560 lines
23 KiB
JavaScript
560 lines
23 KiB
JavaScript
exports.newAssistant = function newAssistant(BOT, DEBUG_MODULE) {
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/*
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This module allows trading bots to execute actions on the exchange, and also on its current recorded state.
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*/
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const MODULE_NAME = "Assistant";
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thisObject = {
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initialize: initialize,
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putPositionAtExchange: putPositionAtExchange,
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movePositionAtExchange: movePositionAtExchange
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};
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let bot = BOT;
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const logger = DEBUG_MODULE.newDebugLog();
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logger.fileName = MODULE_NAME;
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let exchangePositions = []; // These are the open positions at the exchange at the account the bot is authorized to use.
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let openPositions = []; // These are the open positions the bot knows it made by itself.
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let botContext;
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let processDatetime;
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let exchangeAPI;
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/* The current bots trades only at one market: USDT_BTC. */
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const MARKET = {
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assetA: "USDT",
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assetB: "BTC",
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};
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return thisObject;
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function initialize(pBotContext, pProcessDatetime, pExchangeAPI, callBackFunction) {
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try {
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/* Store local values. */
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botContext = pBotContext;
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processDatetime = pProcessDatetime;
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exchangeAPI = pExchangeAPI;
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getPositionsAtExchange(onDone);
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function onDone(err) {
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try {
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switch (err) {
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case null: {
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callBackFunction(null);
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}
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break;
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case 'Retry Later': { // Something bad happened, but if we retry in a while it might go through the next time.
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logger.write("[ERROR] initialize -> onDone -> Retry Later. Requesting Execution Retry.");
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callBackFunction(err);
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return;
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}
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break;
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case 'Retry Later': { // This is an unexpected exception that we do not know how to handle.
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logger.write("[ERROR] initialize -> onDone -> Operation Failed. Aborting the process.");
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callBackFunction(err);
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return;
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}
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break;
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}
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} catch (err) {
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logger.write("[ERROR] initialize -> onDone -> err = " + err);
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callBackFunction("Operation Failed");
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}
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}
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} catch (err) {
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logger.write("[ERROR] initialize -> err = " + err);
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callBackFunction("Operation Failed");
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}
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}
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function getPositionsAtExchange(callBack) {
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try {
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/*
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Here we grab all the positions at the exchange for the account we are using for trading. We will not asume all the positions
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were made by this bot, but we need them all to later check if all the ones made by the bot are still there, were executed or
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manually cancelled by the exchange account owner.
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*/
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exchangeAPI.getOpenPositions(MARKET, onResponse);
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function onResponse(err, pExchangePositions) {
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switch (err) {
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case null: { // Everything went well, we have the information requested.
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exchangePositions = pExchangePositions;
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ordersExecutionCheck(callBack);
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}
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break;
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case 'Retry Later': { // Something bad happened, but if we retry in a while it might go through the next time.
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logger.write("[ERROR] getPositionsAtExchange -> onResponse -> Retry Later. Requesting Execution Retry.");
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callBack(err);
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return;
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}
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break;
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case 'Operation Failed': { // This is an unexpected exception that we do not know how to handle.
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logger.write("[ERROR] getPositionsAtExchange -> onResponse -> Operation Failed. Aborting the process.");
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callBack(err);
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return;
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}
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break;
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}
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}
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} catch (err) {
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logger.write("[ERROR] getPositionsAtExchange -> err = " + err);
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callBack("Operation Failed");
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}
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}
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function ordersExecutionCheck(callBack) {
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try {
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/*
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Here we check that all the positions we know we have are still at the exchange. If they are not, we will try to take appropiate
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actions. Reasons why the positions might not be there are:
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1. The user / account owner closed the positions manually.
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2. The exchange for some eventuality closed the positions. In some exchanges positions have an expiratin time.
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3. The orders were executed.
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For as 1 and 2 are similar unexpected situations and we will stop the bot execution when we detect we are there. Number 3 is an
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expected behaviour and we take appropiate action.
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Also, the position might still be there but it might have been partially executed. To detect that we need to compare the
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position amounts we have on file to the one we are receiving from the exchange.
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Before we begin, we have to remove all the orders that have been already closed at the last execution of the bot.
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*/
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let openPositions = [];
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for (let a = 0; a < botContext.executionContext.positions.length; a++) {
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if (botContext.executionContext.positions[a].status === "open") {
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openPositions.push(botContext.executionContext.positions[a]);
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}
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}
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botContext.executionContext.positions = openPositions;
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/* Now we can start checking what happened at the exchange. */
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let i = 0;
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controlLoop();
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function loopBody() {
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try {
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for (let j = 0; j < exchangePositions.length; j++) {
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if (botContext.executionContext.positions[i].id === exchangePositions[j].id) {
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/*
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We need to know if the order was partially executed. To know that, we compare the amounts on file with the ones
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received from the exchange. If they are the same, then the order is intact. Otherwise, to confirm a partial execution,
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we will request the associated trades from the exchange.
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*/
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if (botContext.executionContext.positions[i].amountB === parseFloat(exchangePositions[j].amountB)) {
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/* Position is still there, untouched. Nothing to do here. */
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next();
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return;
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} else {
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getPositionTradesAtExchange(botContext.executionContext.positions[i].id, confirmOrderWasPartiallyExecuted);
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return;
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function confirmOrderWasPartiallyExecuted(pTrades) {
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try {
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/*
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To confirm everything is ok, we will add all the amounts on trades plus the remaining amounts
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at the order at the exchange and they must be equal to the one on file. Otherwise something very strange could
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have happened, in which case we will halt the bot execution.
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*/
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let sumAssetA = 0;
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let sumAssetB = 0;
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for (k = 0; k < pTrades.length; k++) {
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sumAssetA = sumAssetA + pTrades[k].amountA;
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sumAssetB = sumAssetB + pTrades[k].amountB;
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}
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/* To this we add the current position amounts. */
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sumAssetA = sumAssetA + exchangePositions[j].amountA;
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sumAssetB = sumAssetB + exchangePositions[j].amountB;
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/* And finally we add the fees */
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sumAssetA = sumAssetA + exchangePositions[j].fee;
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if (
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botContext.executionContext.positions[i].amountA !== sumAssetA ||
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botContext.executionContext.positions[i].amountB !== sumAssetB
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) {
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logger.write("[ERROR] ordersExecutionCheck -> loopBody -> confirmOrderWasPartiallyExecuted -> Cannot be confirmed that a partially execution was done well.");
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callBack("Operation Failed");
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return;
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}
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/*
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Confirmed that order was partially executed. Next thing to do is to remember the trades and the new position.
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*/
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botContext.executionContext.positions[i].amountA = exchangePositions[j].amountA;
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botContext.executionContext.positions[i].amountB = exchangePositions[j].amountB;
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botContext.executionContext.positions[i].date = (new Date(exchangePositions[j].date)).valueOf();
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for (k = 0; k < pTrades.length; k++) {
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botContext.executionContext.positions[i].pTrades.push(pTrades[k]);
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botContext.newHistoryRecord.newTrades++;
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}
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let newTransaction = {
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type: botContext.executionContext.positions[i].type + " partially executed",
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position: botContext.executionContext.positions[i]
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};
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botContext.executionContext.transactions.push(newTransaction);
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/* All done. */
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next();
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} catch (err) {
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logger.write("[ERROR] ordersExecutionCheck -> loopBody -> confirmOrderWasPartiallyExecuted -> err = " + err);
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callBack("Operation Failed");
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return;
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}
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}
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}
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}
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}
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/* Position not found: we need to know if the order was executed. */
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getPositionTradesAtExchange(botContext.executionContext.positions[i].id, confirmOrderWasExecuted);
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function confirmOrderWasExecuted(pTrades) {
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try {
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/*
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To confirm everything is ok, we will add all the amounts on trades asociated to the order and
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they must be equal to the one on file. Otherwise something very strange could have happened,
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in which case we will halt the bot execution.
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*/
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let sumAssetA = 0;
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let sumAssetB = 0;
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for (k = 0; k < pTrades.length; k++) {
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sumAssetA = sumAssetA + pTrades[k].amountA;
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sumAssetB = sumAssetB + pTrades[k].amountB;
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}
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/* We add the fees */
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sumAssetA = sumAssetA + exchangePositions[j].fee;
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if (
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botContext.executionContext.positions[i].amountA !== sumAssetA ||
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botContext.executionContext.positions[i].amountB !== sumAssetB
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) {
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logger.write("[ERROR] ordersExecutionCheck -> loopBody -> confirmOrderWasExecuted -> Cannot be confirmed that the order was executed. It must be manually cancelled by the user or cancelled by the exchange itself.");
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callBack("Operation Failed");
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return;
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}
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/*
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Confirmed that order was executed. Next thing to do is to remember the trades and change its status.
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*/
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botContext.executionContext.positions[i].status = "executed";
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for (k = 0; k < pTrades.length; k++) {
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botContext.executionContext.positions[i].pTrades.push(pTrades[k]);
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botContext.newHistoryRecord.newTrades++;
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}
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let newTransaction = {
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type: botContext.executionContext.positions[i].type + " executed",
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position: botContext.executionContext.positions[i]
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};
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botContext.executionContext.transactions.push(newTransaction);
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/* All done. */
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next();
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} catch (err) {
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logger.write("[ERROR] ordersExecutionCheck -> loopBody -> confirmOrderWasExecuted -> err = " + err);
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callBack("Operation Failed");
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return;
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}
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}
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function getPositionTradesAtExchange(pPositionId, innerCallBack) {
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try {
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/*
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Given one position, we request all the associated trades to it.
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*/
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exchangeAPI.getExecutedTrades(pPositionId, onResponse);
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function onResponse(err, pTrades) {
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try {
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switch (err) {
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case null: { // Everything went well, we have the information requested.
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innerCallBack(pTrades);
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}
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break;
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case 'Retry Later': { // Something bad happened, but if we retry in a while it might go through the next time.
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logger.write("[ERROR] ordersExecutionCheck -> loopBody -> getPositionTradesAtExchange -> onResponse -> Retry Later. Requesting Execution Retry.");
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callBack('Retry Later');
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return;
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}
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break;
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case 'Operation Failed': { // This is an unexpected exception that we do not know how to handle.
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logger.write("[ERROR] ordersExecutionCheck -> loopBody -> getPositionTradesAtExchange -> onResponse -> Operation Failed. Aborting the process.");
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callBack('Operation Failed');
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return;
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}
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break;
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}
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} catch (err) {
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logger.write("[ERROR] ordersExecutionCheck -> loopBody -> getPositionTradesAtExchange -> onResponse -> err = " + err);
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callBack("Operation Failed");
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}
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}
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} catch (err) {
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logger.write("[ERROR] ordersExecutionCheck -> loopBody -> getPositionTradesAtExchange -> err = " + err);
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callBack("Operation Failed");
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}
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}
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} catch (err) {
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logger.write("[ERROR] ordersExecutionCheck -> loopBody -> err = " + err);
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callBack("Operation Failed");
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return;
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}
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}
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function next() {
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i++;
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controlLoop();
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}
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function controlLoop() {
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if (i < botContext.executionContext.positions.length) {
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loopBody();
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} else {
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final();
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}
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}
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function final() {
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callBack(null);
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}
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} catch (err) {
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logger.write("[ERROR] ordersExecutionCheck -> err = " + err);
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callBack("Operation Failed");
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}
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}
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function putPositionAtExchange(pType, pRate, pAmountA, pAmountB, callBack) {
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try {
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exchangeAPI.putPosition(MARKET, pType, pRate, pAmountA, pAmountB, onResponse);
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function onResponse(err, pPositionId) {
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try {
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switch (err) {
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case null: { // Everything went well, we have the information requested.
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let position = {
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id: pPositionId,
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type: pType,
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rate: pRate,
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amountA: pAmountA,
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amountB: pAmountB,
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date: (processDatetime.valueOf()),
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status: "open",
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trades: []
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};
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botContext.executionContext.positions.push(position);
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let newTransaction = {
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type: "newPosition",
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position: position
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};
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botContext.executionContext.transactions.push(newTransaction);
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botContext.newHistoryRecord.newPositions++;
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botContext.newHistoryRecord.rate = pRate;
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callBack(null);
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}
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break;
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case 'Retry Later': { // Something bad happened, but if we retry in a while it might go through the next time.
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logger.write("[ERROR] putPositionAtExchange -> onResponse -> Retry Later. Requesting Execution Retry.");
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callBack('Retry Later');
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return;
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}
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break;
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case 'Operation Failed': { // This is an unexpected exception that we do not know how to handle.
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logger.write("[ERROR] putPositionAtExchange -> onResponse -> Operation Failed. Aborting the process.");
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callBack('Operation Failed');
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return;
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}
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break;
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}
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} catch (err) {
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logger.write("[ERROR] putPositionAtExchange -> onResponse -> err = " + err);
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callBack("Operation Failed");
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}
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}
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} catch (err) {
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logger.write("[ERROR] putPositionAtExchange -> err = " + err);
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callBack("Operation Failed");
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}
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}
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function movePositionAtExchange(pPosition, pNewRate, callBack) {
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try {
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exchangeAPI.movePosition(pPosition, pNewRate, onResponse);
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function onResponse(err, pPositionId) {
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try {
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switch (err) {
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case null: { // Everything went well, we have the information requested.
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let newPosition = {
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id: pPositionId,
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type: pPosition.type,
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rate: pNewRate,
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amountA: pPosition.amountB * pNewRate,
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amountB: pPosition.amountB,
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date: (processDatetime.valueOf()),
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status: "open",
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trades: []
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};
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let oldPosition = JSON.parse(JSON.stringify(pPosition));
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/* We need to update the position we have on file. */
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for (let i = 0; i < botContext.executionContext.positions.length; i++) {
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if (botContext.executionContext.positions[i].id === pPosition.id) {
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botContext.executionContext.positions[i] = newPosition;
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break;
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}
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}
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let newTransaction = {
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type: "movePosition",
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oldPosition: oldPosition,
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newPosition: newPosition
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};
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botContext.executionContext.transactions.push(newTransaction);
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botContext.newHistoryRecord.movedPositions++;
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botContext.newHistoryRecord.rate = pNewRate;
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callBack(null);
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}
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break;
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case 'Retry Later': { // Something bad happened, but if we retry in a while it might go through the next time.
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logger.write("[ERROR] movePositionAtExchange -> onResponse -> Retry Later. Requesting Execution Retry.");
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callBack('Retry Later');
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return;
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}
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break;
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case 'Operation Failed': { // This is an unexpected exception that we do not know how to handle.
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logger.write("[ERROR] movePositionAtExchange -> onResponse -> Operation Failed. Aborting the process.");
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callBack('Operation Failed');
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return;
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}
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break;
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}
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} catch (err) {
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logger.write("[ERROR] movePositionAtExchange -> onResponse -> err = " + err);
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callBack("Operation Failed");
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}
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}
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} catch (err) {
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logger.write("[ERROR] movePositionAtExchange -> err = " + err);
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callBack("Operation Failed");
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}
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}
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}; |