Error cannot estimate gas #1365

Muhammad-Abdullah012 · 2022-07-28T08:50:11Z

Muhammad-Abdullah012
Jul 28, 2022

When i run mint script to mint randomIpfs NFT, I get this error (only on testnet, not on localhost)

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", method="estimateGas", transaction={"from":"0xe8c8b1aE48eEa1FAF31C19445fE5ae898E0FFF38","to":"0x4f8E5B167160DFCD787681Db4F6345C3Cb9766Ad","value":{"type":"BigNumber","hex":"0x2386f26fc10000"},"data":"0xaa152491","accessList":null}, error={"name":"ProviderError","code":3,"_isProviderError":true,"data":"0xf0019fe60000000000000000000000000000000000000000000000000000000000001ed00000000000000000000000004f8e5b167160dfcd787681db4f6345c3cb9766ad"}, code=UNPREDICTABLE_GAS_LIMIT, version=providers/5.6.8)
    at Logger.makeError (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/logger/src.ts/index.ts:261:28)
    at Logger.throwError (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/logger/src.ts/index.ts:273:20)
    at checkError (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/providers/src.ts/json-rpc-provider.ts:78:20)
    at EthersProviderWrapper.<anonymous> (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/providers/src.ts/json-rpc-provider.ts:603:20)
    at step (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:48:23)
    at Object.throw (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:29:53)
    at rejected (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:21:65)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at DeploymentsManager.executeDeployScripts (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1223:19)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at DeploymentsManager.runDeploy (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1053:5)
    at SimpleTaskDefinition.action (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:409:5)
    at Environment._runTaskDefinition (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:219:14)
    at Environment.run (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:131:14)
    at SimpleTaskDefinition.action (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:555:32)
    at Environment._runTaskDefinition (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:219:14)
    at Environment.run (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:131:14)
    at SimpleTaskDefinition.action (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:640:5)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

mint.js file is:

const { ethers, network } = require("hardhat");
const {
    BASIC_NFT,
    RANDOM_IPFS_NFT,
    DYNAMIC_SVG_NFT,
    VRFCOORDINATORV2_MOCK,
    RANDOM_WORDS_REQUESTED,
} = require("../constants/constants");

module.exports = async ({ getNamedAccounts }) => {
    const { deployer } = await getNamedAccounts();
    const chainId = network.config.chainId;
    // const basicNft = await ethers.getContract(BASIC_NFT, deployer);
    const randomIpfs = await ethers.getContract(RANDOM_IPFS_NFT, deployer);
    // const dynamicSvgNft = await ethers.getContract(DYNAMIC_SVG_NFT, deployer);

    // const basicMintTx = await basicNft.mintNft();
    // await basicMintTx.wait(1);
    // console.log(`Basic NFT index 0 tokenURI: ${await basicNft.tokenURI(0)}`);

    const mintFee = (await randomIpfs.getMintFee()).toString();
    const randomIpfsTx = await randomIpfs.requestNft({ value: mintFee });
    const randomIpfsTxReceipt = await randomIpfsTx.wait(1);

    // const highValue = ethers.utils.parseEther("4000");
    // const dynamicSvgNftMintTx = await dynamicSvgNft.mintNft(highValue);
    // await dynamicSvgNftMintTx.wait(1);
    // console.log(
    //     `Dynamic SVG NFT index 0 tokenURI: ${await dynamicSvgNft.tokenURI(0)}`
    // );

    await new Promise(async (resolve) => {
        randomIpfs.once("NftMinted", async () => {
            console.log(
                `Random IPFS NFT index 0 tokenURI: ${await randomIpfs.tokenURI(
                    0
                )}`
            );
            resolve();
        });
        if (chainId == 31337) {
            const requestId =
                randomIpfsTxReceipt.events[1].args.requestId.toString();
            const vrfCoordinatorV2Mock = await ethers.getContract(
                VRFCOORDINATORV2_MOCK,
                deployer
            );

            vrfCoordinatorV2Mock.once(RANDOM_WORDS_REQUESTED, async () => {
                await vrfCoordinatorV2Mock.fulfillRandomWords(
                    requestId,
                    randomIpfs.address
                );
            });
        }
    });
};

module.exports.tags = ["all", "mint"];

When i add gasLimit to function call, like below,

const { ethers, network } = require("hardhat");
const {
    BASIC_NFT,
    RANDOM_IPFS_NFT,
    DYNAMIC_SVG_NFT,
    VRFCOORDINATORV2_MOCK,
    RANDOM_WORDS_REQUESTED,
} = require("../constants/constants");

module.exports = async ({ getNamedAccounts }) => {
    const { deployer } = await getNamedAccounts();
    const chainId = network.config.chainId;
    // const basicNft = await ethers.getContract(BASIC_NFT, deployer);
    const randomIpfs = await ethers.getContract(RANDOM_IPFS_NFT, deployer);
    // const dynamicSvgNft = await ethers.getContract(DYNAMIC_SVG_NFT, deployer);

    // const basicMintTx = await basicNft.mintNft();
    // await basicMintTx.wait(1);
    // console.log(`Basic NFT index 0 tokenURI: ${await basicNft.tokenURI(0)}`);

    const mintFee = (await randomIpfs.getMintFee()).toString();
    const randomIpfsTx = await randomIpfs.requestNft({ value: mintFee, gasLimit: "50000" }); // Adding gasLimit
    const randomIpfsTxReceipt = await randomIpfsTx.wait(1);

    // const highValue = ethers.utils.parseEther("4000");
    // const dynamicSvgNftMintTx = await dynamicSvgNft.mintNft(highValue);
    // await dynamicSvgNftMintTx.wait(1);
    // console.log(
    //     `Dynamic SVG NFT index 0 tokenURI: ${await dynamicSvgNft.tokenURI(0)}`
    // );

    await new Promise(async (resolve) => {
        randomIpfs.once("NftMinted", async () => {
            console.log(
                `Random IPFS NFT index 0 tokenURI: ${await randomIpfs.tokenURI(
                    0
                )}`
            );
            resolve();
        });
        if (chainId == 31337) {
            const requestId =
                randomIpfsTxReceipt.events[1].args.requestId.toString();
            const vrfCoordinatorV2Mock = await ethers.getContract(
                VRFCOORDINATORV2_MOCK,
                deployer
            );

            vrfCoordinatorV2Mock.once(RANDOM_WORDS_REQUESTED, async () => {
                await vrfCoordinatorV2Mock.fulfillRandomWords(
                    requestId,
                    randomIpfs.address
                );
            });
        }
    });
};

module.exports.tags = ["all", "mint"];

I get another error:

Error: ERROR processing /home/abdullah/hardhat-nft-fcc/deploy/04-mint.js:
Error: transaction failed [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ] (transactionHash="0xbb7dfc26487deb183aa05c1e6a8eaf6ebee86ec9500a77cdeb7f3d7018d52fbb", transaction={"hash":"0xbb7dfc26487deb183aa05c1e6a8eaf6ebee86ec9500a77cdeb7f3d7018d52fbb","type":2,"accessList":[],"blockHash":null,"blockNumber":null,"transactionIndex":null,"confirmations":0,"from":"0xe8c8b1aE48eEa1FAF31C19445fE5ae898E0FFF38","gasPrice":{"type":"BigNumber","hex":"0x9502f91b"},"maxPriorityFeePerGas":{"type":"BigNumber","hex":"0x9502f900"},"maxFeePerGas":{"type":"BigNumber","hex":"0x9502f91b"},"gasLimit":{"type":"BigNumber","hex":"0xc350"},"to":"0x4f8E5B167160DFCD787681Db4F6345C3Cb9766Ad","value":{"type":"BigNumber","hex":"0x2386f26fc10000"},"nonce":36,"data":"0xaa152491","r":"0x43fa87005294b377d86c109d08136cc3e218a51c45ed5644453791b178a0591a","s":"0x3a0c051498c77c8588a11735e58574894678704aa3f33e21a0dc734fde25db1b","v":1,"creates":null,"chainId":4}, receipt={"to":"0x4f8E5B167160DFCD787681Db4F6345C3Cb9766Ad","from":"0xe8c8b1aE48eEa1FAF31C19445fE5ae898E0FFF38","contractAddress":null,"transactionIndex":2,"gasUsed":{"type":"BigNumber","hex":"0x7d6a"},"logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","blockHash":"0x91faf1cb2c865ba9d5672591257ae3d2acb0b0488cb2592abfa92ffe6712bd57","transactionHash":"0xbb7dfc26487deb183aa05c1e6a8eaf6ebee86ec9500a77cdeb7f3d7018d52fbb","logs":[],"blockNumber":11102489,"confirmations":1,"cumulativeGasUsed":{"type":"BigNumber","hex":"0x26fa93"},"effectiveGasPrice":{"type":"BigNumber","hex":"0x9502f916"},"status":0,"type":2,"byzantium":true}, code=CALL_EXCEPTION, version=providers/5.6.8)
    at Logger.makeError (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/logger/src.ts/index.ts:261:28)
    at Logger.throwError (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/logger/src.ts/index.ts:273:20)
    at EthersProviderWrapper.<anonymous> (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/providers/src.ts/base-provider.ts:1541:24)
    at step (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/providers/lib/base-provider.js:48:23)
    at Object.next (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/providers/lib/base-provider.js:29:53)
    at fulfilled (/home/abdullah/hardhat-nft-fcc/node_modules/@ethersproject/providers/lib/base-provider.js:20:58)
    at DeploymentsManager.executeDeployScripts (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1223:19)
    at DeploymentsManager.runDeploy (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1053:5)
    at SimpleTaskDefinition.action (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:409:5)
    at Environment._runTaskDefinition (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:219:14)
    at Environment.run (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:131:14)
    at SimpleTaskDefinition.action (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:555:32)
    at Environment._runTaskDefinition (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:219:14)
    at Environment.run (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:131:14)
    at SimpleTaskDefinition.action (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat-deploy/src/index.ts:640:5)
    at Environment._runTaskDefinition (/home/abdullah/hardhat-nft-fcc/node_modules/hardhat/src/internal/core/runtime-environment.ts:219:14)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

And here is requestNft function in my randomIpfsNft.sol

function requestNft() public payable returns (uint256 requestId) {
        if (msg.value < i_mintFee) {
            revert RandomIpfsNft__NotEnoughETH();
        }

        // Will revert if subscription is not set and funded.
        requestId = i_vrfCoordinator.requestRandomWords(
            i_keyHash,
            i_subscriptionId,
            CONFIRMATIONS,
            i_callbackGasLimit,
            NUM_OF_WORDS_TO_REQUEST
        );
        s_requestToSender[requestId] = msg.sender;
        emit NftRequested(requestId, msg.sender);
    }

krakxn · 2022-07-28T09:21:16Z

krakxn
Jul 28, 2022

Make a repo, I will look into it

3 replies

Muhammad-Abdullah012 Jul 28, 2022
Author

Here is Github repo

Muhammad-Abdullah012 Jul 30, 2022
Author

@krakxn

krakxn Jul 30, 2022

Follow:

*In almost all cases, this will unfortunately require you specify an explicit gasLimit for your transaction, which will disable ether's automatic population of the gasLimit field, which will cause this error to go away.

To dial in an appropriate gas limit, try a value that is much higher than you expect, and then make a few transactions to discover reasonable values and then you can reduce this value down to that ballpark.

Keep in mind this error can also occur if the transaction would legitimately fail, in which case the root cause must be addressed, such as ensuring the correct Signer is being used, the appropriate allowance for an ERC-20 token has been approved, etc."

EDIT: Sorry for the delay, as there are a lot of notifications this was eventually lost.

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