cypherpunk-hackathon2025

pub struct CreateMarket<'info> {    #[account(        init,        payer = authority,        space = 8 + Market::INIT_SPACE,        seeds = [b"market", authority.key().as_ref(), &Sha256::digest(question.as_bytes())[..]],        bump    )]    pub market: Account<'info, Market>,        #[account(mut)]    pub authority: Signer<'info>,        pub system_program: Program<'info, System>,} #[derive(Accounts)]pub struct PlaceBet<'info> {    #[account(mut)]    pub market: Account<'info, Market>,        #[account(        init_if_needed,        payer = user,

1. Line 207 init,: Creates and pays for a new account. Space and payer must be specified.
2. Line 210 seeds = [b"market", authority.key().as_ref(), &Sha256::digest(question.as_bytes())[..]],: Declares the PDA seeds. Anchor re-derives the address and rejects the account if it doesn't match.
3. Line 211 bump: Uses the bump seed, the extra byte that pushes the derived address off the ed25519 curve.
4. Line 216 pub authority: Signer<'info>,: Requires this account to have signed the transaction.
5. Line 227 init_if_needed,: Creates the account only if it doesn't exist. Watch for re-initialisation bugs.

    #[account(        init,        payer = authority,        space = 8 + Market::INIT_SPACE,        seeds = [b"market", authority.key().as_ref(), question.as_bytes()],        bump    )]    pub market: Account<'info, Market>,        #[account(mut)]    pub authority: Signer<'info>,        pub system_program: Program<'info, System>,} #[derive(Accounts)]pub struct PlaceBet<'info> {    #[account(mut)]    pub market: Account<'info, Market>,        #[account(        init_if_needed,        payer = user,        space = 8 + UserPosition::INIT_SPACE,

1. Line 206 init,: Creates and pays for a new account. Space and payer must be specified.
2. Line 209 seeds = [b"market", authority.key().as_ref(), question.as_bytes()],: Declares the PDA seeds. Anchor re-derives the address and rejects the account if it doesn't match.
3. Line 210 bump: Uses the bump seed, the extra byte that pushes the derived address off the ed25519 curve.
4. Line 215 pub authority: Signer<'info>,: Requires this account to have signed the transaction.
5. Line 226 init_if_needed,: Creates the account only if it doesn't exist. Watch for re-initialisation bugs.

    pub fn place_bet(        ctx: Context<PlaceBet>,        outcome: bool,        amount: u64,    ) -> Result<()> {        require!(amount > 0, PredictionMarketError::InvalidAmount);                let market = &mut ctx.accounts.market;        require!(!market.resolved, PredictionMarketError::MarketResolved);        require!(            Clock::get()?.unix_timestamp < market.end_time,            PredictionMarketError::MarketExpired        );         let position = &mut ctx.accounts.position;        position.user = ctx.accounts.user.key();        position.market = market.key();        position.outcome = outcome;        position.amount = position.amount.checked_add(amount).unwrap();        position.claimed = false;        position.bump = ctx.bumps.position;         if outcome {            market.total_yes_amount = market.total_yes_amount.checked_add(amount).unwrap();

1. Line 42 require!(amount > 0, PredictionMarketError::InvalidAmount);: An explicit validation that aborts the instruction with an error.
2. Line 47 Clock::get()?.unix_timestamp < market.end_time,: Reads on-chain time from the Clock sysvar.
3. Line 55 position.amount = position.amount.checked_add(amount).unwrap();: Uses checked arithmetic so overflow fails instead of wrapping.
4. Line 57 position.bump = ctx.bumps.position;: Uses the bump seed, the extra byte that pushes the derived address off the ed25519 curve.

         // Transfer SOL        let cpi_ctx = CpiContext::new(            ctx.accounts.system_program.to_account_info(),            anchor_lang::system_program::Transfer {                from: ctx.accounts.user.to_account_info(),                to: ctx.accounts.vault.to_account_info(),            },        );        anchor_lang::system_program::transfer(cpi_ctx, amount)?;        Ok(())    }} #[derive(Accounts)]pub struct CreateMarket<'info> {    #[account(        init,        payer = authority,        space = 8 + 32 + 100 + 8 + 8 + 8 + 1,        seeds = [b"market", authority.key().as_ref()],        bump    )]    pub market: Account<'info, Market>,

1. Line 39 let cpi_ctx = CpiContext::new(: Makes a cross-program invocation into another program.
2. Line 54 init,: Creates and pays for a new account. Space and payer must be specified.
3. Line 57 seeds = [b"market", authority.key().as_ref()],: Declares the PDA seeds. Anchor re-derives the address and rejects the account if it doesn't match.
4. Line 58 bump: Uses the bump seed, the extra byte that pushes the derived address off the ed25519 curve.