Trait hdk::prelude::link::LinkTypesHelper

pub trait LinkTypesHelper {
    type Error;

    fn from_type<Z, I>(
        zome_id: Z,
        link_type: I
    ) -> Result<Option<Self>, Self::Error>
    where
        Z: Into<ZomeId>,
        I: Into<LinkType>;
}

A helper trait for finding the app defined link type from a ZomeId and LinkType.

If the zome id is a dependency of the calling zome and the link type is out of range (greater than the number of defined link types) then a guest error is return (which will invalidate an op if used in the validation callback).

If the zome id is not a dependency of the calling zome then this will return None.

Required Associated Types

type Error

The error associated with this conversion.

Required Methods

fn from_type<Z, I>(zome_id: Z, link_type: I) -> Result<Option<Self>, Self::Error> where
    Z: Into<ZomeId>,
    I: Into<LinkType>, 

Check if the ZomeId and LinkType matches one of the ZomeLinkTypeKey::from(Self::variant) and if it does return that type.

Implementations on Foreign Types

impl LinkTypesHelper for ()

type Error = Infallible

fn from_type<Z, I>(
    _zome_id: Z,
    _link_type: I
) -> Result<Option<()>, <() as LinkTypesHelper>::Error> where
    Z: Into<ZomeId>,
    I: Into<LinkType>, 

Implementors