feat: Add FeeFree volume & fee adpater

dexs/FeeFree/index.ts

@@ -0,0 +1,92 @@
+import { FetchOptions, FetchV2, SimpleAdapter } from "../../adapters/types";
+import { CHAIN } from "../../helpers/chains";
+import { addOneToken } from "../../helpers/prices";
+
+const INITIALIZE_EVENT_ABI = 'event Initialize(bytes32 id, address indexed currency0, address indexed currency1, uint24 fee, int24 tickSpacing, address hooks)';
+const SWAP_EVENT_ABI = "event Swap(bytes32 indexed id, address sender, int128 amount0, int128 amount1, uint160 sqrtPriceX96, uint128 liquidity, int24 tick, uint24 fee)";
+
+const CONFIG = {
+  [CHAIN.ZORA]: {
+    pool: "0xB43287b2106BC044F07aE674794f5492E851d3dC",
+    router: "0x0Fee97363deEFBE4De038D437D805A98dbEbA400",
+    fromBlock: 13704184,
+    swapFee: 10000000000000n,
+  },
+  [CHAIN.BASE]: {
+    pool: "0xc08304a5300D9a2310A603b8D7fB8470f752947F",
+    router: "0x0Fee76f15DE74A5211e5Bc2aBF95394d7f50C400",
+    fromBlock: 14089843,
+    swapFee: 10000000000000n,
+  },
+};
+
+type Pair = {
+  id: string,
+  currency0: string;
+  currency1: string;
+};
+
+const getTokenPairs = async (options: FetchOptions): Promise<{[id:string]: Pair}> => {
+  const config = CONFIG[options.chain];
+
+  const logs = await options.api.getLogs({
+    target: config.pool,
+    eventAbi: INITIALIZE_EVENT_ABI,
+    fromBlock: config.fromBlock,
+    toBlock: options.api.block,
+    onlyArgs: true,
+  });
+
+  const pairs = logs.map(log => {
+    const [id, currency0, currency1] = log
+    return { id, currency0, currency1 }
+  });
+
+  return Object.fromEntries(pairs.map((pair) => [pair.id, pair]));
+}
+
+const fetchVolume: FetchV2 = async (options: FetchOptions) => {
+  const dailyVolume = options.createBalances();
+  const dailyFees = options.createBalances();
+  const pairs = await getTokenPairs(options);
+
+  const config = CONFIG[options.chain];
+  const logs = await options.getLogs({
+    target: config.pool,
+    eventAbi: SWAP_EVENT_ABI,
+  });
+  logs.forEach((log: any) => {
+    const [id,,amount0, amount1] = log;
+    const pair = pairs[id];
+    addOneToken({
+      balances: dailyVolume,
+      chain: options.chain,
+      token0: pair.currency0,
+      token1: pair.currency1,
+      amount0,
+      amount1,
+    });
+  });
+  dailyFees.addGasToken(config.swapFee * BigInt(logs.length));
+
+  return {
+    dailyVolume,
+    dailyFees,
+  }
+}
+
+const adapter: SimpleAdapter = {
+  version: 2,
+  adapter: {
+    [CHAIN.ZORA]: {
+      fetch: fetchVolume,
+      start: 1714060800,
+    },
+    [CHAIN.BASE]: {
+      fetch: fetchVolume,
+      start: 1714939200,
+    },
+  }
+}
+
+export default adapter;

helpers/coreAssets.json

@@ -1567,5 +1567,8 @@
   },
   "zeta": {
     "WZETA": "0x5f0b1a82749cb4e2278ec87f8bf6b618dc71a8bf"
+  },
+  "zora": {
+    "USDzC": "0xcccccccc7021b32ebb4e8c08314bd62f7c653ec4"
   }
 }