Ethereum Accounts Explained: EOA vs Contract Account (CA)
Two account types on Ethereum: externally owned accounts (EOAs) with private keys, and contract accounts (CAs) run by code—plus how Account Abstraction aims to bridge their strengths.
What is a Honeypot Token? You Can Buy, But You Can Never Sell
A honeypot token looks like any normal token — until you try to sell. Learn how honeypots work, the common techniques scammers use, and how to detect them before you buy.
What is a Token Vesting (Lock-up) Contract?
A whitepaper promise means nothing. Learn how cliff + linear vesting works, why on-chain locking matters, and how to verify a project actually locked its tokens.
Ethereum Address Poisoning Attack Escalates: After One Transfer, He Received 89 Alert Emails
A user received over 89 address monitoring alerts after just two stablecoin transfers. Learn what address poisoning is, how it works, and how to protect yourself.
Solidity's Most Classic Exploit: Understanding Reentrancy Attacks
Call's flexibility comes with a trade-off — it is the entry point for the reentrancy attack. Learn how attackers drain contracts, why state order matters, and how ReentrancyGuard stops it.
Three Ways to Send Native Tokens in Solidity
In Solidity, there are three main ways to send native tokens (ETH): transfer, send, and call. Learn the differences in gas, safety, and best practices.
Batch Transfer Contract: Send to N Addresses in One Transaction
Airdrops, payroll, DAO rewards—batch transfer is a common Web3 need. Learn how the batch transfer contract works, its implementation, and fee structure.
Web3 Website Interaction: The Essence of Calling Smart Contract Methods
In Web3, many operations on websites are essentially calling smart contracts. Learn how claim, mint, and swap work — from RPC requests to wallet signatures to blockchain execution.
Web3 Resource Guide: News, Data, Wallets, Jobs and Dev Docs in One Place
Stop hunting for tools. A curated, category-organized list of Web3 resources — from news sources and on-chain analytics to job boards and smart contract development docs.
In Web3, Why Do You Need to Sign In After Connecting Your Wallet?
Connecting your wallet only shares your address — anyone can do that. Signing proves you own the private key. Here's why Web3 needs both steps.
Proxy Contract: The Most Hidden Rug Tool in DeFi
The contract address never changes — but everything inside it can. Learn how proxy contracts work, how they are used to silently replace token logic, and what to check before you buy.
What is Contract Source Code Verified? Why It Matters for Token Safety
If a token contract is not open source, you are facing a completely opaque black box — hidden mint functions, honeypot logic, backdoor transfers. Learn why verification is the first checkpoint before trading any token.
Permit and Permit2 Phishing: Why Gas-Free Signatures Are Riskier
Off-chain signatures don't cost gas, and many DApps ask you to sign to 'log in'—so users assume signing is safe. Learn how Permit and Permit2 phishing exploits this habit.
The Importance of Verifying Addresses Before Sending Crypto
Many people overlook checking address security before sending transactions. Learn why address verification is essential and what risks you're protecting against.
Web3 Security Essentials: Core Principles Every User Should Know
Learn the 5 core security principles for Web3: private key security, avoiding blind signatures, managing approvals, phishing prevention, and wallet layering.
Understanding Token Vesting: How Token Locking Works in Web3
Token vesting locks tokens in a smart contract until time or conditions are met. Learn about cliff, linear vesting, and why projects use it.
Understanding the Essence of Web3 Tokens: They Are Essentially Smart Contracts
Tokens are ledger records enforced by smart contracts. Issuing a token is easy; designing value is the real challenge.
Web3 Explainer | What is “Slippage” (Slippage)
Slippage refers to the difference between the “expected price” when you initiate a trade and the final actual execution price. In on-chain trading (especially on AMM-based DEXs), slippage is common and cannot be completely avoided.
What is a Web3 Wallet? Understanding Public Keys, Private Keys, and Mnemonics
A Web3 wallet is a digital asset management tool based on blockchain technology. Understanding public keys, private keys, and mnemonics is the first step into the Web3 world.
Understanding Token Approvals: What is an Unlimited Approval?
In the ERC20 standard, no one can directly transfer tokens from your wallet unless you have Approved them in advance. Learn the risks of unlimited approvals.