Three social media posts discuss Solana DeFi developments: STEALF, a privacy-focused app for crypto spending on Solana using encryption protocols, launching its MVP next week; USD.infra integration coming to Orca, a leading AMM on Solana for tokenized real-world assets; and Injective, a Layer 1 blockchain for financial applications, expanding to Solana with no remaining token unlocks and active buyback-and-burn mechanisms.