# Protocol Overview

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Developers utilise Ditto **TypeScript SDK** to define **deferred, multi-chain workflows, create** [**ZeroDev Smart Sessions**](https://zerodev.app/) and register them on-chain. **Ditto Runner Nodes** watch multiple chains for registration events, pull **workflow metadata from IPFS**, keep a live schedule of active workflows, and **process/simulate** them at the right time. Each runner **reports to the Performer**, which aggregates results. Runner attestations are used to reach **consensus on settlement**. Final, agreed outcomes are executed through the **Account Abstraction (AA) layer** (ERC-7579 modules), producing on-chain settlements and receipts back to the dApp. You can learn more about our SDK [here](https://github.com/dittonetwork/ditto-workflow-sdk).