Generate did file automatically

Developers Rust
1

Is there a way to generate automatically the did file for the public query and update functions and types in Rust - as in Motoko - or the did file should really be edited manually?

2

@lwshang you’re working on this right now. What’s the current best practice?

3

Hi @peterparker,

We currently don’t have a clean way to auto generate candid for rust canister.

While there is a workaround as described in this post:

The SDK team envisions a redesign of Rust CDK which can provide more ergonomic developer experience. Auto generating candid is one of the features we plan to provide. The work is still in early stage.

4

Thanks for the feedback, looking forward to it then.

Workaround described in related post did not work out for me, I got an empty service : {} as outcome. Did not dig that deep in though.

5

I suspect you also need to add this to the methods you’d like to include in the generated Candid:

use ic_cdk::export::candid::candid_method;

#[candid_method(query)]

#[candid_method(update)]
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6

Good catch! The service gets filled.

type Asset = record { key : text; value : vec nat8 };
type State = record { owner : text; assets : vec record { text; Asset } };
service : { get : () -> (State) query }

Thanks!

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