# Sui Architecture

*[Documentation index](/llms.txt) · [Full index](/llms-full.txt)*

Sui is a layer 1 blockchain built on a delegated proof-of-stake consensus model. Learn about the core components that make up Sui, including the object model, transaction processing, consensus mechanisms, network environments, and tokenomics.

- [Checkpoint Verification](checkpoint-verification) — On the Sui network, checkpoints define the history of the blockchain. Checkpoint verification is how full nodes and other clients guarantee their state is exactly the same as the Sui network.
- [Components](components) — Sui is a layer 1 blockchain that performs its own consensus and validation of transaction blocks. Sui is comprised of the blockchain itself, the blockchain's activity such as transactions, and the validator entities that verify this activity.
- [Consensus](consensus) — Overview of the Sui consensus mechanism.
- [Epochs and Reconfiguration](epochs) — Epochs define time periods on Sui where the validator set remains unchanged. Reconfiguration adjusts network parameters at epoch boundaries.
- [Images](images/)
- [Networks](networks) — Sui operates multiple networks including Mainnet for production, Testnet for staging, Devnet for developing new features, and Localnet for local development.
- [Object Model](object-model) — Everything on the Sui blockchain is an object that has metadata, a type of ownership, and a referencing scheme.
- [Protocol Upgrades](protocol-upgrades) — The Sui protocol, framework, and execution engine are frequently extended to include new functionality and bug fixes. The upgrade process ensures all clients use the same source.
- [Security](sui-security) — Assets on Sui, including coins and tokens, are types of objects, and can only be used by their owners unless otherwise defined according to predefined logic in a smart contract.
- [Storage](sui-storage) — Historical data and storage pricing provide insights into the cost of operations on the Sui network.
- [Tokenomics on Sui](tokenomics-overview) — Sui's tokenomics is designed to support the long-term financial needs of Web3. It uses the native SUI token as the currency of the network and to pay for the network's gas fees.