Module frame 

Borrowed-state execution context.

The Frame is Hopper’s execution model. It wraps the instruction’s accounts and data, enforcing single-mutable-borrow discipline and phased execution.

Execution Phases

1. Resolve – Parse accounts from the input slice into named typed slots
2. Validate – Run the validation graph (account-local, cross-account, state-transition)
3. Borrow – Obtain zero-copy overlays with borrow discipline
4. Mutate – Execute state changes through verified mutable references
5. Emit – Fire events
6. Commit – (implicit: Solana runtime commits on success)

The Frame ensures that:

• Each account is borrowed at most once mutably
• Immutable borrows can coexist
• Validation runs before mutation
• Events are emitted after state changes

Modules

args

Phase-specific instruction argument decomposition.

phase

Phased execution builder for the Frame.

Structs

Frame

Execution frame holding the instruction’s accounts and data.

FrameAccount

Immutable account view within a Frame.

FrameAccountMut

Mutable account view within a Frame.

Constants

MAX_FRAME_ACCOUNTS

Maximum accounts in a single frame. Matches Solana’s transaction limit.