Nervos Network
Nervos Network is a blockchain platform which consists of multiple blockchain layers that are designed for different functions. The foundational layer is known as the Common Knowledge Base, whilst the native cryptocurrency of this layer is called CKB. This foundational layer uses a proof-of-work consensus model. Smart contracts and decentralized applications can be deployed on any layer.
Nervos Network was founded in 2018 by Jan Xie, Terry Tai, Kevin Wang, Daniel Lv, and Cipher Wang.


== Architecture ==
Nervos Network utilizes multiple blockchain layers to for different functions. The base layer prioritizes security and decentralization, and is optimized to verify transactions. It can settle transactions submitted from upper layers and resolves disputes. Layer 2 and above are able to favor greater throughput demands of software applications.


=== NC MAX ===
Layer 1 achieves cryptographic consensus through proof of work, using a modified version of Bitcoin's Nakamoto consensus algorithm: NC-MAX. NC-MAX was presented at the Internet Society's Network and Distributed System Security (NDSS) Symposium in 2022. The consensus process uses a novel hash function called "Eaglesong."  Several manufacturers produce ASIC (Application Specific Integrated Circuit) machines to utilize the Eaglesong protocol to mine CKB token, including Bitmain Goldshell, and iBeLink.


=== Cell Model ===
The accounting method on layer 1 is an expansion of Bitcoin's UTXO model, and is dubbed the "Cell model". This model is programmable, thereby supporting smart contracts. Additionally, a cell is able to store data on-chain, such as non-fungible tokens (NFTs), compiled code, or serialized data like JSON strings.


=== CKB-VM ===
The CKB virtual machine (CKB-VM) is a software-based emulated computer that executes smart contracts on Nervos Network's base layer.  
Like the Ethereum virtual machine, CKB is a Turing-complete development environment, but also integrates the RISC-V instruction set.


=== Layer 2 ===
Two layer 2 blockchainsexist on Nervos Network: Godwoken and Axon. Godwoken is a blockchain protocol that can be configured to run virtual machines or consensus models. With this framework, larger numbers of transactions are processed and are then submitted in batches to layer 1 for subsequent verification. Godwoken runs the Ethereum virtual machine (EVM), allowing developers to use of tools and software developed for Ethereum while directly interfacing with Nervos and utilizing CKB. Axon is an EVM-compatible sidechain protocol optimized for higher transaction throughput.


== References ==


== Further reading ==
Bu, Hao; Sun, Meng (March 2020). "Towards Modeling and Verification of the CKB Block Synchronization Protocol in Coq". Formal Methods and Software Engineering. Lecture Notes in Computer Science. Vol. 12531. pp. 287–296. doi:10.1007/978-3-030-63406-3_17. ISBN 978-3-030-63405-6. S2CID 229344990. {{cite book}}: |journal= ignored (help)
Szepieniec, Alan; Ashur, Tomer (2020). "Eaglesong: An ARX hash with fast diffusion" (PDF). Proceedings of the Romanian Academy, Series A. Romanian Academy. 21 (1): 69–76. Retrieved 2022-10-05.
Zhang, Ren; Zhang, Dingwei; Wang, Quake; Wu, Sichen; Xie, Jan; Preneel, Bart (2019-04-01). "NC-Max: Breaking the Security-Performance Tradeoff in Nakamoto Consensus" (PDF). Network and Distributed Systems Security (NDSS) Symposium 2022. ISBN 978-1-891562-74-7.


== External links ==
Official website