Add Project: StakingRewards (srETH) (DefiLlama#9196)

* Add Project: StakingRewards (srETH)

* code refactor

---------

Co-authored-by: g1nt0ki <[email protected]>

Author: SpoolFi

projects/staking-rewards/index.js

@@ -0,0 +1,25 @@
+const abi = {
+  "getSmartVaultAssetBalances": "function getSmartVaultAssetBalances(address, bool) external returns (uint256[] memory)"
+}
+
+const ethContract = "0x5d6ac99835b0dd42ed9ffc606170e59f75a88fde";
+const spoolLens = '0x8aa6174333F75421903b2B5c70DdF8DA5D84f74F';
+
+async function eth(timestamp, ethBlock, chainBlocks, { api }) {
+  const tvlETH = await api.call({
+    target: spoolLens,
+    abi: abi["getSmartVaultAssetBalances"],
+    params: [ethContract, false]
+  });
+  api.addGasToken(tvlETH[0])
+  return api.getBalances()
+}
+
+module.exports = {
+  methodology: 'TVL is counted as deposits routed to the underlying Liquid Staking protocols in the vault.',
+  doublecounted: true, // tokens are stored in underlying LSDs
+  misrepresentedTokens: true,
+  ethereum: {
+    tvl: eth
+  }
+}