THE FUTURE'S HERE,

AND WE'RE ENABLING IT

Today's blockchain technologies are not practical in the real world, and adoption is threatened as a result. Our mission is to build a truly decentralised Internet owned and run by the community, enabling the next wave of business models.

Atlas City is developing industry-specific instances built on the Catalyst Network.

Join our community to stay up to date with the latest news from us.

traction

About Atlas City

Atlas City is building a distributed computing solution that works in the real world: not forked, but written from scratch; a fair and efficient model of consensus, built from the lessons of first generation blockchains.

At Atlas City we're engaging with multiple industry participants. Innovators in supply chain, logistics, energy, law and financial services are among the first to adopt the Catalyst Network.

Atlas City will be launching Catalyst Network as an open source project in 2019 and will support the growth of the ecosystem by providing software development tools, distributed application development and private instances for industry-specific applications to enterprises.

Watch the Video

Introducing Catalyst

The Catalyst Network internal testnet is live. The developer testnet will be available in 2019. Third-party testing and development will take place in the second half of 2019.

Catalyst makes a decentralised Internet possible. Light, fast, secure, scalable and democratic, the Catalyst Network is a fully functional stack that works in the real world and rewards all its supporters.

The Catalyst Network is the first viable path to decentralising the Internet.

Efficient

It's inexpensive to use and easy to program. It promotes equitable reward and it has reduced energy consumption.

Scalable

The network is designed to scale to hundreds of thousands of validating and storage nodes providing nearly unlimited transaction throughput.

Accessible

Catalyst Network works with most common programming languages. It has the ability to convert and migrate from other chains and existing software applications.

Secure

Distributed File Storage is a better way to store, protect and share data that facilitates automation with authentication, authorisation, and confirmation/validation.

Whitepaper

Register your interest below and receive the latest version of our Whitepaper.

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Atlas Wallet

Your gateway to the decentralised internet starts with the Atlas Wallet

Atlas Wallet is a multi-currency wallet supporting Bitcoin, Litecoin, ERC-20 tokens and soon Catalyst Networks native token KAT.

Available for download on IOS and Android in 2019. Register your interest below:

wallet

Core Team

Atlas City is formed by an experienced team of computer science engineers, programmers, researchers and business experts.

uDarren Priestnall

Darren Priestnall

CEO & CTO

uDarren Priestnall

Darren Priestnall

CEO & CTO
About

Chief Executive Officer of Atlas City with more than 20 years of experience in the software engineering and technology industry. Chartered Professional Member of the British Computer Society (MBCS CITP) as well as a Certified Ethical Hacker (CEH), Certified Network Defence Architect (CNDA) and Certified Blockchain Professional (CBP). Darren has over 20 years industry experience development enterprise grade systems in industries including oil and gas, financial services, utilities, government, space, film and media for organisations including Deutsche Borse, Microsoft and Microsoft Partners, UK government agencies, BAE Applied Intelligence and a group digitally delivering movies to cinemas for film companies such as Disney/Marvel. Darren is also a passionate privacy advocate and ethical hacker and a true technologist. When he's not in the office he regularly speaks at conferences and other events as well as provide the occasional speaking engagement at universities such as the University of Oxford.
uChris Justice

Chris Justice

President & COO

uChris Justice

Chris Justice

President & COO
About

President & COO of Atlas City with over 30 years’ experience in finance and as an entrepreneur, including as CEO of an Internet-focused media and advertising company that he led from start-up to NASDAQ IPO. Prior to co-founding Atlas City with Darren and the team, Chris was COO and Head of Europe for Janus Capital International and then Head of Distribution Initiatives for Janus Henderson Investors. Chris began his career in the U.S. with Bankers Trust, and then spent over 25 years in Asia investing in and starting companies. Chris is an inquisitive follower of emerging technologies and understanding early on how they will impact and change the ways business is conducted. His passion for blockchain and distributed ledger comes from the understanding of how the technology will enable tremendous efficiencies for businesses and organisations and help individuals regain control of their personal data and online activities.
uJoseph Christopherson

Joseph Christopherson

Chief Marketing Officer

uJoseph Christopherson

Joseph Christopherson

Chief Marketing Officer
About

Co-founder and Chief Marketing Officer of Atlas City, he has a Masters degree in Architecture and Urban Design from Aarhus Architecture School in Denmark, one of Europe’s highest ranked Schools. Joseph's dissertation “The Digital Divide: The case for fracturing urbanism and emergence of technological mutability” was a study that looked at how technological advancements in our urban environments influence our behaviours and how innovation will continue to effect the way we inhabit the planet. Although Joseph has a design-focused background, he has always been passionate about technology and has studied computer science. He has won runner-up prizes for numerous Hackathons and was a top 10 finalist for Europe's largest Blockchain Hackathon in 2017. Joseph first got exposed to cryptocurrencies in 2014 after attending a Value Investing event. Applying his understanding of finance, technology and human behaviour he recognised the potential impact this will have across multiple areas of society and has been obsessed with it ever since.
uRobin Hudson

Robin Hudson

Business Development Manager

uRobin Hudson

Robin Hudson

Business Development Manager
About

Co-founder of Atlas City with 30 years’ experience in business development, change management and supply chain having held operational positions, including two full cycle SAP implementations, at three of the UK’s biggest blue-chip companies. He has significant international experience gained from roles in Sri Lanka, Romania, China, and Hong Kong, as well as in the UK. When not in the office Robin is a passionate self-taught Microsoft Excel VBA developer who has written applications to reduce repetitive time-consuming tasks to less than a second. He loves bringing complex ideas to life through animated PowerPoint presentations and has a reputation for assisting organisations to transform business processes using techniques learnt from the Accenture and Deloitte change management methodologies.
uJoanna Oliveiro

Joanna Oliveiro

Office Manager

uJoanna Oliveiro

Joanna Oliveiro

Office Manager
About

Joanna’s focus as a Document Quality Control for Abbott Diabetes Care in Oxford, was to update documents to improve production, processes and procedures in line with ISO standards and FDA regulatory requirements for medical devices. Prior to that she worked on an intense environment as a Senior Recruiter for Manpower facilitating BMW staffing requirements. She worked for Phones4U under the mobile phone insurance claims. She also worked for Morgan Stanley as an intern
uJames Kirby

James Kirby

Head of Engineering

uJames Kirby

James Kirby

Head of Engineering
About

James is a senior blockchain engineer at Atlas City. He’s an experienced backend engineer who masters a wide range of programming languages, like NodeJS, PHP and C# just to name a few.

He’s academic background in computer science, giving him a great understanding of all sides of product development, from system administration to system architecture, API development and mobile application development. James has worked as a system engineer for global companies such as Sony Music, BP, Aviva and Fidelity Asset Management, as well as blockchain consultant for Kodak. He’s an EC-Council certified ethical (most of the time #1337) hacker.

uUzair Qidwai

Uzair Qidwai

Strategy & Business Development Manager

uUzair Qidwai

Uzair Qidwai

Strategy & Business Development Manager
About

Uzair is a results driven and award-winning business leader with over 7 years of leadership experience managing cross-functional teams of 100+ employees, in a high pressure and competitive environment working for a blue-chip company in U.S. & Canada.

In that capacity he oversaw sales, operations, e-commerce & technology services and was also responsible for the successful integration of large acquisitions completed by his previous employer. Prior to joining Atlas City as a Strategy and Business Development Manager, Uzair co-founded and worked as a CFO for a FinTech startup in New York City. He recently completed his MBA from Imperial College London and is also a CFA level 3 candidate. As the president of the FinTech Club and Vice President of the Finance club, Uzair got exposed to blockchain and distributed ledger technologies and took a deep interest in the applications and deployment of these disruptive technologies within Finance. He is a strategic and innovative thinker and shares his thoughts by regularly writing for the Atlas Journal on Medium

uDr. Pauline Bernat

Dr. Pauline Bernat

Research & Development Manager

uDr. Pauline Bernat

Dr. Pauline Bernat

Research & Development Manager
About

R&D Manager at Atlas City with 10 years experience in Research and Development in cutting-edge technology. Pauline completed her PhD in Particle Physics at Paris University, where she studied the prospects for discovery of the Higgs boson at LHC, CERN. She moved to London to pursue academic research and teaching before turning to project management in Software Development for financial services. Passionate about justice and social rights enhancement through technology progress, Pauline has published numerous academic papers and submitted patent applications for blockchain-based solutions. Her research focused on smart contracts, anonymity and scalability improvement at the network level and group management solutions.
uFrancesca Sage

Francesca Sage

Blockchain Developer

uFrancesca Sage

Francesca Sage

Blockchain Developer
About

Fran is a blockchain engineer at Atlas City, working across the engineer and RR&D teams. Fran has a strong interest in cryptography and research. Her academic background is in physics, with postgraduate research in meteorology at Surrey University. She is experienced in both .Net and Python.
uStephen Horsfall

Stephen Horsfall

Blockchain Developer

uStephen Horsfall

Stephen Horsfall

Blockchain Developer
About

Blockchain developer at Atlas City, he has over 3 years experience in the IT industry developing successful web applications. Stephen first learned of the huge potential of blockchain technology back in 2012 when investing in bitcoin.

He realized the technology behind the cryptocurrency could help bring innovation to multiple areas of society. Stephen's interest in blockchain led to him writing his dissertation on "Using blockchain technology to combat counterfeit footwear", at the University of Stirling, where he graduated with a first class degree in Software engineering. In his thesis, he explored the tokenization of popular footwear using the Blockchain and NFC chips. In his spare time, Stephen enjoys attending open source tech meetups, exploring the great outdoors and watching his favorite team Celtic play football.

uSanjay Patel

Sanjay Patel

Blockchain Developer

uSanjay Patel

Sanjay Patel

Blockchain Developer
About

Sanjay has been programming for over 10 years. He knows multiple programming languages such as Java, C#, NodeJS, PHP, Ruby, JavaScript. He has experience in industries like gaming, healthcare, military, financial services and blockchain. He’s passionate about machine learning, being the main developer behind a software for seizure prediction. He also develops his own games on Unity3d.

uDennis Owusu-Ansah

Dennis Owusu-Ansah

Blockchain Developer

uDennis Owusu-Ansah

Dennis Owusu-Ansah

Blockchain Developer
About

Dennis is a software engineer at Atlas City, working on the core ledger technology. With an extended background in technology and business, he backs exciting and promising projects that are set to change industries. He has keen eye for disruptive trends and has worked with various technology stacks and has a background in computer systems engineering. He has worked with C#, Microservices, NLP, Machine Learning and asp.net core among others. Dennis has participated in few ICOs, and developed underlying technology for various blockchain companies. Currently, he’s a tech advisor to a Sharevest, and is also a tech lead at TradeRiser.

uJoseph Kearney

Joseph Kearney

Blockchain & Cryptography Specialist

uJoseph Kearney

Joseph Kearney

Blockchain & Cryptography Specialist
About

Joseph is a blockchain and cryptography specialist at Atlas City and a recent graduate from the University of Kent with an MSc in computer science. He had a primary focus on quantum attack on blockchain technologies, particularly looking at BitCoin, Ethereum and LiteCoin and their quantum resistance.

uTony Vazz

Tony Vazz

Community Lead & Marketing Specialist

uTony Vazz

Tony Vazz

Community Lead & Marketing Specialist
About

Community Lead and Marketing Specialist at Atlas City with over 10 years’ experience in content creation about technology, finance and geopolitics.

He is a cryptocurrency and blockchain fanatic, joining the space in 2012. In 2014 he participated in the launch of the crypto asset PesetaCoin, working remotely with a group of coders and cryptographers and taking ownership of forum content strategy, video marketing and SEO. Having worked for a financial newsletter editorial, he has gained experience in traditional financial markets such as commodities, stocks and bonds, as well as in new investing trends.

uDaniel Radu Casu

Daniel Radu Casu

Corporate Finance Advisor

uDaniel Radu Casu

Daniel Radu Casu

Corporate Finance Advisor
About

A close advisor to the founding team of Atlas City, Radu is an entrepreneurial finance professional with many years of investment appraisal, financial management and transactions advisory experience across several asset classes and geographies. He is involved in all aspects of regulatory compliance, oversight of financial reporting, finance raising and investor relations and really enjoys getting stuck in with the captivating commercial, strategy and technology development aspects at Atlas City.

His previous experience equity markets coverage and corporate finance advisory with Ernst & Young, ABN-AMRO/RBS and a number of large scale European industrial projects. He has recently covered senior executive roles with a number of successful early stage technology London start-ups in fintech, blockchain and artificial intelligence technologies. Radu is an ACCA qualified accountant and has an MBA from London Business School.

uBrian Gray

Brian Gray

Advisor

uBrian Gray

Brian Gray

Advisor
About

Brian has more than 25 years experience as a professional adviser in the financial services industry. During his time as a partner at Linklaters and Freshfields law firms he counselled many of the world's most active investment banks, private equity funds and companies on their most sensitive transactions in areas such as leveraged finance, equity, public and private m&a, restructuring and structured capital markets. Brian combines this experience with a deep understanding of new technologies and the global regulatory landscape.

Brian has a law degree from Oxford University.

Away from tech you are likely to find him on his bike.

uSir Mark Weinberg

Sir Mark Weinberg

Chairman of the Board

uSir Mark Weinberg

Sir Mark Weinberg

Chairman of the Board
About

Sir Mark Aubrey Weinberg is a South African born British financier. He is the Life President of St. James’s Place Wealth Management. Weinberg was born in South Africa and educated at King Edward VII School in Johannesburg.

He received degrees in commerce and law from University of Witwatersrand, Johannesburg, South Africa and practised as a barrister. He later received his Master of Laws at the London School of Economics, specialising in company law and wrote the book Takeovers and Mergers whilst at the London School of Economics. In 1961 he founded Abbey Life Assurance Company in London, which was one of the first companies to develop unit-linked assurance and where he formed one of the UK’s first retail property funds.

In 1971 he went on to found Hambro Life Assurance, subsequently called Allied Dunbar, where he was managing director until 1983 (it is now part of Zurich Financial Services), operating successfully in the insurance broker market as well as building up a large sales force. There he formed the first retail managed fund and originated the concept of the variable premium whole life policy. He was knighted in the 1987 New Year's Honours List. With Mike Wilson and Lord Rothschild he co-founded J. Rothschild Assurance, which became St. James’s Place Wealth Management, and was the second fastest company to join the FTSE 100. Additionally, from its founding in 2005 until 2016, he was the chairman of the Pension Insurance Corporation, a company set up to provide insurance solutions for pension scheme management, in particular for defined benefit corporate pension schemes.

He was deputy chairman of the principal UK regulatory body, the Securities and Investment Board, from its inception in 1985 until 1990, having been an adviser on insurance affairs to the Secretary of State for Trade and Industry. He is also the author of Weinberg and Blank on Take-overs and Mergers (1962), the standard legal textbook on the subject, now in its fifth edition (1989), which he wrote with Victor Blank. He was the co-founder of the Per Cent Club, a grouping of top companies committed to increasing companies’ charitable and community contributions, and deputy chairman of Business in the Community. From 1983 to 1991 he was the honorary treasurer of the National Society for the Prevention of Cruelty to Children and from 1985 to 1992 was a trustee of the Tate Gallery. He is an honorary bencher of Gray's Inn and is a governor emeritus of the London School of Economics. In 2013 he underwrote the development of CAERvest, a unique human cooling device that is used to treat heatstroke. He is also the non-executive chairman of Atlas City, a newly established company in the field of blockchain and of Blackout, a company which has developed a unique system for protecting data in the care of companies, as well as enabling schools to limit the use of social media by their pupils.

uRobert Hefner III

Robert Hefner III

Seed Investor

uRobert Hefner III

Robert Hefner III

Seed Investor
About

Robert A. Hefner III is founder and owner of The GHK Companies. He pioneered ultra-deep natural gas exploration and led the development of innovative technology necessary to successfully drill and produce the world’s deepest and highest pressure natural gas wells. In the 1970s, he was the lone proponent to accurately forecast America’s natural gas abundance, and a leader in the efforts to deregulate natural gas prices.

Hefner holds a geology degree from the University of Oklahoma, is a member of the International Council at Harvard’s Belfer Center, a Fellow of the Royal Geographical Society of London, a former Board member of the International Institute for Applied Systems Analysis (IIASA), and was inducted into the Oklahoma Hall of Fame in 2010. Hefner’s book on the past, present and future of energy development The Grand Energy Transition, was published by Wiley & Sons in 2009. The book was subsequently translated into Chinese and published by CITIC. A documentary based on the book is available free of charge at www.The-GET.com. Recently, the GHK Group has transitioned into investments specializing in biotech, blockchain and gas and oil royalties. Since 1985, Hefner has actively pursued his interest in China in the areas of energy, foreign affairs, and contemporary Chinese art, developing the internationally known Hefner Collection (www.hefnercollection.com).

Hefner and his wife, MeiLi, founded the Robert and MeiLi Hefner Foundation which sponsors educational trips to China for outstanding high-school students. The Hefners were the principal donors for the James R. Schlesinger Professorship of Energy, National Security, and Foreign Policy at Harvard’s Kennedy School. They live on a vineyard and winery estate near Charlottesville, VA which produces world-class natural wines

We're always looking for talented people to join our team. Learn about the many ways you can participate.

What's New

Have Any Questions?

Atlas City was started two years ago with a single goal in mind: solve the blockchain trilemma to realise the true potential of decentralised technology – to enable businesses to deploy real applications with the convenience of cloud and the resilience and trust of blockchain.
Originally, Atlas City was founded by Darren Priestnall, Chris Justice, Joanna Oliveiro, Joseph Christopherson, Robin Hudson, Edward Cole and Peter Creasy.
Atlas City is privately funded from founders and seed investors.
Atlas City was started in 2017. Initial funding was secured and full scale development began in early 2018.
We are located in a WeWork building at 2 Eastbourne Terrace, W26LG London, UK.
As of April 2019, Atlas City has 20 full-time employees and 5 contracters. You will find more information on the 'Team' section.
Catalyst Network is a distributed operating system, with applications as both a public network, and for enterprise users as a private network. There will be no coding language barriers, no architectural constraints. Fair reward for active users performing work for the network is a primary tenant of Catalyst. It is scalable, fast and lean with the ability to process confidential and non-confidential transactions.
Catalyst Network brings technological innovations that improves significantly upon past generations of distributed ledgers available. It solves the blockchain trilemma that it allows a decentralised system to scale while ensuring the privacy of its users. Catalyst Network is built to allow a very large number of devices to connect together, including IoT and smart home devices, which makes this system adaptable to real-world challenges notably, but not limited to, use cases applied to logistics and supply chain.
Catalyst Network is an eco-friendly decentralised operating system, thanks notably to a new consensus protocol that waste significantly less electricity compared to traditional DLTs. Moreover, the design behind distribution and synchronisation of the ledger database is such that the required set up cost and bandwidth will be a significantly lower compared to other blockchains, allowing new users to quickly and cheaply join the network. The consensus mechanism is also designed to ensure a fair distribution of rewards to users willing to contribute to the network maintenance. Indeed, the reward will be proportional to the amount of resource dedicated to the network management, allowing devices with limited resource to generate revenue. Users will have the ability to send either confidential or non-confidential transactions. The code-base is built on .Net core, and as such will be compatible with MacOS, Windows and Linux platforms. This architectural design of Catalyst Network makes enterprise adoption will be easier.
Catalyst Network implements a new class of consensus protocol that relies on the collaboration of nodes and as such ensure a fair distribution of reward to all without compromising on the security of the network. Catalyst Network differs from current distributed ledgers in its ability for users to hold confidential and non-confidential accounts and issue transactions at low fees. Indeed, blockchains such as Bitcoin and Ethereum are not truly anonymous, while on privacy blockchains, such as Monero, users only have the option to issue confidential transactions. Catalyst Network also takes a lean ledger approach when it comes to storing previous ledger updates. A node on Catalyst Network does not need to hold a copy of the entire ledger history in order to synchronise and contribute to the network management.
A node can assume different roles on Catalyst Network: it can be a user node, only relaying data to its peers; it can be a producer node, thus performing some work to maintain the ledger database and/or be a storage-only node that contributes to the ledger by providing storage space. Users with active/working nodes are rewarded with tokens, some of which are periodically injected to the system and some coming directly from transaction fees.
Catalyst Network implements a brand-new consensus mechanism which relies on the collaboration of nodes selected to build a ledger state update during a ledger cycle. Such protocol rests on democratic principles that take advantage of the variety of computing resource available across the network. Unlike proof-of-work based protocols, Catalyst consensus mechanism does not thrive for greater computing resource. The work performed by nodes to manage the ledger database is distributed uniformly according to the resources afford by participating nodes, preventing future hash rate war or risk for mining centralization.
KAT tokens are a medium of exchange used on Catalyst Network, enabling users to perform actions on the ledger such as accessing services provided on the network or storing and retrieving files. New KAT tokens are periodically injected in the system, following economic rules defined by the consensus-based protocol.
A blockchain is a peer-to-peer immutable decentralised ledger of information, within which transactions are sent, received and validated by nodes on the network. It can be considered a decentralised database. In traditional systems there is a central authority to handle transfer of data, goods and currency. Within a decentralised system such as a blockchain the consensus of the network users replaces the central authority without the need to trust the other users. Transactions created on a blockchain are bundled together into blocks, which are linked together using the hash of the previous block, hence the name blockchain. It provides an indefinitely traceable history of all transactions that have taken place on the network.
Blockchain technologies gain significant advantage over traditional databases in terms of speed and immutability as well as their decentralised structure. Traditional databases stored on a server are prone to failure if the server fails then the database will fail. In a decentralised system like blockchain, failure of one node will have little to no impact on the rest of the network, it is near impossible for enough nodes to fail at once in order to compromise the system. The immutability allows traceability and accountability, meanwhile in a traditional database it is far too easy for loss of data either through human error or malicious behaviour. Once a transaction is on the blockchain it is traceable indefinitely, this immutability and fault tolerance creates a use case for the use of blockchain for audits. Creation of a transaction on a blockchain is fast and requires very little bandwidth.
The generalisation of all blockchains are distributed ledgers, however not all distributed ledgers are blockchains can be applied. Blockchains are a series of intrinsically linked blocks of information, joined together by a cryptographic hash and the cryptographic hash of the previous block. Catalyst can be considered a DLT as unlike blockchains it does not use a block-based system where information is packed into intrinsically linked blocks that form a chain. Catalyst uses a ledger-based system where updates are made at each ledger cycle. These updates are used to change the overall state of the ledger.
Cryptocurrency is a token of value that is associated with and exchanged between users on a specific blockchain. Cryptocurrency is used by network users to perform actions on the blockchain such as payment to send a transaction as a part of the reward and incentive structure for validators. The blockchain validates the transaction of any of its associated cryptocurrency. This is to ensure that the transactions are fair (no tokens are created are destroyed) and the sender of the crypto has the relevant funds to cover the transaction. The comparison can be drawn that crypto is to blockchain what fiat currency is to a central bank. The Blockchain represents the economy and the transaction mechanisms that allow a cryptocurrency to be sent and received.
A node is a device connected to the other nodes (its peers) on a peer-to-peer network. A node could be a physical device, like a single-board computer, or running in a virtual machine or containers, such as Docker.
DFS refers to the Distributed File System module of Catalyst Network which allows files to be stored in an efficient and distributed manner. DFS is built upon the IPFS protocol. DFS is used to store files as well as historical ledger state updates. This removes the burden to user nodes to maintain the full history of the ledger database while allowing for fast retrieval of files as well as old ledger state updates. DFS is maintained by all nodes on the network. However, some users may choose to sell some of their node space to other users on the network and be paid in tokens.
Sharding with DLTs refers to techniques used to split the ledger database (or state) into sub-states (or shards) such that each shard can be managed by a dedicated pool of nodes and stored on some nodes in the network but not necessarily on all the nodes. Said otherwise, a node on the network needn’t hold an entire copy of the ledger state, but instead can hold some parts of it. As a network grows in popularity, scalable solutions are needed to allow more users to join the network and more services to be deployed, generating more transactions flow. Sharding techniques taking into account the interdependencies between shard can offer such solution.
Smart contracts are computer programs that define sets of rules and requirements and are deployed on the blockchain or ledger. Such program can be triggered by transactions or messages generated by other codes, or once certain requirements have been fulfilled. An example of which is a smart contract for a product that is being tracked on the blockchain, if the product arrives before a certain date then the user will automatically send a transaction paying for delivery. If the product is delivered after this date the smart contract may issue a lower transaction or no transaction at all.
An attack where a malicious user or group of users colluding together control more than 50% of the validation pool for a validation cycle. Potentially allowing them to perform bad validation in order benefit themselves.
Consensus is a method of reaching agreement on a list of proposed changes submitted by users during a period of time, to update the ledger database. Blockchains and distributed ledgers are managed by network nodes via consensus-based protocols. The consensus mechanism used by popular blockchains such as Bitcoin and Ethereum is based on the Proof-of-Work algorithm where nodes compete to solve a computationally hard problem. The probability that a node succeeds in producing the next valid block to append to the blockchain depends on the amount of computing resource of that node (a.k.a hashrate). The successful node receives tokens as reward for its contribution. The consensus mechanism of Catalyst Network takes a different approach, preferring a collaborative approach among nodes which allow any node to participate, regardless of the amount of resource available and ensure a fair distribution of the reward to all contributing nodes.
A fixed period of time after which the ledger state is updated using a plurality of deltas (or ledger shard state updates). It is a time period within which a selected group of transactions have their proposed ledger changes (debits and credits) enacted upon the ledger state. It is comparable to the block time in traditional blockchain. However the time period for a ledger cycle on Catalyst Network is not controlled by the difficulty of a proof-of-work algorithm but is a predictable uniform period of time.
A peer registered in the work queue can be granted a worker pass which entitles it to contribute to the ledger database management. It becomes a worker node (or simply worker) for a finite period of time. During each ledger cycle, some workers are randomly selected to update the ledger database. These nodes are the producer nodes (or producers).
This is a set of nodes willing to perform work on the network. During each ledger cycle, some workers are randomly selected to update the ledger database while others wait to be selected at a later time. Nodes stay in the pool of workers for a finite period of time. New nodes join as others leave the pull.
For each ledger cycle a subset of peers in the pool of workers are randomly selected to produce the ledger state update. At the end of a cycle the producers collect new tokens as reward for the work they performed. The amount of reward collected by a producer depends on economic factors as well as on the quality of work done by the said producer.
A transaction on Catalyst is a message broadcast on the network that represents the transfer of KAT tokens. It comprises of a list of transaction entries, a transaction signature generated by the users involved in the transaction (authorising the asset transfer) and other elements (timestamp, fees, range proof for confidential transaction). A transaction can be non-confidential (amount in a transaction entry is visible to all) or confidential (amount in an entry is obfuscated using zero-knowledge argument technique).
Each account stored on the ledger is defined by a balance in KAT tokens and a digital address used to receive or spend tokens. The address is a long string of characters, derived from a public key, itself derived from a private key. A private key is a random number chosen and solely known by an individual, while the public key and account address are not hidden. The private key is used to generate digital signatures associated to the transfer of tokens from and to account on the ledger, while the public key is used to verify ownership of accounts when processing such transfer.
During a ledger cycle, transactions transferring KAT tokens from and to these accounts are validated and forwarded across the network by all nodes and collected by selected nodes (producers) tasked with building the ledger state update. A ledger state update is a list of balance changes to apply to accounts stored on a ledger database, based on a set of transactions. Producer nodes must agree on the correct list of changes to apply to the ledger state at the end of the ledger cycle. An update also included the distribution of rewards to the producers, made of new tokens injected in the system as well as transaction fees.
A transaction within which the amounts of KAT tokens transferred from and to accounts stored on the ledger are not visible to all. Confidential transactions use cryptographic technics that obfuscate the amounts of tokens transferred in said transactions. Although a producer can verify the validity of the amount of tokens transferred (ensuring that a confidential transaction does not create new tokens), the actual amount remain hidden to the producer or any other users on the network.

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