# KAS (Archive) **URL:** https://devforum.kaia.io/c/english/kas-archive/50.md [최신](https://devforum.kaia.io/latest.md) · [카테고리](https://devforum.kaia.io/categories.md) · [태그](https://devforum.kaia.io/tags.md) --- ## [About the KAS (Archive) category](https://devforum.kaia.io/t/about-the-kas-archive-category/5244)
**Author:** [@terri\_tory](https://devforum.kaia.io/u/terri_tory)\ **댓글:** 0
--- ## [Notice of KAS Forum Migration / KAS Forum 이관 공지](https://devforum.kaia.io/t/notice-of-kas-forum-migration-kas-forum/3724)
**Author:** [@Aidan](https://devforum.kaia.io/u/Aidan)\ **댓글:** 0\ **마지막 업데이트:** [2월 11, 2022, 8:51오전 UTC](https://devforum.kaia.io/t/notice-of-kas-forum-migration-kas-forum/3724 "2022-02-11T08:51:39Z")
Dear Customer, This is Klaytn API Service Team. We would first like to express our deepest appreciation for using our service. KAS developer forum will be moved from Klaytn Forum to a separate forum page provided by K… --- ## [JSON RPC request error with ethers.js v6](https://devforum.kaia.io/t/json-rpc-request-error-with-ethers-js-v6/6774)
**Author:** [@You\_We\_Cho](https://devforum.kaia.io/u/You_We_Cho)\ **댓글:** 0\ **마지막 업데이트:** [5월 26, 2023, 5:14오전 UTC](https://devforum.kaia.io/t/json-rpc-request-error-with-ethers-js-v6/6774 "2023-05-26T05:14:53Z")
Next JS code returns error with ethers.js v6. I have no clue whether it’s from ethers.js usage or request parameter for Klaytn. == SOURCE CODE == const headers = { ‘authorization’: AUTH, ‘x-chain-id’: ‘1001’ }; le… --- ## [Can not deploy smartcontract with truffle and KAS endpoint](https://devforum.kaia.io/t/can-not-deploy-smartcontract-with-truffle-and-kas-endpoint/4701)
**Author:** [@Toan\_Nguyen](https://devforum.kaia.io/u/Toan_Nguyen)\ **댓글:** 1\ **마지막 업데이트:** [4월 21, 2022, 2:23오전 UTC](https://devforum.kaia.io/t/can-not-deploy-smartcontract-with-truffle-and-kas-endpoint/4701 "2022-04-21T02:23:57Z")
I get errors like this when deploying smartcontract by truffle using KAS endpoint. Is there anyone getting error like this. Used truffle network: klay\_mainnet: { provider: () =\> { const option = { … --- ## [Unable to establish an RPC connection to baobab environment](https://devforum.kaia.io/t/unable-to-establish-an-rpc-connection-to-baobab-environment/4403)
**Author:** [@bruce\_riley](https://devforum.kaia.io/u/bruce_riley)\ **댓글:** 1\ **마지막 업데이트:** [3월 17, 2022, 11:56오후 UTC](https://devforum.kaia.io/t/unable-to-establish-an-rpc-connection-to-baobab-environment/4403 "2022-03-17T23:56:20Z")
I am trying to establish an rpc connection to the baobab environment using the klaytn go library (v1.7.3) . I am calling klay\_client.DialContext() passing in a url that looks like this: wss://:@node-api.klaytnapi.com/v1… --- ## [Android, retrieving user's owned ERC-721 token](https://devforum.kaia.io/t/android-retrieving-users-owned-erc-721-token/3660)
**Author:** [@Kebinou](https://devforum.kaia.io/u/Kebinou)\ **댓글:** 2\ **마지막 업데이트:** [2월 11, 2022, 2:06오전 UTC](https://devforum.kaia.io/t/android-retrieving-users-owned-erc-721-token/3660 "2022-02-11T02:06:06Z")
안녕하세요, First of all I’d like to apologize, my Korean is not good enough to post my question in that language, I hope english is allowed to be used here. I deployed an ERC-721 token on the Cypress network. My goal is f… --- ## [Retrieve private key of account in Account pools](https://devforum.kaia.io/t/retrieve-private-key-of-account-in-account-pools/2505)
**Author:** [@Julien](https://devforum.kaia.io/u/Julien)\ **댓글:** 1\ **마지막 업데이트:** [11월 28, 2021, 11:54오후 UTC](https://devforum.kaia.io/t/retrieve-private-key-of-account-in-account-pools/2505 "2021-11-28T23:54:45Z")
Hello, I would like to know if it is possible to retrieve the private key of an account created in account pools ? I cannot find or a missed the information in documentation: KAS Reference Documentation I know that it… --- ## ['https://node-api.klaytnapi.com/v1/klaytn' return very slow](https://devforum.kaia.io/t/https-node-api-klaytnapi-com-v1-klaytn-return-very-slow/771)
**Author:** [@wwg](https://devforum.kaia.io/u/wwg)\ **댓글:** 1\ **마지막 업데이트:** [3월 22, 2021, 2:55오후 UTC](https://devforum.kaia.io/t/https-node-api-klaytnapi-com-v1-klaytn-return-very-slow/771 "2021-03-22T14:55:19Z")
time curl -X POST ‘https://node-api.klaytnapi.com/v1/klaytn’ --user xxxx --header ‘x-chain-id: 8217’ --header ‘Content-Type: application/json’ --data ‘{“jsonrpc”:“2.0”,“method”:“eth\_blockNumber”,“params”:\[\],“id”:…