Getting an error while calling a function of a smart contract

[0x471]

Hi everyone,

I deployed this token on binance smart chain testnet. I'm trying to call changeAdmin function of this contract using etherjs but getting an error.

the command that I execute
yarn hardhat run --network testnet scripts/bypass.js

hardhat.config.js

.....testnet: {
  url: "https://data-seed-prebsc-1-s1.binance.org:8545",
  chainId: 97,
  gasPrice: 20000000000,
},......

the script

const ethers = require('ethers')


async function main() {
    let network = 'https://data-seed-prebsc-1-s1.binance.org:8545/'
    let provider = ethers.getDefaultProvider(network)
    let privKey = "PRIVATE-KEY"
    let wallet = new ethers.Wallet(privKey, provider)

    let contractAddr = "0x066229c2D5E3673186b756a6c1f3C8689560B474" 
    let contractABI = ABI-OF-THE-CONTRACT
    let contract = new ethers.Contract(contractAddr, contractABI, provider)

    let contractWithWallet = contract.connect(wallet)
    let newOwnerAddr = "0xCc2c513ef320db14fc01b4a828EF548DAfF51429"
    let txResponse= await  contractWithWallet.changeAdmin(newOwnerAddr)
    let txReceipt = await txResponse.wait()
    console.log(txReceipt)


}

main()
    .catch((error) => {
        console.error(error)
        process.exit(1)
    })

the error i encountered
reason: 'cannot estimate gas; transaction may fail or may require manual gas limit',
code: 'UNPREDICTABLE_GAS_LIMIT',

Thanks in advance, have a nice day :)

[zemse]

I looked at the trace of your tx, and it seems it's doing a delegate call to the token implementation and it reverts immediately. Is there a method called changeAdmin in your token? I guess no since it's in your proxy.

Are you using openzeppelin's transparent proxy pattern? You need to use the proxyAdmin for doing any changeAdmin. Any calls from address other than the proxyAdmin are forwarded to the implementation.

[0x471]

Thanks for your answer. Yes I'm using the proxyAdmin (0xa9c8f32bb529cac9639402a05f6324087855f515 address)

[zemse]

Your proxy admin is actually 0xB38D5FaC60b42fc99fE1634743144b2c01B10Faa. And in order to change the admin you have to use changeProxyAdmin method on it.

[0x471]

I understood, thanks for your help

[Mehrnazibi]

Thanks for your answer. Yes I'm using the proxyAdmin (0xa9c8f32bb529cac9639402a05f6324087855f515 address)