# Caver-js 오류 / ownerOf()

**URL:** <https://devforum.kaia.io/t/caver-js-ownerof/4806>\
**Category:** Caver\
**Created:** [4월 12, 2022, 6:58오전 UTC](https://devforum.kaia.io/t/caver-js-ownerof/4806 "2022-04-12T06:58:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dogfeed](https://avatars.discourse-cdn.com/v4/letter/d/51bf81/32.png) [@dogfeed](https://devforum.kaia.io/u/dogfeed)\
**Post date:** [4월 12, 2022, 6:58오전 UTC](https://devforum.kaia.io/t/caver-js-ownerof/4806/1 "2022-04-12T06:58:16Z")

</div>

Error: Invalid JSON RPC response: {“code”:1205800,“message”:“rps exceeded”,“requestId”:“b2b238a6-2cf4-9cee-8aa0-512ce7baf055”}  
at Object.InvalidResponse (/Users/taewonpark/Documents/GitHub/mirny-analytics/node\_modules/caver-js/packages/caver-core-helpers/src/errors.js:90:16)  
at /Users/taewonpark/Documents/GitHub/mirny-analytics/node\_modules/caver-js/packages/caver-core-requestmanager/src/index.js:159:44  
at XMLHttpRequest.request.onreadystatechange (/Users/taewonpark/Documents/GitHub/mirny-analytics/node\_modules/caver-js/packages/caver-core-requestmanager/caver-providers-http/src/index.js:122:13)  
at XMLHttpRequestEventTarget.dispatchEvent (/Users/taewonpark/Documents/GitHub/mirny-analytics/node\_modules/xhr2-cookies/dist/xml-http-request-event-target.js:34:22)  
at XMLHttpRequest.\_setReadyState (/Users/taewonpark/Documents/GitHub/mirny-analytics/node\_modules/xhr2-cookies/dist/xml-http-request.js:208:14)  
at XMLHttpRequest.\_onHttpResponseEnd (/Users/taewonpark/Documents/GitHub/mirny-analytics/node\_modules/xhr2-cookies/dist/xml-http-request.js:318:14)  
at IncomingMessage. (/Users/taewonpark/Documents/GitHub/mirny-analytics/node\_modules/xhr2-cookies/dist/xml-http-request.js:289:61)  
at IncomingMessage.emit (events.js:412:35)  
at endReadableNT (internal/streams/readable.js:1334:12)  
at processTicksAndRejections (internal/process/task\_queues.js:82:21)

제가 caver-js 로 ownerOf() 모듈을 사용해서 nft 홀더의 주소를 가져오는 코드를 실행하였는데  
지금까지 잘 되던게 위와같은 오류가 나오면서 실행이 안 되는 군요ㅠ

혹시 평소와 같이 caver-js 패키지 사용하시다가 생긴 오류 어떻게 해결하는지 아시는 분 계실까요??

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<div class="post-metadata">

**Author:** ![Denver](https://yyz1.discourse-cdn.com/flex035/user_avatar/devforum.kaia.io/denver/32/557_2.png) [@Denver](https://devforum.kaia.io/u/Denver)\
**Post date:** [4월 12, 2022, 7:13오전 UTC](https://devforum.kaia.io/t/caver-js-ownerof/4806/2 "2022-04-12T07:13:21Z")

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@dogfeed

안녕하세요.  
에러 메시지를 보면 rps exceeded 로 되어 있네요. rps는 보통 Request Per Second 의 약어로 많이 사용됩니다.

KAS를 사용 중이신 거 같은데 맞나요~? 혹은 KAS 퍼블릭노드를 사용중이신 거 같아요.  
초당 리퀘스트 제한에 걸리신 거 같으니 관련 문의는 카스 포럼으로 부탁드립니다 🙂

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