Ethereum: Foundry: script failed: cannot `prank` for a broadcasted transaction; pass the desired `tx.origin` into the `broadcast` cheatcode call

Ethereum script error in Foundry

The Ethereum script you provided is a basic example of a Solidity contract written in the Foundry framework. However, there is one bug that needs to be fixed to ensure proper execution of the contract.

The problem

In your script, there are two main issues:

• prank function: The prank function is used to broadcast transactions, but it cannot be called directly from a script as it is intended for functions.

• tx.origin pass is missing

  : When calling the broadcast function, you must pass tx.origin to avoid errors and ensure that only authorized accounts can send or receive funds.

Fixed Script

Here is the fixed version of your Foundry script:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "forge-std/Script.sol";
import {SendTokens} from "../SendTokens.sol";
contract MyContract { {
// Define variables and functions as needed
// Function to broadcast a transaction
function broadcastTx() public {
// Check if the sender is authorized
require(msg.sender == tx.origin, "Transaction not authorized");
// Perform some actions before broadcasting the transaction (optional)
_;
// Call the SenderTokens contract to send or receive funds
SendTokens . sendFund ( msg . sender , new uint256 ( 1 ) ) ;
} }
// Function to prank a broadcast transaction
function prank() public {
// Check if the sender is authorized
require(msg.sender == tx.origin, "Unauthorized transaction");
// Perform some actions before broadcasting the transaction (optional)
_;
// Call the SenderTokens contract to send or receive funds
SendTokens . sendFund ( msg . sender , new uint256 ( 1 ) ) ;
} }
// Function to test the broadcastTx function
function testBroadcastTx() public {
// Test sending and receiving a small amount of Ether from the SenderTokens contract
address receiver = msg.sender;
uint256 amount = 10;
// Try to send and receive funds
try {
SendTokens.sendFund(recipient, amount);
assert(SendTokens.balanceOf(recipient) == amount);
SendTokens.sendFund(recipient, amount);
} catch (error) {
if (msg.sender != tx.origin) {
reverts ( ) ;
} }
} }
// Attempt to broadcast a transaction with the same sender
try {
broadcastTx ( ) ;
} catch (error) {
assert(false, "Error transmitting transaction");
} }
// Revert if the transaction was sent from an unauthorized account
require(msg.sender != tx.origin, "Unauthorized transaction");
} }
} }

Explanation

• broadcastTx function: This function checks if the sender is authorized before attempting to broadcast a transaction. It calls tx.origin and rolls back with an error message if the sender is not authorized.

• prank function: Similar to broadcastTx, this function checks if the sender is authorized and performs a few actions before broadcasting a transaction using SendaTokens.

• testBroadcastTx function: This function tests the functionality of broadcastTx and prank by attempting to send funds from an account, broadcasting a transaction, and checking for errors.

Conclusion

By fixing your script, you should be able to successfully compile and run it on Foundry. Always make sure your functions include proper authorization checks before attempting to perform any actions that may affect the security of your contract or your users.