Key features

Stable’s headline specs (single-slot finality, USDT0 as gas, full EVM compatibility) and the USDT-specific features built on top.

Stable is a delegated Proof-of-Stake Layer 1 with single-slot finality, full EVM compatibility, and USDT0 as the native gas token. The features below are the ones that shape day-to-day integration. Each links to the page that covers it in depth.

Protocol-level features

Feature	What it means
Single-slot finality	A transaction is final once it’s in a block. No multi-block confirmation wait.
Full EVM compatibility	Solidity, Vyper, Foundry, Hardhat, ethers, viem, and eth_* RPC methods work unchanged.
USDT0 as gas	One asset serves as both native balance and ERC-20. No separate gas token to hold.
Cross-chain bridging	USDT0 moves onto Stable from Ethereum, Arbitrum, HyperEVM, Tron, and other chains via LayerZero OFT.

USDT-specific features

USDT as gas

USDT0 serves as both the native gas token and an ERC-20 token on the same balance.

Gas waiver

Governance-authorized waivers submit wrapper transactions that execute at zero gas price on the user’s behalf.

Guaranteed blockspace

Enterprise partners secure reserved capacity in every block for payment flows.

USDT transfer aggregator

High-volume USDT0 transfers batch into parallelized, fault-tolerant settlement bundles.

Confidential transfer

Zero-knowledge cryptography shields transfer amounts while keeping parties auditable.

For which upgrades are live today and which are on the roadmap, see Roadmap.

Next recommended

Ethereum comparison

Identify what stays the same and what changes when you port from Ethereum to Stable.

Flow of funds

Trace USDT from on-ramp through on-chain transfer to off-ramp settlement.

Architecture overview

Walk through the consensus, execution, database, and RPC layers that deliver these features.