Struct VMLogic 

pub struct VMLogic<'a> { /* private fields */ }

The core logic controller for the VM.

This struct manages the state of an execution, including storage, memory, registers, and the results of the execution (logs, events, return values).

Implementations

impl VMLogic<'_>

pub fn imports(&mut self, store: &mut Store) -> Imports

impl<'a> VMLogic<'a>

pub fn new( storage: &'a mut dyn Storage, context: VMContext<'a>, limits: &'a VMLimits, node_client: Option<NodeClient>, ) -> Self

Creates a new VMLogic instance.

Arguments

• storage - A mutable reference to the storage implementation.
• context - The execution context for the VM.
• limits - The VM resource limits to enforce.
• node_client - An optional client for blob storage operations.

pub fn with_memory(&mut self, memory: Memory) -> &mut Self

Associates a Wasmer memory instance with this VMLogic.

This method should be called after the guest module is instantiated but before any host functions are called.

Arguments

• memory - The wasmer::Memory instance from the instantiated guest module.

pub fn host_functions(&'a mut self, store: StoreMut<'a>) -> VMHostFunctions<'a>

Creates a VMHostFunctions instance to be imported by the guest module.

This method builds the self-referential struct that provides guest code with access to host capabilities.

Panics

Panics if with_memory has not been called first.

Arguments

• store - A mutable view of the Wasmer store.

impl VMLogic<'_>

pub fn finish(self, err: Option<FunctionCallError>) -> Outcome

Consumes the VMLogic instance and produces the final Outcome.

This method should be called after the guest function has finished executing or has trapped. It packages the final state of the VMLogic into an Outcome struct.

Arguments

• err - An optional FunctionCallError that occurred during execution (e.g., a trap). If None, the outcome is determined by the returns field.