What is Stable?

Stable is defined as the first Stablechain, a Layer 1 blockchain where stablecoins are natively used for gas and settlement. It offers gasless USDT0 transfers, high-volume USDT transactions, and efficient USDT issuance/settlement. Stable operates with sub-second block finality, high transaction capacity (thousands of TPS), and Ethereum Virtual Machine (EVM) compatibility.

The StableBFT consensus protocol initially uses a CometBFT-based Proof-of-Stake (PoS) mechanism and plans to transition to a DAG-based Autobahn consensus in the future. Features like Stable Wallet and Stable Name provide a user-friendly experience, simplifying onboarding with social login and human-readable addresses. Stable is an optimized, USDT-focused blockchain infrastructure for both individual users and enterprises.

Purpose of Stable

As digital finance accelerates, stablecoins like USDT are becoming central to on-chain activities. However, existing blockchain infrastructures are not optimized for stablecoin-based operations, leading to issues such as high fees, unpredictable costs, complex user experiences, and enterprise limitations. Stable addresses these challenges by providing a USDT-specific blockchain. It meets demands for low costs, high speed, and reliability, offering gasless transfers for individual users, guaranteed blockspace for enterprises, and EVM-compatible tools for developers. Targeting USDT’s $150 billion market cap and over 350 million users, Stable aims to mainstream stablecoin usage in cross-border payments, daily transactions, and financial services. Stable enhances financial inclusion and expands the real-world applications of stablecoins by enabling global-scale USDT movement.

How Does It Work?

Stable is a Layer 1 blockchain optimized for USDT transactions. Its technical infrastructure consists of the following components:

• StableBFT: Initially, a customized CometBFT-based PoS consensus provides high throughput, low latency, and tolerance to 1/3 validator failures. In the future, a transition to Autobahn (PBFT-on-DAG) consensus aims for 5x faster consensus and 200,000+ TPS.

• Stable EVM: An Ethereum-compatible execution layer that works with tools like MetaMask and Etherscan. Precompiles bridging with StableSDK allow smart contracts to securely access core chain logic.

• StableDB: Addresses disk I/O bottlenecks by separating state commitment and storage with MemDB and VersionDB, offering fast memory-based access via mmap.

• High-Performance RPC: Replaces monolithic RPC with lightweight nodes separating read/write operations, targeting 10,000+ RPS and <100ms latency.

• USDT0: Compliant with LayerZero’s Omnichain Fungible Token (OFT) standard, enabling bridge-less cross-chain USDT transfers. Locked/burned on the source chain and minted on the destination.

• gasUSDT: Native gas token, automatically converted from USDT0, allowing users to hold only USDT0 (via Account Abstraction).

• Stable Wallet & Stable Name: Simplifies user experience with social login, mobile/web access, and human-readable addresses.

Transaction Flow:

• USDT0 Transfer: User initiates a gasless USDT0 transfer via Stable Wallet → Signs with EIP-7702 account → Bundler submits to the network → Transfer completes without gas fees.

• Smart Contract Interaction: User pays gas with USDT0 → Bundler and paymaster convert USDT0 to gasUSDT → Contract executes.

Future Plans:

• Optimistic Parallel Execution (OPE): Block-STM enables parallel execution, detecting and re-executing conflicts, providing 2x throughput gains.

• StableVM++: C++-based EVMONE for 6x execution speed.

• USDT Transfer Aggregator: Processes USDT0 transfers in batches, increasing throughput.

• Guaranteed Blockspace: Reserved blockspace for enterprises, ensuring fixed latency and costs.

• Confidential Transfer: Uses ZK cryptography to hide transfer amounts while ensuring regulatory compliance.

Stable Use Cases

Stable is used in the following areas:

• Cross-Border Payments: Gasless USDT0 transfers for low-cost, fast international payments.

• Treasury Operations: Predictable costs and guaranteed blockspace for enterprise payments/settlements.

• DeFi: Gasless, high-throughput DeFi transactions with USDT0.

• Consumer Payments: USDT-linked cards for daily spending.

• Merchant Payment Terminals: Intermediary-free, low-cost USDT acceptance.

• Financial Inclusion: USDT-based financial services in regions with limited banking access.

Usage Steps:

1. Connect to Stable Wallet via social login or MetaMask.

2. Bridge USDT0 to Stable via LayerZero.

3. Perform gasless USDT0 transfers or pay gas with USDT0 for DeFi/NFT transactions.

4. Manage addresses easily with Stable Name.

5. Spend using card integrations.

Advantages of Stable

• High Throughput: Thousands of TPS, sub-second finality.

• Gasless USDT0 Transfer: Zero fees via EIP-7702 and Account Abstraction.

• EVM Compatibility: Seamless development with Ethereum tools.

• Enterprise Features: Guaranteed blockspace, confidential transfers, regulatory compliance.

• User-Friendly: Stable Wallet, Stable Name, social login.

• Cross-Chain: Bridge-less, low-slippage USDT0 transfers.

• Security: StableBFT, ZK cryptography, OFAC compliance.

Stable Tokenomics

Project uses USDT0 and gasUSDT instead of a native token:

• USDT0: ERC-20 token compliant with OFT standard for cross-chain transfers. Bridged to Stable from chains like Ethereum, Arbitrum, and Tron.

• gasUSDT: Gas token, automatically converted from USDT0, with restricted transfers (aligned with OFAC sanctions).

• Distribution: USDT0 leverages existing USDT liquidity, providing deep liquidity from day one.

• Economy: Gasless USDT0 transfers and low-fee smart contract interactions. Guaranteed blockspace offers fixed costs for enterprises.

Stable Investors

Raised $28 million:

• Tier 2: Hack VC, Mirana Ventures, Nascent, KuCoin Ventures, eGirl Capital.

• Tier 3: Castle Island Ventures, Franklin Templeton Investments, PayPal Ventures, Bybit, Blue Pool Capital.

• Tier 4: BTSE, Bitfinex, Susquehanna International Group.

• Individual: Nathan McCauley, Paolo Ardoino, Gabriel Abed, Bryan Johnson.

Technical Infrastructure of Stable

• StableBFT: CometBFT-based PoS, with future Autobahn (DAG) for 200,000+ TPS.

• Stable EVM: EVM-compatible with StableSDK precompiles, StableVM++ for 6x speed.

• StableDB: MemDB, VersionDB, mmap for disk I/O optimization.

• RPC: Lightweight, function-based nodes; 10,000+ RPS, <100ms latency.

• USDT0: OFT standard, gasless cross-chain transfers.

• USDT Transfer Aggregator: Batch transfer processing, parallel execution.

• Confidential Transfer: ZK for hidden amounts, regulatory compliance.

Stable Roadmap

Stable will transform global payments as a USDT-specific blockchain. In Phase 1 (now), it offers gasless USDT0 transfers and EVM compatibility. In Phase 2 (Q4 2025), parallel execution and StableDB will boost throughput. In Phase 3 (Q2 2026), DAG consensus will target 10,000+ TPS. Stable will enhance financial inclusion and efficiency by enabling USDT for daily payments to enterprise settlements.

Stable Team

• Brian Mehler (CEO): 15+ years in finance, venture capital, and blockchain. Former CFO at Gateway Capital, VP at Block.one.

• Sam Kazemian (CTO): Founder of Frax, co-founder of IQ.wiki, expert in payment and stabilization protocols.

• Thibault Reichelt (COO): Invested in Compound, dYdX, Kraken, manages global operations.

Official Links

• Website
• X (Twitter)

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