96 lines
3.8 KiB
Rust
96 lines
3.8 KiB
Rust
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use anchor_lang::prelude::*;
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use bytemuck::cast_ref;
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use crate::error::MangoError;
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use crate::{state::{PerpMarket, Group, Queue, EventType, FillEvent, OutEvent, EventQueueHeader, MangoAccount}, util::LoadZeroCopy};
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#[derive(Accounts)]
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pub struct ConsumeEvents<'info> {
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pub group: AccountLoader<'info, Group>,
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#[account(
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mut,
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has_one = group,
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)]
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pub perp_market: AccountLoader<'info, PerpMarket>,
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#[account(mut)]
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pub event_queue: AccountLoader<'info, Queue<EventQueueHeader>>,
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}
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pub fn consume_events(ctx:Context<ConsumeEvents>, limit: usize) -> Result<()> {
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let limit = std::cmp::min(limit, 8);
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let mut perp_market =ctx.accounts.perp_market.load_mut()?;
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let mut event_queue = ctx.accounts.event_queue.load_mut()?;
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let mango_account_ais = &ctx.remaining_accounts;
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for _ in 0..limit {
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let event = match event_queue.peek_front() {
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None => break,
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Some(e) => e,
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};
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match EventType::try_from(event.event_type).map_err(|_|error!(MangoError::SomeError))? {
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EventType::Fill => {
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let fill: &FillEvent = cast_ref(event);
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// handle self trade separately because of rust borrow checker
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if fill.maker == fill.taker {
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let mut ma = match mango_account_ais.iter().find(|ai| ai.key == &fill.maker) {
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None => {
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msg!("Unable to find account {}", fill.maker.to_string());
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return Ok(());
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}
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Some(account_info) =>account_info.load_mut::<MangoAccount>()?,
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};
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ma.execute_maker(perp_market.perp_market_index, &mut perp_market, fill)?;
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ma.execute_taker(perp_market.perp_market_index, &mut perp_market, fill)?;
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} else {
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let mut maker = match mango_account_ais.iter().find(|ai| ai.key == &fill.maker)
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{
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None => {
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msg!("Unable to find maker account {}", fill.maker.to_string());
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return Ok(());
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}
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Some(account_info) =>account_info.load_mut::<MangoAccount>()?,
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};
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let mut taker = match mango_account_ais.iter().find(|ai| ai.key == &fill.taker)
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{
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None => {
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msg!("Unable to find taker account {}", fill.taker.to_string());
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return Ok(());
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}
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Some(account_info) =>account_info.load_mut::<MangoAccount>()?,
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};
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maker.execute_maker(perp_market.perp_market_index, &mut perp_market, fill)?;
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taker.execute_taker(perp_market.perp_market_index, &mut perp_market, fill)?;
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}
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}
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EventType::Out => {
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let out: &OutEvent = cast_ref(event);
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let mut ma = match mango_account_ais.iter().find(|ai| ai.key == &out.owner) {
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None => {
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msg!("Unable to find account {}", out.owner.to_string());
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return Ok(());
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}
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Some(account_info) =>account_info.load_mut::<MangoAccount>()?,
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};
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ma.remove_order(out.owner_slot as usize, out.quantity)?;
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}
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EventType::Liquidate => {
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// This is purely for record keeping. Can be removed if program logs are superior
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}
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}
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// consume this event
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event_queue.pop_front()?;
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}
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Ok(())
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}
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