SSTS is a security token standard on Solana using the SPL Token 2022 with extensions to provide a foundation for compliant security tokens on Solana with configurable verification and corporate action support.  The goal is to facilitate the on-chain issuance and trading of traditional securities (such as stocks, bonds, etc.) in a manner that is flexible enough to adapt to various regulatory regimes and business rules. The design emphasizes neutrality and extensibility, allowing users and issuers to define custom workflows that comply with arbitrary rules and regulations. In essence, the program aims to provide a general on-chain framework for security tokens, without baking in assumptions specific to any single jurisdiction or asset class. 

Assumptions: SPL Mints represent securities. Each security instrument is represented by its own SPL token mint (using Solana Program Library's token programs). For example, a company's common stock or a particular bond issuance would correspond to a unique token mint on Solana. 

SPL Accounts represent individual security holder balances. An individual holder's balance in a given security is tracked by an SPL token account for that mint. Investors hold their security tokens in accounts analogous to brokerage accounts (each account holding tokens of one specific mint/security). 

A standard built by Halborn, Hoodies and a panel of Industry Experts with support from Solana Foundation to accelerate digital transformation of financial services.