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feat: show liquidation price in margin modal #257

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feat: show liquidation price in margin modal #257

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49 changes: 29 additions & 20 deletions src/components/modals/EditMargin.svelte
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Original file line number Diff line number Diff line change
Expand Up @@ -7,12 +7,12 @@
import Button from '@components/layout/Button.svelte'
import LabelValue from '@components/layout/LabelValue.svelte'

import { ADDRESS_ZERO } from '@lib/config'
import { ADDRESS_ZERO, BPS_DIVIDER } from '@lib/config'
import { formatForDisplay } from '@lib/formatters'
import { approveAsset, getAllowance } from '@api/assets'
import { addMargin, removeMargin } from '@api/positions'
import { focusInput, hideModal } from '@lib/ui'
import { allowances, selectedMarketInfo } from '@lib/stores'
import { allowances, marketInfos } from '@lib/stores'

export let data;

Expand Down Expand Up @@ -55,38 +55,43 @@
let funding = data.funding || 0;
let newLiqPrice = data.position.liqprice;
let newMargin = 0;
function getLiquidationPrice(nextMargin) {
const liqThreshold = ($marketInfos[data.position.market]?.liqThreshold || BPS_DIVIDER) / BPS_DIVIDER;
const basePrice = data.position.price * 1;
const positionSize = data.position.size * 1;
if (!positionSize) return data.position.liqprice;

let liqPrice;
if (data.position.isLong) {
liqPrice = basePrice - liqThreshold * nextMargin * basePrice / positionSize;
} else {
liqPrice = basePrice + liqThreshold * nextMargin * basePrice / positionSize;
}
return liqPrice < 0 ? 0 : liqPrice;
}

function calculateNewLiquidationPrice(marginDelta, mode) {

if (!marginDelta) marginDelta = 0;
marginDelta = marginDelta * 1 || 0;
const currentMargin = data.position.margin * 1 + funding * 1;

if (mode == 'Add') {
newMargin = ((data.position.margin*1 + funding*1) + marginDelta);

if (data.position.isLong) {
newLiqPrice = data.position.price * 1 - newMargin * data.position.price / data.position.size;
} else {
newLiqPrice = data.position.price * 1 + newMargin * data.position.price / data.position.size;
}
if (newLiqPrice < 0) newLiqPrice = 0;
newMargin = currentMargin + marginDelta;
} else {
if (marginDelta >= (data.position.margin*1 + funding*1)) {
if (marginDelta >= currentMargin) {
newMargin = 0;
margin = (data.position.margin*1 + funding*1);
} else {
newMargin = ((data.position.margin*1 + funding*1) - marginDelta);
}
if (data.position.isLong) {
newLiqPrice = data.position.price * 1 - ((data.position.margin*1 + funding*1) - marginDelta) * data.position.price / data.position.size;
margin = currentMargin;
} else {
newLiqPrice = data.position.price * 1 + ((data.position.margin*1 + funding*1 - marginDelta)) * data.position.price / data.position.size;
newMargin = currentMargin - marginDelta;
}
}
newLiqPrice = getLiquidationPrice(newMargin);
calculateNewLeverage();
}

let newLeverage = 0;
function calculateNewLeverage() {
newLeverage = data.position.size / newMargin;
newLeverage = newMargin > 0 ? data.position.size / newMargin : 0;
}

$: calculateNewLiquidationPrice(margin, selected)
Expand Down Expand Up @@ -151,6 +156,10 @@
<Input label={`${selected} ${data.position.asset}`} bind:value={margin} />
</div>

<div class='row'>
<LabelValue label='Current Liq. Price' value={`${formatForDisplay(data.position.liqprice) || "-"}`} />
</div>

<div class='row'>
<LabelValue label='New Liq. Price' value={`${formatForDisplay(newLiqPrice) || "-"}`} />
</div>
Expand Down