Katana | Agglayer & CDK-opgeth Tech Stack Explained
Understand Katana’s CDK-opgeth execution stack, Geth compatibility, zero-knowledge proof settlement, Agglayer interoperability and Ethereum security model.
Execution architecture
Katana uses a CDK-opgeth stack: an OP Stack-style environment built around Geth with zero-knowledge proof infrastructure. Developers get an EVM-compatible execution model while Katana settles state transitions through proof systems connected to Ethereum.
Why Geth matters
Geth is the most widely used Ethereum execution client. Building around a Geth-based execution environment improves compatibility with existing EVM tooling, RPC libraries, wallets and smart-contract development workflows.
Zero-knowledge settlement
Transactions execute on Katana, while proof infrastructure validates the resulting state transitions. The goal is to provide Ethereum settlement assurance without requiring every transaction to execute directly on Ethereum L1.
Agglayer connectivity
Agglayer provides an interoperability layer for connected chains and assets. Katana participates through canonical bridge infrastructure and shared proof/interoperability mechanisms, allowing applications to reason about cross-chain flows without treating every bridge as an unrelated system.
Developer implications
Developers can generally use Solidity, viem, wagmi, standard JSON-RPC and EVM tooling. Katana-specific integration work includes network parameters, bridge contracts, productive token addresses, predeploy differences, DeFi market contracts and the network’s specific WETH implementation.
Operational considerations
Even with familiar EVM semantics, developers should verify RPC rate limits, chain IDs, contract addresses, token decimals and bridge paths before production deployment. Never assume generic OP Stack defaults are correct for productive assets or network-specific contracts.
Frequently Asked Questions
What execution client does Katana use?
Katana uses a Geth-based CDK-opgeth execution stack.
Is Katana EVM compatible?
Yes. Developers can use familiar EVM smart-contract and RPC tooling.
How does Katana connect to Ethereum?
Katana uses zero-knowledge proof and Agglayer-related infrastructure for settlement and interoperability.
Can I use default OP Stack token addresses?
Not always. Developers should use Katana-specific technical references for productive assets and bridge integrations.