core: implement BLOBBASEFEE opcode (0x4a) (#28098)

Implements "EIP-7516: BLOBBASEFEE opcode" for cancun, as per spec: https://eips.ethereum.org/EIPS/eip-7516

internal/ethapi/api.go

@@ -991,13 +991,14 @@ func (diff *StateOverride) Apply(state *state.StateDB) error {
 
 // BlockOverrides is a set of header fields to override.
 type BlockOverrides struct {
-	Number     *hexutil.Big
-	Difficulty *hexutil.Big
-	Time       *hexutil.Uint64
-	GasLimit   *hexutil.Uint64
-	Coinbase   *common.Address
-	Random     *common.Hash
-	BaseFee    *hexutil.Big
+	Number      *hexutil.Big
+	Difficulty  *hexutil.Big
+	Time        *hexutil.Uint64
+	GasLimit    *hexutil.Uint64
+	Coinbase    *common.Address
+	Random      *common.Hash
+	BaseFee     *hexutil.Big
+	BlobBaseFee *hexutil.Big
 }
 
 // Apply overrides the given header fields into the given block context.
@@ -1026,6 +1027,9 @@ func (diff *BlockOverrides) Apply(blockCtx *vm.BlockContext) {
 	if diff.BaseFee != nil {
 		blockCtx.BaseFee = diff.BaseFee.ToInt()
 	}
+	if diff.BlobBaseFee != nil {
+		blockCtx.BlobBaseFee = diff.BlobBaseFee.ToInt()
+	}
 }
 
 // ChainContextBackend provides methods required to implement ChainContext.