diff --git a/blockchain/blockchain.go b/blockchain/blockchain.go
index 42d529b..67f4b72 100644
--- a/blockchain/blockchain.go
+++ b/blockchain/blockchain.go
@@ -230,7 +230,7 @@ func Blockchain_Start(params map[string]interface{}) (*Blockchain, error) {
 
 	//   logger.Fatalf("Testing complete quitting")
 
-	//go clean_up_valid_cache() // clean up valid cache
+	go clean_up_valid_cache() // clean up valid cache
 
 	/*  txlist := chain.Mempool.Mempool_List_TX()
 	    for i := range txlist {
@@ -1501,7 +1501,7 @@ func (chain *Blockchain) Rewind_Chain(rewind_count int) (result bool) {
 			panic(err)
 		}
 
-		if chain.IsBlockSyncBlockHeight(r.BLOCK_ID) || r.Height == 0 {
+		if chain.IsBlockSyncBlockHeight(r.BLOCK_ID) || r.Height == 1 {
 			break
 		}
 
diff --git a/blockchain/transaction_verify.go b/blockchain/transaction_verify.go
index 80a7b7b..53dd1be 100644
--- a/blockchain/transaction_verify.go
+++ b/blockchain/transaction_verify.go
@@ -105,14 +105,14 @@ func (chain *Blockchain) Verify_Transaction_Coinbase(cbl *block.Complete_Block,
 
 		if _, err := balance_tree.Get(minertx.MinerAddress[:]); err != nil {
 			//logger.Infof("balance not obtained err %s\n",err)
-			return false
+			//return false
 		} else {
 			return true
 		}
 
 	}
 
-	return true
+	return false
 }
 
 // all non miner tx must be non-coinbase tx
@@ -137,8 +137,17 @@ func (chain *Blockchain) Verify_Transaction_NonCoinbase(hf_version int64, tx *tr
 		return false
 	}
 
+	tx_hash = tx.GetHash()
+
 	if tx.TransactionType == transaction.REGISTRATION {
+		if _, ok := transaction_valid_cache.Load(tx_hash); ok {
+			return true //logger.Infof("Found in cache %s ",tx_hash)
+		} else {
+			//logger.Infof("TX not found in cache %s len %d ",tx_hash, len(tmp_buffer))
+		}
+
 		if tx.IsRegistrationValid() {
+			transaction_valid_cache.Store(tx_hash, time.Now()) // signature got verified, cache it
 			return true
 		}
 		return false
@@ -230,6 +239,12 @@ func (chain *Blockchain) Verify_Transaction_NonCoinbase(hf_version int64, tx *tr
 		panic("mentioned balance tree not found, cannot verify TX")
 	}
 
+	if _, ok := transaction_valid_cache.Load(tx_hash); ok {
+		return true //logger.Infof("Found in cache %s ",tx_hash)
+	} else {
+		//logger.Infof("TX not found in cache %s len %d ",tx_hash, len(tmp_buffer))
+	}
+
 	//logger.Infof("dTX  state tree has been found")
 
 	// now lets calculate CLn and CRn
@@ -251,6 +266,7 @@ func (chain *Blockchain) Verify_Transaction_NonCoinbase(hf_version int64, tx *tr
 
 	if tx.Proof.Verify(&tx.Statement, tx.GetHash()) {
 		//logger.Infof("dTX verified with proof successfuly")
+		transaction_valid_cache.Store(tx_hash, time.Now()) // signature got verified, cache it
 		return true
 	}
 	logger.Infof("transaction verification failed\n")
diff --git a/config/version.go b/config/version.go
index 9fefb1c..60f370a 100644
--- a/config/version.go
+++ b/config/version.go
@@ -20,4 +20,4 @@ import "github.com/blang/semver"
 
 // right now it has to be manually changed
 // do we need to include git commitsha??
-var Version = semver.MustParse("3.0.0-24.DEROHE.alpha+30122020")
+var Version = semver.MustParse("3.0.0-25.DEROHE.alpha+30122020")