> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tac.build/llms.txt
> Use this file to discover all available pages before exploring further.

# Architecture

> How TAC's three-layer architecture enables seamless interaction between TON and EVM ecosystems

TAC's architecture is designed to support secure and deterministic cross-chain communication while preserving native user experience on the TON side. The protocol relies on on-chain consensus to execute contract-level operations across both networks.

<Frame caption="TAC's three-layer architecture connecting TON users with EVM applications">
  <img src="https://mintcdn.com/tac-92ab2768/ptPkl7REL-06PTYm/images/architecture-2.png?fit=max&auto=format&n=ptPkl7REL-06PTYm&q=85&s=66f5c77bd7de83e27b69005ba0f213ec" alt="TAC Architecture showing EVM Layer, TON Adapter, and Proxy Apps" width="2000" height="2000" data-path="images/architecture-2.png" />
</Frame>

## Main Layers

<Columns cols={3}>
  <Card title="TON TVM Layer" icon="hammer" href="/why-tac/components/tac-sdk">
    TAC SDK dev tools to prepare and initiate cross-chain transaction in TON
  </Card>

  <Card title="TON Adapter" icon="arrow-left-right" href="/why-tac/components/ton-adapter">
    Distributed sequencer network that securely routes messages between TON and EVM.
  </Card>

  <Card title="TAC EVM Layer" icon="blocks" href="/why-tac/components/tac-evm-layer"> Full EVM compatibility with Cosmos SDK. Handles all application logic and state. </Card>
</Columns>

## Secondary Layers

<Columns cols={2}>
  <Card title="Hybrid dApps" icon="gamepad" href="/why-tac/components/hybrid-dapps">
    Applications that combine EVM smart contract logic with native Telegram user experience
  </Card>

  <Card title="TAC Proxies" icon="git-commit-horizontal" href="/why-tac/components/proxy-contracts">
    Interface layer to access your EVM dApp from TON
  </Card>
</Columns>