server_example

import app from "express";
import banano from "@bananocoin/bananojs";
import axios from "axios";

const server = app();
banano.setBananodeApiUrl("https://kaliumapi.appditto.com/api");

server.get("/", async (req, res) => {
  if (req.headers["authorization"] !== process.env.API_KEY) {
    res.status(401).send("Unauthorized");
    return;
  }
  const address = process.env.ADDRESS!;
  const margin = 1.02;
  const balance = await getBalance(address);
  let rate = (await getRate()) * margin;
  res.json({ balance, rate });
});

server.post("/", async (req, res) => {
  //@ts-ignore
  const requestIsValid = ({ payment, amount, address }) => {
    // implementation left up to the user
    return true;
  };
  if (req.headers["authorization"] !== process.env.API_KEY) {
    res.status(401).send("Unauthorized");
    return;
  }
  if (!requestIsValid(req.body)) {
    res.status(400).send("Invalid request");
    return;
  }
  const hash = await sendBanano(req.body.amount, req.body.address, process.env.SEED!);
  res.json({ hash });
});

server.listen(3003, () => {
  console.log("Server listening on port 3003");
});

async function sendBanano(amount: number, recipient: string, seed: string): Promise<string> {
  return new Promise(async (resolve, reject) => {
    const rawAmount = banano.getRawStrFromBananoStr(String(amount));
    banano.sendAmountToBananoAccount(
      seed,
      0,
      recipient,
      rawAmount,
      (hash: string) => {
        console.log("Transaction hash:", hash), resolve(hash);
      },
      (error: any) => reject(error)
    );
  });
}

async function getBalance(account: string) {
  const accountInfo = await banano.getAccountInfo(account);
  return Math.floor(accountInfo.balance_decimal);
}
async function getRate(): Promise<number> {
  const banano = await axios.get(
    "https://api.coingecko.com/api/v3/simple/price?ids=banano&vs_currencies=eur"
  );
  const exchangeRate = banano.data.banano.eur;

  return exchangeRate;
}