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Glossary
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- MACD The Moving Average Convergence Divergence (MACD) is a trader's technical indicator used to determine the momentum and direction of a market. The main concept behind this indicator is to compare two exponential moving averages. One of them is usually a short-term average, and the other is usually a long-term average. The MACD signals changes in trend strength and direction based on whether these averages are moving closer together (convergence) or spreading further apart (divergence). This indicator comprises three parts: the MACD line, the signal line, and the histogram. Traders typically recognize an upward crossing of the MACD line as a buying opportunity. The same thing on the opposite side, when the MACD goes below the line, it may be a signal for selling or that the trend is weakening. The histogram offers a clear representation of the two lines' differences making it straightforward to recognize momentum either building up or diminishing. Traders look at MACD over different timeframes, (ie: minutes, hours, or days) to fit their trading plan. Also, it can be used with other indicators like RSI or volume to confirm signals and lower the risk of making mistakes. MACD is not a fortune teller, but it certainly assists traders in grasping the shifts in momentum and spotting possible critical points for entering or exiting.
- Mainnet In crypto, a mainnet is a sovereign, functional blockchain that executes actual transactions with real-world economic value. It is the "live" version of a protocol. Unlike a testnet, which acts as a zero-risk sandbox for developers to break code, the mainnet is where the stakes are permanent. If a transaction happens here, it stays on a public ledger forever. Most projects start their lives as placeholder tokens on an existing network, typically as ERC-20 contracts on Ethereum. The shift to mainnet is the moment of truth. Once the genesis block is live, the network must defend against real exploits. A project's Fully Diluted Valuation (FDV) is no longer based on a roadmap; it is now priced against actual performance, security, and hardware requirements. For investors, a mainnet launch is the ultimate "de-risking" event, yet it often functions as a brutal "sell the news" trap. Early buyers who participated in seed rounds or testnet incentives frequently use the mainnet hype as exit liquidity to dump their positions on retail traders. Post-launch, the focus shifts to on-chain metrics like Total Value Locked (TVL) and developer activity. A mainnet without users is just a ghost town with a high market cap. It is the transition from a speculative "what if" to a verifiable, decentralized economy.
- Market Cap Market capitalisation, often referred to as a market cap, shows a company’s value on the stock market. You find it out by multiplying the company's share price by the number of outstanding shares. Here's a simple way to picture it: if you had enough cash to buy every share of a company, the market cap tells you the price tag of the entire company. If a company has 10 million shares trading at $50 each, then its market cap is $500 million. People who invest use market cap to size up companies and stack them against each other. A $10 billion company absolutely towers over a $100 million one. The market sorts companies into groups based on their market caps. Large-cap ones have a market cap of over $10 billion. These include Apple and Microsoft. Mid-cap companies land between $2 billion and $10 billion. Small-cap ones come in under $2 billion. Why does market cap matter? It shapes how risky an investment gets. Bigger companies tend to hold steady but don't zoom up in value quickly. Smaller ones might rocket upward, though they can crash just as fast. Market cap never stays the same: it changes with the share price. When people get bullish on a company, they buy its shares, the price climbs, and the market cap swells. Bad news? Watch it shrink. Understanding market cap means you choose investments that actually make sense and build a portfolio that is stable. To find the market cap of crypto companies, you can check coinmarketcap.com and coingecko.com
- Market Maker A market maker is a player in the financial markets who has the responsibility of keeping the trading activity alive by always being ready to buy and sell an asset. They do not wait for trades to happen but instead place orders simultaneously on both sides of the market which in turn, allows others to enter or exit their positions without long delays or extreme price swings occurring. The market makers make profit from the small difference (spread) between their buying and selling prices. Instead of speculating on price direction, they rely on volume and consistency. They help the market by executing a large number of trades at a small margin, thereby stabilizing the market and increasing its efficiency. In cryptocurrency markets, the role of the market makers is very significant as the liquidity may be low, especially for new or low-volume tokens. Most exchanges require the assistance of professional market-making firms to keep the order books alive and avoid drastic price fluctuations. On the other hand, traders could be left with the difficulty of not having their orders executed at fair prices. The role of market makers is on the opposite side of that of a trader who speculates. They are continuously willing to trade and thus a service to the market. They are, however, offered lower fees or incentives that are available for the exchanges.
- Market Order The market order functions as a directive telling an exchange to conduct an immediate cryptocurrency transaction at the best available market price. The primary purpose of a market order functions to execute trades without regard to their particular market prices. The execution of an order starts when the order gets placed and it ends only after every order in the order book gets completed starting from the nearest available price. Traders use market orders to enter or exit their positions because these orders allow them to make trades with extreme fastness. The market experiences this situation when news breaks or prices change abruptly or when market conditions shift with high intensity. Market orders execute almost instantly under typical conditions when sufficient market liquidity exists to support the order. The main risk associated with market orders is price slippage. The execution price will differ from the price which the trader expected because the order gets executed at existing market prices during that time period. A trader who places a large market order in a market with rapid price changes and low liquidity will have their order executed across multiple price points which will result in them receiving a less advantageous average execution price. Market orders achieve their optimal performance in markets that maintain high liquidity levels through major Bitcoin and Ethereum trading activities on large exchanges. Slippage risk decreases in these markets because deep order books with narrow spreads enable efficient trade execution. But In smaller markets, market orders can lead to poor execution due to wider spreads and limited depth.
- Market Taker A market taker is someone willing to buy or sell an asset at its current price. To put it simply, a taker is the one who “takes” the price that is already on the order book. This generally occurs via a market order, where the trade is carried out without delay at the best price that is available from the other traders. Market takers are the ones who are paying for speed and certainty. They are not waiting for someone to come in at the price they want, but they just hit the buy or sell button and are filled immediately. Therefore, takers end up paying slightly higher fees on exchanges, as they affect the liquidity by taking away rather than adding to it. Liquidity is a critical factor in this scenario. Each time buyers or sellers take a position instantly, they reduce the number of open orders on the book. On the other hand, market makers are placing orders at their desired prices and waiting for other traders to match them, thus creating liquidity for the market. Market takers normally operate quickly during fast price movements when traders would rather not miss out on an opportunity or risk the price changing. Takers are also a significant factor in the case of highly volatile crypto markets where speed is prioritized over accuracy.
- Maximum supply Maximum supply refers to the absolute maximum number of coins or tokens that a cryptocurrency can ever exist. The project code which contains the limit and the protocol rules which govern the system both establish permanent boundaries that require network governance to change before any alterations can take place. No creation of new tokens can happen after the maximum supply has been achieved. Many cryptocurrencies use maximum supply limits as essential elements of their system design. For example; Bitcoin establishes itself as the most famous cryptocurrency because it has a maximum supply limit of 21 million coins. The hard cap creates digital scarcity which prevents unlimited inflation from occurring. Other projects establish a maximum supply to inform users about the future token distribution. Some cryptocurrencies establish maximum supply limits while others do not. Some networks permit continuous token creation through mining and staking rewards and inflationary model distributions. Supply growth in these situations occurs through emission rates which operate without a predetermined limit. Investors use maximum supply limits as a crucial factor to evaluate a project’s future value. The total supply and circulating supply of a cryptocurrency differ from its maximum supply. The total supply shows existing tokens, while the maximum supply establishes the total number of tokens that can ever exist. On the other side, the circulating supply shows the number of tokens that remain active in the market at any particular moment. The separate definitions of these two terms help experts assess token economics through their distinct functions. The crypto industry uses maximum supply in its reports to explain three main concepts about cryptocurrency value which include scarcity and inflation risk and asset evaluation. The concept helps clarify why certain assets maintain their value without losing worth through deflationary or dilution-resistant mechanisms. The maximum supply of a project helps readers understand how the project will develop its supply in the future while showing them the supply details that will cause price pressure over time.
- Mempool A mempool serves as a temporary storage space which needs to store cryptocurrency transactions that have not yet received confirmation through a block entry. A user sends a transaction, which first needs to enter the mempool before it becomes part of the blockchain. The transaction waits in the mempool until a miner or validator selects it for processing. Bitcoin operates with proof of work networks which allow miners to select transactions from the mempool based on their attached fees. Miners prefer transactions which pay higher fees because these transactions deliver them more substantial rewards. The mempool becomes congested because users must increase their fees when network usage rises which leads to longer waiting times. The size of the mempool functions as an indicator which shows the current level of network congestion. The mempool experiences increased transaction volume when block space demand rises which leads to longer confirmation delays. The mempool empties faster during times of minimal network activity while transaction fees show a tendency to decrease. The network nodes each keep their individual mempool versions, which generally show commonalities. A transaction will be dropped by certain nodes after it stays unconfirmed for an excessive time if its fee does not meet current market conditions. The mempool plays a vital role in crypto reporting when journalists report on transaction costs and network delays and sudden increases in user activity.
- Metadata The term metadata describes data which gives information about other types of data. Metadata functions as a secondary element which provides essential information about sources and times and structural elements and contextual aspects. The digital environment uses metadata to enable systems which handle data to achieve better operational outcomes through improved data management and tracking and data understanding. A blockchain system stores metadata in its transactions and blocks through usage of timestamps and wallet addresses and transaction fees and block numbers. The public can examine all the metadata of blockchains because the system allows open access to blockchain data. NFTs and tokenized assets require metadata for their operational functions. The metadata for NFTs describes digital items by showing their name, description, image link and traits. Marketplaces use this metadata to display NFTs which users can use to confirm the contents of a token. Metadata hosting problems create situations where changes to metadata lead to uncertainty regarding permanent data status and ownership rights.
- Metaverse The metaverse refers to a shared virtual environment where users can interact with each other, digital objects, and immersive spaces through the internet. The metaverse describes virtual worlds which use cryptocurrency and blockchain technology to enable users to possess digital assets and use virtual tokens within their decentralized systems. The concept itself predates crypto and was originally popularized in science fiction. The technology industry and blockchain development teams have adopted this term to describe online environments which enable users to interact socially while working and playing games and attending events and trading digital assets. Users can enter these virtual spaces through computers or virtual reality headsets or mobile devices. The blockchain-based metaverse platforms use NFTs to represent digital assets which include virtual land and digital avatars and virtual clothing and virtual collectibles. Users can purchase and sell virtual assets because ownership information is stored on the blockchain system which enables users to conduct transactions without relying on a centralized system. The native tokens serve three functions which include transaction processing and governance and in-game economic systems. The metaverse experienced its most substantial growth during the 2021 crypto market cycle when people started buying virtual land and digital collectibles at higher rates than before. User interest has declined because market conditions changed and user growth reached its peak. Developers need to resolve three main issues which include system capacity to handle growth and ability to keep users engaged and maintain economic viability of their products. Crypto news reports link the metaverse to three main topics which include digital property rights and video games and online virtual markets and new web-based social networks. The project aims to create a system that combines virtual reality technology with decentralized finance and ownership of digital assets. The metaverse currently shows its developed form through blockchain technology which enables users to use digital assets for social connections and different virtual experiences.
- MiCA The MiCA regulation is the first comprehensive regulatory framework introduced in the EU for digital assets. The regulation was approved in 2023 and went into effect in 2024. The purpose of the MiCA regulation is to bring some clarity and transparency to the ever-evolving crypto market, allowing consumers and investors and businesses across all EU member states to operate under the same known and consistent regulatory services and obligations. In a nutshell, under MiCA, crypto-asset issuers and crypto-asset service providers (including crypto-exchanges, wallet providers, stablecoin issuers) are obligated to register with a national regulatory authority and follow a certain set of obligations. MiCA largely takes care of some issues regarding reserves, user protection, and the disclosure of risk and operation. In the case of stablecoins, the exposure to risk will require an additional level of regulation in order to mitigate financials stability and to protect the euro. MiCA will also answer one of the biggest issues for the crypto market itself; legal uncertainty. Prior to MiCA, each EU member state developed its own siloed manner of regulating crypto, making it increasingly difficult to transnationalize crypto business. MiCA offers an established operating structure that lets firms licensed in any single member state, offer their services running through other EU member states.
- Mining Rig A mining rig is a professional and powerful computing configuration set up specifically for mining digital currencies, most frequently those using Proof-of-Work consensus, such as Bitcoin or Monero. Mining rigs, as opposed to the regular PCs, are meant to carry out just one job: solving complex mathematical puzzles used for validating the transactions in the blockchain. On the other hand, miners are rewarded with the generation of coins and payment of small fees. A mining rig is nothing more than a few graphics cards connected to a basic motherboard, or several ASICs (Application-Specific Integrated Circuits), which are solely designed for mining. The more powerful the rig is, the faster it can compute the calculations and the greater the opportunity of winning the rewards. Mining rigs are not only dependent on a constant supply of electricity but also on proper cooling and regular maintenance. To begin with, mining produces a lot of heat and rigs are often stored in the ventilated rooms, warehouses, or containers that have fans or industrial cooling systems. Over the years, mining difficulty went up and rigs also transformed from hobby setups into the optimized and professional-grade equipment. Currently, the mining rigs are playing the major role in the PoW networks, providing the computing power to the areas that are far off, which makes the network secure and decentralized.
- Minting Minting refers to the process of creating new digital tokens on a blockchain. The term can be used to describe the creation of new coins, which occurs through mining and staking, but people mainly use it to describe NFTs. A user who mints an NFT creates a new token which he permanently records on the blockchain. NFT projects use smart contracts to handle the process of minting their tokens. A user connects a wallet which leads him to approve a transaction while he pays a network fee. The user’s address receives ownership of a unique token which the smart contract creates. The token becomes part of the blockchain’s permanent record after confirmation. Minting applies to fungible tokens. The contract mints tokens when a project creates new tokens according to its established supply rules. Some tokens require a single minting event while other tokens permit multiple minting events under specific requirements. The term borrows from traditional finance which describes how governments create actual currency through their minting process. Blockchain systems use digital processes to create new currency but their function duplicates the minting function of traditional systems. Crypto reports use the term minting to describe NFT launches and token releases and supply expansions. The process explains how new digital assets enter the market while it describes how users establish ownership through onchain methods. The process of minting enables readers to comprehend how decentralized networks produce and distribute tokens throughout their entire existence.
- Moonshot Moonshot is a term used in cryptocurrency markets to describe an asset or project that experiences, or is expected to experience, an extremely large and rapid price increase. The word describes a movement that carries Romeo in moonshot toward the sky. The two elements reflect high risk and high-reward expectations through their different growth patterns, which develop at a constant pace. The term moonshot describes small market capitalization cryptocurrencies which newly enter the market but draw high interest from investors in crypto communities. Investors view a project as a potential moonshot when they believe it will experience rapid value growth. The term is often used to describe investment opportunities that exist in their beginning stages when investors still work to determine actual market value. Moonshots depend on three factors which include market momentum and market narrative and market hype while ignoring actual fundamental market values. Social media trends and influencer attention and exchange listings and viral marketing create sudden market interest. Genuine innovation or new technology can lead to fast growth in some cases. Moonshots experience high volatility which results in extreme price changes that move in both upward and downward directions. The risk involved causes most moonshot investments to undergo significant value declines. When demand decreases or market sentiment changes, all gains begin to reverse. The trading restrictions on smaller tokens will create more extreme price changes in both directions. Crypto reports use the term moonshot to show how investors expect market behavior to develop while they do not approve of it.
- Moving Average One of the simplest yet most effective tools in the technical analysis arsenal is the Moving Average (MA) which assists traders in determining the overall trend of a market. The MA takes the price data and averages it over a specified time period thus removing the short-lived price movements from the market analysis. Hence, one can easily see the trend and the noise created by sudden price swings is minimized. Different moving averages exist, but basically they all do the same thing: they indicate the price movement's overall direction. To monitor recent activity, a trader may adopt a short-term MA, such as 20 or 50 periods, while longer MAs, such as 100 or 200 periods, are used for recognizing broader trends. A moving average usually indicates strength or bullishness when price moves above it, but it can also mean weakness or a bearish trend when it drops below. Besides that, traders always keep an eye on the interaction of different moving averages. For example, when a shorter MA cuts through a longer MA from below, it could be interpreted as a transition to an uptrend. Although moving averages do not give price forecasts, they are able to clarify market behavior for traders. Simply put, an MA indicates the direction the market has been taking thus allowing one to easily detect trends and consequently trade with more assurance.
- MA One of the simplest yet most effective tools in the technical analysis arsenal is the Moving Average (MA) which assists traders in determining the overall trend of a market. The MA takes the price data and averages it over a specified time period thus removing the short-lived price movements from the market analysis. Hence, one can easily see the trend and the noise created by sudden price swings is minimized. Different moving averages exist, but basically they all do the same thing: they indicate the price movement's overall direction. To monitor recent activity, a trader may adopt a short-term MA, such as 20 or 50 periods, while longer MAs, such as 100 or 200 periods, are used for recognizing broader trends. A moving average usually indicates strength or bullishness when price moves above it, but it can also mean weakness or a bearish trend when it drops below. Besides that, traders always keep an eye on the interaction of different moving averages. For example, when a shorter MA cuts through a longer MA from below, it could be interpreted as a transition to an uptrend. Although moving averages do not give price forecasts, they are able to clarify market behavior for traders. Simply put, an MA indicates the direction the market has been taking thus allowing one to easily detect trends and consequently trade with more assurance.
- Multi-sig Multi-sig, short for multi-signature, refers to a type of cryptocurrency wallet that requires more than one private key to authorize a transaction. The system of multi-sig wallets enables multiple users to control transfer approval instead of granting complete authority to a single user. The execution of a transaction becomes possible only after the specified number of signatures has been obtained. A wallet may be configured to require two out of three signatures before permitting fund transfers. The system operates with three distinct private keys, yet it requires only two keys for transaction authorization. The design protects against system breakdown because it establishes multiple operational paths. The user can still access funds with secure access through remaining authorized keys when one key gets lost or stolen. Organizations and decentralized autonomous organizations and crypto projects that manage treasury funds use multi-sig wallets as their standard security solution. The system enables teams to create shared control which operates as an internal control mechanism. The process requires multiple participants to reach a shared agreement instead of allowing one person to make all choices. The primary benefit which multi-signature systems provide to organizations stems from their capacity to enhance security. The systems deliver protection against three different threats which include theft and insider misuse and accidental transfers. The systems introduce new complexities to their operation. The system will experience transaction delays when required signers cannot be located and when coordination between parties breaks down. Multi-signature authentication appears in cryptocurrency reports about three main topics which include treasury management and protocol governance and security incidents. Organizations use this method as their standard procedure to handle substantial amounts of digital currency. The readers who understand multi-signature systems will learn how blockchain networks enable different parties to govern systems while they share power to make critical decisions about operations.
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- NFA NFA stands for Not Financial Advice. If you’ve spent more than five minutes on Crypto Twitter, YouTube, or Discord, you’ve definitely seen the letters NFA. It’s one of the most common acronyms used in the space, from big-name influencers to casual traders. Since the crypto space moves fast, you see expert opinions flying everywhere. And since giving actual financial advice often requires a professional license and comes with serious legal responsibilities, people use NFA as a disclaimer. It’s a way for someone to share their excitement about a new coin or a chart they’ve analyzed while making it clear that they aren't your financial advisor. Essentially, it’s a "don't sue me if this goes to zero" safety net. It reminds the reader that the responsibility for the trade lies with them, not the person posting. Many crypto personalities put "NFA / DYOR" (Do Your Own Research) right in their social media profiles to cover all their posts at once. You might see it in X posts where people hype up a token or say that an ecosystem is going to the moon! They remember to accompany that with an NFA caveat.
- NFT An NFT, or Non-Fungible Token, is a digital asset that is unique and can be used as a proof of ownership of a unique object. The fundamental distinction between currencies such as Bitcoin or Ethereum and NFTs is that the latter is unique. A blockchain keeps the record of the ownership of each token, which means that two tokens cannot have the same value and one cannot be replaced by another. NFTs are mostly associated with artwork, music, collectibles, photos, virtual land, and game items. The purchase of an NFT grants the buyer a verifiable, blockchain-validated certificate that he is the owner of that item. When the NFT is held by its owner, he owns the original token that the blockchain recognizes as legitimate, even if there are replicas of the image or file on the internet. The main driver of the popularity of this technology is that it provides artists with new potential avenues for selling their work directly to buyers. The artists can create NFTs, determine their prices, and even receive royalties with each resale—these factors support the NFT market. On the other hand, collectors appreciate NFTs for the aforementioned attributes of rarity, traceability, and the fact that they own something digital that is scarce. An NFT is fundamentally an ownership proving tool for digital assets that is secure, transparent, and can be verified via the blockchain. Hence, it opens a new digital market for trading and non-fungible items.
- NGMI "Not Gonna Make It" is the go-to slang for calling out a total train wreck. Whether it's a sketchy project or just a really bad investment move, people use "NGMI" as a blunt, sarcastic way to say someone is headed for failure. It definitely sounds a bit mean, but it's basically the community’s way of giving a harsh reality check to anyone making rookie mistakes. It's the opposite of WAGMI, which means "We're All Gonna Make It" and spreads hope and happiness. Zyzz, a fitness influencer, made WAGMI popular, but NGMI, its opposite, was used to make fun of people who didn't have the self-control to reach their goals. By 2019 the term cropped up in Urban Dictionary entries, but it really took off in crypto during the 2020–2021 bull run. As memecoins, NFTs, and DeFi exploded on platforms like Reddit and Twitter, traders borrowed it to call out panic sellers, rug-pull projects, or anyone chasing bad hype. Almost everyone in crypto uses NGMI, from traders to degens, NFT collectors to crypto project founders. It's used more often during market dips or when a token crashes. Some real-world examples of how the term is used include "You sold your Bitcoin during a 10% dip? NGMI." It is addressing the panic selling in the market. NGMI is sharp and can sting, so it's not always friendly. It sometimes starts arguments on social media. But it also reminds people to think twice, do their homework, and avoid emotional trades.
- Node A node in crypto is nothing more than a computer or a similar device that is part of the blockchain network. These nodes keep track of transactions, check their authenticity, and also help prevent problems like double-spending (using the same cryptocurrency twice). The blockchain network is not monitored by a central authority. The nodes keep track of everything. For instance, when someone sends a Bitcoin, nodes all over the world check the blockchain history to make sure the sender has enough money. They send the transaction to other nodes if it is valid, and it is finally added to a block in the blockchain network. There are three types of nodes: Full nodes: they have the heaviest responsibility. They download and store the entire blockchain—currently over 700 GB for Bitcoin—allowing them to fully and independently validate every transaction and block. Light nodes: people also call them SPV nodes. They don't download the full blockchain. Instead, they just pull in the basic outlines (the block headers) and whatever details they need. They let the full nodes handle most of the checking. That's what makes them perfect for phones or anything that can't handle a giant download. Mining nodes: they always run alongside a full node. They round up all the transactions waiting to get confirmed, put them into a proposed new block, and then battle it out with other miners to solve a crypto puzzle. The one who cracks it first gets to slap that block onto the chain and walks away with the prize—freshly created coins and the fees from those transactions. This approach is precisely why cryptocurrency does not require middlemen like banks. The nodes carry out all verification tasks. There are simple requirements to be a part of the node system: a computer, software, and an internet connection.
- Non Custodial In crypto, non custodial could refer to a wallet or exchange where you're fully in charge of your cryptocurrencies and private keys. So only you have total control over your digital assets, as only you know the secret codes that let you access and spend your coins or tokens. No middleman, like a bank or centralized exchange, can hold onto them for you. It's your responsibility if something goes wrong, but that also means that no one else can freeze your account or mess with your money without your permission. When we talk about non-custodial wallets, we're talking about apps or hardware devices that only you can access. If you lose your recovery phrase, the company can’t "reset" your password because they never had access to it in the first place. Similarly, on a DEX, you swap coins directly from your wallet. The exchange never holds your money during the process. Fitting examples would be MetaMask or Trust Wallet; these are software-based non-custodial wallets. When you set them up, you’re given a 12-to-24-word seed phrase. That phrase is the literal key to your money. There are also cold storage hardware wallets like Ledger and Trezor. These wallets keep your keys offline, which makes them the best option for non-custodial security. You can also use platforms like Uniswap to trade crypto without giving a middleman control of your assets.
- Nonce In crypto, a nonce is short for "number used once." It is a simple but crucial number, usually a 32-bit integer, that miners change repeatedly to solve a mathematical puzzle and add new blocks to the chain. In proof-of-work systems like Bitcoin, each block has a block header with fixed information. This information includes the previous block hash, Merkle root (summary of transactions), timestamp, difficulty target, and the nonce. What happens is that miners take all this information, run it through a hash function, and get a hash with 256 bits. The network sets a difficulty target that the hash must be below a very small number (lots of leading zeros, e.g., starting with many 0s). Because the hash function is deterministic and extremely sensitive to input changes, even flipping one bit produces a completely different hash. Since most header fields are fixed, miners can't easily alter them without invalidating the block. The nonce is the adjustable field. Miners start with nonce = 0, hash the block, and check if the result meets the target. If not, increment nonce to 1, hash again, and repeat billions or trillions of times per second across the network. The "proof" in proof-of-work is the discovery of a valid nonce, which indicates that the miner actually put in computational effort. After being located, the block is added to the chain, broadcast, and confirmed by others. The block reward and fees are given to the victorious miner. Similar nonces were used for mining in Ethereum (prior to The Merge), but Ethereum also makes use of a transaction nonce, or a per-account counter, to guard against replay attacks and guarantee that transactions are completed in the correct order. Mining nonce transforms brute-force guessing into the energy-intensive competition that maintains the integrity and tamper-resistance of proof-of-work chains.
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- Off-Chain Off-chain refers to actions, transactions, or processes that occur outside the blockchain. The approaches do not concern the blockchain directly and thus are not depending on it in terms of speed, cost, or even congestion. Off-chain systems handle most processing independently, settling only the final results on the blockchain when needed. Among the off-chain activities, one can find actions as simple as signing a transaction before submitting it or possibly there are very complicated systems such as payment channels, sidechains, or Layer 2 networks. Nevertheless, the concept is the same in each instance: the primary chain is relieved of its workload and the outcome is still secured and validated. One of the most well-known off-chain actions is the Lightning Network for Bitcoin. Where normally on the blockchain, every small payment would be recorded, the users would first go on to the off-chain channel and open a payment channel. They can transact an unlimited number of times, super-fast, and without getting public. Only when the channel is closed, is the balance that the final one is disclosed on-chain. In other words, off-chain simply implies that the activity takes place outside the blockchain and only the minimum necessary information is eventually recorded on-chain.
- On-Chain On-chain refers to any activity, transaction, or data directly recorded on a blockchain. When an event happens "on-chain," it is included in the everlasting history of the blockchain, and it can be seen by anyone as well as being protected by the consensus rules of the network. Such kinds of activities include sending coins and tokens, engaging with a smart contract, generating NFTs, participating in a DAO, or confirming a block. The reason for on-chain actions being included by the blockchain is that they receive the main features of the network: openness, unalterability, and security. A transaction cannot be modified or deleted once it is confirmed. Anyone can check it using a block explorer, which gives users the ability to monitor the distribution, engage in contract activities, and the flow of funds without depending on a single authority. Normally, on-chain transactions come with the cost of a fee, frequently termed “gas”, because the computers of the network have to handle, confirm, and keep the data. As a result, on-chain operations are seen as very reliable but at the same time being the most costly or slowest, particularly when the network traffic is high. However, many of the latest protocols now opt for "off-chain" processing to enhance the speed factor, submitting only the final results back to the blockchain. Nevertheless, the on-chain layer still holds the truth.