diff --git a/projects/rain-one/index.js b/projects/rain-one/index.js
new file mode 100644
index 00000000000..66cc7bd64dd
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+++ b/projects/rain-one/index.js
@@ -0,0 +1,46 @@
+const { sumTokens2 } = require('../helper/unwrapLPs')
+const { uniV3Export } = require('../helper/uniswapV3')
+
+// Rain.one RAIN token address on Arbitrum
+const RAIN_TOKEN = "0x25118290e6a5f4139381d072181157035864099d"
+
+// Non-circulating & treasury wallets
+const NON_CIRCULATING_ADDRESSES = [
+    "0x467D5Bf8Cfa1a5f99328fBdCb9C751c78934b725", // Sablier Vesting
+    "0xc41A5462362f6AB4A878AE0Aac91b7259f7176A5", // Claim Presale Contract
+]
+
+// ---- Treasury TVL ----
+async function vesting(api) {
+    return sumTokens2({
+        api,
+        tokensAndOwners: [
+            ...NON_CIRCULATING_ADDRESSES.map(addr => [RAIN_TOKEN, addr]),
+        ],
+    })
+}
+
+// ---- DEX TVLs ----
+// Uniswap V3 (official factory)
+const v3TVL = uniV3Export({
+    arbitrum:{
+        factory: '0x1F98431c8aD98523631AE4a59f267346ea31F984',
+        fromBlock: 377328276,
+    }
+})
+
+async function tvl(api) {
+    await v3TVL?.arbitrum?.tvl(api);
+    return api.getBalances()
+}
+
+module.exports = {
+    timetravel: true,
+    misrepresentedTokens: false,
+    methodology:
+        "TVL includes RAIN tokens held in Rain.one’s vesting/presale contracts, and liquidity in Uniswap V3 pools on Arbitrum.",
+    arbitrum: {
+        tvl,
+        vesting,
+    },
+}
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