CredenceChain

        let token_account = next_account_info(account_iter)?;        let mint_authority = next_account_info(account_iter)?;         // Ensure the mint_authority is correct (you can implement your own authorization logic)         // Mint new tokens        let mut token_data = token_account.try_borrow_mut_data()?;        let mut token_balance = u64::from_le_bytes(*token_data);         token_balance = token_balance.checked_add(amount).ok_or(ProgramError::Overflow)?;        token_data.copy_from_slice(&token_balance.to_le_bytes());         msg!("GreenTokens minted successfully!");        Ok(())    }     fn transfer(        program_id: &Pubkey,        accounts: &[AccountInfo],        from_amount: u64,        to_account: &Pubkey,    ) -> ProgramResult {        let account_iter = &mut accounts.iter();        let from_account = next_account_info(account_iter)?;

1. Line 34 token_balance = token_balance.checked_add(amount).ok_or(ProgramError::Overflow)?;: Uses checked arithmetic so overflow fails instead of wrapping.
2. Line 37 msg!("GreenTokens minted successfully!");: Logs to the program log, which is visible in explorers and the test output.