An attack where a single entity controls over half of a blockchain’s mining power or stake to manipulate transactions.

A decentralized lending protocol where users deposit crypto to earn interest and borrow against collateral.

System for restricting who can call specific smart contract functions based on permissions.

A system that allows smart contracts to function as user accounts instead of relying only on externally owned accounts.

The risk that if admin keys are compromised, attackers can exploit smart contract functions to steal funds or break protocol.

Free distribution of tokens to addresses, rewarding early users or generating adoption.

A pre-approved list of addresses eligible to participate in NFT minting before public sale.

Any cryptocurrency other than Bitcoin, including Ethereum, Solana, and tokens.

Anti-Money Laundering and Counter-Financing of terrorism regulations to prevent illicit fund flows and terrorist financing.

ABI stands for Application Binary Interface. It defines how to interact with smart contracts and is usually represented in JSON.

Annual Percentage Rate (APR) is the yearly interest rate without accounting for compounding effects.

Annual Percentage Yield is the yearly return on investment including compounding effects.

Buying an asset at a lower price on one venue and selling at higher price on another to profit from differences.

An Ethereum Layer 2 using Optimistic Rollups with faster fraud proof verification than alternatives.

Smart contract protocol using mathematical formulas and liquidity pools to enable trading without order books.

An NFT that represents a user's digital identity or profile picture in Web3 communities.

A server that submits transactions on behalf of users, enabling gasless or subsidized transactions.

Mass withdrawal of funds from a protocol or exchange as users lose confidence in solvency.

A sustained period when prices fall and market sentiment is pessimistic.

The identification of the actual person or entity that ultimately owns or controls an account or legal structure.

A container of transactions cryptographically linked to previous blocks forming the blockchain.

A web tool that displays blockchain data including transactions, addresses, and blocks in readable format.

The sequential number assigned to each block, starting from zero for the genesis block.

The average interval between the creation of consecutive blocks in a blockchain.

A distributed ledger recording transactions immutably across a network of computers with no central authority.

A video game where in-game assets are NFTs owned on-chain, enabling player trading and ownership.

The idea that a blockchain cannot easily maximize decentralization, security, and scalability at the same time.

Borrowing in DeFi means taking a crypto loan from a protocol, usually by locking up other assets as collateral.

A protocol that enables the transfer of assets and data between different blockchains.

A browser wallet is a wallet that runs inside a web browser, usually as an extension, and lets users sign transactions and connect to dApps.

A reward program that pays security researchers for responsibly finding and reporting vulnerabilities.

A sustained period when cryptocurrency prices rise and market sentiment is optimistic.

A bundler is a service in account abstraction systems that collects user operations and packages them into blockchain transactions.

The low-level machine code that smart contracts compile to before deployment.

Commodity Futures Trading Commission is a US regulator overseeing futures, derivatives, and commodity markets.

The current number of cryptocurrency tokens actively in circulation and held by users.

Client-side signing means a transaction or message is signed on the user's device instead of on a remote server.

Keeping cryptocurrency private keys offline and disconnected from the internet to maximize security.

A cold wallet is a wallet that keeps private keys offline, making it harder for internet-based attackers to reach them.

Assets deposited into a lending protocol as security for borrowed funds, held until the loan is repaid.

Collateral ratio is the relationship between the value of collateral posted and the amount borrowed against it.

A group of related NFTs created by the same contract, typically sharing a theme or aesthetic.

A cryptographic method to commit to a value while hiding it, later revealing the value as proven.

A commodity is an asset class that regulators often compare with certain crypto assets when deciding how they should be treated under the law.

The group of users, developers, and supporters contributing to and promoting a blockchain project.

Compliance means following the laws, rules, and internal controls that apply to a crypto business, protocol, or service.

Composability is the ability of blockchain apps and smart contracts to work together like building blocks.

A lending protocol pioneering autonomous interest rate setting through supply and demand mechanics.

Protocol and algorithms enabling distributed network participants to agree on the correct blockchain state.

A special function that runs once when a contract is deployed, used to initialize state variables.

Consumer protection refers to the rules and safeguards meant to reduce unfair, deceptive, or harmful practices against users.

A contract call is an interaction where one account or contract invokes a function on a smart contract.

The process of publishing smart contract bytecode to the blockchain, creating a permanent on-chain contract instance.

A contributor is someone who helps a project, such as a developer, designer, marketer, or community member.

The main developers and leaders building and maintaining a blockchain protocol or project.

A crafting asset is an in-game item or resource used to create, upgrade, or combine other game assets.

The ability for blockchains to communicate with and transfer assets between each other.

A crypto market cycle is the repeating pattern of expansion, speculation, decline, and recovery seen across crypto markets over time.

A digital application or device that manages cryptocurrency private keys and enables users to store, send, and receive digital assets.

Digital money secured by cryptography that operates on decentralized networks without requiring a central bank or government.

Tax obligations on cryptocurrency transactions and holdings, varying significantly by jurisdiction.

A specialized DEX optimized for stablecoin and correlated asset swaps with low slippage.

A cryptocurrency wallet where a third-party service provider holds and manages your private keys on your behalf.

The arrangement of who holds and controls the private keys to cryptocurrency, determining who has actual ownership and access to funds.

A Decentralized Autonomous Organization (DAO) is a blockchain-based organization governed by smart contracts and token-holder voting.

A decentralized application that runs on a blockchain network and is controlled by code rather than a central company.

The distribution of power and control across a network rather than concentrating it in a single authority or entity.

A decentralized exchange (DEX) is a peer-to-peer platform for trading cryptocurrencies using smart contracts without intermediaries.

Decentralized Finance (DeFi) is financial services like lending, borrowing, and trading built on blockchains without traditional intermediaries.

A cryptocurrency designed to reduce its supply over time, usually through token burning.

To assign your voting power or governance rights to another person or address, allowing them to vote on your behalf.

A low-level Solidity function that executes code from another contract while preserving the calling contract's context.

A measure of how hard it is to mine a block in a proof-of-work blockchain.

NFT-based virtual real estate in metaverses and games representing ownership of digital parcels.

Cryptographic proof that you authorized a transaction, created with your private key and verified with your public key.

The reduction in ownership percentage when new tokens are created and added to supply.

An attack where someone attempts to spend the same cryptocurrency twice.

An NFT whose properties or appearance can change based on data, time, or user actions.

Do Your Own Research is a practice of independently evaluating crypto projects before investing.

The predetermined plan and mechanism for how new tokens are created and released into circulation.

A measure of randomness or unpredictability, critical for cryptographic key generation and security.

A fixed period of time or number of blocks during which certain network functions or validator duties occur.

An Ethereum standard for creating both fungible and non-fungible tokens in a single smart contract.

A standard for upgradeable smart contracts using proxy patterns and transparent storage slots.

The standard for fungible tokens on Ethereum, defining how token contracts implement transfer and approval functions.

An Ethereum standard that enables NFT creators to automatically receive royalties on secondary sales.

A standard for tokenized yield-bearing vaults, enabling standardized interaction with yield-generating DeFi protocols.

The Ethereum standard for creating and managing unique NFTs.

An advanced token standard improving on ERC-20 with operator concepts and better transfer hooks.

The Ethereum Virtual Machine (EVM) is the computation engine that executes smart contract bytecode on Ethereum and EVM-compatible chains.

A logging mechanism that records important contract actions on the blockchain for external monitoring.

An immutable record of significant actions that occur within a smart contract.

A deliberate attack using code vulnerabilities to steal funds or break protocol functionality.

A special function that executes when no other function matches a contract call.

A DeFi strategy where users provide liquidity and stake tokens to earn high yields.

Fully Diluted Valuation (FDV) is the market cap if all possible tokens were in circulation.

The guarantee that a transaction cannot be reversed, achieved through consensus confirmation.

An uncollateralized loan borrowed and repaid within a single transaction, enabling atomic arbitrage and liquidations.

The minimum price at which an NFT from a collection is currently being sold on the market.

Fear of Missing Out (FOMO) is the pressure to buy an asset during rising prices to avoid missing potential gains.

A change to blockchain protocol rules, either backward-compatible (soft fork) or requiring all nodes to update (hard fork).

An early-stage governance discussion posted on a DAO's forum before official voting.

An NFT divided into smaller tradable tokens that allow multiple people to share ownership of a single asset.

The user interface of a decentralized application that lets people interact with smart contracts.

A transaction ordering attack where someone submits a transaction before a victim’s to profit from the victim’s trade.

Fear, Uncertainty, and Doubt (FUD) is negative sentiment or information that can cause investors to panic sell.

A 4-byte identifier that specifies which function in a smart contract to call.

A cryptocurrency used within a blockchain game for rewards, purchases, and sometimes governance.

The intersection of gaming and DeFi where players earn crypto through gameplay and can yield farm assets.

A non-fungible token representing an in-game asset with real ownership and tradability on a blockchain.

The unit measuring computational work and the associated fees required to execute transactions on a blockchain.

The maximum amount of computational work (gas) that a transaction or smart contract execution is allowed to consume.

A gas war happens when many users compete for limited block space by offering higher and higher transaction fees.

A gasless transaction is a transaction flow where the user does not pay network gas directly from their own wallet.

The first block ever created on a blockchain, establishing its initial state and foundation.

The processes and mechanisms through which decisions are made in a blockchain protocol or organization.

A discussion platform where DAO members propose and debate governance decisions.

A formal proposal submitted on-chain for DAO member voting on protocol changes, fund allocation, or governance matters.

A cryptocurrency token that grants holders voting rights in a decentralized autonomous organization or protocol governance.

A community group or organization within Web3 that pursues shared goals, often coordinating capital, gaming, or yield farming strategies.

A physical device that stores cryptocurrency private keys offline for maximum security.

A cryptographic function that converts any data into a fixed-size unique fingerprint.

A mathematical function that converts input data of any size into a fixed-size output called a hash, used for data integrity and security.

The computational power or speed at which miners solve hashes to find valid blocks in a proof-of-work blockchain.

A hierarchical deterministic wallet deriving many addresses from a single seed phrase using mathematical algorithms.

A cryptocurrency slang term meaning to hold your tokens long-term despite price fluctuations, rather than selling during downturns.

A malicious smart contract that allows users to buy tokens but prevents them from selling, trapping their funds.

A cryptocurrency wallet stored on internet-connected devices, optimized for convenience but with lower security.

A ZK-Rollup specifically optimized for NFTs and gaming with low-cost minting and trading.

The loss liquidity providers experience when token prices in a pool diverge from when they deposited.

An NFT representing ownership of an asset within a game (character, weapon, land, item).

A service that organizes and makes blockchain data queryable and searchable.

An increase in cryptocurrency supply over time, which can reduce the value of existing tokens if demand does not grow proportionally.

Token sale fundraising where projects sell newly created tokens to early supporters.

Token launch on decentralized exchanges, enabling permissionless fundraising with price discovery.

A blueprint that defines function signatures and behaviors a smart contract must implement.

The ability of different blockchain networks to communicate, exchange data, and work together seamlessly.

A digital asset (usually an NFT) that can be used across multiple games and platforms.

InterPlanetary File System is a decentralized peer-to-peer file storage where files are identified by content hash.

A geographic area or country where specific laws apply and courts have legal authority.

An encrypted file that stores a private key, secured with a password, used for importing/exporting wallet access.

Know Your Customera regulatory requirement for exchanges to verify user identity before allowing trading.

The main blockchain network that serves as the foundation for all transactions and security.

A separate blockchain system that processes transactions quickly and cheaply while periodically settling back to Layer 1 for security.

A popular hardware wallet brand that stores cryptocurrency private keys offline for secure asset management.

Smart contract protocols enabling users to deposit cryptocurrency and earn interest while borrowers obtain loans.

Using borrowed funds to increase exposure to an asset, amplifying both potential profits and potential losses.

Reusable smart contract code that other contracts can call to perform specific functions.

Government authorization and legal permission required to operate financial services like exchanges or custodians.

A liquid staking protocol allowing users to stake ETH and receive stETH tokens while continuing to use their capital.

Automatic sale of collateral when borrower's loan falls below required collateral ratio.

The ease and speed at which assets can be bought or sold without significantly affecting their price.

When a protocol cannot meet withdrawal requests because insufficient reserves, causing mass losses.

A smart contract holding equal values of two tokens that enable decentralized trading through automated market makers.

User who deposits cryptocurrency into liquidity pools to earn trading fees and provide DEX liquidity.

A random or earned item reward that players receive from completing game actions, often as an NFT.

The primary, live blockchain network where real transactions occur and have monetary value.

The moment a blockchain project transitions from testing to live, real-value production network.

A protocol for creating DAI stablecoin by collateralizing crypto assets through decentralized governance.

The total market value of a cryptocurrency, calculated by multiplying the current price by the total circulating supply.

The maximum total amount of a cryptocurrency that will ever exist, establishing scarcity and capping inflation.

The value extracted by miners or validators by reordering or censoring transactions for profit.

A cryptocurrency created as a joke or meme that has become a legitimate trading asset despite lacking fundamental utility.

The pool of unconfirmed transactions waiting to be included in a block.

A cryptographic proof that a specific data element is included in a Merkle tree.

A cryptographic data structure that efficiently proves the integrity of large datasets.

Data about datainformation that describes an NFT such as its name, description, image URL, and other attributes.

A widely-used browser extension and mobile wallet that enables users to interact with Ethereum DApps and manage their digital assets.

A persistent virtual world where users interact through avatars, own digital assets, and conduct activities.

Economic systems within virtual worlds where users earn, trade, and own digital assets using cryptocurrency.

The process of validating transactions and creating new blocks on a Proof of Work blockchain by solving computational puzzles.

The process of creating a new NFT and recording it on the blockchain.

A cryptocurrency wallet application designed for smartphones, enabling on-the-go access to digital assets.

A reusable code segment that adds restrictions or requirements to function execution.

A financial service provider that moves money on behalf of users, subject to regulatory licensing requirements.

Wallet or smart contract requiring multiple signatures from different private keys to authorize transactions.

Security model using multiple signatures to authorize transactions, preventing single points of failure.

A cryptocurrency wallet requiring multiple key holders to approve transactions for enhanced security and governance.

A unique digital asset verified on a blockchain that can represent art, collectibles, or digital ownership.

A computer running blockchain software that maintains a copy of the ledger and validates transactions.

A wallet where the user directly controls private keys, maintaining full ownership without relying on third parties.

Governance voting and decision-making conducted outside the blockchain, often using token-weighted voting on platforms like Snapshot.

Storing data outside the blockchain on centralized or decentralized storage systems, with only hashes stored on-chain.

A service that converts cryptocurrency to traditional fiat currency for withdrawal to a bank account.

A game where core mechanics, assets, and logic run directly on a blockchain.

Voting and decision-making that happens directly on the blockchain, with executable smart contracts.

An action or transaction that directly engages with a smart contract and is recorded on the blockchain.

A service that converts traditional fiat currency to cryptocurrency for purchase.

The largest NFT marketplace platform where users buy, sell, and trade digital assets.

An Ethereum Layer 2 using Optimistic Rollups to enable fast, cheap transactions while maintaining Ethereum security.

A service that provides external data to smart contracts, enabling them to interact with real-world information and data.

Attacking price feed oracles to artificially manipulate smart contract decisions.

A valid block that is created but rejected and not included in the main blockchain.

Smart contract feature allowing admin to pause functions to prevent exploitation.

Smart contract service that pays transaction fees on behalf of users.

Leveraged derivatives contracts that allow long/short trading without expiration dates.

Profile Picture NFT used as an avatar or identity representation online.

Social engineering attacks designed to steal private keys or wallet approvals.

A gaming model where players earn cryptocurrency or NFTs through gameplay, allowing them to monetize their time.

Game item fully owned by the player as an NFT that can be traded or transferred.

A sidechain solution providing Ethereum compatibility with independent security model and faster transactions.

The change in token price caused by a trade execution, especially significant on AMMs with lower liquidity.

A secret cryptographic key that proves ownership of an address and enables transfer of funds.

Consensus mechanism where validators secure the network by staking tokens.

Consensus mechanism where miners secure the network by solving complex computational puzzles.

Minimum token balance required to submit a governance proposal to the DAO.

The complete verifiable history of ownership and authenticity of an NFT.

Smart contract that delegates function calls to another contract, enabling upgradeable logic.

Cryptographic key derived from private key that enables others to verify your transaction signatures.

A cryptographic system using paired keys: public key for encryption/verification, private key for decryption/signing.

In-game reward token or NFT earned by completing a quest or objective.

Minimum participation threshold required for a governance vote to be valid.

The relative scarcity and uniqueness of an NFT based on its traits and characteristics.

Smart contract vulnerability where recursive calls allow draining funds before state updates.

Attack reusing a valid transaction from one blockchain on another blockchain.

Unveiling the final metadata of an NFT after minting, often a surprise reveal.

Smart contract instruction that cancels transaction and reverts all state changes.

Public development plan outlining project features, timelines, and milestones.

A Layer 2 scaling solution that bundles many transactions into a single transaction settled on Layer 1.

Automatic percentage payments to NFT creators from every secondary sale.

Network interface allowing applications to submit transactions and query blockchain data.

A scam where developers abandon a project after raising funds or draining protocol liquidity.

Checking transactions against government sanctions lists to prevent prohibited transfers.

A front-running variant where an attacker places transactions before and after a victim's to manipulate price and profit.

Blockchain's ability to process increasing transaction volume without reducing speed or decentralization.

An EVM-compatible ZK-Rollup providing Ethereum scalability with native bytecode compatibility.

Securities and Exchange Commissionthe US government agency regulating securities markets and overseeing investor protection.

Tradable financial instrumentsstocks, bonds, and in crypto context, some tokens regulated as securities.

Laws regulating investment securities to protect investors and prevent fraud.

A list of 12 or 24 random words that can recreate your wallet and all its private keys.

Limited-permission cryptographic key authorizing specific actions without revealing master key.

Independent blockchain running parallel to a main chain with its own validators and security model.

Request from an application asking user to cryptographically sign a transaction.

Cosmetic appearance NFT that changes how a game character looks without affecting gameplay.

A penalty mechanism where validators lose staked cryptocurrency for misbehavior or protocol violations.

The difference between the expected price and the actual executed price when trading, especially on AMMs.

A fixed time unit (~12 seconds on Ethereum) during which a single validator creates a block.

Smart contract functioning as a user account with programmable features and security.

Self-executing program stored on a blockchain that automatically executes when predefined conditions are met.

A professional security review of code to identify vulnerabilities, bugs, and potential exploits.

Potential for bugs, exploits, or logical errors in smart contract code to cause loss of funds.

A smart contract functioning as a user account with programmable security and features like social recovery.

Off-chain governance voting recorded on decentralized servers without blockchain transactions.

Wallet recovery mechanism using trusted contacts to verify identity and restore access.

A programming language for writing Ethereum and EVM-compatible smart contracts.

Non-transferable NFT permanently bound to a wallet representing identity or achievements.

A cryptocurrency designed to maintain a stable price by being pegged to a reserve asset.

Emerging regulations specifically targeting stablecoins to ensure they maintain dollar pegs and protect users.

Locking up cryptocurrency as collateral to participate in network validation and earn rewards on Proof of Stake blockchains.

An Ethereum Layer 2 using STARK proofs and Cairo language for general computation with superior scalability.

A Layer 2 scaling technique where participants transact directly with each other off-chain, settling only when necessary on Layer 1.

A variable stored permanently on the blockchain as part of a smart contract's data.

A DAO member granted specific governance responsibilities and decision-making authority.

The arrangement of state variables in a smart contract's storage, affecting gas costs and upgrade compatibility.

A GraphQL API that indexes blockchain events and data for efficient querying.

The release of previously locked or vested tokens into circulation, typically triggering market impacts.

A formal disclosure filed by financial institutions when they detect activity potentially related to money laundering or terrorism financing.

Trading one cryptocurrency for another on a decentralized exchange, executing directly from your wallet.

An attack where one entity controls multiple identities to gain disproportionate influence in a decentralized system.

A token whose value is derived from and tracks the price of another asset, without owning that asset directly.

A transaction or action that creates a tax liability under government tax law.

A parallel blockchain used for testing smart contracts and applications without risking real funds.

The number of transactions a blockchain can process per second.

A smart contract mechanism that enforces a mandatory delay before a governance proposal can be executed.

Digital representation of value or utility issued on a blockchain.

The division of a project's total token supply among founders, investors, community, and other stakeholders.

The permanent removal of tokens from circulation to increase scarcity and manage a protocol's burn rate.

The ongoing process of releasing and distributing tokens to recipients over time.

The initial moment when a token's supply is created and distributed to its first holders.

The total quantity of tokens in existence, including circulating, locked, and max supply.

A reference (URL or IPFS address) pointing to metadata describing an NFT's properties.

An economy where value is primarily represented and exchanged through blockchain tokens.

Economic model of a token including supply, distribution, incentives, and value capture mechanisms.

The entire amount of tokens that currently exist, including circulating, locked, and vesting tokens.

The total value of all assets deposited into a DeFi protocol, used to measure protocol size and user trust.

The total amount of an asset that is bought and sold during a specified time period.

An individual attribute or characteristic of an NFT that contributes to its rarity and value.

A signed record of value transfer, asset change, or smart contract execution on a blockchain.

The verification that a transaction has been included in a block and is now permanent on the blockchain.

The cryptographic authorization of a blockchain transaction using a private key, proving ownership and intent.

An AML regulation requiring that sender and recipient information travel with cross-exchange value transfers.

A smart contract or multisig wallet holding a DAO's collective financial reserves.

The portion of a project's token supply reserved for the DAO or project treasury for future use.

A hardware wallet that stores private keys offline, securing cryptocurrency through cold storage.

The largest decentralized exchange using automated market makers to enable token swaps without order books.

A smart contract whose logic can be updated after deployment, usually via proxy architecture.

An abstracted transaction request used in account abstraction, processed by a mempool and bundlers.

An NFT that provides functional benefits beyond collectibility, like access rights or in-game utility.

A token that provides access to services or features within a protocol or application.

Participant in Proof of Stake networks who validates transactions and creates blocks in exchange for rewards.

Virtual Asset Service Provider: a regulated entity that provides cryptocurrency custody, exchange, or transfer services.

The process of confirming that smart contract source code matches the deployed bytecode on the blockchain.

Schedule releasing tokens over time, preventing immediate large supply dumps.

A period during which no tokens unlock or become available, after which vesting begins.

A digital asset used as a medium of exchange or store of value, regulated as an asset class.

A persistent digital environment where users interact, own assets, and participate in economies.

The rate and magnitude of price changes, a measure of how fast and drastically an asset's price moves.

The process where token holders participate in governance decisions by voting on proposals.

The amount of influence a token holder has in DAO governance decisions, typically proportional to token holdings.

Python-like programming language for smart contracts emphasizing security and simplicity over flexibility.

A digital tool that stores cryptographic keys, allowing users to manage and control their cryptocurrency and NFTs.

A unique public identifier derived from your public key, used to receive cryptocurrency.

Linking your wallet to a decentralized application to authorize and sign transactions.

A software or service that manages cryptocurrency keys and enables blockchain interactions.

The next phase of the internet built on blockchain, emphasizing decentralization, user ownership, and reduced intermediaries.

A large holder of a cryptocurrency or token who has significant influence over market price and liquidity.

A list of approved addresses or users who have special privileges, such as early access to NFT mints or token sales.

A technical document outlining a blockchain project's design, goals, and implementation strategy.

A specialized sub-team within a DAO focused on specific functions or initiatives with delegated authority.

A yield farming aggregator automating strategies to maximize returns on deposited assets.

A strategy of depositing crypto into DeFi protocols to earn returns, often incentivized by token rewards.

A cryptographic method proving a statement is true without revealing the underlying information.

An Ethereum Layer 2 using Zero-Knowledge proofs for fast settlement and mathematically proven correctness.