OpBNB is a layer 2 scaling solution for BNB Smart Chain (BSC) that aims to provide fast, cheap, and secure transactions for decentralized applications. OpBNB uses a technique called optimistic rollups, which bundle transactions together and submit them to the BSC mainnet as a single transaction. This reduces the gas fees and congestion on the mainnet, while preserving the security and decentralization of BSC.

OpBNB was developed using the OP Stack, which is a modular optimistic rollup framework that can be used to develop scaling solutions for different blockchain networks. The OP Stack is a set of pre-developed components, just like a SD Kit which can be used by teams looking to build a rollup solution1.

The OP Stack consists of three main components:

OVM: The Optimistic Virtual Machine (OVM) is a fully compatible EVM execution environment that supports all existing BSC tooling and infrastructure. The OVM enables fast and cheap transactions on L2s by using optimistic rollups, a technique that bundles transactions together and submits them to the BSC mainnet as a single transaction. The OVM also uses fraud proofs to ensure that any invalid transaction can be challenged and reverted on the mainnet2.

OP Bridge: The OP Bridge is a standardized protocol for transferring assets and messages between different chains and L2s. The OP Bridge allows users and developers to access any chain or L2 from OpBNB or any other OP Stack-based network, without having to worry about the underlying technical details. The OP Bridge also enables new possibilities for innovation and experimentation, such as cross-chain composability, atomic swaps, meta-transactions, and more2.

OP Governance: The OP Governance is a shared governance layer for all OP Stack-based networks. The OP Governance allows stakeholders to participate in the decision-making process of the OP Stack codebase and the Superchain network. The Superchain is a unified network of chains that share security, communication, and governance using the OP Stack. The Superchain includes OpBNB, Optimism, opETH, opDOT, and more2.

Some of the benefits of OpBNB are:

High performance: OpBNB can achieve a remarkable capacity of 100M gas per second, thanks to its extensive research and optimization work for the BSC client, covering various aspects such as storage, execution and security. OpBNB also leverages BNB greenfield as a data availability layer, which reduces the cost of posting data to the mainnet3.

Low cost: OpBNB can provide a truly low cost layer 2 solution for BSC users and developers. OpBNB can reduce the gas fees by up to 100x compared to the mainnet, making it affordable for various use cases such as DeFi, NFTs, gaming, etc3.

Ethereum compatibility: OpBNB fully supports OVM server, making projects work like they are on Layer-1 Ethereum. This means that any smart contract or application that works on Ethereum or BSC can also work on OpBNB without any changes. OpBNB also supports native integration with BNB ecosystem3.

Open ecosystem: OpBNB fosters an open and collaborative ecosystem where different projects can work together and benefit from each other. By using OP Stack, OpBNB can join a network of chains that share the same tech stack and interoperate with each other. For example, OpBNB can connect with Optimism, which is another layer 2 platform based on OP Stack that supports EVM and Solidity. By being part of this ecosystem, OpBNB can increase its network effects, security and innovation3.

OpBNB is one of the most promising and ambitious projects in the blockchain space. It is not only scaling BSC, but also transforming it into a superchain that connects different chains and L2s in a harmonious way. OpBNB is also creating a new model of sustainable ecosystem funding that rewards public goods creation and fosters collaboration.