *SimulatedBackend) EstimateGas(ctx context.Context, call ethereum.CallMs
 		call.Gas = gas
 
 		snapshot := b.pendingState.Snapshot()
-		res, err := b.callContract(ctx, call, b.pendingBlock, b.pendingState)
+		res, err := b.callContract(ctx, call, b.pendingBlock.Header(), b.pendingState)
 		b.pendingState.RevertToSnapshot(snapshot)
 
 		if err != nil {
@@ -599,7 +605,7 @@ func (b *SimulatedBackend) EstimateGas(ctx context.Context, call ethereum.CallMs
 
 // callContract implements common code between normal and pending contract calls.
 // state is modified during execution, make sure to copy it if necessary.
-func (b *SimulatedBackend) callContract(ctx context.Context, call ethereum.CallMsg, block *types.Block, stateDB *state.StateDB) (*core.ExecutionResult, error) {
+func (b *SimulatedBackend) callContract(ctx context.Context, call ethereum.CallMsg, header *types.Header, stateDB *state.StateDB) (*core.ExecutionResult, error) {
 	// Gas prices post 1559 need to be initialized
 	if call.GasPrice != nil && (call.GasFeeCap != nil || call.GasTipCap != nil) {
 		return nil, errors.New("both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified")
@@ -645,7 +651,7 @@ func (b *SimulatedBackend) callContract(ctx context.Context, call ethereum.CallM
 	msg := callMsg{call}
 
 	txContext := core.NewEVMTxContext(msg)
-	evmContext := core.NewEVMBlockContext(block.Header(), b.blockchain, nil)
+	evmContext := core.NewEVMBlockContext(header, b.blockchain, nil)
 	// Create a new environment which holds all relevant information
 	// about the transaction and calling mechanisms.
 	vmEnv := vm.NewEVM(evmContext, txContext, stateDB, b.config, vm.Config{NoBaseFee: true})
@@ -854,15 +860,9 @@ func (fb *filterBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNum
 	case rpc.LatestBlockNumber:
 		return fb.bc.CurrentHeader(), nil
 	case rpc.FinalizedBlockNumber:
-		if block := fb.bc.CurrentFinalizedBlock(); block != nil {
-			return block.Header(), nil
-		}
-		return nil, errors.New("finalized block not found")
+		return fb.bc.CurrentFinalBlock(), nil
 	case rpc.SafeBlockNumber:
-		if block := fb.bc.CurrentSafeBlock(); block != nil {
-			return block.Header(), nil
-		}
-		return nil, errors.New("safe block not found")
+		return fb.bc.CurrentSafeBlock(), nil
 	default:
 		return fb.bc.GetHeaderByNumber(uint64(number.Int64())), nil
 	}
diff --git a/accounts/abi/bind/backends/simulated_test.go b/accounts/abi/bind/backends/simulated_test.go
index 40699e011636..698bfc576573 100644
--- a/accounts/abi/bind/backends/simulated_test.go
+++ b/accounts/abi/bind/backends/simulated_test.go
@@ -1189,7 +1189,7 @@ func TestFork(t *testing.T) {
 		sim.Commit()
 	}
 	// 3.
-	if sim.blockchain.CurrentBlock().NumberU64() != uint64(n) {
+	if sim.blockchain.CurrentBlock().Number.Uint64() != uint64(n) {
 		t.Error("wrong chain length")
 	}
 	// 4.
@@ -1199,7 +1199,7 @@ func TestFork(t *testing.T) {
 		sim.Commit()
 	}
 	// 6.
-	if sim.blockchain.CurrentBlock().NumberU64() != uint64(n+1) {
+	if sim.blockchain.CurrentBlock().Number.Uint64() != uint64(n+1) {
 		t.Error("wrong chain length")
 	}
 }
@@ -1344,7 +1344,7 @@ func TestCommitReturnValue(t *testing.T) {
 	sim := simTestBackend(testAddr)
 	defer sim.Close()
 
-	startBlockHeight := sim.blockchain.CurrentBlock().NumberU64()
+	startBlockHeight := sim.blockchain.CurrentBlock().Number.Uint64()
 
 	// Test if Commit returns the correct block hash
 	h1 := sim.Commit()
diff --git a/cmd/geth/chaincmd.go b/cmd/geth/chaincmd.go
index 10af6f32f49a..96999075a316 100644
--- a/cmd/geth/chaincmd.go
+++ b/cmd/geth/chaincmd.go
@@ -349,8 +349,8 @@ func exportChain(ctx *cli.Context) error {
 		if first < 0 || last < 0 {
 			utils.Fatalf("Export error: block number must be greater than 0\n")
 		}
-		if head := chain.CurrentFastBlock(); uint64(last) > head.NumberU64() {
-			utils.Fatalf("Export error: block number %d larger than head block %d\n", uint64(last), head.NumberU64())
+		if head := chain.CurrentSnapBlock(); uint64(last) > head.Number.Uint64() {
+			utils.Fatalf("Export error: block number %d larger than head block %d\n", uint64(last), head.Number.Uint64())
 		}
 		err = utils.ExportAppendChain(chain, fp, uint64(first), uint64(last))
 	}
diff --git a/cmd/utils/cmd.go b/cmd/utils/cmd.go
index d1d900a6da9d..e1bafc53c319 100644
--- a/cmd/utils/cmd.go
+++ b/cmd/utils/cmd.go
@@ -222,7 +222,7 @@ func missingBlocks(chain *core.BlockChain, blocks []*types.Block) []*types.Block
 	head := chain.CurrentBlock()
 	for i, block := range blocks {
 		// If we're behind the chain head, only check block, state is available at head
-		if head.NumberU64() > block.NumberU64() {
+		if head.Number.Uint64() > block.NumberU64() {
 			if !chain.HasBlock(block.Hash(), block.NumberU64()) {
 				return blocks[i:]
 			}
diff --git a/consensus/clique/clique_test.go b/consensus/clique/clique_test.go
index f213bc8247d6..f2c6d740c08a 100644
--- a/consensus/clique/clique_test.go
+++ b/consensus/clique/clique_test.go
@@ -93,7 +93,7 @@ func TestReimportMirroredState(t *testing.T) {
 	if _, err := chain.InsertChain(blocks[:2]); err != nil {
 		t.Fatalf("failed to insert initial blocks: %v", err)
 	}
-	if head := chain.CurrentBlock().NumberU64(); head != 2 {
+	if head := chain.CurrentBlock().Number.Uint64(); head != 2 {
 		t.Fatalf("chain head mismatch: have %d, want %d", head, 2)
 	}
 
@@ -106,7 +106,7 @@ func TestReimportMirroredState(t *testing.T) {
 	if _, err := chain.InsertChain(blocks[2:]); err != nil {
 		t.Fatalf("failed to insert final block: %v", err)
 	}
-	if head := chain.CurrentBlock().NumberU64(); head != 3 {
+	if head := chain.CurrentBlock().Number.Uint64(); head != 3 {
 		t.Fatalf("chain head mismatch: have %d, want %d", head, 3)
 	}
 }
diff --git a/core/blockchain.go b/core/blockchain.go
index 38a129d4eec5..f63ac845c1f2 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -199,10 +199,10 @@ type BlockChain struct {
 	// Readers don't need to take it, they can just read the database.
 	chainmu *syncx.ClosableMutex
 
-	currentBlock          atomic.Value // Current head of the block chain
-	currentFastBlock      atomic.Value // Current head of the fast-sync chain (may be above the block chain!)
-	currentFinalizedBlock atomic.Value // Current finalized head
-	currentSafeBlock      atomic.Value // Current safe head
+	currentBlock      atomic.Pointer[types.Header] // Current head of the chain
+	currentSnapBlock  atomic.Pointer[types.Header] // Current head of snap-sync
+	currentFinalBlock atomic.Pointer[types.Header] // Latest (consensus) finalized block
+	currentSafeBlock  atomic.Pointer[types.Header] // Latest (consensus) safe block
 
 	bodyCache     *lru.Cache[common.Hash, *types.Body]
 	bodyRLPCache  *lru.Cache[common.Hash, rlp.RawValue]
@@ -289,11 +289,10 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis *Genesis
 		return nil, ErrNoGenesis
 	}
 
-	var nilBlock *types.Block
-	bc.currentBlock.Store(nilBlock)
-	bc.currentFastBlock.Store(nilBlock)
-	bc.currentFinalizedBlock.Store(nilBlock)
-	bc.currentSafeBlock.Store(nilBlock)
+	bc.currentBlock.Store(nil)
+	bc.currentSnapBlock.Store(nil)
+	bc.currentFinalBlock.Store(nil)
+	bc.currentSafeBlock.Store(nil)
 
 	// If Geth is initialized with an external ancient store, re-initialize the
 	// missing chain indexes and chain flags. This procedure can survive crash
@@ -307,7 +306,7 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis *Genesis
 	}
 	// Make sure the state associated with the block is available
 	head := bc.CurrentBlock()
-	if !bc.HasState(head.Root()) {
+	if !bc.HasState(head.Root) {
 		// Head state is missing, before the state recovery, find out the
 		// disk layer point of snapshot(if it's enabled). Make sure the
 		// rewound point is lower than disk layer.
@@ -316,9 +315,9 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis *Genesis
 			diskRoot = rawdb.ReadSnapshotRoot(bc.db)
 		}
 		if diskRoot != (common.Hash{}) {
-			log.Warn("Head state missing, repairing", "number", head.Number(), "hash", head.Hash(), "snaproot", diskRoot)
+			log.Warn("Head state missing, repairing", "number", head.Number, "hash", head.Hash(), "snaproot", diskRoot)
 
-			snapDisk, err := bc.setHeadBeyondRoot(head.NumberU64(), 0, diskRoot, true)
+			snapDisk, err := bc.setHeadBeyondRoot(head.Number.Uint64(), 0, diskRoot, true)
 			if err != nil {
 				return nil, err
 			}
@@ -327,13 +326,12 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis *Genesis
 				rawdb.WriteSnapshotRecoveryNumber(bc.db, snapDisk)
 			}
 		} else {
-			log.Warn("Head state missing, repairing", "number", head.Number(), "hash", head.Hash())
-			if _, err := bc.setHeadBeyondRoot(head.NumberU64(), 0, common.Hash{}, true); err != nil {
+			log.Warn("Head state missing, repairing", "number", head.Number, "hash", head.Hash())
+			if _, err := bc.setHeadBeyondRoot(head.Number.Uint64(), 0, common.Hash{}, true); err != nil {
 				return nil, err
 			}
 		}
 	}
-
 	// Ensure that a previous crash in SetHead doesn't leave extra ancients
 	if frozen, err := bc.db.Ancients(); err == nil && frozen > 0 {
 		var (
@@ -344,18 +342,18 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis *Genesis
 		// blockchain repair. If the head full block is even lower than the ancient
 		// chain, truncate the ancient store.
 		fullBlock := bc.CurrentBlock()
-		if fullBlock != nil && fullBlock.Hash() != bc.genesisBlock.Hash() && fullBlock.NumberU64() < frozen-1 {
+		if fullBlock != nil && fullBlock.Hash() != bc.genesisBlock.Hash() && fullBlock.Number.Uint64() < frozen-1 {
 			needRewind = true
-			low = fullBlock.NumberU64()
+			low = fullBlock.Number.Uint64()
 		}
 		// In fast sync, it may happen that ancient data has been written to the
 		// ancient store, but the LastFastBlock has not been updated, truncate the
 		// extra data here.
-		fastBlock := bc.CurrentFastBlock()
-		if fastBlock != nil && fastBlock.NumberU64() < frozen-1 {
+		snapBlock := bc.CurrentSnapBlock()
+		if snapBlock != nil && snapBlock.Number.Uint64() < frozen-1 {
 			needRewind = true
-			if fastBlock.NumberU64() < low || low == 0 {
-				low = fastBlock.NumberU64()
+			if snapBlock.Number.Uint64() < low || low == 0 {
+				low = snapBlock.Number.Uint64()
 			}
 		}
 		if needRewind {
@@ -395,8 +393,8 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis *Genesis
 		var recover bool
 
 		head := bc.CurrentBlock()
-		if layer := rawdb.ReadSnapshotRecoveryNumber(bc.db); layer != nil && *layer >= head.NumberU64() {
-			log.Warn("Enabling snapshot recovery", "chainhead", head.NumberU64(), "diskbase", *layer)
+		if layer := rawdb.ReadSnapshotRecoveryNumber(bc.db); layer != nil && *layer >= head.Number.Uint64() {
+			log.Warn("Enabling snapshot recovery", "chainhead", head.Number, "diskbase", *layer)
 			recover = true
 		}
 		snapconfig := snapshot.Config{
@@ -405,7 +403,7 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis *Genesis
 			NoBuild:    bc.cacheConfig.SnapshotNoBuild,
 			AsyncBuild: !bc.cacheConfig.SnapshotWait,
 		}
-		bc.snaps, _ = snapshot.New(snapconfig, bc.db, bc.triedb, head.Root())
+		bc.snaps, _ = snapshot.New(snapconfig, bc.db, bc.triedb, head.Root)
 	}
 
 	// Start future block processor.
@@ -469,32 +467,32 @@ func (bc *BlockChain) loadLastState() error {
 		return bc.Reset()
 	}
 	// Make sure the entire head block is available
-	currentBlock := bc.GetBlockByHash(head)
-	if currentBlock == nil {
+	headBlock := bc.GetBlockByHash(head)
+	if headBlock == nil {
 		// Corrupt or empty database, init from scratch
 		log.Warn("Head block missing, resetting chain", "hash", head)
 		return bc.Reset()
 	}
 	// Everything seems to be fine, set as the head block
-	bc.currentBlock.Store(currentBlock)
-	headBlockGauge.Update(int64(currentBlock.NumberU64()))
+	bc.currentBlock.Store(headBlock.Header())
+	headBlockGauge.Update(int64(headBlock.NumberU64()))
 
 	// Restore the last known head header
-	currentHeader := currentBlock.Header()
+	headHeader := headBlock.Header()
 	if head := rawdb.ReadHeadHeaderHash(bc.db); head != (common.Hash{}) {
 		if header := bc.GetHeaderByHash(head); header != nil {
-			currentHeader = header
+			headHeader = header
 		}
 	}
-	bc.hc.SetCurrentHeader(currentHeader)
+	bc.hc.SetCurrentHeader(headHeader)
 
 	// Restore the last known head fast block
-	bc.currentFastBlock.Store(currentBlock)
-	headFastBlockGauge.Update(int64(currentBlock.NumberU64()))
+	bc.currentSnapBlock.Store(headBlock.Header())
+	headFastBlockGauge.Update(int64(headBlock.NumberU64()))
 
 	if head := rawdb.ReadHeadFastBlockHash(bc.db); head != (common.Hash{}) {
 		if block := bc.GetBlockByHash(head); block != nil {
-			bc.currentFastBlock.Store(block)
+			bc.currentSnapBlock.Store(block.Header())
 			headFastBlockGauge.Update(int64(block.NumberU64()))
 		}
 	}
@@ -504,27 +502,31 @@ func (bc *BlockChain) loadLastState() error {
 	// known finalized block on startup
 	if head := rawdb.ReadFinalizedBlockHash(bc.db); head != (common.Hash{}) {
 		if block := bc.GetBlockByHash(head); block != nil {
-			bc.currentFinalizedBlock.Store(block)
+			bc.currentFinalBlock.Store(block.Header())
 			headFinalizedBlockGauge.Update(int64(block.NumberU64()))
-			bc.currentSafeBlock.Store(block)
+			bc.currentSafeBlock.Store(block.Header())
 			headSafeBlockGauge.Update(int64(block.NumberU64()))
 		}
 	}
 	// Issue a status log for the user
-	currentFastBlock := bc.CurrentFastBlock()
-	currentFinalizedBlock := bc.CurrentFinalizedBlock()
-
-	headerTd := bc.GetTd(currentHeader.Hash(), currentHeader.Number.Uint64())
-	blockTd := bc.GetTd(currentBlock.Hash(), currentBlock.NumberU64())
-	fastTd := bc.GetTd(currentFastBlock.Hash(), currentFastBlock.NumberU64())
-
-	log.Info("Loaded most recent local header", "number", currentHeader.Number, "hash", currentHeader.Hash(), "td", headerTd, "age", common.PrettyAge(time.Unix(int64(currentHeader.Time), 0)))
-	log.Info("Loaded most recent local full block", "number", currentBlock.Number(), "hash", currentBlock.Hash(), "td", blockTd, "age", common.PrettyAge(time.Unix(int64(currentBlock.Time()), 0)))
-	log.Info("Loaded most recent local fast block", "number", currentFastBlock.Number(), "hash", currentFastBlock.Hash(), "td", fastTd, "age", common.PrettyAge(time.Unix(int64(currentFastBlock.Time()), 0)))
+	var (
+		currentSnapBlock  = bc.CurrentSnapBlock()
+		currentFinalBlock = bc.CurrentFinalBlock()
 
-	if currentFinalizedBlock != nil {
-		finalTd := bc.GetTd(currentFinalizedBlock.Hash(), currentFinalizedBlock.NumberU64())
-		log.Info("Loaded most recent local finalized block", "number", currentFinalizedBlock.Number(), "hash", currentFinalizedBlock.Hash(), "td", finalTd, "age", common.PrettyAge(time.Unix(int64(currentFinalizedBlock.Time()), 0)))
+		headerTd = bc.GetTd(headHeader.Hash(), headHeader.Number.Uint64())
+		blockTd  = bc.GetTd(headBlock.Hash(), headBlock.NumberU64())
+	)
+	if headHeader.Hash() != headBlock.Hash() {
+		log.Info("Loaded most recent local header", "number", headHeader.Number, "hash", headHeader.Hash(), "td", headerTd, "age", common.PrettyAge(time.Unix(int64(headHeader.Time), 0)))
+	}
+	log.Info("Loaded most recent local block", "number", headBlock.Number(), "hash", headBlock.Hash(), "td", blockTd, "age", common.PrettyAge(time.Unix(int64(headBlock.Time()), 0)))
+	if headBlock.Hash() != currentSnapBlock.Hash() {
+		fastTd := bc.GetTd(currentSnapBlock.Hash(), currentSnapBlock.Number.Uint64())
+		log.Info("Loaded most recent local snap block", "number", currentSnapBlock.Number, "hash", currentSnapBlock.Hash(), "td", fastTd, "age", common.PrettyAge(time.Unix(int64(currentSnapBlock.Time), 0)))
+	}
+	if currentFinalBlock != nil {
+		finalTd := bc.GetTd(currentFinalBlock.Hash(), currentFinalBlock.Number.Uint64())
+		log.Info("Loaded most recent local finalized block", "number", currentFinalBlock.Number, "hash", currentFinalBlock.Hash(), "td", finalTd, "age", common.PrettyAge(time.Unix(int64(currentFinalBlock.Time), 0)))
 	}
 	if pivot := rawdb.ReadLastPivotNumber(bc.db); pivot != nil {
 		log.Info("Loaded last fast-sync pivot marker", "number", *pivot)
@@ -540,7 +542,16 @@ func (bc *BlockChain) SetHead(head uint64) error {
 		return err
 	}
 	// Send chain head event to update the transaction pool
-	bc.chainHeadFeed.Send(ChainHeadEvent{Block: bc.CurrentBlock()})
+	header := bc.CurrentBlock()
+	block := bc.GetBlock(header.Hash(), header.Number.Uint64())
+	if block == nil {
+		// This should never happen. In practice, previsouly currentBlock
+		// contained the entire block whereas now only a "marker", so there
+		// is an ever so slight chance for a race we should handle.
+		log.Error("Current block not found in database", "block", header.Number, "hash", header.Hash())
+		return fmt.Errorf("current block missing: #%d [%x..]", header.Number, header.Hash().Bytes()[:4])
+	}
+	bc.chainHeadFeed.Send(ChainHeadEvent{Block: block})
 	return nil
 }
 
@@ -553,16 +564,25 @@ func (bc *BlockChain) SetHeadWithTimestamp(timestamp uint64) error {
 		return err
 	}
 	// Send chain head event to update the transaction pool
-	bc.chainHeadFeed.Send(ChainHeadEvent{Block: bc.CurrentBlock()})
+	header := bc.CurrentBlock()
+	block := bc.GetBlock(header.Hash(), header.Number.Uint64())
+	if block == nil {
+		// This should never happen. In practice, previsouly currentBlock
+		// contained the entire block whereas now only a "marker", so there
+		// is an ever so slight chance for a race we should handle.
+		log.Error("Current block not found in database", "block", header.Number, "hash", header.Hash())
+		return fmt.Errorf("current block missing: #%d [%x..]", header.Number, header.Hash().Bytes()[:4])
+	}
+	bc.chainHeadFeed.Send(ChainHeadEvent{Block: block})
 	return nil
 }
 
 // SetFinalized sets the finalized block.
-func (bc *BlockChain) SetFinalized(block *types.Block) {
-	bc.currentFinalizedBlock.Store(block)
-	if block != nil {
-		rawdb.WriteFinalizedBlockHash(bc.db, block.Hash())
-		headFinalizedBlockGauge.Update(int64(block.NumberU64()))
+func (bc *BlockChain) SetFinalized(header *types.Header) {
+	bc.currentFinalBlock.Store(header)
+	if header != nil {
+		rawdb.WriteFinalizedBlockHash(bc.db, header.Hash())
+		headFinalizedBlockGauge.Update(int64(header.Number.Uint64()))
 	} else {
 		rawdb.WriteFinalizedBlockHash(bc.db, common.Hash{})
 		headFinalizedBlockGauge.Update(0)
@@ -570,10 +590,10 @@ func (bc *BlockChain) SetFinalized(block *types.Block) {
 }
 
 // SetSafe sets the safe block.
-func (bc *BlockChain) SetSafe(block *types.Block) {
-	bc.currentSafeBlock.Store(block)
-	if block != nil {
-		headSafeBlockGauge.Update(int64(block.NumberU64()))
+func (bc *BlockChain) SetSafe(header *types.Header) {
+	bc.currentSafeBlock.Store(header)
+	if header != nil {
+		headSafeBlockGauge.Update(int64(header.Number.Uint64()))
 	} else {
 		headSafeBlockGauge.Update(0)
 	}
@@ -609,7 +629,7 @@ func (bc *BlockChain) setHeadBeyondRoot(head uint64, time uint64, root common.Ha
 		// Rewind the blockchain, ensuring we don't end up with a stateless head
 		// block. Note, depth equality is permitted to allow using SetHead as a
 		// chain reparation mechanism without deleting any data!
-		if currentBlock := bc.CurrentBlock(); currentBlock != nil && header.Number.Uint64() <= currentBlock.NumberU64() {
+		if currentBlock := bc.CurrentBlock(); currentBlock != nil && header.Number.Uint64() <= currentBlock.Number.Uint64() {
 			newHeadBlock := bc.GetBlock(header.Hash(), header.Number.Uint64())
 			if newHeadBlock == nil {
 				log.Error("Gap in the chain, rewinding to genesis", "number", header.Number, "hash", header.Hash())
@@ -667,27 +687,27 @@ func (bc *BlockChain) setHeadBeyondRoot(head uint64, time uint64, root common.Ha
 			// In theory we should update all in-memory markers in the
 			// last step, however the direction of SetHead is from high
 			// to low, so it's safe to update in-memory markers directly.
-			bc.currentBlock.Store(newHeadBlock)
+			bc.currentBlock.Store(newHeadBlock.Header())
 			headBlockGauge.Update(int64(newHeadBlock.NumberU64()))
 		}
 		// Rewind the fast block in a simpleton way to the target head
-		if currentFastBlock := bc.CurrentFastBlock(); currentFastBlock != nil && header.Number.Uint64() < currentFastBlock.NumberU64() {
-			newHeadFastBlock := bc.GetBlock(header.Hash(), header.Number.Uint64())
+		if currentSnapBlock := bc.CurrentSnapBlock(); currentSnapBlock != nil && header.Number.Uint64() < currentSnapBlock.Number.Uint64() {
+			newHeadSnapBlock := bc.GetBlock(header.Hash(), header.Number.Uint64())
 			// If either blocks reached nil, reset to the genesis state
-			if newHeadFastBlock == nil {
-				newHeadFastBlock = bc.genesisBlock
+			if newHeadSnapBlock == nil {
+				newHeadSnapBlock = bc.genesisBlock
 			}
-			rawdb.WriteHeadFastBlockHash(db, newHeadFastBlock.Hash())
+			rawdb.WriteHeadFastBlockHash(db, newHeadSnapBlock.Hash())
 
 			// Degrade the chain markers if they are explicitly reverted.
 			// In theory we should update all in-memory markers in the
 			// last step, however the direction of SetHead is from high
 			// to low, so it's safe the update in-memory markers directly.
-			bc.currentFastBlock.Store(newHeadFastBlock)
-			headFastBlockGauge.Update(int64(newHeadFastBlock.NumberU64()))
+			bc.currentSnapBlock.Store(newHeadSnapBlock.Header())
+			headFastBlockGauge.Update(int64(newHeadSnapBlock.NumberU64()))
 		}
 		var (
-			headHeader = bc.CurrentBlock().Header()
+			headHeader = bc.CurrentBlock()
 			headNumber = headHeader.Number.Uint64()
 		)
 		// If setHead underflown the freezer threshold and the block processing
@@ -723,7 +743,7 @@ func (bc *BlockChain) setHeadBeyondRoot(head uint64, time uint64, root common.Ha
 	// If SetHead was only called as a chain reparation method, try to skip
 	// touching the header chain altogether, unless the freezer is broken
 	if repair {
-		if target, force := updateFn(bc.db, bc.CurrentBlock().Header()); force {
+		if target, force := updateFn(bc.db, bc.CurrentBlock()); force {
 			bc.hc.SetHead(target.Number.Uint64(), updateFn, delFn)
 		}
 	} else {
@@ -746,15 +766,14 @@ func (bc *BlockChain) setHeadBeyondRoot(head uint64, time uint64, root common.Ha
 	bc.futureBlocks.Purge()
 
 	// Clear safe block, finalized block if needed
-	if safe := bc.CurrentSafeBlock(); safe != nil && head < safe.NumberU64() {
+	if safe := bc.CurrentSafeBlock(); safe != nil && head < safe.Number.Uint64() {
 		log.Warn("SetHead invalidated safe block")
 		bc.SetSafe(nil)
 	}
-	if finalized := bc.CurrentFinalizedBlock(); finalized != nil && head < finalized.NumberU64() {
+	if finalized := bc.CurrentFinalBlock(); finalized != nil && head < finalized.Number.Uint64() {
 		log.Error("SetHead invalidated finalized block")
 		bc.SetFinalized(nil)
 	}
-
 	return rootNumber, bc.loadLastState()
 }
 
@@ -774,7 +793,7 @@ func (bc *BlockChain) SnapSyncCommitHead(hash common.Hash) error {
 	if !bc.chainmu.TryLock() {
 		return errChainStopped
 	}
-	bc.currentBlock.Store(block)
+	bc.currentBlock.Store(block.Header())
 	headBlockGauge.Update(int64(block.NumberU64()))
 	bc.chainmu.Unlock()
 
@@ -815,18 +834,18 @@ func (bc *BlockChain) ResetWithGenesisBlock(genesis *types.Block) error {
 
 	// Last update all in-memory chain markers
 	bc.genesisBlock = genesis
-	bc.currentBlock.Store(bc.genesisBlock)
+	bc.currentBlock.Store(bc.genesisBlock.Header())
 	headBlockGauge.Update(int64(bc.genesisBlock.NumberU64()))
 	bc.hc.SetGenesis(bc.genesisBlock.Header())
 	bc.hc.SetCurrentHeader(bc.genesisBlock.Header())
-	bc.currentFastBlock.Store(bc.genesisBlock)
+	bc.currentSnapBlock.Store(bc.genesisBlock.Header())
 	headFastBlockGauge.Update(int64(bc.genesisBlock.NumberU64()))
 	return nil
 }
 
 // Export writes the active chain to the given writer.
 func (bc *BlockChain) Export(w io.Writer) error {
-	return bc.ExportN(w, uint64(0), bc.CurrentBlock().NumberU64())
+	return bc.ExportN(w, uint64(0), bc.CurrentBlock().Number.Uint64())
 }
 
 // ExportN writes a subset of the active chain to the given writer.
@@ -883,10 +902,10 @@ func (bc *BlockChain) writeHeadBlock(block *types.Block) {
 	// Update all in-memory chain markers in the last step
 	bc.hc.SetCurrentHeader(block.Header())
 
-	bc.currentFastBlock.Store(block)
+	bc.currentSnapBlock.Store(block.Header())
 	headFastBlockGauge.Update(int64(block.NumberU64()))
 
-	bc.currentBlock.Store(block)
+	bc.currentBlock.Store(block.Header())
 	headBlockGauge.Update(int64(block.NumberU64()))
 }
 
@@ -927,7 +946,7 @@ func (bc *BlockChain) Stop() {
 	var snapBase common.Hash
 	if bc.snaps != nil {
 		var err error
-		if snapBase, err = bc.snaps.Journal(bc.CurrentBlock().Root()); err != nil {
+		if snapBase, err = bc.snaps.Journal(bc.CurrentBlock().Root); err != nil {
 			log.Error("Failed to journal state snapshot", "err", err)
 		}
 	}
@@ -941,7 +960,7 @@ func (bc *BlockChain) Stop() {
 		triedb := bc.triedb
 
 		for _, offset := range []uint64{0, 1, TriesInMemory - 1} {
-			if number := bc.CurrentBlock().NumberU64(); number > offset {
+			if number := bc.CurrentBlock().Number.Uint64(); number > offset {
 				recent := bc.GetBlockByNumber(number - offset)
 
 				log.Info("Writing cached state to disk", "block", recent.Number(), "hash", recent.Hash(), "root", recent.Root())
@@ -1059,7 +1078,7 @@ func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain [
 
 		// Rewind may have occurred, skip in that case.
 		if bc.CurrentHeader().Number.Cmp(head.Number()) >= 0 {
-			reorg, err := bc.forker.ReorgNeeded(bc.CurrentFastBlock().Header(), head.Header())
+			reorg, err := bc.forker.ReorgNeeded(bc.CurrentSnapBlock(), head.Header())
 			if err != nil {
 				log.Warn("Reorg failed", "err", err)
 				return false
@@ -1067,13 +1086,12 @@ func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain [
 				return false
 			}
 			rawdb.WriteHeadFastBlockHash(bc.db, head.Hash())
-			bc.currentFastBlock.Store(head)
+			bc.currentSnapBlock.Store(head.Header())
 			headFastBlockGauge.Update(int64(head.NumberU64()))
 			return true
 		}
 		return false
 	}
-
 	// writeAncient writes blockchain and corresponding receipt chain into ancient store.
 	//
 	// this function only accepts canonical chain data. All side chain will be reverted
@@ -1135,8 +1153,8 @@ func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain [
 			if batch.ValueSize() > ethdb.IdealBatchSize || i == len(blockChain)-1 {
 				size += int64(batch.ValueSize())
 				if err = batch.Write(); err != nil {
-					fastBlock := bc.CurrentFastBlock().NumberU64()
-					if err := bc.db.TruncateHead(fastBlock + 1); err != nil {
+					snapBlock := bc.CurrentSnapBlock().Number.Uint64()
+					if err := bc.db.TruncateHead(snapBlock + 1); err != nil {
 						log.Error("Can't truncate ancient store after failed insert", "err", err)
 					}
 					return 0, err
@@ -1150,11 +1168,11 @@ func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain [
 			return 0, err
 		}
 		// Update the current fast block because all block data is now present in DB.
-		previousFastBlock := bc.CurrentFastBlock().NumberU64()
+		previousSnapBlock := bc.CurrentSnapBlock().Number.Uint64()
 		if !updateHead(blockChain[len(blockChain)-1]) {
 			// We end up here if the header chain has reorg'ed, and the blocks/receipts
 			// don't match the canonical chain.
-			if err := bc.db.TruncateHead(previousFastBlock + 1); err != nil {
+			if err := bc.db.TruncateHead(previousSnapBlock + 1); err != nil {
 				log.Error("Can't truncate ancient store after failed insert", "err", err)
 			}
 			return 0, errSideChainReceipts
@@ -1414,7 +1432,7 @@ func (bc *BlockChain) writeBlockAndSetHead(block *types.Block, receipts []*types
 		return NonStatTy, err
 	}
 	currentBlock := bc.CurrentBlock()
-	reorg, err := bc.forker.ReorgNeeded(currentBlock.Header(), block.Header())
+	reorg, err := bc.forker.ReorgNeeded(currentBlock, block.Header())
 	if err != nil {
 		return NonStatTy, err
 	}
@@ -1562,7 +1580,7 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals, setHead bool)
 			current = bc.CurrentBlock()
 		)
 		for block != nil && bc.skipBlock(err, it) {
-			reorg, err = bc.forker.ReorgNeeded(current.Header(), block.Header())
+			reorg, err = bc.forker.ReorgNeeded(current, block.Header())
 			if err != nil {
 				return it.index, err
 			}
@@ -1572,7 +1590,7 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals, setHead bool)
 				// In eth2 the forker always returns true for reorg decision (blindly trusting
 				// the external consensus engine), but in order to prevent the unnecessary
 				// reorgs when importing known blocks, the special case is handled here.
-				if block.NumberU64() > current.NumberU64() || bc.GetCanonicalHash(block.NumberU64()) != block.Hash() {
+				if block.NumberU64() > current.Number.Uint64() || bc.GetCanonicalHash(block.NumberU64()) != block.Hash() {
 					break
 				}
 			}
@@ -1872,7 +1890,7 @@ func (bc *BlockChain) insertSideChain(block *types.Block, it *insertIterator) (i
 	err := consensus.ErrPrunedAncestor
 	for ; block != nil && errors.Is(err, consensus.ErrPrunedAncestor); block, err = it.next() {
 		// Check the canonical state root for that number
-		if number := block.NumberU64(); current.NumberU64() >= number {
+		if number := block.NumberU64(); current.Number.Uint64() >= number {
 			canonical := bc.GetBlockByNumber(number)
 			if canonical != nil && canonical.Hash() == block.Hash() {
 				// Not a sidechain block, this is a re-import of a canon block which has it's state pruned
@@ -1922,12 +1940,12 @@ func (bc *BlockChain) insertSideChain(block *types.Block, it *insertIterator) (i
 	//
 	// If the externTd was larger than our local TD, we now need to reimport the previous
 	// blocks to regenerate the required state
-	reorg, err := bc.forker.ReorgNeeded(current.Header(), lastBlock.Header())
+	reorg, err := bc.forker.ReorgNeeded(current, lastBlock.Header())
 	if err != nil {
 		return it.index, err
 	}
 	if !reorg {
-		localTd := bc.GetTd(current.Hash(), current.NumberU64())
+		localTd := bc.GetTd(current.Hash(), current.Number.Uint64())
 		log.Info("Sidechain written to disk", "start", it.first().NumberU64(), "end", it.previous().Number, "sidetd", externTd, "localtd", localTd)
 		return it.index, err
 	}
@@ -2051,7 +2069,7 @@ func (bc *BlockChain) collectLogs(b *types.Block, removed bool) []*types.Log {
 // potential missing transactions and post an event about them.
 // Note the new head block won't be processed here, callers need to handle it
 // externally.
-func (bc *BlockChain) reorg(oldBlock, newBlock *types.Block) error {
+func (bc *BlockChain) reorg(oldHead *types.Header, newHead *types.Block) error {
 	var (
 		newChain    types.Blocks
 		oldChain    types.Blocks
@@ -2060,6 +2078,12 @@ func (bc *BlockChain) reorg(oldBlock, newBlock *types.Block) error {
 		deletedTxs []common.Hash
 		addedTxs   []common.Hash
 	)
+	oldBlock := bc.GetBlock(oldHead.Hash(), oldHead.Number.Uint64())
+	if oldBlock == nil {
+		return errors.New("current head block missing")
+	}
+	newBlock := newHead
+
 	// Reduce the longer chain to the same number as the shorter one
 	if oldBlock.NumberU64() > newBlock.NumberU64() {
 		// Old chain is longer, gather all transactions and logs as deleted ones
@@ -2076,10 +2100,10 @@ func (bc *BlockChain) reorg(oldBlock, newBlock *types.Block) error {
 		}
 	}
 	if oldBlock == nil {
-		return fmt.Errorf("invalid old chain")
+		return errors.New("invalid old chain")
 	}
 	if newBlock == nil {
-		return fmt.Errorf("invalid new chain")
+		return errors.New("invalid new chain")
 	}
 	// Both sides of the reorg are at the same number, reduce both until the common
 	// ancestor is found
diff --git a/core/blockchain_reader.go b/core/blockchain_reader.go
index e8a5d952a240..21a9c6676bd5 100644
--- a/core/blockchain_reader.go
+++ b/core/blockchain_reader.go
@@ -40,26 +40,26 @@ func (bc *BlockChain) CurrentHeader() *types.Header {
 
 // CurrentBlock retrieves the current head block of the canonical chain. The
 // block is retrieved from the blockchain's internal cache.
-func (bc *BlockChain) CurrentBlock() *types.Block {
-	return bc.currentBlock.Load().(*types.Block)
+func (bc *BlockChain) CurrentBlock() *types.Header {
+	return bc.currentBlock.Load()
 }
 
-// CurrentFastBlock retrieves the current fast-sync head block of the canonical
+// CurrentSnapBlock retrieves the current snap-sync head block of the canonical
 // chain. The block is retrieved from the blockchain's internal cache.
-func (bc *BlockChain) CurrentFastBlock() *types.Block {
-	return bc.currentFastBlock.Load().(*types.Block)
+func (bc *BlockChain) CurrentSnapBlock() *types.Header {
+	return bc.currentSnapBlock.Load()
 }
 
-// CurrentFinalizedBlock retrieves the current finalized block of the canonical
+// CurrentFinalBlock retrieves the current finalized block of the canonical
 // chain. The block is retrieved from the blockchain's internal cache.
-func (bc *BlockChain) CurrentFinalizedBlock() *types.Block {
-	return bc.currentFinalizedBlock.Load().(*types.Block)
+func (bc *BlockChain) CurrentFinalBlock() *types.Header {
+	return bc.currentFinalBlock.Load()
 }
 
 // CurrentSafeBlock retrieves the current safe block of the canonical
 // chain. The block is retrieved from the blockchain's internal cache.
-func (bc *BlockChain) CurrentSafeBlock() *types.Block {
-	return bc.currentSafeBlock.Load().(*types.Block)
+func (bc *BlockChain) CurrentSafeBlock() *types.Header {
+	return bc.currentSafeBlock.Load()
 }
 
 // HasHeader checks if a block header is present in the database or not, caching
@@ -315,7 +315,7 @@ func (bc *BlockChain) ContractCodeWithPrefix(hash common.Hash) ([]byte, error) {
 
 // State returns a new mutable state based on the current HEAD block.
 func (bc *BlockChain) State() (*state.StateDB, error) {
-	return bc.StateAt(bc.CurrentBlock().Root())
+	return bc.StateAt(bc.CurrentBlock().Root)
 }
 
 // StateAt returns a new mutable state based on a particular point in time.
@@ -351,7 +351,7 @@ func (bc *BlockChain) StateCache() state.Database {
 
 // GasLimit returns the gas limit of the current HEAD block.
 func (bc *BlockChain) GasLimit() uint64 {
-	return bc.CurrentBlock().GasLimit()
+	return bc.CurrentBlock().GasLimit
 }
 
 // Genesis retrieves the chain's genesis block.
diff --git a/core/blockchain_repair_test.go b/core/blockchain_repair_test.go
index 5db0fb5703d3..6a4a9c9d22bd 100644
--- a/core/blockchain_repair_test.go
+++ b/core/blockchain_repair_test.go
@@ -1857,11 +1857,11 @@ func testRepair(t *testing.T, tt *rewindTest, snapshots bool) {
 	if head := newChain.CurrentHeader(); head.Number.Uint64() != tt.expHeadHeader {
 		t.Errorf("Head header mismatch: have %d, want %d", head.Number, tt.expHeadHeader)
 	}
-	if head := newChain.CurrentFastBlock(); head.NumberU64() != tt.expHeadFastBlock {
-		t.Errorf("Head fast block mismatch: have %d, want %d", head.NumberU64(), tt.expHeadFastBlock)
+	if head := newChain.CurrentSnapBlock(); head.Number.Uint64() != tt.expHeadFastBlock {
+		t.Errorf("Head fast block mismatch: have %d, want %d", head.Number, tt.expHeadFastBlock)
 	}
-	if head := newChain.CurrentBlock(); head.NumberU64() != tt.expHeadBlock {
-		t.Errorf("Head block mismatch: have %d, want %d", head.NumberU64(), tt.expHeadBlock)
+	if head := newChain.CurrentBlock(); head.Number.Uint64() != tt.expHeadBlock {
+		t.Errorf("Head block mismatch: have %d, want %d", head.Number, tt.expHeadBlock)
 	}
 	if frozen, err := db.(freezer).Ancients(); err != nil {
 		t.Errorf("Failed to retrieve ancient count: %v\n", err)
@@ -1973,11 +1973,11 @@ func TestIssue23496(t *testing.T) {
 	if head := chain.CurrentHeader(); head.Number.Uint64() != uint64(4) {
 		t.Errorf("Head header mismatch: have %d, want %d", head.Number, 4)
 	}
-	if head := chain.CurrentFastBlock(); head.NumberU64() != uint64(4) {
-		t.Errorf("Head fast block mismatch: have %d, want %d", head.NumberU64(), uint64(4))
+	if head := chain.CurrentSnapBlock(); head.Number.Uint64() != uint64(4) {
+		t.Errorf("Head fast block mismatch: have %d, want %d", head.Number, uint64(4))
 	}
-	if head := chain.CurrentBlock(); head.NumberU64() != uint64(1) {
-		t.Errorf("Head block mismatch: have %d, want %d", head.NumberU64(), uint64(1))
+	if head := chain.CurrentBlock(); head.Number.Uint64() != uint64(1) {
+		t.Errorf("Head block mismatch: have %d, want %d", head.Number, uint64(1))
 	}
 
 	// Reinsert B2-B4
@@ -1987,11 +1987,11 @@ func TestIssue23496(t *testing.T) {
 	if head := chain.CurrentHeader(); head.Number.Uint64() != uint64(4) {
 		t.Errorf("Head header mismatch: have %d, want %d", head.Number, 4)
 	}
-	if head := chain.CurrentFastBlock(); head.NumberU64() != uint64(4) {
-		t.Errorf("Head fast block mismatch: have %d, want %d", head.NumberU64(), uint64(4))
+	if head := chain.CurrentSnapBlock(); head.Number.Uint64() != uint64(4) {
+		t.Errorf("Head fast block mismatch: have %d, want %d", head.Number, uint64(4))
 	}
-	if head := chain.CurrentBlock(); head.NumberU64() != uint64(4) {
-		t.Errorf("Head block mismatch: have %d, want %d", head.NumberU64(), uint64(4))
+	if head := chain.CurrentBlock(); head.Number.Uint64() != uint64(4) {
+		t.Errorf("Head block mismatch: have %d, want %d", head.Number, uint64(4))
 	}
 	if layer := chain.Snapshots().Snapshot(blocks[2].Root()); layer == nil {
 		t.Error("Failed to regenerate the snapshot of known state")
diff --git a/core/blockchain_sethead_test.go b/core/blockchain_sethead_test.go
index 825a0e16b430..9dc350db849e 100644
--- a/core/blockchain_sethead_test.go
+++ b/core/blockchain_sethead_test.go
@@ -2047,11 +2047,11 @@ func testSetHead(t *testing.T, tt *rewindTest, snapshots bool) {
 	if head := chain.CurrentHeader(); head.Number.Uint64() != tt.expHeadHeader {
 		t.Errorf("Head header mismatch: have %d, want %d", head.Number, tt.expHeadHeader)
 	}
-	if head := chain.CurrentFastBlock(); head.NumberU64() != tt.expHeadFastBlock {
-		t.Errorf("Head fast block mismatch: have %d, want %d", head.NumberU64(), tt.expHeadFastBlock)
+	if head := chain.CurrentSnapBlock(); head.Number.Uint64() != tt.expHeadFastBlock {
+		t.Errorf("Head fast block mismatch: have %d, want %d", head.Number, tt.expHeadFastBlock)
 	}
-	if head := chain.CurrentBlock(); head.NumberU64() != tt.expHeadBlock {
-		t.Errorf("Head block mismatch: have %d, want %d", head.NumberU64(), tt.expHeadBlock)
+	if head := chain.CurrentBlock(); head.Number.Uint64() != tt.expHeadBlock {
+		t.Errorf("Head block mismatch: have %d, want %d", head.Number, tt.expHeadBlock)
 	}
 	if frozen, err := db.(freezer).Ancients(); err != nil {
 		t.Errorf("Failed to retrieve ancient count: %v\n", err)
diff --git a/core/blockchain_snapshot_test.go b/core/blockchain_snapshot_test.go
index b34ea573c1ae..3bd876a58ec7 100644
--- a/core/blockchain_snapshot_test.go
+++ b/core/blockchain_snapshot_test.go
@@ -136,11 +136,11 @@ func (basic *snapshotTestBasic) verify(t *testing.T, chain *BlockChain, blocks [
 	if head := chain.CurrentHeader(); head.Number.Uint64() != basic.expHeadHeader {
 		t.Errorf("Head header mismatch: have %d, want %d", head.Number, basic.expHeadHeader)
 	}
-	if head := chain.CurrentFastBlock(); head.NumberU64() != basic.expHeadFastBlock {
-		t.Errorf("Head fast block mismatch: have %d, want %d", head.NumberU64(), basic.expHeadFastBlock)
+	if head := chain.CurrentSnapBlock(); head.Number.Uint64() != basic.expHeadFastBlock {
+		t.Errorf("Head fast block mismatch: have %d, want %d", head.Number, basic.expHeadFastBlock)
 	}
-	if head := chain.CurrentBlock(); head.NumberU64() != basic.expHeadBlock {
-		t.Errorf("Head block mismatch: have %d, want %d", head.NumberU64(), basic.expHeadBlock)
+	if head := chain.CurrentBlock(); head.Number.Uint64() != basic.expHeadBlock {
+		t.Errorf("Head block mismatch: have %d, want %d", head.Number, basic.expHeadBlock)
 	}
 
 	// Check the disk layer, ensure they are matched
diff --git a/core/blockchain_test.go b/core/blockchain_test.go
index ae77d0b7f669..0f9ef6a1921a 100644
--- a/core/blockchain_test.go
+++ b/core/blockchain_test.go
@@ -109,7 +109,7 @@ func testFork(t *testing.T, blockchain *BlockChain, i, n int, full bool, compara
 		headerChainB []*types.Header
 	)
 	if full {
-		blockChainB = makeBlockChain(blockchain2.chainConfig, blockchain2.CurrentBlock(), n, ethash.NewFaker(), genDb, forkSeed)
+		blockChainB = makeBlockChain(blockchain2.chainConfig, blockchain2.GetBlockByHash(blockchain2.CurrentBlock().Hash()), n, ethash.NewFaker(), genDb, forkSeed)
 		if _, err := blockchain2.InsertChain(blockChainB); err != nil {
 			t.Fatalf("failed to insert forking chain: %v", err)
 		}
@@ -124,7 +124,7 @@ func testFork(t *testing.T, blockchain *BlockChain, i, n int, full bool, compara
 
 	if full {
 		cur := blockchain.CurrentBlock()
-		tdPre = blockchain.GetTd(cur.Hash(), cur.NumberU64())
+		tdPre = blockchain.GetTd(cur.Hash(), cur.Number.Uint64())
 		if err := testBlockChainImport(blockChainB, blockchain); err != nil {
 			t.Fatalf("failed to import forked block chain: %v", err)
 		}
@@ -206,7 +206,7 @@ func TestLastBlock(t *testing.T) {
 	}
 	defer blockchain.Stop()
 
-	blocks := makeBlockChain(blockchain.chainConfig, blockchain.CurrentBlock(), 1, ethash.NewFullFaker(), genDb, 0)
+	blocks := makeBlockChain(blockchain.chainConfig, blockchain.GetBlockByHash(blockchain.CurrentBlock().Hash()), 1, ethash.NewFullFaker(), genDb, 0)
 	if _, err := blockchain.InsertChain(blocks); err != nil {
 		t.Fatalf("Failed to insert block: %v", err)
 	}
@@ -240,11 +240,11 @@ func testInsertAfterMerge(t *testing.T, blockchain *BlockChain, i, n int, full b
 
 	// Extend the newly created chain
 	if full {
-		blockChainB := makeBlockChain(blockchain2.chainConfig, blockchain2.CurrentBlock(), n, ethash.NewFaker(), genDb, forkSeed)
+		blockChainB := makeBlockChain(blockchain2.chainConfig, blockchain2.GetBlockByHash(blockchain2.CurrentBlock().Hash()), n, ethash.NewFaker(), genDb, forkSeed)
 		if _, err := blockchain2.InsertChain(blockChainB); err != nil {
 			t.Fatalf("failed to insert forking chain: %v", err)
 		}
-		if blockchain2.CurrentBlock().NumberU64() != blockChainB[len(blockChainB)-1].NumberU64() {
+		if blockchain2.CurrentBlock().Number.Uint64() != blockChainB[len(blockChainB)-1].NumberU64() {
 			t.Fatalf("failed to reorg to the given chain")
 		}
 		if blockchain2.CurrentBlock().Hash() != blockChainB[len(blockChainB)-1].Hash() {
@@ -477,7 +477,7 @@ func testBrokenChain(t *testing.T, full bool) {
 
 	// Create a forked chain, and try to insert with a missing link
 	if full {
-		chain := makeBlockChain(blockchain.chainConfig, blockchain.CurrentBlock(), 5, ethash.NewFaker(), genDb, forkSeed)[1:]
+		chain := makeBlockChain(blockchain.chainConfig, blockchain.GetBlockByHash(blockchain.CurrentBlock().Hash()), 5, ethash.NewFaker(), genDb, forkSeed)[1:]
 		if err := testBlockChainImport(chain, blockchain); err == nil {
 			t.Errorf("broken block chain not reported")
 		}
@@ -527,10 +527,10 @@ func testReorg(t *testing.T, first, second []int64, td int64, full bool) {
 	defer blockchain.Stop()
 
 	// Insert an easy and a difficult chain afterwards
-	easyBlocks, _ := GenerateChain(params.TestChainConfig, blockchain.CurrentBlock(), ethash.NewFaker(), genDb, len(first), func(i int, b *BlockGen) {
+	easyBlocks, _ := GenerateChain(params.TestChainConfig, blockchain.GetBlockByHash(blockchain.CurrentBlock().Hash()), ethash.NewFaker(), genDb, len(first), func(i int, b *BlockGen) {
 		b.OffsetTime(first[i])
 	})
-	diffBlocks, _ := GenerateChain(params.TestChainConfig, blockchain.CurrentBlock(), ethash.NewFaker(), genDb, len(second), func(i int, b *BlockGen) {
+	diffBlocks, _ := GenerateChain(params.TestChainConfig, blockchain.GetBlockByHash(blockchain.CurrentBlock().Hash()), ethash.NewFaker(), genDb, len(second), func(i int, b *BlockGen) {
 		b.OffsetTime(second[i])
 	})
 	if full {
@@ -559,9 +559,9 @@ func testReorg(t *testing.T, first, second []int64, td int64, full bool) {
 	// Check that the chain is valid number and link wise
 	if full {
 		prev := blockchain.CurrentBlock()
-		for block := blockchain.GetBlockByNumber(blockchain.CurrentBlock().NumberU64() - 1); block.NumberU64() != 0; prev, block = block, blockchain.GetBlockByNumber(block.NumberU64()-1) {
-			if prev.ParentHash() != block.Hash() {
-				t.Errorf("parent block hash mismatch: have %x, want %x", prev.ParentHash(), block.Hash())
+		for block := blockchain.GetBlockByNumber(blockchain.CurrentBlock().Number.Uint64() - 1); block.NumberU64() != 0; prev, block = block.Header(), blockchain.GetBlockByNumber(block.NumberU64()-1) {
+			if prev.ParentHash != block.Hash() {
+				t.Errorf("parent block hash mismatch: have %x, want %x", prev.ParentHash, block.Hash())
 			}
 		}
 	} else {
@@ -576,7 +576,7 @@ func testReorg(t *testing.T, first, second []int64, td int64, full bool) {
 	want := new(big.Int).Add(blockchain.genesisBlock.Difficulty(), big.NewInt(td))
 	if full {
 		cur := blockchain.CurrentBlock()
-		if have := blockchain.GetTd(cur.Hash(), cur.NumberU64()); have.Cmp(want) != 0 {
+		if have := blockchain.GetTd(cur.Hash(), cur.Number.Uint64()); have.Cmp(want) != 0 {
 			t.Errorf("total difficulty mismatch: have %v, want %v", have, want)
 		}
 	} else {
@@ -601,7 +601,7 @@ func testBadHashes(t *testing.T, full bool) {
 
 	// Create a chain, ban a hash and try to import
 	if full {
-		blocks := makeBlockChain(blockchain.chainConfig, blockchain.CurrentBlock(), 3, ethash.NewFaker(), genDb, 10)
+		blocks := makeBlockChain(blockchain.chainConfig, blockchain.GetBlockByHash(blockchain.CurrentBlock().Hash()), 3, ethash.NewFaker(), genDb, 10)
 
 		BadHashes[blocks[2].Header().Hash()] = true
 		defer func() { delete(BadHashes, blocks[2].Header().Hash()) }()
@@ -633,7 +633,7 @@ func testReorgBadHashes(t *testing.T, full bool) {
 	}
 	// Create a chain, import and ban afterwards
 	headers := makeHeaderChain(blockchain.chainConfig, blockchain.CurrentHeader(), 4, ethash.NewFaker(), genDb, 10)
-	blocks := makeBlockChain(blockchain.chainConfig, blockchain.CurrentBlock(), 4, ethash.NewFaker(), genDb, 10)
+	blocks := makeBlockChain(blockchain.chainConfig, blockchain.GetBlockByHash(blockchain.CurrentBlock().Hash()), 4, ethash.NewFaker(), genDb, 10)
 
 	if full {
 		if _, err = blockchain.InsertChain(blocks); err != nil {
@@ -696,7 +696,7 @@ func testInsertNonceError(t *testing.T, full bool) {
 			failNum uint64
 		)
 		if full {
-			blocks := makeBlockChain(blockchain.chainConfig, blockchain.CurrentBlock(), i, ethash.NewFaker(), genDb, 0)
+			blocks := makeBlockChain(blockchain.chainConfig, blockchain.GetBlockByHash(blockchain.CurrentBlock().Hash()), i, ethash.NewFaker(), genDb, 0)
 
 			failAt = rand.Int() % len(blocks)
 			failNum = blocks[failAt].NumberU64()
@@ -894,11 +894,11 @@ func TestLightVsFastVsFullChainHeads(t *testing.T) {
 	assert := func(t *testing.T, kind string, chain *BlockChain, header uint64, fast uint64, block uint64) {
 		t.Helper()
 
-		if num := chain.CurrentBlock().NumberU64(); num != block {
+		if num := chain.CurrentBlock().Number.Uint64(); num != block {
 			t.Errorf("%s head block mismatch: have #%v, want #%v", kind, num, block)
 		}
-		if num := chain.CurrentFastBlock().NumberU64(); num != fast {
-			t.Errorf("%s head fast-block mismatch: have #%v, want #%v", kind, num, fast)
+		if num := chain.CurrentSnapBlock().Number.Uint64(); num != fast {
+			t.Errorf("%s head snap-block mismatch: have #%v, want #%v", kind, num, fast)
 		}
 		if num := chain.CurrentHeader().Number.Uint64(); num != header {
 			t.Errorf("%s head header mismatch: have #%v, want #%v", kind, num, header)
@@ -1649,13 +1649,13 @@ func TestBlockchainHeaderchainReorgConsistency(t *testing.T) {
 			t.Fatalf("block %d: failed to insert into chain: %v", i, err)
 		}
 		if chain.CurrentBlock().Hash() != chain.CurrentHeader().Hash() {
-			t.Errorf("block %d: current block/header mismatch: block #%d [%x..], header #%d [%x..]", i, chain.CurrentBlock().Number(), chain.CurrentBlock().Hash().Bytes()[:4], chain.CurrentHeader().Number, chain.CurrentHeader().Hash().Bytes()[:4])
+			t.Errorf("block %d: current block/header mismatch: block #%d [%x..], header #%d [%x..]", i, chain.CurrentBlock().Number, chain.CurrentBlock().Hash().Bytes()[:4], chain.CurrentHeader().Number, chain.CurrentHeader().Hash().Bytes()[:4])
 		}
 		if _, err := chain.InsertChain(forks[i : i+1]); err != nil {
 			t.Fatalf(" fork %d: failed to insert into chain: %v", i, err)
 		}
 		if chain.CurrentBlock().Hash() != chain.CurrentHeader().Hash() {
-			t.Errorf(" fork %d: current block/header mismatch: block #%d [%x..], header #%d [%x..]", i, chain.CurrentBlock().Number(), chain.CurrentBlock().Hash().Bytes()[:4], chain.CurrentHeader().Number, chain.CurrentHeader().Hash().Bytes()[:4])
+			t.Errorf(" fork %d: current block/header mismatch: block #%d [%x..], header #%d [%x..]", i, chain.CurrentBlock().Number, chain.CurrentBlock().Hash().Bytes()[:4], chain.CurrentHeader().Number, chain.CurrentHeader().Hash().Bytes()[:4])
 		}
 	}
 }
@@ -1797,11 +1797,11 @@ func TestBlockchainRecovery(t *testing.T) {
 	// Reopen broken blockchain again
 	ancient, _ = NewBlockChain(ancientDb, nil, gspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
 	defer ancient.Stop()
-	if num := ancient.CurrentBlock().NumberU64(); num != 0 {
+	if num := ancient.CurrentBlock().Number.Uint64(); num != 0 {
 		t.Errorf("head block mismatch: have #%v, want #%v", num, 0)
 	}
-	if num := ancient.CurrentFastBlock().NumberU64(); num != midBlock.NumberU64() {
-		t.Errorf("head fast-block mismatch: have #%v, want #%v", num, midBlock.NumberU64())
+	if num := ancient.CurrentSnapBlock().Number.Uint64(); num != midBlock.NumberU64() {
+		t.Errorf("head snap-block mismatch: have #%v, want #%v", num, midBlock.NumberU64())
 	}
 	if num := ancient.CurrentHeader().Number.Uint64(); num != midBlock.NumberU64() {
 		t.Errorf("head header mismatch: have #%v, want #%v", num, midBlock.NumberU64())
@@ -1820,7 +1820,7 @@ func TestInsertReceiptChainRollback(t *testing.T) {
 	if _, err := tmpChain.InsertChain(sideblocks); err != nil {
 		t.Fatal("processing side chain failed:", err)
 	}
-	t.Log("sidechain head:", tmpChain.CurrentBlock().Number(), tmpChain.CurrentBlock().Hash())
+	t.Log("sidechain head:", tmpChain.CurrentBlock().Number, tmpChain.CurrentBlock().Hash())
 	sidechainReceipts := make([]types.Receipts, len(sideblocks))
 	for i, block := range sideblocks {
 		sidechainReceipts[i] = tmpChain.GetReceiptsByHash(block.Hash())
@@ -1829,7 +1829,7 @@ func TestInsertReceiptChainRollback(t *testing.T) {
 	if _, err := tmpChain.InsertChain(canonblocks); err != nil {
 		t.Fatal("processing canon chain failed:", err)
 	}
-	t.Log("canon head:", tmpChain.CurrentBlock().Number(), tmpChain.CurrentBlock().Hash())
+	t.Log("canon head:", tmpChain.CurrentBlock().Number, tmpChain.CurrentBlock().Hash())
 	canonReceipts := make([]types.Receipts, len(canonblocks))
 	for i, block := range canonblocks {
 		canonReceipts[i] = tmpChain.GetReceiptsByHash(block.Hash())
@@ -1859,8 +1859,8 @@ func TestInsertReceiptChainRollback(t *testing.T) {
 	if err == nil {
 		t.Fatal("expected error from InsertReceiptChain.")
 	}
-	if ancientChain.CurrentFastBlock().NumberU64() != 0 {
-		t.Fatalf("failed to rollback ancient data, want %d, have %d", 0, ancientChain.CurrentFastBlock().NumberU64())
+	if ancientChain.CurrentSnapBlock().Number.Uint64() != 0 {
+		t.Fatalf("failed to rollback ancient data, want %d, have %d", 0, ancientChain.CurrentSnapBlock().Number)
 	}
 	if frozen, err := ancientChain.db.Ancients(); err != nil || frozen != 1 {
 		t.Fatalf("failed to truncate ancient data, frozen index is %d", frozen)
@@ -1871,7 +1871,7 @@ func TestInsertReceiptChainRollback(t *testing.T) {
 	if err != nil {
 		t.Fatalf("can't import canon chain receipts: %v", err)
 	}
-	if ancientChain.CurrentFastBlock().NumberU64() != canonblocks[len(canonblocks)-1].NumberU64() {
+	if ancientChain.CurrentSnapBlock().Number.Uint64() != canonblocks[len(canonblocks)-1].NumberU64() {
 		t.Fatalf("failed to insert ancient recept chain after rollback")
 	}
 	if frozen, _ := ancientChain.db.Ancients(); frozen != uint64(len(canonblocks))+1 {
@@ -1926,7 +1926,7 @@ func TestLowDiffLongChain(t *testing.T) {
 	}
 	// Sanity check that all the canonical numbers are present
 	header := chain.CurrentHeader()
-	for number := head.NumberU64(); number > 0; number-- {
+	for number := head.Number.Uint64(); number > 0; number-- {
 		if hash := chain.GetHeaderByNumber(number).Hash(); hash != header.Hash() {
 			t.Fatalf("header %d: canonical hash mismatch: have %x, want %x", number, hash, header.Hash())
 		}
@@ -2150,8 +2150,8 @@ func testInsertKnownChainData(t *testing.T, typ string) {
 			return err
 		}
 		asserter = func(t *testing.T, block *types.Block) {
-			if chain.CurrentFastBlock().Hash() != block.Hash() {
-				t.Fatalf("current head fast block mismatch, have %v, want %v", chain.CurrentFastBlock().Hash().Hex(), block.Hash().Hex())
+			if chain.CurrentSnapBlock().Hash() != block.Hash() {
+				t.Fatalf("current head fast block mismatch, have %v, want %v", chain.CurrentSnapBlock().Hash().Hex(), block.Hash().Hex())
 			}
 		}
 	} else {
@@ -2324,8 +2324,8 @@ func testInsertKnownChainDataWithMerging(t *testing.T, typ string, mergeHeight i
 			return err
 		}
 		asserter = func(t *testing.T, block *types.Block) {
-			if chain.CurrentFastBlock().Hash() != block.Hash() {
-				t.Fatalf("current head fast block mismatch, have %v, want %v", chain.CurrentFastBlock().Hash().Hex(), block.Hash().Hex())
+			if chain.CurrentSnapBlock().Hash() != block.Hash() {
+				t.Fatalf("current head fast block mismatch, have %v, want %v", chain.CurrentSnapBlock().Hash().Hex(), block.Hash().Hex())
 			}
 		}
 	} else {
@@ -2452,7 +2452,7 @@ func TestReorgToShorterRemovesCanonMapping(t *testing.T) {
 	if n, err := chain.InsertChain(canonblocks); err != nil {
 		t.Fatalf("block %d: failed to insert into chain: %v", n, err)
 	}
-	canonNum := chain.CurrentBlock().NumberU64()
+	canonNum := chain.CurrentBlock().Number.Uint64()
 	canonHash := chain.CurrentBlock().Hash()
 	_, err = chain.InsertChain(sideblocks)
 	if err != nil {
@@ -2467,7 +2467,7 @@ func TestReorgToShorterRemovesCanonMapping(t *testing.T) {
 		t.Errorf("expected block to be gone: %v", blockByNum.NumberU64())
 	}
 	if headerByNum := chain.GetHeaderByNumber(canonNum); headerByNum != nil {
-		t.Errorf("expected header to be gone: %v", headerByNum.Number.Uint64())
+		t.Errorf("expected header to be gone: %v", headerByNum.Number)
 	}
 	if blockByHash := chain.GetBlockByHash(canonHash); blockByHash == nil {
 		t.Errorf("expected block to be present: %x", blockByHash.Hash())
@@ -2553,7 +2553,7 @@ func TestTransactionIndices(t *testing.T) {
 			t.Fatalf("Oldest indexded block mismatch, want %d, have %d", *tail, *stored)
 		}
 		if tail != nil {
-			for i := *tail; i <= chain.CurrentBlock().NumberU64(); i++ {
+			for i := *tail; i <= chain.CurrentBlock().Number.Uint64(); i++ {
 				block := rawdb.ReadBlock(chain.db, rawdb.ReadCanonicalHash(chain.db, i), i)
 				if block.Transactions().Len() == 0 {
 					continue
@@ -2649,7 +2649,7 @@ func TestSkipStaleTxIndicesInSnapSync(t *testing.T) {
 			t.Fatalf("Oldest indexded block mismatch, want %d, have %d", *tail, *stored)
 		}
 		if tail != nil {
-			for i := *tail; i <= chain.CurrentBlock().NumberU64(); i++ {
+			for i := *tail; i <= chain.CurrentBlock().Number.Uint64(); i++ {
 				block := rawdb.ReadBlock(chain.db, rawdb.ReadCanonicalHash(chain.db, i), i)
 				if block.Transactions().Len() == 0 {
 					continue
@@ -2752,7 +2752,8 @@ func benchmarkLargeNumberOfValueToNonexisting(b *testing.B, numTxs, numBlocks in
 			b.Fatalf("failed to insert shared chain: %v", err)
 		}
 		b.StopTimer()
-		if got := chain.CurrentBlock().Transactions().Len(); got != numTxs*numBlocks {
+		block := chain.GetBlockByHash(chain.CurrentBlock().Hash())
+		if got := block.Transactions().Len(); got != numTxs*numBlocks {
 			b.Fatalf("Transactions were not included, expected %d, got %d", numTxs*numBlocks, got)
 		}
 	}
@@ -3715,8 +3716,8 @@ func TestSetCanonical(t *testing.T) {
 		if chain.CurrentBlock().Hash() != head.Hash() {
 			t.Fatalf("Unexpected block hash, want %x, got %x", head.Hash(), chain.CurrentBlock().Hash())
 		}
-		if chain.CurrentFastBlock().Hash() != head.Hash() {
-			t.Fatalf("Unexpected fast block hash, want %x, got %x", head.Hash(), chain.CurrentFastBlock().Hash())
+		if chain.CurrentSnapBlock().Hash() != head.Hash() {
+			t.Fatalf("Unexpected fast block hash, want %x, got %x", head.Hash(), chain.CurrentSnapBlock().Hash())
 		}
 		if chain.CurrentHeader().Hash() != head.Hash() {
 			t.Fatalf("Unexpected head header, want %x, got %x", head.Hash(), chain.CurrentHeader().Hash())
@@ -3799,8 +3800,8 @@ func TestCanonicalHashMarker(t *testing.T) {
 			if chain.CurrentBlock().Hash() != head.Hash() {
 				t.Fatalf("Unexpected block hash, want %x, got %x", head.Hash(), chain.CurrentBlock().Hash())
 			}
-			if chain.CurrentFastBlock().Hash() != head.Hash() {
-				t.Fatalf("Unexpected fast block hash, want %x, got %x", head.Hash(), chain.CurrentFastBlock().Hash())
+			if chain.CurrentSnapBlock().Hash() != head.Hash() {
+				t.Fatalf("Unexpected fast block hash, want %x, got %x", head.Hash(), chain.CurrentSnapBlock().Hash())
 			}
 			if chain.CurrentHeader().Hash() != head.Hash() {
 				t.Fatalf("Unexpected head header, want %x, got %x", head.Hash(), chain.CurrentHeader().Hash())
diff --git a/core/chain_makers_test.go b/core/chain_makers_test.go
index 7e895a8d2057..6c4e0914362e 100644
--- a/core/chain_makers_test.go
+++ b/core/chain_makers_test.go
@@ -197,7 +197,7 @@ func ExampleGenerateChain() {
 	}
 
 	state, _ := blockchain.State()
-	fmt.Printf("last block: #%d\n", blockchain.CurrentBlock().Number())
+	fmt.Printf("last block: #%d\n", blockchain.CurrentBlock().Number)
 	fmt.Println("balance of addr1:", state.GetBalance(addr1))
 	fmt.Println("balance of addr2:", state.GetBalance(addr2))
 	fmt.Println("balance of addr3:", state.GetBalance(addr3))
diff --git a/core/dao_test.go b/core/dao_test.go
index 4ae86b50ff1f..f2e8dfe8f9aa 100644
--- a/core/dao_test.go
+++ b/core/dao_test.go
@@ -76,7 +76,7 @@ func TestDAOForkRangeExtradata(t *testing.T) {
 		// Create a pro-fork block, and try to feed into the no-fork chain
 		bc, _ := NewBlockChain(rawdb.NewMemoryDatabase(), nil, congspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
 
-		blocks := conBc.GetBlocksFromHash(conBc.CurrentBlock().Hash(), int(conBc.CurrentBlock().NumberU64()))
+		blocks := conBc.GetBlocksFromHash(conBc.CurrentBlock().Hash(), int(conBc.CurrentBlock().Number.Uint64()))
 		for j := 0; j < len(blocks)/2; j++ {
 			blocks[j], blocks[len(blocks)-1-j] = blocks[len(blocks)-1-j], blocks[j]
 		}
@@ -87,19 +87,19 @@ func TestDAOForkRangeExtradata(t *testing.T) {
 			t.Fatalf("failed to commit contra-fork head for expansion: %v", err)
 		}
 		bc.Stop()
-		blocks, _ = GenerateChain(&proConf, conBc.CurrentBlock(), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
+		blocks, _ = GenerateChain(&proConf, conBc.GetBlockByHash(conBc.CurrentBlock().Hash()), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
 		if _, err := conBc.InsertChain(blocks); err == nil {
 			t.Fatalf("contra-fork chain accepted pro-fork block: %v", blocks[0])
 		}
 		// Create a proper no-fork block for the contra-forker
-		blocks, _ = GenerateChain(&conConf, conBc.CurrentBlock(), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
+		blocks, _ = GenerateChain(&conConf, conBc.GetBlockByHash(conBc.CurrentBlock().Hash()), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
 		if _, err := conBc.InsertChain(blocks); err != nil {
 			t.Fatalf("contra-fork chain didn't accepted no-fork block: %v", err)
 		}
 		// Create a no-fork block, and try to feed into the pro-fork chain
 		bc, _ = NewBlockChain(rawdb.NewMemoryDatabase(), nil, progspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
 
-		blocks = proBc.GetBlocksFromHash(proBc.CurrentBlock().Hash(), int(proBc.CurrentBlock().NumberU64()))
+		blocks = proBc.GetBlocksFromHash(proBc.CurrentBlock().Hash(), int(proBc.CurrentBlock().Number.Uint64()))
 		for j := 0; j < len(blocks)/2; j++ {
 			blocks[j], blocks[len(blocks)-1-j] = blocks[len(blocks)-1-j], blocks[j]
 		}
@@ -110,12 +110,12 @@ func TestDAOForkRangeExtradata(t *testing.T) {
 			t.Fatalf("failed to commit pro-fork head for expansion: %v", err)
 		}
 		bc.Stop()
-		blocks, _ = GenerateChain(&conConf, proBc.CurrentBlock(), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
+		blocks, _ = GenerateChain(&conConf, proBc.GetBlockByHash(proBc.CurrentBlock().Hash()), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
 		if _, err := proBc.InsertChain(blocks); err == nil {
 			t.Fatalf("pro-fork chain accepted contra-fork block: %v", blocks[0])
 		}
 		// Create a proper pro-fork block for the pro-forker
-		blocks, _ = GenerateChain(&proConf, proBc.CurrentBlock(), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
+		blocks, _ = GenerateChain(&proConf, proBc.GetBlockByHash(proBc.CurrentBlock().Hash()), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
 		if _, err := proBc.InsertChain(blocks); err != nil {
 			t.Fatalf("pro-fork chain didn't accepted pro-fork block: %v", err)
 		}
@@ -124,7 +124,7 @@ func TestDAOForkRangeExtradata(t *testing.T) {
 	bc, _ := NewBlockChain(rawdb.NewMemoryDatabase(), nil, congspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
 	defer bc.Stop()
 
-	blocks := conBc.GetBlocksFromHash(conBc.CurrentBlock().Hash(), int(conBc.CurrentBlock().NumberU64()))
+	blocks := conBc.GetBlocksFromHash(conBc.CurrentBlock().Hash(), int(conBc.CurrentBlock().Number.Uint64()))
 	for j := 0; j < len(blocks)/2; j++ {
 		blocks[j], blocks[len(blocks)-1-j] = blocks[len(blocks)-1-j], blocks[j]
 	}
@@ -134,7 +134,7 @@ func TestDAOForkRangeExtradata(t *testing.T) {
 	if err := bc.stateCache.TrieDB().Commit(bc.CurrentHeader().Root, false); err != nil {
 		t.Fatalf("failed to commit contra-fork head for expansion: %v", err)
 	}
-	blocks, _ = GenerateChain(&proConf, conBc.CurrentBlock(), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
+	blocks, _ = GenerateChain(&proConf, conBc.GetBlockByHash(conBc.CurrentBlock().Hash()), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
 	if _, err := conBc.InsertChain(blocks); err != nil {
 		t.Fatalf("contra-fork chain didn't accept pro-fork block post-fork: %v", err)
 	}
@@ -142,7 +142,7 @@ func TestDAOForkRangeExtradata(t *testing.T) {
 	bc, _ = NewBlockChain(rawdb.NewMemoryDatabase(), nil, progspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
 	defer bc.Stop()
 
-	blocks = proBc.GetBlocksFromHash(proBc.CurrentBlock().Hash(), int(proBc.CurrentBlock().NumberU64()))
+	blocks = proBc.GetBlocksFromHash(proBc.CurrentBlock().Hash(), int(proBc.CurrentBlock().Number.Uint64()))
 	for j := 0; j < len(blocks)/2; j++ {
 		blocks[j], blocks[len(blocks)-1-j] = blocks[len(blocks)-1-j], blocks[j]
 	}
@@ -152,7 +152,7 @@ func TestDAOForkRangeExtradata(t *testing.T) {
 	if err := bc.stateCache.TrieDB().Commit(bc.CurrentHeader().Root, false); err != nil {
 		t.Fatalf("failed to commit pro-fork head for expansion: %v", err)
 	}
-	blocks, _ = GenerateChain(&conConf, proBc.CurrentBlock(), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
+	blocks, _ = GenerateChain(&conConf, proBc.GetBlockByHash(proBc.CurrentBlock().Hash()), ethash.NewFaker(), genDb, 1, func(i int, gen *BlockGen) {})
 	if _, err := proBc.InsertChain(blocks); err != nil {
 		t.Fatalf("pro-fork chain didn't accept contra-fork block post-fork: %v", err)
 	}
diff --git a/core/txpool/txpool.go b/core/txpool/txpool.go
index c80520186627..762210b7b74a 100644
--- a/core/txpool/txpool.go
+++ b/core/txpool/txpool.go
@@ -145,7 +145,7 @@ const (
 // blockChain provides the state of blockchain and current gas limit to do
 // some pre checks in tx pool and event subscribers.
 type blockChain interface {
-	CurrentBlock() *types.Block
+	CurrentBlock() *types.Header
 	GetBlock(hash common.Hash, number uint64) *types.Block
 	StateAt(root common.Hash) (*state.StateDB, error)
 
@@ -309,7 +309,7 @@ func NewTxPool(config Config, chainconfig *params.ChainConfig, chain blockChain)
 		pool.locals.add(addr)
 	}
 	pool.priced = newPricedList(pool.all)
-	pool.reset(nil, chain.CurrentBlock().Header())
+	pool.reset(nil, chain.CurrentBlock())
 
 	// Start the reorg loop early so it can handle requests generated during journal loading.
 	pool.wg.Add(1)
@@ -361,8 +361,8 @@ func (pool *TxPool) loop() {
 		// Handle ChainHeadEvent
 		case ev := <-pool.chainHeadCh:
 			if ev.Block != nil {
-				pool.requestReset(head.Header(), ev.Block.Header())
-				head = ev.Block
+				pool.requestReset(head, ev.Block.Header())
+				head = ev.Block.Header()
 			}
 
 		// System shutdown.
@@ -1291,7 +1291,7 @@ func (pool *TxPool) reset(oldHead, newHead *types.Header) {
 	}
 	// Initialize the internal state to the current head
 	if newHead == nil {
-		newHead = pool.chain.CurrentBlock().Header() // Special case during testing
+		newHead = pool.chain.CurrentBlock() // Special case during testing
 	}
 	statedb, err := pool.chain.StateAt(newHead.Root)
 	if err != nil {
diff --git a/core/txpool/txpool_test.go b/core/txpool/txpool_test.go
index bd82622f8de6..237f97afe434 100644
--- a/core/txpool/txpool_test.go
+++ b/core/txpool/txpool_test.go
@@ -64,14 +64,15 @@ type testBlockChain struct {
 	chainHeadFeed *event.Feed
 }
 
-func (bc *testBlockChain) CurrentBlock() *types.Block {
-	return types.NewBlock(&types.Header{
+func (bc *testBlockChain) CurrentBlock() *types.Header {
+	return &types.Header{
+		Number:   new(big.Int),
 		GasLimit: atomic.LoadUint64(&bc.gasLimit),
-	}, nil, nil, nil, trie.NewStackTrie(nil))
+	}
 }
 
 func (bc *testBlockChain) GetBlock(hash common.Hash, number uint64) *types.Block {
-	return bc.CurrentBlock()
+	return types.NewBlock(bc.CurrentBlock(), nil, nil, nil, trie.NewStackTrie(nil))
 }
 
 func (bc *testBlockChain) StateAt(common.Hash) (*state.StateDB, error) {
diff --git a/eth/api.go b/eth/api.go
index ceed85ef576b..cd6510ccf9a2 100644
--- a/eth/api.go
+++ b/eth/api.go
@@ -267,20 +267,24 @@ func (api *DebugAPI) DumpBlock(blockNr rpc.BlockNumber) (state.Dump, error) {
 		_, stateDb := api.eth.miner.Pending()
 		return stateDb.RawDump(opts), nil
 	}
-	var block *types.Block
+	var header *types.Header
 	if blockNr == rpc.LatestBlockNumber {
-		block = api.eth.blockchain.CurrentBlock()
+		header = api.eth.blockchain.CurrentBlock()
 	} else if blockNr == rpc.FinalizedBlockNumber {
-		block = api.eth.blockchain.CurrentFinalizedBlock()
+		header = api.eth.blockchain.CurrentFinalBlock()
 	} else if blockNr == rpc.SafeBlockNumber {
-		block = api.eth.blockchain.CurrentSafeBlock()
+		header = api.eth.blockchain.CurrentSafeBlock()
 	} else {
-		block = api.eth.blockchain.GetBlockByNumber(uint64(blockNr))
+		block := api.eth.blockchain.GetBlockByNumber(uint64(blockNr))
+		if block == nil {
+			return state.Dump{}, fmt.Errorf("block #%d not found", blockNr)
+		}
+		header = block.Header()
 	}
-	if block == nil {
+	if header == nil {
 		return state.Dump{}, fmt.Errorf("block #%d not found", blockNr)
 	}
-	stateDb, err := api.eth.BlockChain().StateAt(block.Root())
+	stateDb, err := api.eth.BlockChain().StateAt(header.Root)
 	if err != nil {
 		return state.Dump{}, err
 	}
@@ -347,20 +351,24 @@ func (api *DebugAPI) AccountRange(blockNrOrHash rpc.BlockNumberOrHash, start hex
 			// the miner and operate on those
 			_, stateDb = api.eth.miner.Pending()
 		} else {
-			var block *types.Block
+			var header *types.Header
 			if number == rpc.LatestBlockNumber {
-				block = api.eth.blockchain.CurrentBlock()
+				header = api.eth.blockchain.CurrentBlock()
 			} else if number == rpc.FinalizedBlockNumber {
-				block = api.eth.blockchain.CurrentFinalizedBlock()
+				header = api.eth.blockchain.CurrentFinalBlock()
 			} else if number == rpc.SafeBlockNumber {
-				block = api.eth.blockchain.CurrentSafeBlock()
+				header = api.eth.blockchain.CurrentSafeBlock()
 			} else {
-				block = api.eth.blockchain.GetBlockByNumber(uint64(number))
+				block := api.eth.blockchain.GetBlockByNumber(uint64(number))
+				if block == nil {
+					return state.IteratorDump{}, fmt.Errorf("block #%d not found", number)
+				}
+				header = block.Header()
 			}
-			if block == nil {
+			if header == nil {
 				return state.IteratorDump{}, fmt.Errorf("block #%d not found", number)
 			}
-			stateDb, err = api.eth.BlockChain().StateAt(block.Root())
+			stateDb, err = api.eth.BlockChain().StateAt(header.Root)
 			if err != nil {
 				return state.IteratorDump{}, err
 			}
@@ -552,7 +560,7 @@ func (api *DebugAPI) GetAccessibleState(from, to rpc.BlockNumber) (uint64, error
 			if block == nil {
 				return 0, fmt.Errorf("current block missing")
 			}
-			return block.NumberU64(), nil
+			return block.Number.Uint64(), nil
 		}
 		return uint64(num.Int64()), nil
 	}
diff --git a/eth/api_backend.go b/eth/api_backend.go
index 8fd3e43300d3..e7daea2f6cdb 100644
--- a/eth/api_backend.go
+++ b/eth/api_backend.go
@@ -55,7 +55,7 @@ func (b *EthAPIBackend) ChainConfig() *params.ChainConfig {
 	return b.eth.blockchain.Config()
 }
 
-func (b *EthAPIBackend) CurrentBlock() *types.Block {
+func (b *EthAPIBackend) CurrentBlock() *types.Header {
 	return b.eth.blockchain.CurrentBlock()
 }
 
@@ -72,19 +72,19 @@ func (b *EthAPIBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumb
 	}
 	// Otherwise resolve and return the block
 	if number == rpc.LatestBlockNumber {
-		return b.eth.blockchain.CurrentBlock().Header(), nil
+		return b.eth.blockchain.CurrentBlock(), nil
 	}
 	if number == rpc.FinalizedBlockNumber {
-		block := b.eth.blockchain.CurrentFinalizedBlock()
+		block := b.eth.blockchain.CurrentFinalBlock()
 		if block != nil {
-			return block.Header(), nil
+			return block, nil
 		}
 		return nil, errors.New("finalized block not found")
 	}
 	if number == rpc.SafeBlockNumber {
 		block := b.eth.blockchain.CurrentSafeBlock()
 		if block != nil {
-			return block.Header(), nil
+			return block, nil
 		}
 		return nil, errors.New("safe block not found")
 	}
@@ -120,13 +120,16 @@ func (b *EthAPIBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumbe
 	}
 	// Otherwise resolve and return the block
 	if number == rpc.LatestBlockNumber {
-		return b.eth.blockchain.CurrentBlock(), nil
+		header := b.eth.blockchain.CurrentBlock()
+		return b.eth.blockchain.GetBlock(header.Hash(), header.Number.Uint64()), nil
 	}
 	if number == rpc.FinalizedBlockNumber {
-		return b.eth.blockchain.CurrentFinalizedBlock(), nil
+		header := b.eth.blockchain.CurrentFinalBlock()
+		return b.eth.blockchain.GetBlock(header.Hash(), header.Number.Uint64()), nil
 	}
 	if number == rpc.SafeBlockNumber {
-		return b.eth.blockchain.CurrentSafeBlock(), nil
+		header := b.eth.blockchain.CurrentSafeBlock()
+		return b.eth.blockchain.GetBlock(header.Hash(), header.Number.Uint64()), nil
 	}
 	return b.eth.blockchain.GetBlockByNumber(uint64(number)), nil
 }
diff --git a/eth/catalyst/api.go b/eth/catalyst/api.go
index 2c7494c7de30..fc7529c8f5d7 100644
--- a/eth/catalyst/api.go
+++ b/eth/catalyst/api.go
@@ -301,7 +301,7 @@ func (api *ConsensusAPI) forkchoiceUpdated(update engine.ForkchoiceStateV1, payl
 	} else {
 		// If the head block is already in our canonical chain, the beacon client is
 		// probably resyncing. Ignore the update.
-		log.Info("Ignoring beacon update to old head", "number", block.NumberU64(), "hash", update.HeadBlockHash, "age", common.PrettyAge(time.Unix(int64(block.Time()), 0)), "have", api.eth.BlockChain().CurrentBlock().NumberU64())
+		log.Info("Ignoring beacon update to old head", "number", block.NumberU64(), "hash", update.HeadBlockHash, "age", common.PrettyAge(time.Unix(int64(block.Time()), 0)), "have", api.eth.BlockChain().CurrentBlock().Number)
 		return valid(nil), nil
 	}
 	api.eth.SetSynced()
@@ -322,7 +322,7 @@ func (api *ConsensusAPI) forkchoiceUpdated(update engine.ForkchoiceStateV1, payl
 			return engine.STATUS_INVALID, engine.InvalidForkChoiceState.With(errors.New("final block not in canonical chain"))
 		}
 		// Set the finalized block
-		api.eth.BlockChain().SetFinalized(finalBlock)
+		api.eth.BlockChain().SetFinalized(finalBlock.Header())
 	}
 	// Check if the safe block hash is in our canonical tree, if not somethings wrong
 	if update.SafeBlockHash != (common.Hash{}) {
@@ -336,7 +336,7 @@ func (api *ConsensusAPI) forkchoiceUpdated(update engine.ForkchoiceStateV1, payl
 			return engine.STATUS_INVALID, engine.InvalidForkChoiceState.With(errors.New("safe block not in canonical chain"))
 		}
 		// Set the safe block
-		api.eth.BlockChain().SetSafe(safeBlock)
+		api.eth.BlockChain().SetSafe(safeBlock.Header())
 	}
 	// If payload generation was requested, create a new block to be potentially
 	// sealed by the beacon client. The payload will be requested later, and we
@@ -804,7 +804,7 @@ func (api *ConsensusAPI) GetPayloadBodiesByRangeV1(start, count hexutil.Uint64)
 		return nil, engine.TooLargeRequest.With(fmt.Errorf("requested count too large: %v", count))
 	}
 	// limit count up until current
-	current := api.eth.BlockChain().CurrentBlock().NumberU64()
+	current := api.eth.BlockChain().CurrentBlock().Number.Uint64()
 	last := uint64(start) + uint64(count) - 1
 	if last > current {
 		last = current
diff --git a/eth/catalyst/api_test.go b/eth/catalyst/api_test.go
index 4dc0c0ea7ea9..f1af087cf00a 100644
--- a/eth/catalyst/api_test.go
+++ b/eth/catalyst/api_test.go
@@ -248,8 +248,8 @@ func TestInvalidPayloadTimestamp(t *testing.T) {
 		shouldErr bool
 	}{
 		{0, true},
-		{parent.Time(), true},
-		{parent.Time() - 1, true},
+		{parent.Time, true},
+		{parent.Time - 1, true},
 
 		// TODO (MariusVanDerWijden) following tests are currently broken,
 		// fixed in upcoming merge-kiln-v2 pr
@@ -262,7 +262,7 @@ func TestInvalidPayloadTimestamp(t *testing.T) {
 			params := engine.PayloadAttributes{
 				Timestamp:             test.time,
 				Random:                crypto.Keccak256Hash([]byte{byte(123)}),
-				SuggestedFeeRecipient: parent.Coinbase(),
+				SuggestedFeeRecipient: parent.Coinbase,
 			}
 			fcState := engine.ForkchoiceStateV1{
 				HeadBlockHash:      parent.Hash(),
@@ -319,7 +319,7 @@ func TestEth2NewBlock(t *testing.T) {
 			t.Fatalf("Failed to insert block: %v", err)
 		case newResp.Status != "VALID":
 			t.Fatalf("Failed to insert block: %v", newResp.Status)
-		case ethservice.BlockChain().CurrentBlock().NumberU64() != block.NumberU64()-1:
+		case ethservice.BlockChain().CurrentBlock().Number.Uint64() != block.NumberU64()-1:
 			t.Fatalf("Chain head shouldn't be updated")
 		}
 		checkLogEvents(t, newLogCh, rmLogsCh, 0, 0)
@@ -331,7 +331,7 @@ func TestEth2NewBlock(t *testing.T) {
 		if _, err := api.ForkchoiceUpdatedV1(fcState, nil); err != nil {
 			t.Fatalf("Failed to insert block: %v", err)
 		}
-		if have, want := ethservice.BlockChain().CurrentBlock().NumberU64(), block.NumberU64(); have != want {
+		if have, want := ethservice.BlockChain().CurrentBlock().Number.Uint64(), block.NumberU64(); have != want {
 			t.Fatalf("Chain head should be updated, have %d want %d", have, want)
 		}
 		checkLogEvents(t, newLogCh, rmLogsCh, 1, 0)
@@ -341,7 +341,7 @@ func TestEth2NewBlock(t *testing.T) {
 
 	// Introduce fork chain
 	var (
-		head = ethservice.BlockChain().CurrentBlock().NumberU64()
+		head = ethservice.BlockChain().CurrentBlock().Number.Uint64()
 	)
 	parent = preMergeBlocks[len(preMergeBlocks)-1]
 	for i := 0; i < 10; i++ {
@@ -359,7 +359,7 @@ func TestEth2NewBlock(t *testing.T) {
 		if err != nil || newResp.Status != "VALID" {
 			t.Fatalf("Failed to insert block: %v", err)
 		}
-		if ethservice.BlockChain().CurrentBlock().NumberU64() != head {
+		if ethservice.BlockChain().CurrentBlock().Number.Uint64() != head {
 			t.Fatalf("Chain head shouldn't be updated")
 		}
 
@@ -371,7 +371,7 @@ func TestEth2NewBlock(t *testing.T) {
 		if _, err := api.ForkchoiceUpdatedV1(fcState, nil); err != nil {
 			t.Fatalf("Failed to insert block: %v", err)
 		}
-		if ethservice.BlockChain().CurrentBlock().NumberU64() != block.NumberU64() {
+		if ethservice.BlockChain().CurrentBlock().Number.Uint64() != block.NumberU64() {
 			t.Fatalf("Chain head should be updated")
 		}
 		parent, head = block, block.NumberU64()
@@ -389,7 +389,7 @@ func TestEth2DeepReorg(t *testing.T) {
 		var (
 			api    = NewConsensusAPI(ethservice, nil)
 			parent = preMergeBlocks[len(preMergeBlocks)-core.TriesInMemory-1]
-			head   = ethservice.BlockChain().CurrentBlock().NumberU64()
+			head   = ethservice.BlockChain().CurrentBlock().Number.Uint64()()
 		)
 		if ethservice.BlockChain().HasBlockAndState(parent.Hash(), parent.NumberU64()) {
 			t.Errorf("Block %d not pruned", parent.NumberU64())
@@ -410,13 +410,13 @@ func TestEth2DeepReorg(t *testing.T) {
 			if err != nil || newResp.Status != "VALID" {
 				t.Fatalf("Failed to insert block: %v", err)
 			}
-			if ethservice.BlockChain().CurrentBlock().NumberU64() != head {
+			if ethservice.BlockChain().CurrentBlock().Number.Uint64()() != head {
 				t.Fatalf("Chain head shouldn't be updated")
 			}
 			if err := api.setHead(block.Hash()); err != nil {
 				t.Fatalf("Failed to set head: %v", err)
 			}
-			if ethservice.BlockChain().CurrentBlock().NumberU64() != block.NumberU64() {
+			if ethservice.BlockChain().CurrentBlock().Number.Uint64()() != block.NumberU64() {
 				t.Fatalf("Chain head should be updated")
 			}
 			parent, head = block, block.NumberU64()
@@ -466,8 +466,8 @@ func TestFullAPI(t *testing.T) {
 		logCode = common.Hex2Bytes("60606040525b7f24ec1d3ff24c2f6ff210738839dbc339cd45a5294d85c79361016243157aae7b60405180905060405180910390a15b600a8060416000396000f360606040526008565b00")
 	)
 
-	callback := func(parent *types.Block) {
-		statedb, _ := ethservice.BlockChain().StateAt(parent.Root())
+	callback := func(parent *types.Header) {
+		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)
@@ -476,9 +476,9 @@ func TestFullAPI(t *testing.T) {
 	setupBlocks(t, ethservice, 10, parent, callback)
 }
 
-func setupBlocks(t *testing.T, ethservice *eth.Ethereum, n int, parent *types.Block, callback func(parent *types.Block)) []*types.Block {
+func setupBlocks(t *testing.T, ethservice *eth.Ethereum, n int, parent *types.Header, callback func(parent *types.Header)) []*types.Header {
 	api := NewConsensusAPI(ethservice)
-	var blocks []*types.Block
+	var blocks []*types.Header
 	for i := 0; i < n; i++ {
 		callback(parent)
 
@@ -499,10 +499,10 @@ func setupBlocks(t *testing.T, ethservice *eth.Ethereum, n int, parent *types.Bl
 		if _, err := api.ForkchoiceUpdatedV1(fcState, nil); err != nil {
 			t.Fatalf("Failed to insert block: %v", err)
 		}
-		if ethservice.BlockChain().CurrentBlock().NumberU64() != payload.Number {
+		if ethservice.BlockChain().CurrentBlock().Number.Uint64() != payload.Number {
 			t.Fatal("Chain head should be updated")
 		}
-		if ethservice.BlockChain().CurrentFinalizedBlock().NumberU64() != payload.Number-1 {
+		if ethservice.BlockChain().CurrentFinalBlock().Number.Uint64() != payload.Number-1 {
 			t.Fatal("Finalized block should be updated")
 		}
 		parent = ethservice.BlockChain().CurrentBlock()
@@ -585,7 +585,7 @@ func TestNewPayloadOnInvalidChain(t *testing.T) {
 		logCode = common.Hex2Bytes("60606040525b7f24ec1d3ff24c2f6ff210738839dbc339cd45a5294d85c79361016243157aae7b60405180905060405180910390a15b600a8060416000396000f360606040526008565b00")
 	)
 	for i := 0; i < 10; i++ {
-		statedb, _ := ethservice.BlockChain().StateAt(parent.Root())
+		statedb, _ := ethservice.BlockChain().StateAt(parent.Root)
 		tx := types.MustSignNewTx(testKey, signer, &types.LegacyTx{
 			Nonce:    statedb.GetNonce(testAddr),
 			Value:    new(big.Int),
@@ -596,9 +596,9 @@ func TestNewPayloadOnInvalidChain(t *testing.T) {
 		ethservice.TxPool().AddRemotesSync([]*types.Transaction{tx})
 		var (
 			params = engine.PayloadAttributes{
-				Timestamp:             parent.Time() + 1,
+				Timestamp:             parent.Time + 1,
 				Random:                crypto.Keccak256Hash([]byte{byte(i)}),
-				SuggestedFeeRecipient: parent.Coinbase(),
+				SuggestedFeeRecipient: parent.Coinbase,
 			}
 			fcState = engine.ForkchoiceStateV1{
 				HeadBlockHash:      parent.Hash(),
@@ -645,7 +645,7 @@ func TestNewPayloadOnInvalidChain(t *testing.T) {
 		if _, err := api.ForkchoiceUpdatedV1(fcState, nil); err != nil {
 			t.Fatalf("Failed to insert block: %v", err)
 		}
-		if ethservice.BlockChain().CurrentBlock().NumberU64() != payload.Number {
+		if ethservice.BlockChain().CurrentBlock().Number.Uint64() != payload.Number {
 			t.Fatalf("Chain head should be updated")
 		}
 		parent = ethservice.BlockChain().CurrentBlock()
@@ -676,7 +676,7 @@ func TestEmptyBlocks(t *testing.T) {
 	api := NewConsensusAPI(ethservice)
 
 	// Setup 10 blocks on the canonical chain
-	setupBlocks(t, ethservice, 10, commonAncestor, func(parent *types.Block) {})
+	setupBlocks(t, ethservice, 10, commonAncestor, func(parent *types.Header) {})
 
 	// (1) check LatestValidHash by sending a normal payload (P1'')
 	payload := getNewPayload(t, api, commonAncestor)
@@ -727,11 +727,11 @@ func TestEmptyBlocks(t *testing.T) {
 	}
 }
 
-func getNewPayload(t *testing.T, api *ConsensusAPI, parent *types.Block) *engine.ExecutableData {
+func getNewPayload(t *testing.T, api *ConsensusAPI, parent *types.Header) *engine.ExecutableData {
 	params := engine.PayloadAttributes{
-		Timestamp:             parent.Time() + 1,
+		Timestamp:             parent.Time + 1,
 		Random:                crypto.Keccak256Hash([]byte{byte(1)}),
-		SuggestedFeeRecipient: parent.Coinbase(),
+		SuggestedFeeRecipient: parent.Coinbase,
 	}
 
 	payload, err := assembleBlock(api, parent.Hash(), &params)
@@ -799,7 +799,7 @@ func TestTrickRemoteBlockCache(t *testing.T) {
 	commonAncestor := ethserviceA.BlockChain().CurrentBlock()
 
 	// Setup 10 blocks on the canonical chain
-	setupBlocks(t, ethserviceA, 10, commonAncestor, func(parent *types.Block) {})
+	setupBlocks(t, ethserviceA, 10, commonAncestor, func(parent *types.Header) {})
 	commonAncestor = ethserviceA.BlockChain().CurrentBlock()
 
 	var invalidChain []*engine.ExecutableData
@@ -855,7 +855,7 @@ func TestInvalidBloom(t *testing.T) {
 	api := NewConsensusAPI(ethservice)
 
 	// Setup 10 blocks on the canonical chain
-	setupBlocks(t, ethservice, 10, commonAncestor, func(parent *types.Block) {})
+	setupBlocks(t, ethservice, 10, commonAncestor, func(parent *types.Header) {})
 
 	// (1) check LatestValidHash by sending a normal payload (P1'')
 	payload := getNewPayload(t, api, commonAncestor)
@@ -966,7 +966,7 @@ func TestSimultaneousNewBlock(t *testing.T) {
 		if err != nil {
 			t.Fatalf("Failed to convert executable data to block %v", err)
 		}
-		if ethservice.BlockChain().CurrentBlock().NumberU64() != block.NumberU64()-1 {
+		if ethservice.BlockChain().CurrentBlock().Number.Uint64() != block.NumberU64()-1 {
 			t.Fatalf("Chain head shouldn't be updated")
 		}
 		fcState := engine.ForkchoiceStateV1{
@@ -997,7 +997,7 @@ func TestSimultaneousNewBlock(t *testing.T) {
 				t.Fatal(testErr)
 			}
 		}
-		if have, want := ethservice.BlockChain().CurrentBlock().NumberU64(), block.NumberU64(); have != want {
+		if have, want := ethservice.BlockChain().CurrentBlock().Number.Uint64(), block.NumberU64(); have != want {
 			t.Fatalf("Chain head should be updated, have %d want %d", have, want)
 		}
 		parent = block
@@ -1242,14 +1242,18 @@ func setupBodies(t *testing.T) (*node.Node, *eth.Ethereum, []*types.Block) {
 		logCode = common.Hex2Bytes("60606040525b7f24ec1d3ff24c2f6ff210738839dbc339cd45a5294d85c79361016243157aae7b60405180905060405180910390a15b600a8060416000396000f360606040526008565b00")
 	)
 
-	callback := func(parent *types.Block) {
-		statedb, _ := ethservice.BlockChain().StateAt(parent.Root())
+	callback := func(parent *types.Header) {
+		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)
 	}
 
-	postMergeBlocks := setupBlocks(t, ethservice, 10, parent, callback)
+	postMergeHeaders := setupBlocks(t, ethservice, 10, parent, callback)
+	postMergeBlocks := make([]*types.Block, len(postMergeHeaders))
+	for i, header := range postMergeHeaders {
+		postMergeBlocks[i] = ethservice.BlockChain().GetBlock(header.Hash(), header.Number.Uint64())
+	}
 	return n, ethservice, append(preMergeBlocks, postMergeBlocks...)
 }
 
diff --git a/eth/downloader/beaconsync.go b/eth/downloader/beaconsync.go
index c539474c64dd..ff985e6b035f 100644
--- a/eth/downloader/beaconsync.go
+++ b/eth/downloader/beaconsync.go
@@ -76,7 +76,7 @@ func (b *beaconBackfiller) suspend() *types.Header {
 
 	// Sync cycle was just terminated, retrieve and return the last filled header.
 	// Can't use `filled` as that contains a stale value from before cancellation.
-	return b.downloader.blockchain.CurrentFastBlock().Header()
+	return b.downloader.blockchain.CurrentSnapBlock()
 }
 
 // resume starts the downloader threads for backfilling state and chain data.
@@ -101,7 +101,7 @@ func (b *beaconBackfiller) resume() {
 		defer func() {
 			b.lock.Lock()
 			b.filling = false
-			b.filled = b.downloader.blockchain.CurrentFastBlock().Header()
+			b.filled = b.downloader.blockchain.CurrentSnapBlock()
 			b.lock.Unlock()
 		}()
 		// If the downloader fails, report an error as in beacon chain mode there
@@ -198,9 +198,9 @@ func (d *Downloader) findBeaconAncestor() (uint64, error) {
 
 	switch d.getMode() {
 	case FullSync:
-		chainHead = d.blockchain.CurrentBlock().Header()
+		chainHead = d.blockchain.CurrentBlock()
 	case SnapSync:
-		chainHead = d.blockchain.CurrentFastBlock().Header()
+		chainHead = d.blockchain.CurrentSnapBlock()
 	default:
 		chainHead = d.lightchain.CurrentHeader()
 	}
diff --git a/eth/downloader/downloader.go b/eth/downloader/downloader.go
index ec9cce2eb621..fb9de79912e2 100644
--- a/eth/downloader/downloader.go
+++ b/eth/downloader/downloader.go
@@ -196,10 +196,10 @@ type BlockChain interface {
 	GetBlockByHash(common.Hash) *types.Block
 
 	// CurrentBlock retrieves the head block from the local chain.
-	CurrentBlock() *types.Block
+	CurrentBlock() *types.Header
 
-	// CurrentFastBlock retrieves the head snap block from the local chain.
-	CurrentFastBlock() *types.Block
+	// CurrentSnapBlock retrieves the head snap block from the local chain.
+	CurrentSnapBlock() *types.Header
 
 	// SnapSyncCommitHead directly commits the head block to a certain entity.
 	SnapSyncCommitHead(common.Hash) error
@@ -236,7 +236,7 @@ func New(checkpoint uint64, stateDb ethdb.Database, mux *event.TypeMux, chain Bl
 		quitCh:         make(chan struct{}),
 		SnapSyncer:     snap.NewSyncer(stateDb, chain.TrieDB().Scheme()),
 		stateSyncStart: make(chan *stateSync),
-		syncStartBlock: chain.CurrentFastBlock().NumberU64(),
+		syncStartBlock: chain.CurrentSnapBlock().Number.Uint64(),
 	}
 	// Create the post-merge skeleton syncer and start the process
 	dl.skeleton = newSkeleton(stateDb, dl.peers, dropPeer, newBeaconBackfiller(dl, success))
@@ -261,9 +261,9 @@ func (d *Downloader) Progress() ethereum.SyncProgress {
 	mode := d.getMode()
 	switch {
 	case d.blockchain != nil && mode == FullSync:
-		current = d.blockchain.CurrentBlock().NumberU64()
+		current = d.blockchain.CurrentBlock().Number.Uint64()
 	case d.blockchain != nil && mode == SnapSync:
-		current = d.blockchain.CurrentFastBlock().NumberU64()
+		current = d.blockchain.CurrentSnapBlock().Number.Uint64()
 	case d.lightchain != nil:
 		current = d.lightchain.CurrentHeader().Number.Uint64()
 	default:
@@ -523,7 +523,7 @@ func (d *Downloader) syncWithPeer(p *peerConnection, hash common.Hash, td, ttd *
 	// anyway, but still need a valid pivot block to avoid some code hitting
 	// nil panics on access.
 	if mode == SnapSync && pivot == nil {
-		pivot = d.blockchain.CurrentBlock().Header()
+		pivot = d.blockchain.CurrentBlock()
 	}
 	height := latest.Number.Uint64()
 
@@ -834,9 +834,9 @@ func (d *Downloader) findAncestor(p *peerConnection, remoteHeader *types.Header)
 	mode := d.getMode()
 	switch mode {
 	case FullSync:
-		localHeight = d.blockchain.CurrentBlock().NumberU64()
+		localHeight = d.blockchain.CurrentBlock().Number.Uint64()
 	case SnapSync:
-		localHeight = d.blockchain.CurrentFastBlock().NumberU64()
+		localHeight = d.blockchain.CurrentSnapBlock().Number.Uint64()
 	default:
 		localHeight = d.lightchain.CurrentHeader().Number.Uint64()
 	}
@@ -1174,8 +1174,8 @@ func (d *Downloader) fetchHeaders(p *peerConnection, from uint64, head uint64) e
 				if mode == LightSync {
 					head = d.lightchain.CurrentHeader().Number.Uint64()
 				} else {
-					head = d.blockchain.CurrentFastBlock().NumberU64()
-					if full := d.blockchain.CurrentBlock().NumberU64(); head < full {
+					head = d.blockchain.CurrentSnapBlock().Number.Uint64()
+					if full := d.blockchain.CurrentBlock().Number.Uint64(); head < full {
 						head = full
 					}
 				}
@@ -1289,8 +1289,8 @@ func (d *Downloader) processHeaders(origin uint64, td, ttd *big.Int, beaconMode
 		if rollback > 0 {
 			lastHeader, lastFastBlock, lastBlock := d.lightchain.CurrentHeader().Number, common.Big0, common.Big0
 			if mode != LightSync {
-				lastFastBlock = d.blockchain.CurrentFastBlock().Number()
-				lastBlock = d.blockchain.CurrentBlock().Number()
+				lastFastBlock = d.blockchain.CurrentSnapBlock().Number
+				lastBlock = d.blockchain.CurrentBlock().Number
 			}
 			if err := d.lightchain.SetHead(rollback - 1); err != nil { // -1 to target the parent of the first uncertain block
 				// We're already unwinding the stack, only print the error to make it more visible
@@ -1298,8 +1298,8 @@ func (d *Downloader) processHeaders(origin uint64, td, ttd *big.Int, beaconMode
 			}
 			curFastBlock, curBlock := common.Big0, common.Big0
 			if mode != LightSync {
-				curFastBlock = d.blockchain.CurrentFastBlock().Number()
-				curBlock = d.blockchain.CurrentBlock().Number()
+				curFastBlock = d.blockchain.CurrentSnapBlock().Number
+				curBlock = d.blockchain.CurrentBlock().Number
 			}
 			log.Warn("Rolled back chain segment",
 				"header", fmt.Sprintf("%d->%d", lastHeader, d.lightchain.CurrentHeader().Number),
@@ -1344,7 +1344,7 @@ func (d *Downloader) processHeaders(origin uint64, td, ttd *big.Int, beaconMode
 					// R: Nothing to give
 					if mode != LightSync {
 						head := d.blockchain.CurrentBlock()
-						if !gotHeaders && td.Cmp(d.blockchain.GetTd(head.Hash(), head.NumberU64())) > 0 {
+						if !gotHeaders && td.Cmp(d.blockchain.GetTd(head.Hash(), head.Number.Uint64())) > 0 {
 							return errStallingPeer
 						}
 					}
@@ -1868,9 +1868,9 @@ func (d *Downloader) reportSnapSyncProgress(force bool) {
 	}
 	var (
 		header = d.blockchain.CurrentHeader()
-		block  = d.blockchain.CurrentFastBlock()
+		block  = d.blockchain.CurrentSnapBlock()
 	)
-	syncedBlocks := block.NumberU64() - d.syncStartBlock
+	syncedBlocks := block.Number.Uint64() - d.syncStartBlock
 	if syncedBlocks == 0 {
 		return
 	}
@@ -1887,13 +1887,13 @@ func (d *Downloader) reportSnapSyncProgress(force bool) {
 		return
 	}
 	var (
-		left = latest.Number.Uint64() - block.NumberU64()
+		left = latest.Number.Uint64() - block.Number.Uint64()
 		eta  = time.Since(d.syncStartTime) / time.Duration(syncedBlocks) * time.Duration(left)
 
-		progress = fmt.Sprintf("%.2f%%", float64(block.NumberU64())*100/float64(latest.Number.Uint64()))
+		progress = fmt.Sprintf("%.2f%%", float64(block.Number.Uint64())*100/float64(latest.Number.Uint64()))
 		headers  = fmt.Sprintf("%v@%v", log.FormatLogfmtUint64(header.Number.Uint64()), common.StorageSize(headerBytes).TerminalString())
-		bodies   = fmt.Sprintf("%v@%v", log.FormatLogfmtUint64(block.NumberU64()), common.StorageSize(bodyBytes).TerminalString())
-		receipts = fmt.Sprintf("%v@%v", log.FormatLogfmtUint64(block.NumberU64()), common.StorageSize(receiptBytes).TerminalString())
+		bodies   = fmt.Sprintf("%v@%v", log.FormatLogfmtUint64(block.Number.Uint64()), common.StorageSize(bodyBytes).TerminalString())
+		receipts = fmt.Sprintf("%v@%v", log.FormatLogfmtUint64(block.Number.Uint64()), common.StorageSize(receiptBytes).TerminalString())
 	)
 	log.Info("Syncing: chain download in progress", "synced", progress, "chain", syncedBytes, "headers", headers, "bodies", bodies, "receipts", receipts, "eta", common.PrettyDuration(eta))
 	d.syncLogTime = time.Now()
diff --git a/eth/downloader/downloader_test.go b/eth/downloader/downloader_test.go
index ababb9deb140..a884c1e950b0 100644
--- a/eth/downloader/downloader_test.go
+++ b/eth/downloader/downloader_test.go
@@ -100,7 +100,7 @@ func (dl *downloadTester) sync(id string, td *big.Int, mode SyncMode) error {
 	head := dl.peers[id].chain.CurrentBlock()
 	if td == nil {
 		// If no particular TD was requested, load from the peer's blockchain
-		td = dl.peers[id].chain.GetTd(head.Hash(), head.NumberU64())
+		td = dl.peers[id].chain.GetTd(head.Hash(), head.Number.Uint64())
 	}
 	// Synchronise with the chosen peer and ensure proper cleanup afterwards
 	err := dl.downloader.synchronise(id, head.Hash(), td, nil, mode, false, nil)
@@ -158,7 +158,7 @@ type downloadTesterPeer struct {
 // and total difficulty.
 func (dlp *downloadTesterPeer) Head() (common.Hash, *big.Int) {
 	head := dlp.chain.CurrentBlock()
-	return head.Hash(), dlp.chain.GetTd(head.Hash(), head.NumberU64())
+	return head.Hash(), dlp.chain.GetTd(head.Hash(), head.Number.Uint64())
 }
 
 func unmarshalRlpHeaders(rlpdata []rlp.RawValue) []*types.Header {
@@ -430,10 +430,10 @@ func assertOwnChain(t *testing.T, tester *downloadTester, length int) {
 	if hs := int(tester.chain.CurrentHeader().Number.Uint64()) + 1; hs != headers {
 		t.Fatalf("synchronised headers mismatch: have %v, want %v", hs, headers)
 	}
-	if bs := int(tester.chain.CurrentBlock().NumberU64()) + 1; bs != blocks {
+	if bs := int(tester.chain.CurrentBlock().Number.Uint64()) + 1; bs != blocks {
 		t.Fatalf("synchronised blocks mismatch: have %v, want %v", bs, blocks)
 	}
-	if rs := int(tester.chain.CurrentFastBlock().NumberU64()) + 1; rs != receipts {
+	if rs := int(tester.chain.CurrentSnapBlock().Number.Uint64()) + 1; rs != receipts {
 		t.Fatalf("synchronised receipts mismatch: have %v, want %v", rs, receipts)
 	}
 }
@@ -490,7 +490,7 @@ func testThrottling(t *testing.T, protocol uint, mode SyncMode) {
 	for {
 		// Check the retrieval count synchronously (! reason for this ugly block)
 		tester.lock.RLock()
-		retrieved := int(tester.chain.CurrentFastBlock().Number().Uint64()) + 1
+		retrieved := int(tester.chain.CurrentSnapBlock().Number.Uint64()) + 1
 		tester.lock.RUnlock()
 		if retrieved >= targetBlocks+1 {
 			break
@@ -506,7 +506,7 @@ func testThrottling(t *testing.T, protocol uint, mode SyncMode) {
 			{
 				cached = tester.downloader.queue.resultCache.countCompleted()
 				frozen = int(atomic.LoadUint32(&blocked))
-				retrieved = int(tester.chain.CurrentFastBlock().Number().Uint64()) + 1
+				retrieved = int(tester.chain.CurrentSnapBlock().Number.Uint64()) + 1
 			}
 			tester.downloader.queue.resultCache.lock.Unlock()
 			tester.downloader.queue.lock.Unlock()
@@ -522,7 +522,7 @@ func testThrottling(t *testing.T, protocol uint, mode SyncMode) {
 		// Make sure we filled up the cache, then exhaust it
 		time.Sleep(25 * time.Millisecond) // give it a chance to screw up
 		tester.lock.RLock()
-		retrieved = int(tester.chain.CurrentFastBlock().Number().Uint64()) + 1
+		retrieved = int(tester.chain.CurrentSnapBlock().Number.Uint64()) + 1
 		tester.lock.RUnlock()
 		if cached != blockCacheMaxItems && cached != blockCacheMaxItems-reorgProtHeaderDelay && retrieved+cached+frozen != targetBlocks+1 && retrieved+cached+frozen != targetBlocks+1-reorgProtHeaderDelay {
 			t.Fatalf("block count mismatch: have %v, want %v (owned %v, blocked %v, target %v)", cached, blockCacheMaxItems, retrieved, frozen, targetBlocks+1)
@@ -921,7 +921,7 @@ func testInvalidHeaderRollback(t *testing.T, protocol uint, mode SyncMode) {
 		t.Errorf("rollback head mismatch: have %v, want at most %v", head, 2*fsHeaderSafetyNet+MaxHeaderFetch)
 	}
 	if mode == SnapSync {
-		if head := tester.chain.CurrentBlock().NumberU64(); head != 0 {
+		if head := tester.chain.CurrentBlock().Number.Uint64(); head != 0 {
 			t.Errorf("fast sync pivot block #%d not rolled back", head)
 		}
 	}
@@ -943,7 +943,7 @@ func testInvalidHeaderRollback(t *testing.T, protocol uint, mode SyncMode) {
 		t.Errorf("rollback head mismatch: have %v, want at most %v", head, 2*fsHeaderSafetyNet+MaxHeaderFetch)
 	}
 	if mode == SnapSync {
-		if head := tester.chain.CurrentBlock().NumberU64(); head != 0 {
+		if head := tester.chain.CurrentBlock().Number.Uint64(); head != 0 {
 			t.Errorf("fast sync pivot block #%d not rolled back", head)
 		}
 	}
@@ -1484,7 +1484,7 @@ func testBeaconSync(t *testing.T, protocol uint, mode SyncMode) {
 			select {
 			case <-success:
 				// Ok, downloader fully cancelled after sync cycle
-				if bs := int(tester.chain.CurrentBlock().NumberU64()) + 1; bs != len(chain.blocks) {
+				if bs := int(tester.chain.CurrentBlock().Number.Uint64()) + 1; bs != len(chain.blocks) {
 					t.Fatalf("synchronised blocks mismatch: have %v, want %v", bs, len(chain.blocks))
 				}
 			case <-time.NewTimer(time.Second * 3).C:
diff --git a/eth/gasprice/gasprice_test.go b/eth/gasprice/gasprice_test.go
index a987d46458e4..4ee5a0d1b287 100644
--- a/eth/gasprice/gasprice_test.go
+++ b/eth/gasprice/gasprice_test.go
@@ -49,10 +49,10 @@ func (b *testBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber
 		number = 0
 	}
 	if number == rpc.FinalizedBlockNumber {
-		return b.chain.CurrentFinalizedBlock().Header(), nil
+		return b.chain.CurrentFinalBlock(), nil
 	}
 	if number == rpc.SafeBlockNumber {
-		return b.chain.CurrentSafeBlock().Header(), nil
+		return b.chain.CurrentSafeBlock(), nil
 	}
 	if number == rpc.LatestBlockNumber {
 		number = testHead
@@ -75,10 +75,10 @@ func (b *testBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber)
 		number = 0
 	}
 	if number == rpc.FinalizedBlockNumber {
-		return b.chain.CurrentFinalizedBlock(), nil
+		number = rpc.BlockNumber(b.chain.CurrentFinalBlock().Number.Uint64())
 	}
 	if number == rpc.SafeBlockNumber {
-		return b.chain.CurrentSafeBlock(), nil
+		number = rpc.BlockNumber(b.chain.CurrentSafeBlock().Number.Uint64())
 	}
 	if number == rpc.LatestBlockNumber {
 		number = testHead
@@ -169,8 +169,8 @@ func newTestBackend(t *testing.T, londonBlock *big.Int, pending bool) *testBacke
 		t.Fatalf("Failed to create local chain, %v", err)
 	}
 	chain.InsertChain(blocks)
-	chain.SetFinalized(chain.GetBlockByNumber(25))
-	chain.SetSafe(chain.GetBlockByNumber(25))
+	chain.SetFinalized(chain.GetBlockByNumber(25).Header())
+	chain.SetSafe(chain.GetBlockByNumber(25).Header())
 	return &testBackend{chain: chain, pending: pending}
 }
 
diff --git a/eth/handler.go b/eth/handler.go
index 078133f059f2..83df6ff2eb60 100644
--- a/eth/handler.go
+++ b/eth/handler.go
@@ -152,13 +152,13 @@ func newHandler(config *handlerConfig) (*handler, error) {
 		// * the last snap sync is not finished while user specifies a full sync this
 		//   time. But we don't have any recent state for full sync.
 		// In these cases however it's safe to reenable snap sync.
-		fullBlock, fastBlock := h.chain.CurrentBlock(), h.chain.CurrentFastBlock()
-		if fullBlock.NumberU64() == 0 && fastBlock.NumberU64() > 0 {
+		fullBlock, snapBlock := h.chain.CurrentBlock(), h.chain.CurrentSnapBlock()
+		if fullBlock.Number.Uint64() == 0 && snapBlock.Number.Uint64() > 0 {
 			h.snapSync = uint32(1)
 			log.Warn("Switch sync mode from full sync to snap sync")
 		}
 	} else {
-		if h.chain.CurrentBlock().NumberU64() > 0 {
+		if h.chain.CurrentBlock().Number.Uint64() > 0 {
 			// Print warning log if database is not empty to run snap sync.
 			log.Warn("Switch sync mode from snap sync to full sync")
 		} else {
@@ -183,10 +183,10 @@ func newHandler(config *handlerConfig) (*handler, error) {
 		// If we've successfully finished a sync cycle and passed any required
 		// checkpoint, enable accepting transactions from the network
 		head := h.chain.CurrentBlock()
-		if head.NumberU64() >= h.checkpointNumber {
+		if head.Number.Uint64() >= h.checkpointNumber {
 			// Checkpoint passed, sanity check the timestamp to have a fallback mechanism
 			// for non-checkpointed (number = 0) private networks.
-			if head.Time() >= uint64(time.Now().AddDate(0, -1, 0).Unix()) {
+			if head.Time >= uint64(time.Now().AddDate(0, -1, 0).Unix()) {
 				atomic.StoreUint32(&h.acceptTxs, 1)
 			}
 		}
@@ -198,7 +198,7 @@ func newHandler(config *handlerConfig) (*handler, error) {
 			log.Info("Chain post-merge, sync via beacon client")
 		} else {
 			head := h.chain.CurrentBlock()
-			if td := h.chain.GetTd(head.Hash(), head.NumberU64()); td.Cmp(ttd) >= 0 {
+			if td := h.chain.GetTd(head.Hash(), head.Number.Uint64()); td.Cmp(ttd) >= 0 {
 				log.Info("Chain post-TTD, sync via beacon client")
 			} else {
 				log.Warn("Chain pre-merge, sync via PoW (ensure beacon client is ready)")
@@ -227,7 +227,7 @@ func newHandler(config *handlerConfig) (*handler, error) {
 		return h.chain.Engine().VerifyHeader(h.chain, header, true)
 	}
 	heighter := func() uint64 {
-		return h.chain.CurrentBlock().NumberU64()
+		return h.chain.CurrentBlock().Number.Uint64()
 	}
 	inserter := func(blocks types.Blocks) (int, error) {
 		// All the block fetcher activities should be disabled
@@ -250,7 +250,7 @@ func newHandler(config *handlerConfig) (*handler, error) {
 		// the propagated block if the head is too old. Unfortunately there is a corner
 		// case when starting new networks, where the genesis might be ancient (0 unix)
 		// which would prevent full nodes from accepting it.
-		if h.chain.CurrentBlock().NumberU64() < h.checkpointNumber {
+		if h.chain.CurrentBlock().Number.Uint64() < h.checkpointNumber {
 			log.Warn("Unsynced yet, discarded propagated block", "number", blocks[0].Number(), "hash", blocks[0].Hash())
 			return 0, nil
 		}
diff --git a/eth/handler_eth_test.go b/eth/handler_eth_test.go
index 502cc8e6a9f6..9f0dd8ec5de4 100644
--- a/eth/handler_eth_test.go
+++ b/eth/handler_eth_test.go
@@ -274,7 +274,7 @@ func testRecvTransactions(t *testing.T, protocol uint) {
 	var (
 		genesis = handler.chain.Genesis()
 		head    = handler.chain.CurrentBlock()
-		td      = handler.chain.GetTd(head.Hash(), head.NumberU64())
+		td      = handler.chain.GetTd(head.Hash(), head.Number.Uint64())
 	)
 	if err := src.Handshake(1, td, head.Hash(), genesis.Hash(), forkid.NewIDWithChain(handler.chain), forkid.NewFilter(handler.chain)); err != nil {
 		t.Fatalf("failed to run protocol handshake")
@@ -337,7 +337,7 @@ func testSendTransactions(t *testing.T, protocol uint) {
 	var (
 		genesis = handler.chain.Genesis()
 		head    = handler.chain.CurrentBlock()
-		td      = handler.chain.GetTd(head.Hash(), head.NumberU64())
+		td      = handler.chain.GetTd(head.Hash(), head.Number.Uint64())
 	)
 	if err := sink.Handshake(1, td, head.Hash(), genesis.Hash(), forkid.NewIDWithChain(handler.chain), forkid.NewFilter(handler.chain)); err != nil {
 		t.Fatalf("failed to run protocol handshake")
@@ -545,7 +545,7 @@ func testCheckpointChallenge(t *testing.T, syncmode downloader.SyncMode, checkpo
 	var (
 		genesis = handler.chain.Genesis()
 		head    = handler.chain.CurrentBlock()
-		td      = handler.chain.GetTd(head.Hash(), head.NumberU64())
+		td      = handler.chain.GetTd(head.Hash(), head.Number.Uint64())
 	)
 	if err := remote.Handshake(1, td, head.Hash(), genesis.Hash(), forkid.NewIDWithChain(handler.chain), forkid.NewFilter(handler.chain)); err != nil {
 		t.Fatalf("failed to run protocol handshake")
@@ -661,7 +661,8 @@ func testBroadcastBlock(t *testing.T, peers, bcasts int) {
 	}
 	// Initiate a block propagation across the peers
 	time.Sleep(100 * time.Millisecond)
-	source.handler.BroadcastBlock(source.chain.CurrentBlock(), true)
+	header := source.chain.CurrentBlock()
+	source.handler.BroadcastBlock(source.chain.GetBlock(header.Hash(), header.Number.Uint64()), true)
 
 	// Iterate through all the sinks and ensure the correct number got the block
 	done := make(chan struct{}, peers)
@@ -734,18 +735,19 @@ func testBroadcastMalformedBlock(t *testing.T, protocol uint) {
 
 	// Create various combinations of malformed blocks
 	head := source.chain.CurrentBlock()
+	block := source.chain.GetBlock(head.Hash(), head.Number.Uint64())
 
-	malformedUncles := head.Header()
+	malformedUncles := head
 	malformedUncles.UncleHash[0]++
-	malformedTransactions := head.Header()
+	malformedTransactions := head
 	malformedTransactions.TxHash[0]++
-	malformedEverything := head.Header()
+	malformedEverything := head
 	malformedEverything.UncleHash[0]++
 	malformedEverything.TxHash[0]++
 
 	// Try to broadcast all malformations and ensure they all get discarded
 	for _, header := range []*types.Header{malformedUncles, malformedTransactions, malformedEverything} {
-		block := types.NewBlockWithHeader(header).WithBody(head.Transactions(), head.Uncles())
+		block := types.NewBlockWithHeader(header).WithBody(block.Transactions(), block.Uncles())
 		if err := src.SendNewBlock(block, big.NewInt(131136)); err != nil {
 			t.Fatalf("failed to broadcast block: %v", err)
 		}
diff --git a/eth/protocols/eth/handler.go b/eth/protocols/eth/handler.go
index ae4ec9142e8b..2f2dd1cf6ae3 100644
--- a/eth/protocols/eth/handler.go
+++ b/eth/protocols/eth/handler.go
@@ -137,12 +137,14 @@ type NodeInfo struct {
 // nodeInfo retrieves some `eth` protocol metadata about the running host node.
 func nodeInfo(chain *core.BlockChain, network uint64) *NodeInfo {
 	head := chain.CurrentBlock()
+	hash := head.Hash()
+
 	return &NodeInfo{
 		Network:    network,
-		Difficulty: chain.GetTd(head.Hash(), head.NumberU64()),
+		Difficulty: chain.GetTd(hash, head.Number.Uint64()),
 		Genesis:    chain.Genesis().Hash(),
 		Config:     chain.Config(),
-		Head:       head.Hash(),
+		Head:       hash,
 	}
 }
 
diff --git a/eth/protocols/eth/handler_test.go b/eth/protocols/eth/handler_test.go
index 76505ab8d32b..bbb9866bd3df 100644
--- a/eth/protocols/eth/handler_test.go
+++ b/eth/protocols/eth/handler_test.go
@@ -225,24 +225,24 @@ func testGetBlockHeaders(t *testing.T, protocol uint) {
 			[]common.Hash{backend.chain.GetBlockByNumber(0).Hash()},
 		},
 		{
-			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().NumberU64()}, Amount: 1},
+			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().Number.Uint64()}, Amount: 1},
 			[]common.Hash{backend.chain.CurrentBlock().Hash()},
 		},
 		{ // If the peer requests a bit into the future, we deliver what we have
-			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().NumberU64()}, Amount: 10},
+			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().Number.Uint64()}, Amount: 10},
 			[]common.Hash{backend.chain.CurrentBlock().Hash()},
 		},
 		// Ensure protocol limits are honored
 		{
-			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().NumberU64() - 1}, Amount: limit + 10, Reverse: true},
-			getHashes(backend.chain.CurrentBlock().NumberU64(), limit),
+			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().Number.Uint64() - 1}, Amount: limit + 10, Reverse: true},
+			getHashes(backend.chain.CurrentBlock().Number.Uint64(), limit),
 		},
 		// Check that requesting more than available is handled gracefully
 		{
-			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().NumberU64() - 4}, Skip: 3, Amount: 3},
+			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().Number.Uint64() - 4}, Skip: 3, Amount: 3},
 			[]common.Hash{
-				backend.chain.GetBlockByNumber(backend.chain.CurrentBlock().NumberU64() - 4).Hash(),
-				backend.chain.GetBlockByNumber(backend.chain.CurrentBlock().NumberU64()).Hash(),
+				backend.chain.GetBlockByNumber(backend.chain.CurrentBlock().Number.Uint64() - 4).Hash(),
+				backend.chain.GetBlockByNumber(backend.chain.CurrentBlock().Number.Uint64()).Hash(),
 			},
 		}, {
 			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: 4}, Skip: 3, Amount: 3, Reverse: true},
@@ -253,10 +253,10 @@ func testGetBlockHeaders(t *testing.T, protocol uint) {
 		},
 		// Check that requesting more than available is handled gracefully, even if mid skip
 		{
-			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().NumberU64() - 4}, Skip: 2, Amount: 3},
+			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().Number.Uint64() - 4}, Skip: 2, Amount: 3},
 			[]common.Hash{
-				backend.chain.GetBlockByNumber(backend.chain.CurrentBlock().NumberU64() - 4).Hash(),
-				backend.chain.GetBlockByNumber(backend.chain.CurrentBlock().NumberU64() - 1).Hash(),
+				backend.chain.GetBlockByNumber(backend.chain.CurrentBlock().Number.Uint64() - 4).Hash(),
+				backend.chain.GetBlockByNumber(backend.chain.CurrentBlock().Number.Uint64() - 1).Hash(),
 			},
 		}, {
 			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: 4}, Skip: 2, Amount: 3, Reverse: true},
@@ -293,7 +293,7 @@ func testGetBlockHeaders(t *testing.T, protocol uint) {
 			&GetBlockHeadersPacket{Origin: HashOrNumber{Hash: unknown}, Amount: 1},
 			[]common.Hash{},
 		}, {
-			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().NumberU64() + 1}, Amount: 1},
+			&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().Number.Uint64() + 1}, Amount: 1},
 			[]common.Hash{},
 		},
 	}
@@ -394,7 +394,7 @@ func testGetBlockBodies(t *testing.T, protocol uint) {
 		)
 		for j := 0; j < tt.random; j++ {
 			for {
-				num := rand.Int63n(int64(backend.chain.CurrentBlock().NumberU64()))
+				num := rand.Int63n(int64(backend.chain.CurrentBlock().Number.Uint64()))
 				if !seen[num] {
 					seen[num] = true
 
@@ -529,7 +529,7 @@ func testGetNodeData(t *testing.T, protocol uint, drop bool) {
 
 	// Sanity check whether all state matches.
 	accounts := []common.Address{testAddr, acc1Addr, acc2Addr}
-	for i := uint64(0); i <= backend.chain.CurrentBlock().NumberU64(); i++ {
+	for i := uint64(0); i <= backend.chain.CurrentBlock().Number.Uint64(); i++ {
 		root := backend.chain.GetBlockByNumber(i).Root()
 		reconstructed, _ := state.New(root, state.NewDatabase(reconstructDB), nil)
 		for j, acc := range accounts {
@@ -602,7 +602,7 @@ func testGetBlockReceipts(t *testing.T, protocol uint) {
 		hashes   []common.Hash
 		receipts [][]*types.Receipt
 	)
-	for i := uint64(0); i <= backend.chain.CurrentBlock().NumberU64(); i++ {
+	for i := uint64(0); i <= backend.chain.CurrentBlock().Number.Uint64(); i++ {
 		block := backend.chain.GetBlockByNumber(i)
 
 		hashes = append(hashes, block.Hash())
diff --git a/eth/protocols/eth/handshake_test.go b/eth/protocols/eth/handshake_test.go
index c768edaeac01..5c6727d91cc7 100644
--- a/eth/protocols/eth/handshake_test.go
+++ b/eth/protocols/eth/handshake_test.go
@@ -39,7 +39,7 @@ func testHandshake(t *testing.T, protocol uint) {
 	var (
 		genesis = backend.chain.Genesis()
 		head    = backend.chain.CurrentBlock()
-		td      = backend.chain.GetTd(head.Hash(), head.NumberU64())
+		td      = backend.chain.GetTd(head.Hash(), head.Number.Uint64())
 		forkID  = forkid.NewID(backend.chain.Config(), backend.chain.Genesis().Hash(), backend.chain.CurrentHeader().Number.Uint64(), backend.chain.CurrentHeader().Time)
 	)
 	tests := []struct {
diff --git a/eth/sync.go b/eth/sync.go
index 8fd86b578cf6..6d764ef4822b 100644
--- a/eth/sync.go
+++ b/eth/sync.go
@@ -206,22 +206,22 @@ func peerToSyncOp(mode downloader.SyncMode, p *eth.Peer) *chainSyncOp {
 func (cs *chainSyncer) modeAndLocalHead() (downloader.SyncMode, *big.Int) {
 	// If we're in snap sync mode, return that directly
 	if atomic.LoadUint32(&cs.handler.snapSync) == 1 {
-		block := cs.handler.chain.CurrentFastBlock()
-		td := cs.handler.chain.GetTd(block.Hash(), block.NumberU64())
+		block := cs.handler.chain.CurrentSnapBlock()
+		td := cs.handler.chain.GetTd(block.Hash(), block.Number.Uint64())
 		return downloader.SnapSync, td
 	}
 	// We are probably in full sync, but we might have rewound to before the
 	// snap sync pivot, check if we should reenable
 	if pivot := rawdb.ReadLastPivotNumber(cs.handler.database); pivot != nil {
-		if head := cs.handler.chain.CurrentBlock(); head.NumberU64() < *pivot {
-			block := cs.handler.chain.CurrentFastBlock()
-			td := cs.handler.chain.GetTd(block.Hash(), block.NumberU64())
+		if head := cs.handler.chain.CurrentBlock(); head.Number.Uint64() < *pivot {
+			block := cs.handler.chain.CurrentSnapBlock()
+			td := cs.handler.chain.GetTd(block.Hash(), block.Number.Uint64())
 			return downloader.SnapSync, td
 		}
 	}
 	// Nope, we're really full syncing
 	head := cs.handler.chain.CurrentBlock()
-	td := cs.handler.chain.GetTd(head.Hash(), head.NumberU64())
+	td := cs.handler.chain.GetTd(head.Hash(), head.Number.Uint64())
 	return downloader.FullSync, td
 }
 
@@ -263,21 +263,23 @@ func (h *handler) doSync(op *chainSyncOp) error {
 	// If we've successfully finished a sync cycle and passed any required checkpoint,
 	// enable accepting transactions from the network.
 	head := h.chain.CurrentBlock()
-	if head.NumberU64() >= h.checkpointNumber {
+	if head.Number.Uint64() >= h.checkpointNumber {
 		// Checkpoint passed, sanity check the timestamp to have a fallback mechanism
 		// for non-checkpointed (number = 0) private networks.
-		if head.Time() >= uint64(time.Now().AddDate(0, -1, 0).Unix()) {
+		if head.Time >= uint64(time.Now().AddDate(0, -1, 0).Unix()) {
 			atomic.StoreUint32(&h.acceptTxs, 1)
 		}
 	}
-	if head.NumberU64() > 0 {
+	if head.Number.Uint64() > 0 {
 		// We've completed a sync cycle, notify all peers of new state. This path is
 		// essential in star-topology networks where a gateway node needs to notify
 		// all its out-of-date peers of the availability of a new block. This failure
 		// scenario will most often crop up in private and hackathon networks with
 		// degenerate connectivity, but it should be healthy for the mainnet too to
 		// more reliably update peers or the local TD state.
-		h.BroadcastBlock(head, false)
+		if block := h.chain.GetBlock(head.Hash(), head.Number.Uint64()); block != nil {
+			h.BroadcastBlock(block, false)
+		}
 	}
 	return nil
 }
diff --git a/eth/tracers/api_test.go b/eth/tracers/api_test.go
index 29ec80868579..b0dae4ca3e0d 100644
--- a/eth/tracers/api_test.go
+++ b/eth/tracers/api_test.go
@@ -109,7 +109,7 @@ func (b *testBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types
 
 func (b *testBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
 	if number == rpc.PendingBlockNumber || number == rpc.LatestBlockNumber {
-		return b.chain.CurrentBlock(), nil
+		return b.chain.GetBlockByNumber(b.chain.CurrentBlock().Number.Uint64()), nil
 	}
 	return b.chain.GetBlockByNumber(uint64(number)), nil
 }
diff --git a/graphql/graphql.go b/graphql/graphql.go
index 356ff669fb16..0c13cc80f555 100644
--- a/graphql/graphql.go
+++ b/graphql/graphql.go
@@ -1219,7 +1219,7 @@ func (r *Resolver) Blocks(ctx context.Context, args struct {
 	if args.To != nil {
 		to = rpc.BlockNumber(*args.To)
 	} else {
-		to = rpc.BlockNumber(r.backend.CurrentBlock().Number().Int64())
+		to = rpc.BlockNumber(r.backend.CurrentBlock().Number.Int64())
 	}
 	if to < from {
 		return []*Block{}, nil
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 12a4ba1b37b8..55702d7cbc8a 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1704,7 +1704,7 @@ func SubmitTransaction(ctx context.Context, b Backend, tx *types.Transaction) (c
 		return common.Hash{}, err
 	}
 	// Print a log with full tx details for manual investigations and interventions
-	signer := types.MakeSigner(b.ChainConfig(), b.CurrentBlock().Number())
+	signer := types.MakeSigner(b.ChainConfig(), b.CurrentBlock().Number)
 	from, err := types.Sender(signer, tx)
 	if err != nil {
 		return common.Hash{}, err
diff --git a/internal/ethapi/backend.go b/internal/ethapi/backend.go
index 0c1763472f2d..2405efa234e3 100644
--- a/internal/ethapi/backend.go
+++ b/internal/ethapi/backend.go
@@ -59,7 +59,7 @@ type Backend interface {
 	HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error)
 	HeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Header, error)
 	CurrentHeader() *types.Header
-	CurrentBlock() *types.Block
+	CurrentBlock() *types.Header
 	BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error)
 	BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error)
 	BlockByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Block, error)
diff --git a/internal/ethapi/transaction_args_test.go b/internal/ethapi/transaction_args_test.go
index a8f2d5214889..3279b6a8e533 100644
--- a/internal/ethapi/transaction_args_test.go
+++ b/internal/ethapi/transaction_args_test.go
@@ -278,7 +278,7 @@ func (b *backendMock) HeaderByHash(ctx context.Context, hash common.Hash) (*type
 func (b *backendMock) HeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Header, error) {
 	return nil, nil
 }
-func (b *backendMock) CurrentBlock() *types.Block { return nil }
+func (b *backendMock) CurrentBlock() *types.Header { return nil }
 func (b *backendMock) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
 	return nil, nil
 }
diff --git a/les/api_backend.go b/les/api_backend.go
index 422ac74b8668..a724af04c5d3 100644
--- a/les/api_backend.go
+++ b/les/api_backend.go
@@ -52,8 +52,8 @@ func (b *LesApiBackend) ChainConfig() *params.ChainConfig {
 	return b.eth.chainConfig
 }
 
-func (b *LesApiBackend) CurrentBlock() *types.Block {
-	return types.NewBlockWithHeader(b.eth.BlockChain().CurrentHeader())
+func (b *LesApiBackend) CurrentBlock() *types.Header {
+	return b.eth.BlockChain().CurrentHeader()
 }
 
 func (b *LesApiBackend) SetHead(number uint64) {
diff --git a/les/handler_test.go b/les/handler_test.go
index b7be29b862ab..c39709259619 100644
--- a/les/handler_test.go
+++ b/les/handler_test.go
@@ -121,20 +121,20 @@ func testGetBlockHeaders(t *testing.T, protocol int) {
 			&GetBlockHeadersData{Origin: hashOrNumber{Number: 0}, Amount: 1},
 			[]common.Hash{bc.GetBlockByNumber(0).Hash()},
 		}, {
-			&GetBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().NumberU64()}, Amount: 1},
+			&GetBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().Number.Uint64()}, Amount: 1},
 			[]common.Hash{bc.CurrentBlock().Hash()},
 		},
 		// Ensure protocol limits are honored
 		//{
-		//	&GetBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().NumberU64() - 1}, Amount: limit + 10, Reverse: true},
+		//	&GetBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().Number.Uint64()() - 1}, Amount: limit + 10, Reverse: true},
 		//	[]common.Hash{},
 		//},
 		// Check that requesting more than available is handled gracefully
 		{
-			&GetBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().NumberU64() - 4}, Skip: 3, Amount: 3},
+			&GetBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().Number.Uint64() - 4}, Skip: 3, Amount: 3},
 			[]common.Hash{
-				bc.GetBlockByNumber(bc.CurrentBlock().NumberU64() - 4).Hash(),
-				bc.GetBlockByNumber(bc.CurrentBlock().NumberU64()).Hash(),
+				bc.GetBlockByNumber(bc.CurrentBlock().Number.Uint64() - 4).Hash(),
+				bc.GetBlockByNumber(bc.CurrentBlock().Number.Uint64()).Hash(),
 			},
 		}, {
 			&GetBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 3, Amount: 3, Reverse: true},
@@ -145,10 +145,10 @@ func testGetBlockHeaders(t *testing.T, protocol int) {
 		},
 		// Check that requesting more than available is handled gracefully, even if mid skip
 		{
-			&GetBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().NumberU64() - 4}, Skip: 2, Amount: 3},
+			&GetBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().Number.Uint64() - 4}, Skip: 2, Amount: 3},
 			[]common.Hash{
-				bc.GetBlockByNumber(bc.CurrentBlock().NumberU64() - 4).Hash(),
-				bc.GetBlockByNumber(bc.CurrentBlock().NumberU64() - 1).Hash(),
+				bc.GetBlockByNumber(bc.CurrentBlock().Number.Uint64() - 4).Hash(),
+				bc.GetBlockByNumber(bc.CurrentBlock().Number.Uint64() - 1).Hash(),
 			},
 		}, {
 			&GetBlockHeadersData{Origin: hashOrNumber{Number: 4}, Skip: 2, Amount: 3, Reverse: true},
@@ -162,7 +162,7 @@ func testGetBlockHeaders(t *testing.T, protocol int) {
 			&GetBlockHeadersData{Origin: hashOrNumber{Hash: unknown}, Amount: 1},
 			[]common.Hash{},
 		}, {
-			&GetBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().NumberU64() + 1}, Amount: 1},
+			&GetBlockHeadersData{Origin: hashOrNumber{Number: bc.CurrentBlock().Number.Uint64() + 1}, Amount: 1},
 			[]common.Hash{},
 		},
 	}
@@ -240,7 +240,7 @@ func testGetBlockBodies(t *testing.T, protocol int) {
 
 		for j := 0; j < tt.random; j++ {
 			for {
-				num := rand.Int63n(int64(bc.CurrentBlock().NumberU64()))
+				num := rand.Int63n(int64(bc.CurrentBlock().Number.Uint64()))
 				if !seen[num] {
 					seen[num] = true
 
@@ -292,7 +292,7 @@ func testGetCode(t *testing.T, protocol int) {
 
 	var codereqs []*CodeReq
 	var codes [][]byte
-	for i := uint64(0); i <= bc.CurrentBlock().NumberU64(); i++ {
+	for i := uint64(0); i <= bc.CurrentBlock().Number.Uint64(); i++ {
 		header := bc.GetHeaderByNumber(i)
 		req := &CodeReq{
 			BHash:  header.Hash(),
@@ -367,7 +367,7 @@ func testGetReceipt(t *testing.T, protocol int) {
 	// Collect the hashes to request, and the response to expect
 	var receipts []types.Receipts
 	var hashes []common.Hash
-	for i := uint64(0); i <= bc.CurrentBlock().NumberU64(); i++ {
+	for i := uint64(0); i <= bc.CurrentBlock().Number.Uint64(); i++ {
 		block := bc.GetBlockByNumber(i)
 
 		hashes = append(hashes, block.Hash())
@@ -404,7 +404,7 @@ func testGetProofs(t *testing.T, protocol int) {
 	proofsV2 := light.NewNodeSet()
 
 	accounts := []common.Address{bankAddr, userAddr1, userAddr2, signerAddr, {}}
-	for i := uint64(0); i <= bc.CurrentBlock().NumberU64(); i++ {
+	for i := uint64(0); i <= bc.CurrentBlock().Number.Uint64(); i++ {
 		header := bc.GetHeaderByNumber(i)
 		trie, _ := trie.New(trie.StateTrieID(header.Root), trie.NewDatabase(server.db))
 
diff --git a/les/odr_test.go b/les/odr_test.go
index e028d35e639c..bd0574768c27 100644
--- a/les/odr_test.go
+++ b/les/odr_test.go
@@ -281,7 +281,7 @@ func testGetTxStatusFromUnindexedPeers(t *testing.T, protocol int) {
 		blockHashes  = make(map[common.Hash]common.Hash)        // Transaction hash to block hash mappings
 		intraIndex   = make(map[common.Hash]uint64)             // Transaction intra-index in block
 	)
-	for number := uint64(1); number < server.backend.Blockchain().CurrentBlock().NumberU64(); number++ {
+	for number := uint64(1); number < server.backend.Blockchain().CurrentBlock().Number.Uint64(); number++ {
 		block := server.backend.Blockchain().GetBlockByNumber(number)
 		if block == nil {
 			t.Fatalf("Failed to retrieve block %d", number)
diff --git a/miner/miner_test.go b/miner/miner_test.go
index 2e7682acd331..6bf3edae5dbb 100644
--- a/miner/miner_test.go
+++ b/miner/miner_test.go
@@ -19,6 +19,7 @@ package miner
 
 import (
 	"errors"
+	"math/big"
 	"testing"
 	"time"
 
@@ -65,14 +66,15 @@ type testBlockChain struct {
 	chainHeadFeed *event.Feed
 }
 
-func (bc *testBlockChain) CurrentBlock() *types.Block {
-	return types.NewBlock(&types.Header{
+func (bc *testBlockChain) CurrentBlock() *types.Header {
+	return &types.Header{
+		Number:   new(big.Int),
 		GasLimit: bc.gasLimit,
-	}, nil, nil, nil, trie.NewStackTrie(nil))
+	}
 }
 
 func (bc *testBlockChain) GetBlock(hash common.Hash, number uint64) *types.Block {
-	return bc.CurrentBlock()
+	return types.NewBlock(bc.CurrentBlock(), nil, nil, nil, trie.NewStackTrie(nil))
 }
 
 func (bc *testBlockChain) StateAt(common.Hash) (*state.StateDB, error) {
diff --git a/miner/worker.go b/miner/worker.go
index 49204f71a076..8940c5037b41 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -494,7 +494,7 @@ func (w *worker) newWorkLoop(recommit time.Duration) {
 	for {
 		select {
 		case <-w.startCh:
-			clearPending(w.chain.CurrentBlock().NumberU64())
+			clearPending(w.chain.CurrentBlock().Number.Uint64())
 			timestamp = time.Now().Unix()
 			commit(false, commitInterruptNewHead)
 
@@ -607,12 +607,12 @@ func (w *worker) mainLoop() {
 		case <-cleanTicker.C:
 			chainHead := w.chain.CurrentBlock()
 			for hash, uncle := range w.localUncles {
-				if uncle.NumberU64()+staleThreshold <= chainHead.NumberU64() {
+				if uncle.NumberU64()+staleThreshold <= chainHead.Number.Uint64() {
 					delete(w.localUncles, hash)
 				}
 			}
 			for hash, uncle := range w.remoteUncles {
-				if uncle.NumberU64()+staleThreshold <= chainHead.NumberU64() {
+				if uncle.NumberU64()+staleThreshold <= chainHead.Number.Uint64() {
 					delete(w.remoteUncles, hash)
 				}
 			}
@@ -790,10 +790,10 @@ func (w *worker) resultLoop() {
 }
 
 // makeEnv creates a new environment for the sealing block.
-func (w *worker) makeEnv(parent *types.Block, header *types.Header, coinbase common.Address) (*environment, error) {
+func (w *worker) makeEnv(parent *types.Header, header *types.Header, coinbase common.Address) (*environment, error) {
 	// Retrieve the parent state to execute on top and start a prefetcher for
 	// the miner to speed block sealing up a bit.
-	state, err := w.chain.StateAt(parent.Root())
+	state, err := w.chain.StateAt(parent.Root)
 	if err != nil {
 		return nil, err
 	}
@@ -988,25 +988,26 @@ func (w *worker) prepareWork(genParams *generateParams) (*environment, error) {
 	// Find the parent block for sealing task
 	parent := w.chain.CurrentBlock()
 	if genParams.parentHash != (common.Hash{}) {
-		parent = w.chain.GetBlockByHash(genParams.parentHash)
-	}
-	if parent == nil {
-		return nil, fmt.Errorf("missing parent")
+		block := w.chain.GetBlockByHash(genParams.parentHash)
+		if block == nil {
+			return nil, fmt.Errorf("missing parent")
+		}
+		parent = block.Header()
 	}
 	// Sanity check the timestamp correctness, recap the timestamp
 	// to parent+1 if the mutation is allowed.
 	timestamp := genParams.timestamp
-	if parent.Time() >= timestamp {
+	if parent.Time >= timestamp {
 		if genParams.forceTime {
-			return nil, fmt.Errorf("invalid timestamp, parent %d given %d", parent.Time(), timestamp)
+			return nil, fmt.Errorf("invalid timestamp, parent %d given %d", parent.Time, timestamp)
 		}
-		timestamp = parent.Time() + 1
+		timestamp = parent.Time + 1
 	}
 	// Construct the sealing block header.
 	header := &types.Header{
 		ParentHash: parent.Hash(),
-		Number:     new(big.Int).Add(parent.Number(), common.Big1),
-		GasLimit:   core.CalcGasLimit(parent.GasLimit(), w.config.GasCeil),
+		Number:     new(big.Int).Add(parent.Number, common.Big1),
+		GasLimit:   core.CalcGasLimit(parent.GasLimit, w.config.GasCeil),
 		Time:       timestamp,
 		Coinbase:   genParams.coinbase,
 	}
@@ -1020,9 +1021,9 @@ func (w *worker) prepareWork(genParams *generateParams) (*environment, error) {
 	}
 	// Set baseFee and GasLimit if we are on an EIP-1559 chain
 	if w.chainConfig.IsLondon(header.Number) {
-		header.BaseFee = misc.CalcBaseFee(w.chainConfig, parent.Header())
-		if !w.chainConfig.IsLondon(parent.Number()) {
-			parentGasLimit := parent.GasLimit() * w.chainConfig.ElasticityMultiplier()
+		header.BaseFee = misc.CalcBaseFee(w.chainConfig, parent)
+		if !w.chainConfig.IsLondon(parent.Number) {
+			parentGasLimit := parent.GasLimit * w.chainConfig.ElasticityMultiplier()
 			header.GasLimit = core.CalcGasLimit(parentGasLimit, w.config.GasCeil)
 		}
 	}
diff --git a/miner/worker_test.go b/miner/worker_test.go
index ba929d293d8a..e60de679326c 100644
--- a/miner/worker_test.go
+++ b/miner/worker_test.go
@@ -147,7 +147,7 @@ func newTestWorkerBackend(t *testing.T, chainConfig *params.ChainConfig, engine
 		if _, err := chain.InsertChain(blocks); err != nil {
 			t.Fatalf("failed to insert origin chain: %v", err)
 		}
-		parent := chain.GetBlockByHash(chain.CurrentBlock().ParentHash())
+		parent := chain.GetBlockByHash(chain.CurrentBlock().ParentHash)
 		blocks, _ = core.GenerateChain(chainConfig, parent, engine, genDb, 1, func(i int, gen *core.BlockGen) {
 			gen.SetCoinbase(testUserAddress)
 		})
@@ -176,10 +176,10 @@ func (b *testWorkerBackend) StateAtBlock(block *types.Block, reexec uint64, base
 func (b *testWorkerBackend) newRandomUncle() *types.Block {
 	var parent *types.Block
 	cur := b.chain.CurrentBlock()
-	if cur.NumberU64() == 0 {
+	if cur.Number.Uint64() == 0 {
 		parent = b.chain.Genesis()
 	} else {
-		parent = b.chain.GetBlockByHash(b.chain.CurrentBlock().ParentHash())
+		parent = b.chain.GetBlockByHash(b.chain.CurrentBlock().ParentHash)
 	}
 	blocks, _ := core.GenerateChain(b.chain.Config(), parent, b.chain.Engine(), b.db, 1, func(i int, gen *core.BlockGen) {
 		var addr = make([]byte, common.AddressLength)
@@ -607,21 +607,21 @@ func testGetSealingWork(t *testing.T, chainConfig *params.ChainConfig, engine co
 			b.chain.CurrentBlock().Hash(),
 			common.HexToAddress("0xdeadbeef"),
 			common.HexToHash("0xcafebabe"),
-			b.chain.CurrentBlock().NumberU64() + 1,
+			b.chain.CurrentBlock().Number.Uint64() + 1,
 			false,
 		},
 		{
 			b.chain.CurrentBlock().Hash(),
 			common.Address{},
 			common.HexToHash("0xcafebabe"),
-			b.chain.CurrentBlock().NumberU64() + 1,
+			b.chain.CurrentBlock().Number.Uint64() + 1,
 			false,
 		},
 		{
 			b.chain.CurrentBlock().Hash(),
 			common.Address{},
 			common.Hash{},
-			b.chain.CurrentBlock().NumberU64() + 1,
+			b.chain.CurrentBlock().Number.Uint64() + 1,
 			false,
 		},
 		{
diff --git a/tests/block_test_util.go b/tests/block_test_util.go
index 8da95a640a10..b74653ea6acc 100644
--- a/tests/block_test_util.go
+++ b/tests/block_test_util.go
@@ -154,7 +154,7 @@ func (t *BlockTest) Run(snapshotter bool) error {
 	}
 	// Cross-check the snapshot-to-hash against the trie hash
 	if snapshotter {
-		if err := chain.Snapshots().Verify(chain.CurrentBlock().Root()); err != nil {
+		if err := chain.Snapshots().Verify(chain.CurrentBlock().Root); err != nil {
 			return err
 		}
 	}
@@ -317,8 +317,8 @@ func (t *BlockTest) validateImportedHeaders(cm *core.BlockChain, validBlocks []b
 	// block-by-block, so we can only validate imported headers after
 	// all blocks have been processed by BlockChain, as they may not
 	// be part of the longest chain until last block is imported.
-	for b := cm.CurrentBlock(); b != nil && b.NumberU64() != 0; b = cm.GetBlockByHash(b.Header().ParentHash) {
-		if err := validateHeader(bmap[b.Hash()].BlockHeader, b.Header()); err != nil {
+	for b := cm.CurrentBlock(); b != nil && b.Number.Uint64() != 0; b = cm.GetBlockByHash(b.ParentHash).Header() {
+		if err := validateHeader(bmap[b.Hash()].BlockHeader, b); err != nil {
 			return fmt.Errorf("imported block header validation failed: %v", err)
 		}
 	}