> ## Documentation Index
> Fetch the complete documentation index at: https://companyname-a7d5b98e-ton-overview-fixes.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

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This section introduces the core concepts of the TON Blockchain. It explains the fundamental building blocks of the system, including data structures, transaction flow, consensus mechanisms, and network protocols.

<Aside>
  The material here provides the foundation for developers, researchers, and anyone who wants to understand low-level TON’s architecture.
</Aside>

## Core Data Structures & Addressing

* **[Cells](/ton/cells)** – TON’s fundamental data structure used to represent every piece of information on-chain, from account states to transactions.
* **[Addresses](/ton/addresses)** –  Addresses are unique identifiers for smart contracts (including wallets). Every entity on TON is a smart contract with its own address.
* **[Account Statuses](/ton/statuses)** – The four possible states of an account in TON and how these states control contract execution.

## Transaction Processing

* **[Messages and Transactions](/ton/transaction)** – TON is message-driven: all interactions between accounts are handled through internal and external messages, which form transactions.
* **[Execution Phases and Fees](/ton/phases-and-fees)** – How TON processes a transaction through the Storage, Credit, Compute, Action, and Bounce phases, while applying fees at each step.
* **[Precompiled Contracts](/ton/precompiled)** – A feature of TON that heavily optimizes gas usage for frequently invoked contracts.

## Network Architecture

* **[Blockchain Sharding](/ton/shards)** – TON’s horizontal scaling model, where every workchain is divided into multiple shardchains that can process transactions in parallel.
* **[Blockchain Configuration](/ton/config)** – Dynamically updated configuration of the blockchain∆ that is a native TON account.
* **[Network Protocols](/ton/network)** – TON’s communication stack, including ADNL for peer discovery, RLDP for reliable data transfer, and DHT for distributed lookups.
* **[Blocks](/ton/)** – The structure of TON blocks, which record transactions, state updates, and references that connect shardchains across the TON Blockchain.

## Validation & Security

* **[Proofs](/ton/proofs)** – Applicability of Merkle proofs, natively supported by TON Blockchain.
* **[Consensus](/ton/consensus)** – TON’s Catchain consensus protocol, a Byzantine Fault Tolerant algorithm that ensures validators reach agreement on blocks in the presence of faulty or malicious participants.

## Technical Whitepapers

* **[TON Blockchain](/ton/tblkch)** – Describes the core architecture of the TON Blockchain.
* **[TVM Whitepaper](/ton/tvm)** – Defines the TON Virtual Machine (TVM), the computation engine that executes smart contracts within TON blockchain.
* **[The Open Network](/ton/ton)** – Outlines the overall design and components of the TON ecosystem,
* **[Catchain Consensus](/ton/catchain)** – Explains TON’s Byzantine fault-tolerant consensus protocol used by TON blockchain for block creation.

## Reference Materials

* **[Glossary](/ton/glossary)** – A reference guide to important TON-specific terms and definitions.