CPIs

How Solana programs call other programs - account passing, invoke vs invoke_signed, depth limits, System and Token CPIs, reentrancy, and composability.

Calling one program from another.

Regular calls vs. PDA-signed calls.

Account infos, ordering, and privileges.

Creating accounts and transferring SOL.

Mint, transfer, and burn from a program.

Safe, minimal, well-scoped invocations.