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tcs: net borrow checks

This commit is contained in:
Christian Kamm 2023-08-11 17:02:02 +02:00
parent 1dd934f8ad
commit 7e804b228f
1 changed files with 8 additions and 4 deletions
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12
programs/mango-v4/src/instructions/token_conditional_swap_trigger.rs
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@ -275,10 +275,14 @@ fn action(
sell_bank.collected_fees_native += I80F48::from(maker_fee + taker_fee);
// No need to check net borrow limits on buy_bank or sell_bank, because this mostly transfers
// tokens between two accounts. For the sell token, the withdraw is higher than the deposit
// due to fees, so net borrows can technically increase a bit: but the difference gets "deposited"
// into collected_fees_native.
// Check net borrows on both banks.
//
// While tcs triggering doesn't cause actual tokens to leave the platform, it can increase the amount
// of borrows. For instance, if someone with USDC has a tcs to buy SOL and sell BTC, execution would
// create BTC borrows (unless the executor had BTC borrows that get repaid by the execution, but
// most executors will work on margin)
buy_bank.check_net_borrows(buy_token_price)?;
sell_bank.check_net_borrows(sell_token_price)?;
let post_liqee_sell_token = liqee_sell_token.native(&sell_bank);
let post_liqor_sell_token = liqor_sell_token.native(&sell_bank);