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Foundations

Core blockchain and crypto concepts: wallets, keys, consensus, and the building blocks of Web3.

What Are Staking Rewards?Staking rewards look like interest at first glance, but they come from a very different mechanism

What Are Staking Rewards?Staking rewards look like interest at first glance, but they come from a very different mechanism. They are payments for helping a proof-of-stake network stay live, agree on history, and punish bad behavior — which is why the return always comes bundled with rules, lockups, and risk.Mar 21, 202624 min read

What is an Airdrop?Airdrops look simple: give tokens away and users arrive

What is an Airdrop?Airdrops look simple: give tokens away and users arrive. In practice, they are a distribution mechanism with hard design tradeoffs around cost, eligibility, incentives, and security — and the details of the token standard and chain matter more than most people expect.Mar 21, 202625 min read

What is ERC-1155?ERC-1155 matters because it changes the unit of token design

What is ERC-1155?ERC-1155 matters because it changes the unit of token design. Instead of deploying one contract per asset class, it lets a single contract manage many token IDs at once — fungible, non-fungible, and in-between — which makes batch transfers, shared logic, and game-style asset systems much cheaper and cleaner.Mar 21, 202623 min read

What Is Liquid Staking?Liquid staking solves a simple but important problem: in proof-of-stake systems, earning staking rewards usually means locking up capital

What Is Liquid Staking?Liquid staking solves a simple but important problem: in proof-of-stake systems, earning staking rewards usually means locking up capital. By issuing a tradable token that represents the staked position, liquid staking turns an illiquid protocol claim into something you can hold, trade, or use elsewhere — while introducing new layers of market, smart contract, and centralization risk.Mar 21, 202623 min read

What Is Staking?Staking looks simple — lock tokens, earn rewards — but its real purpose is to make honest behavior cheaper than attacking the chain

What Is Staking?Staking looks simple — lock tokens, earn rewards — but its real purpose is to make honest behavior cheaper than attacking the chain. Once you see staking as a way to turn capital into security, the mechanics of validators, delegation, unbonding, rewards, and slashing start to fit together.Mar 21, 202626 min read

What Is 2FA (Two-Factor Authentication)?Two-factor authentication matters because passwords fail in a predictable way: they can be guessed, reused, stolen, or phished

What Is 2FA (Two-Factor Authentication)?Two-factor authentication matters because passwords fail in a predictable way: they can be guessed, reused, stolen, or phished. 2FA changes the attack from “know one secret” to “break two different mechanisms,” which is why it helps so much — and why some forms of 2FA are much stronger than others.Mar 21, 202623 min read

What is Smart Contract Risk?Smart contract risk is what happens when software directly controls assets, permissions, and financial logic on a blockchain

What is Smart Contract Risk?Smart contract risk is what happens when software directly controls assets, permissions, and financial logic on a blockchain. The unusual part is not just that bugs exist, but that the bug can become the public, irreversible behavior of the system once the contract is deployed.Mar 21, 202626 min read

What Is Social Engineering?Social engineering is not mainly about malware or broken cryptography

What Is Social Engineering?Social engineering is not mainly about malware or broken cryptography. It is about getting a human to do the attacker’s work: reveal information, grant trust, or approve an action that a system would otherwise block.Mar 21, 202625 min read

What is Transaction Simulation?Transaction simulation matters because blockchain transactions are hard to undo, but what you sign is often more opaque than it looks

What is Transaction Simulation?Transaction simulation matters because blockchain transactions are hard to undo, but what you sign is often more opaque than it looks. By executing a transaction off-chain first, wallets and developers can preview asset movements, internal calls, and failures before committing real funds.Mar 21, 202626 min read

What is a Re-Entrancy Attack?A re-entrancy attack happens when a contract gives control to an external contract before finishing its own bookkeeping

What is a Re-Entrancy Attack?A re-entrancy attack happens when a contract gives control to an external contract before finishing its own bookkeeping. That small ordering mistake can let an attacker come back in through the same door repeatedly and withdraw, mint, or manipulate state as if the first action never happened.Mar 21, 202625 min read

What is a Replay Attack?A replay attack works not by breaking a signature, but by reusing a valid one in a context where it still counts

What is a Replay Attack?A replay attack works not by breaking a signature, but by reusing a valid one in a context where it still counts. That simple idea explains why modern systems add nonces, timestamps, session binding, genesis hashes, and chain IDs: they are ways of making “valid once” stop meaning “valid forever, everywhere.”Mar 21, 202626 min read

$What Is a Rug Pull?A rug pull is not just \"a crypto scam$

What Is a Rug Pull?A rug pull is not just \"a crypto scam.\" It is a failure of control: someone retains the power to change rules, drain liquidity, mint supply, or exploit approvals after users have trusted the system. Understanding rug pulls means understanding where that power lives, how it is hidden, and what controls actually limit it.Mar 21, 202623 min read