sov-modules-macros 0.3.0

Macros for use with the Sovereign SDK module system
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use syn::DeriveInput;

pub fn derive_module_call_json_schema(
    input: DeriveInput,
) -> Result<proc_macro::TokenStream, syn::Error> {
    let DeriveInput {
        ident, generics, ..
    } = input;

    let (impl_generics, type_generics, where_clause) = generics.split_for_impl();

    let tokens = quote::quote! {
        use ::schemars::JsonSchema as _;

        impl #impl_generics ::sov_modules_api::ModuleCallJsonSchema for #ident #type_generics #where_clause {
            fn json_schema() -> ::std::string::String {
                let schema = ::schemars::schema_for!(
                    <Self as ::sov_modules_api::Module>::CallMessage
                );
                ::serde_json::to_string_pretty(&schema).expect("Failed to serialize JSON schema; this is a bug in the module")
            }
        }
    };

    Ok(tokens.into())
}