update: refactor create-order endpoint

shared/constants.ts

@@ -0,0 +1 @@
+export const NON_NEGATIVE_REAL_NUMBER_REGEX = /^\d+(\.\d+)?$/;

src/controllers/orders.controller.ts

@@ -1,5 +1,7 @@
 import { Request, Response } from 'express';
 import Decimal from 'decimal.js';
+
+import CreateOrderRes, { CreateOrderErrorCode } from '@/interfaces/responses/orders/CreateOrderRes';
 import candlesModel from '../models/Candles';
 import ordersModel from '../models/Orders';
 import CreateOrderBody from '../interfaces/bodies/orders/CreateOrderBody';
@@ -16,70 +18,97 @@ import Currency from '../schemes/Currency';
 import { validateTokensInput } from '../../shared/utils';
 
 class OrdersController {
-	async createOrder(req: Request, res: Response) {
+	static CURRENCY_DECIMAL_POINT_NOT_FOUND_ERROR_MSG = 'CURRENCY_DECIMAL_POINT_MISSING';
+	async createOrder(req: Request, res: Response<CreateOrderRes>) {
 		try {
-			const { orderData } = req.body as CreateOrderBody;
+			const body = req.body as CreateOrderBody;
+			const { orderData } = body;
+			const { price, amount, pairId } = orderData;
 
-			const isFull =
-				orderData &&
-				orderData?.type &&
-				orderData?.side &&
-				orderData?.price &&
-				orderData?.amount &&
-				orderData?.pairId;
+			const priceDecimal = new Decimal(price);
+			const amountDecimal = new Decimal(amount);
 
-			const priceDecimal = new Decimal(orderData?.price || 0);
-			const amountDecimal = new Decimal(orderData?.amount || 0);
-
-			const pair = await Pair.findByPk(orderData?.pairId);
+			const pair = await Pair.findByPk(pairId);
 
 			const firstCurrency = await Currency.findByPk(pair?.first_currency_id);
 
 			const secondCurrency = await Currency.findByPk(pair?.second_currency_id);
 
 			if (!pair || !firstCurrency || !secondCurrency) {
-				return res.status(400).send({ success: false, data: 'Invalid pair data' });
+				return res.status(400).send({
+					success: false,
+					data: CreateOrderErrorCode.INVALID_ORDER_DATA,
+				});
 			}
 
-			const firstCurrencyDecimalPoint = firstCurrency?.asset_info?.decimal_point || 12;
-			const secondCurrencyDecimalPoint = secondCurrency?.asset_info?.decimal_point || 12;
+			const firstCurrencyDP = firstCurrency.asset_info?.decimal_point;
+			const secondCurrencyDP = secondCurrency.asset_info?.decimal_point;
 
-			const rangeCorrect = (() => {
-				const priceCorrect = validateTokensInput(
-					orderData?.price,
-					secondCurrencyDecimalPoint,
-				).valid;
-				const amountCorrect = validateTokensInput(
-					orderData?.amount,
-					firstCurrencyDecimalPoint,
-				).valid;
-
-				return priceCorrect && amountCorrect;
-			})();
-
-			const priceDecimalPointCorrect = priceDecimal.toString().replace('.', '').length <= 20;
-			const amountDecimalPointCorrect =
-				amountDecimal.toString().replace('.', '').length <= 18;
-
-			if (!priceDecimalPointCorrect || !amountDecimalPointCorrect) {
-				return res.status(400).send({ success: false, data: 'Invalid pair data' });
+			if (firstCurrencyDP === undefined || secondCurrencyDP === undefined) {
+				throw new Error(OrdersController.CURRENCY_DECIMAL_POINT_NOT_FOUND_ERROR_MSG);
 			}
 
-			if (!isFull || !rangeCorrect)
-				return res.status(400).send({ success: false, data: 'Invalid order data' });
+			const totalDecimal = priceDecimal.mul(amountDecimal);
+			const total = totalDecimal.toFixed();
+
+			const isPriceValid = validateTokensInput(price, secondCurrencyDP).valid;
+			const isAmountValid = validateTokensInput(amount, firstCurrencyDP).valid;
+			const isTotalValid = validateTokensInput(total, secondCurrencyDP).valid;
+
+			const areAmountsValid = isPriceValid && isAmountValid && isTotalValid;
+
+			if (!areAmountsValid) {
+				return res.status(400).send({
+					success: false,
+					data: CreateOrderErrorCode.INVALID_ORDER_DATA,
+				});
+			}
 
 			const result = await ordersModel.createOrder(req.body);
 
-			if (result.data === 'Invalid order data') return res.status(400).send(result);
+			if (result.data === 'Invalid order data')
+				return res.status(400).send({
+					success: false,
+					data: CreateOrderErrorCode.INVALID_ORDER_DATA,
+				});
 
-			if (result.data === 'Same order') return res.status(400).send(result);
+			if (result.data === 'Same order')
+				return res.status(400).send({
+					success: false,
+					data: CreateOrderErrorCode.SAME_ORDER,
+				});
 
-			if (result.data === 'Internal error') return res.status(500).send(result);
+			if (result.data === 'Internal error') {
+				throw new Error('orderModel.createOrder returned Internal error');
+			}
 
-			res.status(200).send(result);
+			if (typeof result.data === 'string') {
+				throw new Error('Invalid orderModel.createOrder result');
+			}
+
+			const createdOrder = result.data;
+
+			res.status(200).send({
+				success: true,
+				data: {
+					id: createdOrder.id,
+					type: createdOrder.type,
+					timestamp: createdOrder.timestamp,
+					side: createdOrder.side,
+					price: createdOrder.price,
+					amount: createdOrder.amount,
+					total: createdOrder.total,
+					pair_id: createdOrder.pairId,
+					user_id: createdOrder.userId,
+					status: createdOrder.status,
+					left: createdOrder.left,
+					hasNotification: createdOrder.hasNotification,
+					immediateMatch: createdOrder.immediateMatch,
+				},
+			});
 		} catch (err) {
 			console.log(err);
-			res.status(500).send({ success: false, data: 'Unhandled error' });
+			res.status(500).send({ success: false, data: CreateOrderErrorCode.UNHANDLED_ERROR });
 		}
 	}
 

src/interfaces/bodies/orders/CreateOrderBody.ts

@@ -1,10 +1,24 @@
-import OfferType from '../../common/OfferType';
-import Side from '../../common/Side';
+import { body } from 'express-validator';
+import { NON_NEGATIVE_REAL_NUMBER_REGEX } from 'shared/constants';
 import UserData from '../../common/UserData';
 
-interface OrderData {
-	type: OfferType;
-	side: Side;
+export enum CreateOrderType {
+	// eslint-disable-next-line no-unused-vars
+	BUY = 'buy',
+	// eslint-disable-next-line no-unused-vars
+	SELL = 'sell',
+}
+
+export enum CreateOrderSide {
+	// eslint-disable-next-line no-unused-vars
+	LIMIT = 'limit',
+	// eslint-disable-next-line no-unused-vars
+	MARKET = 'market',
+}
+
+interface CreateOrderData {
+	type: CreateOrderType;
+	side: CreateOrderSide;
 	price: string;
 	amount: string;
 	pairId: string;
@@ -12,7 +26,26 @@ interface OrderData {
 
 interface CreateOrderBody {
 	userData: UserData;
-	orderData: OrderData;
+	orderData: CreateOrderData;
 }
 
+export const createOrderValidator = [
+	body('orderData').isObject().withMessage('orderData must be an object'),
+	body('orderData.type')
+		.isIn(Object.values(CreateOrderType))
+		.withMessage(`Invalid orderData.type value`),
+	body('orderData.side')
+		.isIn(Object.values(CreateOrderSide))
+		.withMessage(`Invalid orderData.side value`),
+	body('orderData.price')
+		.isString()
+		.matches(NON_NEGATIVE_REAL_NUMBER_REGEX)
+		.withMessage('orderData.price must be a positive decimal string'),
+	body('orderData.amount')
+		.isString()
+		.matches(NON_NEGATIVE_REAL_NUMBER_REGEX)
+		.withMessage('orderData.amount must be a positive decimal string'),
+	body('orderData.pairId').isString().withMessage('orderData.pairId must be a string'),
+];
+
 export default CreateOrderBody;

src/interfaces/responses/orders/CreateOrderRes.ts

@@ -0,0 +1,36 @@
+export type CreateOrderSuccessRes = {
+	success: true;
+	data: {
+		hasNotification: boolean;
+		id: number;
+		type: string;
+		timestamp: number;
+		side: string;
+		price: string;
+		amount: string;
+		total: string;
+		pair_id: number;
+		user_id: number;
+		status: string;
+		left: string;
+		immediateMatch?: true;
+	};
+};
+
+export enum CreateOrderErrorCode {
+	// eslint-disable-next-line no-unused-vars
+	INVALID_ORDER_DATA = 'Invalid order data',
+	// eslint-disable-next-line no-unused-vars
+	SAME_ORDER = 'Same order',
+	// eslint-disable-next-line no-unused-vars
+	UNHANDLED_ERROR = 'Unhandled error',
+}
+
+export type CreateOrderErrorRes = {
+	success: false;
+	data: CreateOrderErrorCode;
+};
+
+type CreateOrderRes = CreateOrderSuccessRes | CreateOrderErrorRes;
+
+export default CreateOrderRes;

src/models/Orders.ts

@@ -68,7 +68,30 @@ class OrdersModel {
 		return matchedOrders;
 	}
 
-	async createOrder(body: CreateOrderBody) {
+	async createOrder(body: CreateOrderBody): Promise<
+	| {
+		success: false;
+		data: string;
+		  }
+	| {
+		success: true;
+		data: {
+			id: number;
+			type: string;
+			timestamp: number;
+			side: string;
+			price: string;
+			amount: string;
+			total: string;
+			pairId: number;
+			userId: number;
+			status: string;
+			left: string;
+			hasNotification: boolean;
+			immediateMatch?: true;
+		};
+		  }
+	> {
 		try {
 			const { orderData } = body;
 			const { userData } = body;
@@ -173,13 +196,41 @@ class OrdersModel {
 				return {
 					success: true,
 					data: {
-						...newOrder.toJSON(),
+						id: newOrder.id,
+						type: newOrder.type,
+						timestamp: newOrder.timestamp,
+						side: newOrder.side,
+						price: newOrder.price,
+						amount: newOrder.amount,
+						total: newOrder.total,
+						pairId: newOrder.pair_id,
+						userId: newOrder.user_id,
+						status: newOrder.status,
+						left: newOrder.left,
+						hasNotification: newOrder.hasNotification,
+
 						immediateMatch: true,
 					},
 				};
 			}
 
-			return { success: true, data: newOrder.toJSON() };
+			return {
+				success: true,
+				data: {
+					id: newOrder.id,
+					type: newOrder.type,
+					timestamp: newOrder.timestamp,
+					side: newOrder.side,
+					price: newOrder.price,
+					amount: newOrder.amount,
+					total: newOrder.total,
+					pairId: newOrder.pair_id,
+					userId: newOrder.user_id,
+					status: newOrder.status,
+					left: newOrder.left,
+					hasNotification: newOrder.hasNotification,
+				},
+			};
 		} catch (err) {
 			console.log(err);
 			return { success: false, data: 'Internal error' };

src/routes/orders.router.ts

@@ -1,4 +1,5 @@
 import express from 'express';
+import { createOrderValidator } from '@/interfaces/bodies/orders/CreateOrderBody.js';
 import middleware from '../middleware/middleware.js';
 import ordersController from '../controllers/orders.controller.js';
 
@@ -15,7 +16,11 @@ ordersRouter.use(
 	middleware.verifyToken,
 );
 
-ordersRouter.post('/orders/create', ordersController.createOrder);
+ordersRouter.post(
+	'/orders/create',
+	middleware.expressValidator(createOrderValidator),
+	ordersController.createOrder,
+);
 ordersRouter.post('/orders/get-page', ordersController.getOrdersPage);
 ordersRouter.post('/orders/get-user-page', ordersController.getUserOrdersPage);
 ordersRouter.post('/orders/get', ordersController.getUserOrders);