cannot estimate gas; transaction may fail or may require manual gas limit

[mshahzadmalik1995]

Hi Team,

I am working on NFT part. I am getting this error when I am running this command yarn hardhat deploy --tags mint --network sepolia.
Kindly help me to solve this issue

Error: ERROR processing C:\Shahzad\NFT My practice\hardhat-nft-me\deploy\04-mint.js:
Error: cannot estimate gas; transaction may fail or may require manual gas limit [ See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT ] (reason="execution reverted: ERC721: token already minted", method="estimateGas", transaction={"from":"0xEE9bfE8DB8E4C3160A0f17C19B3774A5EC596E2E","to":"0x40987fB79CA69DD527745405683a8C0FEC5fFA82","data":"0x1e9308120000000000000000000000000000000000000000000000d8d726b7177a800000","accessList":null}, error={"name":"ProviderError","_stack":"ProviderError: execution reverted: ERC721: token already minted\n    at HttpProvider.request (C:\\Shahzad\\NFT My practice\\hardhat-nft-me\\node_modules\\hardhat\\src\\internal\\core\\providers\\http.ts:88:21)\n    at processTicksAndRejections (node:internal/process/task_queues:95:5)\n    at EthersProviderWrapper.send (C:\\Shahzad\\NFT My practice\\hardhat-nft-me\\node_modules\\@nomiclabs\\hardhat-ethers\\src\\internal\\ethers-provider-wrapper.ts:13:20)","code":3,"_isProviderError":true,"data":"0x08c379a00000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001c4552433732313a20746f6b656e20616c7265616479206d696e74656400000000"}, code=UNPREDICTABLE_GAS_LIMIT, version=providers/5.7.2) 
    at Logger.makeError (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\@ethersproject\logger\src.ts\index.ts:269:28)
    at Logger.throwError (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\@ethersproject\logger\src.ts\index.ts:281:20)
    at checkError (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\@ethersproject\providers\src.ts\json-rpc-provider.ts:78:20)      
    at EthersProviderWrapper.<anonymous> (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\@ethersproject\providers\src.ts\json-rpc-provider.ts:642:20)
    at step (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\@ethersproject\providers\lib\json-rpc-provider.js:48:23)
    at Object.throw (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\@ethersproject\providers\lib\json-rpc-provider.js:29:53)       
    at rejected (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\@ethersproject\providers\lib\json-rpc-provider.js:21:65)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at DeploymentsManager.executeDeployScripts (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\hardhat-deploy\src\DeploymentsManager.ts:1222:19)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at DeploymentsManager.runDeploy (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\hardhat-deploy\src\DeploymentsManager.ts:1052:5)
    at SimpleTaskDefinition.action (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\hardhat-deploy\src\index.ts:438:5)
    at Environment._runTaskDefinition (C:\Shahzad\NFT My practice\hardhat-nft-me\node_modules\hardhat\src\internal\core\runtime-environment.ts:330:14)

[mshahzadmalik1995]

const networkConfig = {
11155111 : {
name : "sepolia",
vrfCoordinatorV2:"0x8103B0A8A00be2DDC778e6e7eaa21791Cd364625",
entranceFee: ethers.utils.parseEther("0.01"),
gasLane: "0x474e34a077df58807dbe9c96d3c009b23b3c6d0cce433e59bbf5b34f823bc56c", // 30 gwei
subscriptionId: "798",
callbackGasLimit: "50000000",
interval: "30",
mintFee: "10000000000000000",
ethUsdPriceFeed: "0x694AA1769357215DE4FAC081bf1f309aDC325306",
},
default: {
name: "hardhat",
keepersUpdateInterval: "30",
mintFee: "10000000000000000",
ethUsdPriceFeed: "0x694AA1769357215DE4FAC081bf1f309aDC325306",
},
1337 : {
name: "localhost",
subscriptionId: "588",
entranceFee: ethers.utils.parseEther("0.1"),
gasLane: "0x474e34a077df58807dbe9c96d3c009b23b3c6d0cce433e59bbf5b34f823bc56c", // 30 gwei
callbackGasLimit: "50000000",
interval: "30",
mintFee: "10000000000000000",
ethUsdPriceFeed: "0x694AA1769357215DE4FAC081bf1f309aDC325306",
}
}

const developmentChains = ["hardhat", "localhost"]

helper-hardhat-config.js

module.exports = {
networkConfig,
developmentChains
}

[alymurtazamemon]

@mshahzadmalik1995 It throws execution reverted: ERC721: token already minted error, which means the token id you are trying to mint is already minted, because this is erc721 you cannot mint the same nft twice.

[mshahzadmalik1995]

@alymurtazamemon What I do now in this case?

[alymurtazamemon]

@mshahzadmalik1995 You can update the token id.

[mshahzadmalik1995]

@alymurtazamemon Kindly find the repo https://github.com/mshahzadmalik1995/hardhat-nft-me.git