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percli_program/instructions/
close_account.rs

1use anchor_lang::prelude::*;
2
3use crate::error::{from_risk_error, PercolatorError};
4use crate::state::{engine_from_account_data, MARKET_ACCOUNT_SIZE};
5
6#[derive(Accounts)]
7pub struct CloseAccount<'info> {
8    pub user: Signer<'info>,
9
10    /// CHECK: Validated via discriminator and size.
11    #[account(
12        mut,
13        constraint = market.data_len() == MARKET_ACCOUNT_SIZE @ PercolatorError::AccountNotFound,
14    )]
15    pub market: UncheckedAccount<'info>,
16}
17
18pub fn handler(ctx: Context<CloseAccount>, account_idx: u16, funding_rate: i64) -> Result<()> {
19    let market = &ctx.accounts.market;
20    let mut data = market.try_borrow_mut_data()?;
21
22    require!(&data[0..8] == b"percmrkt", PercolatorError::AccountNotFound);
23
24    let engine = engine_from_account_data(&mut data);
25    let oracle_price = engine.last_oracle_price;
26    let clock = Clock::get()?;
27
28    engine
29        .close_account_not_atomic(account_idx, clock.slot, oracle_price, funding_rate)
30        .map_err(from_risk_error)?;
31
32    Ok(())
33}