feat(napier): add dexs volume adapter + rewrite fees adapter to API-based

dexs/napier/index.ts

@@ -0,0 +1,170 @@
+import { Chain } from "../../adapters/types";
+import axios from "axios";
+import { FetchOptions, FetchResultVolume, SimpleAdapter } from "../../adapters/types";
+import { CHAIN } from "../../helpers/chains";
+
+/**
+ * Napier Finance Volume Adapter
+ *
+ * Tracks swap volume from Napier AMM pools by monitoring on-chain events.
+ * Supports both Curve TwoCrypto pools (TokenExchange events) and
+ * TokiHook/Uniswap V4 pools (HookSwap events).
+ *
+ * Pool addresses and types are fetched from napier-api to dynamically
+ * detect which pools exist on each chain.
+ */
+
+const CURVE_POOL_ABI = {
+  tokenExchangeEvent: "event TokenExchange(address indexed buyer, uint256 sold_id, uint256 tokens_sold, uint256 bought_id, uint256 tokens_bought, uint256 fee, uint256 packed_price_scale)",
+};
+
+const TOKI_HOOK_ABI = {
+  hookSwapEvent: "event HookSwap(bytes32 indexed poolId, address indexed sender, int128 amount0, int128 amount1, uint128 hookLPfeeAmount0, uint128 hookLPfeeAmount1)",
+};
+
+interface Market {
+  chainId: number;
+  metadata: { address: string };
+  pool: {
+    address: string;
+    poolId?: string;
+    poolType?: "CURVE_TWO_CRYPTO" | "TOKI_HOOK";
+  } | null;
+  tokens: {
+    targetToken: { id: string; decimals: number; address: string };
+    assetToken: { id: string; address: string; decimals: number };
+  };
+}
+
+const API_BASE_URL = process.env.NAPIER_API_URL ?? "https://api-v2.napier.finance";
+
+async function fetchMarkets(api: any) {
+  const url = `${API_BASE_URL}/v1/market?chainIds=${api.chainId!}`;
+  const res = await axios.get<Market[]>(url);
+
+
+  if (!Array.isArray(res.data)) {
+    throw new Error(`Napier API returned non-array payload for chainId ${api.chainId}`);
+  }
+
+  const curvePools: string[] = [];
+  const poolToMarket = new Map<string, Market>();
+  let tokiHookAddress: string | null = null;
+  const poolIdToMarket = new Map<string, Market>();
+
+  for (const market of res.data) {
+    if (!market.pool?.address) continue;
+    const poolAddress = market.pool.address;
+    poolToMarket.set(poolAddress.toLowerCase(), market);
+
+    if (market.pool.poolType === "TOKI_HOOK" && market.pool.poolId) {
+      tokiHookAddress = poolAddress;
+      poolIdToMarket.set(market.pool.poolId.toLowerCase(), market);
+    } else if (market.pool.poolType === "CURVE_TWO_CRYPTO") {
+      curvePools.push(poolAddress);
+    }
+  }
+
+  return { curvePools, tokiHookAddress, poolIdToMarket, poolToMarket };
+}
+
+const fetch = async (options: FetchOptions) => {
+    const { getLogs, createBalances } = options;
+    const { curvePools, tokiHookAddress, poolIdToMarket, poolToMarket } = await fetchMarkets(options.api);
+    const dailyVolume = createBalances();
+
+    // Track Curve TwoCrypto pool volume via TokenExchange events
+    if (curvePools.length > 0) {
+      const curveExchangeEvents = await getLogs({
+        targets: curvePools,
+        eventAbi: CURVE_POOL_ABI.tokenExchangeEvent,
+        flatten: false,
+      });
+
+      for (let i = 0; i < curvePools.length; i++) {
+        const poolAddress = curvePools[i].toLowerCase();
+        const market = poolToMarket.get(poolAddress);
+        if (!market) continue;
+
+        const events = curveExchangeEvents[i];
+        if (!events || events.length === 0) continue;
+
+        const assetToken = market.tokens.assetToken.address;
+        const assetDecimals = market.tokens.assetToken.decimals;
+        const targetDecimals = market.tokens.targetToken.decimals;
+
+        for (const event of events) {
+          const soldId = event.sold_id;
+          const boughtId = event.bought_id;
+          const tokensSold = event.tokens_sold;
+          const tokensBought = event.tokens_bought;
+
+          // Target token is always token index 1 in the Curve pool
+          let targetAmount: bigint;
+          if (soldId === 1n) {
+            targetAmount = tokensSold;
+          } else if (boughtId === 1n) {
+            targetAmount = tokensBought;
+          } else {
+            continue;
+          }
+
+          // Convert target token amount to asset token terms for pricing
+          const assetAmount = targetAmount * BigInt(10 ** assetDecimals) / BigInt(10 ** targetDecimals);
+          dailyVolume.add(assetToken, assetAmount);
+        }
+      }
+    }
+
+    // Track TokiHook (Uniswap V4) pool volume via HookSwap events
+    // tokiHookAddress is the singleton contract derived from the API response (pool.address for TOKI_HOOK markets)
+    if (tokiHookAddress && poolIdToMarket.size > 0) {
+      const hookSwapEvents = await getLogs({
+        target: tokiHookAddress,
+        eventAbi: TOKI_HOOK_ABI.hookSwapEvent,
+      });
+
+      for (const event of hookSwapEvents) {
+        const market = poolIdToMarket.get(event.poolId.toLowerCase());
+        if (!market) continue;
+
+        const assetToken = market.tokens.assetToken.address;
+        const assetDecimals = market.tokens.assetToken.decimals;
+        const targetDecimals = market.tokens.targetToken.decimals;
+        const absAmount0 = event.amount0 < 0n ? -event.amount0 : event.amount0;
+        const assetAmount = absAmount0 * BigInt(10 ** assetDecimals) / BigInt(10 ** targetDecimals);
+        dailyVolume.add(assetToken, assetAmount);
+      }
+    }
+
+    return { dailyVolume };
+  };
+
+const methodology = {
+  Volume: "Aggregates trading volume from Napier AMM pools by tracking on-chain swap events. Supports Curve AMM (TwoCrypto) pools via TokenExchange events and Napier AMM (TokiHook/Uniswap V4) pools via HookSwap events.",
+};
+
+const chainConfig: Record<Chain, { start: string }> = {
+  [CHAIN.ETHEREUM]: { start: "2024-02-28" },
+  [CHAIN.BASE]: { start: "2024-02-27" },
+  [CHAIN.SONIC]: { start: "2024-03-07" },
+  [CHAIN.ARBITRUM]: { start: "2024-03-11" },
+  [CHAIN.OPTIMISM]: { start: "2024-03-11" },
+  [CHAIN.FRAXTAL]: { start: "2024-03-11" },
+  [CHAIN.MANTLE]: { start: "2024-03-11" },
+  [CHAIN.BSC]: { start: "2024-03-11" },
+  [CHAIN.POLYGON]: { start: "2024-03-12" },
+  [CHAIN.AVAX]: { start: "2024-03-12" },
+  [CHAIN.HYPERLIQUID]: { start: "2024-03-13" },
+  [CHAIN.PLUME]: { start: "2024-03-13" },
+};
+
+const adapter: SimpleAdapter = {
+  version: 2,
+  pullHourly: true,
+  fetch,
+  adapter: chainConfig,
+  methodology,
+};
+
+export default adapter;