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PSP37 Enumerable

This example shows how you can reuse the implementation of PSP37 token with PSP37Enumerable extension. First, you should implement basic version of PSP37.

Step 1: Implement PSP37Enumerable​

Import everything from openbrush::contracts::psp37::extensions::enumerable.

#![cfg_attr(not(feature = "std"), no_std, no_main)]

#[openbrush::contract]
#[openbrush::implementation(..., PSP37, PSP37Enumerable, ...)]
pub mod my_psp37 {
...

Step 2: Define storage​

#[derive(Default, Storage)]
#[ink(storage)]
pub struct Contract {
    #[storage_field]
    psp37: psp37::Data,
    #[storage_field]
    enumerable: enumerable::Data,
}

Final code​

#![cfg_attr(not(feature = "std"), no_std, no_main)]

#[openbrush::implementation(PSP37, PSP37Batch, PSP37Burnable, PSP37Mintable, PSP37Enumerable)]
#[openbrush::contract]
pub mod my_psp37_enumerable {
    use openbrush::traits::Storage;

    #[derive(Default, Storage)]
    #[ink(storage)]
    pub struct Contract {
        #[storage_field]
        psp37: psp37::Data,
        #[storage_field]
        enumerable: enumerable::Data,
    }

    impl Contract {
        #[ink(constructor)]
        pub fn new() -> Self {
            Self::default()
        }
    }
}

And that's it! Your PSP37 is now extended by the PSP37Enumerable extension and ready to use its functions! You can check an example of the usage of PSP37 Enumerable.