fix review

Author: Little-Peony

chainbase/src/main/java/org/tron/core/db2/core/Chainbase.java

@@ -35,7 +35,7 @@ public enum Cursor {
   //true:fullnode, false:soliditynode
   private ThreadLocal<Cursor> cursor = new ThreadLocal<>();
   private ThreadLocal<Long> offset = new ThreadLocal<>();
-  private Snapshot head;
+  private volatile Snapshot head;
 
   public Chainbase(Snapshot head) {
     this.head = head;

framework/src/main/java/org/tron/core/services/jsonrpc/TronJsonRpcImpl.java

@@ -297,6 +297,7 @@ public String web3Sha3(String data) throws JsonRpcInvalidParamsException {
   @Override
   public String ethGetBlockTransactionCountByHash(String blockHash)
       throws JsonRpcInvalidParamsException {
+    validateBlockNumOrHashOrTag(blockHash);
     Block b = getBlockByJsonHash(blockHash);
     if (b == null) {
       return null;
@@ -535,6 +536,7 @@ private String call(byte[] ownerAddressByte, byte[] contractAddressByte, long va
   @Override
   public String getStorageAt(String address, String storageIdx, String blockNumOrTag)
       throws JsonRpcInvalidParamsException {
+    validateBlockNumOrHashOrTag(blockNumOrTag);
     if (EARLIEST_STR.equalsIgnoreCase(blockNumOrTag)
         || PENDING_STR.equalsIgnoreCase(blockNumOrTag)
         || FINALIZED_STR.equalsIgnoreCase(blockNumOrTag)) {
@@ -565,6 +567,7 @@ public String getStorageAt(String address, String storageIdx, String blockNumOrT
   @Override
   public String getABIOfSmartContract(String contractAddress, String blockNumOrTag)
       throws JsonRpcInvalidParamsException {
+    validateBlockNumOrHashOrTag(blockNumOrTag);
     if (EARLIEST_STR.equalsIgnoreCase(blockNumOrTag)
         || PENDING_STR.equalsIgnoreCase(blockNumOrTag)
         || FINALIZED_STR.equalsIgnoreCase(blockNumOrTag)) {
@@ -779,6 +782,7 @@ private TransactionResult getTransactionByBlockAndIndex(Block block, String inde
   @Override
   public TransactionResult getTransactionByBlockHashAndIndex(String blockHash, String index)
       throws JsonRpcInvalidParamsException {
+    validateBlockNumOrHashOrTag(blockHash);
     final Block block = getBlockByJsonHash(blockHash);
 
     if (block == null) {