Struct FallbackHandler 

pub struct FallbackHandler;

Default handler that always falls back to the ink function body.

Use this as the handler argument to FlowInstance::step_single_line or FlowInstance::choose when you don’t want to provide a custom external-function binding registry. Every external call returns ExternalResult::Fallback, delegating to the in-story fallback container declared on the EXTERNAL declaration.

Trait Implementations

impl ExternalFnHandler for FallbackHandler

fn call(&self, _name: &str, _args: &[Value]) -> ExternalResult

Handle an external function call.