feat(memo-fee): add a interface of memo fee

Author: zhang0125

actuator/src/main/java/org/tron/core/utils/ProposalUtil.java

@@ -580,9 +580,9 @@ public static void validator(DynamicPropertiesStore dynamicPropertiesStore,
           throw new ContractValidateException(
               "Bad chain parameter id [MEMO_FEE]");
         }
-        if (value < 1 || value > 1_000_000_000) {
+        if (value < 0 || value > 1_000_000_000) {
           throw new ContractValidateException(
-              "This value[MEMO_FEE] is only allowed to be in the range 1-1000_000_000");
+              "This value[MEMO_FEE] is only allowed to be in the range 0-1000_000_000");
         }
         break;
       }

chainbase/src/main/java/org/tron/core/store/DynamicPropertiesStore.java

@@ -188,6 +188,7 @@ public class DynamicPropertiesStore extends TronStoreWithRevoking<BytesCapsule>
       "ALLOW_HIGHER_LIMIT_FOR_MAX_CPU_TIME_OF_ONE_TX".getBytes();
 
   private static final byte[] MEMO_FEE = "MEMO_FEE".getBytes();
+  private static final byte[] MEMO_FEE_HISTORY = "MEMO_FEE_HISTORY".getBytes();
 
   @Autowired
   private DynamicPropertiesStore(@Value("properties") String dbName) {
@@ -863,7 +864,9 @@ private DynamicPropertiesStore(@Value("properties") String dbName) {
     try {
       this.getMemoFee();
     } catch (IllegalArgumentException e) {
-      this.saveMemoFee(CommonParameter.getInstance().getMemoFee());
+      long memoFee = CommonParameter.getInstance().getMemoFee();
+      this.saveMemoFee(memoFee);
+      this.saveMemoFeeHistory("0:" + memoFee);
     }
   }
 
@@ -2547,6 +2550,17 @@ public void saveMemoFee(long value) {
     this.put(MEMO_FEE, new BytesCapsule(ByteArray.fromLong(value)));
   }
 
+  public String getMemoFeeHistory() {
+    return Optional.ofNullable(getUnchecked(MEMO_FEE_HISTORY))
+        .map(BytesCapsule::getData)
+        .map(ByteArray::toStr)
+        .orElseThrow(() -> new IllegalArgumentException("not found MEMO_FEE_HISTORY"));
+  }
+
+  public void saveMemoFeeHistory(String value) {
+    this.put(MEMO_FEE_HISTORY, new BytesCapsule(ByteArray.fromString(value)));
+  }
+
   private static class DynamicResourceProperties {
 
     private static final byte[] ONE_DAY_NET_LIMIT = "ONE_DAY_NET_LIMIT".getBytes();

framework/src/main/java/org/tron/core/Wallet.java

@@ -4085,5 +4085,13 @@ public Block getBlock(GrpcAPI.BlockReq request) {
     return block.toBuilder().clearTransactions().build();
   }
 
+  public String getMemoFeePrices() {
+    try {
+      return chainBaseManager.getDynamicPropertiesStore().getMemoFeeHistory();
+    } catch (Exception e) {
+      logger.error("getMemoFeePrices failed, error is {}", e.getMessage());
+    }
+    return null;
+  }
 }
 

framework/src/main/java/org/tron/core/consensus/ProposalService.java

@@ -290,6 +290,10 @@ public static boolean process(Manager manager, ProposalCapsule proposalCapsule)
         }
         case MEMO_FEE: {
           manager.getDynamicPropertiesStore().saveMemoFee(entry.getValue());
+          // update memo fee history
+          manager.getDynamicPropertiesStore().saveMemoFeeHistory(
+              manager.getDynamicPropertiesStore().getMemoFeeHistory()
+                  + "," + proposalCapsule.getExpirationTime() + ":" + entry.getValue());
           break;
         }
         default:

framework/src/main/java/org/tron/core/services/http/FullNodeHttpApiService.java

@@ -293,6 +293,8 @@ public class FullNodeHttpApiService implements Service {
   private GetBandwidthPricesServlet getBandwidthPricesServlet;
   @Autowired
   private GetBlockServlet getBlockServlet;
+  @Autowired
+  private GetMemoFeePricesServlet getMemoFeePricesServlet;
 
   private static String getParamsFile(String fileName) {
     InputStream in = Thread.currentThread().getContextClassLoader()
@@ -542,6 +544,7 @@ public void start() {
       context.addServlet(new ServletHolder(getBandwidthPricesServlet),
           "/wallet/getbandwidthprices");
       context.addServlet(new ServletHolder(getBlockServlet), "/wallet/getblock");
+      context.addServlet(new ServletHolder(getMemoFeePricesServlet), "/wallet/getmemofee");
 
       int maxHttpConnectNumber = Args.getInstance().getMaxHttpConnectNumber();
       if (maxHttpConnectNumber > 0) {

framework/src/main/java/org/tron/core/services/http/GetMemoFeePricesServlet.java

@@ -0,0 +1,37 @@
+package org.tron.core.services.http;
+
+import com.alibaba.fastjson.JSONObject;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+import org.tron.core.Wallet;
+
+
+@Component
+@Slf4j(topic = "API")
+public class GetMemoFeePricesServlet extends RateLimiterServlet {
+
+  @Autowired
+  private Wallet wallet;
+
+  protected void doGet(HttpServletRequest request, HttpServletResponse response) {
+    try {
+      String reply = wallet.getMemoFeePrices();
+      if (reply != null) {
+        JSONObject jsonObject = new JSONObject();
+        jsonObject.put("prices", reply);
+        response.getWriter().println(jsonObject);
+      } else {
+        response.getWriter().println("{}");
+      }
+    } catch (Exception e) {
+      Util.processError(e, response);
+    }
+  }
+
+  protected void doPost(HttpServletRequest request, HttpServletResponse response) {
+    doGet(request, response);
+  }
+}