src/charging-station/ChargingStation.ts

   1 import { BootNotificationResponse, RegistrationStatus } from '../types/ocpp/Responses';
   2 import ChargingStationConfiguration, { ConfigurationKey } from '../types/ChargingStationConfiguration';
   3 import ChargingStationTemplate, { CurrentOutType, PowerUnits, VoltageOut } from '../types/ChargingStationTemplate';
   4 import { ConnectorPhaseRotation, StandardParametersKey, SupportedFeatureProfiles } from '../types/ocpp/Configuration';
   5 import Connectors, { Connector } from '../types/Connectors';
   6 import { PerformanceObserver, performance } from 'perf_hooks';
   7 import Requests, { AvailabilityType, BootNotificationRequest, IncomingRequest, IncomingRequestCommand } from '../types/ocpp/Requests';
   8 import WebSocket, { MessageEvent } from 'ws';
   9
  10 import AutomaticTransactionGenerator from './AutomaticTransactionGenerator';
  11 import { ChargePointStatus } from '../types/ocpp/ChargePointStatus';
  12 import { ChargingProfile } from '../types/ocpp/ChargingProfile';
  13 import ChargingStationInfo from '../types/ChargingStationInfo';
  14 import Configuration from '../utils/Configuration';
  15 import Constants from '../utils/Constants';
  16 import FileUtils from '../utils/FileUtils';
  17 import { MessageType } from '../types/ocpp/MessageType';
  18 import { MeterValueMeasurand } from '../types/ocpp/MeterValues';
  19 import OCPP16IncomingRequestService from './ocpp/1.6/OCCP16IncomingRequestService';
  20 import OCPP16RequestService from './ocpp/1.6/OCPP16RequestService';
  21 import OCPP16ResponseService from './ocpp/1.6/OCPP16ResponseService';
  22 import OCPPError from './OcppError';
  23 import OCPPIncomingRequestService from './ocpp/OCPPIncomingRequestService';
  24 import OCPPRequestService from './ocpp/OCPPRequestService';
  25 import { OCPPVersion } from '../types/ocpp/OCPPVersion';
  26 import PerformanceStatistics from '../utils/PerformanceStatistics';
  27 import { StopTransactionReason } from '../types/ocpp/Transaction';
  28 import Utils from '../utils/Utils';
  29 import { WebSocketCloseEventStatusCode } from '../types/WebSocket';
  30 import crypto from 'crypto';
  31 import fs from 'fs';
  32 import logger from '../utils/Logger';
  33 import path from 'path';
  34
  35 export default class ChargingStation {
  36   public stationTemplateFile: string;
  37   public authorizedTags: string[];
  38   public stationInfo!: ChargingStationInfo;
  39   public connectors: Connectors;
  40   public configuration!: ChargingStationConfiguration;
  41   public hasStopped: boolean;
  42   public wsConnection!: WebSocket;
  43   public requests: Requests;
  44   public messageQueue: string[];
  45   public performanceStatistics!: PerformanceStatistics;
  46   public heartbeatSetInterval!: NodeJS.Timeout;
  47   public ocppIncomingRequestService!: OCPPIncomingRequestService;
  48   public ocppRequestService!: OCPPRequestService;
  49   private index: number;
  50   private bootNotificationRequest!: BootNotificationRequest;
  51   private bootNotificationResponse!: BootNotificationResponse | null;
  52   private connectorsConfigurationHash!: string;
  53   private supervisionUrl!: string;
  54   private wsConnectionUrl!: string;
  55   private hasSocketRestarted: boolean;
  56   private autoReconnectRetryCount: number;
  57   private automaticTransactionGeneration!: AutomaticTransactionGenerator;
  58   private performanceObserver!: PerformanceObserver;
  59   private webSocketPingSetInterval!: NodeJS.Timeout;
  60
  61   constructor(index: number, stationTemplateFile: string) {
  62     this.index = index;
  63     this.stationTemplateFile = stationTemplateFile;
  64     this.connectors = {} as Connectors;
  65     this.initialize();
  66
  67     this.hasStopped = false;
  68     this.hasSocketRestarted = false;
  69     this.autoReconnectRetryCount = 0;
  70
  71     this.requests = {} as Requests;
  72     this.messageQueue = [] as string[];
  73
  74     this.authorizedTags = this.getAuthorizedTags();
  75   }
  76
  77   public logPrefix(): string {
  78     return Utils.logPrefix(` ${this.stationInfo.chargingStationId} |`);
  79   }
  80
  81   public getRandomTagId(): string {
  82     const index = Math.floor(Math.random() * this.authorizedTags.length);
  83     return this.authorizedTags[index];
  84   }
  85
  86   public hasAuthorizedTags(): boolean {
  87     return !Utils.isEmptyArray(this.authorizedTags);
  88   }
  89
  90   public getEnableStatistics(): boolean | undefined {
  91     return !Utils.isUndefined(this.stationInfo.enableStatistics) ? this.stationInfo.enableStatistics : true;
  92   }
  93
  94   public getNumberOfPhases(): number | undefined {
  95     switch (this.getCurrentOutType()) {
  96       case CurrentOutType.AC:
  97         return !Utils.isUndefined(this.stationInfo.numberOfPhases) ? this.stationInfo.numberOfPhases : 3;
  98       case CurrentOutType.DC:
  99         return 0;
 100     }
 101   }
 102
 103   public isWebSocketOpen(): boolean {
 104     return this.wsConnection?.readyState === WebSocket.OPEN;
 105   }
 106
 107   public isRegistered(): boolean {
 108     return this.bootNotificationResponse?.status === RegistrationStatus.ACCEPTED;
 109   }
 110
 111   public isChargingStationAvailable(): boolean {
 112     return this.getConnector(0).availability === AvailabilityType.OPERATIVE;
 113   }
 114
 115   public isConnectorAvailable(id: number): boolean {
 116     return this.getConnector(id).availability === AvailabilityType.OPERATIVE;
 117   }
 118
 119   public getConnector(id: number): Connector {
 120     return this.connectors[id];
 121   }
 122
 123   public getCurrentOutType(): CurrentOutType | undefined {
 124     return !Utils.isUndefined(this.stationInfo.currentOutType) ? this.stationInfo.currentOutType : CurrentOutType.AC;
 125   }
 126
 127   public getVoltageOut(): number | undefined {
 128     const errMsg = `${this.logPrefix()} Unknown ${this.getCurrentOutType()} currentOutType in template file ${this.stationTemplateFile}, cannot define default voltage out`;
 129     let defaultVoltageOut: number;
 130     switch (this.getCurrentOutType()) {
 131       case CurrentOutType.AC:
 132         defaultVoltageOut = VoltageOut.VOLTAGE_230;
 133         break;
 134       case CurrentOutType.DC:
 135         defaultVoltageOut = VoltageOut.VOLTAGE_400;
 136         break;
 137       default:
 138         logger.error(errMsg);
 139         throw Error(errMsg);
 140     }
 141     return !Utils.isUndefined(this.stationInfo.voltageOut) ? this.stationInfo.voltageOut : defaultVoltageOut;
 142   }
 143
 144   public getTransactionIdTag(transactionId: number): string | undefined {
 145     for (const connector in this.connectors) {
 146       if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector)).transactionId === transactionId) {
 147         return this.getConnector(Utils.convertToInt(connector)).idTag;
 148       }
 149     }
 150   }
 151
 152   public getOutOfOrderEndMeterValues(): boolean {
 153     return this.stationInfo.outOfOrderEndMeterValues ?? false;
 154   }
 155
 156   public getBeginEndMeterValues(): boolean {
 157     return this.stationInfo.beginEndMeterValues ?? false;
 158   }
 159
 160   public getMeteringPerTransaction(): boolean {
 161     return this.stationInfo.meteringPerTransaction ?? true;
 162   }
 163
 164   public getTransactionDataMeterValues(): boolean {
 165     return this.stationInfo.transactionDataMeterValues ?? false;
 166   }
 167
 168   public getEnergyActiveImportRegisterByTransactionId(transactionId: number): number | undefined {
 169     if (this.getMeteringPerTransaction()) {
 170       for (const connector in this.connectors) {
 171         if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector)).transactionId === transactionId) {
 172           return this.getConnector(Utils.convertToInt(connector)).transactionEnergyActiveImportRegisterValue;
 173         }
 174       }
 175     }
 176     for (const connector in this.connectors) {
 177       if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector)).transactionId === transactionId) {
 178         return this.getConnector(Utils.convertToInt(connector)).energyActiveImportRegisterValue;
 179       }
 180     }
 181   }
 182
 183   public getEnergyActiveImportRegisterByConnectorId(connectorId: number): number | undefined {
 184     if (this.getMeteringPerTransaction()) {
 185       return this.getConnector(connectorId).transactionEnergyActiveImportRegisterValue;
 186     }
 187     return this.getConnector(connectorId).energyActiveImportRegisterValue;
 188   }
 189
 190   public getAuthorizeRemoteTxRequests(): boolean {
 191     const authorizeRemoteTxRequests = this.getConfigurationKey(StandardParametersKey.AuthorizeRemoteTxRequests);
 192     return authorizeRemoteTxRequests ? Utils.convertToBoolean(authorizeRemoteTxRequests.value) : false;
 193   }
 194
 195   public getLocalAuthListEnabled(): boolean {
 196     const localAuthListEnabled = this.getConfigurationKey(StandardParametersKey.LocalAuthListEnabled);
 197     return localAuthListEnabled ? Utils.convertToBoolean(localAuthListEnabled.value) : false;
 198   }
 199
 200   public restartWebSocketPing(): void {
 201     // Stop WebSocket ping
 202     this.stopWebSocketPing();
 203     // Start WebSocket ping
 204     this.startWebSocketPing();
 205   }
 206
 207   public getAutomaticTransactionGeneratorRequireAuthorize(): boolean {
 208     return this.stationInfo.AutomaticTransactionGenerator.requireAuthorize ?? true;
 209   }
 210
 211   public startHeartbeat(): void {
 212     if (this.getHeartbeatInterval() && this.getHeartbeatInterval() > 0 && !this.heartbeatSetInterval) {
 213       // eslint-disable-next-line @typescript-eslint/no-misused-promises
 214       this.heartbeatSetInterval = setInterval(async (): Promise<void> => {
 215         await this.ocppRequestService.sendHeartbeat();
 216       }, this.getHeartbeatInterval());
 217       logger.info(this.logPrefix() + ' Heartbeat started every ' + Utils.milliSecondsToHHMMSS(this.getHeartbeatInterval()));
 218     } else if (this.heartbeatSetInterval) {
 219       logger.info(this.logPrefix() + ' Heartbeat already started every ' + Utils.milliSecondsToHHMMSS(this.getHeartbeatInterval()));
 220     } else {
 221       logger.error(`${this.logPrefix()} Heartbeat interval set to ${this.getHeartbeatInterval() ? Utils.milliSecondsToHHMMSS(this.getHeartbeatInterval()) : this.getHeartbeatInterval()}, not starting the heartbeat`);
 222     }
 223   }
 224
 225   public restartHeartbeat(): void {
 226     // Stop heartbeat
 227     this.stopHeartbeat();
 228     // Start heartbeat
 229     this.startHeartbeat();
 230   }
 231
 232   public startMeterValues(connectorId: number, interval: number): void {
 233     if (connectorId === 0) {
 234       logger.error(`${this.logPrefix()} Trying to start MeterValues on connector Id ${connectorId.toString()}`);
 235       return;
 236     }
 237     if (!this.getConnector(connectorId)) {
 238       logger.error(`${this.logPrefix()} Trying to start MeterValues on non existing connector Id ${connectorId.toString()}`);
 239       return;
 240     }
 241     if (!this.getConnector(connectorId)?.transactionStarted) {
 242       logger.error(`${this.logPrefix()} Trying to start MeterValues on connector Id ${connectorId} with no transaction started`);
 243       return;
 244     } else if (this.getConnector(connectorId)?.transactionStarted && !this.getConnector(connectorId)?.transactionId) {
 245       logger.error(`${this.logPrefix()} Trying to start MeterValues on connector Id ${connectorId} with no transaction id`);
 246       return;
 247     }
 248     if (interval > 0) {
 249       // eslint-disable-next-line @typescript-eslint/no-misused-promises
 250       this.getConnector(connectorId).transactionSetInterval = setInterval(async (): Promise<void> => {
 251         if (this.getEnableStatistics()) {
 252           const sendMeterValues = performance.timerify(this.ocppRequestService.sendMeterValues);
 253           this.performanceObserver.observe({
 254             entryTypes: ['function'],
 255           });
 256           await sendMeterValues(connectorId, this.getConnector(connectorId).transactionId, interval, this.ocppRequestService);
 257         } else {
 258           await this.ocppRequestService.sendMeterValues(connectorId, this.getConnector(connectorId).transactionId, interval, this.ocppRequestService);
 259         }
 260       }, interval);
 261     } else {
 262       logger.error(`${this.logPrefix()} Charging station ${StandardParametersKey.MeterValueSampleInterval} configuration set to ${interval ? Utils.milliSecondsToHHMMSS(interval) : interval}, not sending MeterValues`);
 263     }
 264   }
 265
 266   public start(): void {
 267     this.openWSConnection();
 268     // Monitor authorization file
 269     this.startAuthorizationFileMonitoring();
 270     // Monitor station template file
 271     this.startStationTemplateFileMonitoring();
 272     // Handle Socket incoming messages
 273     this.wsConnection.on('message', this.onMessage.bind(this));
 274     // Handle Socket error
 275     this.wsConnection.on('error', this.onError.bind(this));
 276     // Handle Socket close
 277     this.wsConnection.on('close', this.onClose.bind(this));
 278     // Handle Socket opening connection
 279     this.wsConnection.on('open', this.onOpen.bind(this));
 280     // Handle Socket ping
 281     this.wsConnection.on('ping', this.onPing.bind(this));
 282     // Handle Socket pong
 283     this.wsConnection.on('pong', this.onPong.bind(this));
 284   }
 285
 286   public async stop(reason: StopTransactionReason = StopTransactionReason.NONE): Promise<void> {
 287     // Stop message sequence
 288     await this.stopMessageSequence(reason);
 289     for (const connector in this.connectors) {
 290       if (Utils.convertToInt(connector) > 0) {
 291         await this.ocppRequestService.sendStatusNotification(Utils.convertToInt(connector), ChargePointStatus.UNAVAILABLE);
 292         this.getConnector(Utils.convertToInt(connector)).status = ChargePointStatus.UNAVAILABLE;
 293       }
 294     }
 295     if (this.isWebSocketOpen()) {
 296       this.wsConnection.close();
 297     }
 298     this.bootNotificationResponse = null;
 299     this.hasStopped = true;
 300   }
 301
 302   public getConfigurationKey(key: string | StandardParametersKey, caseInsensitive = false): ConfigurationKey | undefined {
 303     const configurationKey: ConfigurationKey | undefined = this.configuration.configurationKey.find((configElement) => {
 304       if (caseInsensitive) {
 305         return configElement.key.toLowerCase() === key.toLowerCase();
 306       }
 307       return configElement.key === key;
 308     });
 309     return configurationKey;
 310   }
 311
 312   public addConfigurationKey(key: string | StandardParametersKey, value: string, readonly = false, visible = true, reboot = false): void {
 313     const keyFound = this.getConfigurationKey(key);
 314     if (!keyFound) {
 315       this.configuration.configurationKey.push({
 316         key,
 317         readonly,
 318         value,
 319         visible,
 320         reboot,
 321       });
 322     } else {
 323       logger.error(`${this.logPrefix()} Trying to add an already existing configuration key: %j`, keyFound);
 324     }
 325   }
 326
 327   public setConfigurationKeyValue(key: string | StandardParametersKey, value: string): void {
 328     const keyFound = this.getConfigurationKey(key);
 329     if (keyFound) {
 330       const keyIndex = this.configuration.configurationKey.indexOf(keyFound);
 331       this.configuration.configurationKey[keyIndex].value = value;
 332     } else {
 333       logger.error(`${this.logPrefix()} Trying to set a value on a non existing configuration key: %j`, { key, value });
 334     }
 335   }
 336
 337   public setChargingProfile(connectorId: number, cp: ChargingProfile): boolean {
 338     if (!Utils.isEmptyArray(this.getConnector(connectorId).chargingProfiles)) {
 339       this.getConnector(connectorId).chargingProfiles?.forEach((chargingProfile: ChargingProfile, index: number) => {
 340         if (chargingProfile.chargingProfileId === cp.chargingProfileId
 341           || (chargingProfile.stackLevel === cp.stackLevel && chargingProfile.chargingProfilePurpose === cp.chargingProfilePurpose)) {
 342           this.getConnector(connectorId).chargingProfiles[index] = cp;
 343           return true;
 344         }
 345       });
 346     }
 347     this.getConnector(connectorId).chargingProfiles?.push(cp);
 348     return true;
 349   }
 350
 351   public resetTransactionOnConnector(connectorId: number): void {
 352     this.getConnector(connectorId).transactionStarted = false;
 353     delete this.getConnector(connectorId).transactionId;
 354     delete this.getConnector(connectorId).idTag;
 355     this.getConnector(connectorId).transactionEnergyActiveImportRegisterValue = 0;
 356     delete this.getConnector(connectorId).transactionBeginMeterValue;
 357     this.stopMeterValues(connectorId);
 358   }
 359
 360   public addToMessageQueue(message: string): void {
 361     let dups = false;
 362     // Handle dups in message queue
 363     for (const bufferedMessage of this.messageQueue) {
 364       // Message already in the queue
 365       if (message === bufferedMessage) {
 366         dups = true;
 367         break;
 368       }
 369     }
 370     if (!dups) {
 371       // Queue message
 372       this.messageQueue.push(message);
 373     }
 374   }
 375
 376   private flushMessageQueue() {
 377     if (!Utils.isEmptyArray(this.messageQueue)) {
 378       this.messageQueue.forEach((message, index) => {
 379         this.messageQueue.splice(index, 1);
 380         this.wsConnection.send(message);
 381       });
 382     }
 383   }
 384
 385   private getChargingStationId(stationTemplate: ChargingStationTemplate): string {
 386     // In case of multiple instances: add instance index to charging station id
 387     let instanceIndex = process.env.CF_INSTANCE_INDEX ? process.env.CF_INSTANCE_INDEX : 0;
 388     instanceIndex = instanceIndex > 0 ? instanceIndex : '';
 389     const idSuffix = stationTemplate.nameSuffix ? stationTemplate.nameSuffix : '';
 390     return stationTemplate.fixedName ? stationTemplate.baseName : stationTemplate.baseName + '-' + instanceIndex.toString() + ('000000000' + this.index.toString()).substr(('000000000' + this.index.toString()).length - 4) + idSuffix;
 391   }
 392
 393   private buildStationInfo(): ChargingStationInfo {
 394     let stationTemplateFromFile: ChargingStationTemplate;
 395     try {
 396       // Load template file
 397       const fileDescriptor = fs.openSync(this.stationTemplateFile, 'r');
 398       stationTemplateFromFile = JSON.parse(fs.readFileSync(fileDescriptor, 'utf8')) as ChargingStationTemplate;
 399       fs.closeSync(fileDescriptor);
 400     } catch (error) {
 401       FileUtils.handleFileException(this.logPrefix(), 'Template', this.stationTemplateFile, error);
 402     }
 403     const stationInfo: ChargingStationInfo = stationTemplateFromFile ?? {} as ChargingStationInfo;
 404     if (!Utils.isEmptyArray(stationTemplateFromFile.power)) {
 405       stationTemplateFromFile.power = stationTemplateFromFile.power as number[];
 406       const powerArrayRandomIndex = Math.floor(Math.random() * stationTemplateFromFile.power.length);
 407       stationInfo.maxPower = stationTemplateFromFile.powerUnit === PowerUnits.KILO_WATT
 408         ? stationTemplateFromFile.power[powerArrayRandomIndex] * 1000
 409         : stationTemplateFromFile.power[powerArrayRandomIndex];
 410     } else {
 411       stationTemplateFromFile.power = stationTemplateFromFile.power as number;
 412       stationInfo.maxPower = stationTemplateFromFile.powerUnit === PowerUnits.KILO_WATT
 413         ? stationTemplateFromFile.power * 1000
 414         : stationTemplateFromFile.power;
 415     }
 416     delete stationInfo.power;
 417     delete stationInfo.powerUnit;
 418     stationInfo.chargingStationId = this.getChargingStationId(stationTemplateFromFile);
 419     stationInfo.resetTime = stationTemplateFromFile.resetTime ? stationTemplateFromFile.resetTime * 1000 : Constants.CHARGING_STATION_DEFAULT_RESET_TIME;
 420     return stationInfo;
 421   }
 422
 423   private getOCPPVersion(): OCPPVersion {
 424     return this.stationInfo.ocppVersion ? this.stationInfo.ocppVersion : OCPPVersion.VERSION_16;
 425   }
 426
 427   private handleUnsupportedVersion(version: OCPPVersion) {
 428     const errMsg = `${this.logPrefix()} Unsupported protocol version '${version}' configured in template file ${this.stationTemplateFile}`;
 429     logger.error(errMsg);
 430     throw new Error(errMsg);
 431   }
 432
 433   private initialize(): void {
 434     this.stationInfo = this.buildStationInfo();
 435     this.bootNotificationRequest = {
 436       chargePointModel: this.stationInfo.chargePointModel,
 437       chargePointVendor: this.stationInfo.chargePointVendor,
 438       ...!Utils.isUndefined(this.stationInfo.chargeBoxSerialNumberPrefix) && { chargeBoxSerialNumber: this.stationInfo.chargeBoxSerialNumberPrefix },
 439       ...!Utils.isUndefined(this.stationInfo.firmwareVersion) && { firmwareVersion: this.stationInfo.firmwareVersion },
 440     };
 441     this.configuration = this.getTemplateChargingStationConfiguration();
 442     this.supervisionUrl = this.getSupervisionURL();
 443     this.wsConnectionUrl = this.supervisionUrl + '/' + this.stationInfo.chargingStationId;
 444     // Build connectors if needed
 445     const maxConnectors = this.getMaxNumberOfConnectors();
 446     if (maxConnectors <= 0) {
 447       logger.warn(`${this.logPrefix()} Charging station template ${this.stationTemplateFile} with ${maxConnectors} connectors`);
 448     }
 449     const templateMaxConnectors = this.getTemplateMaxNumberOfConnectors();
 450     if (templateMaxConnectors <= 0) {
 451       logger.warn(`${this.logPrefix()} Charging station template ${this.stationTemplateFile} with no connector configuration`);
 452     }
 453     if (!this.stationInfo.Connectors[0]) {
 454       logger.warn(`${this.logPrefix()} Charging station template ${this.stationTemplateFile} with no connector Id 0 configuration`);
 455     }
 456     // Sanity check
 457     if (maxConnectors > (this.stationInfo.Connectors[0] ? templateMaxConnectors - 1 : templateMaxConnectors) && !this.stationInfo.randomConnectors) {
 458       logger.warn(`${this.logPrefix()} Number of connectors exceeds the number of connector configurations in template ${this.stationTemplateFile}, forcing random connector configurations affectation`);
 459       this.stationInfo.randomConnectors = true;
 460     }
 461     const connectorsConfigHash = crypto.createHash('sha256').update(JSON.stringify(this.stationInfo.Connectors) + maxConnectors.toString()).digest('hex');
 462     // FIXME: Handle shrinking the number of connectors
 463     if (!this.connectors || (this.connectors && this.connectorsConfigurationHash !== connectorsConfigHash)) {
 464       this.connectorsConfigurationHash = connectorsConfigHash;
 465       // Add connector Id 0
 466       let lastConnector = '0';
 467       for (lastConnector in this.stationInfo.Connectors) {
 468         if (Utils.convertToInt(lastConnector) === 0 && this.getUseConnectorId0() && this.stationInfo.Connectors[lastConnector]) {
 469           this.connectors[lastConnector] = Utils.cloneObject<Connector>(this.stationInfo.Connectors[lastConnector]);
 470           this.connectors[lastConnector].availability = AvailabilityType.OPERATIVE;
 471           if (Utils.isUndefined(this.connectors[lastConnector]?.chargingProfiles)) {
 472             this.connectors[lastConnector].chargingProfiles = [];
 473           }
 474         }
 475       }
 476       // Generate all connectors
 477       if ((this.stationInfo.Connectors[0] ? templateMaxConnectors - 1 : templateMaxConnectors) > 0) {
 478         for (let index = 1; index <= maxConnectors; index++) {
 479           const randConnectorID = this.stationInfo.randomConnectors ? Utils.getRandomInt(Utils.convertToInt(lastConnector), 1) : index;
 480           this.connectors[index] = Utils.cloneObject<Connector>(this.stationInfo.Connectors[randConnectorID]);
 481           this.connectors[index].availability = AvailabilityType.OPERATIVE;
 482           if (Utils.isUndefined(this.connectors[lastConnector]?.chargingProfiles)) {
 483             this.connectors[index].chargingProfiles = [];
 484           }
 485         }
 486       }
 487     }
 488     // Avoid duplication of connectors related information
 489     delete this.stationInfo.Connectors;
 490     // Initialize transaction attributes on connectors
 491     for (const connector in this.connectors) {
 492       if (Utils.convertToInt(connector) > 0 && !this.getConnector(Utils.convertToInt(connector)).transactionStarted) {
 493         this.initTransactionAttributesOnConnector(Utils.convertToInt(connector));
 494       }
 495     }
 496     switch (this.getOCPPVersion()) {
 497       case OCPPVersion.VERSION_16:
 498         this.ocppIncomingRequestService = new OCPP16IncomingRequestService(this);
 499         this.ocppRequestService = new OCPP16RequestService(this, new OCPP16ResponseService(this));
 500         break;
 501       default:
 502         this.handleUnsupportedVersion(this.getOCPPVersion());
 503         break;
 504     }
 505     // OCPP parameters
 506     this.addConfigurationKey(StandardParametersKey.NumberOfConnectors, this.getNumberOfConnectors().toString(), true);
 507     if (!this.getConfigurationKey(StandardParametersKey.MeterValuesSampledData)) {
 508       this.addConfigurationKey(StandardParametersKey.MeterValuesSampledData, MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER);
 509     }
 510     if (!this.getConfigurationKey(StandardParametersKey.SupportedFeatureProfiles)) {
 511       this.addConfigurationKey(StandardParametersKey.SupportedFeatureProfiles, SupportedFeatureProfiles.Core);
 512     }
 513     if (!this.getConfigurationKey(StandardParametersKey.ConnectorPhaseRotation)) {
 514       const connectorPhaseRotation = [];
 515       for (const connector in this.connectors) {
 516         // AC/DC
 517         if (Utils.convertToInt(connector) === 0 && this.getNumberOfPhases() === 0) {
 518           connectorPhaseRotation.push(`${connector}.${ConnectorPhaseRotation.RST}`);
 519         } else if (Utils.convertToInt(connector) > 0 && this.getNumberOfPhases() === 0) {
 520           connectorPhaseRotation.push(`${connector}.${ConnectorPhaseRotation.NotApplicable}`);
 521         // AC
 522         } else if (Utils.convertToInt(connector) > 0 && this.getNumberOfPhases() === 1) {
 523           connectorPhaseRotation.push(`${connector}.${ConnectorPhaseRotation.NotApplicable}`);
 524         } else if (Utils.convertToInt(connector) > 0 && this.getNumberOfPhases() === 3) {
 525           connectorPhaseRotation.push(`${connector}.${ConnectorPhaseRotation.RST}`);
 526         }
 527       }
 528       this.addConfigurationKey(StandardParametersKey.ConnectorPhaseRotation, connectorPhaseRotation.toString());
 529     }
 530     this.stationInfo.powerDivider = this.getPowerDivider();
 531     if (this.getEnableStatistics()) {
 532       this.performanceStatistics = new PerformanceStatistics(this.stationInfo.chargingStationId);
 533       this.performanceObserver = new PerformanceObserver((list) => {
 534         const entry = list.getEntries()[0];
 535         this.performanceStatistics.logPerformance(entry, Constants.ENTITY_CHARGING_STATION);
 536         this.performanceObserver.disconnect();
 537       });
 538     }
 539   }
 540
 541   private async onOpen(): Promise<void> {
 542     logger.info(`${this.logPrefix()} Is connected to server through ${this.wsConnectionUrl}`);
 543     if (!this.isRegistered()) {
 544       // Send BootNotification
 545       let registrationRetryCount = 0;
 546       do {
 547         this.bootNotificationResponse = await this.ocppRequestService.sendBootNotification(this.bootNotificationRequest.chargePointModel,
 548           this.bootNotificationRequest.chargePointVendor, this.bootNotificationRequest.chargeBoxSerialNumber, this.bootNotificationRequest.firmwareVersion);
 549         if (!this.isRegistered()) {
 550           registrationRetryCount++;
 551           await Utils.sleep(this.bootNotificationResponse?.interval ? this.bootNotificationResponse.interval * 1000 : Constants.OCPP_DEFAULT_BOOT_NOTIFICATION_INTERVAL);
 552         }
 553       } while (!this.isRegistered() && (registrationRetryCount <= this.getRegistrationMaxRetries() || this.getRegistrationMaxRetries() === -1));
 554     }
 555     if (this.isRegistered()) {
 556       await this.startMessageSequence();
 557       this.hasStopped && (this.hasStopped = false);
 558       if (this.hasSocketRestarted && this.isWebSocketOpen()) {
 559         this.flushMessageQueue();
 560       }
 561     } else {
 562       logger.error(`${this.logPrefix()} Registration failure: max retries reached (${this.getRegistrationMaxRetries()}) or retry disabled (${this.getRegistrationMaxRetries()})`);
 563     }
 564     this.autoReconnectRetryCount = 0;
 565     this.hasSocketRestarted = false;
 566   }
 567
 568   private async onClose(closeEvent: any): Promise<void> {
 569     switch (closeEvent) {
 570       case WebSocketCloseEventStatusCode.CLOSE_NORMAL: // Normal close
 571       case WebSocketCloseEventStatusCode.CLOSE_NO_STATUS:
 572         logger.info(`${this.logPrefix()} Socket normally closed with status '${Utils.getWebSocketCloseEventStatusString(closeEvent)}'`);
 573         this.autoReconnectRetryCount = 0;
 574         break;
 575       default: // Abnormal close
 576         logger.error(`${this.logPrefix()} Socket abnormally closed with status '${Utils.getWebSocketCloseEventStatusString(closeEvent)}'`);
 577         await this.reconnect(closeEvent);
 578         break;
 579     }
 580   }
 581
 582   private async onMessage(messageEvent: MessageEvent): Promise<void> {
 583     let [messageType, messageId, commandName, commandPayload, errorDetails]: IncomingRequest = [0, '', '' as IncomingRequestCommand, {}, {}];
 584     let responseCallback: (payload: Record<string, unknown> | string, requestPayload: Record<string, unknown>) => void;
 585     let rejectCallback: (error: OCPPError) => void;
 586     let requestPayload: Record<string, unknown>;
 587     let errMsg: string;
 588     try {
 589       // Parse the message
 590       [messageType, messageId, commandName, commandPayload, errorDetails] = JSON.parse(messageEvent.toString()) as IncomingRequest;
 591       // Check the Type of message
 592       switch (messageType) {
 593         // Incoming Message
 594         case MessageType.CALL_MESSAGE:
 595           if (this.getEnableStatistics()) {
 596             this.performanceStatistics.addMessage(commandName, messageType);
 597           }
 598           // Process the call
 599           await this.ocppIncomingRequestService.handleRequest(messageId, commandName, commandPayload);
 600           break;
 601         // Outcome Message
 602         case MessageType.CALL_RESULT_MESSAGE:
 603           // Respond
 604           if (Utils.isIterable(this.requests[messageId])) {
 605             [responseCallback, , requestPayload] = this.requests[messageId];
 606           } else {
 607             throw new Error(`Response request for message id ${messageId} is not iterable`);
 608           }
 609           if (!responseCallback) {
 610             // Error
 611             throw new Error(`Response request for unknown message id ${messageId}`);
 612           }
 613           delete this.requests[messageId];
 614           responseCallback(commandName, requestPayload);
 615           break;
 616         // Error Message
 617         case MessageType.CALL_ERROR_MESSAGE:
 618           if (!this.requests[messageId]) {
 619             // Error
 620             throw new Error(`Error request for unknown message id ${messageId}`);
 621           }
 622           if (Utils.isIterable(this.requests[messageId])) {
 623             [, rejectCallback] = this.requests[messageId];
 624           } else {
 625             throw new Error(`Error request for message id ${messageId} is not iterable`);
 626           }
 627           delete this.requests[messageId];
 628           rejectCallback(new OCPPError(commandName, commandPayload.toString(), errorDetails));
 629           break;
 630         // Error
 631         default:
 632           errMsg = `${this.logPrefix()} Wrong message type ${messageType}`;
 633           logger.error(errMsg);
 634           throw new Error(errMsg);
 635       }
 636     } catch (error) {
 637       // Log
 638       logger.error('%s Incoming message %j processing error %j on request content type %j', this.logPrefix(), messageEvent, error, this.requests[messageId]);
 639       // Send error
 640       messageType !== MessageType.CALL_ERROR_MESSAGE && await this.ocppRequestService.sendError(messageId, error, commandName);
 641     }
 642   }
 643
 644   private onPing(): void {
 645     logger.debug(this.logPrefix() + ' Has received a WS ping (rfc6455) from the server');
 646   }
 647
 648   private onPong(): void {
 649     logger.debug(this.logPrefix() + ' Has received a WS pong (rfc6455) from the server');
 650   }
 651
 652   private async onError(errorEvent: any): Promise<void> {
 653     logger.error(this.logPrefix() + ' Socket error: %j', errorEvent);
 654     // switch (errorEvent.code) {
 655     //   case 'ECONNREFUSED':
 656     //     await this._reconnect(errorEvent);
 657     //     break;
 658     // }
 659   }
 660
 661   private getTemplateChargingStationConfiguration(): ChargingStationConfiguration {
 662     return this.stationInfo.Configuration ? this.stationInfo.Configuration : {} as ChargingStationConfiguration;
 663   }
 664
 665   private getAuthorizationFile(): string | undefined {
 666     return this.stationInfo.authorizationFile && path.join(path.resolve(__dirname, '../'), 'assets', path.basename(this.stationInfo.authorizationFile));
 667   }
 668
 669   private getAuthorizedTags(): string[] {
 670     let authorizedTags: string[] = [];
 671     const authorizationFile = this.getAuthorizationFile();
 672     if (authorizationFile) {
 673       try {
 674         // Load authorization file
 675         const fileDescriptor = fs.openSync(authorizationFile, 'r');
 676         authorizedTags = JSON.parse(fs.readFileSync(fileDescriptor, 'utf8')) as string[];
 677         fs.closeSync(fileDescriptor);
 678       } catch (error) {
 679         FileUtils.handleFileException(this.logPrefix(), 'Authorization', authorizationFile, error);
 680       }
 681     } else {
 682       logger.info(this.logPrefix() + ' No authorization file given in template file ' + this.stationTemplateFile);
 683     }
 684     return authorizedTags;
 685   }
 686
 687   private getUseConnectorId0(): boolean | undefined {
 688     return !Utils.isUndefined(this.stationInfo.useConnectorId0) ? this.stationInfo.useConnectorId0 : true;
 689   }
 690
 691   private getNumberOfRunningTransactions(): number {
 692     let trxCount = 0;
 693     for (const connector in this.connectors) {
 694       if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector)).transactionStarted) {
 695         trxCount++;
 696       }
 697     }
 698     return trxCount;
 699   }
 700
 701   // 0 for disabling
 702   private getConnectionTimeout(): number | undefined {
 703     if (!Utils.isUndefined(this.stationInfo.connectionTimeout)) {
 704       return this.stationInfo.connectionTimeout;
 705     }
 706     if (!Utils.isUndefined(Configuration.getConnectionTimeout())) {
 707       return Configuration.getConnectionTimeout();
 708     }
 709     return 30;
 710   }
 711
 712   // -1 for unlimited, 0 for disabling
 713   private getAutoReconnectMaxRetries(): number | undefined {
 714     if (!Utils.isUndefined(this.stationInfo.autoReconnectMaxRetries)) {
 715       return this.stationInfo.autoReconnectMaxRetries;
 716     }
 717     if (!Utils.isUndefined(Configuration.getAutoReconnectMaxRetries())) {
 718       return Configuration.getAutoReconnectMaxRetries();
 719     }
 720     return -1;
 721   }
 722
 723   // 0 for disabling
 724   private getRegistrationMaxRetries(): number | undefined {
 725     if (!Utils.isUndefined(this.stationInfo.registrationMaxRetries)) {
 726       return this.stationInfo.registrationMaxRetries;
 727     }
 728     return -1;
 729   }
 730
 731   private getPowerDivider(): number {
 732     let powerDivider = this.getNumberOfConnectors();
 733     if (this.stationInfo.powerSharedByConnectors) {
 734       powerDivider = this.getNumberOfRunningTransactions();
 735     }
 736     return powerDivider;
 737   }
 738
 739   private getTemplateMaxNumberOfConnectors(): number {
 740     return Object.keys(this.stationInfo.Connectors).length;
 741   }
 742
 743   private getMaxNumberOfConnectors(): number {
 744     let maxConnectors = 0;
 745     if (!Utils.isEmptyArray(this.stationInfo.numberOfConnectors)) {
 746       const numberOfConnectors = this.stationInfo.numberOfConnectors as number[];
 747       // Distribute evenly the number of connectors
 748       maxConnectors = numberOfConnectors[(this.index - 1) % numberOfConnectors.length];
 749     } else if (!Utils.isUndefined(this.stationInfo.numberOfConnectors)) {
 750       maxConnectors = this.stationInfo.numberOfConnectors as number;
 751     } else {
 752       maxConnectors = this.stationInfo.Connectors[0] ? this.getTemplateMaxNumberOfConnectors() - 1 : this.getTemplateMaxNumberOfConnectors();
 753     }
 754     return maxConnectors;
 755   }
 756
 757   private getNumberOfConnectors(): number {
 758     return this.connectors[0] ? Object.keys(this.connectors).length - 1 : Object.keys(this.connectors).length;
 759   }
 760
 761   private async startMessageSequence(): Promise<void> {
 762     // Start WebSocket ping
 763     this.startWebSocketPing();
 764     // Start heartbeat
 765     this.startHeartbeat();
 766     // Initialize connectors status
 767     for (const connector in this.connectors) {
 768       if (Utils.convertToInt(connector) === 0) {
 769         continue;
 770       } else if (!this.hasStopped && !this.getConnector(Utils.convertToInt(connector))?.status && this.getConnector(Utils.convertToInt(connector))?.bootStatus) {
 771         // Send status in template at startup
 772         await this.ocppRequestService.sendStatusNotification(Utils.convertToInt(connector), this.getConnector(Utils.convertToInt(connector)).bootStatus);
 773         this.getConnector(Utils.convertToInt(connector)).status = this.getConnector(Utils.convertToInt(connector)).bootStatus;
 774       } else if (this.hasStopped && this.getConnector(Utils.convertToInt(connector))?.bootStatus) {
 775         // Send status in template after reset
 776         await this.ocppRequestService.sendStatusNotification(Utils.convertToInt(connector), this.getConnector(Utils.convertToInt(connector)).bootStatus);
 777         this.getConnector(Utils.convertToInt(connector)).status = this.getConnector(Utils.convertToInt(connector)).bootStatus;
 778       } else if (!this.hasStopped && this.getConnector(Utils.convertToInt(connector))?.status) {
 779         // Send previous status at template reload
 780         await this.ocppRequestService.sendStatusNotification(Utils.convertToInt(connector), this.getConnector(Utils.convertToInt(connector)).status);
 781       } else {
 782         // Send default status
 783         await this.ocppRequestService.sendStatusNotification(Utils.convertToInt(connector), ChargePointStatus.AVAILABLE);
 784         this.getConnector(Utils.convertToInt(connector)).status = ChargePointStatus.AVAILABLE;
 785       }
 786     }
 787     // Start the ATG
 788     this.startAutomaticTransactionGenerator();
 789     if (this.getEnableStatistics()) {
 790       this.performanceStatistics.start();
 791     }
 792   }
 793
 794   private startAutomaticTransactionGenerator() {
 795     if (this.stationInfo.AutomaticTransactionGenerator.enable) {
 796       if (!this.automaticTransactionGeneration) {
 797         this.automaticTransactionGeneration = new AutomaticTransactionGenerator(this);
 798       }
 799       if (this.automaticTransactionGeneration.timeToStop) {
 800         // The ATG might sleep
 801         void this.automaticTransactionGeneration.start();
 802       }
 803     }
 804   }
 805
 806   private async stopMessageSequence(reason: StopTransactionReason = StopTransactionReason.NONE): Promise<void> {
 807     // Stop WebSocket ping
 808     this.stopWebSocketPing();
 809     // Stop heartbeat
 810     this.stopHeartbeat();
 811     // Stop the ATG
 812     if (this.stationInfo.AutomaticTransactionGenerator.enable &&
 813       this.automaticTransactionGeneration &&
 814       !this.automaticTransactionGeneration.timeToStop) {
 815       await this.automaticTransactionGeneration.stop(reason);
 816     } else {
 817       for (const connector in this.connectors) {
 818         if (Utils.convertToInt(connector) > 0 && this.getConnector(Utils.convertToInt(connector)).transactionStarted) {
 819           const transactionId = this.getConnector(Utils.convertToInt(connector)).transactionId;
 820           await this.ocppRequestService.sendStopTransaction(transactionId, this.getEnergyActiveImportRegisterByTransactionId(transactionId),
 821             this.getTransactionIdTag(transactionId), reason);
 822         }
 823       }
 824     }
 825   }
 826
 827   private startWebSocketPing(): void {
 828     const webSocketPingInterval: number = this.getConfigurationKey(StandardParametersKey.WebSocketPingInterval)
 829       ? Utils.convertToInt(this.getConfigurationKey(StandardParametersKey.WebSocketPingInterval).value)
 830       : 0;
 831     if (webSocketPingInterval > 0 && !this.webSocketPingSetInterval) {
 832       this.webSocketPingSetInterval = setInterval(() => {
 833         if (this.isWebSocketOpen()) {
 834           this.wsConnection.ping((): void => { });
 835         }
 836       }, webSocketPingInterval * 1000);
 837       logger.info(this.logPrefix() + ' WebSocket ping started every ' + Utils.secondsToHHMMSS(webSocketPingInterval));
 838     } else if (this.webSocketPingSetInterval) {
 839       logger.info(this.logPrefix() + ' WebSocket ping every ' + Utils.secondsToHHMMSS(webSocketPingInterval) + ' already started');
 840     } else {
 841       logger.error(`${this.logPrefix()} WebSocket ping interval set to ${webSocketPingInterval ? Utils.secondsToHHMMSS(webSocketPingInterval) : webSocketPingInterval}, not starting the WebSocket ping`);
 842     }
 843   }
 844
 845   private stopWebSocketPing(): void {
 846     if (this.webSocketPingSetInterval) {
 847       clearInterval(this.webSocketPingSetInterval);
 848     }
 849   }
 850
 851   private getSupervisionURL(): string {
 852     const supervisionUrls = Utils.cloneObject<string | string[]>(this.stationInfo.supervisionURL ? this.stationInfo.supervisionURL : Configuration.getSupervisionURLs());
 853     let indexUrl = 0;
 854     if (!Utils.isEmptyArray(supervisionUrls)) {
 855       if (Configuration.getDistributeStationsToTenantsEqually()) {
 856         indexUrl = this.index % supervisionUrls.length;
 857       } else {
 858         // Get a random url
 859         indexUrl = Math.floor(Math.random() * supervisionUrls.length);
 860       }
 861       return supervisionUrls[indexUrl];
 862     }
 863     return supervisionUrls as string;
 864   }
 865
 866   private getHeartbeatInterval(): number | undefined {
 867     const HeartbeatInterval = this.getConfigurationKey(StandardParametersKey.HeartbeatInterval);
 868     if (HeartbeatInterval) {
 869       return Utils.convertToInt(HeartbeatInterval.value) * 1000;
 870     }
 871     const HeartBeatInterval = this.getConfigurationKey(StandardParametersKey.HeartBeatInterval);
 872     if (HeartBeatInterval) {
 873       return Utils.convertToInt(HeartBeatInterval.value) * 1000;
 874     }
 875   }
 876
 877   private stopHeartbeat(): void {
 878     if (this.heartbeatSetInterval) {
 879       clearInterval(this.heartbeatSetInterval);
 880     }
 881   }
 882
 883   private openWSConnection(options?: WebSocket.ClientOptions, forceCloseOpened = false): void {
 884     options ?? {} as WebSocket.ClientOptions;
 885     options?.handshakeTimeout ?? this.getConnectionTimeout() * 1000;
 886     if (this.isWebSocketOpen() && forceCloseOpened) {
 887       this.wsConnection.close();
 888     }
 889     let protocol;
 890     switch (this.getOCPPVersion()) {
 891       case OCPPVersion.VERSION_16:
 892         protocol = 'ocpp' + OCPPVersion.VERSION_16;
 893         break;
 894       default:
 895         this.handleUnsupportedVersion(this.getOCPPVersion());
 896         break;
 897     }
 898     this.wsConnection = new WebSocket(this.wsConnectionUrl, protocol, options);
 899     logger.info(this.logPrefix() + ' Will communicate through URL ' + this.supervisionUrl);
 900   }
 901
 902   private stopMeterValues(connectorId: number) {
 903     if (this.getConnector(connectorId)?.transactionSetInterval) {
 904       clearInterval(this.getConnector(connectorId).transactionSetInterval);
 905     }
 906   }
 907
 908   private startAuthorizationFileMonitoring(): void {
 909     const authorizationFile = this.getAuthorizationFile();
 910     if (authorizationFile) {
 911       try {
 912         fs.watch(authorizationFile).on('change', () => {
 913           try {
 914             logger.debug(this.logPrefix() + ' Authorization file ' + authorizationFile + ' have changed, reload');
 915             // Initialize authorizedTags
 916             this.authorizedTags = this.getAuthorizedTags();
 917           } catch (error) {
 918             logger.error(this.logPrefix() + ' Authorization file monitoring error: %j', error);
 919           }
 920         });
 921       } catch (error) {
 922         FileUtils.handleFileException(this.logPrefix(), 'Authorization', authorizationFile, error);
 923       }
 924     } else {
 925       logger.info(this.logPrefix() + ' No authorization file given in template file ' + this.stationTemplateFile + '. Not monitoring changes');
 926     }
 927   }
 928
 929   private startStationTemplateFileMonitoring(): void {
 930     try {
 931       // eslint-disable-next-line @typescript-eslint/no-misused-promises
 932       fs.watch(this.stationTemplateFile).on('change', async (): Promise<void> => {
 933         try {
 934           logger.debug(this.logPrefix() + ' Template file ' + this.stationTemplateFile + ' have changed, reload');
 935           // Initialize
 936           this.initialize();
 937           // Stop the ATG
 938           if (!this.stationInfo.AutomaticTransactionGenerator.enable &&
 939           this.automaticTransactionGeneration) {
 940             await this.automaticTransactionGeneration.stop();
 941           }
 942           // Start the ATG
 943           this.startAutomaticTransactionGenerator();
 944           // FIXME?: restart heartbeat and WebSocket ping when their interval values have changed
 945         } catch (error) {
 946           logger.error(this.logPrefix() + ' Charging station template file monitoring error: %j', error);
 947         }
 948       });
 949     } catch (error) {
 950       FileUtils.handleFileException(this.logPrefix(), 'Template', this.stationTemplateFile, error);
 951     }
 952   }
 953
 954   private getReconnectExponentialDelay(): boolean | undefined {
 955     return !Utils.isUndefined(this.stationInfo.reconnectExponentialDelay) ? this.stationInfo.reconnectExponentialDelay : false;
 956   }
 957
 958   private async reconnect(error: any): Promise<void> {
 959     // Stop heartbeat
 960     this.stopHeartbeat();
 961     // Stop the ATG if needed
 962     if (this.stationInfo.AutomaticTransactionGenerator.enable &&
 963       this.stationInfo.AutomaticTransactionGenerator.stopOnConnectionFailure &&
 964       this.automaticTransactionGeneration &&
 965       !this.automaticTransactionGeneration.timeToStop) {
 966       await this.automaticTransactionGeneration.stop();
 967     }
 968     if (this.autoReconnectRetryCount < this.getAutoReconnectMaxRetries() || this.getAutoReconnectMaxRetries() === -1) {
 969       this.autoReconnectRetryCount++;
 970       const reconnectDelay = (this.getReconnectExponentialDelay() ? Utils.exponentialDelay(this.autoReconnectRetryCount) : this.getConnectionTimeout() * 1000);
 971       logger.error(`${this.logPrefix()} Socket: connection retry in ${Utils.roundTo(reconnectDelay, 2)}ms, timeout ${reconnectDelay - 100}ms`);
 972       await Utils.sleep(reconnectDelay);
 973       logger.error(this.logPrefix() + ' Socket: reconnecting try #' + this.autoReconnectRetryCount.toString());
 974       this.openWSConnection({ handshakeTimeout: reconnectDelay - 100 });
 975       this.hasSocketRestarted = true;
 976     } else if (this.getAutoReconnectMaxRetries() !== -1) {
 977       logger.error(`${this.logPrefix()} Socket reconnect failure: max retries reached (${this.autoReconnectRetryCount}) or retry disabled (${this.getAutoReconnectMaxRetries()})`);
 978     }
 979   }
 980
 981   private initTransactionAttributesOnConnector(connectorId: number): void {
 982     this.getConnector(connectorId).transactionStarted = false;
 983     this.getConnector(connectorId).energyActiveImportRegisterValue = 0;
 984     this.getConnector(connectorId).transactionEnergyActiveImportRegisterValue = 0;
 985   }
 986 }
 987