BNB Chain is building a new Layer 1 blockchain designed for agentic trading with target specifications of sub-50-millisecond transaction preconfirmation and sub-one-second finality. A testnet is planned for the end of 2026, with mainnet deployment targeted for early 2027, according to the project's H2 technical roadmap. The new chain addresses the need for faster execution in automated strategies and onchain trading systems as crypto trading infrastructure moves toward a more automated market structure where agents, liquidators, and market makers compete for speed and execution quality.
BNB Chain Targets Sub-50-Millisecond Preconfirmation for New Layer 1
The new chain will run alongside BNB Smart Chain, opBNB, and Greenfield rather than replace them. The design goal is to bring the onchain trading experience closer to centralized exchange execution while keeping self-custody and transparent settlement.
The chain targets sub-50-millisecond transaction preconfirmation, sub-one-second finality, and throughput above 100,000 transactions per second through co-optimized consensus, parallel execution, and LtHash-based storage. Those figures remain design targets because the network has not yet reached testnet.
David Z, BNB Chain's chief technology officer, said sub-50-millisecond preconfirmation puts the chain near the speed a typical exchange user actually feels, while still allowing users to custody their own assets instead of relying on balances inside a company database. "For co-located HFT, a CEX still wins today. For everyone else, this is the CEX experience without the custodial risk," Z said.
TxStream Removes Public Mempool to Reduce Front-Running Risk
The proposed architecture removes the public mempool through a feature called TxStream. Instead of broadcasting pending transactions into a public waiting area, transactions are routed directly to the block leader. The goal is to reduce latency and make common forms of front-running, including sandwich attacks, harder to execute.
With no public mempool, attackers have less opportunity to see a pending trade and place transactions around it before execution. Ordering is committed before the trade becomes visible.
BNB Chain's approach includes leader rotation. Z said leaders rotate every 200 milliseconds, making it difficult for any validator to build a durable business around privileged ordering. Sub-50-millisecond commitments are also intended to make ordering behavior auditable and raise the cost of misconduct for validators whose stake and reputation are exposed. "TxStream doesn't eliminate MEV. Nothing does. It makes the dominant attacks impractical by design," Z said.
A second component, PriorityLane, would reserve block space for oracles, liquidations, and bridges, with the reserve governed onchain. That could help protect time-sensitive functions that are important for DeFi market stability, especially during volatility when delayed oracle updates or liquidation transactions can increase protocol risk.
Execution Layer Optimization Through Just-in-Time Compilation
BNB Chain's technical roadmap places the main bottleneck in the execution layer, not only in consensus or storage. The team argues that EVM chains repeat too much work because popular contracts, such as token transfers and decentralized exchange swaps, are executed millions of times.
"EVM chains do a huge amount of repeated work because the same popular contracts (a DEX swap, a token transfer) run millions of times," Z said.
The project is focusing on just-in-time compilation and strength reduction, techniques used in mainstream software engineering, to reduce repeated computational work. The approach is less visible than launching a new consensus design, but it targets a practical issue for high-volume trading chains: faster execution without requiring every application to migrate away from familiar EVM patterns.
New Chain Joins BNB Smart Chain, opBNB, and Greenfield
The new Layer 1 would become the fourth major chain in the BNB ecosystem, joining BNB Smart Chain, opBNB, and Greenfield. BNB Chain is presenting the expansion as developer flexibility rather than a forced migration away from BSC.
Z said the new chain will include an official native bridge to BSC, with BSC serving as the settlement hub and BNB remaining the shared asset across every chain. "The goal is growing the total BNB Chain pie, not re-slicing it," Z said.
Quantum-Resistant Security in Testing Phase
The roadmap also includes work on quantum-resistant security. BNB Chain is testing a hybrid approach that layers post-quantum protection over existing cryptography rather than replacing it outright. Developers are also studying whether account abstraction can let users adopt quantum-safe protection without changing wallet addresses.
"Nobody in the industry has a complete quantum migration scheme yet, including us," Z said.
The team has already made post-quantum choices in areas it controls, including a lattice-based LtHash state commitment. Account migration remains harder because keeping wallet addresses stable while changing signature schemes requires binding an address to an upgradeable authentication policy rather than a single key.
FAQ
What is BNB Chain building for agentic trading?
BNB Chain is building a new Layer 1 blockchain designed for agentic trading with target specifications of sub-50-millisecond transaction preconfirmation, sub-one-second finality, and throughput above 100,000 transactions per second. A testnet is planned for the end of 2026, with mainnet deployment targeted for early 2027.
How does TxStream reduce front-running risk?
TxStream removes the public mempool by routing transactions directly to the block leader instead of broadcasting them into a public waiting area. Leaders rotate every 200 milliseconds, making it difficult for validators to build a business around privileged ordering. This design makes common forms of front-running, including sandwich attacks, harder to execute.
