Buy new pair once added to Binance (Experimental)

db.json

{
  "pairs": [
    {
      "symbol": "BNBBUSD",
      "price": "206.50010000"
    },
    {
      "symbol": "BTCBUSD",
      "price": "51875.51000000"
    },
    {
      "symbol": "ETHBUSD",
      "price": "1944.40000000"
    },
    {
      "symbol": "BCHABCBUSD",
      "price": "220.16000000"
    },
    {
      "symbol": "LTCBUSD",
      "price": "229.88000000"
    },
    {
      "symbol": "LINKBUSD",
      "price": "32.64920000"
    },
    {
      "symbol": "ETCBUSD",
      "price": "15.07350000"
    },
    {
      "symbol": "TRXBUSD",
      "price": "0.05616000"
    },
    {
      "symbol": "EOSBUSD",
      "price": "4.87780000"
    },
    {
      "symbol": "XLMBUSD",
      "price": "0.50258000"
    },
    {
      "symbol": "ADABUSD",
      "price": "0.92871000"
    },
    {
      "symbol": "BCHBUSD",
      "price": "710.87000000"
    },
    {
      "symbol": "QTUMBUSD",
      "price": "7.17300000"
    },
    {
      "symbol": "VETBUSD",
      "price": "0.05560400"
    },
    {
      "symbol": "EURBUSD",
      "price": "1.20630000"
    },
    {
      "symbol": "BULLBUSD",
      "price": "1368.56000000"
    },
    {
      "symbol": "BEARBUSD",
      "price": "11.14000000"
    },
    {
      "symbol": "ETHBULLBUSD",
      "price": "78.46000000"
    },
    {
      "symbol": "ETHBEARBUSD",
      "price": "12.24000000"
    },
    {
      "symbol": "ICXBUSD",
      "price": "2.35550000"
    },
    {
      "symbol": "BTSBUSD",
      "price": "0.01930000"
    },
    {
      "symbol": "BNTBUSD",
      "price": "5.95490000"
    },
    {
      "symbol": "ATOMBUSD",
      "price": "23.29300000"
    },
    {
      "symbol": "DASHBUSD",
      "price": "284.38000000"
    },
    {
      "symbol": "NEOBUSD",
      "price": "44.26800000"
    },
    {
      "symbol": "WAVESBUSD",
      "price": "12.46540000"
    },
    {
      "symbol": "XTZBUSD",
      "price": "4.92800000"
    },
    {
      "symbol": "EOSBULLBUSD",
      "price": "3.90000000"
    },
    {
      "symbol": "EOSBEARBUSD",
      "price": "29.81000000"
    },
    {
      "symbol": "XRPBULLBUSD",
      "price": "8.78000000"
    },
    {
      "symbol": "XRPBEARBUSD",
      "price": "547.33000000"
    },
    {
      "symbol": "BATBUSD",
      "price": "0.64650000"
    },
    {
      "symbol": "ENJBUSD",
      "price": "0.58664000"
    },
    {
      "symbol": "NANOBUSD",
      "price": "7.33700000"
    },
    {
      "symbol": "ONTBUSD",
      "price": "1.25630000"
    },
    {
      "symbol": "RVNBUSD",
      "price": "0.10192000"
    },
    {
      "symbol": "STRATBUSD",
      "price": "0.49150000"
    },
    {
      "symbol": "AIONBUSD",
      "price": "0.07210000"
    },
    {
      "symbol": "ALGOBUSD",
      "price": "1.40800000"
    },
    {
      "symbol": "BTTBUSD",
      "price": "0.00124260"
    },
    {
      "symbol": "TOMOBUSD",
      "price": "2.16100000"
    },
    {
      "symbol": "XMRBUSD",
      "price": "262.68000000"
    },
    {
      "symbol": "ZECBUSD",
      "price": "172.18000000"
    },
    {
      "symbol": "BNBBULLBUSD",
      "price": "58.37000000"
    },
    {
      "symbol": "BNBBEARBUSD",
      "price": "57.21000000"
    },
    {
      "symbol": "DATABUSD",
      "price": "0.11884000"
    },
    {
      "symbol": "SOLBUSD",
      "price": "9.05990000"
    },
    {
      "symbol": "CTSIBUSD",
      "price": "0.22215000"
    },
    {
      "symbol": "ERDBUSD",
      "price": "0.01966100"
    },
    {
      "symbol": "HBARBUSD",
      "price": "0.14679000"
    },
    {
      "symbol": "MATICBUSD",
      "price": "0.12633000"
    },
    {
      "symbol": "WRXBUSD",
      "price": "0.24050000"
    },
    {
      "symbol": "ZILBUSD",
      "price": "0.13749000"
    },
    {
      "symbol": "KNCBUSD",
      "price": "2.27100000"
    },
    {
      "symbol": "REPBUSD",
      "price": "13.67300000"
    },
    {
      "symbol": "LRCBUSD",
      "price": "0.76728000"
    },
    {
      "symbol": "IQBUSD",
      "price": "0.00804300"
    },
    {
      "symbol": "GBPBUSD",
      "price": "1.39220000"
    },
    {
      "symbol": "DGBBUSD",
      "price": "0.07644000"
    },
    {
      "symbol": "COMPBUSD",
      "price": "460.64000000"
    },
    {
      "symbol": "BKRWBUSD",
      "price": "0.00084550"
    },
    {
      "symbol": "SXPBUSD",
      "price": "3.09530000"
    },
    {
      "symbol": "SNXBUSD",
      "price": "23.52000000"
    },
    {
      "symbol": "VTHOBUSD",
      "price": "0.00071800"
    },
    {
      "symbol": "DCRBUSD",
      "price": "16.03500000"
    },
    {
      "symbol": "STORJBUSD",
      "price": "0.36200000"
    },
    {
      "symbol": "IRISBUSD",
      "price": "0.06080000"
    },
    {
      "symbol": "MKRBUSD",
      "price": "2672.10000000"
    },
    {
      "symbol": "DAIBUSD",
      "price": "1.01810000"
    },
    {
      "symbol": "RUNEBUSD",
      "price": "4.03240000"
    },
    {
      "symbol": "MANABUSD",
      "price": "0.30683000"
    },
    {
      "symbol": "DOGEBUSD",
      "price": "0.05775500"
    },
    {
      "symbol": "LENDBUSD",
      "price": "0.51530000"
    },
    {
      "symbol": "ZRXBUSD",
      "price": "1.61630000"
    },
    {
      "symbol": "AUDBUSD",
      "price": "0.77458000"
    },
    {
      "symbol": "FIOBUSD",
      "price": "0.15940000"
    },
    {
      "symbol": "AVABUSD",
      "price": "2.55000000"
    },
    {
      "symbol": "IOTABUSD",
      "price": "1.50020000"
    },
    {
      "symbol": "BALBUSD",
      "price": "47.15000000"
    },
    {
      "symbol": "YFIBUSD",
      "price": "44647.37000000"
    },
    {
      "symbol": "BLZBUSD",
      "price": "0.07104000"
    },
    {
      "symbol": "KMDBUSD",
      "price": "0.46760000"
    },
    {
      "symbol": "JSTBUSD",
      "price": "0.06134000"
    },
    {
      "symbol": "SRMBUSD",
      "price": "4.00950000"
    },
    {
      "symbol": "ANTBUSD",
      "price": "6.24170000"
    },
    {
      "symbol": "CRVBUSD",
      "price": "2.86600000"
    },
    {
      "symbol": "SANDBUSD",
      "price": "0.30903600"
    },
    {
      "symbol": "OCEANBUSD",
      "price": "1.19120000"
    },
    {
      "symbol": "NMRBUSD",
      "price": "42.28900000"
    },
    {
      "symbol": "DOTBUSD",
      "price": "31.10710000"
    },
    {
      "symbol": "LUNABUSD",
      "price": "6.75730000"
    },
    {
      "symbol": "IDEXBUSD",
      "price": "0.07965000"
    },
    {
      "symbol": "RSRBUSD",
      "price": "0.06226000"
    },
    {
      "symbol": "PAXGBUSD",
      "price": "1890.00000000"
    },
    {
      "symbol": "WNXMBUSD",
      "price": "22.16500000"
    },
    {
      "symbol": "TRBBUSD",
      "price": "50.51200000"
    },
    {
      "symbol": "BZRXBUSD",
      "price": "0.64240000"
    },
    {
      "symbol": "SUSHIBUSD",
      "price": "15.83600000"
    },
    {
      "symbol": "YFIIBUSD",
      "price": "3310.15000000"
    },
    {
      "symbol": "KSMBUSD",
      "price": "220.90800000"
    },
    {
      "symbol": "EGLDBUSD",
      "price": "153.42500000"
    },
    {
      "symbol": "DIABUSD",
      "price": "3.24000000"
    },
    {
      "symbol": "BELBUSD",
      "price": "3.26600000"
    },
    {
      "symbol": "SWRVBUSD",
      "price": "1.89900000"
    },
    {
      "symbol": "WINGBUSD",
      "price": "32.08100000"
    },
    {
      "symbol": "CREAMBUSD",
      "price": "191.10000000"
    },
    {
      "symbol": "UNIBUSD",
      "price": "21.46940000"
    },
    {
      "symbol": "AVAXBUSD",
      "price": "40.27390000"
    },
    {
      "symbol": "FLMBUSD",
      "price": "0.52970000"
    },
    {
      "symbol": "CAKEBUSD",
      "price": "14.09500000"
    },
    {
      "symbol": "XVSBUSD",
      "price": "84.43600000"
    },
    {
      "symbol": "ALPHABUSD",
      "price": "1.66453000"
    },
    {
      "symbol": "VIDTBUSD",
      "price": "0.75700000"
    },
    {
      "symbol": "AAVEBUSD",
      "price": "446.93800000"
    },
    {
      "symbol": "NEARBUSD",
      "price": "4.46000000"
    },
    {
      "symbol": "FILBUSD",
      "price": "43.03160000"
    },
    {
      "symbol": "INJBUSD",
      "price": "16.29990000"
    },
    {
      "symbol": "AERGOBUSD",
      "price": "0.11500000"
    },
    {
      "symbol": "ONEBUSD",
      "price": "0.02854700"
    },
    {
      "symbol": "AUDIOBUSD",
      "price": "0.43975000"
    },
    {
      "symbol": "CTKBUSD",
      "price": "2.31140000"
    },
    {
      "symbol": "BOTBUSD",
      "price": "2565.90000000"
    },
    {
      "symbol": "KP3RBUSD",
      "price": "435.95000000"
    },
    {
      "symbol": "AXSBUSD",
      "price": "2.18373000"
    },
    {
      "symbol": "HARDBUSD",
      "price": "2.14000000"
    },
    {
      "symbol": "DNTBUSD",
      "price": "0.31376000"
    },
    {
      "symbol": "CVPBUSD",
      "price": "4.12380000"
    },
    {
      "symbol": "STRAXBUSD",
      "price": "1.69950000"
    },
    {
      "symbol": "FORBUSD",
      "price": "0.04995000"
    },
    {
      "symbol": "UNFIBUSD",
      "price": "29.94520000"
    },
    {
      "symbol": "FRONTBUSD",
      "price": "3.60980000"
    },
    {
      "symbol": "BCHABUSD",
      "price": "17.95900000"
    },
    {
      "symbol": "ROSEBUSD",
      "price": "0.12908000"
    },
    {
      "symbol": "SYSBUSD",
      "price": "0.17667000"
    },
    {
      "symbol": "HEGICBUSD",
      "price": "0.44940000"
    },
    {
      "symbol": "PROMBUSD",
      "price": "24.13510000"
    },
    {
      "symbol": "SKLBUSD",
      "price": "0.30549000"
    },
    {
      "symbol": "COVERBUSD",
      "price": "1547.97000000"
    },
    {
      "symbol": "GHSTBUSD",
      "price": "1.25320000"
    },
    {
      "symbol": "DFBUSD",
      "price": "0.43360000"
    },
    {
      "symbol": "JUVBUSD",
      "price": "12.35700000"
    },
    {
      "symbol": "PSGBUSD",
      "price": "12.52100000"
    },
    {
      "symbol": "BTCSTBUSD",
      "price": "218.16700000"
    },
    {
      "symbol": "TRUBUSD",
      "price": "0.51200000"
    },
    {
      "symbol": "DEXEBUSD",
      "price": "9.01100000"
    },
    {
      "symbol": "USDCBUSD",
      "price": "0.99980000"
    },
    {
      "symbol": "TUSDBUSD",
      "price": "0.99960000"
    },
    {
      "symbol": "PAXBUSD",
      "price": "1.00000000"
    },
    {
      "symbol": "CKBBUSD",
      "price": "0.01034500"
    },
    {
      "symbol": "TWTBUSD",
      "price": "0.79850000"
    },
    {
      "symbol": "LITBUSD",
      "price": "11.29070000"
    },
    {
      "symbol": "SFPBUSD",
      "price": "3.14550000"
    },
    {
      "symbol": "FXSBUSD",
      "price": "13.20000000"
    },
    {
      "symbol": "XRPBUSD",
      "price": "0.52685000"
    }
  ]
}

index.js

const Binance = require('node-binance-api');

const binance = new Binance().options({
  APIKEY: '***',
  APISECRET: '***'
});

const low = require('lowdb')
const FileSync = require('lowdb/adapters/FileSync')

const adapter = new FileSync('db.json')
const db = low(adapter)

db.defaults({ pairs: [] }).write()

setInterval(() => {
  (async () => {
    console.log("getting pairs...")
    let ticker = await binance.prices();
    let entries = Object.entries(ticker).filter(pair => pair[0].endsWith("BUSD"))
    console.log("number of pairs: " + entries.length)
    let pairs = db.get('pairs')
    for (var i = 0; i < entries.length; i++) {
      let pair = entries[i]

      if (pair[1] > 0) {
        if (pairs.find({ symbol: pair[0] }).value() === undefined) {
          // NEW PAIR
          console.log("[!] new pair added : " + pair[0])
          pairs.push({ symbol: pair[0], price: pair[1] }).write()

          let price = pair[1]

          let quantity = (20 / price).toFixed(1);

          console.log("buying " + quantity + " amount of " + pair[0])

          binance.marketBuy(pair[0], quantity, (error, response) => {
            if (error != null) {
              console.error("error", error)
            } else {
              // console.info("Market Buy response", response);
              console.log("bought " + response["executedQty"] + " amount of " + response["symbol"] + ", cummulativeQuoteQty: " + response["cummulativeQuoteQty"] + " BUSD")
            }
          });

          break
        }
      }

    }
  })()
}, 10000)

package.json

{
  "name": "binance",
  "version": "1.0.0",
  "description": "Binance",
  "main": "src/index.js",
  "dependencies": {
    "node-binance-api": "^0.12.4",
    "lowdb": "^1.0.0"
  },
  "devDependencies": {},
  "scripts": {
    "start": "node src/index.js"
  },
  "author": "Milad Doorbash",
  "license": "MIT"
}

npm start -i 1 --name binance src/index.js