Invalid JSON RPC response: {"code":1034210,"message":"Unsupported method - klay_sign","requestId":"ddec07a3-0ec0-9de3-9736-73a78206fde4"}

한국어🇰🇷 Caver
,
1

안녕하세요
아래와 같이 함수를 실행하는 데
Invalid JSON RPC response: {“code”:1034210,“message”:“Unsupported method - klay_sign”,“requestId”:“ddec07a3-0ec0-9de3-9736-73a78206fde4”}
에러가 나오면서 실패합니다. 실패 원인이 뭘까요…?

const Caver = require(‘caver-js’)
const option = {
headers: [
{
name: ‘Authorization’,
value: Basic ${Buffer.from(${accessKeyId}:${secretAccessKey}).toString('base64')},
},
{ name: ‘x-chain-id’, value: chainId },
],
}
const caver = new Caver(new Caver.providers.HttpProvider(nodeApiUrl, option))
const deployerKeyring = caver.wallet.keyring.create(deployerAddress, deployerPrivateKey)
caver.wallet.add(deployerKeyring)

var hash = caver.utils.soliditySha3(
{ t: ‘address’, v: contractAddress },
{ t: ‘uint256’, v: amount }).toString(“hex”);

const msg = await caver.rpc.klay.sign(deployerAddress, hash) //에러 발생 시점

** node js 버전 : 16.18.1