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Fix pool performance metrics for bounded periods #247

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Fix pool performance metrics for bounded periods #247

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25 changes: 17 additions & 8 deletions src/lib/stores.js
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Original file line number Diff line number Diff line change
Expand Up @@ -70,22 +70,31 @@ export const totalSupplyCAP = writable(0);
export const CAPStake = writable(0);

// Pool performance stats (including fees)
function numericStatValue(value) {
const number = value * 1;
return Number.isFinite(number) ? number : 0;
}

function getPoolPerformance(stats, latestIndex, oldestIndex) {
if (!stats) return;
let perf = {};
for (const assetLabel in stats) {
let data = stats[assetLabel]; // array
if (!data.length) continue;
if (oldestIndex >= data.length) {
oldestIndex = data.length - 1;
const boundedOldestIndex = Math.min(oldestIndex, data.length - 1);
const boundedLatestIndex = Math.min(latestIndex, boundedOldestIndex);
const periodStats = data.slice(boundedLatestIndex, boundedOldestIndex + 1);
if (!periodStats.length) {
continue;
}
let oldestStat = formatPoolStat(data[oldestIndex]);
let oldestStat = formatPoolStat(data[boundedOldestIndex]);
// startingBalance allows you to calculate performance
let startingBalance = oldestStat.startingBalance;
let latestStat = formatPoolStat(data[latestIndex]);
let totalDeposits = data.reduce((sum, item) => sum + (item.deposits || 0), 0);
let totalWithdrawals = data.reduce((sum, item) => sum + (item.withdrawals || 0), 0);
perf[assetLabel] = latestStat.balance == 0 ? 0 : (latestStat.balance - startingBalance - (totalDeposits || 0) + (totalWithdrawals || 0)) / latestStat.balance;
let startingBalance = numericStatValue(oldestStat.startingBalance);
let latestStat = formatPoolStat(data[boundedLatestIndex]);
let latestBalance = numericStatValue(latestStat.balance);
let totalDeposits = periodStats.reduce((sum, item) => sum + numericStatValue(item.deposits), 0);
let totalWithdrawals = periodStats.reduce((sum, item) => sum + numericStatValue(item.withdrawals), 0);
perf[assetLabel] = latestBalance == 0 ? 0 : (latestBalance - startingBalance - totalDeposits + totalWithdrawals) / latestBalance;
}
return perf;
}
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