This lesson teaches you how to not lose money in ways most beginners don’t even see coming

PART 1: The Real Threat Model

Reality:

In DeFi, threats come from:

• Malicious contracts

• Fake websites

• Social engineering

• User mistakes

Key Insight:

PART 2: Honeypot Detection

What is a Honeypot?

A token you can buy… but cannot sell

How it works:

• Contract blocks selling

• Or applies extreme taxes

Red Flags:

• You can buy, but selling fails

• Extremely high “tax” (e.g. 99%)

• No real liquidity exit

Operator Rule:

Always test with small amount before going big

PART 3: Avoiding Honeypot Tokens

Before buying any token:

• Check liquidity

• Check trading activity

• Check contract behavior

Key Insight:

PART 4: Scam Transaction Detection

Dangerous scenario:

You connect wallet → click “Approve”

👉 You might be giving full access to your funds

Red Flags:

• “Unlimited approval”

• Unknown contract interaction

• Suspicious transaction details

Operator Rule:

Never sign what you don’t understand

PART 5: Phishing & Fake Sites

Common attack:

Fake website that looks like:

• Uniswap

• MetaMask

Goal:

👉 Trick you into connecting wallet 

👉 Steal funds via approvals

Red Flags:

• Slightly different URL

• Urgency (“act now”)

• Links from random messages

Operator Rule:

Always access sites from bookmarks—not links

PART 6: Fake Tokens & Contract Risks

Problem:

Anyone can create a token

Result:

• Fake versions of real tokens

• Identical names, different contracts

Example:

“USDC” (fake) vs real USDC

Operator Rule:

Always verify contract address—not just name

PART 7: Signing Transactions Safely

What signing means:

You approve an action on-chain

Danger:

Signing = permission

Never blindly sign:

❌ “SetApprovalForAll”

❌ Unlimited token access

❌ Unknown contract interactions

Key Insight:

PART 8: Revoke Permissions

Why it matters:

Even after using a protocol:

👉 It may still have access to your tokens

Tool:

• Revoke.cash

Best Practice:

• Regularly review approvals

• Remove unused permissions

Key Insight:

PART 9: Common Wallet Mistakes

❌ Sending to wrong address

❌ Using wrong network

❌ Not leaving gas

❌ Copy-paste errors

Reality:

Blockchain transactions are irreversible

Operator Rule:

Always double-check before confirming

PART 10: The “Too Good to Be True” Rule

If you see:

• Insane APY

• Guaranteed returns

• “Limited time opportunity”

Reality:

It’s probably a trap

PART 11: Security Mindset

Professionals think:

• What can go wrong?

• What permissions am I giving?

• What if this is malicious?

Key Insight:

Putting It All Together

Before every action:

• Is this contract verified?

• Do I understand this transaction?

• Am I using the right wallet?

• What’s the worst-case scenario?

Final Question:

If this is a scam… how much do I lose?

Practice Mission

Visit a DEX

Simulate a transaction

Carefully read:

• Approvals

• Contract interaction

Challenge:

Check your wallet on Revoke.cash 

👉 Remove unused approvals

Final Thought

In DeFi, you don’t lose money slowly… you lose it instantly—if you’re careless