$TETSUO Developer Update: SolC. Our OSS Solana C Framework streamlines the development of Solana programs in C by providing a flexible, layered set of macros at a high level, like DEFINE_INSTRUCTION or TOKEN_TRANSFER. These macros enable rapid, secure implementation of common patterns while allowing developers also to use our lower-level macros or our native Solana C functions for fine-grained control. For example, we built a token vesting program using this framework (see screenshot). This Solana smart contract manages the gradual release of tokens over time with the following features: Purpose: Enables an admin to lock tokens for a recipient, releasing them linearly based on a predefined schedule. Key Functions: - Initialize: Admin sets up the vesting schedule with recipient, token amount, and start/end dates. - Claim: Recipient claims available tokens, calculated from elapsed time. - Cancel: Admin can cancel and reclaim unvested tokens. Vesting Mechanism: Using a linear formula, tokens unlock steadily between start and end dates. Security: Enforces strict permissions (e.g., only recipients claim, only admins cancel) and uses overflow-safe math. With this framework, you can build Solana programs faster and safer, with the exact control you need, all in C.