Kroma

What is Kroma?

Kroma is a next-generation Ethereum Layer‑2 rollup built on the Optimism Bedrock stack and enhanced with both Optimistic and Zero-Knowledge technology. Launched in 2024 by Offchain Labs, Kroma currently operates as an Optimistic Rollup with integrated zk-fault proofs. It runs a zkEVM compatible with the Scroll ecosystem with the goal of transitioning to a full ZK Rollup once proof generation becomes fast and affordable .

Optimism Bedrock provides modularity, security, and upgradeability. Kroma adds zk-proof fallbacks to detect fraud faster, reducing verification delays. With Scroll’s zkEVM integration, Kroma supports Ethereum-native tooling—like Hardhat, Truffle, and Metamask—making migration transparent for developers . Future-proofing includes a path to full Prover decentralization and low-cost finality via zk rollup compression.

Key Features

• Hybrid L2 Execution: Optimistic transaction model with zk-proof challenge.
• zkEVM Compatibility: Runs Scroll‑based Ethereum bytecode validation.
• Modular Rollup: Leveraging Bedrock’s modularity for upgrades and modular ecosystem growth.
• Security Enhancements: zk-fault proofs add an extra layer of fraud deterrence.
• Transition Roadmap: Onboarding zk prover benchmarks before shifting fully to ZK Rollup.

Enterprise Use Cases

• Scalable Smart Contract Deployments: Massive TPS with Ethereum toolchain compatibility.
• Cost-Efficient Token Operations: Lower gas for treasury and ERP-driven token flows.
• Automated Compliance: Rollup batch proofs allow for audit trails and immutable reporting.
• API-Driven Token Accounting: Integrate token mint/burn/transfer data into accounting pipelines.
• Future-Ready Architecture: Seamless upgrade path to full ZK tech as rollup adoption grows.

By integrating with Cryptoworth’s crypto accounting software, Kroma-generated transactions—rollup batches, proof settlements, and ERC‑20 flows—are captured within ledger entries. This supports cost-basis tracking, unrealized gain reconciliation, and proof-validated accounting for treasury operations on Layer‑2.