Add TVL adapter for Stakin.gg on Base (DefiLlama#14295)

Author: Stakin-gg

projects/stakin-gg/index.js

@@ -0,0 +1,12 @@
+const WETH = '0x4200000000000000000000000000000000000006';
+const CONTRACT = '0xEF5E916de82839A8131eaac866280492966cd37C';
+
+async function tvl(api) {
+  return api.sumTokens({ tokens: [WETH], owners: [CONTRACT] });
+}
+
+module.exports = {
+  methodology: 'Counts WETH in the project’s main contract',
+  start: 28896428,
+  base: { tvl },
+};