> For the complete documentation index, see [llms.txt](https://openledger.gitbook.io/openledger/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://openledger.gitbook.io/openledger/openledger-ecosystem/test-network-overview/block-production-and-execution.md).

# Block Production and Execution

OpenLedger uses an Optimistic Rollup model, leveraging the OP Stack for high scalability while maintaining the security of the parent blockchain (Ethereum). This approach processes transactions off-chain and submits them to L1 for finality, reducing gas costs and increasing transaction throughput.

### Block Production

• Managed by a single sequencer that constructs and executes L2 blocks.

• Blocks are produced every 2 seconds, ensuring high throughput.

• L2 transactions are written to EigenDA and then referenced on Ethereum for verifiable access.

### Block Execution

• The execution engine processes transactions using a peer-to-peer network.

• L2 blocks are derived from L1, ensuring censorship-resistant operations.