add yuzu-money

Author: lucasgleba

src/adaptors/yuzu-money/index.js

@@ -0,0 +1,118 @@
+const sdk = require('@defillama/sdk');
+const utils = require('../utils');
+const axios = require('axios');
+
+const chain = 'plasma';
+
+const yzUSD = '0x6695c0f8706c5ace3bdf8995073179cca47926dc';
+const syzUSD = '0xc8a8df9b210243c55d31c73090f06787ad0a1bf6';
+
+const yzUSD_unit = 1e18;
+const syzUSD_unit = 1e18;
+
+const YEAR_IN_DAYS = 365;
+const DAY_IN_SECONDS = 24 * 60 * 60;
+
+const APY_REFERENCE_PERIOD_IN_DAYS = 7;
+
+const getUsdPrice = async () => {
+  try {
+    const priceKey = `${chain}:${syzUSD}`;
+    const { data } = await axios.get(`https://coins.llama.fi/prices/current/${priceKey}`);
+    return data.coins[priceKey].price;
+  } catch (error) {
+    console.error('Error fetching USD price:', error);
+    throw error;
+  }
+};
+
+const getTotalSupply = async () => {
+  try {
+    const { output } = await sdk.api.abi.call({
+      target: syzUSD,
+      abi: 'erc20:totalSupply',
+      chain,
+    });
+    return output / syzUSD_unit;
+  } catch (error) {
+    console.error('Error fetching total supply:', error);
+    throw error;
+  }
+};
+
+const getRedemptionPrice = async (blockNumber) => {
+  try {
+    const { output } = await sdk.api.abi.call({
+      target: syzUSD,
+      abi: 'function previewRedeem(uint256 shares) external view returns (uint256)',
+      params: [BigInt(syzUSD_unit)],
+      chain,
+      block: blockNumber,
+    });
+    return output / yzUSD_unit;
+  } catch (error) {
+    console.error('Error fetching redemption price:', error);
+    throw error;
+  }
+};
+
+const calculateUsdTvl = async () => {
+  try {
+    const totalSupply = await getTotalSupply();
+    const tokenPrice = await getUsdPrice();
+    return totalSupply * tokenPrice;
+  } catch (error) {
+    console.error('Error calculating USD TVL:', error);
+    throw error;
+  }
+};
+
+const calculateApy = async () => {
+  try {
+    const currentBlock = await sdk.api.util.getLatestBlock(chain);
+    const startTimestamp = currentBlock.timestamp - APY_REFERENCE_PERIOD_IN_DAYS * DAY_IN_SECONDS;
+    const [startBlock] = await utils.getBlocksByTime([startTimestamp], chain);
+
+    const [startPrice, currentPrice] = await Promise.all([getRedemptionPrice(startBlock), getRedemptionPrice(currentBlock.block)]);
+
+    const appreciationRatio = currentPrice / startPrice;
+    const apy = (Math.pow(appreciationRatio, YEAR_IN_DAYS / APY_REFERENCE_PERIOD_IN_DAYS) - 1) * 100;
+
+    return apy;
+  } catch (error) {
+    console.error('Error calculating APY:', error);
+    throw error;
+  }
+};
+
+const syzUSDPool = async () => {
+  try {
+    const [tvlUsd, apyBase] = await Promise.all([calculateUsdTvl(), calculateApy()]);
+    return {
+      tvlUsd,
+      apyBase,
+      pool: (`${syzUSD}-${chain}`).toLowerCase(),
+      chain: 'Plasma',
+      project: 'yuzu-money',
+      symbol: 'yzUSD',
+      underlyingTokens: [yzUSD],
+      url: 'https://app.yuzu.money/syzusd',
+    };
+  } catch (error) {
+    console.error('Error fetching pool data:', error);
+    throw error;
+  }
+};
+
+const apy = async () => {
+  try {
+    return [await syzUSDPool()];
+  } catch (error) {
+    console.error('Error fetching pools:', error);
+    throw error;
+  }
+};
+
+module.exports = {
+  apy,
+};