spl-token-wrap 1.0.0

Solana Program Library Token Wrap
Documentation 
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use {
    solana_account_info::AccountInfo,
    solana_program_error::{ProgramError, ProgramResult},
    solana_pubkey::Pubkey,
};

/// The interface for customizing attributes of the new wrapped mint.
pub trait MintCustomizer {
    /// Calculates the space required for a new spl-token-2022 mint
    /// account, including any custom extensions
    fn get_token_2022_mint_space() -> Result<usize, ProgramError>;

    /// Customizes extensions for the wrapped mint *before* the base mint is
    /// initialized. This is for extensions that must be initialized on an
    /// uninitialized mint account, like `ConfidentialTransferMint`.
    fn initialize_extensions(
        _wrapped_mint_account: &AccountInfo,
        _wrapped_token_program_account: &AccountInfo,
    ) -> ProgramResult {
        Ok(())
    }

    /// Customize the freeze authority and decimals for the wrapped mint
    fn get_freeze_auth_and_decimals(
        unwrapped_mint_account: &AccountInfo,
    ) -> Result<(Option<Pubkey>, u8), ProgramError>;
}