Trait dharitri_wasm::io::dyn_arg_input::DynArgInput

pub trait DynArgInput<I: TopDecodeInput>: ErrorApi + Sized {
    // Required methods
    fn has_next(&self) -> bool;
    fn next_arg_input(&mut self) -> I;

    // Provided method
    fn assert_no_more_args(&self) { ... }
}

Abstracts away the loading of multi-arguments. Acts as an abstract source for these arguments.

The main method, next_arg_input will provide a decode input, from which any deserializable object can be deserialized.

Structs implementing this trait are also responsible with error handling, such as:

• deserialization errors
• insufficient arguments
• too many arguments For this reason it also requires the ErrorApi trait.

There are 2 main scenarios for it:

• deserializing endpoint arguments directly from the API
• deserializing callback arguments saved to storage, from a call data string

Required Methods

fn has_next(&self) -> bool

Check if there are more arguments that can be loaded.

fn next_arg_input(&mut self) -> I

Retrieves an input for deserializing an argument. If the loader is out of arguments, it will crash by itself with an appropriate error, without returning. Use if the next argument is optional, use has_next beforehand.

Provided Methods

fn assert_no_more_args(&self)

Called after retrieving all arguments to validate that extra arguments were not provided.

Object Safety

This trait is not object safe.

Implementors

impl<'a, SE> DynArgInput<&'a [u8]> for BytesArgLoader<'a, SE>

where SE: ErrorApi,

impl<'a, SE> DynArgInput<Vec<u8>> for CallDataArgLoader<'a, SE>

where SE: ErrorApi,

impl<AA> DynArgInput<ArgDecodeInput<AA>> for EndpointDynArgLoader<AA>

where AA: EndpointArgumentApi + Clone + 'static,