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metaapi.cloud-sdk

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SDK for MetaApi, a professional cloud forex API which includes MetaTrader REST API and MetaTrader websocket API. Supports both MetaTrader 5 (MT5) and MetaTrader 4 (MT4). CopyFactory copy trading API included. (https://metaapi.cloud)

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'use strict'; function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } } function _async_to_generator(fn) { return function() { var self = this, args = arguments; return new Promise(function(resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; } import TimeoutError from '../clients/timeoutError'; import LoggerManager from '../logger'; import _ from 'lodash'; const realSetTimeout = setTimeout; const realDateNow = Date.now.bind(Date); /** * Creates a promise that can be used as a handle. It will not raise errors when rejected until it is explicitly * awaited or catch is set * @returns modified handle promise */ export function createHandlePromise() { let resolve, reject; let promise = new Promise((res, rej)=>{ resolve = res; reject = rej; }); promise.completed = false; promise.resolve = (result)=>{ if (!promise.completed) { promise.completed = true; promise.resolved = true; promise.result = result; resolve(result); } }; promise.reject = (err)=>{ if (!promise.completed) { promise.completed = true; promise.rejected = true; promise.error = err; reject(err); } }; promise.timeout = (milliseconds, errorMessage)=>{ if (!promise.completed) { let timeout = setTimeout(()=>promise.reject(new TimeoutError(errorMessage)), milliseconds); promise.finally(()=>clearTimeout(timeout)).catch(()=>{}); } return promise; }; promise.catch(()=>{}); return promise; } /** * Wraps a promise into a handle promise * @param promise native promise * @returns handle promise */ export function wrapHandlePromise(promise) { let result = createHandlePromise(); promise.then(result.resolve).catch(()=>{}); promise.catch(result.reject); return result; } /** * This function ensures that a promise is returned * @param call call * @returns promise */ export function ensurePromise(call) { return _ensurePromise.apply(this, arguments); } function _ensurePromise() { _ensurePromise = _async_to_generator(function*(call) { return call(); }); return _ensurePromise.apply(this, arguments); } /** * Waits specified delay * @param ms Milliseconds to wait * @param options Additional options * @return promise resolving when the delay has ended */ export function delay(ms, options) { let resolve; let timeout; let canceled = false; let result = new Promise((res)=>{ timeout = (options === null || options === void 0 ? void 0 : options.ignoreSinonClock) ? realSetTimeout(res, ms) : setTimeout(res, ms); resolve = res; }); Object.defineProperty(result, 'canceled', { get: ()=>canceled, enumerable: true, configurable: true }); result.cancel = ()=>{ canceled = true; clearTimeout(timeout); resolve(); }; return result; } /** * Assembles log4js config from logging level map * @param {Object} [config] log4js config * @param {String} [config.defaultLevel = 'INFO'] Default logging level * @param {Object} [config.levels] Logging levels * @return {Object} Log4js config */ export function assembleLog4jsConfig(config = {}) { let appenders = { console: { type: 'console' } }; let categories = { default: { appenders: Object.keys(appenders), level: config.defaultLevel || 'INFO' } }; Object.keys(config.levels || {}).forEach((category)=>{ categories[category] = { appenders: Object.keys(appenders), level: config.levels[category] }; }); return { appenders, categories }; } /** * Waits untill specified callable will pass successfully and return true. Uses log4js logger named `helpers.wait` * @param {() => boolean|Promise<boolean>} callable Callable to call until it returns true * @param {Number} [intervalInMs = 25] Interval in milliseconds between the checks * @param {WaitOptions & DelayOptions} [options] Additional wait options * @return {Promise} Promise resolving with callable return value when waited * @throws {Error|TimeoutError} Error from the callable or timeout error when timed out */ // eslint-disable-next-line complexity export function wait(callable) { return _wait.apply(this, arguments); } function _wait() { _wait = _async_to_generator(function*(callable, intervalInMs = 25, options) { const logger = LoggerManager.getLogger('helpers.wait'); if (typeof intervalInMs === 'object') { // for backward compatibility options = intervalInMs; intervalInMs = _.defaultTo(options.intervalInMs, 1000); } const dateNow = (options === null || options === void 0 ? void 0 : options.ignoreSinonClock) ? realDateNow : ()=>Date.now(); let result = false, lastError; let timesAt = dateNow() + _.defaultTo(options === null || options === void 0 ? void 0 : options.timeoutInMs, 30000); while(!result && dateNow() < timesAt){ try { result = yield callable(); } catch (err) { lastError = err; logger.debug('The executor failed', err); if (dateNow() >= timesAt) { throw err; } } finally{ if (!result) { logger.debug('Waiting because the result is', result); yield delay(intervalInMs, options); } } } if (dateNow() >= timesAt) { if (lastError) { throw lastError; } throw new TimeoutError('Timed out till specified callable returns true'); } return result; }); return _wait.apply(this, arguments); } /** * Waits untill specified callable will pass successfully and return true. Uses log4js logger named `helpers.wait` * @param {() => boolean|Promise<boolean>} callable Callable to call until it returns true * @param {Number} [intervalInMs = 25] Interval in milliseconds between the checks * @param {WaitOptions & DelayOptions} [options] Additional wait options * @return {Promise} Promise resolving with callable return value when waited * @throws {Error|TimeoutError} Error from the callable or timeout error when timed out */ export function waitTrue(callable, intervalInMs = 25, options) { return wait(callable, intervalInMs, options); } /** * Waits untill specified callable will pass successfully. Uses log4js logger named `helpers.wait` * @param {() => boolean|Promise<boolean>} callable Callable to call * @param {Number} [intervalInMs = 25] Interval in milliseconds between the checks * @param {WaitOptions & DelayOptions} [options] Additional wait options * @return {Promise} Promise resolving with callable return value when waited * @throws {Error|TimeoutError} Error from the callable or timeout error when timed out */ export function waitPass(callable) { return _waitPass.apply(this, arguments); } function _waitPass() { _waitPass = _async_to_generator(function*(callable, intervalInMs = 25, options) { let result; yield wait(/*#__PURE__*/ _async_to_generator(function*() { result = yield callable(); return true; }), intervalInMs, options); return result; }); return _waitPass.apply(this, arguments); } /** * Waits untill specified callable successfully returns any non-undefined value. Uses log4js logger named `helpers.wait` * @param callable Callable to call * @param intervalInMs Interval in milliseconds between the checks * @param options Additional wait options * @return Promise resolving with callable return value when waited * @throws {Error|TimeoutError} Error from the callable or timeout error when timed out */ export function waitAny(callable) { return _waitAny.apply(this, arguments); } function _waitAny() { _waitAny = _async_to_generator(function*(callable, intervalInMs = 25, options) { let result; yield waitTrue(/*#__PURE__*/ _async_to_generator(function*() { result = yield callable(); if (result !== undefined) { return true; } }), intervalInMs, options); return result; }); return _waitAny.apply(this, arguments); } /** * Calculates exponential backoff delay. At the initial iteration, there is no delay. At the next iteration, the delay * is `startDelay`. Further, at the every next iteration the previous delay multiplies to 2 * @param iteration current iteration, where 0 is initial iteration without delaying * @param startDelay start delay * @param maxDelay maximum delay */ export function expBackoffDelay(iteration, startDelay, maxDelay) { if (iteration === 0) { return 0; } return Math.min(startDelay * Math.pow(2, iteration - 1), maxDelay); } //# sourceMappingURL=data:application/json;base64,{"version":3,"sources":["<anon>"],"sourcesContent":["'use strict';\n\nimport TimeoutError from '../clients/timeoutError';\nimport LoggerManager from '../logger';\nimport {PromiseOrNot} from '../types/util';\nimport _ from 'lodash';\n\nconst realSetTimeout = setTimeout;\nconst realDateNow = Date.now.bind(Date);\n\n/** An extended promise with additional properties and methods */\nexport interface HandlePromise<T> extends Promise<T> {\n  /** Whether the promise is resolved or rejected */\n  completed: boolean,\n  /** Whether the promise is resolved */\n  resolved?: boolean,\n  /** Whether the promise is rejected */\n  rejected?: boolean,\n  /** Result value the promise resolved with */\n  result?: T,\n  /** Error the promise rejected with */\n  error?: Error,\n  /**\n   * Resolves the promise with specified value\n   * @param result Value to resolve the promise with\n   */\n  resolve(result?: T): void,\n  /**\n   * Rejects the promise with specified error\n   * @param err Error to reject the promise with\n   */\n  reject(err: Error): void,\n  /**\n   * Adds a timeout to reject the promise with `TimeoutError`\n   * @param milliseconds timeout in milliseconds\n   * @param errorMessage error message\n   * @returns self\n   */\n  timeout(milliseconds: number, errorMessage: string): HandlePromise<T>\n}\n\n/**\n * Creates a promise that can be used as a handle. It will not raise errors when rejected until it is explicitly\n * awaited or catch is set\n * @returns modified handle promise\n */\nexport function createHandlePromise<T>(): HandlePromise<T> {\n  let resolve, reject;\n  let promise = new Promise((res, rej) => {\n    resolve = res;\n    reject = rej;\n  }) as HandlePromise<T>;\n  promise.completed = false;\n  promise.resolve = (result) => {\n    if (!promise.completed) {\n      promise.completed = true;\n      promise.resolved = true;\n      promise.result = result;\n      resolve(result);\n    }\n  };\n  promise.reject = (err) => {\n    if (!promise.completed) {\n      promise.completed = true;\n      promise.rejected = true;\n      promise.error = err;\n      reject(err);\n    }\n  };\n  promise.timeout = (milliseconds, errorMessage) => {\n    if (!promise.completed) {\n      let timeout = setTimeout(() => promise.reject(new TimeoutError(errorMessage)), milliseconds);\n      promise.finally(() => clearTimeout(timeout)).catch(() => {});\n    }\n    return promise;\n  };\n  promise.catch(() => {});\n  return promise;\n}\n\n/**\n * Wraps a promise into a handle promise\n * @param promise native promise\n * @returns handle promise\n */\nexport function wrapHandlePromise<T>(promise: Promise<T>): HandlePromise<T> {\n  let result = createHandlePromise<T>();\n  promise.then(result.resolve).catch(() => {});\n  promise.catch(result.reject);\n  return result;\n}\n\n/**\n * This function ensures that a promise is returned\n * @param call call\n * @returns promise\n */\nexport async function ensurePromise<T>(call: () => PromiseOrNot<T>): Promise<T> {\n  return call();\n}\n\n/** Additional delay options */\nexport type DelayOptions = {\n  /** Whether to delay real time, if a stubbed frozen `sinon` clock is used */\n  ignoreSinonClock?: boolean\n};\n\n/**\n * Waits specified delay\n * @param ms Milliseconds to wait\n * @param options Additional options\n * @return promise resolving when the delay has ended\n */\nexport function delay(ms: number, options?: DelayOptions): DelayPromise {\n  let resolve: () => void;\n  let timeout: NodeJS.Timeout;\n  let canceled = false;\n  let result = new Promise<void>(res => {\n    timeout = options?.ignoreSinonClock ? realSetTimeout(res, ms) : setTimeout(res, ms);\n    resolve = res;\n  }) as DelayPromise;\n  Object.defineProperty(result, 'canceled', {\n    get: () => canceled,\n    enumerable: true,\n    configurable: true\n  });\n  result.cancel = () => {\n    canceled = true;\n    clearTimeout(timeout);\n    resolve();\n  };\n  return result;\n}\n\n/**\n * Delay promise\n */\nexport interface DelayPromise extends Promise<void> {\n  /**\n   * Returns whether the promise is canceled\n   * @returns whether canceled\n   */\n  get canceled(): boolean;\n  /**\n   * Cancels waiting and resolves the promise immediately\n   */\n  cancel(): void;\n}\n\n/**\n * Assembles log4js config from logging level map\n * @param {Object} [config] log4js config\n * @param {String} [config.defaultLevel = 'INFO'] Default logging level\n * @param {Object} [config.levels] Logging levels\n * @return {Object} Log4js config\n */\nexport function assembleLog4jsConfig(config: any = {}) {\n  let appenders = {console: {type: 'console'}};\n  let categories = {\n    default: {\n      appenders: Object.keys(appenders),\n      level: config.defaultLevel || 'INFO'\n    }\n  };\n  Object.keys(config.levels || {}).forEach((category) => {\n    categories[category] = {\n      appenders: Object.keys(appenders),\n      level: config.levels[category]\n    };\n  });\n  return {appenders, categories};\n}\n\n/** Options for `wait*` functions */\nexport type WaitOptions = {\n  /** Wait timeout in milliseconds. Defaults to `30000` */\n  timeoutInMs?: number\n};\n\n/**\n * Waits untill specified callable will pass successfully and return true. Uses log4js logger named `helpers.wait`\n * @param {() => boolean|Promise<boolean>} callable Callable to call until it returns true\n * @param {Number} [intervalInMs = 25] Interval in milliseconds between the checks\n * @param {WaitOptions & DelayOptions} [options] Additional wait options\n * @return {Promise} Promise resolving with callable return value when waited\n * @throws {Error|TimeoutError} Error from the callable or timeout error when timed out\n */\n// eslint-disable-next-line complexity\nexport async function wait(callable, intervalInMs = 25, options?: WaitOptions & DelayOptions) {\n  const logger = LoggerManager.getLogger('helpers.wait');\n  if (typeof intervalInMs === 'object') {\n    // for backward compatibility\n    options = intervalInMs;\n    intervalInMs = _.defaultTo((options as any).intervalInMs, 1000);\n  }\n  const dateNow = options?.ignoreSinonClock ? realDateNow : () => Date.now();\n  let result = false, lastError;\n  let timesAt = dateNow() + _.defaultTo(options?.timeoutInMs, 30000);\n  while (!result && dateNow() < timesAt) {\n    try {\n      result = await callable();\n    } catch (err) {\n      lastError = err;\n      logger.debug('The executor failed', err);\n      if (dateNow() >= timesAt) {\n        throw err;\n      }\n    } finally {\n      if (!result) {\n        logger.debug('Waiting because the result is', result);\n        await delay(intervalInMs, options);\n      }\n    }\n  }\n  if (dateNow() >= timesAt) {\n    if (lastError) {\n      throw lastError;\n    }\n    throw new TimeoutError('Timed out till specified callable returns true');\n  }\n  return result;\n}\n\n/**\n * Waits untill specified callable will pass successfully and return true. Uses log4js logger named `helpers.wait`\n * @param {() => boolean|Promise<boolean>} callable Callable to call until it returns true\n * @param {Number} [intervalInMs = 25] Interval in milliseconds between the checks\n * @param {WaitOptions & DelayOptions} [options] Additional wait options\n * @return {Promise} Promise resolving with callable return value when waited\n * @throws {Error|TimeoutError} Error from the callable or timeout error when timed out\n */\nexport function waitTrue(callable, intervalInMs = 25, options?: WaitOptions & DelayOptions) {\n  return wait(callable, intervalInMs, options);\n}\n\n/**\n * Waits untill specified callable will pass successfully. Uses log4js logger named `helpers.wait`\n * @param {() => boolean|Promise<boolean>} callable Callable to call\n * @param {Number} [intervalInMs = 25] Interval in milliseconds between the checks\n * @param {WaitOptions & DelayOptions} [options] Additional wait options\n * @return {Promise} Promise resolving with callable return value when waited\n * @throws {Error|TimeoutError} Error from the callable or timeout error when timed out\n */\nexport async function waitPass<T = void>(\n  callable: () => PromiseOrNot<T>,\n  intervalInMs = 25,\n  options?: WaitOptions & DelayOptions\n): Promise<T> {\n  let result;\n  await wait(async () => {\n    result = await callable();\n    return true;\n  }, intervalInMs, options);\n  return result;\n}\n\n/**\n * Waits untill specified callable successfully returns any non-undefined value. Uses log4js logger named `helpers.wait`\n * @param callable Callable to call\n * @param intervalInMs Interval in milliseconds between the checks\n * @param options Additional wait options\n * @return Promise resolving with callable return value when waited\n * @throws {Error|TimeoutError} Error from the callable or timeout error when timed out\n */\nexport async function waitAny<T>(\n  callable: () => PromiseOrNot<T>, intervalInMs = 25, options?: WaitOptions\n): Promise<T> {\n  let result: T;\n  await waitTrue(async () => {\n    result = await callable();\n    if (result !== undefined) {\n      return true;\n    }\n  }, intervalInMs, options);\n  return result;\n}\n\n/**\n * Calculates exponential backoff delay. At the initial iteration, there is no delay. At the next iteration, the delay\n * is `startDelay`. 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