Get price from Uniswap V2 and rewrite to TypeScript

.env.example

@@ -1,2 +1,3 @@
 BOT_TOKEN=
-TELEGRAM_CHANNEL_NAME=@torn_prices
+TELEGRAM_CHANNEL_NAME=@torn_prices
+MAINNET_RPC_URL=https://ethereum.publicnode.com

.gitignore

@@ -1,2 +1,2 @@
-.idea
+node_modules
 .env

README.md

@@ -5,4 +5,6 @@
 3. Copy `.env.example` file content to `.env`;
 4. Fill in `.env` file `BOT_TOKEN` value with a string containing your telegram bot token;
 5. Replace in `.env` file `TELEGRAM_CHANNEL_NAME` value with a string containing inner telegram link to your public channel (for example, `@torn_prices`);
-6. Start script in the background: `python3 main.py &`
+6. Replace in `.env` file `MAINNET_RPC_URL` value, if default RPC doesn't work;
+7. Install dependencies: `npm i`
+8. Start script in the background: `npm run start`

index.ts

@@ -0,0 +1,41 @@
+import { ChainId, Token, Fetcher, Route } from "@uniswap/sdk";
+import { ethers } from "ethers";
+import * as dotenv from "dotenv";
+import fetch from "node-fetch";
+dotenv.config();
+
+const botToken = process.env.BOT_TOKEN;
+const channelName = process.env.TELEGRAM_CHANNEL_NAME;
+
+const TORN = new Token(ChainId.MAINNET, "0x77777FeDdddFfC19Ff86DB637967013e6C6A116C", 18);
+const USDT = new Token(ChainId.MAINNET, "0xdAC17F958D2ee523a2206206994597C13D831ec7", 6);
+const WETH = new Token(ChainId.MAINNET, "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", 18);
+
+const provider = new ethers.providers.JsonRpcProvider(process.env.MAINNET_RPC_URL);
+
+async function getPrice(): Promise<string> {
+    // Route via WETH, because TORN/USDT pair doesn't have enough liquidity
+    const pairTORNWETH = await Fetcher.fetchPairData(TORN, WETH, provider);
+    const pairWETHUSDT = await Fetcher.fetchPairData(WETH, USDT, provider);
+    const route = new Route([pairTORNWETH, pairWETHUSDT], TORN, USDT);
+    return route.midPrice.toSignificant(3);
+}
+
+async function sendPriceToChannel(price: string) {
+    try {
+        await fetch(`https://api.telegram.org/bot${botToken}/sendMessage?chat_id=${channelName}&text=${price}`);
+    } catch (error) {}
+}
+
+async function main() {
+    try {
+        const tokenPrice = await getPrice();
+        await sendPriceToChannel(tokenPrice);
+    } catch (error) {
+        console.error(error);
+    }
+
+    setTimeout(main, 1000 * 15);
+}
+
+main();

main.py

@@ -1,42 +0,0 @@
-from urllib.error import HTTPError
-from urllib.request import urlopen as get
-from threading import Timer
-import json
-import os
-from dotenv import load_dotenv
-
-load_dotenv()
-
-BINANCE_API_GET_ETH_PRICE_LINK = "https://api.binance.com/api/v3/ticker/price?symbol=TORNBUSD"
-BOT_TOKEN = os.getenv("BOT_TOKEN")
-TELEGRAM_CHANNEL_NAME = os.getenv("TELEGRAM_CHANNEL_NAME")
-TELEGRAM_API_SEND_MESSAGE_LINK = f"https://api.telegram.org/bot{BOT_TOKEN}/sendMessage?chat_id={TELEGRAM_CHANNEL_NAME}&text="
-CHECK_PRICE_INTERVAL_IN_SECONDS = 10
-
-
-def send_price_to_channel(price: float):
-    fixed_price = "{:10.2f}".format(price).strip()
-    full_request_link = f'{TELEGRAM_API_SEND_MESSAGE_LINK}{fixed_price}$'
-    try:
-        get(full_request_link)
-    except HTTPError:
-        pass
-
-
-def get_eth_price_from_binance() -> float:
-    try:
-        data = json.load(get(BINANCE_API_GET_ETH_PRICE_LINK))
-        return float(data["price"])
-    except HTTPError:
-        return -1
-
-
-def main():
-    Timer(CHECK_PRICE_INTERVAL_IN_SECONDS, main).start()
-    current_eth_price = get_eth_price_from_binance()
-    if current_eth_price == -1:
-        return
-    send_price_to_channel(current_eth_price)
-
-
-main()

package.json

@@ -0,0 +1,30 @@
+{
+    "name": "torn-price-bot",
+    "version": "1.0.0",
+    "description": "Telegram bot with actual TORN price",
+    "main": "index.ts",
+    "scripts": {
+        "start": "ts-node index.ts &",
+        "dev": "nodemon index.ts"
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://git.tornado.ws/Theo/torn-price-bot.git"
+    },
+    "author": "Theo",
+    "license": "MIT",
+    "dependencies": {
+        "@uniswap/sdk": "^3.0.3",
+        "@uniswap/sdk-core": "^4.0.9",
+        "@uniswap/v2-sdk": "^3.2.3",
+        "dotenv": "^16.3.1",
+        "ethers": "5.7",
+        "node-fetch": "^2.7.0"
+    },
+    "devDependencies": {
+        "@types/node-fetch": "^2.6.9",
+        "nodemon": "^3.0.2",
+        "ts-node": "^10.9.2",
+        "typescript": "^5.3.3"
+    }
+}