Nexa is a Layer-1 blockchain that is designed with scalability in mind, aiming to handle over 10 billion transactions per day while staying decentralized. It provides native token services and offers smart-contracts similar to Ethereum Virtual Machine (EVM) contracts, but without the major scaling bottlenecks suffered by account-based networks.

Nexa also supports the creation of both fungible tokens and non-fungible tokens (NFTs) natively, without the need for special smart-contracts or token standards like ERC-20. This provides a great deal of flexibility for developers and users.

Nexa is building a Layer-1 ecosystem that can:

• Provide instantaneous quick transactions suitable for P2P, P2B, and B2B transactions, utilizing Bitcoin Unlimited's 0-conf technology with double-spend proofs, and instant finality through an optional smart contract-powered solution.
• Scale to global demand without compromising on decentralization with 100,000 to millions of TPS. Enabled by a revolutionary POW algorithm, known as NexaPOW, that removes the major bottlenecks to scalability: signing of signatures and UTXO lookups. Mining energy on Nexa will no longer go to waste to merely order/provide consensus; it will allow the chain to scale, increasing speed, and reducing the necessary data storage of the blockchain.
• Provide a 1-click experience for token issuers with highly programmable native tokens and smart contracts on L1 without compromising on security. It enables practically everything possible on an EVM chain without the major scaling bottlenecks suffered by account-based networks.

Things you need to know:

• Experienced development team, Bitcoin Unlimited, comprises veteran blockchain architects and software developers who have worked extensively with Bitcoin and Bitcoin Cash. The dev team has over 70 years of combined experience.
• Nexa was launched to combine the best technology in scaling, fast transactions, tokens, and smart contracts all together on one chain.
• Bitcoin Unlimited is self-funded with dev team commitment and funding for at least 5 years.
• 100% Fair Launch, No ICO, No Premine, No VCs, No organizational instamine through cloud infrastructure.
• Community Project: Third-party developers and builders are welcome, and there are Community Funding Pools for special initiatives only (e.g., exchanges, specific marketing, etc.).

The Nexa Approach

In recent years, there has been no shortage of funding, use cases, and ingenuity for building Layer-1s. However, current platforms compromise on scalability, decentralization (Proof-of-Stake), smart contract security (EVM), user experience (multi-chain hassle/MEV), and dApp composability (sharding). Nexa doesn't compromise at all. It leverages a novel consensus algorithm called NexaPOW to scale. In simple terms: The network scales as miners compete to optimize their hashing power through software optimization & hardware acceleration.

NexaPOW will utilize hardware acceleration to make the two bottlenecks of scalability, finally scalable: Schnorr signatures and UTXO look-ups. Nexa also includes Graphene and X-Thin technologies which efficiently transmit blocks, allowing Nexa to dynamically scale blocks beyond a gigabyte (gigablocks) without the risk of miner centralization. This hyper-scalable UTXO design would only be limited by the internet bandwidth of nodes.

How Nexa Approaches Smart Contracts and Tokens?

Although the Ethereum and EVM ecosystem has trailblazed DeFi as we know it, it has also been a vehicle for the speculation craze in governance tokens (with little to no utility) and shiny JPEGs sold as NFTs. Ironically, the two most successful dApps, Uniswap and Opensea, do not require a governance token to function and have captured the vast majority of the volume. The root cause of all these dApps not solving real-world problems lies in Turing Complete VMs (like EVM), which basically means "I can do any computation I want within a block." While initially useful in pushing DeFi to new heights, they are still primitive at best and ill-suited for any kind of automation in the outside world. This lackluster adoption real-world adoption can be attributed to the following problems as dApps advance in complexity:

• Attack vectors for hackers and bugs increase, both requiring expensive audits that slow down development.
• Required block space increases, eventually throttling the blockchain and making transactions too expensive.

Nexa aims to greatly simplify smart contract deployment while not compromising on complexity. It uses an upgraded version of Bitcoin script that is highly secure and efficient. Its functions are decided top-down and go above and beyond what DeFi currently has to offer. By the end of summer 2023, Nexa will offer NexScript, a higher-level Javascript-like language simplifying smart contract creation on the Nexa network. Creating Tokens will also be a snap with the Nexa Tokenize App which will allow users with zero coding skills to launch tokens on Nexa Chain. With a user-friendly interface, developers of all skill levels can easily create and launch projects. The aim is to make the platform accessible and user-friendly for all, attracting more businesses and driving adoption and growth.

Native tokens and NFTs on Nexa can serve a wide array of use cases, such as tickets, in-game items, supply chain, identity, certifications, collectibles, gift cards, marketing, stablecoins, credits, ICOs, loyalty points, community, DeFi staking, and voting. Nexa will also enable even more complex use cases like chain-issued stocks, options, bonds, and DAOs with high degrees of programmability and security. NexScript could potentially bring highly efficient yet advanced DeFi without compromise.

In Summary

Nexa will be the most scalable chain on the planet by removing the key bottlenecks to scalability. The key bottlenecks to allowing blockchain scaling on a PoW and UTXO-based network can be summarized as:

• Bandwidth: how much data can be sent between nodes.
• Speed: validating transactions.
• Storage: space to store the blockchain.

Bandwidth has already been solved by B.U. using our graphene technology, ensuring that increasing the block size does not cause orphans. Speed can be improved through the NexaPOW algorithm, which forces miners to optimize their hardware for SHA256 hashes, Schnorr signatures and UTXO look-ups. Storage gets reduced massively by miners only needing the UTXO set instead of the full blockchain.

With these core technologies, and a unique approach to Smart Contracts and Tokens, Nexa has the potential to fulfill the shortcomings seen by Bitcoin, Ethereum, and other chains while remaining decentralized, proof of work (a commodity and not a security), open source, permissionless, and fair.