func(event): optimize energy price querying method

Author: yanghang8612

framework/src/main/java/org/tron/core/services/event/BlockEventGet.java

@@ -39,6 +39,7 @@
 import org.tron.core.exception.BadItemException;
 import org.tron.core.services.event.bo.BlockEvent;
 import org.tron.core.services.event.bo.SmartContractTrigger;
+import org.tron.core.services.jsonrpc.JsonRpcApiUtil;
 import org.tron.core.store.StoreFactory;
 import org.tron.protos.Protocol;
 import org.tron.protos.contract.SmartContractOuterClass;
@@ -373,19 +374,7 @@ public List<TransactionLogTriggerCapsule> getTransactionLogTrigger(BlockCapsule
 
   public long getEnergyPrice(long blockTime) {
     String energyPriceHistory = manager.getDynamicPropertiesStore().getEnergyPriceHistory();
-
-    String[] energyPrices = energyPriceHistory.split(",");
-    String[] lastPrice = energyPrices[energyPrices.length - 1].split(":");
-    long energyPrice = Long.parseLong(lastPrice[1]);
-
-    for (int i = 1; i < energyPrices.length; i++) {
-      long effectiveTime = Long.parseLong(energyPrices[i].split(":")[0]);
-      if (blockTime < effectiveTime) {
-        energyPrice = Long.parseLong(energyPrices[i - 1].split(":")[1]);
-        break;
-      }
-    }
-    return energyPrice;
+    return JsonRpcApiUtil.parseEnergyFee(blockTime, energyPriceHistory);
   }
 
   public List<TransactionLogTriggerCapsule> getTransactionTriggers(BlockCapsule block,

framework/src/test/java/org/tron/core/event/BlockEventGetTest.java

@@ -150,6 +150,11 @@ public void test() throws Exception {
     });
     manager.pushBlock(blockCapsule);
 
+    // Set energy price history to test boundary cases
+    manager.getDynamicPropertiesStore().saveEnergyPriceHistory(
+        manager.getDynamicPropertiesStore().getEnergyPriceHistory()
+            + "," + time + ":210");
+
     EventPluginConfig config = new EventPluginConfig();
     config.setSendQueueLength(1000);
     config.setBindPort(5555);
@@ -187,6 +192,12 @@ public void test() throws Exception {
     try {
       BlockEvent blockEvent = blockEventGet.getBlockEvent(1);
       Assert.assertNotNull(blockEvent);
+      Assert.assertEquals(1, blockEvent.getTransactionLogTriggerCapsules().size());
+
+      // Here energy unit price should be 100 not 210,
+      // cause block time is equal to 210`s effective time
+      Assert.assertEquals(100, blockEvent.getTransactionLogTriggerCapsules()
+          .get(0).getTransactionLogTrigger().getEnergyUnitPrice());
     } catch (Exception e) {
       Assert.fail();
     }