Apy dexfinance farms

src/adaptors/dexfinance-arbitrum/abi/FARM.js

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+const FARM = [
+	{
+		'inputs': [
+		  {
+			'internalType': 'address',
+			'name': '',
+			'type': 'address'
+		  }
+		],
+		'name': 'sharePerTimeUnit',
+		'outputs': [
+		  {
+			'internalType': 'uint256',
+			'name': '',
+			'type': 'uint256'
+		  }
+		],
+		'stateMutability': 'view',
+		'type': 'function'
+	},
+]
+
+module.exports = {
+  FARM
+}

src/adaptors/dexfinance-arbitrum/abi/LP.js

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+const LP_ABI = [
+	{
+		'constant': true,
+		'inputs': [],
+		'name': 'getReserves',
+		'outputs': [
+			{
+				'internalType': 'uint112',
+				'name': '_reserve0',
+				'type': 'uint112'
+			},
+			{
+				'internalType': 'uint112',
+				'name': '_reserve1',
+				'type': 'uint112'
+			},
+			{
+				'internalType': 'uint32',
+				'name': '_blockTimestampLast',
+				'type': 'uint32'
+			}
+		],
+		'payable': false,
+		'stateMutability': 'view',
+		'type': 'function'
+	},
+	{
+		'constant': true,
+		'inputs': [],
+		'name': 'totalSupply',
+		'outputs': [
+			{
+				'internalType': 'uint256',
+				'name': '',
+				'type': 'uint256'
+			}
+		],
+		'payable': false,
+		'stateMutability': 'view',
+		'type': 'function'
+	}
+]
+
+module.exports = {
+  LP_ABI,
+}

src/adaptors/dexfinance-arbitrum/index.js

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+const sdk = require('@defillama/sdk');
+const BigNumber = require('bignumber.js');
+const { LP_ABI } = require('./abi/LP');
+const { FARM } = require('./abi/FARM');
+const utils = require('../utils');
+
+
+const TOKENS = {
+  GDEX: '0x92a212d9f5eef0b262ac7d84aea64a0d0758b94f',
+  USDEX: '0x4117ec0a779448872d3820f37ba2060ae0b7c34b',
+}
+const SECONDS_IN_YEAR = 24 * 60 * 60 * 365;
+const pairsDexswap = [
+  {
+    name: 'USDEX+/USDC',
+    address: '0x24129a6c5b700435cc0d1bd3500796f3fb9ebd49',
+  },
+  {
+    name: 'USDEX+/gDEX',
+    address: '0x0e75ca30b075aa0df8c360e30cd0ed26ed62432a',
+  }
+];
+
+const originFarms = [
+  {
+    symbol: 'GDEX',
+    origin: '0xde1e437e0be59b596e69ff58e2bda9209a72ce8b',
+    stakingToken: '0x92a212d9f5eef0b262ac7d84aea64a0d0758b94f',
+    connector: '0x0b8905bb2ab1bae7b081d5b8cc9d906f01dd3b82',
+    rewardToken: '0x4117ec0a779448872d3820f37ba2060ae0b7c34b',
+  },
+  {
+    symbol: 'USDEX+/GDEX',
+    origin: '0x74337fb8381ce8c323110cef2e041d0f2220a2ce',
+    stakingToken: '0x0e75ca30b075aa0df8c360e30cd0ed26ed62432a',
+    connector: '0xa7fbbdf114f1f2218825a500515b6bf7d49c1b2c',
+    rewardToken: '0x4117ec0a779448872d3820f37ba2060ae0b7c34b',
+  }
+]
+
+PROJECT_SLUG = 'dexfinance-arbitrum';
+
+async function getDexSwapPrices() {
+  const lpInfo = [];
+  for (const pair of pairsDexswap) {
+    const { output: reserves } = await sdk.api.abi.call({
+      target: pair.address,
+      abi: LP_ABI[0],
+      chain: 'arbitrum',
+    })
+    const { output: totalSupply } = await sdk.api.abi.call({
+      target: pair.address,
+      abi: LP_ABI[1],
+      chain: 'arbitrum',
+    })
+    lpInfo.push({ ...reserves, totalSupply });
+  }
+  const [lpInfo0, lpInfo1] = lpInfo;
+  const usdcWithoutDecimalsBN = new BigNumber(lpInfo0['1']).div(10 ** 6);
+  const usdexPair0PlusWithoutDecimalsBN = new BigNumber(lpInfo0['0']).div(10 ** 18);
+  const gdexWithoutDecimalsBN = new BigNumber(lpInfo1['1']).div(10 ** 18);
+  const usdexPair1PlusWithoutDecimalsBN = new BigNumber(lpInfo1['0']).div(10 ** 18);
+  const usdexPriceUsd = usdcWithoutDecimalsBN.div(usdexPair0PlusWithoutDecimalsBN).toString();
+  const totalPriceToGdexPairBN = gdexWithoutDecimalsBN.times(usdexPriceUsd);
+  const priceGdexBN = usdexPair1PlusWithoutDecimalsBN.div(totalPriceToGdexPairBN);
+
+  const totalSupplyBN = new BigNumber(lpInfo1.totalSupply).div(10 ** 18);
+  const priceLpGdexUsdex = usdexPair1PlusWithoutDecimalsBN.times(usdexPriceUsd).plus(priceGdexBN.times(gdexWithoutDecimalsBN)).div(totalSupplyBN).toString();
+  return {
+    [TOKENS.GDEX]: priceGdexBN.toString(),
+    [TOKENS.USDEX]: usdexPriceUsd,
+    [pairsDexswap[1].address]: priceLpGdexUsdex,
+  }
+
+}
+
+async function getGdexFarmsApy() {
+  const prices = await getDexSwapPrices();
+  const res = [];
+  for (const origin of originFarms) {
+    const { output: balance } = await sdk.api.abi.call({ chain: 'arbitrum', abi: 'erc20:balanceOf', target: origin.stakingToken, params: origin.origin });
+    const tvlUsd = new BigNumber(balance).div(10 ** 18).times(prices[origin.stakingToken]).toNumber();
+    const { output: sharePerTimeUnit } = await sdk.api.abi.call({
+      target: origin.connector,
+      chain: 'arbitrum',
+      abi: FARM[0],
+      params: [origin.rewardToken],
+    });
+    const rewardsPerSecondUsdBN = new BigNumber(sharePerTimeUnit).div(10 ** 18).times(prices[origin.rewardToken]).times(100);
+    const rewardPerYearUsdBN = rewardsPerSecondUsdBN.times(SECONDS_IN_YEAR);
+    const apy = rewardPerYearUsdBN.div(tvlUsd).toNumber();
+    res.push({
+      pool: origin.origin,
+      chain: utils.formatChain('arbitrum'),
+      project: PROJECT_SLUG,
+      symbol: origin.symbol,
+      tvlUsd,
+      apy,
+      url: 'https://www.dexfinance.com/',
+    })
+  }
+  return res;
+}
+
+module.exports = {
+  apy: getGdexFarmsApy,
+};