DEV Community: Moiz Ali

Shield Every Transaction

Moiz Ali — Mon, 02 Feb 2026 08:16:48 +0000

Today i have found the new strategy of how can i write my own custom smart contracts to analyze the transactions more efficiently.
Back then i was analyzing using simple server-side logic and using regex to just read the bytecode of the smart contract user wants to analyze.

We were using etherscan api to fetch the bytecode and i make my regex logic to read it and detect any malicious pattern.

Example:

If the smart contract of any new coin is not verified on the etherscan site my simple server side logic simply returns ABI not found.
If the scammer made the smart-contract and added a malicious logic for instance For adding a user who interacts with scammer smart contract is added to blacklist and never withdraw token/coin/real money so my logic is simply detecting the names of the function scammer might have created.
So my regex logic is just looking at the names in the bytecode of smart contract "blacklist" and similar to that.
But what if **Scammer is using something like

UniCORN
** to dodge the audit of smart contracts.

so in that case my TxShield platform did not catch it, so i have been researching for the past 1 week and i have found a solution.

THE SOLUTION I FOUND:

Now to detect the fake names and ditching my naive REGEX logic, I write my own custom solidity smart contract to bypass this SCAM,
now in my smart contract logic I have brute-forcing the write/read bytes selectors of the BLACKLIST_METHODS which catches the most of the scams instantly, because it's no longer detecting the hard-coded names, it's detecting the pattern of bytes on which now scammer names whatever the function name when this function is executed in our TxShield's sandbox smart contract logic, it detects => is it storing any user address or not in some king of list/mapping.

The Teqnique:

This technique is called Phantom Contracts we are running our own custom smart contracts and not deploying we are just using our Infura to call the built-in method calleth with parameters and boom we have run our own smart contracts.

Benefits of phantom contracts:

You don't need to deploy your smart contract.
It's security driven no sharing of your source code.
You can your smart contract and directly use them inside your server-side code.

The Quesiton for you guys

Would you use this Phantom Contracts Techniques in your own code?

From Getting Rekt to Building a Shield: Why I'm Battling Smart Contract Scams

Moiz Ali — Wed, 08 Oct 2025 04:19:31 +0000

It only takes one bad transaction to lose it all. My friend learned that the hard way. This is the story of how his loss became the catalyst for TxShield.

👀 The Hook That Cost My Friend Everything
He signed a transaction for a "can't-miss" DeFi pool that promised to double his investment. The website looked professional, the Telegram group was buzzing. It seemed legit.

But it was a trap.

The smart contract he approved was designed for a single purpose: to take his funds and never let them out. His investment became permanently locked. The "double your money" promise was a lie, and the immutable nature of the blockchain, which he trusted, became his enemy.

That moment raised a question that wouldn't let me go...

💡 The Developer's Epiphany: "What If?"
What if, right before signing, he could have simulated that transaction and seen the red flags?

Not just a hunch, but a clear, data-driven warning showing the contract's malicious logic. That "what if" became my obsession. I stopped being just a developer watching from the sidelines and started building the solution I wished he'd had. I started building TxShield.

🛡️ So, What Exactly Is TxShield?
TxShield is a pre-transaction security scanner that acts as a final checkpoint before you sign. Think of it as a spell-check for your blockchain transactions. It doesn't just read the code; it executes a simulation in a sandboxed environment, analyzing the contract's intent across multiple critical vulnerabilities.

We've moved beyond simple token scans. TxShield performs deep, behavioral analysis.

🚨 The Sobering Reality: Why This Isn't Optional Anymore
The Web3 space is a battlefield. "Rug pulls" and "honeypots" aren't just memes; they are sophisticated, profitable business models for scammers. Relying on a project's website or a charismatic community admin is no longer sufficient.

True DYOR (Do Your Own Research) is impossible for the average user without tools that automate the technical analysis. TxShield bridges that gap, turning complex, hidden contract logic into simple, actionable security scores.

🧪 Under the Hood: The TxShield Security Engine
Here’s a glimpse into the specific threats we’re engineered to detect:

🧲 Honeypot Detection Suite (9 Advanced Checks): We don't just look for one type of trap. Our engine simulates for a range of them, including:

Fake Balance Check: Catches contracts that show you a balance you can never sell.

Hidden Owner Check: Detects secretly controlled ownership that can change rules at any moment.

Gas Trap Check: Identifies code that forces your transaction to fail with impossibly high gas.

Sell Tax Exploitation: Flags contracts with hidden, wallet-draining sell fees.

🎣 Phishing Protection Suite (5 Specialized Checks): This goes beyond fake websites, analyzing the contract approval itself:

Approve Scam Detection: Warns you about requests for unlimited token allowances.

Malicious Proxy Detection: Finds contracts that can be swapped out for a malicious version overnight.

🚀 What We Offer Builders and Users Today

Comprehensive EVM Coverage: Our engine works across all Ethereum Virtual Machine chains (Ethereum, BSC, Polygon, Arbitrum, etc.).
Clear, Actionable Results: We don't just give you data; we give you a clear "PASS/FAIL" on critical security parameters with plain-English explanations.
A Commitment to Evolving Security: Our roadmap is public and aggressive, featuring Ru g Pull Analysis, Wallet Risk Scoring, and AI Anomaly Detection.

🔮 The Mission Continues: What's Next?
This is just the beginning. We are actively developing support for Solana-based chains and building out our next 11 security features, including Front Running Protection and Cross-chain Bridge Assessment.
My mission is to bring to every corner of web3 where smart contract transaction are handled then weather it is a Exchanges, DAO's, Defi's, Wallets or any other place.

You guys can join TxShield and support this project.

My friend's story didn't have a happy ending, but my mission is to ensure that millions of others do.

I'd love to hear from you.

What's the worst smart contract exploit you've seen?
Do you want to contribute to (I'd love to explore partnership)?
Are you working on something similar? Let's collaborate to make Web3 safer.

Let's build a more secure future, Shield Every Transaction.

Web3 #Security #SmartContracts #DeFi #Blockchain #Solidity #RugPull #Honeypot #Developer #BuildInPublic #TxShield

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Moiz Ali — Wed, 08 Oct 2025 03:48:04 +0000