git.delta.rocks / unique-network / refs/commits / 0bfb46901e51

1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// SPDX-License-Identifier: Apache-2.034import {stringToU8a} from '@polkadot/util';5import {encodeAddress, mnemonicGenerate} from '@polkadot/util-crypto';6import {UniqueHelper, MoonbeamHelper, ChainHelperBase, AcalaHelper, RelayHelper, WestmintHelper} from './unique';7import {ApiPromise, Keyring, WsProvider} from '@polkadot/api';8import * as defs from '../../interfaces/definitions';9import {IKeyringPair} from '@polkadot/types/types';10import {EventRecord} from '@polkadot/types/interfaces';11import {ICrossAccountId, IPovInfo, TSigner} from './types';12import {FrameSystemEventRecord} from '@polkadot/types/lookup';13import {VoidFn} from '@polkadot/api/types';14import {Pallets} from '..';15import {spawnSync} from 'child_process';1617export class SilentLogger {18  log(_msg: any, _level: any): void { }19  level = {20    ERROR: 'ERROR' as const,21    WARNING: 'WARNING' as const,22    INFO: 'INFO' as const,23  };24}2526export class SilentConsole {27  // TODO: Remove, this is temporary: Filter unneeded API output28  // (Jaco promised it will be removed in the next version)29  consoleErr: any;30  consoleLog: any;31  consoleWarn: any;3233  constructor() {34    this.consoleErr = console.error;35    this.consoleLog = console.log;36    this.consoleWarn = console.warn;37  }3839  enable() {40    const outFn = (printer: any) => (...args: any[]) => {41      for (const arg of args) {42        if (typeof arg !== 'string')43          continue;44        if (arg.includes('1000:: Normal connection closure') || arg.includes('Not decorating unknown runtime apis:') || arg.includes('RPC methods not decorated:') || arg === 'Normal connection closure')45          return;46      }47      printer(...args);48    };4950    console.error = outFn(this.consoleErr.bind(console));51    console.log = outFn(this.consoleLog.bind(console));52    console.warn = outFn(this.consoleWarn.bind(console));53  }5455  disable() {56    console.error = this.consoleErr;57    console.log = this.consoleLog;58    console.warn = this.consoleWarn;59  }60}6162export class DevUniqueHelper extends UniqueHelper {63  /**64   * Arrange methods for tests65   */66  arrange: ArrangeGroup;67  wait: WaitGroup;68  admin: AdminGroup;69  session: SessionGroup;70  testUtils: TestUtilGroup;7172  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {73    options.helperBase = options.helperBase ?? DevUniqueHelper;7475    super(logger, options);76    this.arrange = new ArrangeGroup(this);77    this.wait = new WaitGroup(this);78    this.admin = new AdminGroup(this);79    this.testUtils = new TestUtilGroup(this);80    this.session = new SessionGroup(this);81  }8283  async connect(wsEndpoint: string, _listeners?: any): Promise<void> {84    const wsProvider = new WsProvider(wsEndpoint);85    this.api = new ApiPromise({86      provider: wsProvider,87      signedExtensions: {88        ContractHelpers: {89          extrinsic: {},90          payload: {},91        },92        CheckMaintenance: {93          extrinsic: {},94          payload: {},95        },96        DisableIdentityCalls: {97          extrinsic: {},98          payload: {},99        },100        FakeTransactionFinalizer: {101          extrinsic: {},102          payload: {},103        },104      },105      rpc: {106        unique: defs.unique.rpc,107        appPromotion: defs.appPromotion.rpc,108        povinfo: defs.povinfo.rpc,109        eth: {110          feeHistory: {111            description: 'Dummy',112            params: [],113            type: 'u8',114          },115          maxPriorityFeePerGas: {116            description: 'Dummy',117            params: [],118            type: 'u8',119          },120        },121      },122    });123    await this.api.isReadyOrError;124    this.network = await UniqueHelper.detectNetwork(this.api);125    this.wsEndpoint = wsEndpoint;126  }127}128129export class DevRelayHelper extends RelayHelper {130  wait: WaitGroup;131132  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {133    options.helperBase = options.helperBase ?? DevRelayHelper;134135    super(logger, options);136    this.wait = new WaitGroup(this);137  }138}139140export class DevWestmintHelper extends WestmintHelper {141  wait: WaitGroup;142143  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {144    options.helperBase = options.helperBase ?? DevWestmintHelper;145146    super(logger, options);147    this.wait = new WaitGroup(this);148  }149}150151export class DevStatemineHelper extends DevWestmintHelper {}152153export class DevStatemintHelper extends DevWestmintHelper {}154155export class DevMoonbeamHelper extends MoonbeamHelper {156  account: MoonbeamAccountGroup;157  wait: WaitGroup;158159  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {160    options.helperBase = options.helperBase ?? DevMoonbeamHelper;161    options.notePreimagePallet = options.notePreimagePallet ?? 'preimage';162163    super(logger, options);164    this.account = new MoonbeamAccountGroup(this);165    this.wait = new WaitGroup(this);166  }167}168169export class DevMoonriverHelper extends DevMoonbeamHelper {170  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {171    options.notePreimagePallet = options.notePreimagePallet ?? 'preimage';172    super(logger, options);173  }174}175176export class DevAcalaHelper extends AcalaHelper {177  wait: WaitGroup;178179  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {180    options.helperBase = options.helperBase ?? DevAcalaHelper;181182    super(logger, options);183    this.wait = new WaitGroup(this);184  }185}186187export class DevKaruraHelper extends DevAcalaHelper {}188189export class ArrangeGroup {190  helper: DevUniqueHelper;191192  scheduledIdSlider = 0;193194  constructor(helper: DevUniqueHelper) {195    this.helper = helper;196  }197198  /**199   * Generates accounts with the specified UNQ token balance200   * @param balances balances for generated accounts. Each balance will be multiplied by the token nominal.201   * @param donor donor account for balances202   * @returns array of newly created accounts203   * @example const [acc1, acc2, acc3] = await createAccounts([0n, 10n, 20n], donor);204   */205  createAccounts = async (balances: bigint[], donor: IKeyringPair): Promise<IKeyringPair[]> => {206    let nonce = await this.helper.chain.getNonce(donor.address);207    const wait = new WaitGroup(this.helper);208    const ss58Format = this.helper.chain.getChainProperties().ss58Format;209    const tokenNominal = this.helper.balance.getOneTokenNominal();210    const transactions = [];211    const accounts: IKeyringPair[] = [];212    for (const balance of balances) {213      const recipient = this.helper.util.fromSeed(mnemonicGenerate(), ss58Format);214      accounts.push(recipient);215      if (balance !== 0n) {216        const tx = this.helper.constructApiCall('api.tx.balances.transfer', [{Id: recipient.address}, balance * tokenNominal]);217        transactions.push(this.helper.signTransaction(donor, tx, {nonce, era: 0}, 'account generation'));218        nonce++;219      }220    }221222    await Promise.all(transactions).catch(_e => {});223224    //#region TODO remove this region, when nonce problem will be solved225    const checkBalances = async () => {226      let isSuccess = true;227      for (let i = 0; i < balances.length; i++) {228        const balance = await this.helper.balance.getSubstrate(accounts[i].address);229        if (balance !== balances[i] * tokenNominal) {230          isSuccess = false;231          break;232        }233      }234      return isSuccess;235    };236237    let accountsCreated = false;238    const maxBlocksChecked = await this.helper.arrange.isDevNode() ? 50 : 5;239    // checkBalances retry up to 5-50 blocks240    for (let index = 0; index < maxBlocksChecked; index++) {241      accountsCreated = await checkBalances();242      if(accountsCreated) break;243      await wait.newBlocks(1);244    }245246    if (!accountsCreated) throw Error('Accounts generation failed');247    //#endregion248249    return accounts;250  };251252  // TODO combine this method and createAccounts into one253  createCrowd = async (accountsToCreate: number, withBalance: bigint, donor: IKeyringPair): Promise<IKeyringPair[]> => {254    const createAsManyAsCan = async () => {255      let transactions: any = [];256      const accounts: IKeyringPair[] = [];257      let nonce = await this.helper.chain.getNonce(donor.address);258      const tokenNominal = this.helper.balance.getOneTokenNominal();259      const ss58Format = this.helper.chain.getChainProperties().ss58Format;260      for (let i = 0; i < accountsToCreate; i++) {261        if (i === 500) { // if there are too many accounts to create262          await Promise.allSettled(transactions); // wait while first 500 (should be 100 for devnode) tx will be settled263          transactions = []; //264          nonce = await this.helper.chain.getNonce(donor.address); // update nonce265        }266        const recipient = this.helper.util.fromSeed(mnemonicGenerate(), ss58Format);267        accounts.push(recipient);268        if (withBalance !== 0n) {269          const tx = this.helper.constructApiCall('api.tx.balances.transfer', [{Id: recipient.address}, withBalance * tokenNominal]);270          transactions.push(this.helper.signTransaction(donor, tx, {nonce}, 'account generation'));271          nonce++;272        }273      }274275      const fullfilledAccounts = [];276      await Promise.allSettled(transactions);277      for (const account of accounts) {278        const accountBalance = await this.helper.balance.getSubstrate(account.address);279        if (accountBalance === withBalance * tokenNominal) {280          fullfilledAccounts.push(account);281        }282      }283      return fullfilledAccounts;284    };285286287    const crowd: IKeyringPair[] = [];288    // do up to 5 retries289    for (let index = 0; index < 5 && accountsToCreate !== 0; index++) {290      const asManyAsCan = await createAsManyAsCan();291      crowd.push(...asManyAsCan);292      accountsToCreate -= asManyAsCan.length;293    }294295    if (accountsToCreate !== 0) throw Error(`Crowd generation failed: ${accountsToCreate} accounts left`);296297    return crowd;298  };299300  isDevNode = async () => {301    let blockNumber = (await this.helper.callRpc('api.query.system.number')).toJSON();302    if (blockNumber == 0) {303      await this.helper.wait.newBlocks(1);304      blockNumber = (await this.helper.callRpc('api.query.system.number')).toJSON();305    }306    const block2 = await this.helper.callRpc('api.rpc.chain.getBlock', [await this.helper.callRpc('api.rpc.chain.getBlockHash', [blockNumber])]);307    const block1 = await this.helper.callRpc('api.rpc.chain.getBlock', [await this.helper.callRpc('api.rpc.chain.getBlockHash', [blockNumber - 1])]);308    const findCreationDate = (block: any) => {309      const humanBlock = block.toHuman();310      let date;311      humanBlock.block.extrinsics.forEach((ext: any) => {312        if(ext.method.section === 'timestamp') {313          date = Number(ext.method.args.now.replaceAll(',', ''));314        }315      });316      return date;317    };318    const block1date = await findCreationDate(block1);319    const block2date = await findCreationDate(block2);320    if(block2date! - block1date! < 9000) return true;321  };322323  async calculcateFee(payer: ICrossAccountId, promise: () => Promise<any>): Promise<bigint> {324    const address = payer.Substrate ? payer.Substrate : this.helper.address.ethToSubstrate(payer.Ethereum!);325    let balance = await this.helper.balance.getSubstrate(address);326327    await promise();328329    balance -= await this.helper.balance.getSubstrate(address);330331    return balance;332  }333334  async calculatePoVInfo(txs: any[]): Promise<IPovInfo> {335    const rawPovInfo = await this.helper.callRpc('api.rpc.povinfo.estimateExtrinsicPoV', [txs]);336337    const kvJson: {[key: string]: string} = {};338339    for (const kv of rawPovInfo.keyValues) {340      kvJson[kv.key.toHex()] = kv.value.toHex();341    }342343    const kvStr = JSON.stringify(kvJson);344345    const chainql = spawnSync(346      'chainql',347      [348        `--tla-code=data=${kvStr}`,349        '-e', `function(data) cql.dump(cql.chain("${this.helper.getEndpoint()}").latest._meta, data, {omit_empty:true})`,350      ],351    );352353    if (!chainql.stdout) {354      throw Error('unable to get an output from the `chainql`');355    }356357    return {358      proofSize: rawPovInfo.proofSize.toNumber(),359      compactProofSize: rawPovInfo.compactProofSize.toNumber(),360      compressedProofSize: rawPovInfo.compressedProofSize.toNumber(),361      results: rawPovInfo.results,362      kv: JSON.parse(chainql.stdout.toString()),363    };364  }365366  calculatePalletAddress(palletId: any) {367    const address = stringToU8a(('modl' + palletId).padEnd(32, '\0'));368    return encodeAddress(address, this.helper.chain.getChainProperties().ss58Format);369  }370371  makeScheduledIds(num: number): string[] {372    function makeId(slider: number) {373      const scheduledIdSize = 64;374      const hexId = slider.toString(16);375      const prefixSize = scheduledIdSize - hexId.length;376377      const scheduledId = '0x' + '0'.repeat(prefixSize) + hexId;378379      return scheduledId;380    }381382    const ids = [];383    for (let i = 0; i < num; i++) {384      ids.push(makeId(this.scheduledIdSlider));385      this.scheduledIdSlider += 1;386    }387388    return ids;389  }390391  makeScheduledId(): string {392    return (this.makeScheduledIds(1))[0];393  }394395  async captureEvents(eventSection: string, eventMethod: string): Promise<EventCapture> {396    const capture = new EventCapture(this.helper, eventSection, eventMethod);397    await capture.startCapture();398399    return capture;400  }401}402403class MoonbeamAccountGroup {404  helper: MoonbeamHelper;405406  keyring: Keyring;407  _alithAccount: IKeyringPair;408  _baltatharAccount: IKeyringPair;409  _dorothyAccount: IKeyringPair;410411  constructor(helper: MoonbeamHelper) {412    this.helper = helper;413414    this.keyring = new Keyring({type: 'ethereum'});415    const alithPrivateKey = '0x5fb92d6e98884f76de468fa3f6278f8807c48bebc13595d45af5bdc4da702133';416    const baltatharPrivateKey = '0x8075991ce870b93a8870eca0c0f91913d12f47948ca0fd25b49c6fa7cdbeee8b';417    const dorothyPrivateKey = '0x39539ab1876910bbf3a223d84a29e28f1cb4e2e456503e7e91ed39b2e7223d68';418419    this._alithAccount = this.keyring.addFromUri(alithPrivateKey, undefined, 'ethereum');420    this._baltatharAccount = this.keyring.addFromUri(baltatharPrivateKey, undefined, 'ethereum');421    this._dorothyAccount = this.keyring.addFromUri(dorothyPrivateKey, undefined, 'ethereum');422  }423424  alithAccount() {425    return this._alithAccount;426  }427428  baltatharAccount() {429    return this._baltatharAccount;430  }431432  dorothyAccount() {433    return this._dorothyAccount;434  }435436  create() {437    return this.keyring.addFromUri(mnemonicGenerate());438  }439}440441class WaitGroup {442  helper: ChainHelperBase;443444  constructor(helper: ChainHelperBase) {445    this.helper = helper;446  }447448  sleep(milliseconds: number) {449    return new Promise((resolve) => setTimeout(resolve, milliseconds));450  }451452  private async waitWithTimeout(promise: Promise<any>, timeout: number) {453    let isBlock = false;454    promise.then(() => isBlock = true).catch(() => isBlock = true);455    let totalTime = 0;456    const step = 100;457    while(!isBlock) {458      await this.sleep(step);459      totalTime += step;460      if(totalTime >= timeout) throw Error('Blocks production failed');461    }462    return promise;463  }464465  /**466   * Launch some async operation, or throw an error after some time. Note that it will still continue executing after the timeout.467   * @param promise async operation to race against the timeout468   * @param timeoutMS time after which to time out469   * @param timeoutError error message to throw470   * @returns promise of the same type the operation had471   */472  withTimeout<T>(473    promise: Promise<T>,474    timeoutMS = 30000,475    timeoutError = 'The operation has timed out!',476  ): Promise<T> {477    const timeout = new Promise<never>((_, reject) => {478      setTimeout(() => {479        reject(new Error(timeoutError));480      }, timeoutMS);481    });482483    return Promise.race<T>([promise, timeout]).catch(e => {throw new Error(e);});484  }485486  /**487   * Wait for specified number of blocks488   * @param blocksCount number of blocks to wait489   * @returns490   */491  async newBlocks(blocksCount = 1, timeout?: number): Promise<void> {492    timeout = timeout ?? blocksCount * 60_000;493    // eslint-disable-next-line no-async-promise-executor494    const promise = new Promise<void>(async (resolve) => {495      const unsubscribe = await this.helper.getApi().rpc.chain.subscribeNewHeads(() => {496        if (blocksCount > 0) {497          blocksCount--;498        } else {499          unsubscribe();500          resolve();501        }502      });503    });504    await this.waitWithTimeout(promise, timeout);505    return promise;506  }507508  /**509   * Wait for the specified number of sessions to pass.510   * Only applicable if the Session pallet is turned on.511   * @param sessionCount number of sessions to wait512   * @param blockTimeout time in ms until panicking that the chain has stopped producing blocks513   * @returns514   */515  async newSessions(sessionCount = 1, blockTimeout = 60000): Promise<void> {516    console.log(`Waiting for ${sessionCount} new session${sessionCount > 1 ? 's' : ''}.`517      + ' This might take a while -- check SessionPeriod in pallet_session::Config for session time.');518519    const expectedSessionIndex = await (this.helper as DevUniqueHelper).session.getIndex() + sessionCount;520    let currentSessionIndex = -1;521522    while (currentSessionIndex < expectedSessionIndex) {523      // eslint-disable-next-line no-async-promise-executor524      currentSessionIndex = await this.withTimeout(new Promise(async (resolve) => {525        await this.newBlocks(1);526        const res = await (this.helper as DevUniqueHelper).session.getIndex();527        resolve(res);528      }), blockTimeout, 'The chain has stopped producing blocks!');529    }530  }531532  async forParachainBlockNumber(blockNumber: bigint | number, timeout?: number) {533    timeout = timeout ?? 30 * 60 * 1000;534    // eslint-disable-next-line no-async-promise-executor535    const promise = new Promise<void>(async (resolve) => {536      const unsubscribe = await this.helper.getApi().rpc.chain.subscribeNewHeads((data: any) => {537        if (data.number.toNumber() >= blockNumber) {538          unsubscribe();539          resolve();540        }541      });542    });543    await this.waitWithTimeout(promise, timeout);544    return promise;545  }546547  async forRelayBlockNumber(blockNumber: bigint | number, timeout?: number) {548    timeout = timeout ?? 30 * 60 * 1000;549    // eslint-disable-next-line no-async-promise-executor550    const promise = new Promise<void>(async (resolve) => {551      const unsubscribe = await this.helper.getApi().query.parachainSystem.validationData((data: any) => {552        if (data.value.relayParentNumber.toNumber() >= blockNumber) {553          // @ts-ignore554          unsubscribe();555          resolve();556        }557      });558    });559    await this.waitWithTimeout(promise, timeout);560    return promise;561  }562563  noScheduledTasks() {564    const api = this.helper.getApi();565566    // eslint-disable-next-line no-async-promise-executor567    const promise = new Promise<void>(async resolve => {568      const unsubscribe = await api.rpc.chain.subscribeNewHeads(async () => {569        const areThereScheduledTasks = await api.query.scheduler.lookup.entries();570571        if(areThereScheduledTasks.length == 0) {572          unsubscribe();573          resolve();574        }575      });576    });577578    return promise;579  }580581  event(maxBlocksToWait: number, eventSection: string, eventMethod: string) {582    // eslint-disable-next-line no-async-promise-executor583    const promise = new Promise<EventRecord | null>(async (resolve) => {584      const unsubscribe = await this.helper.getApi().rpc.chain.subscribeNewHeads(async header => {585        const blockNumber = header.number.toHuman();586        const blockHash = header.hash;587        const eventIdStr = `${eventSection}.${eventMethod}`;588        const waitLimitStr = `wait blocks remaining: ${maxBlocksToWait}`;589590        this.helper.logger.log(`[Block #${blockNumber}] Waiting for event \`${eventIdStr}\` (${waitLimitStr})`);591592        const apiAt = await this.helper.getApi().at(blockHash);593        const eventRecords = (await apiAt.query.system.events()) as any;594595        const neededEvent = eventRecords.toArray().find((r: FrameSystemEventRecord) => {596          return r.event.section == eventSection && r.event.method == eventMethod;597        });598599        if (neededEvent) {600          unsubscribe();601          resolve(neededEvent);602        } else if (maxBlocksToWait > 0) {603          maxBlocksToWait--;604        } else {605          this.helper.logger.log(`Event \`${eventIdStr}\` is NOT found`);606          unsubscribe();607          resolve(null);608        }609      });610    });611    return promise;612  }613}614615class SessionGroup {616  helper: ChainHelperBase;617618  constructor(helper: ChainHelperBase) {619    this.helper = helper;620  }621622  //todo:collator documentation623  async getIndex(): Promise<number> {624    return (await this.helper.callRpc('api.query.session.currentIndex')).toNumber();625  }626627  newSessions(sessionCount = 1, blockTimeout = 24000): Promise<void> {628    return (this.helper as DevUniqueHelper).wait.newSessions(sessionCount, blockTimeout);629  }630631  setOwnKeys(signer: TSigner, key: string) {632    return this.helper.executeExtrinsic(633      signer,634      'api.tx.session.setKeys',635      [key, '0x0'],636      true,637    );638  }639640  setOwnKeysFromAddress(signer: TSigner) {641    return this.setOwnKeys(signer, '0x' + Buffer.from(signer.addressRaw).toString('hex'));642  }643}644645class TestUtilGroup {646  helper: DevUniqueHelper;647648  constructor(helper: DevUniqueHelper) {649    this.helper = helper;650  }651652  async enable() {653    if (this.helper.fetchMissingPalletNames([Pallets.TestUtils]).length != 0) {654      return;655    }656657    const signer = this.helper.util.fromSeed('//Alice');658    await this.helper.getSudo<DevUniqueHelper>().executeExtrinsic(signer, 'api.tx.testUtils.enable', [], true);659  }660661  async setTestValue(signer: TSigner, testVal: number) {662    await this.helper.executeExtrinsic(signer, 'api.tx.testUtils.setTestValue', [testVal], true);663  }664665  async incTestValue(signer: TSigner) {666    await this.helper.executeExtrinsic(signer, 'api.tx.testUtils.incTestValue', [], true);667  }668669  async setTestValueAndRollback(signer: TSigner, testVal: number) {670    await this.helper.executeExtrinsic(signer, 'api.tx.testUtils.setTestValueAndRollback', [testVal], true);671  }672673  async testValue(blockIdx?: number) {674    const api = blockIdx675      ? await this.helper.getApi().at(await this.helper.callRpc('api.rpc.chain.getBlockHash', [blockIdx]))676      : this.helper.getApi();677678    return (await api.query.testUtils.testValue()).toJSON();679  }680681  async justTakeFee(signer: TSigner) {682    await this.helper.executeExtrinsic(signer, 'api.tx.testUtils.justTakeFee', [], true);683  }684685  async selfCancelingInc(signer: TSigner, scheduledId: string, maxTestVal: number) {686    await this.helper.executeExtrinsic(signer, 'api.tx.testUtils.selfCancelingInc', [scheduledId, maxTestVal], true);687  }688}689690class EventCapture {691  helper: DevUniqueHelper;692  eventSection: string;693  eventMethod: string;694  events: EventRecord[] = [];695  unsubscribe: VoidFn | null = null;696697  constructor(698    helper: DevUniqueHelper,699    eventSection: string,700    eventMethod: string,701  ) {702    this.helper = helper;703    this.eventSection = eventSection;704    this.eventMethod = eventMethod;705  }706707  async startCapture() {708    this.stopCapture();709    this.unsubscribe = (await this.helper.getApi().query.system.events((eventRecords: FrameSystemEventRecord[]) => {710      const newEvents = eventRecords.filter(r => {711        return r.event.section == this.eventSection && r.event.method == this.eventMethod;712      });713714      this.events.push(...newEvents);715    })) as any;716  }717718  stopCapture() {719    if (this.unsubscribe !== null) {720      this.unsubscribe();721    }722  }723724  extractCapturedEvents() {725    return this.events;726  }727}728729class AdminGroup {730  helper: UniqueHelper;731732  constructor(helper: UniqueHelper) {733    this.helper = helper;734  }735736  async payoutStakers(signer: IKeyringPair, stakersToPayout: number) {737    const payoutResult = await this.helper.executeExtrinsic(signer, 'api.tx.appPromotion.payoutStakers', [stakersToPayout], true);738    return payoutResult.result.events.filter(e => e.event.method === 'StakingRecalculation').map(e => {739      return {740        staker: e.event.data[0].toString(),741        stake: e.event.data[1].toBigInt(),742        payout: e.event.data[2].toBigInt(),743      };744    });745  }746}