Smart Contracts

EIP-712 Domain Separation: Pattern, When to Use It, and Common Implementation Bugs (Complete Guide) EIP-712 Domain Separation matters because typed-data signatures are only as safe as the context they are bound to. If a signature can be replayed against the wrong contract, the wrong chain, the wrong version, or a deployment you never meant to […]

Solana Programs vs EVM Contracts: Security Differences Builders Must Know (Complete Guide) Solana Programs vs EVM Contracts is one of the most important security comparisons a builder can make before shipping production code, because the two environments do not just use different languages or tooling. They expose different execution models, account structures, trust boundaries, failure

Circuit Breakers: Pattern, When to Use It, and Common Implementation Bugs (Complete Guide) Circuit Breakers are one of the most important defensive patterns in smart contract security because they let a protocol slow down, pause, or contain damage when something goes wrong. In practice, the pattern is simple. A contract or a group of contracts

Permit2 and Allowances: Security Deep Dive with Examples (Complete Guide) Permit2 and Allowances are central to modern token UX, but they are also one of the easiest places for silent risk to accumulate. A wallet can look clean, a dApp can feel polished, and a single signature can still create standing token permissions that outlive

Pull Payments: Pattern, When to Use It, and Common Implementation Bugs (Complete Guide) Pull Payments is one of the most practical smart contract security patterns because it changes who initiates value transfer and when that transfer happens. Instead of pushing funds to a recipient during some larger business flow, the contract records what is owed

Testing Smart Contracts: Unit Tests, Fuzzing, and Invariants Explained Testing Smart Contracts is not about chasing 100 percent coverage. It is about proving that the things users rely on never break, even when inputs get weird, transactions get reordered, and attackers intentionally look for edge cases. This guide walks through unit tests, fuzzing, and invariants

Commit-Reveal Schemes: Pattern, When to Use It, and Common Implementation Bugs (Complete Guide) Commit-Reveal Schemes are one of the cleanest ways to reduce front running, limit manipulation, and make on-chain choices fairer when users must submit secrets. But the pattern is easy to implement badly. This guide explains when commit-reveal is the right tool, how

Solidity Security Basics: Reentrancy, Access Control, and Common Bugs (Complete Guide) Solidity Security Basics is the difference between shipping code that survives adversarial users and shipping code that survives only friendly testing. The blockchain is a hostile environment by default: every external call is a potential trap, every permission is a potential backdoor, and every

How Upgradeable Smart Contracts Work (Complete Guide) How Upgradeable Smart Contracts Work is the difference between shipping features safely and shipping a hidden admin backdoor by accident. Upgradeability is not magic. It is a set of very specific low level mechanics (mostly delegatecall and storage rules) wrapped in patterns like Transparent proxies and UUPS. In

Pausable Patterns in Smart Contracts: Security Deep Dive with Examples (Complete Guide) Pausable patterns in smart contracts are not a “panic button” you add at the end. They are a deliberate decision about how your protocol behaves when reality stops matching assumptions. A good pause design limits damage, preserves user escape routes, and buys time