1 files changed, 21 insertions, 0 deletions
diff --git a/pow/block.go b/pow/block.go
new file mode 100644
index 000000000..3bc63978b
--- /dev/null
+++ b/pow/block.go
@@ -0,0 +1,21 @@
+package pow
+
+import (
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/core/types"
+)
+
+type Block interface {
+	Difficulty() *big.Int
+	HashNoNonce() []byte
+	Nonce() uint64
+	MixDigest() []byte
+	SeedHash() []byte
+	NumberU64() uint64
+}
+
+type ChainManager interface {
+	GetBlockByNumber(uint64) *types.Block
+	CurrentBlock() *types.Block
+}