Transaction Simulation Spoofing Challenge
This page demonstrates how attackers exploit the time gap between transaction simulation and execution
For educational purposes only - exercise caution with real transactions
Scenario: The "Free NFT Claim" Trap
Imagine you receive a message claiming you're eligible for a limited edition "Early Supporter NFT." The website looks professional and claims you only need to pay a tiny fee of 0.00001 ETH plus gas to claim this NFT.
When you connect your wallet and click the "Claim" button, your wallet shows a transaction simulation indicating it's just a simple claim operation with a minimal fee. However, the contract contains malicious code that can steal your assets during execution.
How It Works
Transaction simulation is a feature in modern Web3 wallets that allows users to preview the result of a transaction before it's executed.
However, there's a time gap between simulation and actual execution, which malicious actors can exploit to deceive users.
Attackers can change contract states after simulation but before execution, causing the actual transaction result to be completely different from what was simulated.