all: change chain head markers from block to header (#26777)

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
 	}

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()