Exploring opBNB: BNB Chain’s Groundbreaking Layer 2 Innovation

Exploring opBNB: BNB Chain’s Groundbreaking Layer 2 Innovation

What is opBNB?

opBNB relies on OP Stack’s bedrock technology, enhancing node performance and ensuring EVM compatibility. Its goal is to enrich the Binance ecosystem by enhancing the BNB Smart Chain’s overall performance and user experience.

The opBNB network acts as the Layer 2 scaling solution for the BNB Smart Chain, powered by Optimism OP Stack’s foundational version. It offloads transaction processing and resource usage from the BNB Smart Chain while preserving data integrity on the mainnet. Users can seamlessly interact with the opBNB network by depositing funds from BSC and utilizing various applications and contracts.

How Does opBNB Work?

OpBNB operates through a meticulous process:

  1. Transaction Submission: Users initiate transactions sent to an Optimistic Rollups contract on the BNB Smart Chain.
  2. Transaction Pooling: The Optimistic Rollup contract consolidates transactions into a single unit.
  3. Main Chain Validation: The consolidated transaction is transmitted to the main chain for validation.
  4. Blockchain Commitment: The main chain validates and commits the transaction to the blockchain ledger.
  5. Contract Status Update: Following validation and commitment, the Optimistic Rollups contract updates its status, ensuring transparency.



At opBNB’s core lies the Sequencer, transforming diverse transactions into a coherent format and transmitting them to the Roll-Up Contract for processing.

Prover (Node)

The Prover constructs evidence to verify state transitions, ensuring transaction integrity and preventing third-party intrusion.

Verifier (Challenger)

The Verifier rigorously assesses the evidence provided by the Prover, ensuring transactions adhere to network standards.


  • High interoperability: opBNB communicates with other Layer 2 integrated OP Stack platforms.
  • Quick transactions: opBNB promises increased network speed to 4,500 TPS.
  • EVM compatible: Developers can create dApps with ease on the opBNB ecosystem.
  • Low transaction costs: opBNB charges minimal transaction fees, enhancing user affordability.
  • Security: opBNB employs sequencers, provers, and verifiers, ensuring safe state transitions and transactions.
  • Flexibility: OP Stack’s foundation offers a modular and interchangeable execution architecture.
  • Interoperability: Built on OP Stack, opBNB interacts with other Layer 2 platforms like Optimism.


opBNB Bridge

Users can transfer assets between BNB Chain testnet and opBNB via the opBNB Bridge.


opBNBScan allows users to inspect on-chain data, including block number, transaction history, and Txn hash.


opBNB’s roadmap includes:

Q2, 2023

  • Launch testnet
  • Integration with dApps
  • Marketing and outreach campaigns

Q3, 2023

  • Launch mainnet
  • Increased dApps and user adoption
  • Expansion to other blockchains

Q4 2023 and beyond

  • Continuous development and improvement
  • Expansion into new markets
  • General user acceptance


opBNB is developed and maintained by Binance employees, showcasing their commitment to the project’s future.


opBNB, built on BNB Smart Chain’s security, offers a secure solution for dApps, ensuring fast throughput, reasonable rates, and EVM compatibility. While its widespread adoption is underway, opBNB’s potential to reshape the Binance ecosystem is undeniable.