Metamask: Metamask shows an error but works from the console

Metamask Error: Contract Code Not Validated

As a developer working with smart contracts on the Ethereum blockchain, you have probably encountered issues when deploying and interacting with contracts. One of the most frustrating experiences is when your contract code is not validating properly in both the web development environment (web3.js) and the Metamask wallet mobile app.

In this article, we will examine the issue you are facing and provide a step-by-step guide on how to resolve it using the console output from Metamask.

Problem: Contract Code Error in Metamask Console

When you try to call your contract and deposit money to yourself in the MetaMask console environment, an error appears indicating contract code validation issues. This is not typical behavior for most contracts, as they are expected to validate their code properly.

To troubleshoot this issue, let’s look at the web3.utils.toWei() function and what might be causing the issue:

let ethAmount = this.web3.utils.toWei(...); // error: invalid argument type

In your case, it looks like you are trying to convert an Ethereum amount from wei (a unit of ether) to a standard decimal representation. However, there is a problem with the second argument passed to `toWei()''.

function depositAmount(etherAmount: uint256) public {
//...
}

• Invalid or Missing Arguments: Make sure you include all required arguments when calling `depositAmount()”. Make sure the second argument (etherAmount) is of the expected type.

• Type Inference Errors

  : The Ethereum function “toWei()” requires specific argument types. If your contract is written in Solidity, make sure that it uses the correct types:

function depositAmount(ethereumAmount: uint256) public {
//...
}

Workarounds

To resolve this issue, you can try one or more of the following workarounds:

• Add type annotations: If your contract is written in Solidity (e.g. .sol), add type annotations to the “etherAmount” argument:

function depositAmount(ethereumAmount: uint256) public {
//...
}

• Use a more robust contract validation library: Consider using libraries like OpenZeppelin “contract validation” or “eip172” to validate your contract code and avoid type errors.

Conclusion

To resolve the issue of contract code validation errors in Metamask, make sure your contract is written with proper function signatures, includes all required arguments, and uses expected types. If you still encounter problems while trying these solutions, please provide more context or code snippets related to your project and I will do my best to help you.

Example use case

Here is an updated example of how you can use web3.utils.toWei() with type annotations:

pragma robustness ^0,8,0;
contract DepositAmount {
function depositAmount(ethereumAmount: uint256) public {
request(ethereumAmount != 0, "Invalid amount");
//...
}
}

Please note that this is just a basic example and may not cover all extreme cases. Be sure to thoroughly test your contract both in the web development environment (web3.js) and in the Metamask wallet mobile app.