Module borrow 

Hopper-owned borrow guards for account data.

Ref and RefMut are the safe, drop-guarded handles returned by every Hopper access path: load(), segment_ref(), raw_ref(), and the mutable variants. The representation is backend-sensitive so the hot path stays tight:

• Solana (on-chain). { ptr, state_ptr }. Two pointer words, no extra guards, no slice fat-pointer, no ZSTs. Drop decrements or restores the single borrow_state byte on the RuntimeAccount directly. This is Hopper Native’s pointer-shaped hot path with deterministic RAII release built into the guard.

• non-Solana host tests. { ptr, guard, token, _marker }. Richer because host tests rely on the active backend’s borrow machinery (RefCell, etc.) plus Hopper’s own cross-handle alias registry (BorrowToken). Both are real RAII and must live until the runtime guard drops.

Both reprs expose the same surface: Deref/DerefMut into T, as_ptr / as_mut_ptr, byte-slice narrowing (slice, slice_from), and byte-level pointer projection (project). Generated accessors use the same API on both targets while the target-specific representation remains internal.

Structs

Ref

RefMut