adding kaspacom-dex yields

Author: giladm11

src/adaptors/kaspacom-dex/index.js

@@ -0,0 +1,189 @@
+const axios = require('axios');
+const { request, gql } = require('graphql-request');
+const { chunk } = require('lodash');
+
+const utils = require('../utils');
+
+const SUBGRAPH_URL =
+  'https://graph-kasplex.kaspa.com/subgraphs/name/kasplex-kas-v2-core';
+const CHAIN = 'kasplex';
+const FEE_RATE = 0.01;
+const PAGE_SIZE = 1000;
+const DAY_IN_SECONDS = 86400;
+
+const PAIRS_QUERY = gql`
+  query getPairs($first: Int!, $skip: Int!) {
+    pairs(
+      first: $first
+      skip: $skip
+      orderBy: reserveKAS
+      orderDirection: desc
+    ) {
+      id
+      token0 {
+        id
+        symbol
+      }
+      token1 {
+        id
+        symbol
+      }
+      reserveKAS
+      trackedReserveKAS
+      reserve0
+      reserve1
+      volumeKAS
+    }
+  }
+`;
+
+const PAIR_DAY_DATA_QUERY = gql`
+  query getPairDayData($pairAddresses: [Bytes!]!, $startTime: Int!) {
+    pairDayDatas(
+      first: 1000
+      orderBy: date
+      orderDirection: desc
+      where: { pairAddress_in: $pairAddresses, date_gt: $startTime }
+    ) {
+      date
+      pairAddress
+      dailyVolumeKAS
+    }
+  }
+`;
+
+const fetchKasPrice = async () => {
+  try {
+    const { data } = await axios.get('https://api.kaspa.org/info/price');
+    const price = Number(data.price);
+    if (Number.isFinite(price) && price > 0) return price;
+  } catch (error) {
+    console.log('Kas price from API failed, falling back to DefiLlama', error);
+  }
+
+  return 0;
+};
+
+const fetchPairs = async () => {
+  const pairs = [];
+  let skip = 0;
+
+  while (true) {
+    const { pairs: page } = await request(SUBGRAPH_URL, PAIRS_QUERY, {
+      first: PAGE_SIZE,
+      skip,
+    });
+    pairs.push(...page);
+    if (page.length < PAGE_SIZE) break;
+    skip += PAGE_SIZE;
+  }
+
+  return pairs;
+};
+
+const fetchPairDayData = async (pairIds) => {
+  if (pairIds.length === 0) return { daily: {}, weekly: {} };
+
+  const startWeek = Math.floor(Date.now() / 1000) - 7 * DAY_IN_SECONDS;
+  const volumes = {};
+  const latestDaily = {};
+
+  for (const batch of chunk(pairIds, 75)) {
+    const { pairDayDatas } = await request(SUBGRAPH_URL, PAIR_DAY_DATA_QUERY, {
+      pairAddresses: batch,
+      startTime: startWeek,
+    });
+
+    pairDayDatas.forEach((entry) => {
+      const pairAddress = entry.pairAddress?.toLowerCase();
+      const volumeKas = Number(entry.dailyVolumeKAS);
+      if (!pairAddress || !Number.isFinite(volumeKas)) return;
+
+      if (!volumes[pairAddress]) {
+        volumes[pairAddress] = 0;
+      }
+      volumes[pairAddress] += volumeKas;
+
+      if (
+        !latestDaily[pairAddress] ||
+        entry.date > latestDaily[pairAddress].date
+      ) {
+        latestDaily[pairAddress] = {
+          date: entry.date,
+          volumeKas,
+        };
+      }
+    });
+  }
+
+  return {
+    daily: Object.fromEntries(
+      Object.entries(latestDaily).map(([pair, { volumeKas }]) => [
+        pair,
+        volumeKas,
+      ])
+    ),
+    weekly: volumes,
+  };
+};
+
+const buildPools = (pairs, volumeData, kasPrice) => {
+  const { daily, weekly } = volumeData;
+
+  return pairs
+    .map((pair) => {
+      const pairId = pair.id.toLowerCase();
+      const kasReserve =
+        Number(pair.trackedReserveKAS ?? pair.reserveKAS ?? 0) || 0;
+      if (!(Number.isFinite(kasReserve) && kasReserve > 10000)) return null;
+      const tvlUsd = kasReserve * kasPrice;
+
+      const volumeKas1d = daily[pairId] ?? 0;
+      const volumeKas7d = weekly[pairId] ?? 0;
+
+      const volumeUsd1d = volumeKas1d * kasPrice;
+      const volumeUsd7d = volumeKas7d * kasPrice;
+
+      const apyBase =
+        tvlUsd > 0 ? ((volumeUsd1d * FEE_RATE * 365) / tvlUsd) * 100 : 0;
+      const apyBase7d =
+        tvlUsd > 0 ? ((volumeUsd7d * FEE_RATE * 52) / tvlUsd) * 100 : 0;
+
+      const symbol = utils.formatSymbol(
+        `${pair.token0.symbol}-${pair.token1.symbol}`
+      );
+
+      return {
+        pool: `${pair.id}-${CHAIN}`,
+        chain: CHAIN,
+        project: 'kaspacom-dex',
+        symbol,
+        tvlUsd,
+        apyBase,
+        apyBase7d,
+        volumeUsd1d,
+        volumeUsd7d,
+        underlyingTokens: [pair.token0.id, pair.token1.id],
+        url: 'https://defi.kaspacom.com',
+      };
+    })
+    .filter((pool) => pool && utils.keepFinite(pool));
+};
+
+const apy = async () => {
+  const [pairs, kasPrice] = await Promise.all([fetchPairs(), fetchKasPrice()]);
+  if (!pairs.length || !Number.isFinite(kasPrice) || kasPrice <= 0) {
+    return [];
+  }
+
+  const pairIds = pairs.map((pair) => pair.id.toLowerCase());
+  const volumeData = await fetchPairDayData(pairIds);
+
+  return buildPools(pairs, volumeData, kasPrice);
+};
+
+module.exports = {
+  timetravel: false,
+  apy,
+  url: 'https://defi.kaspacom.com',
+};