90 lines
2.9 KiB
Rust
90 lines
2.9 KiB
Rust
use anchor_lang::prelude::*;
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use crate::error::MangoError;
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use crate::state::*;
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#[derive(Accounts)]
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pub struct Serum3CloseOpenOrders<'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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// owner is checked at #1
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)]
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pub account: AccountLoader<'info, MangoAccountFixed>,
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pub owner: Signer<'info>,
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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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#[account(mut)]
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/// CHECK: Validated inline by checking against the pubkey stored in the account at #2
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pub open_orders: UncheckedAccount<'info>,
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#[account(mut)]
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/// CHECK: target for account rent needs no checks
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pub sol_destination: UncheckedAccount<'info>,
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}
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pub fn serum3_close_open_orders(ctx: Context<Serum3CloseOpenOrders>) -> Result<()> {
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//
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// Validation
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//
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let mut account = ctx.accounts.account.load_full_mut()?;
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// account constraint #1
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require!(
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account.fixed.is_owner_or_delegate(ctx.accounts.owner.key()),
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MangoError::SomeError
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);
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let serum_market = ctx.accounts.serum_market.load()?;
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// Validate open_orders #2
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require!(
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account
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.serum3_orders(serum_market.market_index)?
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.open_orders
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== ctx.accounts.open_orders.key(),
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MangoError::SomeError
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);
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//
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// close OO
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//
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cpi_close_open_orders(ctx.accounts)?;
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// Reduce the in_use_count on the token positions - they no longer need to be forced open.
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// We cannot immediately dust tiny positions because we don't have the banks.
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let (base_position, _) = account.token_position_mut(serum_market.base_token_index)?;
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base_position.in_use_count = base_position.in_use_count.saturating_sub(1);
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let (quote_position, _) = account.token_position_mut(serum_market.quote_token_index)?;
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quote_position.in_use_count = quote_position.in_use_count.saturating_sub(1);
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// Deactivate the serum open orders account itself
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account.deactivate_serum3_orders(serum_market.market_index)?;
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Ok(())
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}
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fn cpi_close_open_orders(ctx: &Serum3CloseOpenOrders) -> Result<()> {
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use crate::serum3_cpi;
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let group = ctx.group.load()?;
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serum3_cpi::CloseOpenOrders {
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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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sol_destination: ctx.sol_destination.to_account_info(),
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}
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.call(&group)
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}
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