Sui — High-Throughput Layer 1 Blockchain with Move Smart Contracts

Introduction

Sui is a Layer 1 proof-of-stake blockchain designed for low-latency, high-throughput applications. Built by Mysten Labs (founded by former Meta/Diem engineers), Sui uses the Move programming language with an object-centric model that allows transactions touching different objects to be processed in parallel without global consensus, enabling horizontal scaling.

What Sui Does

• Processes transactions in parallel when they operate on independent objects, removing sequential bottlenecks
• Uses the Move programming language with linear types to prevent asset duplication and reentrancy bugs
• Achieves sub-second finality for simple transactions through a fast-path consensus bypass
• Supports programmable transaction blocks that compose multiple operations atomically
• Provides zkLogin for account creation using OAuth credentials from Google, Facebook, and other providers

Architecture Overview

Sui separates owned-object transactions from shared-object transactions. Owned-object transactions use a Byzantine consistent broadcast protocol (Narwhal/Bullshark-derived) that skips full consensus, achieving finality in under a second. Shared-object transactions go through the Mysticeti consensus protocol. All objects are versioned and stored in an object store rather than a global state tree, enabling parallel execution across validators.

Self-Hosting & Configuration

• Run a full node by cloning the repository and building with cargo build --release --bin sui-node
• Configure the node with a fullnode.yaml specifying genesis, network, and storage paths
• Sync from an official snapshot for faster initial sync rather than replaying from genesis
• Set up archival storage with RocksDB or cloud-backed object stores
• Use sui-indexer to index on-chain data for querying via the JSON-RPC API

Key Features

• Object-centric data model enables true parallel transaction processing without sharding
• Move language with ownership and borrowing semantics prevents common smart contract vulnerabilities
• Programmable Transaction Blocks batch multiple operations into a single atomic transaction
• zkLogin enables gasless onboarding using existing web OAuth credentials
• Sponsored transactions allow applications to pay gas fees on behalf of users

Comparison with Similar Tools

• Aptos — also Move-based but uses account-centric model; Sui's object model enables more parallelism
• Solana — high-throughput via Sealevel parallel runtime; Sui uses object ownership for parallelism instead of declared accounts
• Ethereum — sequential EVM execution with global state; Sui processes independent transactions concurrently
• Avalanche — subnet architecture for scaling; Sui achieves throughput at the base layer without subnets
• Near — sharded blockchain with Nightshade; Sui avoids sharding complexity through its object model

FAQ

Q: What programming language are Sui smart contracts written in? A: Sui uses Move, a language originally developed at Meta for the Diem blockchain, with Sui-specific extensions for the object model.

Q: How fast is transaction finality on Sui? A: Simple transactions involving owned objects achieve finality in under one second. Shared-object transactions go through consensus and take slightly longer.

Q: What is a Programmable Transaction Block? A: A PTB lets you compose multiple Move calls, transfers, and splits into a single atomic transaction, reducing round trips and gas costs.

Q: Does Sui have a token? A: Yes, SUI is the native token used for gas fees, staking, and on-chain governance.

Sources

• https://github.com/MystenLabs/sui
• https://docs.sui.io/