Function BeforeStep

protocol/txvm/option.go:35–39

BeforeStep can be passed as an option to Validate. It adds a callback to be invoked just before each instruction is executed.

(h ...func(*VM))

// BeforeStep can be passed as an option to Validate. It adds a
// callback to be invoked just before each instruction is executed.
func BeforeStep(h ...func(*VM)) Option {
	return Option{
		apply: func(vm *VM) { vm.beforeStep = append(vm.beforeStep, h...) },
	}
}

// AfterStep can be passed as an option to Validate. It adds a
// callback to be invoked after each instruction is executed.