Ethereum: Issue with tx.origin and msg.sender in Foundry test

Ethereum: Problem with Tx.origin 'A Msg.Senderin a founding test



As part of my ongoing research in smart contracts, I worked on the test case of the Ethernaut Level-4 (phone) contract using the foundry. However, I came across an unexpected problem that required some troubleshooting.

 problem:

During testing, I noticed that the fieldstx.origin ‘amsg.sender' in my contract were not said as expected. Specifically, these fields seemed to provide different values as I expected.



 problem: 

After reviewing the contractual code and understanding how it interacts with blockchain, I realized that there were two main problems:


However, this value is not always accurate when using Foundry test frame.

msg.sender
: pole msg.sendercontains an account address called the function of the contract (i.e. J. Beneficiary). This value may vary fromTx.origin ‘, especially if the transaction has been sent through another account.

Solution:

I used several adjustments to my test code to solve this problem:

Use Contractaddress as a midfielder : AKtx.origin 'andmsg.senderare still different, I can go back to the use of the contract address ( contradadress) as an alternative.



Here is an updated code fragrant that demonstrates the following changes:

Javascript

Const {etters} = require (‘ethers’);

// test case for telephone contract

Async function TESTTELEPHONE () {)

// initialize the contract and account

CONST REPLACETRACT = New Ethers.Contract (

“

BetterContract abi,

Ethers.wallet.Fromprivatekey (

“Your_private_Key”, // replace your private key

)

);

// Create a transaction object

Const tx = {

by: Etshers.wallet.Fromprivatekey (“Your_private_Key”),

To: TelePhonContract.address, // Correct address for this contract

Value: etters.utiles.parsseeter (“1”), // Set the transaction value

Gasprice: 20N, // Set the gas price (optional)

GASLIMIT: 2000, // Set the maximum gas limit

Data: “0x”, // Set transactions data (in this case blank)

};

// make a transaction

Const Result = AWAIT NUMBONECONTRACT.SEDTRACTRESACTION (TX);

Console.log (result);

}

// run the test function

testtelephone ();

Conclusion:

By applying these modifications, I managed to solve the problem with Tx.origin 'and“ msg.sender in my test case for a telephone contract. Now that the values are accurate, I can continue to test and analyze further.

If you face similar problems or have any questions about this solution, please do not hesitate to ask!

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