Add BIM tvl adapter (DefiLlama#15371)

Author: noeroumeas

projects/bim/index.js

@@ -0,0 +1,62 @@
+const utils = require('../helper/utils');
+const { toUSDTBalances } = require('../helper/balances');
+
+const vaultEndpointBase = 'https://raw.githubusercontent.com/bim-finance-org/staking-vaults/master/';
+const chainVaultEndpoints = {
+  10: vaultEndpointBase + "optimism.json",
+  100: vaultEndpointBase + "gnosis.json",
+  137: vaultEndpointBase + "polygon.json",
+  8453: vaultEndpointBase + "base.json",
+};
+
+const chains = {
+  xdai: 100,
+  polygon: 137,
+  base: 8453,
+  optimism: 10,
+}
+
+const getVaultBalances = async (chainId, vaults, api) => {
+  if (!vaults) {
+    throw new Error(`getVaultBalances: undefined vaults passed for ${chainId}`);
+  }
+  const calls = vaults.map(vault => {
+    return api.call({
+      abi: {
+        inputs: [],
+        name: 'balance',
+        outputs: [{ internalType: 'uint256', name: '', type: 'uint256' }],
+        stateMutability: 'view',
+        type: 'function',
+      },
+      target: vault.earnedTokenAddress,
+    });
+  });
+  const res = await Promise.all(calls);
+  return res;
+};
+
+function fetchChain(chainId) {
+  return async (_, _b, _cb, { api, }) => {
+
+    const chainVaults = utils.fetchURL(chainVaultEndpoints[chainId])
+    const vaults = (await chainVaults).data;
+    if( !vaults || vaults.length === 0) {
+      return toUSDTBalances(0);
+    }
+
+    const balances = await getVaultBalances(chainId, vaults, api);
+    const tokens = vaults.map((vault) => vault.tokenAddress)
+
+    api.add(tokens, balances)
+  }
+}
+
+module.exports = {
+  timetravel: false,
+  misrepresentedTokens: true,
+  doublecounted: true,
+  ...Object.fromEntries(Object.entries(chains).map(chain => [chain[0], {
+    tvl: fetchChain(chain[1])
+  }]))
+}