Add Kasu TVL adapter

projects/kasu/index.js

@@ -0,0 +1,69 @@
+const { cachedGraphQuery } = require('../helper/cache')
+const ADDRESSES = require('../helper/coreAssets.json')
+
+const GRAPH_URLS = {
+  base: {
+    uri:  'https://subgraph.satsuma-prod.com/3ed46ea711d3/kasu-finance--314476/kasu-base/api',
+    query: `{
+              lendingPools (where:{isStopped: false}){
+                id
+                balance
+              }
+            }`
+  },
+  plume: {
+    uri: 'https://api.goldsky.com/api/public/project_cm9t3064xeuyn01tgctdo3c17/subgraphs/kasu-plume/prod/gn',
+    query: `{
+              lendingPools {
+                id
+                balance
+              }
+            }`
+  }
+};
+
+const CHAIN_ASSET = {
+  base: {
+    asset: ADDRESSES.base.USDC,
+    decimals: 6
+  },
+  plume: {
+    asset: ADDRESSES.plume_mainnet.pUSD,
+    decimals: 6
+  },
+}
+
+function offChainPoolTVL(api, poolAddress) {
+  return api.call({
+    abi: 'function externalTVLOfPool(address) view returns (uint256)',
+    target: '0x662379FEBb3e4F91400B5f7d4f7F7ce4699F3c9F',
+    params: [poolAddress],
+  });
+}
+
+function tvl(chain) {
+  return async (api) => {
+    const result =  await cachedGraphQuery('kasu/' + chain, GRAPH_URLS[chain].uri, GRAPH_URLS[chain].query);
+    const tvl = result.lendingPools.map((pool => pool.balance)).reduce((a,b) => a + b * (10 ** CHAIN_ASSET[chain].decimals), 0);
+    let externalTvl = 0;
+    if (chain === 'base') {
+      //add externally managed TVL on Base
+      const externalTvlResults = await Promise.all(
+        result.lendingPools.map(async (pool) => Number(await offChainPoolTVL(api, pool.id)))
+      );
+      externalTvl = externalTvlResults.reduce((a, b) => a + b || 0, 0);
+    }
+    api.addTokens([CHAIN_ASSET[chain].asset], [tvl + externalTvl]);
+    return api.getBalances()
+  };
+}
+
+module.exports = {
+  methodology: 'Count all assets deposited to Kasu Lending Pools',
+  base: {
+    tvl: tvl('base'),
+  },
+  plume: {
+    tvl: tvl('plume'),
+  },
+};