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Spire 🔷
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New post ✍️ ✍️ : How shared settlement + coordinated sequencing unlocks synchronous composability for appchains https://paragraph.xyz/@spire/l3-based-stack
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Spire 🔷
@spire
Spire is building the Based Stack to help apps launch their own based rollup L2. As ecosystems evolve, a new frontier is emerging - based L3s. This post explores how Spire’s approach can enable rollups to sync execution beyond L2s. 🧵
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Spire 🔷
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The problem: rollup fragmentation creates liquidity islands. Each appchain operates with its own sequencer and settlement layer, leading to: 🚧 Capital inefficiency ⏳ Delayed execution 🔄 Fragmented price discovery ❌ Cross-domain execution risk
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Spire 🔷
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Spire introduces (1) Shared Settlement + (2) Coordinated Sequencing — a new execution model that enables synchronous composability across rollups. Instead of isolated appchains, Spire enables L3s to execute in a single sequencer batch.
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Spire 🔷
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(1) Shared Settlement: • Appchains submit tx bundles to a shared sequencer instead of settling in isolation. • Transactions execute atomically within a batch — either all succeed or all revert. • Optimistic atomicity allows preconfirmations before final L2 settlement.
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Spire 🔷
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(2) Coordinated Sequencing: • Tx ordering is dynamically optimized for cost, latency, and execution guarantees. • Apps define custom priority rules for execution fees & failure handling. • Sequencer marketplaces let devs pick optimal execution models (MEV-aware, low-latency, etc.).
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