freekassa-node/index.js

Generate URL for payment in Freekassa.

module.exports = (params, world) => {
  if (!params || !world || typeof params !== "object") {
    throw new Error("Missing params and secret world");
  }

  let result = {},
    params_arr = [],
    url = "https://pay.freekassa.ru/?";

  params = JSON.parse(JSON.stringify(params));

  if (params.oa) {
    params.oa = parseFloat(params.oa).toString();
  }

  if (params.m && params.oa && params.o && params.currency) {
    params_arr.push(params.m);
    params_arr.push(params.oa);
    params_arr.push(world);
    params_arr.push(params.currency);
    params_arr.push(params.o);
  } else if (
    params["MERCHANT_ID"] &&
    params["AMOUNT"] &&
    params["MERCHANT_ORDER_ID"] &&
    params["MERCHANT_ORDER_ID"]
  ) {
    params_arr.push(params["MERCHANT_ID"]);
    params_arr.push(params["AMOUNT"]);
    params_arr.push(world);
    params_arr.push(params["MERCHANT_ORDER_ID"]);
    return {
      signature: require("crypto")
        .createHash("md5")
        .update(params_arr.join(":"))
        .digest("hex"),
    };
  } else {
    throw new Error("Required parameters are not specified");
  }

  result.signature = require("crypto")
    .createHash("md5")
    .update(params_arr.join(":"))
    .digest("hex");

  params.s = result.signature;

  Object.keys(params).forEach(function (p) {
    url += p + "=" + encodeURIComponent(params[p]) + "&";
  });

  result.url = url;

  return result;
};