package domain

import "fmt"

// ResolveTransientRetries selects a nonnegative retry budget. A nil selection
// inherits the supplied default.
func ResolveTransientRetries(defaultBudget uint64, selection *int) (uint64, error) {
	if selection == nil {
		return defaultBudget, nil
	}
	if *selection < 0 {
		return 0, fmt.Errorf("transient retries must not be negative")
	}
	return uint64(*selection), nil
}