feat: add yield adapter for DAOLama protocol

src/adaptors/daolama/index.js

@@ -0,0 +1,145 @@
+const { TonClient } = require('@ton/ton');
+const { Address, Cell, Slice, Dictionary, beginCell } = require('@ton/core');
+const utils = require('../utils');
+const PROTOCOL_FEE_BITS = 16;
+const PROTOCOL_FEE_BASE = 1000;
+
+function parseAssetConfig(assetConfigCell) {
+    const assetConfigSlice = assetConfigCell.beginParse();
+
+    return {
+        supplyAmountMax: assetConfigSlice.loadCoins(),
+        protocolFee: assetConfigSlice.loadUint(PROTOCOL_FEE_BITS) / PROTOCOL_FEE_BASE,
+    }
+}
+
+function parsePoolData(dataBOC) {
+    const dataSlice = Cell.fromBase64(dataBOC).beginParse();
+
+    dataSlice.loadRef()
+    const { protocolFee: protocolFeeRate, supplyAmountMax } = parseAssetConfig(dataSlice.loadRef());
+    const halted = dataSlice.loadBit();
+    const balance = dataSlice.loadCoins();
+    const borrowed = dataSlice.loadCoins();
+    const lpJettonSupply = dataSlice.loadCoins();
+    return {
+        halted,
+        balance,
+        borrowed,
+        lpJettonSupply,
+        protocolFeeRate,
+        supplyAmountMax,
+    }
+}
+
+async function getContractStateWithRetry(client, address, maxRetries = 3, initialDelay = 500) {
+  let attempts = 0;
+
+  while (attempts < maxRetries) {
+    try {
+      return await client.getContractState(address);
+    } catch (err) {
+      if (err.message?.includes('429') || err.code === 429) {
+        attempts++;
+        const delay = initialDelay * 2 ** (attempts - 1);
+        console.warn(
+          `Rate limit (429) encountered. Retrying in ${delay} ms... (attempt ${attempts} of ${maxRetries})`
+        );
+        await new Promise((resolve) => setTimeout(resolve, delay));
+      } else {
+        throw err;
+      }
+    }
+  }
+
+  throw new Error(`Max retries (${maxRetries}) exceeded while getting contract state for address ${address}.`);
+}
+
+async function getPoolData(
+    client,
+    poolAddress,
+    token,
+    tokenSymbol,
+    price,
+    scale,
+    poolName,
+    borrowRate
+) {
+    let data;
+    try {
+        const result = await getContractStateWithRetry(
+            client,
+            Address.parse(poolAddress),
+            5, // maxRetries
+            500 // initialDelay in ms
+        );
+        if (!result?.data) {
+            throw new Error('Master data not found');
+        }
+
+        data = parsePoolData(result.data.toString('base64'));
+    } catch (error) {
+        console.error('getPoolData error:', error);
+        return;
+    }
+
+    const totalSupply = Number(data.balance + data.borrowed) / scale;
+    const totalBorrow = Number(data.borrowed) / scale;
+    const totalSupplyUsd = (totalSupply * price);
+    const totalBorrowUsd = (totalBorrow * price);
+    const utilization =  totalSupply > 0 ? totalBorrow / totalSupply : 0;
+    const supplyRate = borrowRate * utilization * (1 - data.protocolFeeRate);
+    const supplyApy = (1 + supplyRate) ** 365 - 1;
+    const borrowApy = (1 + borrowRate) ** 365 - 1;
+
+    console.log(poolName, tokenSymbol, 'totalSupplyInUsd', totalSupplyUsd);
+    console.log(poolName, tokenSymbol, 'totalBorrowInUsd', totalBorrowUsd);
+    console.log(poolName, tokenSymbol, 'supplyApy', supplyApy * 100);
+    console.log(poolName, tokenSymbol, 'borrowApy', borrowApy * 100);
+
+    return {
+      pool: `daolama-${poolAddress}-${poolName}-ton`.toLowerCase(),
+      chain: 'Ton',
+      project: 'daolama',
+      symbol: tokenSymbol,
+      tvlUsd: totalSupplyUsd - totalBorrowUsd,
+      apyBase: supplyApy * 100,
+      apyBaseBorrow: borrowApy * 100,
+      underlyingTokens: [token],
+      totalSupplyUsd,
+      totalBorrowUsd,
+      poolMeta: poolName,
+      url: `https://app.daolama.co/yield`,
+    };
+}
+
+async function getApy() {
+    const TON = 'ton:EQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAM9c';
+    const price = async (token) => (await utils.getData(`https://coins.llama.fi/prices/current/${token}`)).coins[token].price;
+    const tonPrice = await price(TON);
+    const borrowRate = (await utils.getData('https://api.daolama.co/api/v1/analytics/borrowed/rate')).value;
+    const client = new TonClient({
+        endpoint: 'https://toncenter.com/api/v2/jsonRPC',
+    });
+
+    const poolData = await Promise.all([
+      getPoolData(
+        client,
+        'EQCkeTvOSTBwBtP06X2BX7THj_dlX67PhgYRGuKfjWtB9FVb',
+        'EQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAM9c',
+        'TON',
+        tonPrice,
+        1e9,
+        'Main',
+        borrowRate,
+      ),
+    ]);
+
+    return poolData.filter((pool) => pool !== undefined);
+}
+
+module.exports = {
+    timetravel: false,
+    apy: getApy,
+    url: 'https://daolama.co/',
+};