Refactor pvq-extension

[indirection42]

Change proc_macro style to proc_macro_attribute style

#[extension_decl]
mod extension_core {
    #[extension_decl::config]
    pub trait Config {
        type ExtensionId: Codec;
    }
    #[extension_decl::view_fns]
    pub trait ExtensionCore<T: Config> {
        fn has_extension(id: T::ExtensionId) -> bool;
    }
}

#[extension_decl]
mod extension_fungibles {
    #[extension_decl::config]
    pub trait Config {
        type AssetId: Codec;
        type AccountId: Codec;
        type Balance: Codec;
    }

    #[extension_decl::view_fns]
    pub trait ExtensionFungibles<T: Config> {
        fn total_supply(asset: T::AssetId) -> T::Balance;
        fn balance(asset: T::AssetId, who: T::AccountId) -> T::Balance;
    }
}

#[extensions_impl]
mod extensions_impl {

    #[extensions_impl::extensions_config]
    pub struct ExtensionsConfig;
    #[extensions_impl::extensions_struct]
    pub struct Extensions;

    #[extensions_impl::extensions_config_impl]
    impl extension_core::Config for ExtensionsConfig {
        type ExtensionId = u64;
    }

    #[extensions_impl::extensions_config_impl]
    impl extension_fungibles::Config for ExtensionsConfig {
        type AssetId = u32;
        type AccountId = [u8; 32];
        type Balance = u64;
    }

    #[extensions_impl::extension_struct_impl]
    impl extension_core::ExtensionCore<ExtensionConfig> for Extensions {
        fn has_extension(id: u64) -> bool {
            matches!(id, 0 | 1)
        }
    }

    #[extensions_impl::extension_struct_impl]
    impl extension_fungibles::ExtensionFungibles<ExtensionConfig> for Extensions {
        fn total_supply(asset: u32) -> u64 {
            200
        }
        fn balance(asset: u32, who: [u8; 32]) -> u64 {
            100
        }
    }
}

• extension_decl
  • basic
  • support config
• extensions_impl
  • basic
  • metadata generation