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Foundations

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

What is Self-Custody?Self-custody is the promise and burden at the center of crypto: you control the keys, so no bank or exchange can freeze, reverse, or recover your assets for you

What is Self-Custody?Self-custody is the promise and burden at the center of crypto: you control the keys, so no bank or exchange can freeze, reverse, or recover your assets for you. That sounds simple, but the real idea is about who has signing authority, how wallets turn secrets into usable accounts, and where that control can still fail.Mar 22, 202624 min read

What is a Payment Stablecoin?A payment stablecoin tries to make blockchain money behave like cash: easy to transfer, easy to price, and redeemable at a fixed value

What is a Payment Stablecoin?A payment stablecoin tries to make blockchain money behave like cash: easy to transfer, easy to price, and redeemable at a fixed value. That sounds simple, but the hard part is not moving the token on-chain — it is preserving confidence that one token really is worth one unit of fiat when many holders want out at once.Mar 22, 202621 min read

What Is ERC-3643?ERC-3643 matters because it changes a basic assumption of crypto tokens: not every wallet is allowed to hold or receive them

What Is ERC-3643?ERC-3643 matters because it changes a basic assumption of crypto tokens: not every wallet is allowed to hold or receive them. It keeps ERC-20 compatibility, but wraps transfers in identity and compliance checks so regulated assets can move on public blockchains without becoming fully permissionless.Mar 22, 202621 min read

What is a Utility Token?Utility tokens are supposed to be simple: a token you use to access a product, service, or network function

What is a Utility Token?Utility tokens are supposed to be simple: a token you use to access a product, service, or network function. In practice, that idea becomes slippery as soon as the token is tradable, marketed for appreciation, or tied to a platform that is not yet fully built.Mar 21, 202625 min read

What Are NFTs?NFTs matter because they let blockchains represent *specific* digital items rather than interchangeable balances

What Are NFTs?NFTs matter because they let blockchains represent *specific* digital items rather than interchangeable balances. The hard part is not the picture or the buzzword, but the ownership model: how a network names a unique asset, transfers it safely, and gives wallets and marketplaces a common way to understand it.Mar 21, 202622 min read

What is a Sequencer?A sequencer is the part of a rollup or high-throughput chain that decides transaction order before the base layer settles the result

What is a Sequencer?A sequencer is the part of a rollup or high-throughput chain that decides transaction order before the base layer settles the result. That sounds simple, but this ordering role is where latency, censorship risk, MEV, cross-chain composability, and much of a system’s practical trust model actually live.Mar 21, 202624 min read

What Is a Price Oracle?A price oracle is the bridge between blockchains and markets outside the chain

What Is a Price Oracle?A price oracle is the bridge between blockchains and markets outside the chain. It sounds simple—“what is the price?”—but answering that question safely is hard, because smart contracts need a number they can trust enough to lend against, liquidate on, or settle trades from.Mar 21, 202624 min read

What Is Snapshot Voting?Snapshot voting became popular because on-chain governance is expensive at exactly the moment communities want broad participation

What Is Snapshot Voting?Snapshot voting became popular because on-chain governance is expensive at exactly the moment communities want broad participation. It solves that by keeping voting power anchored to blockchain state while moving proposals and votes off-chain into signed, verifiable messages.Mar 21, 202626 min read

What Is Keccak-256?Keccak-256 matters because the name hides two different realities: a broad sponge-based hash family and a specific 256-bit variant used by systems like Ethereum

What Is Keccak-256?Keccak-256 matters because the name hides two different realities: a broad sponge-based hash family and a specific 256-bit variant used by systems like Ethereum. Once you see how the sponge construction trades speed for security through the rate and capacity, the design becomes much less mysterious.Mar 21, 202621 min read

#HASH FUNCTIONS

What is Solana Accounts?Solana accounts are the basic containers that hold everything the chain knows: SOL balances, token balances, program code, and application state

What is Solana Accounts?Solana accounts are the basic containers that hold everything the chain knows: SOL balances, token balances, program code, and application state. If Ethereum makes you think in contracts and storage, Solana asks you to think in addresses that point to structured state objects with strict ownership rules.Mar 21, 202622 min read

What is a Crypto Wallet?A crypto wallet does not really “hold coins” in the way a leather wallet holds cash

What is a Crypto Wallet?A crypto wallet does not really “hold coins” in the way a leather wallet holds cash. It is better understood as a key manager and signing tool: the software or device that proves control over blockchain accounts, authorizes transactions, and increasingly acts as your login for onchain apps.Mar 21, 202624 min read

What is Social Recovery?Social recovery tries to solve the oldest wallet problem: a single lost secret should not mean permanently lost assets

What is Social Recovery?Social recovery tries to solve the oldest wallet problem: a single lost secret should not mean permanently lost assets. Instead of putting all risk on one seed phrase, it spreads recovery power across guardians, devices, or other verifiers — which improves usability, but only if the recovery path itself is designed with extreme care.Mar 21, 202625 min read