# CCIP Onchain Architecture (Aptos)
Source: https://docs.chain.link/ccip/concepts/architecture/onchain/aptos
Last Updated: 2025-09-03


Chainlink CCIP's Aptos onchain architecture consists of specialized Move modules deployed on both source and destination chains. These modules work together with CCIP's offchain infrastructure to provide end-to-end cross-chain interoperability.

- **[Overview](/ccip/concepts/architecture/onchain/aptos/overview)**: Provides a high-level introduction to CCIP's Aptos-based onchain architecture, including a component diagram, key roles, and a detailed walk-through of a message's lifecycle from source to destination chain.

- **[Components](/ccip/concepts/architecture/onchain/aptos/components)**: Describes each architectural component in detail.

- **[Upgradability](/ccip/concepts/architecture/onchain/aptos/upgradability)**: Explains CCIP's approach to secure system evolution.