add blend pool yields (#1600)

* add blend pool yields * scale apr to percentage * specify pools to load to reduce rpc usage and filter for single asset with highest apr amongst pools * add pool id to poolMeta --------- Co-authored-by: Ryang-21 <[email protected]>
DefiLlama · Dec 17, 2024 · b2e3648 · b2e3648
1 parent 515342e
commit b2e3648
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Showing 3 changed files with 252 additions and 12 deletions.
diff --git a/src/adaptors/blend-pools/index.js b/src/adaptors/blend-pools/index.js
@@ -0,0 +1,101 @@
+const {
+  Pool,
+  BackstopToken,
+  Backstop,
+  FixedMath,
+} = require('@blend-capital/blend-sdk');
+const { getPrices, keepFinite, formatChain } = require('../utils');
+
+const BACKSTOP_ID = 'CAO3AGAMZVRMHITL36EJ2VZQWKYRPWMQAPDQD5YEOF3GIF7T44U4JAL3';
+const BLND_ID = 'CD25MNVTZDL4Y3XBCPCJXGXATV5WUHHOWMYFF4YBEGU5FCPGMYTVG5JY';
+const BLEND_POOLS = [
+  'CDVQVKOY2YSXS2IC7KN6MNASSHPAO7UN2UR2ON4OI2SKMFJNVAMDX6DP',
+  'CBP7NO6F7FRDHSOFQBT2L2UWYIZ2PU76JKVRYAQTG3KZSQLYAOKIF2WB',
+];
+const NETWORK = {
+  rpc: 'https://soroban-rpc.creit.tech/',
+  passphrase: 'Public Global Stellar Network ; September 2015',
+};
+
+const getApy = async (poolId, backstop) => {
+  const pool = await Pool.load(NETWORK, poolId);
+  // Skip pools that have been admin frozen - Pool is very likely to be broken
+  if (pool.config.status === 4) return [];
+  const prices = await getPrices(pool.config.reserveList, 'stellar');
+  let pools = [];
+  for (const reserve of pool.reserves.values()) {
+    const price = prices.pricesByAddress[reserve.assetId.toLowerCase()];
+    if (price) {
+      let supplyEmissionsPerAsset = reserve.emissionsPerYearPerSuppliedAsset();
+      let borrowEmissionsPerAsset = reserve.emissionsPerYearPerBorrowedAsset();
+      let supplyEmissionsAPR = undefined;
+      let borrowEmissionsAPR = undefined;
+      // The backstop token is an 80/20 weighted lp token of blnd and usdc respectively
+      // (Calculated using balancer spot equation)
+      // @TODO replace with coingecko price after listing
+      const usdcPerBlnd =
+        FixedMath.toFloat(backstop.backstopToken.usdc, 7) /
+        0.2 /
+        (FixedMath.toFloat(backstop.backstopToken.blnd, 7) / 0.8);
+      if (supplyEmissionsPerAsset > 0) {
+        supplyEmissionsAPR = (supplyEmissionsPerAsset * usdcPerBlnd) / price;
+      }
+      if (borrowEmissionsPerAsset > 0) {
+        borrowEmissionsAPR = (borrowEmissionsPerAsset * usdcPerBlnd) / price;
+      }
+      // Estimate borrow APY compoumded daily
+      const borrowApy = (1 + reserve.borrowApr / 365) ** 365 - 1;
+      let totalSupply = reserve.totalSupplyFloat() * price;
+      let totalBorrow = reserve.totalLiabilitiesFloat() * price;
+
+      const url = `https://mainnet.blend.capital/dashboard/?poolId=${poolId}`;
+
+      pools.push({
+        pool: `${reserve.assetId}-stellar`.toLowerCase(),
+        chain: formatChain('stellar'),
+        project: 'blend-pools',
+        symbol: reserve.tokenMetadata.symbol,
+        tvlUsd: totalSupply - totalBorrow,
+        // Supply is kept as APR to prevent overestimation of APY
+        apyBase: reserve.supplyApr * 100,
+        apyReward: supplyEmissionsAPR * 100,
+        underlyingTokens: [reserve.assetId],
+        rewardTokens: borrowEmissionsAPR || supplyEmissionsAPR ? [BLND_ID] : [],
+        totalSupplyUsd: totalSupply,
+        totalBorrowUsd: totalBorrow,
+        apyBaseBorrow: borrowApy * 100,
+        apyRewardBorrow: borrowEmissionsAPR * 100,
+        ltv: totalBorrow / totalSupply,
+        poolMeta: `Pool ID: ${pool.id}`,
+        url,
+      });
+    }
+  }
+  return pools;
+};
+
+const apy = async () => {
+  let backstop = await Backstop.load(NETWORK, BACKSTOP_ID);
+  let pools = [];
+
+  for (const poolId of BLEND_POOLS) {
+    let poolApys = await getApy(poolId, backstop);
+    for (const poolApy of poolApys) {
+      if (poolApy) {
+        let index = pools.findIndex((pool) => pool.pool == poolApy.pool);
+        if (index !== -1) {
+          if (poolApy.apyReward > pools[index].apyReward) {
+            pools[index] = poolApy;
+          }
+        } else {
+          pools.push(poolApy);
+        }
+      }
+    }
+  }
+  return pools;
+};
+
+module.exports = {
+  apy,
+};
diff --git a/src/adaptors/package-lock.json b/src/adaptors/package-lock.json
diff --git a/src/adaptors/package.json b/src/adaptors/package.json
@@ -7,7 +7,11 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "@blend-capital/blend-sdk": "^2.1.1",
     "@defillama/sdk": "^5.0.60",
+    "@stacks/network": "^6.13.0",
+    "@stacks/transactions": "^6.15.0",
+    "@ton/ton": "14.0.0",
     "@types/jest": "^28.1.6",
     "@uniswap/sdk-core": "^5.3.0",
     "@uniswap/v3-sdk": "^3.13.0",
@@ -24,10 +28,7 @@
     "lodash": "^4.17.21",
     "node-fetch": "^2.6.1",
     "superagent": "^6.1.0",
-    "web3": "^4.9.0",
-    "@ton/ton": "14.0.0",
-    "@stacks/network": "^6.13.0",
-    "@stacks/transactions": "^6.15.0"
+    "web3": "^4.9.0"
   },
   "devDependencies": {
     "jest": "^28.1.3",