refactor(config): add reference.conf and remove bean DEFAULTS

Add common/src/main/resources/reference.conf as the standard Typesafe
Config default file, providing fallback values for all configuration
parameters. This eliminates hardcoded DEFAULTS maps from bean classes
and centralizes default values in a single, maintainable file.

- Create reference.conf with full default configuration matching
  existing code behavior (gRPC defaults, committee zeros, etc.)
- Remove DEFAULTS from all bean classes (VmConfig, BlockConfig, etc.)
- Add withFallback(defaultReference()) in Configuration.java
- Convert dot-notation fields to sub-beans in NodeConfig
- Add index.directory/switch to reference.conf (legacy, unused)
- Add storage.backup section to reference.conf
- Update all bean tests to use withRef() helper with defaultReference()
- Fix ArgsTest to include defaultReference() fallback

Author: vividctrlalt

common/src/main/java/org/tron/core/config/Configuration.java

@@ -48,7 +48,8 @@ public static com.typesafe.config.Config getByFileName(
 
   private static void resolveConfigFile(String fileName, File confFile) {
     if (confFile.exists()) {
-      config = ConfigFactory.parseFile(confFile);
+      config = ConfigFactory.parseFile(confFile)
+          .withFallback(ConfigFactory.defaultReference());
     } else if (Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName)
         != null) {
       config = ConfigFactory.load(fileName);

common/src/main/java/org/tron/core/config/args/BlockConfig.java

@@ -7,7 +7,6 @@
 
 import com.typesafe.config.Config;
 import com.typesafe.config.ConfigBeanFactory;
-import com.typesafe.config.ConfigFactory;
 import lombok.Getter;
 import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
@@ -26,12 +25,7 @@ public class BlockConfig {
   private long proposalExpireTime = DEFAULT_PROPOSAL_EXPIRE_TIME;
   private int checkFrozenTime = 1;
 
-  private static final Config DEFAULTS = ConfigFactory.parseString(
-      "needSyncCheck = false\n"
-          + "maintenanceTimeInterval = 21600000\n"
-          + "proposalExpireTime = " + DEFAULT_PROPOSAL_EXPIRE_TIME + "\n"
-          + "checkFrozenTime = 1\n"
-  );
+  // Defaults come from reference.conf (loaded globally via Configuration.java)
 
   /**
    * Create BlockConfig from the "block" section of the application config.
@@ -44,9 +38,7 @@ public static BlockConfig fromConfig(Config config) {
           + "config.conf, please set the value in block.proposalExpireTime.", PARAMETER_INIT);
     }
 
-    Config blockSection = config.hasPath("block")
-        ? config.getConfig("block").withFallback(DEFAULTS)
-        : DEFAULTS;
+    Config blockSection = config.getConfig("block");
     BlockConfig blockConfig = ConfigBeanFactory.create(blockSection, BlockConfig.class);
     blockConfig.postProcess();
     return blockConfig;

common/src/main/java/org/tron/core/config/args/CommitteeConfig.java

@@ -2,7 +2,6 @@
 
 import com.typesafe.config.Config;
 import com.typesafe.config.ConfigBeanFactory;
-import com.typesafe.config.ConfigFactory;
 import lombok.Getter;
 import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
@@ -84,57 +83,7 @@ public class CommitteeConfig {
 
   // proposalExpireTime is NOT a committee field — it's in block.* and handled by BlockConfig
 
-  private static final Config DEFAULTS;
-
-  static {
-    StringBuilder sb = new StringBuilder();
-    sb.append("allowCreationOfContracts = 0\n");
-    sb.append("allowMultiSign = 0\n");
-    sb.append("allowAdaptiveEnergy = 0\n");
-    sb.append("allowDelegateResource = 0\n");
-    sb.append("allowSameTokenName = 0\n");
-    sb.append("allowTvmTransferTrc10 = 0\n");
-    sb.append("allowTvmConstantinople = 0\n");
-    sb.append("allowTvmSolidity059 = 0\n");
-    sb.append("forbidTransferToContract = 0\n");
-    sb.append("allowShieldedTRC20Transaction = 0\n");
-    sb.append("allowMarketTransaction = 0\n");
-    sb.append("allowTransactionFeePool = 0\n");
-    sb.append("allowBlackHoleOptimization = 0\n");
-    sb.append("allowNewResourceModel = 0\n");
-    sb.append("allowTvmIstanbul = 0\n");
-    sb.append("allowProtoFilterNum = 0\n");
-    sb.append("allowAccountStateRoot = 0\n");
-    sb.append("changedDelegation = 0\n");
-    sb.append("allowPBFT = 0\n");
-    sb.append("pBFTExpireNum = 20\n");
-    sb.append("allowTvmFreeze = 0\n");
-    sb.append("allowTvmVote = 0\n");
-    sb.append("allowTvmLondon = 0\n");
-    sb.append("allowTvmCompatibleEvm = 0\n");
-    sb.append("allowHigherLimitForMaxCpuTimeOfOneTx = 0\n");
-    sb.append("allowNewRewardAlgorithm = 0\n");
-    sb.append("allowOptimizedReturnValueOfChainId = 0\n");
-    sb.append("allowTvmShangHai = 0\n");
-    sb.append("allowOldRewardOpt = 0\n");
-    sb.append("allowEnergyAdjustment = 0\n");
-    sb.append("allowStrictMath = 0\n");
-    sb.append("consensusLogicOptimization = 0\n");
-    sb.append("allowTvmCancun = 0\n");
-    sb.append("allowTvmBlob = 0\n");
-    sb.append("unfreezeDelayDays = 0\n");
-    sb.append("allowReceiptsMerkleRoot = 0\n");
-    sb.append("allowAccountAssetOptimization = 0\n");
-    sb.append("allowAssetOptimization = 0\n");
-    sb.append("allowNewReward = 0\n");
-    sb.append("memoFee = 0\n");
-    sb.append("allowDelegateOptimization = 0\n");
-    sb.append("allowDynamicEnergy = 0\n");
-    sb.append("dynamicEnergyThreshold = 0\n");
-    sb.append("dynamicEnergyIncreaseFactor = 0\n");
-    sb.append("dynamicEnergyMaxFactor = 0\n");
-    DEFAULTS = ConfigFactory.parseString(sb.toString());
-  }
+  // Defaults come from reference.conf (loaded globally via Configuration.java)
 
   /**
    * Create CommitteeConfig from the "committee" section of the application config.
@@ -144,9 +93,7 @@ public class CommitteeConfig {
    * are excluded from automatic binding and handled manually after.
    */
   public static CommitteeConfig fromConfig(Config config) {
-    Config section = config.hasPath("committee")
-        ? config.getConfig("committee").withFallback(DEFAULTS)
-        : DEFAULTS;
+    Config section = config.getConfig("committee");
 
     // ConfigBeanFactory derives key names from setter methods. For setPBFTExpireNum()
     // it expects "PBFTExpireNum" (capital P), but config.conf uses "pBFTExpireNum".

common/src/main/java/org/tron/core/config/args/EventConfig.java

@@ -68,21 +68,7 @@ public static class FilterConfig {
     private List<String> contractTopic = new ArrayList<>();
   }
 
-  private static final Config DEFAULTS = ConfigFactory.parseString(
-      "enable = false\n"
-          + "version = 0\n"
-          + "startSyncBlockNum = 0\n"
-          + "path = \"\"\n"
-          + "server = \"\"\n"
-          + "dbconfig = \"\"\n"
-          + "contractParse = true\n"
-          + "native { useNativeQueue = true, bindport = 5555, sendqueuelength = 1000 }\n"
-          + "topics = []\n"
-          + "topicDefaults { triggerName = \"\", enable = false, topic = \"\","
-          + " solidified = false, ethCompatible = false, redundancy = false }\n"
-          + "filter { fromblock = \"\", toblock = \"\","
-          + " contractAddress = [\"\"], contractTopic = [\"\"] }\n"
-  );
+  // Defaults come from reference.conf (loaded globally via Configuration.java)
 
   /**
    * Create EventConfig from the "event.subscribe" section of the application config.
@@ -91,9 +77,7 @@ public static class FilterConfig {
    * "nativeQueue" but config key is "native". We handle this manually after binding.
    */
   public static EventConfig fromConfig(Config config) {
-    Config section = config.hasPath("event.subscribe")
-        ? config.getConfig("event.subscribe").withFallback(DEFAULTS)
-        : DEFAULTS;
+    Config section = config.getConfig("event.subscribe");
 
     // "native" is a Java reserved word, "topics" has optional fields per item —
     // strip both before binding, read manually

common/src/main/java/org/tron/core/config/args/GenesisConfig.java

@@ -2,7 +2,6 @@
 
 import com.typesafe.config.Config;
 import com.typesafe.config.ConfigBeanFactory;
-import com.typesafe.config.ConfigFactory;
 import java.util.ArrayList;
 import java.util.List;
 import lombok.Getter;
@@ -42,18 +41,10 @@ public static class WitnessConfig {
     private long voteCount = 0;
   }
 
-  private static final Config DEFAULTS = ConfigFactory.parseString(
-      "timestamp = \"\"\n"
-          + "parentHash = \"\"\n"
-          + "assets = []\n"
-          + "witnesses = []\n"
-  );
+  // Defaults come from reference.conf (loaded globally via Configuration.java)
 
   public static GenesisConfig fromConfig(Config config) {
-    if (!config.hasPath("genesis.block")) {
-      return new GenesisConfig();
-    }
-    Config section = config.getConfig("genesis.block").withFallback(DEFAULTS);
+    Config section = config.getConfig("genesis.block");
     return ConfigBeanFactory.create(section, GenesisConfig.class);
   }
 }

common/src/main/java/org/tron/core/config/args/MetricsConfig.java

@@ -2,7 +2,6 @@
 
 import com.typesafe.config.Config;
 import com.typesafe.config.ConfigBeanFactory;
-import com.typesafe.config.ConfigFactory;
 import lombok.Getter;
 import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
@@ -36,20 +35,13 @@ public static class InfluxDbConfig {
     private int metricsReportInterval = 10;
   }
 
-  private static final Config DEFAULTS = ConfigFactory.parseString(
-      "storageEnable = false\n"
-          + "prometheus { enable = false, port = 9527 }\n"
-          + "influxdb { ip = \"\", port = 8086, database = metrics,"
-          + " metricsReportInterval = 10 }\n"
-  );
+  // Defaults come from reference.conf (loaded globally via Configuration.java)
 
   /**
    * Create MetricsConfig from the "node.metrics" section of the application config.
    */
   public static MetricsConfig fromConfig(Config config) {
-    Config section = config.hasPath("node.metrics")
-        ? config.getConfig("node.metrics").withFallback(DEFAULTS)
-        : DEFAULTS;
+    Config section = config.getConfig("node.metrics");
     return ConfigBeanFactory.create(section, MetricsConfig.class);
   }
 }