op-service: add RequestsHash to RPCHeader (ethereum-optimism#14022)

* add RequestsHash to op-service RPCHeader type

* sources.RPCHeader.RequestsHash needs "requestsHash" json struct tag

not "requestsHash" as in geth

* remove comment

This was fixed upstream ethereum/go-ethereum#30926

* add comment

* Update op-service/sources/types.go

Co-authored-by: protolambda <[email protected]>

---------

Co-authored-by: protolambda <[email protected]>

Author: 2 people

op-service/sources/types.go

@@ -61,6 +61,9 @@ type RPCHeader struct {
 	// ParentBeaconRoot was added by EIP-4788 and is ignored in legacy headers.
 	ParentBeaconRoot *common.Hash `json:"parentBeaconBlockRoot,omitempty"`
 
+	// RequestsHash was added by EIP-7685 and is ignored in legacy headers.
+	RequestsHash *common.Hash `json:"requestsHash,omitempty" rlp:"optional"`
+
 	// untrusted info included by RPC, may have to be checked
 	Hash common.Hash `json:"hash"`
 }
@@ -116,6 +119,8 @@ func (hdr *RPCHeader) CreateGethHeader() *types.Header {
 		BlobGasUsed:      (*uint64)(hdr.BlobGasUsed),
 		ExcessBlobGas:    (*uint64)(hdr.ExcessBlobGas),
 		ParentBeaconRoot: hdr.ParentBeaconRoot,
+		// Prague
+		RequestsHash: hdr.RequestsHash,
 	}
 }