Struct LayoutBehavior 

pub struct LayoutBehavior {
    pub requires_signer: bool,
    pub affects_balance: bool,
    pub affects_authority: bool,
    pub mutation_class: MutationClass,
}

Describes how a layout behaves under mutation, what policy it expects, and what receipt profile it should produce.

Attach this to a layout manifest to give Hopper’s lint engine, Manager, and receipt system enough context to validate mutations semantically.

Fields

requires_signer: bool

Whether any instruction mutating this layout requires a signer.

affects_balance: bool

Whether mutations affect balance/financial fields.

affects_authority: bool

Whether mutations affect authority/owner/delegate fields.

mutation_class: MutationClass

Primary mutation class for this layout.

Implementations

impl LayoutBehavior

pub const READ_ONLY: Self

A read-only layout that should never be mutated.

pub const STANDARD: Self

Default behavior for a standard mutable account.

pub const FINANCIAL: Self

Behavior for a treasury/vault layout that manages balances.

pub const APPEND_ONLY: Self

Behavior for an append-only journal or audit log.

Trait Implementations

impl Clone for LayoutBehavior

fn clone(&self) -> LayoutBehavior

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LayoutBehavior

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for LayoutBehavior

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for LayoutBehavior