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Glossary

Atomicity​

The property that ensures all parts of a cross-rollup transaction either succeed completely or fail completely, preventing partial execution.

Mailbox Contracts​

Smart contracts that enable cross-rollup message passing through simple read/write interfaces for dApp communication.

Composability​

The ability to combine different dApps and protocols across multiple rollups to create complex, interconnected workflows.

Shared Publisher​

A coordination layer that manages cross-rollup transactions and ensures atomic execution using two-phase commit protocols.

Two-Phase Commit (2PC)​

A distributed consensus protocol that coordinates atomic execution across multiple rollups by collecting votes before committing transactions.

Cross-Rollup Transactions​

Transactions that span multiple rollups and execute atomically, enabling complex workflows across different chains.

SuperchainERC20​

A token standard that enables seamless asset bridging across OP Stack chains with unified liquidity and fungibility.

Compose Bridge​

The infrastructure component that handles asset transfers between rollups while maintaining atomicity guarantees.

Rollup​

A Layer 2 scaling solution that processes transactions off-chain and submits proofs to the main chain.

ZK Proofs​

Zero-knowledge proofs used for verifying transaction validity without revealing transaction details.

Liquidity Fragmentation​

The problem of having separate, isolated liquidity pools on different chains instead of unified pools.

Unified TVL​

Total Value Locked that is consolidated across multiple rollups rather than fragmented on individual chains.