feat(core/types): header copy hooks

Author: qdm12

core/types/block.go

@@ -277,8 +277,7 @@ func NewBlockWithWithdrawals(header *Header, txs []*Transaction, uncles []*Heade
 	return b.WithWithdrawals(withdrawals)
 }
 
-// CopyHeader creates a deep copy of a block header.
-func CopyHeader(h *Header) *Header {
+func copyHeader(h *Header) *Header {
 	cpy := *h
 	if cpy.Difficulty = new(big.Int); h.Difficulty != nil {
 		cpy.Difficulty.Set(h.Difficulty)

core/types/block.libevm.go

@@ -32,6 +32,7 @@ type HeaderHooks interface {
 	UnmarshalJSON(*Header, []byte) error //nolint:govet
 	EncodeRLP(*Header, io.Writer) error
 	DecodeRLP(*Header, *rlp.Stream) error
+	Copy(*Header) *Header
 }
 
 // hooks returns the Header's registered HeaderHooks, if any, otherwise a
@@ -108,3 +109,12 @@ func (*NOOPHeaderHooks) DecodeRLP(h *Header, s *rlp.Stream) error {
 	type withoutMethods Header
 	return s.Decode((*withoutMethods)(h))
 }
+
+func (n *NOOPHeaderHooks) Copy(h *Header) *Header {
+	return copyHeader(h)
+}
+
+// CopyHeader creates a deep copy of a block header.
+func CopyHeader(h *Header) *Header {
+	return h.hooks().Copy(h)
+}

core/types/block.libevm_test.go

@@ -75,6 +75,10 @@ func (hh *stubHeaderHooks) DecodeRLP(h *Header, s *rlp.Stream) error {
 	return hh.errDecode
 }
 
+func (hh *stubHeaderHooks) Copy(h *Header) *Header {
+	return h
+}
+
 func TestHeaderHooks(t *testing.T) {
 	TestOnlyClearRegisteredExtras()
 	defer TestOnlyClearRegisteredExtras()