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PSP34 Burnable

This example shows how you can reuse the implementation of PSP34 token with PSP34Burnable extension.

How to use this extension​

First, you should implement basic version of PSP34.

After you can just add implementation of PSP34Burnable via #[openbrush::implementation(PSP34Burnable)] attribute.

Final code​

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

#[openbrush::implementation(PSP34, PSP34Burnable)]
#[openbrush::contract]
pub mod my_psp34_burnable {
    use openbrush::traits::Storage;

    #[derive(Default, Storage)]
    #[ink(storage)]
    pub struct Contract {
        #[storage_field]
        psp34: psp34::Data,
    }

    impl Contract {
        /// The constructor
        #[ink(constructor)]
        pub fn new() -> Self {
            let mut instance = Self::default();

            psp34::Internal::_mint_to(&mut instance, Self::env().caller(), Id::U8(0u8))
                .expect("Should mint token with id 0");
            psp34::Internal::_mint_to(&mut instance, Self::env().caller(), Id::U8(1u8))
                .expect("Should mint token with id 1");
            psp34::Internal::_mint_to(&mut instance, Self::env().caller(), Id::U8(2u8))
                .expect("Should mint token with id 2");

            instance
        }
    }
}

And that's it! Your PSP34 is now extended by the PSP34Burnable extension and ready to use its functions! You can check an example of the usage of PSP34 Burnable.