Shared Sequencing

Shared sequencing is infrastructure that provides transaction ordering services across multiple blockchain networks, enabling coordinated execution and atomic settlement of transactions that span multiple chains. Rather than each blockchain independently ordering its transactions, a shared sequencer aggregates transactions from multiple networks and determines their canonical order. This approach reduces latency, improves capital efficiency by eliminating the need to lock assets across chains, and enables true composability between blockchains. Shared sequencers can be operated by a single entity, a committee, or a decentralized network, depending on the system's architecture and security model. Example: Astroport's cross-chain sequencing infrastructure and protocols like Arbitrum's Orbit chains can utilize shared sequencers to coordinate transaction ordering across multiple Layer 2 networks, ensuring that cross-chain swaps and liquidity transfers execute in the correct order without requiring separate consensus rounds on each chain. Why it matters for cross-chain interoperability: Shared sequencing eliminates ordering ambiguity between chains, enabling atomic cross-chain transactions and reducing latency and costs. This is fundamental for seamless multi-chain applications and efficient capital deployment across blockchain networks.

Category: cross chain, infrastructure applications

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