Adapter for daily fees and daily revenue data, for assetchain blockchain

fees/assetchain.ts

@@ -0,0 +1,45 @@
+import { Adapter, FetchOptions, ProtocolType } from "../adapters/types";
+import { CHAIN } from "../helpers/chains";
+import { httpGet } from "../utils/fetchURL";
+
+const contractAddress = '0xFC00FACE00000000000000000000000000000000';
+
+
+async function getFees24Hr(api: any) {
+  const currentEpoch = await api.call({ abi: 'uint256:currentSealedEpoch', target: contractAddress })
+  const snapshotABI = 'function getEpochSnapshot(uint256 epoch) view returns (uint256 endTime, uint256 epochFee, uint256 totalBaseRewardWeight, uint256 totalTxRewardWeight, uint256 baseRewardPerSecond, uint256 totalStake, uint256 totalSupply)'
+
+  // Calculate how many 4-hour epochs are in 24 hours (6 epochs)
+  const epochsToFetch = 6;
+  const epochs: any = [];
+
+  // Create array of epoch numbers to fetch (current and previous 5)
+  for (let i = 0; i < epochsToFetch; i++) epochs.push(+currentEpoch - i);
+  const epochData = await api.multiCall({ abi: snapshotABI, calls: epochs, target: contractAddress })
+  return epochData.reduce((acc: any, data: any) => acc + +data.epochFee, 0)
+}
+
+export async function getPrice() {
+  const url = 'https://price.assetchain.org/api/v1/price';
+  const { data: { price }} = await httpGet(url)
+  return price
+}
+
+const adapter: Adapter = {
+  version: 2,
+  adapter: {
+    [CHAIN.ASSETCHAIN]: {
+      fetch: async ({ api, createBalances }: FetchOptions) => {
+        const feesInRwa = await getFees24Hr(api)
+        const dailyFees = createBalances()
+        const price = await getPrice()
+        dailyFees.addUSDValue(price * feesInRwa/1e18)
+        return { dailyFees, dailyRevenue: dailyFees }
+      },
+      start: 1598671449,
+    },
+  },
+  protocolType: ProtocolType.CHAIN
+}
+
+export default adapter;

helpers/chains.ts

@@ -1,6 +1,7 @@
 // Use
 export enum CHAIN {
   ARBITRUM = "arbitrum",
+  ASSETCHAIN = "assetchain",
   AVAX = "avax",
   BLAST = "blast",
   BAHAMUT = "ftn",