World Chain First Production L2 to Stream Block Access Lists via Flashblocks

World Chain has become the first production Layer 2 blockchain to stream full Block Access Lists via Flashblocks. The feature will be rolled out on mainnet on August 17, according to an announcement made by World Chain on Wednesday.

This upgrade enables validators to verify blocks in parallel while they are still being built, targeting a throughput of up to one gigagas per second without requiring more powerful hardware. Traditionally, validators must re-execute every transaction in a block sequentially before confirming its validity.

The use of Block Access Lists (BALs) is part of the Ethereum Improvement Proposal EIP-7928. This proposal aims to add BALs as an enforced, block-level record of all accounts and storage slots accessed during a block's execution, along with post-execution state differences. In the end, this will lead to faster block validation.

World Chain plans to take BALs a step further by streaming this block builder data incrementally every 200 milliseconds through its flashblock architecture. This is made possible by Flashblocks, developed by Flashbots as an extension of their Rollup Boost technology for OP Stack chains. Validators will begin verifying transactions immediately as the block is assembled, reducing validation latency and spreading verification work throughout the block-building process.

According to World's test network benchmarks, 'validation latency remained effectively stable' even as blockchain throughput increased. The results suggest that blockchain networks can increase throughput substantially without proportionally increasing the computing resources required to independently verify the chain.