On November 6, 2023, a cross-chain fundraising platform called TrustPad lost approximately $155,000 to a smart contract exploit on the BNB Chain. The attack caused the platform’s TPAD token to lose 98% of its value in hours — dropping from $0.120 to $0.0016. If you are new to cryptocurrency and decentralized finance (DeFi), this incident might sound alarming. But understanding what happened and why is your best defense against becoming a victim yourself. Here is a straightforward guide to what went wrong and how to protect your assets.
The Basics
Smart contracts are self-executing programs that run on blockchains like Ethereum and BNB Chain. Think of them as vending machines: you put something in, and they automatically execute a predefined action. In TrustPad’s case, their staking contract was supposed to let users deposit tokens, earn rewards, and withdraw their funds after a lock period.
The problem was that TrustPad’s contract had a flaw in its programming. Specifically, a function called receiveUpPool() did not check who was calling it. Imagine a vending machine that gives free snacks to anyone who presses a certain button — no payment required. That is essentially what happened here. The attacker repeatedly called the flawed function to drain rewards they never earned.
Why It Matters
Smart contract exploits are one of the most common ways people lose money in crypto. In November 2023 alone, Web3 security incidents totaled approximately $349 million in losses according to Slowmist data. These are not theoretical risks — they happen every week, and everyday users are often the ones who suffer the most when token prices collapse.
When the TrustPad exploit happened, anyone holding TPAD tokens saw their investment lose 98% of its value. The attacker moved the stolen funds through Tornado Cash, a privacy tool that makes blockchain transactions untraceable. Once funds go through Tornado Cash, recovery is virtually impossible.
Getting Started Guide
Protecting yourself starts with understanding how to evaluate the safety of any DeFi protocol before you deposit your funds. Here are the essential steps every beginner should follow.
Step 1: Check for audits. Reputable DeFi projects commission security audits from established firms like CertiK, Trail of Bits, OpenZeppelin, or Consensys Diligence. These audits are publicly available documents that detail the security of a project’s smart contracts. If a project has no audit or refuses to share one, consider that a major red flag.
Step 2: Understand what you are approving. When you interact with a DeFi protocol, your wallet asks you to approve a transaction. Many users blindly click approve without reading what they are signing. Each approval grants specific permissions to a smart contract. Always check what tokens and how much you are granting access to.
Step 3: Use security tools. MetaMask recently integrated Blockaid security alerts that simulate transactions before you sign them, warning you about potential scams and malicious contracts. Enable these features in your wallet settings. They provide an extra layer of protection without requiring technical knowledge.
Common Pitfalls
The biggest mistake beginners make is FOMO — the fear of missing out. When a new protocol promises high yields or a token is trending on social media, the impulse to jump in immediately can be overwhelming. But rushing into unaudited or untested protocols is how most people lose their funds.
Another common pitfall is leaving unlimited token approvals active. When you approve a contract to spend your tokens, many protocols request unlimited approval by default. This means the contract can drain all of that token from your wallet at any time. Regularly review and revoke old approvals using free tools like Revoke.cash.
Finally, never invest more than you can afford to lose in any single DeFi protocol. Diversification is not just an investment strategy — it is a security measure. If one protocol gets exploited, you want your exposure limited to a small portion of your portfolio.
Next Steps
Start by reviewing your current wallet for any outstanding token approvals you no longer need. Set up MetaMask’s Blockaid security alerts if you have not already. Bookmark one or two reliable security resources — like the Slowmist Hacked Archive or Revoke.cash — and check them regularly. The crypto space rewards the informed and punishes the careless. By taking these basic precautions, you dramatically reduce your risk of falling victim to the next smart contract exploit.
Disclaimer: This article is for educational purposes only and does not constitute financial advice. Always conduct your own research before interacting with any DeFi protocol.
98% drop in hours on the tpad token. this is why i tell people to never put more than they can afford to lose on any single launchpad
The vending machine analogy is actually really helpful for beginners. More explainers should use stuff like this instead of jargon.
Finally a clear explanation. My grandson tried explaining smart contracts to me last week and I was completely lost until reading this.
agreed, the vending machine analogy actually works. my mom understood smart contracts for the first time after i sent her this
the vending machine analogy is good but real smart contracts are way messier. especially cross-chain ones like TrustPad was running on BNB
cross-chain on BNB is basically a recipe for exploits. the bridge contracts alone have been responsible for billions in losses
good beginner writeup but id add: always check if the contract has been audited AND by whom. some audit firms are basically rubber stamps
rustacean_ makes a key point about audit quality. some firms basically rubber stamp anything and take the fee. always check who audited it