mint_deserialization.rs

// import Pack trait
use solana_program::{
    program_pack::Pack,
};
// import type
use spl_token::{
	state::Mint,
}
// code inside of `process_instruction`
// mint_account is of type `AccountInfo` retrieved previously
let mint = Mint::unpack_from_slice(&mint_account.try_borrow_data()?)?;
msg!("mint decimals: {}", mint.decimals);