Derive Macro Manifest 

#[derive(Manifest)]
{
    // Attributes available to this derive:
    #[manifest]
}

Derives the Manifest trait for storage access declarations.

Attributes

• #[manifest(read)] - Declares read access to a slot
• #[manifest(write)] - Declares write access to a slot
• #[manifest(commutative)] - Declares commutative access

Example

#[derive(Manifest)]
struct Counter {
    #[manifest(read, write)]
    value: Slot,
}