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System Overview

Pylon enables synchronous composability between appchains and their settlement layer through coordinated sequencing. The system makes cross-chain operations appear atomic to developers while handling coordination behind the scenes.

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Core Components

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Sync Zones

A sync zone is a group of appchains that can interact atomically. All chains in a sync zone share the same coordinator and settlement layer.

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Coordinator

The coordinator is a Pylon node that:
  • Monitors all appchains and settlement layer for cross-chain calls
  • Forwards calls to target chains
  • Injects results back via priming transactions
  • Ensures atomic execution across the sync zone

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Port Contracts

Port contracts are smart contracts that store cross-chain call results. They serve as the interface for accessing settlement layer data from appchains.

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Priming Transactions

Priming transactions are system transactions that pre-populate Port Contracts with cross-chain call results before user transactions execute.

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Forwarding Proxy Contracts

Forwarding proxy contracts provide a developer-friendly abstraction that routes calls to Port Contracts, allowing developers to use standard contract interfaces for cross-chain interactions.

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Transaction Flow

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Key Benefits

  • Atomic execution - Cross-chain operations succeed or fail together
  • No async handling - Developers write synchronous code
  • Familiar interfaces - Use standard contract patterns
  • Real-time data - Always access current settlement layer state

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Next Steps