Update to follow DB spec

common/block.go

@@ -0,0 +1,15 @@
+package common
+
+import (
+	"time"
+
+	eth "github.com/ethereum/go-ethereum/common"
+)
+
+// Block represents of an Ethereum block
+type Block struct {
+	EthBlockNum uint64
+	Timestamp   time.Time
+	Hash        eth.Hash
+	PrevHash    eth.Hash
+}