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fix: add decimal correction factor for mixed-decimal pool reserves

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HEZ-USDT pool has mixed decimals (12 vs 6). The LP formula
LP = sqrt(r0 * r1) requires correction factor 10^(12-(d0+d1)/2)
to properly estimate reserves in human units.

- HEZ-USDT: factor = 1000 (fixes 1000x undercount)
- HEZ-PEZ: factor = 1 (no change needed)
This commit is contained in:
Kurdistan Tech Ministry
2026-02-05 02:20:21 +03:00
parent 1a82323cd4
commit cef46b373b
1 changed files with 21 additions and 19 deletions
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web/src/components/TokenSwap.tsx
+21 -19
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@@ -282,30 +282,32 @@ const TokenSwap = () => {
}
// Estimate reserves using correct decimals for each asset
// For mixed-decimal pools (e.g., HEZ-12 decimals, USDT-6 decimals),
// we need to normalize to human-readable units
// LP = sqrt(r0 * r1) where r0/r1 are in smallest units
// The price from API is already normalized to human units
// To estimate reserves in human-readable units:
// We know: price = reserve1_human / reserve0_human
// And: LP = sqrt(reserve0_raw * reserve1_raw)
// LP = sqrt(r0_raw * r1_raw) where r0/r1 are in smallest units
//
// For simplicity, we'll estimate reserves based on LP supply and price
// reserve0_human = sqrt(LP_raw^2 / price) / 10^decimals0
// But this is complex with mixed decimals, so use a simpler approach:
// Just use the price for rate calculation, and estimate a reasonable reserve size
// Mathematical derivation for mixed-decimal pools:
// r0_raw = r0_human * 10^d0, r1_raw = r1_human * 10^d1
// LP_raw = sqrt(r0_human * 10^d0 * r1_human * 10^d1)
// = sqrt(r0_human * r1_human) * 10^((d0+d1)/2)
//
// LP tokens have 12 decimals, so:
// LP_human = LP_raw / 10^12 = sqrt(r0_human * r1_human) * 10^((d0+d1)/2 - 12)
//
// Therefore: sqrt(r0_human * r1_human) = LP_human * 10^(12 - (d0+d1)/2)
//
// For HEZ-USDT (d0=12, d1=6): factor = 10^(12 - 9) = 1000
// For HEZ-PEZ (d0=12, d1=12): factor = 10^(12 - 12) = 1
// Use LP supply to estimate pool TVL, then derive reserves from price
const lpHuman = Number(lpSupply) / Math.pow(10, 12); // LP tokens have 12 decimals
const decimalCorrectionFactor = Math.pow(10, 12 - (decimals0 + decimals1) / 2);
// Estimate reserve0 (first asset) in human units
// Since LP ≈ sqrt(r0 * r1) and r1/r0 = price
// LP^2 ≈ r0 * r1 = r0 * (r0 * price) = r0^2 * price
// r0 ≈ LP / sqrt(price)
// Now estimate reserves:
// sqrt(r0_human * r1_human) = LP_human * decimalCorrectionFactor
// price = r1_human / r0_human
// r0_human = sqrt(r0_human * r1_human) / sqrt(price) = LP_human * factor / sqrt(price)
// r1_human = sqrt(r0_human * r1_human) * sqrt(price) = LP_human * factor * sqrt(price)
const sqrtPrice = Math.sqrt(price);
const reserve0 = lpHuman / sqrtPrice;
const reserve1 = lpHuman * sqrtPrice;
const reserve0 = lpHuman * decimalCorrectionFactor / sqrtPrice;
const reserve1 = lpHuman * decimalCorrectionFactor * sqrtPrice;
if (import.meta.env.DEV) console.log('✅ Estimated reserves (human units):', {
reserve0,