Futstar-official

        msg!("Long position opened: {} SOL at momentum index {}",              amount as f64 / 1e9 as f64,              position.entry_momentum_index);                Ok(())    }     /// Open a short position (bet on momentum decrease)    pub fn open_short_position(        ctx: Context<OpenPosition>,        amount: u64,        window_duration: i64,    ) -> Result<()> {        let position = &mut ctx.accounts.trading_position;        let pool = &mut ctx.accounts.momentum_pool;        let clock = Clock::get()?;                require!(pool.is_active, TradingError::PoolNotActive);        require!(amount > 0, TradingError::InvalidAmount);                // Transfer tokens from user to pool        token::transfer(            CpiContext::new(                ctx.accounts.token_program.to_account_info(),

1. Line 73 msg!("Long position opened: {} SOL at momentum index {}",: Logs to the program log, which is visible in explorers and the test output.
2. Line 88 let clock = Clock::get()?;: Reads on-chain time from the Clock sysvar.
3. Line 90 require!(pool.is_active, TradingError::PoolNotActive);: An explicit validation that aborts the instruction with an error.
4. Line 94 token::transfer(: An SPL token transfer through the Token Program.
5. Line 95 CpiContext::new(: Makes a cross-program invocation into another program.