CCIP Architecture - Overview (TON)

CCIP is a cross-chain messaging protocol built on Chainlink and secured by its decentralized oracle networks (DONs). On TON, CCIP provides the following capability:

• Data Transmission: Send arbitrary data (i.e., bytes) to a receiving contract.

High-level Architecture

CCIP delivers cross-chain messages from a source chain to a destination chain by combining offchain consensus and onchain execution components. The architecture is composed of two primary layers:

1. Offchain Architecture

   • Decentralized Oracle Network (DON) with nodes that perform distinct roles:
     • Commit: Observes and validates source-chain events to build a consensus-based report.
     • Execution: Validates pending messages and optimizes them for execution on the destination chain.

2. Onchain Architecture

   • Router:
     • Each blockchain has a single immutable Router contract that serves as the unified interface for users and decentralized applications (dApps).
   • On the source blockchain, onramp functionality consists of:
     • Providing fee estimates.
     • Dispatching the message data.
   • On the destination blockchain, offramping functionality consists of:
     • Accepting and verifying commit reports from the Committing DON.
     • Routing the processed message to the designated receiver.

Note: These high-level descriptions outline the core principles of CCIP. The detailed onchain and offchain architectures for TON can be found in the relevant documentation.