finally merged *the missing*

core/block_cache.go

@@ -66,3 +66,8 @@ func (bc *BlockCache) Get(hash common.Hash) *types.Block {
 
 	return nil
 }
+
+func (bc *BlockCache) Has(hash common.Hash) bool {
+	_, ok := bc.blocks[hash]
+	return ok
+}

core/events.go

@@ -38,6 +38,10 @@ type PendingBlockEvent struct {
 	Logs  state.Logs
 }
 
+type ChainUncleEvent struct {
+	Block *types.Block
+}
+
 type ChainHeadEvent struct{ Block *types.Block }
 
 // Mining operation events