Trade perps.Settle on Solana.

// Settle a perp position — close or liquidation path
pub fn close_position(ctx: Context<ClosePosition>) -> Result<()> {
    let position = &mut ctx.accounts.position;
    let market = &mut ctx.accounts.market;
 
    // Mark to the Pyth oracle price
    let price = market.oracle_price()?;
    let pnl = position.realized_pnl(price);
 
    // Take protocol fee, pay funding, release collateral
    let fee = position.notional
        .checked_mul(market.fee_bps as u64)
        .unwrap() / 10_000;
    // Settle PnL to trader, update reputation score
    trader.score = trader.score.saturating_add(1);
    ...
}