BNB Chain Plans High-Speed Layer 1 for Trading

BNB Chain is building a new Layer 1 blockchain optimized for agentic trading. The project's technical roadmap sets targets of sub-50-millisecond transaction preconfirmation and sub-one-second block finality. A public testnet is planned by the end of 2026 and a public mainnet in early 2027.

The chain will run alongside existing BNB Chain layers and aims to deliver an execution experience close to centralized exchanges while keeping assets in users' self-custody. The design targets throughput above 100,000 transactions per second through co-optimized consensus, parallel execution, and LtHash-based state storage.

To reduce latency and limit common on-chain front-running, the design removes a public mempool and introduces TxStream, which routes transactions directly to the block leader for immediate ordering. A reserved PriorityLane would allocate block space for time-sensitive operations such as oracles, liquidations and bridge messages, with access controlled by on-chain governance.

Leader roles will rotate every 200 milliseconds. The roadmap states this rotation speed, along with sub-50-millisecond ordering commitments and publicly auditable ordering, is intended to limit any single validator's chance to extract value or censor transactions.

Developers identify the execution layer as the main area for performance gains. They plan low-level optimizations such as just-in-time compilation and strength reduction applied to the blockchain virtual machine to reduce repeated work in popular contracts.

On cryptographic security, the project is testing a hybrid approach that layers post-quantum protections over existing signature schemes rather than replacing them immediately. The team selected a lattice-based LtHash state commitment to protect state integrity against future quantum threats and is researching account abstraction to allow users to change authentication methods without changing wallet addresses.

The roadmap includes an official native bridge to move tokens between the new chain and existing BNB Smart Chain infrastructure. BSC is planned to serve as a settlement hub and BNB as the unified asset across chains. The new chain will be the fourth layer in the BNB Chain stack, joining BNB Smart Chain, opBNB and Greenfield.

David Z, BNB Chain's chief technology officer, framed the performance target by contrasting on-chain timing with co-located high-frequency trading: ‘For co-located HFT, a CEX still wins today. For everyone else, this is the CEX experience without the custodial risk.' He also noted that no complete industry-wide quantum migration scheme exists and that exposed public keys remain vulnerable to future decryption.

The roadmap also records recent H1 improvements on BNB Smart Chain, including block intervals shortened to 450 milliseconds and benchmark throughput approaching about 5,200 transactions per second. Other projects are pursuing parallel execution and throughput gains, reflecting broader industry work on execution-layer bottlenecks.