op-node: Add eth.HeaderBlockInfo

And use it in op-batcher.

op-batcher/batcher/driver.go

@@ -296,5 +296,5 @@ func (l *BatchSubmitter) l1Tip(ctx context.Context) (eth.L1BlockRef, error) {
 	if err != nil {
 		return eth.L1BlockRef{}, fmt.Errorf("getting latest L1 block: %w", err)
 	}
-	return eth.L1BlockRefFromHeader(head), nil
+	return eth.InfoToL1BlockRef(eth.HeaderBlockInfo(head)), nil
 }

op-node/eth/block_info.go

@@ -42,3 +42,44 @@ func ToBlockID(b NumberAndHash) BlockID {
 		Number: b.NumberU64(),
 	}
 }
+
+// headerBlockInfo is a conversion type of types.Header turning it into a
+// BlockInfo.
+type headerBlockInfo struct{ *types.Header }
+
+func (h headerBlockInfo) ParentHash() common.Hash {
+	return h.Header.ParentHash
+}
+
+func (h headerBlockInfo) Coinbase() common.Address {
+	return h.Header.Coinbase
+}
+
+func (h headerBlockInfo) Root() common.Hash {
+	return h.Header.Root
+}
+
+func (h headerBlockInfo) NumberU64() uint64 {
+	return h.Header.Number.Uint64()
+}
+
+func (h headerBlockInfo) Time() uint64 {
+	return h.Header.Time
+}
+
+func (h headerBlockInfo) MixDigest() common.Hash {
+	return h.Header.MixDigest
+}
+
+func (h headerBlockInfo) BaseFee() *big.Int {
+	return h.Header.BaseFee
+}
+
+func (h headerBlockInfo) ReceiptHash() common.Hash {
+	return h.Header.ReceiptHash
+}
+
+// HeaderBlockInfo returns h as a BlockInfo implementation.
+func HeaderBlockInfo(h *types.Header) BlockInfo {
+	return headerBlockInfo{h}
+}