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sdk: sync-ref-price-logic-w-prgm #2043

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Merged
lowkeynicc merged 2 commits into from
Dec 1, 2025
Merged

sdk: sync-ref-price-logic-w-prgm #2043

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8bc6400
sdk: sync-ref-price-logic-w-prgm
0xbigz Nov 27, 2025
a106171
sync max/min offset logic
0xbigz Dec 1, 2025
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24 changes: 11 additions & 13 deletions sdk/src/math/amm.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -503,16 +503,10 @@ export function calculateReferencePriceOffset(
.mul(PRICE_PRECISION)
.div(reservePrice);

const inventoryPct = clampBN(
liquidityFraction.mul(new BN(maxOffsetPct)).div(PERCENTAGE_PRECISION),
new BN(maxOffsetPct).mul(new BN(-1)),
new BN(maxOffsetPct)
);

// Only apply when inventory is consistent with recent and 24h market premium
let offsetPct = markPremiumAvgPct.add(inventoryPct);
let offsetPct = markPremiumAvgPct.mul(liquidityFraction.abs()).divn(2);

if (!sigNum(inventoryPct).eq(sigNum(markPremiumAvgPct))) {
if (!sigNum(liquidityFraction).eq(sigNum(markPremiumAvgPct))) {
offsetPct = ZERO;
}

Expand Down Expand Up @@ -1032,11 +1026,15 @@ export function calculateSpreadReserves(
let maxOffset = 0;
let referencePriceOffset = 0;
if (amm.curveUpdateIntensity > 100) {
maxOffset = Math.max(
amm.maxSpread / 2,
(PERCENTAGE_PRECISION.toNumber() / 10000) *
(amm.curveUpdateIntensity - 100)
);
if (amm.curveUpdateIntensity == 200) {
maxOffset = Math.max(amm.maxSpread / 2, 10_000);
} else {
maxOffset = Math.min(
amm.maxSpread / 2,
(PERCENTAGE_PRECISION.toNumber() / 10000) *
(amm.curveUpdateIntensity - 100)
);
}

const liquidityFraction =
calculateInventoryLiquidityRatioForReferencePriceOffset(
Expand Down
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