Solana Stablecoin Standard

GitHub: solanabr/solana-stablecoin-standard Status: Complete — v1 shipped March 2026; repository archived (read-only), available as a reference implementation Maintained by: @lvj_luiz and @kauenet

Overview

A standardized interface for stablecoin issuance and management on Solana. Defines two specifications — SSS-1 (minimal) for core stablecoin functionality and SSS-2 (compliant), which adds blacklist enforcement via transfer hook and KYC-gated accounts.

The v1 release shipped a complete toolkit: the SSS-Core Anchor program, a blacklist transfer-hook program, a CLI, a TypeScript SDK, a REST backend, and a React demo.

Why It Matters

Stablecoins are the backbone of DeFi. Without a shared standard, each issuer implements minting, burning, freezing, and compliance controls differently. This fragments the ecosystem: exchanges need custom integrations per stablecoin, DeFi protocols cannot generalize their stablecoin handling, and compliance becomes ad-hoc.

The Solana Stablecoin Standard provides a common interface so that issuers, exchanges, and DeFi protocols can interoperate through a single specification.

Features

SSS-1 (Minimal)

The core stablecoin interface covering fundamental operations:

• Mint and burn controls
• Freeze and thaw accounts
• Transfer restrictions
• Authority management

SSS-2 (Compliant)

Builds on SSS-1 with blacklist enforcement via transfer hook and KYC-gated accounts, for institutional and compliance-focused deployments:

• Compliance hooks for KYC/AML enforcement
• Blacklisting and whitelisting
• Upgradeable oracle integration
• Configurable transfer restrictions

OpenZeppelin Collaboration

Main contributor @lvj_luiz from OpenZeppelin brings battle-tested security expertise from the Ethereum ecosystem. The standard benefits from the same rigor applied to OpenZeppelin's widely-used Solidity contracts.

Compliance-Ready

Built with regulatory requirements in mind. Transfer hooks enable issuers to enforce KYC checks, geographic restrictions, and other compliance policies at the protocol level.

Token-2022 Native

Leverages Solana's Token Extensions program for advanced functionality:

• Transfer hooks for compliance enforcement
• Confidential transfers for privacy-preserving payments
• Non-transferable metadata for issuer attestations

Live References

• Video demo: Solana Stablecoin Standard demo
• SSS-Core program (devnet): 4ZFzYcNVDSew79hSAVRdtDuMqe9g4vYh7CFvitPSy5DD
• Blacklist Transfer Hook program (devnet): 84rPjkmmoP3oYZVxjtL2rdcT6hC5Rts6N5XzJTFcJEk6

Both program IDs are as listed in the repository README.

Tech Stack

• Anchor
• Token-2022
• Rust