88 lines
3.0 KiB
Rust
88 lines
3.0 KiB
Rust
use anchor_lang::prelude::*;
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use crate::error::*;
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use crate::state::*;
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#[derive(Accounts)]
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pub struct Serum3CreateOpenOrders<'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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has_one = owner,
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)]
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pub account: AccountLoader<'info, MangoAccount>,
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#[account(
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has_one = group,
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has_one = serum_program,
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has_one = serum_market_external,
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)]
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pub serum_market: AccountLoader<'info, Serum3Market>,
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/// CHECK: The pubkey is checked and then it's passed to the serum cpi
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pub serum_program: UncheckedAccount<'info>,
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/// CHECK: The pubkey is checked and then it's passed to the serum cpi
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pub serum_market_external: UncheckedAccount<'info>,
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// initialized by this instruction via cpi to serum
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#[account(
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init,
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seeds = [account.key().as_ref(), b"Serum3OO".as_ref(), serum_market.key().as_ref()],
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bump,
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payer = payer,
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owner = serum_program.key(),
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// 12 is the padding serum uses for accounts ("serum" prefix, "padding" postfix)
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space = 12 + std::mem::size_of::<serum_dex::state::OpenOrders>(),
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)]
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/// CHECK: Newly created by serum cpi call
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pub open_orders: UncheckedAccount<'info>,
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pub owner: Signer<'info>,
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#[account(mut)]
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pub payer: Signer<'info>,
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pub system_program: Program<'info, System>,
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pub rent: Sysvar<'info, Rent>,
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}
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pub fn serum3_create_open_orders(ctx: Context<Serum3CreateOpenOrders>) -> Result<()> {
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cpi_init_open_orders(ctx.accounts)?;
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let serum_market = ctx.accounts.serum_market.load()?;
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let mut account = ctx.accounts.account.load_mut()?;
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require!(account.is_bankrupt == 0, MangoError::IsBankrupt);
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let serum_account = account.serum3.create(serum_market.market_index)?;
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serum_account.open_orders = ctx.accounts.open_orders.key();
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serum_account.base_token_index = serum_market.base_token_index;
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serum_account.quote_token_index = serum_market.quote_token_index;
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// Make it so that the token_account_map for the base and quote currency
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// stay permanently blocked. Otherwise users may end up in situations where
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// they can't settle a market because they don't have free token_account_map!
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let (quote_position, _, _) = account
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.tokens
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.get_mut_or_create(serum_market.quote_token_index)?;
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quote_position.in_use_count += 1;
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let (base_position, _, _) = account
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.tokens
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.get_mut_or_create(serum_market.base_token_index)?;
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base_position.in_use_count += 1;
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Ok(())
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}
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fn cpi_init_open_orders(ctx: &Serum3CreateOpenOrders) -> Result<()> {
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use crate::serum3_cpi;
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let group = ctx.group.load()?;
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serum3_cpi::InitOpenOrders {
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program: ctx.serum_program.to_account_info(),
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market: ctx.serum_market_external.to_account_info(),
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open_orders: ctx.open_orders.to_account_info(),
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open_orders_authority: ctx.group.to_account_info(),
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rent: ctx.rent.to_account_info(),
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}
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.call(&group)
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}
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