use transaction.rollback in debug, hunter, and dumper

premix/debug.nim

@@ -30,6 +30,7 @@ proc executeBlock(blockEnv: JsonNode, memoryDB: TrieDatabaseRef, blockNumber: Ui
   else:
     info "block validation success", validationResult, blockNumber
 
+  transaction.rollback()
   dumpDebuggingMetaData(chainDB, header, body, vmState, false)
   let
     fileName = "debug" & $blockNumber & ".json"

premix/dumper.nim

@@ -29,6 +29,7 @@ proc dumpDebug(chainDB: BaseChainDB, blockNumber: Uint256) =
   captureChainDB.setHead(parent, true)
   let validationResult = processBlock(captureChainDB, parent, header, body, vmState)
 
+  transaction.rollback()
   dumpDebuggingMetaData(captureChainDB, header, body, vmState, false)
 
 proc main() =

premix/hunter.nim

@@ -75,6 +75,7 @@ proc huntProblematicBlock(blockNumber: Uint256): ValidationResult =
     validationResult = processBlock(chainDB, parentBlock.header, thisBlock.header, thisBlock.body, vmState)
 
   if validationResult != ValidationResult.OK:
+    transaction.rollback()
     dumpDebuggingMetaData(chainDB, thisBlock.header, thisBlock.body, vmState, false)
 
   result = validationResult