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Glossary

Non-Fungible Token (NFT)

An NFT (non-fungible token) is a unique digital asset that represents ownership of a specific item, piece of content, or access right on a blockchain. Unlike cryptocurrencies such as ETH or BTC, which are fungible and interchangeable, each NFT is distinct and cannot be replicated or divided. NFTs are typically

Non-Custodial Wallet

A non-custodial wallet is a cryptocurrency wallet that gives users full control over their private keys and funds, without relying on a third party for custody. These wallets are a core component of self-sovereign finance and Web3, allowing individuals to store, send, and receive digital assets without needing permission or

Node

A node is any device that participates in a blockchain network by maintaining a copy of the ledger, validating transactions, and potentially contributing to consensus. Nodes form the backbone of decentralized networks, ensuring transparency, redundancy, and resistance to tampering or single points of failure. There are different types of nodes

NFT Collection

An NFT collection is a curated group of individual non-fungible tokens (NFTs) that are related by theme, design, creator, or smart contract. Each token in a collection is unique, but all share a common identity or purpose — such as digital art series, profile picture (PFP) projects, in-game assets, or utility-based

Order Book

An order book is a real-time, constantly updated list of buy and sell orders for a specific asset on a trading platform. It displays the prices and quantities that traders are willing to accept, forming the foundation of price discovery on centralized exchanges (CEXs) and some decentralized exchanges (DEXs). The

On-Chain Data

On-chain data refers to all information that is recorded directly on a blockchain network. This includes transactions, token transfers, smart contract interactions, wallet balances, NFT ownership, staking activity, and more. Because blockchains are transparent and immutable, on-chain data is permanently stored and publicly accessible, making it a foundational layer for

Optimistic Rollup

An optimistic rollup is a Layer 2 scaling solution that bundles multiple off-chain transactions into a single batch and posts them to a Layer 1 blockchain like Ethereum. It assumes all transactions are valid by default and only verifies them if someone challenges the result within a specified time — known