, the world’s largest smart contract blockchain in terms of monthly active users, has recently launched the opBNB testnet, an (EVM)-compatible L2 chain scalability solution based on Optimism OP Stack in an effort to democratize blockchain technology. BNB Chain Ethereum Virtual Machine opBNB represents a significant milestone in BNB Chain’s innovation with its ability to move transactions to a layer 2, alleviating congestion and reducing transaction costs. Leveraging fully optimized Optimistic Rollups, opBNB achieves enhanced scalability and affordability while maintaining a similar security level as L1. opBNB on BSC achieves a high transaction throughput by leveraging EVM execution optimizations that have been applied and verified on the BSC network. The underlying combination of opBNB innovation, which is composed of the optimization of the data accessibility, caching layer, and adjusting the submission process algorithm to allow simultaneous operations (also known as batcher) enables opBNB to reach a gas limit of up to 100M vs. 30M for . Optimism Based on these comprehensive optimizations, opBNB can support over 4,000 transfer transactions per second and an average transaction cost lower than 0.005 USD Arnaud Bauer, Senior Solution Architect at BNB Chain, was recently quoted as saying: "opBNB is a key driver of BNB Chain’s commitment to deliver a seamless and efficient experience for users, developers, and projects. By providing a low cost and high performance infrastructure that aims at mass adoption which provides more flexibility to applications. opBNB is based on the ethereum Op Stack, where we’ve heavily contributed to the L2 community. We invite the community and dApp builders to try the testnet and contribute to the future of Web3.” opBNB's robust and EVM-compatible platform enables developers to easily create open ecosystems, facilitating the migration of applications to BSC and expanding their user base. Projects can leverage improved throughput and significantly lower transaction costs, resulting in a superior user experience. Furthermore, opBNB's enhanced scalability overcomes challenges previously faced by projects with high transaction volumes on BSC and enables them to thrive. From enhanced scalability and EVM compatibility to low gas fees and improved end-user experience, the launch of opBNB marks an important step towards creating an accessible and cost-effective blockchain ecosystem. Developers and projects are invited to explore the the potential of opBNB, not only to benefit their project but also to enrich the broader BSC ecosystem and shape the future of blockchain technology. The Fundamentals of opBNB Testnet As a layer 2 solution, the primary objective of the opBNB is to significantly reduce congestion and transaction costs while enhancing its security.  To achieve this end goal, it is expected to have strong fundamentals. blockchain According to BNB Chain’s official press release: “Optimistic Rollups was proposed to reduce the computational load on the main chain by executing transactions off-chain and only posting transaction data on-chain as calldata. This approach drastically improves scalability by bundling multiple transactions together before submitting them to the main chain. By harnessing the power of Optimistic Rollups, opBNB moves computation and state storage off-chain, alleviating congestion and driving down transaction costs. Transactions are executed outside of the chain but their data is posted to the Mainnet as calldata. This revolutionary approach enables a high throughput environment with lower gas fees. Moreover, opBNB adopts a fraud-proving scheme to ensure the validity of transactions. Anyone can challenge the results of a rollup transaction by computing a fraud proof, and if successful, the transaction(s) will be re-executed, maintaining the network's integrity. The Benefits For Projects and Developers opBNB comes with certain benefits. As an EVM-compatible chain, it enables developers to create open ecosystems and seamlessly move their applications to the BNB smart chain(BSC)through the Optimism stack. It also incentivizes projects on the main chain that want a significantly reduced transaction cost and increased scalability to use its platform. Optimized security of opBNB means that off-chain transactions are validly recorded on the main chain as calldata. This introduces an extra layer of trust and reliability for its users, increasing the transparency and verifiability of transactions on the opBNB platform. testnet What You Need To Know About BNB Chain BNB Chain is a community-driven and decentralized blockchain powered by BNB. It consists of BNB Beacon Chain and BNB Smart Chain (BSC), which is EVM compatible and facilitates a multi-chain ecosystem. It is the world’s largest smart contract blockchain by daily active users. It has processed 3 billion transactions to date from 232 Million unique addresses making it the largest layer 1 blockchain globally and bringing developers massive user access with ultra-low gas fees and has experienced zero crashes since its inception. The ecosystem has more than 1,500 active dApps across multiple categories, such as DeFi, Metaverse, , NFT, and more. blockchain games Conclusion The launch of opBNB marks a new era in blockchain scalability as it is aimed at creating a scalable, accessible, low-cost, and transparent blockchain ecosystem.

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