CODEWITHSUNDEEP
soliditysmartcontractsremix
marvin
marvin

Reputation: 45

Problem when deploying contract using Remix on Testnet

I tried to deploy a contract to Testnet with Remix (all Testnet return the same message) and I got this error:

Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending?
Internal JSON-RPC error. { "code": -32000, "message": "gas required exceeds allowance (30000000) or always failing transaction" }

But when I tried to deploy it in BSC Mainnet everything works fine with no errors. Any suggestions?

this is the relevant code

contract artemis is Context, IERC20, Ownable {
    // ...

    constructor() public {
        _rOwned[_msgSender()] = _rTotal;

        IUniswapV2Router02 _uniswapV2Router =
            IUniswapV2Router02(0x05fF2B0DB69458A0750badebc4f9e13aDd608C7F);
        // Create a Pancakeswap pair for this new token
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());

        // set the rest of the contract variables
        uniswapV2Router = _uniswapV2Router;

        //exclude owner and this contract from fee
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    // ...
}

I upload the whole code here because its to long.

code

Upvotes: 3

Views: 4050

Answers (1)

Petr Hejda
Petr Hejda

Reputation: 43491

IUniswapV2Router02 _uniswapV2Router =
    IUniswapV2Router02(0x05fF2B0DB69458A0750badebc4f9e13aDd608C7F);

// Create a Pancakeswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
    .createPair(address(this), _uniswapV2Router.WETH());

These lines in your constructor are trying to interact with a contract that exists on the mainnet. But you're on the testnet, where there's no contract on this address.

As stated in this post, the Pancake testnet router address is :

0xD99D1c33F9fC3444f8101754aBC46c52416550D1

So you need to replace the hardcoded address to this one.

Upvotes: 7

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