Caver-java getPastEvent 호출 질문

한국어🇰🇷 Caver
1

안녕하세요.

배포한 컨트렉트의 모든 거래이력을 DB화 하기 위해 "getBlockByNumber"를 사용하여 배포한 컨트랙트가 아닌 블록도 조회하고 그 블록을 하나씩 확인하는 방식으로 DB화를 하고 있습니다.

배치를 사용하여 조회하고 있는데 조회량이 많은 것 같고 앞으로 운영유지비가 증가될거 같아
배포한 컨트랙트의 거래내역(transfer, approve, burn 등)만 확인하고 싶어 검색하던 중 "getPastEvent"을 발견하고 테스트를 해봤습니다.

참고링크를 확인해서

KlayLogFilter filter = new KlayLogFilter(DefaultBlockParameterName.EARLIEST, DefaultBlockParameterName.LATEST, rksContractAddress, null);

로 호출하였는데 readTimeOut이 발생했었습니다.

그래서 아래와 같이 소스를 바꾸고 호출했을 때

KlayLogFilter filter = new KlayLogFilter();
        filter.setFromBlock(new BigInteger("131708286"));
        filter.setToBlock(DefaultBlockParameterName.LATEST);

        KlayLogs logs = contract.getPastEvent("transfer", filter);

아래와 같은 오류가 발생했습니다.

java.lang.NullPointerException: transfer event is not exist.

	at com.klaytn.caver.contract.Contract.getEvent(Contract.java:839)
	at com.klaytn.caver.contract.Contract.getPastEvent(Contract.java:322)
	at io.mcc.mcctoken.klaytn.RoleBasedKeyUtilsExample.getEventTrace(testClass.java:XXX)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
	at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
	at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)
	at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)
	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)
	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:232)
	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:55)

어떤 부분이 문제인지 문의드립니다.

2

다시 분석해서 해결되었습니다
정상적으로 데이터를 가져오는거 확인했습니다

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