Feat/Add oBTC token prices

coins/src/adapters/index.ts

@@ -7,10 +7,12 @@ import * as balancer from "./markets/balancer";
 import * as others from "./other/index";
 import * as others2 from "./other/others2";
 import * as graphCoins from "./markets/graphCoins";
+import * as optimex from "./moneyMarkets/optimex";
 
 export default {
   ...compound.adapters,
   ...aave.adapters,
+  ...optimex.adapters,
   ...euler.adapters, 
   ...uniswap.adapters,
   ...curve.adapters,

coins/src/adapters/moneyMarkets/optimex/abi.ts

@@ -0,0 +1 @@
+export const AGGREGATOR_ABI = "function latestRoundData() external view returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound)";

coins/src/adapters/moneyMarkets/optimex/index.ts

@@ -0,0 +1,34 @@
+import { addToDBWritesList } from "../../utils/database";
+import { Write } from "../../utils/dbInterfaces";
+import { getBtcToUsdPrice } from "./utils";
+
+const oBTCConfig = {
+    address: "0x1Ee774B40eECef1ed4BB702C83A97dc949c900e5",
+    decimals: 8,
+    symbol: "oBTC",
+}
+
+
+export async function obtc(timestamp: number) {
+    const writes: Write[] = [];
+
+    const price = await getBtcToUsdPrice(timestamp);
+
+    addToDBWritesList(
+        writes,
+        "ethereum",
+        oBTCConfig.address,
+        price,
+        oBTCConfig.decimals,
+        oBTCConfig.symbol,
+        timestamp,
+        "optimex",
+        0.98,
+    );
+
+    return writes;
+}
+
+export const adapters = {
+    obtc,
+}

coins/src/adapters/moneyMarkets/optimex/utils.ts

@@ -0,0 +1,14 @@
+import { getApi } from "../../utils/sdk";
+import { AGGREGATOR_ABI } from "./abi";
+
+// BTC/USD Chainlink Oracle on Ethereum
+const BTC_TO_USD_ORACLE_ETH = "0xF4030086522a5bEEa4988F8cA5B36dbC97BeE88c";
+// Rounding decimals for the above chainlink oracle
+const ROUNDING_DECIMALS = 1e8; 
+
+export async function getBtcToUsdPrice(timestamp: number): Promise<number> {
+    const api = await getApi("ethereum", timestamp);
+    const response = await api.call({ abi: AGGREGATOR_ABI, target: BTC_TO_USD_ORACLE_ETH });
+    // Scale down using decimals
+    return response.answer / ROUNDING_DECIMALS;
+  }