fltemp 0.1.0

Flash Trade - Solana Perpetuals Exchange
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81

//! GetLiquidationState instruction handler

use {
    crate::state::{
        custody::Custody, oracle::OraclePrice, perpetuals::Perpetuals, pool::Pool,
        position::Position,
    },
    anchor_lang::prelude::*,
};

#[derive(Accounts)]
pub struct GetLiquidationState<'info> {
    #[account(
        seeds = [b"perpetuals"],
        bump = perpetuals.perpetuals_bump
    )]
    pub perpetuals: Box<Account<'info, Perpetuals>>,

    #[account(
        seeds = [b"pool",
                 pool.name.as_bytes()],
        bump = pool.bump
    )]
    pub pool: Box<Account<'info, Pool>>,

    #[account(
        seeds = [b"position",
                 position.owner.as_ref(),
                 pool.key().as_ref(),
                 custody.key().as_ref(),
                 &[position.side as u8]],
        bump = position.bump
    )]
    pub position: Box<Account<'info, Position>>,

    #[account(
        seeds = [b"custody",
                 pool.key().as_ref(),
                 custody.mint.as_ref()],
        bump = custody.bump
    )]
    pub custody: Box<Account<'info, Custody>>,

    /// CHECK: oracle account for the collateral token
    #[account(
        constraint = custody_oracle_account.key() == custody.oracle.oracle_account
    )]
    pub custody_oracle_account: AccountInfo<'info>,
}

#[derive(AnchorSerialize, AnchorDeserialize)]
pub struct GetLiquidationStateParams {}

pub fn get_liquidation_state(
    ctx: Context<GetLiquidationState>,
    _params: &GetLiquidationStateParams,
) -> Result<u8> {
    let custody = ctx.accounts.custody.as_mut();
    let curtime = ctx.accounts.perpetuals.get_time()?;

    let token_ema_price = OraclePrice::new_from_oracle(
        custody.oracle.oracle_type,
        &ctx.accounts.custody_oracle_account.to_account_info(),
        custody.oracle.max_price_error,
        custody.oracle.max_price_age_sec,
        curtime,
        custody.pricing.use_ema,
    )?;

    if ctx.accounts.pool.check_leverage(
        &ctx.accounts.position,
        &token_ema_price,
        custody,
        curtime,
        false,
    )? {
        Ok(0)
    } else {
        Ok(1)
    }
}