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bsip38: rewording; add max_debt_to_cover formula

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abitmore 2018-04-10 13:56:55 -04:00
parent 3006bc8022
commit 37ca45b475
1 changed files with 16 additions and 8 deletions
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bsip-0038.md
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@ -82,6 +82,14 @@ max_amount_to_sell = (debt * target_CR - collateral * feed_price)
The result is a rational number, need to be rounded up to an integer.
Then, the maximum debt it wants to cover can be calculated as:
```
max_debt_to_cover = max_amount_to_sell * match_price
```
It need to be rounded up to an integer as well.
# Specifications
@ -143,14 +151,14 @@ The rule for matching a limit order with a call order need to be revised as
smaller and the short position will be closed after the match, round up its
paying amount;
* **otherwise,**
* **if `target_collateral_ratio` is set and it's receiving the maximum debt
amount calculated with `target_collateral_ratio`, see this order is smaller,
try to round up its paying amount;**
* **for edge cases, if its collateral ratio would not increase after being
partially filled due to the round-up (which may even cause a black swan
event in an extreme scenario), see `target_collateral_ratio` as not set for
this time, re-apply the filling rules for this match.**
* otherwise, round down its paying amount.
* **if the call order has `target_collateral_ratio` set and is receiving the
maximum debt amount calculated with `target_collateral_ratio`, see the call
order as smaller, try to round up its paying amount;**
* **for edge cases, if the call order's collateral ratio would not increase
after being partially filled due to the round-up (which may even cause a
black swan event in an extreme scenario), see its `target_collateral_ratio`
as "not set" for this time, re-apply the filling rules for this match.**
* otherwise, the call order is larger, round down its paying amount.
* if the limit order would receive nothing, cancel it (it's smaller,
so safe to cancel);
* otherwise, calculate the amount that the limit order would pay as