Merge pull request #340 from bigcapitalhq/big-65-get-realtime-exchange-rate-from-third-party-service

feat: get latest exchange rate from third party services

.env.example

@@ -57,4 +57,10 @@ GOTENBERG_DOCS_URL=http://server:3000/public/
 
 # Gotenberg API - (development)
 # GOTENBERG_URL=http://localhost:9000
-# GOTENBERG_DOCS_URL=http://host.docker.internal:3000/public/
+# GOTENBERG_DOCS_URL=http://host.docker.internal:3000/public/
+
+# Exchange Rate Service
+EXCHANGE_RATE_SERVICE=open-exchange-rate
+
+# Open Exchange Rate
+OPEN_EXCHANGE_RATE_APP_ID=

packages/server/src/api/controllers/ExchangeRates.ts

@@ -1,19 +1,16 @@
 import { Service, Inject } from 'typedi';
 import { Router, Request, Response, NextFunction } from 'express';
-import { check, param, query } from 'express-validator';
+import { query, oneOf } from 'express-validator';
 import asyncMiddleware from '@/api/middleware/asyncMiddleware';
 import BaseController from './BaseController';
 import { ServiceError } from '@/exceptions';
-import ExchangeRatesService from '@/services/ExchangeRates/ExchangeRatesService';
+import { EchangeRateErrors } from '@/lib/ExchangeRate/types';
-import DynamicListingService from '@/services/DynamicListing/DynamicListService';
+import { ExchangeRateApplication } from '@/services/ExchangeRates/ExchangeRateApplication';
 
 @Service()
 export default class ExchangeRatesController extends BaseController {
   @Inject()
-  exchangeRatesService: ExchangeRatesService;
+  private exchangeRatesApp: ExchangeRateApplication;
-
-  @Inject()
-  dynamicListService: DynamicListingService;
 
   /**
    * Constructor method.
@@ -22,164 +19,40 @@ export default class ExchangeRatesController extends BaseController {
     const router = Router();
 
     router.get(
-      '/',
+      '/latest',
-      [...this.exchangeRatesListSchema],
+      [
+        oneOf([
+          query('to_currency').exists().isString().isISO4217(),
+          query('from_currency').exists().isString().isISO4217(),
+        ]),
+      ],
       this.validationResult,
-      asyncMiddleware(this.exchangeRates.bind(this)),
+      asyncMiddleware(this.latestExchangeRate.bind(this)),
-      this.dynamicListService.handlerErrorsToResponse,
-      this.handleServiceError,
-    );
-    router.post(
-      '/',
-      [...this.exchangeRateDTOSchema],
-      this.validationResult,
-      asyncMiddleware(this.addExchangeRate.bind(this)),
-      this.handleServiceError
-    );
-    router.post(
-      '/:id',
-      [...this.exchangeRateEditDTOSchema, ...this.exchangeRateIdSchema],
-      this.validationResult,
-      asyncMiddleware(this.editExchangeRate.bind(this)),
-      this.handleServiceError
-    );
-    router.delete(
-      '/:id',
-      [...this.exchangeRateIdSchema],
-      this.validationResult,
-      asyncMiddleware(this.deleteExchangeRate.bind(this)),
       this.handleServiceError
     );
     return router;
   }
 
-  get exchangeRatesListSchema() {
-    return [
-      query('page').optional().isNumeric().toInt(),
-      query('page_size').optional().isNumeric().toInt(),
-
-      query('column_sort_by').optional(),
-      query('sort_order').optional().isIn(['desc', 'asc']),
-    ];
-  }
-
-  get exchangeRateDTOSchema() {
-    return [
-      check('exchange_rate').exists().isNumeric().toFloat(),
-      check('currency_code').exists().trim().escape(),
-      check('date').exists().isISO8601(),
-    ];
-  }
-
-  get exchangeRateEditDTOSchema() {
-    return [check('exchange_rate').exists().isNumeric().toFloat()];
-  }
-
-  get exchangeRateIdSchema() {
-    return [param('id').isNumeric().toInt()];
-  }
-
-  get exchangeRatesIdsSchema() {
-    return [
-      query('ids').isArray({ min: 2 }),
-      query('ids.*').isNumeric().toInt(),
-    ];
-  }
-
   /**
    * Retrieve exchange rates.
    * @param {Request} req
    * @param {Response} res
    * @param {NextFunction} next
    */
-  async exchangeRates(req: Request, res: Response, next: NextFunction) {
+  private async latestExchangeRate(
+    req: Request,
+    res: Response,
+    next: NextFunction
+  ) {
     const { tenantId } = req;
-    const filter = {
+    const exchangeRateQuery = this.matchedQueryData(req);
-      page: 1,
-      pageSize: 12,
-      filterRoles: [],
-      columnSortBy: 'created_at',
-      sortOrder: 'asc',
-      ...this.matchedQueryData(req),
-    };
-    if (filter.stringifiedFilterRoles) {
-      filter.filterRoles = JSON.parse(filter.stringifiedFilterRoles);
-    }
-    try {
-      const exchangeRates = await this.exchangeRatesService.listExchangeRates(
-        tenantId,
-        filter
-      );
-      return res.status(200).send({ exchange_rates: exchangeRates });
-    } catch (error) {
-      next(error);
-    }
-  }
-
-  /**
-   * Adds a new exchange rate on the given date.
-   * @param {Request} req
-   * @param {Response} res
-   * @param {NextFunction} next
-   */
-  async addExchangeRate(req: Request, res: Response, next: NextFunction) {
-    const { tenantId } = req;
-    const exchangeRateDTO = this.matchedBodyData(req);
 
     try {
-      const exchangeRate = await this.exchangeRatesService.newExchangeRate(
+      const exchangeRate = await this.exchangeRatesApp.latest(
         tenantId,
-        exchangeRateDTO
+        exchangeRateQuery
       );
-      return res.status(200).send({ id: exchangeRate.id });
+      return res.status(200).send(exchangeRate);
-    } catch (error) {
-      next(error);
-    }
-  }
-
-  /**
-   * Edit the given exchange rate.
-   * @param {Request} req
-   * @param {Response} res
-   * @param {NextFunction} next
-   */
-  async editExchangeRate(req: Request, res: Response, next: NextFunction) {
-    const { tenantId } = req;
-    const { id: exchangeRateId } = req.params;
-    const exchangeRateDTO = this.matchedBodyData(req);
-
-    try {
-      const exchangeRate = await this.exchangeRatesService.editExchangeRate(
-        tenantId,
-        exchangeRateId,
-        exchangeRateDTO
-      );
-
-      return res.status(200).send({
-        id: exchangeRateId,
-        message: 'The exchange rate has been edited successfully.',
-      });
-    } catch (error) {
-      next(error);
-    }
-  }
-
-  /**
-   * Delete the given exchange rate from the storage.
-   * @param {Request} req
-   * @param {Response} res
-   * @param {NextFunction} next
-   */
-  async deleteExchangeRate(req: Request, res: Response, next: NextFunction) {
-    const { tenantId } = req;
-    const { id: exchangeRateId } = req.params;
-
-    try {
-      await this.exchangeRatesService.deleteExchangeRate(
-        tenantId,
-        exchangeRateId
-      );
-      return res.status(200).send({ id: exchangeRateId });
     } catch (error) {
       next(error);
     }
@@ -192,26 +65,56 @@ export default class ExchangeRatesController extends BaseController {
    * @param {Response} res
    * @param {NextFunction} next
    */
-  handleServiceError(
+  private handleServiceError(
     error: Error,
     req: Request,
     res: Response,
     next: NextFunction
   ) {
     if (error instanceof ServiceError) {
-      if (error.errorType === 'EXCHANGE_RATE_NOT_FOUND') {
+      if (EchangeRateErrors.EX_RATE_INVALID_BASE_CURRENCY === error.errorType) {
-        return res.status(404).send({
-          errors: [{ type: 'EXCHANGE.RATE.NOT.FOUND', code: 200 }],
-        });
-      }
-      if (error.errorType === 'NOT_FOUND_EXCHANGE_RATES') {
         return res.status(400).send({
-          errors: [{ type: 'EXCHANGE.RATES.IS.NOT.FOUND', code: 100 }],
+          errors: [
+            {
+              type: EchangeRateErrors.EX_RATE_INVALID_BASE_CURRENCY,
+              code: 100,
+              message: 'The given base currency is invalid.',
+            },
+          ],
         });
-      }
+      } else if (
-      if (error.errorType === 'EXCHANGE_RATE_PERIOD_EXISTS') {
+        EchangeRateErrors.EX_RATE_SERVICE_NOT_ALLOWED === error.errorType
+      ) {
         return res.status(400).send({
-          errors: [{ type: 'EXCHANGE.RATE.PERIOD.EXISTS', code: 300 }],
+          errors: [
+            {
+              type: EchangeRateErrors.EX_RATE_SERVICE_NOT_ALLOWED,
+              code: 200,
+              message: 'The service is not allowed',
+            },
+          ],
+        });
+      } else if (
+        EchangeRateErrors.EX_RATE_SERVICE_API_KEY_REQUIRED === error.errorType
+      ) {
+        return res.status(400).send({
+          errors: [
+            {
+              type: EchangeRateErrors.EX_RATE_SERVICE_API_KEY_REQUIRED,
+              code: 300,
+              message: 'The API key is required',
+            },
+          ],
+        });
+      } else if (EchangeRateErrors.EX_RATE_LIMIT_EXCEEDED === error.errorType) {
+        return res.status(400).send({
+          errors: [
+            {
+              type: EchangeRateErrors.EX_RATE_LIMIT_EXCEEDED,
+              code: 400,
+              message: 'The API rate limit has been exceeded',
+            },
+          ],
         });
       }
     }

packages/server/src/config/index.ts

@@ -169,4 +169,14 @@ module.exports = {
    * to application detarmines to upgrade.
    */
   databaseBatch: 4,
+
+  /**
+   * Exchange rate.
+   */
+  exchangeRate: {
+    service: 'open-exchange-rate',
+    openExchangeRate: {
+      appId: process.env.OPEN_EXCHANGE_RATE_APP_ID,
+    }
+  }
 };

packages/server/src/interfaces/ExchangeRate.ts

@@ -1,36 +1,10 @@
-import { IFilterRole } from './DynamicFilter';
+export interface ExchangeRateLatestDTO {
+  toCurrency: string;
+  fromCurrency: string;
+}
 
-export interface IExchangeRate {
+export interface EchangeRateLatestPOJO {
-  id: number,
+  baseCurrency: string;
-  currencyCode: string,
+  toCurrency: string;
-  exchangeRate: number,
+  exchangeRate: number;
-  date: Date,
+}
-  createdAt: Date,
-  updatedAt: Date,
-};
-
-export interface IExchangeRateDTO {
-  currencyCode: string,
-  exchangeRate: number,
-  date: Date,
-};
-
-export interface IExchangeRateEditDTO {
-  exchangeRate: number,
-};
-
-export interface IExchangeRateFilter {
-  page: number,
-  pageSize: number,
-  filterRoles?: IFilterRole[];
-  columnSortBy: string;
-  sortOrder: string;
-};
-
-export interface IExchangeRatesService {
-  newExchangeRate(tenantId: number, exchangeRateDTO: IExchangeRateDTO): Promise<IExchangeRate>;
-  editExchangeRate(tenantId: number, exchangeRateId: number, editExRateDTO: IExchangeRateEditDTO): Promise<void>;
-
-  deleteExchangeRate(tenantId: number, exchangeRateId: number): Promise<void>;
-  listExchangeRates(tenantId: number, exchangeRateFilter: IExchangeRateFilter): Promise<void>;
-};

packages/server/src/lib/ExchangeRate/ExchangeRate.ts

@@ -0,0 +1,45 @@
+import { OpenExchangeRate } from './OpenExchangeRate';
+import { ExchangeRateServiceType, IExchangeRateService } from './types';
+
+export class ExchangeRate {
+  private exchangeRateService: IExchangeRateService;
+  private exchangeRateServiceType: ExchangeRateServiceType;
+
+  /**
+   * Constructor method.
+   * @param {ExchangeRateServiceType} service
+   */
+  constructor(service: ExchangeRateServiceType) {
+    this.exchangeRateServiceType = service;
+    this.initService();
+  }
+
+  /**
+   * Initialize the exchange rate service based on the service type.
+   */
+  private initService() {
+    if (
+      this.exchangeRateServiceType === ExchangeRateServiceType.OpenExchangeRate
+    ) {
+      this.setExchangeRateService(new OpenExchangeRate());
+    }
+  }
+
+  /**
+   * Sets the exchange rate service.
+   * @param {IExchangeRateService} service
+   */
+  private setExchangeRateService(service: IExchangeRateService) {
+    this.exchangeRateService = service;
+  }
+
+  /**
+   * Gets the latest exchange rate.
+   * @param {string} baseCurrency
+   * @param {string} toCurrency
+   * @returns {number}
+   */
+  public latest(baseCurrency: string, toCurrency: string): Promise<number> {
+    return this.exchangeRateService.latest(baseCurrency, toCurrency);
+  }
+}

packages/server/src/lib/ExchangeRate/OpenExchangeRate.ts

@@ -0,0 +1,81 @@
+import Axios, { AxiosError } from 'axios';
+import {
+  EchangeRateErrors,
+  IExchangeRateService,
+  OPEN_EXCHANGE_RATE_LATEST_URL,
+} from './types';
+import config from '@/config';
+import { ServiceError } from '@/exceptions';
+
+export class OpenExchangeRate implements IExchangeRateService {
+  /**
+   * Gets the latest exchange rate.
+   * @param {string} baseCurrency
+   * @param {string} toCurrency
+   * @returns {Promise<number}
+   */
+  public async latest(
+    baseCurrency: string,
+    toCurrency: string
+  ): Promise<number> {
+    // Vaclidates the Open Exchange Rate api id early.
+    this.validateApiIdExistance();
+
+    try {
+      const result = await Axios.get(OPEN_EXCHANGE_RATE_LATEST_URL, {
+        params: {
+          app_id: config.exchangeRate.openExchangeRate.appId,
+          base: baseCurrency,
+          symbols: toCurrency,
+        },
+      });
+      return result.data.rates[toCurrency] || (1 as number);
+    } catch (error) {
+      this.handleLatestErrors(error);
+    }
+  }
+
+  /**
+   * Validates the Open Exchange Rate api id.
+   * @throws {ServiceError}
+   */
+  private validateApiIdExistance() {
+    const apiId = config.exchangeRate.openExchangeRate.appId;
+
+    if (!apiId) {
+      throw new ServiceError(
+        EchangeRateErrors.EX_RATE_SERVICE_API_KEY_REQUIRED,
+        'Invalid App ID provided. Please sign up at https://openexchangerates.org/signup, or contact support@openexchangerates.org.'
+      );
+    }
+  }
+
+  /**
+   * Handles the latest errors.
+   * @param {any} error
+   * @throws {ServiceError}
+   */
+  private handleLatestErrors(error: any) {
+    if (error.response.data?.message === 'missing_app_id') {
+      throw new ServiceError(
+        EchangeRateErrors.EX_RATE_SERVICE_API_KEY_REQUIRED,
+        'Invalid App ID provided. Please sign up at https://openexchangerates.org/signup, or contact support@openexchangerates.org.'
+      );
+    } else if (error.response.data?.message === 'invalid_app_id') {
+      throw new ServiceError(
+        EchangeRateErrors.EX_RATE_SERVICE_API_KEY_REQUIRED,
+        'Invalid App ID provided. Please sign up at https://openexchangerates.org/signup, or contact support@openexchangerates.org.'
+      );
+    } else if (error.response.data?.message === 'not_allowed') {
+      throw new ServiceError(
+        EchangeRateErrors.EX_RATE_SERVICE_NOT_ALLOWED,
+        'Getting the exchange rate from the given base currency to the given currency is not allowed.'
+      );
+    } else if (error.response.data?.message === 'invalid_base') {
+      throw new ServiceError(
+        EchangeRateErrors.EX_RATE_INVALID_BASE_CURRENCY,
+        'The given base currency is invalid.'
+      );
+    }
+  }
+}

packages/server/src/lib/ExchangeRate/types.ts

@@ -0,0 +1,17 @@
+export interface IExchangeRateService {
+  latest(baseCurrency: string, toCurrency: string): Promise<number>;
+}
+
+export enum ExchangeRateServiceType {
+  OpenExchangeRate = 'OpenExchangeRate',
+}
+
+export enum EchangeRateErrors {
+  EX_RATE_SERVICE_NOT_ALLOWED = 'EX_RATE_SERVICE_NOT_ALLOWED',
+  EX_RATE_LIMIT_EXCEEDED = 'EX_RATE_LIMIT_EXCEEDED',
+  EX_RATE_SERVICE_API_KEY_REQUIRED = 'EX_RATE_SERVICE_API_KEY_REQUIRED',
+  EX_RATE_INVALID_BASE_CURRENCY = 'EX_RATE_INVALID_BASE_CURRENCY',
+}
+
+export const OPEN_EXCHANGE_RATE_LATEST_URL =
+  'https://openexchangerates.org/api/latest.json';

packages/server/src/services/ExchangeRates/ExchangeRateApplication.ts

@@ -0,0 +1,21 @@
+import { Inject } from 'typedi';
+import { ExchangeRatesService } from './ExchangeRatesService';
+import { EchangeRateLatestPOJO, ExchangeRateLatestDTO } from '@/interfaces';
+
+export class ExchangeRateApplication {
+  @Inject()
+  private exchangeRateService: ExchangeRatesService;
+
+  /**
+   * Gets the latest exchange rate.
+   * @param {number} tenantId
+   * @param {ExchangeRateLatestDTO} exchangeRateLatestDTO
+   * @returns {Promise<EchangeRateLatestPOJO>}
+   */
+  public latest(
+    tenantId: number,
+    exchangeRateLatestDTO: ExchangeRateLatestDTO
+  ): Promise<EchangeRateLatestPOJO> {
+    return this.exchangeRateService.latest(tenantId, exchangeRateLatestDTO);
+  }
+}

packages/server/src/services/ExchangeRates/ExchangeRatesService.ts

@@ -1,193 +1,37 @@
-import moment from 'moment';
+import { Service } from 'typedi';
-import { difference } from 'lodash';
+import { ExchangeRate } from '@/lib/ExchangeRate/ExchangeRate';
-import { Service, Inject } from 'typedi';
+import { ExchangeRateServiceType } from '@/lib/ExchangeRate/types';
-import { ServiceError } from '@/exceptions';
+import { EchangeRateLatestPOJO, ExchangeRateLatestDTO } from '@/interfaces';
-import DynamicListingService from '@/services/DynamicListing/DynamicListService';
+import { TenantMetadata } from '@/system/models';
-import {
-  EventDispatcher,
-  EventDispatcherInterface,
-} from 'decorators/eventDispatcher';
-import {
-  IExchangeRateDTO,
-  IExchangeRate,
-  IExchangeRatesService,
-  IExchangeRateEditDTO,
-  IExchangeRateFilter,
-} from '@/interfaces';
-import TenancyService from '@/services/Tenancy/TenancyService';
-
-const ERRORS = {
-  NOT_FOUND_EXCHANGE_RATES: 'NOT_FOUND_EXCHANGE_RATES',
-  EXCHANGE_RATE_PERIOD_EXISTS: 'EXCHANGE_RATE_PERIOD_EXISTS',
-  EXCHANGE_RATE_NOT_FOUND: 'EXCHANGE_RATE_NOT_FOUND',
-};
 
 @Service()
-export default class ExchangeRatesService implements IExchangeRatesService {
+export class ExchangeRatesService {
-  @Inject('logger')
-  logger: any;
-
-  @EventDispatcher()
-  eventDispatcher: EventDispatcherInterface;
-
-  @Inject()
-  tenancy: TenancyService;
-
-  @Inject()
-  dynamicListService: DynamicListingService;
-
   /**
-   * Creates a new exchange rate.
+   * Gets the latest exchange rate.
    * @param {number} tenantId
-   * @param {IExchangeRateDTO} exchangeRateDTO
+   * @param {number} exchangeRateLatestDTO
-   * @returns {Promise<IExchangeRate>}
+   * @returns {EchangeRateLatestPOJO}
    */
-  public async newExchangeRate(
+  public async latest(
     tenantId: number,
-    exchangeRateDTO: IExchangeRateDTO
+    exchangeRateLatestDTO: ExchangeRateLatestDTO
-  ): Promise<IExchangeRate> {
+  ): Promise<EchangeRateLatestPOJO> {
-    const { ExchangeRate } = this.tenancy.models(tenantId);
+    const organization = await TenantMetadata.query().findOne({ tenantId });
 
-    this.logger.info('[exchange_rates] trying to insert new exchange rate.', {
+    // Assign the organization base currency as a default currency
-      tenantId,
+    // if no currency is provided
-      exchangeRateDTO,
+    const fromCurrency =
-    });
+      exchangeRateLatestDTO.fromCurrency || organization.baseCurrency;
-    await this.validateExchangeRatePeriodExistance(tenantId, exchangeRateDTO);
+    const toCurrency =
+      exchangeRateLatestDTO.toCurrency || organization.baseCurrency;
 
-    const exchangeRate = await ExchangeRate.query().insertAndFetch({
+    const exchange = new ExchangeRate(ExchangeRateServiceType.OpenExchangeRate);
-      ...exchangeRateDTO,
+    const exchangeRate = await exchange.latest(fromCurrency, toCurrency);
-      date: moment(exchangeRateDTO.date).format('YYYY-MM-DD'),
-    });
-    this.logger.info('[exchange_rates] inserted successfully.', {
-      tenantId,
-      exchangeRateDTO,
-    });
-    return exchangeRate;
-  }
 
-  /**
+    return {
-   * Edits the exchange rate details.
+      baseCurrency: fromCurrency,
-   * @param {number} tenantId - Tenant id.
+      toCurrency: exchangeRateLatestDTO.toCurrency,
-   * @param {number} exchangeRateId - Exchange rate id.
+      exchangeRate,
-   * @param {IExchangeRateEditDTO} editExRateDTO - Edit exchange rate DTO.
+    };
-   */
-  public async editExchangeRate(
-    tenantId: number,
-    exchangeRateId: number,
-    editExRateDTO: IExchangeRateEditDTO
-  ): Promise<void> {
-    const { ExchangeRate } = this.tenancy.models(tenantId);
-
-    this.logger.info('[exchange_rates] trying to edit exchange rate.', {
-      tenantId,
-      exchangeRateId,
-      editExRateDTO,
-    });
-    await this.validateExchangeRateExistance(tenantId, exchangeRateId);
-
-    await ExchangeRate.query()
-      .where('id', exchangeRateId)
-      .update({ ...editExRateDTO });
-    this.logger.info('[exchange_rates] exchange rate edited successfully.', {
-      tenantId,
-      exchangeRateId,
-      editExRateDTO,
-    });
-  }
-
-  /**
-   * Deletes the given exchange rate.
-   * @param {number} tenantId - Tenant id.
-   * @param {number} exchangeRateId - Exchange rate id.
-   */
-  public async deleteExchangeRate(
-    tenantId: number,
-    exchangeRateId: number
-  ): Promise<void> {
-    const { ExchangeRate } = this.tenancy.models(tenantId);
-    await this.validateExchangeRateExistance(tenantId, exchangeRateId);
-
-    await ExchangeRate.query().findById(exchangeRateId).delete();
-  }
-
-  /**
-   * Listing exchange rates details.
-   * @param {number} tenantId - Tenant id.
-   * @param {IExchangeRateFilter} exchangeRateFilter - Exchange rates list filter.
-   */
-  public async listExchangeRates(
-    tenantId: number,
-    exchangeRateFilter: IExchangeRateFilter
-  ): Promise<void> {
-    const { ExchangeRate } = this.tenancy.models(tenantId);
-    const dynamicFilter = await this.dynamicListService.dynamicList(
-      tenantId,
-      ExchangeRate,
-      exchangeRateFilter
-    );
-    // Retrieve exchange rates by the given query.
-    const exchangeRates = await ExchangeRate.query()
-      .onBuild((query) => {
-        dynamicFilter.buildQuery()(query);
-      })
-      .pagination(exchangeRateFilter.page - 1, exchangeRateFilter.pageSize);
-
-    return exchangeRates;
-  }
-
-  /**
-   * Validates period of the exchange rate existance.
-   * @param {number} tenantId - Tenant id.
-   * @param {IExchangeRateDTO} exchangeRateDTO - Exchange rate DTO.
-   * @return {Promise<void>}
-   */
-  private async validateExchangeRatePeriodExistance(
-    tenantId: number,
-    exchangeRateDTO: IExchangeRateDTO
-  ): Promise<void> {
-    const { ExchangeRate } = this.tenancy.models(tenantId);
-
-    this.logger.info('[exchange_rates] trying to validate period existance.', {
-      tenantId,
-    });
-    const foundExchangeRate = await ExchangeRate.query()
-      .where('currency_code', exchangeRateDTO.currencyCode)
-      .where('date', exchangeRateDTO.date);
-
-    if (foundExchangeRate.length > 0) {
-      this.logger.info('[exchange_rates] given exchange rate period exists.', {
-        tenantId,
-      });
-      throw new ServiceError(ERRORS.EXCHANGE_RATE_PERIOD_EXISTS);
-    }
-  }
-
-  /**
-   * Validate the given echange rate id existance.
-   * @param {number} tenantId - Tenant id.
-   * @param {number} exchangeRateId - Exchange rate id.
-   * @returns {Promise<void>}
-   */
-  private async validateExchangeRateExistance(
-    tenantId: number,
-    exchangeRateId: number
-  ) {
-    const { ExchangeRate } = this.tenancy.models(tenantId);
-
-    this.logger.info(
-      '[exchange_rates] trying to validate exchange rate id existance.',
-      { tenantId, exchangeRateId }
-    );
-    const foundExchangeRate = await ExchangeRate.query().findById(
-      exchangeRateId
-    );
-
-    if (!foundExchangeRate) {
-      this.logger.info('[exchange_rates] exchange rate not found.', {
-        tenantId,
-        exchangeRateId,
-      });
-      throw new ServiceError(ERRORS.EXCHANGE_RATE_NOT_FOUND);
-    }
   }
 }

packages/server/src/system/models/TenantMetadata.ts

@@ -1,6 +1,8 @@
 import BaseModel from 'models/Model';
 
 export default class TenantMetadata extends BaseModel {
+  baseCurrency: string;
+
   /**
    * Table name.
    */

packages/webapp/src/containers/Entries/AutoExchangeProvider.tsx

@@ -1,6 +1,5 @@
-import { useExchangeRate } from '@/hooks/query';
-import { useCurrentOrganization } from '@/hooks/state';
 import React from 'react';
+import { useLatestExchangeRate } from '@/hooks/query';
 
 interface AutoExchangeRateProviderProps {
   children: React.ReactNode;
@@ -18,16 +17,19 @@ const AutoExchangeRateContext = React.createContext(
 function AutoExchangeRateProvider({ children }: AutoExchangeRateProviderProps) {
   const [autoExRateCurrency, setAutoExRateCurrency] =
     React.useState<string>('');
-  const currentOrganization = useCurrentOrganization();
 
   // Retrieves the exchange rate.
   const { data: autoExchangeRate, isLoading: isAutoExchangeRateLoading } =
-    useExchangeRate(autoExRateCurrency, currentOrganization.base_currency, {
+    useLatestExchangeRate(
-      enabled: Boolean(currentOrganization.base_currency && autoExRateCurrency),
+      { fromCurrency: autoExRateCurrency },
-      refetchOnWindowFocus: false,
+      {
-      staleTime: 0,
+        enabled: Boolean(autoExRateCurrency),
-      cacheTime: 0,
+        refetchOnWindowFocus: false,
-    });
+        staleTime: 0,
+        cacheTime: 0,
+        retry: 0,
+      },
+    );
 
   const value = {
     autoExRateCurrency,

packages/webapp/src/containers/Entries/withExRateItemEntriesPriceRecalc.tsx

@@ -98,24 +98,30 @@ interface UseSyncExRateToFormProps {
  */
 export const useSyncExRateToForm = ({ onSynced }: UseSyncExRateToFormProps) => {
   const { setFieldValue, values } = useFormikContext();
-  const { autoExRateCurrency, autoExchangeRate } = useAutoExRateContext();
+  const { autoExRateCurrency, autoExchangeRate, isAutoExchangeRateLoading } =
+    useAutoExRateContext();
   const updateEntriesOnExChange = useUpdateEntriesOnExchangeRateChange();
 
   // Sync the fetched real-time exchanage rate to the form.
   useEffect(() => {
-    if (autoExchangeRate?.exchange_rate && autoExRateCurrency) {
+    if (!isAutoExchangeRateLoading && autoExRateCurrency) {
-      setFieldValue('exchange_rate', autoExchangeRate?.exchange_rate + '');
+      // Sets a default ex. rate to 1 in case the exchange rate service wasn't configured.
+      // or returned an error from the server-side.
+      const exchangeRate = autoExchangeRate?.exchange_rate || 1;
+
+      setFieldValue('exchange_rate', exchangeRate + '');
       setFieldValue(
         'entries',
-        updateEntriesOnExChange(
+        updateEntriesOnExChange(values.exchange_rate, exchangeRate),
-          values.exchange_rate,
-          autoExchangeRate?.exchange_rate,
-        ),
       );
       onSynced?.();
     }
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [autoExchangeRate?.exchange_rate, autoExRateCurrency]);
+  }, [
+    autoExchangeRate?.exchange_rate,
+    autoExRateCurrency,
+    isAutoExchangeRateLoading,
+  ]);
 
   return null;
 };

packages/webapp/src/hooks/query/exchangeRates.tsx

@@ -1,34 +1,36 @@
 // @ts-nocheck
 import { useQuery } from 'react-query';
 import QUERY_TYPES from './types';
+import useApiRequest from '../useRequest';
 
-function getRandomItemFromArray(arr) {
+interface LatestExchangeRateQuery {
-  const randomIndex = Math.floor(Math.random() * arr.length);
+  fromCurrency?: string;
-  return arr[randomIndex];
+  toCurrency?: string;
-}
-function delay(t, val) {
-  return new Promise((resolve) => setTimeout(resolve, t, val));
 }
+
 /**
- * Retrieves tax rates.
+ * Retrieves latest exchange rate.
  * @param {number} customerId - Customer id.
  */
-export function useExchangeRate(
+export function useLatestExchangeRate(
-  fromCurrency: string,
+  { toCurrency, fromCurrency }: LatestExchangeRateQuery,
-  toCurrency: string,
   props,
 ) {
-  return useQuery(
+  const apiRequest = useApiRequest();
-    [QUERY_TYPES.EXCHANGE_RATE, fromCurrency, toCurrency],
-    async () => {
-      await delay(100);
 
-      return {
+  return useQuery(
-        from_currency: fromCurrency,
+    [QUERY_TYPES.EXCHANGE_RATE, toCurrency, fromCurrency],
-        to_currency: toCurrency,
+    () =>
-        exchange_rate: 1.00,
+      apiRequest
-      };
+        .http({
-    },
+          url: `/api/exchange_rates/latest`,
+          method: 'get',
+          params: {
+            to_currency: toCurrency,
+            from_currency: fromCurrency,
+          },
+        })
+        .then((res) => res.data),
     props,
   );
 }