Saga is a Layer 1 blockchain protocol that allows developers to design their own dedicated chains for running applications. Learn more in this article.

 universe right now is the lack of accessible tools for developers. Many people interested in designing new 

 projects struggle to find the right software developer kits (SDKs) for their projects. The Saga ecosystem aims to fix this issue by providing unparalleled support to app and game developers. 

Can the Saga ecosystem really become the premier chain for web3 development? Keep reading to learn how it works and see whether it's likely to attract new developers.

 blockchain protocol. It allows developers to design their own dedicated chains for running applications. People who work on Saga all share the same security, scaling solutions and SDKs, but they each get their own unique chain that they can customize to suit their needs.

 of technology, crypto and finance enthusiasts. CEO Rebecca Liao is a co-founder of the Skuchain project, the designer of the 

 and a former international corporate attorney. Other members of the founding team include former Tendermint executive Jin Kwon, Blocktech Ventures founder Bogdan Alexandrescu and 

. They realized that there was a major need for a development-focused blockchain specifically designed for game project development. Saga's mission has attracted many major investors, 

Saga aims to create a new system for web3 project developers. Currently, most developers have to choose between the ease of working on an established chain like 

 versus the convenience and customization of designing their own chain. The Saga team realized that the most effective option for game developers would actually be a combination of the two types of development environments.

Saga wants to let developers set up their own sovereign blockchain so they can decide how things like 

 and transaction fees work. However, Saga also aims to provide extensive support for developers in its ecosystem. Its underlying framework ensures that people still have excellent security and a reliable validator set, no matter what their gaming project is.

 ecosystem, whose interchain web development standard is a set of protocols that allows a broad variety of blockchains to communicate with each other. The Saga network uses the 

 and the shared security system of the Cosmos ecosystem to manage the network, and has created its own Layer 1 chain that runs the entire Saga ecosystem and can do things like automatically launching 

The Saga Mainnet handles each developer's compiled smart contract binary. However, it also runs parallel dedicated chains that function as virtual machine (VM) modules capable of handling a specific set of smart contracts. End users for blockchain games and other apps interact only with the dedicated blockchain, while the developer's system manages the fees and individual transactions on the Saga Mainnet.

All of the chains on Saga are validated through optimistic coordination, which requires every Saga validator to validate each chain in the Saga ecosystem via 

 validation, verifying transactions by temporarily locking Saga tokens.

The Saga network contains a lot more than just the basic features offered through the Cosmos SDK and ecosystem. In addition to the software development tools and helpful interface for Saga's validators and developers, the ecosystem also contains the following features.

The overall layout of the Saga ecosystem starts with the Saga Mainnet. Built on the Cosmos hub, this framework includes a full validator set and a dedicated blockchain for handling all smart contracts. The basic protocols are passed on to each child chain in the system, and information is relayed back and forth between the main chain and all of the secondary chains. Saga's validators stake tokens, and then check to make sure every element of the topology follows Saga’s regulations.

 are a method for creating a dedicated blockspace that a developer can manage. These chainlets function as virtual machines that can handle smart contracts and automatically launch Celestia rollups. Each chainlet is its own blockchain that handles nothing but a specific gaming project. Developers decide on the gas fees they'll charge users, and can add chainlets as their projects expand and require more throughput from the remaining validators.

Saga's shared security relies on both the Cosmos hub and its own set of validators to secure the network. Validators on Saga’s network are monitored by auditors who can catch potential issues with individual dedicated chains. If anyone in the validator set fails to properly confirm a smart contract, their staked tokens are automatically confiscated.

 is a publishing system for gaming developers who want to create their own blockchains with help from Saga. It offers infinite scalability, seamless 

 and transactions without gas fees. In addition to use of the Cosmos SDK, developers who choose to publish their game through Saga Origins receive access to a variety of helpful marketing and distribution tools.

 is an interconnected blend of all the developers and projects in the Saga system. Though each sovereign blockchain is fully independent of others, they all join together to offer users a variety of exciting web3 projects. People interested in checking out the latest blockchain designs can join the Multiverse and browse all the neat concepts built on Saga.

To help get the Saga validator system started, Saga released 

 to its community members. People were eligible for the 

 if they had participated in the staking program or played in tournaments to promote Saga ecosystem games. The airdrop eligibility period required remaining validators and other participants to be active between January and October of 2023. Once the airdrop began allowing people to claim tokens, it continued to run until Mar 27, 2024.

 consists of four separate phases. The company has already completed the Andromeda and Cassiopeia phases, which focused on designing the Mainnet and setting up the system of Saga validators. Currently, the Saga team is in the Pegasus phase, which is about releasing tokens and opening the Saga Mainnet to the public. Sometime in late 2022, Saga’s team hopes to reach their Mainnet V2 phase, which will prioritize a new version of the Saga Mainnet with more features and options for dedicated blockspace.

SAGA tokens are the primary method for paying fees on the Saga network. These tokens are also used for staking, and function as a method of confirming Saga transactions. There are a total of 

, of which around 90 million have thus far been released. Saga plans to distribute its tokens as follows:

SAGA is still in the early stages of its token launch. However, it’s already surprised investors, having debuted at $4.91 on Apr 9, 2024 before quickly surging to its ATH to date of $7.60. It then steadily declined over the next few days to its current price of $3.06 as of Apr 19, 2024.

 SAGA, with its experts believing SAGA’s price will reach $15.73 by 2025 and decrease in 2027 to $6.27, before rising again to $13.45 by 2030. This bullish sentiment is amplified by analysts at Changelly, 

 SAGA’s price will increase to $6.91 in 2025, $14.21 in 2027 and $44.36 in 2030.

Looking to trade Saga tokens? Bybit now offers SAGAUSDT Perpetual contracts. To get started, you’ll first need to 

, then fund it with cryptocurrency and navigate to the 

SAGA has done an extremely impressive job of attracting users, and seems poised to become the big coin debut of April 2024 with its high price.

However, it's hard to say whether SAGA can maintain its price in the long run. It's quite common for new startups to have a strong start and then drop in price once their project fails to take off. If the Saga ecosystem can’t attract new developers and continue to release impressive projects, investors could see some major SAGA losses in the future.

Since this coin is so volatile right now, investors need to 

. It has the potential for both big profits and big losses, so you’ll want to carefully consider how these price shifts might affect your portfolio. For best results, avoid investing more than you can afford to lose, make sure you diversify your investments — and 

By offering developers the chance to create their own dedicated chains, Saga offers a more convenient and scalable system for blockchain gaming. Its helpful features and low transaction fees have already attracted many people, and it's no surprise that many others are interested in the project. Furthermore, SAGA tokens have had a promising start with extremely impressive growth. If the Saga company can successfully capitalize on its early buzz, it has a bright future.

Intermediate

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Saga (SAGA): Catalyzing the Multiverse With Scalable Chains

Discover Masa, a platform empowering individuals to control and monetize their data, decentralizing AI storage and promoting ethical data sharing.

Few areas of the crypto industry are as popular these days as artificial intelligence (AI). AI-related tokens and projects experience some of the highest growth rates, with particular interest attached to generative AI technology and large language models (LLMs), all thanks to OpenAI's massively popular ChatGPT tool. This is no surprise, as blockchain technology has the potential to address many of the limitations of LLM algorithms, particularly those related to the issues of data and centralization of AI models.

The Masa network (MASA) is a new AI-focused crypto platform that brings a fresh paradigm to the world by allowing individuals to control and monetize their personal data. Its platform also contributes to the AI revolution by decentralizing the storage of both the user data and the LLMs utilizing it.

 (MASA) is a blockchain platform that provides access to user-consented, hyper-specific behavioral and personal data and decentralized LLM algorithms. 

The platform launched its operations on Apr 11, 2024. Masa operates as a subnet on the 

 (AVAX) blockchain. To enable cross-chain functionality, it has also integrated 

 technology. This lets Masa bridge assets, initially to two key blockchains, 

 (BSC), with additional chains to be added in the future.

Masa provides user-consented AI data that’s stored in a decentralized way. As of mid-April 2024, more than 40 million data points from over 1.4 million 

 user wallets are available via its permissionless data layer. Masa represents an entirely new decentralized AI paradigm: while most data providers use centralized storage solutions, its platform's data is always stored in a decentralized, blockchain-based format.

The data made available via Masa’s platform is user-consented for collection and privacy-protected using its Zero-Knowledge 

 (zkSBT) technology, which allows users to share their personal data securely and confidentially by storing this encrypted data on the blockchain. Thanks to the zkSBT, users can share fairly detailed personal data while protecting their identities and the specifics of their online activities.

This user-consented data is directly sourced from users through the Masa App and Masa Chrome browser extension with their consent. Users have complete control over their data, which is collected in a highly detailed, verified and ethical manner. 

As such, it's different from the typical user-aggregated data collected from the internet by companies. Compared to user-consented data, user-aggregated data tends to be less granular and, obviously, has ethical strings attached to it: in most cases, users don't consent to the collection of such data, or (at best) provide reluctant consent by clicking on annoying "Accept All Cookies" buttons.

While focusing mostly on user-consented data, the Masa platform also offers developers a way to access user-aggregated data for a richer data network. Using Masa's web data scraper, developers can extract data from websites, social media posts, blogs and online databases.

User-aggregated data is collected by data node workers via the Masa Oracle network and Masa Chrome extension and stored on the platform, benefiting from the 

In addition to datasets, Masa enables the decentralized execution of LLM algorithms, facilitated by the Oracle node workers, who leverage their surplus CPU and GPU computing power to run open-source LLMs for fine-tuning AI models.

The Masa project aspires to achieve goals crucial to the development of all data and AI industries. First, Masa allows individuals to completely control their own personal data by choosing what to share with the outside world while protecting their confidentiality. The blockchain-based storage mode also ensures the security of the stored data. Additionally, users can monetize access to their personal data, becoming a major beneficiary of its use.

All of these benefits are in stark contrast to the traditional way user data is collected, stored and used on Web 2.0 platforms. In this traditional mode, one is often unaware of what personal data is collected about them, as well as when and by whom. Although the data used for analytics purposes might be in an aggregated form, together with the details of other online users, individual users are still part of the "guinea pig" cohort whose details have been unceremoniously extracted and utilized without their knowledge or consent.

Moreover, when hit online with some fairly relevant advertising based on past search phrases, one begins to realize that data isn't always used in an aggregated format. In fact, its utilization can be quite personalized. And of course, in the traditional mode of data collection, we’re all rarely reimbursed for the data we share.

Another aim of the Masa project is to provide a secure and efficient decentralized infrastructure for running LLM algorithms. Traditional, centralized hosting solutions for AI models face challenges, such as technical capacity and security issues. For instance, many centrally hosted LLM-based solutions suffer from performance degradation when large numbers of users access them simultaneously. Masa's approach to leveraging decentralized resources for running open-source LLMs efficiently addresses these capacity limitations, providing enhanced scalability and reliability for AI applications.

Masa operates as a subnet on the Avalanche blockchain, using cross-chain communications supported by LayerZero to access other networks as well. Avalanche subnets are completely independent 

 networks with their own set of rules and functionalities. Subnets, including Masa, use Avalanche's validators, or a subset of validators, to secure the network and achieve consensus.

Besides the validators, the Masa network has another type of functional nodes — 

. These special Masa nodes play a critical role in providing structured data and advanced AI models while prioritizing data privacy.

The Masa Oracle network acts as a decentralized web scraper, gathering data from the internet and organizing it for AI training and development. This approach gives developers access to hyper-personalized training data to improve language model performance. It also supports the decentralization of LLMs, making them easily accessible without complex setup.

As mentioned above, users can manage access to and monetization of their personal data via Zero-Knowledge Soulbound Tokens (zkSBTs), which provide a secure way of providing access to users’ personal data without compromising their privacy.

 is the main gateway for users to interact with the Masa platform. It lets them provide access to personal data and earn crypto rewards by staking data in four different ways:

Masa’s native cryptocurrency, MASA, is a utility and 

 used to reward users for providing their data to the network. 

 MASA also earns you crypto rewards. Entities who wish to utilize data held by the network pay for access to it in MASA tokens. The token is also used to reward the Oracle nodes.

As a governance token, MASA lets you participate in votes on any changes and upgrades to the platform's rules or fee structure.

The token's supply economics doesn't specify a maximum cap. MASA's total supply is 1,588,866,523, which will be released gradually over a period of around four years starting in April 2024. Token supply allocation shares are per the table below.

The MASA token is available on Bybit via a 

. Bybit's Spot and Derivatives markets provide you with opportunities to trade hundreds of cryptocurrencies and crypto-based products. If you don’t have a Bybit account, you can easily 

 to access Bybit's range of crypto products and assets.

The Masa network is a refreshing addition to the data industry, whose user consent and privacy have been under attack for many years. The Masa platform puts data ownership in users' hands, allowing them to control access to their data and benefit from its monetization. As online privacy concerns and invasive Web 2.0 advertising shenanigans grow, more users will be attracted to Masa's unique data concept.

In addition to allowing individuals to control and monetize their data, Masa also contributes significantly to the development of 

, which is important because the decentralized mode of data and model storage championed by the platform has the potential to solve many technical limitations of LLMs and other types of AI algorithms. This is a network full of merit and promise; all it needs now is wider recognition and user adoption.

Advanced

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Masa (MASA): Powering AI With User-Centric Data Monetization

Today’s outperformer is LSK, which jumped 17.63% after Lisk partners with Velodrome to enhance blockchain access and drive ecosystem growth.

The SPX index is down 0.22% as the market anticipates less Federal Reserve rate cuts, considering the possibility of no cuts this year. The broader cryptocurrency market is up, with Bitcoin and Ether rising by 4.18% and 3.19%, respectively in the past 24 hours.

Lisk (LSK), launched on May 2016, is a cryptocurrency platform that enables developers to build decentralized applications (dapps) using JavaScript and TypeScript. It supports custom "sidechains" within its network, offering tools like a software development kit. Lisk has announced a partnership with Velodrome to support and expand its blockchain ecosystem. Lisk will purchase and lock $VELO tokens for voting, directing VELO emissions to key pairs on Lisk. This collaboration aims to support existing protocols on Lisk, attract new developers, and enhance blockchain accessibility and adoption in emerging markets. Velodrome will back Lisk's Layer 2 initiatives, aligning with the goal of creating a scalable, interoperable Ethereum future.

Check Out the Latest Prices, Charts, and Data of 

The Runes protocol is set to debut alongside Bitcoin's 2024 halving, heralding a new phase in Bitcoin's evolution by enabling the creation of fungible tokens directly on its network. This follows the impactful Ordinals protocol, which significantly expanded Bitcoin's functionalities. The Runes protocol will spark competition among developers to issue and acquire the first tokens, with global exchanges ready to support these tokens from day one. The halving event will also feature a race to mine a highly valuable "Epic" satoshi. As Bitcoin approaches this transformative era, extensive preparations and educational initiatives are underway to equip users for the forthcoming changes, marking a profound shift in Bitcoin's operational and cultural landscape.

Spot Bitcoin ETFs have yet another day of outflow, however, yesterday’s outflow was close to neutral. The market has seen fluctuating flows in these ETFs, with significant activity in some and none in others, reflecting mixed investor reactions. Recent substantial outflows echo trends from March, but analysts regard such fluctuations as typical for ETFs and not indicative of failure. Despite this volatility, the outlook for Bitcoin ETFs remains positive as they continue to draw institutional interest and shape market dynamics.

Avail, a blockchain data-availability protocol developed using Polygon’s SDK, has announced an airdrop of 600 million AVAIL tokens, marking its one-year anniversary since spinning off from Polygon Labs. The "Unification Drop" aims to bring together various blockchain communities by rewarding developers, governance contributors, educators, rollup users, stakers, and others who have significantly contributed to the ecosystem. Avail's infrastructure includes three segments: Nexus for cross-chain transactions, Fusion for liquid staking on chains like Ethereum and Bitcoin, and DA for scaling rollups through technologies like KZG commitments. The airdrop will distribute tokens to 354,605 wallet addresses and includes significant allocations for various roles across multiple blockchains, including Ethereum, Bitcoin, Solana, Cosmos, and more, emphasizing a unified Web3 environment.

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Runes Protocol Revolutionizes Bitcoin with New Token Capabilities Ahead of 2024 Halving

Nolus is a decentralized finance lending protocol with cross-chain capabilities. Learn more about how it works in this article.

One of the big advantages of decentralized finance (

) is that it provides more options for users. People who cannot get traditional loans because a typical bank deems them "high-risk" can turn to the DeFi sector to borrow crypto assets. The Nolus Protocol is a new DeFi lender that offers users all sorts of exciting opportunities. To see how this intriguing project works, explore this guide to learn all about Nolus.

 is a DeFi lending protocol. It has cross-chain capabilities that let people choose the most favorable rates possible and avoid the need to save up funds for liquidity.

Nolus was founded by Ivan Kostov and Kamen Trendafilov. Kostov worked in traditional finance, while Trendafilov has a background in marketing and business. During their time in these sectors, Nolus's founders realized that blockchain networks had the potential to revolutionize banking. They decided to join together and create a new leasing system that makes the most of DeFi products instead of just trying to mimic past banking methods.

Nolus started work on its plans in 2022 and officially launched its mainnet in 2023, having successfully completed several investing rounds and receiving 

 Token Metrics, Autonomy Capital, Everstake and more.

Nolus aims to tackle three problems common in crypto lending markets:

 software developer kit (SDK). Its code is entirely open sourced, and is updated and changed only when all stakeholders in the Nolus community vote to do so. According to the Nolus white paper, its ecosystem’s goal is “to build a novel user experience–driven automated money market” that facilitates direct interactions between lenders and borrowers without involving any other users.

The Nolus lending method starts with lenders choosing to supply 

 to the system. Any borrower who submits a down payment can get a loan from this supply of stablecoins. Both the coins and the down payment are 

, and interest is determined based on the value of the items. There’s no fixed repayment schedule, but the smart contracts ensure that interest is automatically removed from the collateral, and then paid to the lender at regular intervals. Once the user decides to repay the lease, the original assets are released from the smart contract.

Nolus's lending protocol includes many ways for customers to profit and enjoy convenient services. Here are the main DeFi products you can access through Nolus.

DeFi leasing on Nolus is designed to be as convenient as possible. Customers don’t have to go through a lengthy application or pay a lot of fees to other users. You just enter your collateral and get a loan of up to three times the value of the initial investment. Interest rates vary between 11% and 18%, based on the market value of the digital assets. The 

 allow the loan to be repaid on your own schedule. However, keep in mind that you pay more interest if you wait a longer amount of time to repay the loan.

If you want to earn money based on your existing crypto, you can join one of the many 

 on Nolus by submitting stablecoins in exchange for interest-bearing Nolus crypto. When you're ready to withdraw your funds and stop participating in DeFi leasing, you can cash out your Nolus tokens to receive your initial asset, plus any additional interest or network fees you’ve earned.

Nolus's system of money markets isn't the only thing they provide. Users who decide to 

 a crypto asset on Nolus can earn more money. The Nolus ecosystem offers the option of staking NLS tokens in exchange for various incentives. Lenders receive higher amounts of rewards for lending stablecoins, and borrowers get a lower interest rate.

Nolus has had some impressive growth since its launch in 2023. In just six months, the lending protocol has assisted with thousands of loans, collectively worth $8.6 million in total. Its team calculates that they've managed to achieve an average 

Nolus hopes to expand on this momentum in 2024. Its main plan is to continue marketing the lending protocol heavily, attracting more users who want to do their own research and find the best possible loans. To further attract users from the DeFi sector, Nolus aims to add more support for other crypto tokens and increase network liquidity. Nolus stands for community-led governance, so they don't have a long-term road map in place. Instead, they plan to evolve and adjust to suit whatever community needs arise in the future.

. It allows users to adjust their interest rates, and it's also a 

. People with NLS tokens can vote on how the platform is run and help implement new changes for the platform. The NLS token has a total supply of 1 billion. Nolus’s plan is to gradually mint tokens over a ten-year period, and implement a token buyback program to help maintain value. NLS token distribution will be as follows:

When the NLS token was released in the summer of 2023, Nolus prices were fairly stable. However, now that investors can sell their NLS tokens, prices have become more volatile. Starting in December 2023, NLS prices 

, and although the token currently seems to be dropping from its all-time high of $0.10, more price increases seem likely in the future.

Not only is the market for the NLS token quite bullish right now, but the Nolus lending protocol is also attracting a lot of positive attention in the crypto space. If the network can maintain its positive attention and attract more users, prices seem likely to rise even further. CoinCodex predicts Nolus prices will stay in the $0.04 to $0.19 range for 2025, and hit 

. This attitude is backed up by crypto influencers such as Crypto Revolution, 

 an underrated crypto with a lot of potential for growth.

The Nolus project is a well-thought-out crypto protocol that offers users significant advantages. Its innovative approach to lending could potentially attract a lot of users from the DeFi space. In addition to having a reliable system backed with effective technology and a detailed white paper, NLS digital assets have also experienced some promising growth patterns. The crypto asset has had a slow yet steady climb in price, and now that it's trending in crypto news, it seems poised to take off.

However, keep in mind that it's still important to 

 on digital assets. Some crypto investors might find it concerning that the Nolus project is mostly backed by marketers, instead of blockchain enthusiasts. There have also been some tech issues, such as the 

 that led to some unnecessary margin calls. Subsequent issues could limit price appreciation of its crypto assets. Therefore, it's necessary to approach Nolus with caution and not overextend your finances.

Nolus's DeFi lease system allows people to obtain easy access to crypto. Its innovative approach provides investors with significant advantages. Unlike traditional finance, there's no lengthy application process, and in contrast to many other blockchain networks Nolus doesn't have frequent margin calls or high network fees. As long as Nolus doesn't run into any technological issues or financial problems, its network is likely to have a lot of success in the DeFi space.

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Nolus (NLS): Crafting Liquidity's Future With Leading DeFi Leases

Crypto

Bitcoin

Bitcoin is built upon blockchain. But it has its complexities. Read about Bitcoin and the issue of scalability on the blockchain here.

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Bitcoin is a decentralized electronic cash system that makes peer-to-peer payment possible without going through an intermediary. The original Bitcoin software was developed by Satoshi Nakamoto, released under the MIT license in 2009, following the Bitcoin whitepaper, 

Bitcoin: A Peer-to-Peer Electronic Cash System

. Bitcoin is the first successful implementation of a distributed cryptocurrency. Ten years after Bitcoin was born, as of December 2019, it has about 18 million Bitcoins in circulation and it has reached about a 132 billion 

In Bitcoin, a transaction is a collection of inputs and outputs transferring the ownership of Bitcoins between payer and payee. Inputs instruct the network which coin or coins the payment will draw from. Those coins in the input have to be unspent, which means they have not been used to pay someone else.

Outputs provide the spendable amounts of Bitcoins that the payer agrees to pay to the payees. Once the transaction is made, the outputs become the unspent amounts to the payee; they remain unspent until the current payee pays someone else with the coin.

When, for example, Alice needs to pay Bob 10 BTC, Alice opens her Bitcoin wallet, and scans or copies Bob’s transaction address and creates a transaction with a 10 BTC payment to Bob. Once the transaction is digitally signed and submitted, it is sent to the Bitcoin blockchain network:

Once the transaction is broadcasted to the Bitcoin network, the bookkeeper node, usually a full node in a P2P network that receives the transactions, will validate it according to Bitcoin protocol rules. If the transaction is valid, the bookkeeper will add it to the transaction pool and relay the transaction to the peers in the network. In a Bitcoin network, every 10 minutes, a subset of network nodes, called “mining nodes” or miners, will collect all valid transactions from the transaction pool and create the candidate blocks. They also create a Coinbase transaction for themselves to get rewarded and collect transaction fees, in the event they win the mining race and add the block to the chain, all nodes will verify the new block and add it to their own copy of the blockchain. Magically, Bob will be able to see the payment from Alice and 10 BTC in his wallet.

One of the major concerns in the Bitcoin network, or in general for any PoW-based blockchain is scalability. By design, every transaction has to be verified by all nodes, and it takes about an average of 10 minutes to create a new block with the block size limited to 1 MB. Block size and frequency limitations further constrain the network’s throughput. As a result, a Bitcoin block is able to accommodate around 2700 transactions on average.

With today’s payment systems, VISA is able to handle on average around 2,000 

 (tps), the daily peak rate is around 4,000 tps. Paypal handled an average of 115 tps in late 2014, around 10 million transactions per day.

Clearly, achieving Visa-like capacity on the Bitcoin network isn’t feasible today. To achieve the network’s higher performance and better scalability, it requires increasing the network’s transaction processing limit and making the software enhancements for the Bitcoin network.

There is the blockchain scalability trilemma regarding its capability to address scalability, decentralization, and security, without compromising any of them. The trilemma claims that it is almost impossible to achieve all three properties in a blockchain system.

The following diagram is an illustration of the scalability trilemma in the blockchain:

The key challenge of scalability is finding a way to achieve all three at the base layer. The design choices of Bitcoin favor decentralization and security, while making a sacrifice in scalability.

There are many Bitcoin scalability solution proposals, it can further be divided into On-chain scaling and Off-chain scaling.

On-chain solutions, sometimes also called layer 1 solutions, are to look for solutions to address scalability and performance issues at the base layer of the Bitcoin blockchain network. With on-chain scaling, It refers to the solution of the latency of the network. It provides a way to be able to handle more transactions in the blockchain, Segwit is an example of that by processing more transactions in a block of 1MB. Or just simply by raising the blocksize, as Bitcoin Cash did.

Segwit is a Bitcoin Improvement Proposal number BIP14, it is short for segregated witness, which means to separates the digital signature for the transaction. It was first introduced by Developer Pieter Wiulle at the Scaling Bitcoin conference in December 2015. The purpose of SegWit was to prevent nonintentional Bitcoin transaction malleability, allow optional data transmission, and to bypass certain protocol restrictions.

A Bitcoin transaction comprised of three things: a transaction input, a transaction output, and an amount with digital signatures.

The transaction input is the Bitcoin address from who sent it.

The transaction output is the Bitcoin address to who receives it.

The amount is the amount of Bitcoin that was sent with a digital signature that verifies the sender is eligible to send the coins.

The transaction identifier changes if the digital signature changes. It turns out that Bitcoin’s code allows digital signatures to be altered when a transaction is still unconfirmed. Once a transaction is added to the network, the transaction, including the signature, becomes immutable. The signature alteration is done in a way that if you run a mathematical check on it, it is still valid by the network. However, when you run a hashing algorithm on it, it gives a different result.

Previous tx: p9k5ee39a430901c91a5917b9f2dc19d6d1a0e9cea205b009ca73dd04470b9a6

scriptSig: 304502206e21798a42fae0e854281abd38bacd1aeed3ee3738d9e1446618c4571d10

90db022100e2ac980643b0b82c0e88ffdfec6b64e3e6ba35e7ba5fdd7d5d6cc8d25c6b241501

scriptPubKey: OP_DUP OP_HASH160 201371705fa9bd789a2fcd52d2c580b65d35549d

The input in this transaction imports 20 BTC from output #0 in transaction p9k5e… Then the output sends 20 BTC to a Bitcoin address (expressed here in hexadecimal 2013… instead of the normal base58). When the recipient wants to spend this money, he will reference output #0 of this transaction in an input of his own transaction.

• Previous tx — an identifier of the previous transaction to the address A;

• Index — input number (here we have only one input number 0);

• scriptSig — first part of the validation script (contains a transaction signature);

• Value — the number of Bitcoins to send in satoshi (one bitcoin = 100 millions satoshi) — 20 bitcoins in the example;

• scriptPubKey — second part of the validation script, which also contains the receiver address B.

To verify that one can spend the amount of the previous transaction, it needs to check combine the scriptSig of a new transaction with the scriptPubKey of the previous transaction, to make sure the result is true and valid.  scriptPubKey simply checks the equality of the public key and the validity of the signature – OP_CHECKSIG

In a Bitcoin transaction, txid is a sha256d hash of all the fields of the transaction data. The value of txid depends on scriptSig.

During a mining node process transaction, the node can mutate scriptSig that the signature will stay valid, the transaction will have the same effect, but txid will change.

For example, one can add a OP_NOP operation (that does nothing). Or for some sophistication, one can add two operations: OP_DUP OP_DROP (the first one is duplicating the signature on the stack, and the second one removes it again). The signature is still valid, but txid changes.

Another example like signature value was “3”, but we can change it to “03” or “3+7-7”. Mathematically, it’s still the transaction value with a valid signature, but there are different hash results since hashing depends on how you write the value and not the value itself.

 for an existing transaction can be problematic for a number of reasons:

If you want to build second layer solutions on top of the Bitcoin network, like the network, you need to make sure no one can alter the first layer since it relays on it.

Modifying txid can cause issues if you’re spending or accepting unconfirmed funds.

In SegWit, all the malleable information is separate from the transaction into a separate “witness data”. When computing txid, it will not include this malleable information, in this case, the identifier will never be able to change, the problems will be fixed. Here is an Segwit transaction output example:

0014a4b4ca48de0b3fffc15404a1acdc8dbaae226955

30450221008604ef8f6d8afa892dee0f31259b6ce02dd70c545cfcfed8148179971876c54a022076d771d6e91bed212783c9b06e0de600fab2d518fad6f15a2b191d7fbd262a3e01

039d25ab79f41f75ceaf882411fd41fa670a4c672c23ffaf0e361a969cde0692e8

We can see that there is witness information, the data include all the malleable information. Sigscript have much less hash information compared to the previous example without the Segwit transaction. This also means it reduces a Bitcoin transaction size and improves transaction speeds by removing the witness data from the original portion and appending it as a separate structure at the end.

Node performance – The transaction size is reduced, the Bitcoin network is less congested so that nodes can verify blocks, or transactions, quicker.

Transaction malleability – As we discussed, with Segwit,  the signature moved from the transaction data to a witness data block. Transaction id (txid) is immutable and protects transaction data from being hacked.

Linear scaling of signature hashing operations – By reducing transaction size, we can add more transaction data for a certain transaction as a batch. Segwit separates transaction signatures out from transaction data so that each byte of a transaction only needs to be hashed no more than twice.

Increased security for multi-signature transactions – SegWit provides two different scripts; one to a public key and another directs payments to a script hash. With combine these scripts, Segwit boosts security by enabling a multi-signature transaction.

Building on top – SegWit is great for the Bitcoin development of second layer protocols, like its lightning network. SegWit activation also boosted development work on other features such as MAST (which enables more complex Bitcoin smart contracts), Schnorr signatures (which would enable another transaction capacity boost) and TumbleBit (an anonymous top-layer network).

Protects Lightning Network – Lightning Network Micropayment channels rely on double-signed transactions to lock the initial deposits. To start a Lightning Network payment, the funds from both parties are sent to one double-signed address. To prevent cheating, the transaction should be double-signed before any funds are actually sent there. Both parties need to synced to collect the outputs of transactions from to the main blockchain. This required transaction id is immutable, that is where SegWit comes to the rescue.

SegWit, in theory, can double Bitcoin’s throughput to approximately six TPS. While it is very important for Bitcoin network improvement, but this theoretical doubling of transaction throughput still remains too low for mainstream use of Bitcoin as a payment system.

Another proposal to improve Bitcoin’s scalability on-chain is to increase the block size. The idea is superficially simple: increasing the block size from today’s 1 MB to, for example, 8 MB would increase transaction throughput eight-fold. Some of the altcoins, like Bitcoin Cash. The BCH blocks were initially 8MB, currently a BCH block is at 32MB. This is similar to the vertical scaling approach to add more transactions in one block. However, Increasing the block size means blockchain can be many times larger and that would require better computing capacity in order to process large-sized blocks. At the same time, this would decrease the security of the network to some extent due to the decrease of effective honest hash power. This may also lead to a scenario where a network is concentrated into a few rich hands and, thus, may ultimately compromise decentralization and security, the main tenets of the blockchain.

One is security concerns. It is a common belief that the network is more secure if more network nodes participate in transaction processing in the blockchain. With the wider distribution of altcoin chains, fewer nodes will operate on any given blockchain. This may make the blockchain less secure, since a smaller altcoin network may be more vulnerable to network attacks. Let us say, we have about 10,000 nodes on the larger network, it will require at least 5,001 nodes (or called 51%) to be compromised to launch an attack on the network. If we slice 10,000 nodes into 50 smaller chains, each chain comprises 200 nodes, and it only requires 101 nodes to take down any smaller chain, which is what we call a 1% attack problem. Another issue is cross-chain integration. Although there are some solutions for handling cross-blockchain integration, the overall complexity of integrating smaller chains and altcoins will increase drastically.

Segwit2x was a proposed compromise to the block size debate back in 2017. It suggested that Segwit will be activated as a first step, and after that, the block size will be increased to 2mb. This proposal was not accepted by the majority of the Bitcoin network.

Similar to the rationales for an on-chain solution, the Bitcoin community is also actively looking for off-chain solutions, sometimes called layer 2 solutions. In off-chain scaling, the solution is to build extra layers on top of the Bitcoin blockchain and to do process all kinds of transactions with two participants. These transactions could then be batched and sent as one transaction on the blockchain. One of these off-chain solutions is called the Lighting network.

In Jan 2016, a white paper- The Bitcoin Lightning Network: Scalable Off-Chain Instant Payments was submitted by Joseph Poon and Thaddeus Dryja. Here the contours of the Lightning Network were described.

Lightning is a decentralized network using smart contract functionality in the blockchain to enable instant payments across a network of participants.

Bitcoin Blockchain Performance and Scalability

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