setposition.js

const fetch = require("node-fetch"); // "Fetch" HTTP req library
const finex = require("./finex");

let params = {
  sku: 'start',
  symbol: "tBTCUSD",
  type: "LIMIT",
//  target: 25500,
  limit: 100,
//  amount: 0.002, //0.0052, //200
  algo: "TRACKER",
};

// node index.js '{"target":36600, "amount": 0.022, "limit":250}'
console.log(JSON.stringify(params));
const myArgs = JSON.parse(process.argv.slice(2));
console.log("myArgs: ", myArgs);
if(!myArgs.target || !myArgs.amount) return;
params = Object.assign({}, params, myArgs);
console.log(JSON.stringify(params));

finex.__set_api(
  "",
  ""
);
finex.__send("v2/auth/r/positions", {}, (err_positions, positions) => {
  if (err_positions) return console.log(err_positions);
  //console.log(positions);
  const old_position = positions.find((e) => e[0] === params.symbol);
  const [,, start_amount] = old_position || [,, 0];
  console.log(start_amount);
  const diff = (Number(params.amount)/1000) - (start_amount || 0);
  console.log(diff);
  const amount = diff.toFixed(8);
  console.log(amount);
  if(!amount) return;
  
  //process.exit();
  finex.__send("v2/auth/r/orders", {}, (err_orders, orders) => {
    const robot_order = orders.find((e) => e[31].sku === params.sku);
    // NEW ORDER
    if (!robot_order) {
      finex.__send(
        "v2/auth/w/order/submit",
        {
          type: params.type,
          symbol: params.symbol,
          price: `${params.target}`,
          amount,
          meta: {
            sku: params.sku,
            target: params.target,
            limit: params.limit,
            algo: params.algo
          }, // optional param to pass an affiliate code
        },
        (err_new_order, new_order) => {
          if (err_new_order) console.log(err_new_order);
          console.log(JSON.stringify(new_order));
        }
      );
      // UPDATE ORDER
    } else {
      finex.__send(
        "v2/auth/w/order/update",
        {
          id: robot_order[0],
          price: `${params.target}`,
          amount,
        },
        (err_update, updated_order) => {
          if (err_update) console.log(err_update);
          console.log(JSON.stringify(updated_order));
        }
      );
    }
  });
});