git.delta.rocks / unique-network / refs/commits / e4eea6c1f0ba

--- /dev/null
+++ b/js-packages/scripts/authorizeEnactUpgrade.ts
@@ -0,0 +1,19 @@
+import {readFile} from 'fs/promises';
+import {u8aToHex} from '@polkadot/util';
+import {usingPlaygrounds} from '@unique/test-utils/util.js';
+import {blake2AsHex} from '@polkadot/util-crypto';
+
+
+const codePath = process.argv[2];
+if(!codePath) throw new Error('missing code path argument');
+
+const code = await readFile(codePath);
+
+await usingPlaygrounds(async (helper, privateKey) => {
+  const alice = await privateKey('//Alice');
+  const hex = blake2AsHex(code);
+  await helper.getSudo().executeExtrinsic(alice, 'api.tx.parachainSystem.authorizeUpgrade', [hex, true]);
+  await helper.getSudo().executeExtrinsicUncheckedWeight(alice, 'api.tx.parachainSystem.enactAuthorizedUpgrade', [u8aToHex(code)]);
+});
+// We miss disconnect/unref somewhere.
+process.exit(0);

--- /dev/null
+++ b/js-packages/scripts/createHrmp.ts
@@ -0,0 +1,37 @@
+import {usingPlaygrounds} from '@unique/test-utils/util.js';
+import config from '../tests/config.js';
+
+const profile = process.argv[2];
+if(!profile) throw new Error('missing profile/relay argument');
+
+await usingPlaygrounds(async (helper, privateKey) => {
+  const bidirOpen = async (a: number, b: number) => {
+    console.log(`Opening ${a} <=> ${b}`);
+    await helper.getSudo().executeExtrinsic(alice, 'api.tx.hrmp.forceOpenHrmpChannel', [a, b, 8, 512]);
+    await helper.getSudo().executeExtrinsic(alice, 'api.tx.hrmp.forceOpenHrmpChannel', [b, a, 8, 512]);
+  };
+  const alice = await privateKey('//Alice');
+  switch (profile) {
+    case 'opal':
+      await bidirOpen(1001, 1002);
+      break;
+    case 'quartz':
+      await bidirOpen(1001, 1002);
+      await bidirOpen(1001, 1003);
+      await bidirOpen(1001, 1004);
+      await bidirOpen(1001, 1005);
+      break;
+    case 'unique':
+      await bidirOpen(1001, 1002);
+      await bidirOpen(1001, 1003);
+      await bidirOpen(1001, 1004);
+      await bidirOpen(1001, 1005);
+      await bidirOpen(1001, 1006);
+      await bidirOpen(1001, 1007);
+      break;
+    default:
+      throw new Error(`unknown hrmp config profile: ${profile}`);
+  }
+}, config.relayUrl);
+// We miss disconnect/unref somewhere.
+process.exit(0);

--- /dev/null
+++ b/js-packages/scripts/identitySetter.ts
@@ -0,0 +1,229 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+//
+// Pulls identities and sub-identities from a chain and then makes a preimage to later force upload them into another.
+// Only changed or previously non-existent data are inserted.
+//
+// Usage: `yarn setIdentities [relay WS URL] [parachain WS URL] [user key]
+// Example: `yarn setIdentities wss://polkadot-rpc.dwellir.com ws://localhost:9944 escape pattern miracle train sudden cart adapt embark wedding alien lamp mesh`
+
+import {encodeAddress} from '@polkadot/keyring';
+import type {IKeyringPair} from '@polkadot/types/types';
+import {usingPlaygrounds, Pallets} from '@unique/test-utils/util.js';
+import {ChainHelperBase} from '@unique-nft/playgrounds/unique.js';
+
+const relayUrl = process.argv[2] ?? 'ws://localhost:9844';
+const paraUrl = process.argv[3] ?? 'ws://localhost:9944';
+const key = process.argv.length > 4 ? process.argv.slice(4).join(' ') : '//Alice';
+
+export function extractAccountId(key: any): string {
+  return (key as any).toHuman()[0];
+}
+
+export function extractIdentityInfo(value: any): object {
+  const heart = (value as any).unwrap();
+  const identity = heart.toJSON();
+  identity.judgements = heart.judgements.toHuman();
+  return identity;
+}
+
+export function extractIdentity(key: any, value: any): [string, any] {
+  return [extractAccountId(key), extractIdentityInfo(value)];
+}
+
+export async function getIdentities(helper: ChainHelperBase, noneCasePredicate?: (key: any, value: any) => void) {
+  const identities: [string, any][] = [];
+  for(const [key, v] of await helper.getApi().query.identity.identityOf.entries()) {
+    const value = v as any;
+    if(value.isNone) {
+      if(noneCasePredicate) noneCasePredicate(key, value);
+      continue;
+    }
+    identities.push(extractIdentity(key, value));
+  }
+  return identities;
+}
+
+// whether the existing chain data is more important than the coming
+function isCurrentChainDataPriority(helper: ChainHelperBase, currentChainId: number | undefined, relayChainId: number) {
+  if(!currentChainId) return false;
+  // information has come from local chain, and is automatically superior
+  if(currentChainId == helper.chain.getChainProperties().ss58Format) return true;
+  // the lower the id, the more important it is (Polkadot has ss58 prefix = 0, Kusama has ss58 prefix = 2)
+  return currentChainId < relayChainId;
+}
+
+// construct an object with all data necessary for insertion from storage query results
+export function constructSubInfo(identityAccount: string, subQuery: any, supers: any[], ss58?: number): [string, any] {
+  const deposit = subQuery.toJSON()[0];
+  const subIdentities = subQuery.toHuman()[1];
+  subIdentities.map((sub: string) => supers.find((sup: any) => sup[0] === sub));
+
+  return [
+    encodeAddress(identityAccount, ss58), [
+      deposit,
+      subIdentities.map((sub: string): [string, object] | null => {
+        const sup = supers.find((sup: any) => sup[0] === sub);
+        if(!sup) {
+          console.error(`Error: Could not find info on super for \nsub-identity account\t${sub} of \nsuper account \t\t${identityAccount}, skipping.`);
+          return null;
+        }
+        return [encodeAddress(sub, ss58), sup[1].toJSON()[1]];
+      }).filter((x: any) => x),
+    ],
+  ];
+}
+
+export async function getSubs(helper: ChainHelperBase) {
+  return (await helper.getApi().query.identity.subsOf.entries()).map(([key, value]) => [extractAccountId(key), value as any]);
+}
+
+export async function getSupers(helper: ChainHelperBase) {
+  return (await helper.getApi().query.identity.superOf.entries()).map(([key, value]) => [extractAccountId(key), value as any]);
+}
+
+async function uploadPreimage(helper: ChainHelperBase, preimageMaker: IKeyringPair, preimage: string) {
+  try {
+    await helper.executeExtrinsic(preimageMaker, 'api.tx.preimage.notePreimage', [preimage]);
+  } catch (e: any) {
+    if(e.message.includes('AlreadyNoted')) {
+      console.warn('Warning: The same preimage already exists on the chain. Nothing was uploaded.');
+    } else {
+      console.error(e);
+    }
+  }
+}
+
+// The utility for pulling identity and sub-identity data
+const forceInsertIdentities = async (): Promise<void> => {
+  let relaySS58Prefix = 0;
+  const identitiesOnRelay: any[] = [];
+  const subsOnRelay: any[] = [];
+  const identitiesToRemove: string[] = [];
+  await usingPlaygrounds(async helper => {
+    try {
+      relaySS58Prefix = helper.chain.getChainProperties().ss58Format;
+      // iterate over every identity
+      for(const [key, value] of await getIdentities(helper, (key, _value) => identitiesToRemove.push((key as any).toHuman()[0]))) {
+        // if any of the judgements resulted in a good confirmed outcome, keep this identity
+        let knownGood = false, reasonable = false;
+        for(const [_id, judgement] of value.judgements) {
+          if(judgement == 'KnownGood') knownGood = true;
+          if(judgement == 'Reasonable') reasonable = true;
+        }
+        if(!(reasonable || knownGood)) continue;
+        // replace the registrator id with the relay chain's ss58 format
+        value.judgements = [[helper.chain.getChainProperties().ss58Format, knownGood ? 'KnownGood' : 'Reasonable']];
+        identitiesOnRelay.push([key, value]);
+      }
+
+      const sublessIdentities = [...identitiesOnRelay];
+      const supersOfSubs = await getSupers(helper);
+
+      // iterate over every sub-identity
+      for(const [key, value] of await getSubs(helper)) {
+        // only get subs of the identities interesting to us
+        const identityIndex = sublessIdentities.findIndex((x: any) => x[0] == key);
+        if(identityIndex == -1) continue;
+        sublessIdentities.splice(identityIndex, 1);
+        subsOnRelay.push(constructSubInfo(key, value, supersOfSubs));
+      }
+
+      // mark the rest of sub-identities for deletion with empty arrays
+      /*for(const [account, _identity] of sublessIdentities) {
+        subsOnRelay.push([account, ['0', []]]);
+      }*/
+    } catch (error) {
+      console.error(error);
+      throw Error('Error during fetching identities');
+    }
+  }, relayUrl);
+
+  await usingPlaygrounds(async (helper, privateKey) => {
+    if(helper.fetchMissingPalletNames([Pallets.Identity]).length != 0) console.error('pallet-identity is not included in parachain.');
+    if(helper.fetchMissingPalletNames([Pallets.Preimage]).length != 0) console.error('pallet-preimage is not included in parachain.');
+
+    try {
+      const preimageMaker = await privateKey(key);
+      const ss58Format = helper.chain.getChainProperties().ss58Format;
+      const paraIdentities = await getIdentities(helper);
+      const identitiesToAdd: any[] = [];
+      const paraAccountsRegistrators: {[name: string]: number} = {};
+
+      // cross-reference every account for changes
+      for(const [key, value] of identitiesOnRelay) {
+        const encodedKey = encodeAddress(key, ss58Format);
+
+        // only update if the identity info does not exist or is changed
+        const identity = paraIdentities.find(i => i[0] === encodedKey);
+        if(identity) {
+          const registratorId = identity[1].judgements[0][0];
+          paraAccountsRegistrators[encodedKey] = registratorId;
+          if(isCurrentChainDataPriority(helper, registratorId, value.judgements[0][0])
+            || JSON.stringify(value.info) === JSON.stringify(identity[1].info)) {
+            continue;
+          }
+        }
+
+        identitiesToAdd.push([key, value]);
+        // exercise caution - in case we have an identity and the realy doesn't, it might mean one of two things:
+        // 1) it was deleted on the relay;
+        // 2) it is our own identity, we don't want to delete it.
+        // identitiesToRemove.push((key as any).toHuman()[0]);
+      }
+
+      if(identitiesToRemove.length != 0)
+        await uploadPreimage(
+          helper,
+          preimageMaker,
+          helper.constructApiCall('api.tx.identity.forceRemoveIdentities', [identitiesToRemove]).method.toHex(),
+        );
+      if(identitiesToAdd.length != 0)
+        await uploadPreimage(
+          helper,
+          preimageMaker,
+          helper.constructApiCall('api.tx.identity.forceInsertIdentities', [identitiesToAdd]).method.toHex(),
+        );
+
+      console.log(`Tried to push ${identitiesToAdd.length} identities`
+        + ` and found ${identitiesToRemove.length} identities for potential removal.`
+        + ` Currently there are ${(await helper.getApi().query.identity.identityOf.keys()).length} identities on the chain.`);
+
+      // fill sub-identities
+      const paraSubs = await getSubs(helper);
+      const supersOfSubs = await getSupers(helper);
+      const subsToUpdate: any[] = [];
+
+      for(const [key, value] of subsOnRelay) {
+        const encodedKey = encodeAddress(key, ss58Format);
+        const sub = paraSubs.find(i => i[0] === encodedKey);
+        if(sub) {
+          // only update if the sub-identity info does not exist or is changed
+          if(isCurrentChainDataPriority(helper, paraAccountsRegistrators[encodedKey], relaySS58Prefix)
+            || JSON.stringify(value) === JSON.stringify(constructSubInfo(sub[0], sub[1], supersOfSubs)[1])) {
+            continue;
+          }
+        } else if(value[1].length == 0)
+          continue;
+
+        subsToUpdate.push([key, value]);
+      }
+
+      if(subsToUpdate.length != 0)
+        await uploadPreimage(
+          helper,
+          preimageMaker,
+          helper.constructApiCall('api.tx.identity.forceSetSubs', [subsToUpdate]).method.toHex(),
+        );
+
+      console.log(`Also tried to push ${subsToUpdate.length} identities with their sub-identities.`
+        + ` Currently there are ${(await helper.getApi().query.identity.subsOf.keys()).length} identities with subs.`);
+    } catch (error) {
+      console.error(error);
+      throw Error('Error during setting identities');
+    }
+  }, paraUrl);
+};
+
+if(process.argv[1] === module.filename)
+  forceInsertIdentities().catch(() => process.exit(1));

--- /dev/null
+++ b/js-packages/scripts/relayIdentitiesChecker.ts
@@ -0,0 +1,114 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+//
+// Checks and reports the differences between identities and sub-identities on two chains.
+//
+// Usage: `yarn checkRelayIdentities [relay-1 WS URL] [relay-2 WS URL]`
+// Example: `yarn checkRelayIdentities wss://polkadot-rpc.dwellir.com wss://kusama-rpc.dwellir.com`
+
+import {encodeAddress} from '@polkadot/keyring';
+import {usingPlaygrounds} from '@unique/test-utils/util.js';
+import {getIdentities, getSubs, getSupers, constructSubInfo} from './identitySetter.js';
+
+const relay1Url = process.argv[2] ?? 'ws://localhost:9844';
+const relay2Url = process.argv[3] ?? 'ws://localhost:9844';
+
+async function pullIdentities(relayUrl: string): Promise<[any[], any[]]> {
+  const identities: any[] = [];
+  const subs: any[] = [];
+
+  await usingPlaygrounds(async helper => {
+    try {
+      // iterate over every identity
+      for(const [key, value] of await getIdentities(helper)) {
+        // if any of the judgements resulted in a good confirmed outcome, keep this identity
+        if(value.toHuman().judgements.filter((x: any) => x[1] == 'Reasonable' || x[1] == 'KnownGood').length == 0) continue;
+        identities.push([key, value]);
+      }
+
+      const supersOfSubs = await getSupers(helper);
+
+      // iterate over every sub-identity
+      for(const [key, value] of await getSubs(helper)) {
+        // only get subs of the identities interesting to us
+        if(identities.find((x: any) => x[0] == key) == -1) continue;
+        subs.push(constructSubInfo(key, value, supersOfSubs));
+      }
+    } catch (error) {
+      console.error(error);
+      throw Error(`Error during fetching identities on ${relayUrl}`);
+    }
+  }, relayUrl);
+
+  return [identities, subs];
+}
+
+// The utility for pulling identity and sub-identity data
+const checkRelayIdentities = async (): Promise<void> => {
+  const [identitiesOnRelay1, subIdentitiesOnRelay1] = await pullIdentities(relay1Url);
+  const [identitiesOnRelay2, subIdentitiesOnRelay2] = await pullIdentities(relay2Url);
+
+  console.log('identities counts:\t', identitiesOnRelay1.length, identitiesOnRelay2.length);
+  console.log('sub-identities counts:\t', subIdentitiesOnRelay1.length, subIdentitiesOnRelay2.length);
+  console.log();
+
+  try {
+    const matchingAddresses: string[] = [];
+    const inequalIdentities: {[name: string]: [any, any]} = {};
+
+    for(const [key1, value1] of identitiesOnRelay1) {
+      const address = encodeAddress(key1);
+      const identity2 = identitiesOnRelay2.find(([key2, _value2]) => address === encodeAddress(key2));
+      if(!identity2) continue;
+      matchingAddresses.push(address);
+
+      //const [[key2, value2]] = identitiesOnRelay2.splice(index2, 1);
+      const [_key2, value2] = identity2;
+      if(JSON.stringify(value1.info) === JSON.stringify(value2.info)) continue;
+      inequalIdentities[address] = [value1, value2];
+    }
+
+    /*for (const [v1, v2] of Object.values(inequalIdentities)) {
+      console.log(v1.toHuman().info);
+      console.log();
+      console.log(v2.toHuman().info);
+      await new Promise(resolve => setTimeout(resolve, 4000));
+    }*/
+
+    console.log(`Accounts with identities on both relays:\t${matchingAddresses.length}`);
+    console.log(`Sub-identities with conflicting information:\t${Object.entries(inequalIdentities).length}`);
+    console.log();
+
+    const inequalSubIdentities = [];
+    let matchesFound = 0;
+    for(const address of matchingAddresses) {
+      const sub1 = subIdentitiesOnRelay1.find(([key1, _value1]) => address === encodeAddress(key1));
+      if(!sub1) continue;
+      const sub2 = subIdentitiesOnRelay2.find(([key2, _value2]) => address === encodeAddress(key2));
+      if(!sub2) continue;
+
+      const [value1, value2] = [sub1[1], sub2[1]];
+      matchesFound++;
+
+      if(JSON.stringify(value1[1]) === JSON.stringify(value2[1])) {
+        continue;
+      }
+      inequalSubIdentities.push([value1, value2]);
+    }
+
+    /*for (const [v1, v2] of inequalSubIdentities) {
+      console.log(v1[1]);
+      console.log();
+      console.log(v2[1]);
+      await new Promise(resolve => setTimeout(resolve, 300));
+    }*/
+    console.log(`Accounts with sub-identities on both relays:\t${matchesFound}`);
+    console.log(`Of them, those with conflicting sub-identities:\t${inequalSubIdentities.length}`);
+  } catch (error) {
+    console.error(error);
+    throw Error('Error during comparison');
+  }
+};
+
+if(process.argv[1] === module.filename)
+  checkRelayIdentities().catch(() => process.exit(1));

--- /dev/null
+++ b/js-packages/scripts/setCode.ts
@@ -0,0 +1,15 @@
+import {readFile} from 'fs/promises';
+import {u8aToHex} from '@polkadot/util';
+import {usingPlaygrounds} from '@unique/test-utils/util.js';
+
+const codePath = process.argv[2];
+if(!codePath) throw new Error('missing code path argument');
+
+const code = await readFile(codePath);
+
+await usingPlaygrounds(async (helper, privateKey) => {
+  const alice = await privateKey('//Alice');
+  await helper.getSudo().executeExtrinsicUncheckedWeight(alice, 'api.tx.system.setCode', [u8aToHex(code)]);
+});
+// We miss disconnect/unref somewhere.
+process.exit(0);

--- /dev/null
+++ b/js-packages/test-utils/globalSetup.ts
@@ -0,0 +1,119 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+import {
+  usingPlaygrounds, Pallets, DONOR_FUNDING, MINIMUM_DONOR_FUND, LOCKING_PERIOD, UNLOCKING_PERIOD, makeNames,
+} from './util.js';
+import * as path from 'path';
+import {promises as fs} from 'fs';
+
+const {dirname} = makeNames(import.meta.url);
+
+// This function should be called before running test suites.
+const globalSetup = async (): Promise<void> => {
+  await usingPlaygrounds(async (helper, privateKey) => {
+    try {
+      // 1. Wait node producing blocks
+      await helper.wait.newBlocks(1, 600_000);
+
+      // 2. Create donors for test files
+      await fundFilenamesWithRetries(3)
+        .then((result) => {
+          if(!result) throw Error('Some problems with fundFilenamesWithRetries');
+        });
+
+      // 3. Configure App Promotion
+      const missingPallets = helper.fetchMissingPalletNames([Pallets.AppPromotion]);
+      if(missingPallets.length === 0) {
+        const superuser = await privateKey('//Alice');
+        const palletAddress = helper.arrange.calculatePalletAddress('appstake');
+        const palletAdmin = await privateKey('//PromotionAdmin');
+        const api = helper.getApi();
+        await helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})));
+        const nominal = helper.balance.getOneTokenNominal();
+        await helper.balance.transferToSubstrate(superuser, palletAdmin.address, 10000n * nominal);
+        await helper.balance.transferToSubstrate(superuser, palletAddress, 10000n * nominal);
+        await helper.executeExtrinsic(superuser, 'api.tx.sudo.sudo', [api.tx.configuration
+          .setAppPromotionConfigurationOverride({
+            recalculationInterval: LOCKING_PERIOD,
+            pendingInterval: UNLOCKING_PERIOD})], true);
+      }
+    } catch (error) {
+      console.error(error);
+      throw Error('Error during globalSetup');
+    }
+  });
+};
+
+async function getFiles(rootPath: string): Promise<string[]> {
+  const files = await fs.readdir(rootPath, {withFileTypes: true});
+  const filenames: string[] = [];
+  for(const entry of files) {
+    const res = path.resolve(rootPath, entry.name);
+    if(entry.isDirectory()) {
+      filenames.push(...await getFiles(res));
+    } else {
+      filenames.push(res);
+    }
+  }
+  return filenames;
+}
+
+const fundFilenames = async () => {
+  await usingPlaygrounds(async (helper, privateKey) => {
+    const oneToken = helper.balance.getOneTokenNominal();
+    const alice = await privateKey('//Alice');
+    const nonce = await helper.chain.getNonce(alice.address);
+    const filenames = await getFiles(path.resolve(dirname, '..'));
+
+    // batching is actually undesireable, it takes away the time while all the transactions actually succeed
+    const batchSize = 300;
+    let balanceGrantedCounter = 0;
+    for(let b = 0; b < filenames.length; b += batchSize) {
+      const tx: Promise<boolean>[] = [];
+      let batchBalanceGrantedCounter = 0;
+      for(let i = 0; batchBalanceGrantedCounter < batchSize && b + i < filenames.length; i++) {
+        const f = filenames[b + i];
+        if(!f.endsWith('.test.ts') && !f.endsWith('seqtest.ts') || f.includes('.outdated')) continue;
+        const account = await privateKey({filename: f, ignoreFundsPresence: true});
+        const aliceBalance = await helper.balance.getSubstrate(account.address);
+
+        if(aliceBalance < MINIMUM_DONOR_FUND * oneToken) {
+          tx.push(helper.executeExtrinsic(
+            alice,
+            'api.tx.balances.transferKeepAlive',
+            [account.address, DONOR_FUNDING * oneToken],
+            true,
+            {nonce: nonce + balanceGrantedCounter++},
+          ).then(() => true).catch(() => {console.error(`Transaction to ${path.basename(f)} registered as failed. Strange.`); return false;}));
+          batchBalanceGrantedCounter++;
+        }
+      }
+
+      if(tx.length > 0) {
+        console.log(`Granting funds to ${batchBalanceGrantedCounter} filename accounts.`);
+        const result = await Promise.all(tx);
+        if(result && result.lastIndexOf(false) > -1) throw new Error('The transactions actually probably succeeded, should check the balances.');
+      }
+    }
+
+    if(balanceGrantedCounter == 0) console.log('No account needs additional funding.');
+  });
+};
+
+const fundFilenamesWithRetries = (retriesLeft: number): Promise<boolean> => {
+  if(retriesLeft <= 0) return Promise.resolve(false);
+  return fundFilenames()
+    .then(() => Promise.resolve(true))
+    .catch(e => {
+      console.error(e);
+      console.error(`Some transactions might have failed. ${retriesLeft > 1 ? 'Retrying...' : 'Something is wrong.'}\n`);
+      return fundFilenamesWithRetries(--retriesLeft);
+    });
+};
+
+globalSetup().catch(e => {
+  console.error('Setup error');
+  console.error(e);
+  process.exit(1);
+});

--- /dev/null
+++ b/js-packages/test-utils/governance.ts
@@ -0,0 +1,531 @@
+import {blake2AsHex} from '@polkadot/util-crypto';
+import type {PalletDemocracyConviction} from '@polkadot/types/lookup';
+import type {IPhasicEvent, TSigner} from '@unique-nft/playgrounds/types.js';
+import {HelperGroup, UniqueHelper} from '@unique-nft/playgrounds/unique.js';
+
+export class CollectiveGroup extends HelperGroup<UniqueHelper> {
+  /**
+   * Pallet name to make an API call to. Examples: 'council', 'technicalCommittee'
+   */
+  private collective: string;
+
+  constructor(helper: UniqueHelper, collective: string) {
+    super(helper);
+    this.collective = collective;
+  }
+
+  /**
+   * Check the result of a proposal execution for the success of the underlying proposed extrinsic.
+   * @param events events of the proposal execution
+   * @returns proposal hash
+   */
+  private checkExecutedEvent(events: IPhasicEvent[]): string {
+    const executionEvents = events.filter(x =>
+      x.event.section === this.collective && (x.event.method === 'Executed' || x.event.method === 'MemberExecuted'));
+
+    if(executionEvents.length != 1) {
+      if(events.filter(x => x.event.section === this.collective && x.event.method === 'Disapproved').length > 0)
+        throw new Error(`Disapproved by ${this.collective}`);
+      else
+        throw new Error(`Expected one 'Executed' or 'MemberExecuted' event for ${this.collective}`);
+    }
+
+    const result = (executionEvents[0].event.data as any).result;
+
+    if(result.isErr) {
+      if(result.asErr.isModule) {
+        const error = result.asErr.asModule;
+        const metaError = this.helper.getApi()?.registry.findMetaError(error);
+        throw new Error(`Proposal execution failed with ${metaError.section}.${metaError.name}`);
+      } else {
+        throw new Error('Proposal execution failed with ' + result.asErr.toHuman());
+      }
+    }
+
+    return (executionEvents[0].event.data as any).proposalHash;
+  }
+
+  /**
+   * Returns an array of members' addresses.
+   */
+  async getMembers() {
+    return (await this.helper.callRpc(`api.query.${this.collective}.members`, [])).toHuman();
+  }
+
+  /**
+   * Returns the optional address of the prime member of the collective.
+   */
+  async getPrimeMember() {
+    return (await this.helper.callRpc(`api.query.${this.collective}.prime`, [])).toHuman();
+  }
+
+  /**
+   * Returns an array of proposal hashes that are currently active for this collective.
+   */
+  async getProposals() {
+    return (await this.helper.callRpc(`api.query.${this.collective}.proposals`, [])).toHuman();
+  }
+
+  /**
+   * Returns the call originally encoded under the specified hash.
+   * @param hash h256-encoded proposal
+   * @returns the optional call that the proposal hash stands for.
+   */
+  async getProposalCallOf(hash: string) {
+    return (await this.helper.callRpc(`api.query.${this.collective}.proposalOf`, [hash])).toHuman();
+  }
+
+  /**
+   * Returns the total number of proposals so far.
+   */
+  async getTotalProposalsCount() {
+    return (await this.helper.callRpc(`api.query.${this.collective}.proposalCount`, [])).toNumber();
+  }
+
+  /**
+   * Creates a new proposal up for voting. If the threshold is set to 1, the proposal will be executed immediately.
+   * @param signer keyring of the proposer
+   * @param proposal constructed call to be executed if the proposal is successful
+   * @param voteThreshold minimal number of votes for the proposal to be verified and executed
+   * @param lengthBound byte length of the encoded call
+   * @returns promise of extrinsic execution and its result
+   */
+  async propose(signer: TSigner, proposal: any, voteThreshold: number, lengthBound = 10000) {
+    return await this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.propose`, [voteThreshold, proposal, lengthBound]);
+  }
+
+  /**
+   * Casts a vote to either approve or reject a proposal.
+   * @param signer keyring of the voter
+   * @param proposalHash hash of the proposal to be voted for
+   * @param proposalIndex absolute index of the proposal used for absolutely nothing but throwing pointless errors
+   * @param approve aye or nay
+   * @returns promise of extrinsic execution and its result
+   */
+  vote(signer: TSigner, proposalHash: string, proposalIndex: number, approve: boolean) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.vote`, [proposalHash, proposalIndex, approve]);
+  }
+
+  /**
+   * Executes a call immediately as a member of the collective. Needed for the Member origin.
+   * @param signer keyring of the executor member
+   * @param proposal constructed call to be executed by the member
+   * @param lengthBound byte length of the encoded call
+   * @returns promise of extrinsic execution
+   */
+  async execute(signer: TSigner, proposal: any, lengthBound = 10000) {
+    const result = await this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.execute`, [proposal, lengthBound]);
+    this.checkExecutedEvent(result.result.events);
+    return result;
+  }
+
+  /**
+   * Attempt to close and execute a proposal. Note that there must already be enough votes to meet the threshold set when proposing.
+   * @param signer keyring of the executor. Can be absolutely anyone.
+   * @param proposalHash hash of the proposal to close
+   * @param proposalIndex index of the proposal generated on its creation
+   * @param weightBound weight of the proposed call. Can be obtained by calling `paymentInfo()` on the call.
+   * @param lengthBound byte length of the encoded call
+   * @returns promise of extrinsic execution and its result
+   */
+  async close(
+    signer: TSigner,
+    proposalHash: string,
+    proposalIndex: number,
+    weightBound: [number, number] | any = [20_000_000_000, 1000_000],
+    lengthBound = 10_000,
+  ) {
+    const result = await this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.close`, [
+      proposalHash,
+      proposalIndex,
+      weightBound,
+      lengthBound,
+    ]);
+    this.checkExecutedEvent(result.result.events);
+    return result;
+  }
+
+  /**
+   * Shut down a proposal, regardless of its current state.
+   * @param signer keyring of the disapprover. Must be root
+   * @param proposalHash hash of the proposal to close
+   * @returns promise of extrinsic execution and its result
+   */
+  disapproveProposal(signer: TSigner, proposalHash: string) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.disapproveProposal`, [proposalHash]);
+  }
+}
+
+export class CollectiveMembershipGroup extends HelperGroup<UniqueHelper> {
+  /**
+   * Pallet name to make an API call to. Examples: 'councilMembership', 'technicalCommitteeMembership'
+   */
+  private membership: string;
+
+  constructor(helper: UniqueHelper, membership: string) {
+    super(helper);
+    this.membership = membership;
+  }
+
+  /**
+   * Returns an array of members' addresses according to the membership pallet's perception.
+   * Note that it does not recognize the original pallet's members set with `setMembers()`.
+   */
+  async getMembers() {
+    return (await this.helper.callRpc(`api.query.${this.membership}.members`, [])).toHuman();
+  }
+
+  /**
+   * Returns the optional address of the prime member of the collective.
+   */
+  async getPrimeMember() {
+    return (await this.helper.callRpc(`api.query.${this.membership}.prime`, [])).toHuman();
+  }
+
+  /**
+   * Add a member to the collective.
+   * @param signer keyring of the setter. Must be root
+   * @param member address of the member to add
+   * @returns promise of extrinsic execution and its result
+   */
+  addMember(signer: TSigner, member: string) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.membership}.addMember`, [member]);
+  }
+
+  addMemberCall(member: string) {
+    return this.helper.constructApiCall(`api.tx.${this.membership}.addMember`, [member]);
+  }
+
+  /**
+   * Remove a member from the collective.
+   * @param signer keyring of the setter. Must be root
+   * @param member address of the member to remove
+   * @returns promise of extrinsic execution and its result
+   */
+  removeMember(signer: TSigner, member: string) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.membership}.removeMember`, [member]);
+  }
+
+  removeMemberCall(member: string) {
+    return this.helper.constructApiCall(`api.tx.${this.membership}.removeMember`, [member]);
+  }
+
+  /**
+   * Set members of the collective to the given list of addresses.
+   * @param signer keyring of the setter. Must be root (for the direct call, bypassing a public motion)
+   * @param members addresses of the members to set
+   * @returns promise of extrinsic execution and its result
+   */
+  resetMembers(signer: TSigner, members: string[]) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.membership}.resetMembers`, [members]);
+  }
+
+  /**
+   * Set the collective's prime member to the given address.
+   * @param signer keyring of the setter. Must be root (for the direct call, bypassing a public motion)
+   * @param prime address of the prime member of the collective
+   * @returns promise of extrinsic execution and its result
+   */
+  setPrime(signer: TSigner, prime: string) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.membership}.setPrime`, [prime]);
+  }
+
+  setPrimeCall(member: string) {
+    return this.helper.constructApiCall(`api.tx.${this.membership}.setPrime`, [member]);
+  }
+
+  /**
+   * Remove the collective's prime member.
+   * @param signer keyring of the setter. Must be root (for the direct call, bypassing a public motion)
+   * @returns promise of extrinsic execution and its result
+   */
+  clearPrime(signer: TSigner) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.membership}.clearPrime`, []);
+  }
+
+  clearPrimeCall() {
+    return this.helper.constructApiCall(`api.tx.${this.membership}.clearPrime`, []);
+  }
+}
+
+export class RankedCollectiveGroup extends HelperGroup<UniqueHelper> {
+  /**
+   * Pallet name to make an API call to. Examples: 'FellowshipCollective'
+   */
+  private collective: string;
+
+  constructor(helper: UniqueHelper, collective: string) {
+    super(helper);
+    this.collective = collective;
+  }
+
+  addMember(signer: TSigner, newMember: string) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.addMember`, [newMember]);
+  }
+
+  addMemberCall(newMember: string) {
+    return this.helper.constructApiCall(`api.tx.${this.collective}.addMember`, [newMember]);
+  }
+
+  removeMember(signer: TSigner, member: string, minRank: number) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.removeMember`, [member, minRank]);
+  }
+
+  removeMemberCall(newMember: string, minRank: number) {
+    return this.helper.constructApiCall(`api.tx.${this.collective}.removeMember`, [newMember, minRank]);
+  }
+
+  promote(signer: TSigner, member: string) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.promoteMember`, [member]);
+  }
+
+  promoteCall(member: string) {
+    return this.helper.constructApiCall(`api.tx.${this.collective}.promoteMember`, [member]);
+  }
+
+  demote(signer: TSigner, member: string) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.demoteMember`, [member]);
+  }
+
+  demoteCall(newMember: string) {
+    return this.helper.constructApiCall(`api.tx.${this.collective}.demoteMember`, [newMember]);
+  }
+
+  vote(signer: TSigner, pollIndex: number, aye: boolean) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.vote`, [pollIndex, aye]);
+  }
+
+  async getMembers() {
+    return (await this.helper.getApi().query.fellowshipCollective.members.keys())
+      .map((key) => key.args[0].toString());
+  }
+
+  async getMemberRank(member: string) {
+    return (await this.helper.callRpc('api.query.fellowshipCollective.members', [member])).toJSON().rank;
+  }
+}
+
+export class ReferendaGroup extends HelperGroup<UniqueHelper> {
+  /**
+   * Pallet name to make an API call to. Examples: 'FellowshipReferenda'
+   */
+  private referenda: string;
+
+  constructor(helper: UniqueHelper, referenda: string) {
+    super(helper);
+    this.referenda = referenda;
+  }
+
+  submit(
+    signer: TSigner,
+    proposalOrigin: string,
+    proposal: any,
+    enactmentMoment: any,
+  ) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.referenda}.submit`, [
+      {Origins: proposalOrigin},
+      proposal,
+      enactmentMoment,
+    ]);
+  }
+
+  placeDecisionDeposit(signer: TSigner, referendumIndex: number) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.referenda}.placeDecisionDeposit`, [referendumIndex]);
+  }
+
+  cancel(signer: TSigner, referendumIndex: number) {
+    return this.helper.executeExtrinsic(signer, `api.tx.${this.referenda}.cancel`, [referendumIndex]);
+  }
+
+  cancelCall(referendumIndex: number) {
+    return this.helper.constructApiCall(`api.tx.${this.referenda}.cancel`, [referendumIndex]);
+  }
+
+  async referendumInfo(referendumIndex: number) {
+    return (await this.helper.callRpc(`api.query.${this.referenda}.referendumInfoFor`, [referendumIndex])).toJSON();
+  }
+
+  async enactmentEventId(referendumIndex: number) {
+    const api = await this.helper.getApi();
+
+    const bytes = api.createType('([u8;8], Text, u32)', ['assembly', 'enactment', referendumIndex]).toU8a();
+    return blake2AsHex(bytes, 256);
+  }
+}
+
+export interface IFellowshipGroup {
+  collective: RankedCollectiveGroup;
+  referenda: ReferendaGroup;
+}
+
+export interface ICollectiveGroup {
+  collective: CollectiveGroup;
+  membership: CollectiveMembershipGroup;
+}
+
+export class DemocracyGroup extends HelperGroup<UniqueHelper> {
+  // todo displace proposal into types?
+  propose(signer: TSigner, call: any, deposit: bigint) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.propose', [{Inline: call.method.toHex()}, deposit]);
+  }
+
+  proposeWithPreimage(signer: TSigner, preimage: string, deposit: bigint) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.propose', [{Legacy: preimage}, deposit]);
+  }
+
+  proposeCall(call: any, deposit: bigint) {
+    return this.helper.constructApiCall('api.tx.democracy.propose', [{Inline: call.method.toHex()}, deposit]);
+  }
+
+  second(signer: TSigner, proposalIndex: number) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.second', [proposalIndex]);
+  }
+
+  externalPropose(signer: TSigner, proposalCall: any) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.externalPropose', [{Inline: proposalCall.method.toHex()}]);
+  }
+
+  externalProposeMajority(signer: TSigner, proposalCall: any) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.externalProposeMajority', [{Inline: proposalCall.method.toHex()}]);
+  }
+
+  externalProposeDefault(signer: TSigner, proposalCall: any) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.externalProposeDefault', [{Inline: proposalCall.method.toHex()}]);
+  }
+
+  externalProposeDefaultWithPreimage(signer: TSigner, preimage: string) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.externalProposeDefault', [{Legacy: preimage}]);
+  }
+
+  externalProposeCall(proposalCall: any) {
+    return this.helper.constructApiCall('api.tx.democracy.externalPropose', [{Inline: proposalCall.method.toHex()}]);
+  }
+
+  externalProposeMajorityCall(proposalCall: any) {
+    return this.helper.constructApiCall('api.tx.democracy.externalProposeMajority', [{Inline: proposalCall.method.toHex()}]);
+  }
+
+  externalProposeDefaultCall(proposalCall: any) {
+    return this.helper.constructApiCall('api.tx.democracy.externalProposeDefault', [{Inline: proposalCall.method.toHex()}]);
+  }
+
+  externalProposeDefaultWithPreimageCall(preimage: string) {
+    return this.helper.constructApiCall('api.tx.democracy.externalProposeDefault', [{Legacy: preimage}]);
+  }
+
+  // ... and blacklist external proposal hash.
+  vetoExternal(signer: TSigner, proposalHash: string) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.vetoExternal', [proposalHash]);
+  }
+
+  vetoExternalCall(proposalHash: string) {
+    return this.helper.constructApiCall('api.tx.democracy.vetoExternal', [proposalHash]);
+  }
+
+  blacklist(signer: TSigner, proposalHash: string, referendumIndex: number | null = null) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.blacklist', [proposalHash, referendumIndex]);
+  }
+
+  blacklistCall(proposalHash: string, referendumIndex: number | null = null) {
+    return this.helper.constructApiCall('api.tx.democracy.blacklist', [proposalHash, referendumIndex]);
+  }
+
+  // proposal. CancelProposalOrigin (root or all techcom)
+  cancelProposal(signer: TSigner, proposalIndex: number) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.cancelProposal', [proposalIndex]);
+  }
+
+  cancelProposalCall(proposalIndex: number) {
+    return this.helper.constructApiCall('api.tx.democracy.cancelProposal', [proposalIndex]);
+  }
+
+  clearPublicProposals(signer: TSigner) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.clearPublicProposals', []);
+  }
+
+  fastTrack(signer: TSigner, proposalHash: string, votingPeriod: number, delayPeriod: number) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.fastTrack', [proposalHash, votingPeriod, delayPeriod]);
+  }
+
+  fastTrackCall(proposalHash: string, votingPeriod: number, delayPeriod: number) {
+    return this.helper.constructApiCall('api.tx.democracy.fastTrack', [proposalHash, votingPeriod, delayPeriod]);
+  }
+
+  // referendum. CancellationOrigin (TechCom member)
+  emergencyCancel(signer: TSigner, referendumIndex: number) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.emergencyCancel', [referendumIndex]);
+  }
+
+  emergencyCancelCall(referendumIndex: number) {
+    return this.helper.constructApiCall('api.tx.democracy.emergencyCancel', [referendumIndex]);
+  }
+
+  vote(signer: TSigner, referendumIndex: number, vote: any) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.vote', [referendumIndex, vote]);
+  }
+
+  removeVote(signer: TSigner, referendumIndex: number, targetAccount?: string) {
+    if(targetAccount) {
+      return this.helper.executeExtrinsic(signer, 'api.tx.democracy.removeOtherVote', [targetAccount, referendumIndex]);
+    } else {
+      return this.helper.executeExtrinsic(signer, 'api.tx.democracy.removeVote', [referendumIndex]);
+    }
+  }
+
+  unlock(signer: TSigner, targetAccount: string) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.unlock', [targetAccount]);
+  }
+
+  delegate(signer: TSigner, toAccount: string, conviction: PalletDemocracyConviction, balance: bigint) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.delegate', [toAccount, conviction, balance]);
+  }
+
+  undelegate(signer: TSigner) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.undelegate', []);
+  }
+
+  async referendumInfo(referendumIndex: number) {
+    return (await this.helper.callRpc('api.query.democracy.referendumInfoOf', [referendumIndex])).toJSON();
+  }
+
+  async publicProposals() {
+    return (await this.helper.callRpc('api.query.democracy.publicProps', [])).toJSON();
+  }
+
+  async findPublicProposal(proposalIndex: number) {
+    const proposalInfo = (await this.publicProposals()).find((proposalInfo: any[]) => proposalInfo[0] == proposalIndex);
+
+    return proposalInfo ? proposalInfo[1] : null;
+  }
+
+  async expectPublicProposal(proposalIndex: number) {
+    const proposal = await this.findPublicProposal(proposalIndex);
+
+    if(proposal) {
+      return proposal;
+    } else {
+      throw Error(`Proposal #${proposalIndex} is expected to exist`);
+    }
+  }
+
+  async getExternalProposal() {
+    return (await this.helper.callRpc('api.query.democracy.nextExternal', []));
+  }
+
+  async expectExternalProposal() {
+    const proposal = await this.getExternalProposal();
+
+    if(proposal) {
+      return proposal;
+    } else {
+      throw Error('An external proposal is expected to exist');
+    }
+  }
+
+  /* setMetadata? */
+
+  /* todo?
+  referendumVote(signer: TSigner, referendumIndex: number, accountVote: DemocracyStandardAccountVote) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.democracy.vote', [referendumIndex, {Standard: accountVote}], true);
+  }*/
+}

--- /dev/null
+++ b/js-packages/test-utils/index.ts
@@ -0,0 +1,1646 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+import '@unique-nft/opal-testnet-types/augment-api.js';
+import '@unique-nft/opal-testnet-types/augment-types.js';
+import '@unique-nft/opal-testnet-types/types-lookup.js';
+
+import {stringToU8a} from '@polkadot/util';
+import {blake2AsHex, encodeAddress, mnemonicGenerate} from '@polkadot/util-crypto';
+import type {ChainHelperBaseConstructor, UniqueHelperConstructor} from '@unique-nft/playgrounds/unique.js';
+import {UniqueHelper, ChainHelperBase, HelperGroup} from '@unique-nft/playgrounds/unique.js';
+import {ApiPromise, Keyring, WsProvider} from '@polkadot/api';
+import * as defs from '@unique-nft/opal-testnet-types/definitions.js';
+import type {IKeyringPair} from '@polkadot/types/types';
+import type {EventRecord} from '@polkadot/types/interfaces';
+import type {ICrossAccountId, ILogger, IPovInfo, ISchedulerOptions, ITransactionResult, TSigner} from '@unique-nft/playgrounds/types.js';
+import type {FrameSystemEventRecord, StagingXcmV2TraitsError, StagingXcmV3TraitsOutcome} from '@polkadot/types/lookup';
+import type {SignerOptions, VoidFn} from '@polkadot/api/types';
+import {spawnSync} from 'child_process';
+import {AcalaHelper, AstarHelper, MoonbeamHelper, PolkadexHelper, RelayHelper, WestmintHelper, ForeignAssetsGroup, XcmGroup, XTokensGroup, TokensGroup, HydraDxHelper} from './xcm/index.js';
+import {CollectiveGroup, CollectiveMembershipGroup, DemocracyGroup, RankedCollectiveGroup, ReferendaGroup} from './governance.js';
+import type {ICollectiveGroup, IFellowshipGroup} from './governance.js';
+
+export class SilentLogger {
+  log(_msg: any, _level: any): void { }
+  level = {
+    ERROR: 'ERROR' as const,
+    WARNING: 'WARNING' as const,
+    INFO: 'INFO' as const,
+  };
+}
+
+export class SilentConsole {
+  // TODO: Remove, this is temporary: Filter unneeded API output
+  // (Jaco promised it will be removed in the next version)
+  consoleErr: any;
+  consoleLog: any;
+  consoleWarn: any;
+
+  constructor() {
+    this.consoleErr = console.error;
+    this.consoleLog = console.log;
+    this.consoleWarn = console.warn;
+  }
+
+  enable() {
+    const outFn = (printer: any) => (...args: any[]) => {
+      for(const arg of args) {
+        if(typeof arg !== 'string')
+          continue;
+        const skippedWarnings = ['1000:: Normal connection closure', 'Not decorating unknown runtime apis:', 'RPC methods not decorated:', 'Not decorating runtime apis', 'Bad input data provided to validate_transaction', 'account balance too low', '1006:: Abnormal Closure'];
+        const needToSkip = skippedWarnings.reduce((a,  b) => a || arg.includes(b), false);
+        if(needToSkip || arg === 'Normal connection closure')
+          return;
+      }
+      printer(...args);
+    };
+
+    console.error = outFn(this.consoleErr.bind(console));
+    console.log = outFn(this.consoleLog.bind(console));
+    console.warn = outFn(this.consoleWarn.bind(console));
+  }
+
+  disable() {
+    console.error = this.consoleErr;
+    console.log = this.consoleLog;
+    console.warn = this.consoleWarn;
+  }
+}
+
+export interface IEventHelper {
+  section(): string;
+
+  method(): string;
+
+  wrapEvent(data: any[]): any;
+}
+
+// eslint-disable-next-line @typescript-eslint/naming-convention
+function EventHelper(section: string, method: string, wrapEvent: (data: any[]) => any) {
+  const helperClass = class implements IEventHelper {
+    wrapEvent: (data: any[]) => any;
+    _section: string;
+    _method: string;
+
+    constructor() {
+      this.wrapEvent = wrapEvent;
+      this._section = section;
+      this._method = method;
+    }
+
+    section(): string {
+      return this._section;
+    }
+
+    method(): string {
+      return this._method;
+    }
+
+    filter(txres: ITransactionResult) {
+      return txres.result.events.filter(e => e.event.section === section && e.event.method === method)
+        .map(e => this.wrapEvent(e.event.data));
+    }
+
+    find(txres: ITransactionResult) {
+      const e = txres.result.events.find(e => e.event.section === section && e.event.method === method);
+      return e ? this.wrapEvent(e.event.data) : null;
+    }
+
+    expect(txres: ITransactionResult) {
+      const e = this.find(txres);
+      if(e) {
+        return e;
+      } else {
+        throw Error(`Expected event ${section}.${method}`);
+      }
+    }
+  };
+
+  return helperClass;
+}
+
+function eventJsonData<T = any>(data: any[], index: number) {
+  return data[index].toJSON() as T;
+}
+
+function eventHumanData(data: any[], index: number) {
+  return data[index].toHuman();
+}
+
+function eventData<T = any>(data: any[], index: number) {
+  return data[index] as T;
+}
+
+// eslint-disable-next-line @typescript-eslint/naming-convention
+function EventSection(section: string) {
+  return class Section {
+    static section = section;
+
+    static Method(name: string, wrapEvent: (data: any[]) => any = () => {}) {
+      const helperClass = EventHelper(Section.section, name, wrapEvent);
+      return new helperClass();
+    }
+  };
+}
+
+function schedulerSection(schedulerInstance: string) {
+  return class extends EventSection(schedulerInstance) {
+    static Dispatched = this.Method('Dispatched', data => ({
+      task: eventJsonData(data, 0),
+      id: eventHumanData(data, 1),
+      result: data[2],
+    }));
+
+    static PriorityChanged = this.Method('PriorityChanged', data => ({
+      task: eventJsonData(data, 0),
+      priority: eventJsonData(data, 1),
+    }));
+  };
+}
+
+export class Event {
+  static Democracy = class extends EventSection('democracy') {
+    static Proposed = this.Method('Proposed', data => ({
+      proposalIndex: eventJsonData<number>(data, 0),
+    }));
+
+    static ExternalTabled = this.Method('ExternalTabled');
+
+    static Started = this.Method('Started', data => ({
+      referendumIndex: eventJsonData<number>(data, 0),
+      threshold: eventHumanData(data, 1),
+    }));
+
+    static Voted = this.Method('Voted', data => ({
+      voter: eventJsonData(data, 0),
+      referendumIndex: eventJsonData<number>(data, 1),
+      vote: eventJsonData(data, 2),
+    }));
+
+    static Passed = this.Method('Passed', data => ({
+      referendumIndex: eventJsonData<number>(data, 0),
+    }));
+
+    static ProposalCanceled = this.Method('ProposalCanceled', data => ({
+      propIndex: eventJsonData<number>(data, 0),
+    }));
+
+    static Cancelled = this.Method('Cancelled', data => ({
+      propIndex: eventJsonData<number>(data, 0),
+    }));
+
+    static Vetoed = this.Method('Vetoed', data => ({
+      who: eventHumanData(data, 0),
+      proposalHash: eventHumanData(data, 1),
+      until: eventJsonData<number>(data, 1),
+    }));
+  };
+
+  static Council = class extends EventSection('council') {
+    static Proposed = this.Method('Proposed', data => ({
+      account: eventHumanData(data, 0),
+      proposalIndex: eventJsonData<number>(data, 1),
+      proposalHash: eventHumanData(data, 2),
+      threshold: eventJsonData<number>(data, 3),
+    }));
+    static Closed = this.Method('Closed', data => ({
+      proposalHash: eventHumanData(data, 0),
+      yes: eventJsonData<number>(data, 1),
+      no: eventJsonData<number>(data, 2),
+    }));
+    static Executed = this.Method('Executed', data => ({
+      proposalHash: eventHumanData(data, 0),
+    }));
+  };
+
+  static TechnicalCommittee = class extends EventSection('technicalCommittee') {
+    static Proposed = this.Method('Proposed', data => ({
+      account: eventHumanData(data, 0),
+      proposalIndex: eventJsonData<number>(data, 1),
+      proposalHash: eventHumanData(data, 2),
+      threshold: eventJsonData<number>(data, 3),
+    }));
+    static Closed = this.Method('Closed', data => ({
+      proposalHash: eventHumanData(data, 0),
+      yes: eventJsonData<number>(data, 1),
+      no: eventJsonData<number>(data, 2),
+    }));
+    static Approved = this.Method('Approved', data => ({
+      proposalHash: eventHumanData(data, 0),
+    }));
+    static Executed = this.Method('Executed', data => ({
+      proposalHash: eventHumanData(data, 0),
+      result: eventHumanData(data, 1),
+    }));
+  };
+
+  static FellowshipReferenda = class extends EventSection('fellowshipReferenda') {
+    static Submitted = this.Method('Submitted', data => ({
+      referendumIndex: eventJsonData<number>(data, 0),
+      trackId: eventJsonData<number>(data, 1),
+      proposal: eventJsonData(data, 2),
+    }));
+
+    static Cancelled = this.Method('Cancelled', data => ({
+      index: eventJsonData<number>(data, 0),
+      tally: eventJsonData(data, 1),
+    }));
+  };
+
+  static UniqueScheduler = schedulerSection('uniqueScheduler');
+  static Scheduler = schedulerSection('scheduler');
+
+  static XcmpQueue = class extends EventSection('xcmpQueue') {
+    static XcmpMessageSent = this.Method('XcmpMessageSent', data => ({
+      messageHash: eventJsonData(data, 0),
+    }));
+
+    static Success = this.Method('Success', data => ({
+      messageHash: eventJsonData(data, 0),
+    }));
+
+    static Fail = this.Method('Fail', data => ({
+      messageHash: eventJsonData(data, 0),
+      outcome: eventData<StagingXcmV2TraitsError>(data, 2),
+    }));
+  };
+
+  static DmpQueue = class extends EventSection('dmpQueue') {
+    static ExecutedDownward = this.Method('ExecutedDownward', data => ({
+      outcome: eventData<StagingXcmV3TraitsOutcome>(data, 2),
+    }));
+  };
+}
+
+// eslint-disable-next-line @typescript-eslint/naming-convention
+export function SudoHelper<T extends ChainHelperBaseConstructor>(Base: T) {
+  return class extends Base {
+    constructor(...args: any[]) {
+      super(...args);
+    }
+
+    override async executeExtrinsic(
+      sender: IKeyringPair,
+      extrinsic: string,
+      params: any[],
+      expectSuccess?: boolean,
+      options: Partial<SignerOptions> | null = null,
+    ): Promise<ITransactionResult> {
+      const call = this.constructApiCall(extrinsic, params);
+      const result = await super.executeExtrinsic(
+        sender,
+        'api.tx.sudo.sudo',
+        [call],
+        expectSuccess,
+        options,
+      );
+
+      if(result.status === 'Fail') return result;
+
+      const data = (result.result.events.find(x => x.event.section == 'sudo' && x.event.method == 'Sudid')?.event.data as any).sudoResult;
+      if(data.isErr) {
+        if(data.asErr.isModule) {
+          const error = (result.result.events[1].event.data as any).sudoResult.asErr.asModule;
+          const metaError = super.getApi()?.registry.findMetaError(error);
+          throw new Error(`${metaError.section}.${metaError.name}`);
+        } else if(data.asErr.isToken) {
+          throw new Error(`Token: ${data.asErr.asToken}`);
+        }
+        // May be [object Object] in case of unhandled non-unit enum
+        throw new Error(`Misc: ${data.asErr.toHuman()}`);
+      }
+      return result;
+    }
+    override async executeExtrinsicUncheckedWeight(
+      sender: IKeyringPair,
+      extrinsic: string,
+      params: any[],
+      expectSuccess?: boolean,
+      options: Partial<SignerOptions> | null = null,
+    ): Promise<ITransactionResult> {
+      const call = this.constructApiCall(extrinsic, params);
+      const result = await super.executeExtrinsic(
+        sender,
+        'api.tx.sudo.sudoUncheckedWeight',
+        [call, {refTime: 0, proofSize: 0}],
+        expectSuccess,
+        options,
+      );
+
+      if(result.status === 'Fail') return result;
+
+      const data = (result.result.events.find(x => x.event.section == 'sudo' && x.event.method == 'Sudid')?.event.data as any).sudoResult;
+      if(data.isErr) {
+        if(data.asErr.isModule) {
+          const error = (result.result.events[1].event.data as any).sudoResult.asErr.asModule;
+          const metaError = super.getApi()?.registry.findMetaError(error);
+          throw new Error(`${metaError.section}.${metaError.name}`);
+        } else if(data.asErr.isToken) {
+          throw new Error(`Token: ${data.asErr.asToken}`);
+        }
+        // May be [object Object] in case of unhandled non-unit enum
+        throw new Error(`Misc: ${data.asErr.toHuman()}`);
+      }
+      return result;
+    }
+  };
+}
+
+class SchedulerGroup extends HelperGroup<UniqueHelper> {
+  constructor(helper: UniqueHelper) {
+    super(helper);
+  }
+
+  cancelScheduled(signer: TSigner, scheduledId: string) {
+    return this.helper.executeExtrinsic(
+      signer,
+      'api.tx.scheduler.cancelNamed',
+      [scheduledId],
+      true,
+    );
+  }
+
+  changePriority(signer: TSigner, scheduledId: string, priority: number) {
+    return this.helper.executeExtrinsic(
+      signer,
+      'api.tx.scheduler.changeNamedPriority',
+      [scheduledId, priority],
+      true,
+    );
+  }
+
+  scheduleAt<T extends DevUniqueHelper>(
+    executionBlockNumber: number,
+    options: ISchedulerOptions = {},
+  ) {
+    return this.schedule<T>('schedule', executionBlockNumber, options);
+  }
+
+  scheduleAfter<T extends DevUniqueHelper>(
+    blocksBeforeExecution: number,
+    options: ISchedulerOptions = {},
+  ) {
+    return this.schedule<T>('scheduleAfter', blocksBeforeExecution, options);
+  }
+
+  schedule<T extends UniqueHelper>(
+    scheduleFn: 'schedule' | 'scheduleAfter',
+    blocksNum: number,
+    options: ISchedulerOptions = {},
+  ) {
+    // eslint-disable-next-line @typescript-eslint/naming-convention
+    const ScheduledHelperType = ScheduledUniqueHelper(this.helper.helperBase);
+    return this.helper.clone(ScheduledHelperType, {
+      scheduleFn,
+      blocksNum,
+      options,
+    }) as T;
+  }
+}
+
+class CollatorSelectionGroup extends HelperGroup<UniqueHelper> {
+  //todo:collator documentation
+  addInvulnerable(signer: TSigner, address: string) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.collatorSelection.addInvulnerable', [address]);
+  }
+
+  removeInvulnerable(signer: TSigner, address: string) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.collatorSelection.removeInvulnerable', [address]);
+  }
+
+  async getInvulnerables(): Promise<string[]> {
+    return (await this.helper.callRpc('api.query.collatorSelection.invulnerables')).map((x: any) => x.toHuman());
+  }
+
+  /** and also total max invulnerables */
+  maxCollators(): number {
+    return (this.helper.getApi().consts.configuration.defaultCollatorSelectionMaxCollators.toJSON() as number);
+  }
+
+  async getDesiredCollators(): Promise<number> {
+    return (await this.helper.callRpc('api.query.configuration.collatorSelectionDesiredCollatorsOverride')).toNumber();
+  }
+
+  setLicenseBond(signer: TSigner, amount: bigint) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.configuration.setCollatorSelectionLicenseBond', [amount]);
+  }
+
+  async getLicenseBond(): Promise<bigint> {
+    return (await this.helper.callRpc('api.query.configuration.collatorSelectionLicenseBondOverride')).toBigInt();
+  }
+
+  obtainLicense(signer: TSigner) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.collatorSelection.getLicense', []);
+  }
+
+  releaseLicense(signer: TSigner) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.collatorSelection.releaseLicense', []);
+  }
+
+  forceReleaseLicense(signer: TSigner, released: string) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.collatorSelection.forceReleaseLicense', [released]);
+  }
+
+  async hasLicense(address: string): Promise<bigint> {
+    return (await this.helper.callRpc('api.query.collatorSelection.licenseDepositOf', [address])).toBigInt();
+  }
+
+  onboard(signer: TSigner) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.collatorSelection.onboard', []);
+  }
+
+  offboard(signer: TSigner) {
+    return this.helper.executeExtrinsic(signer, 'api.tx.collatorSelection.offboard', []);
+  }
+
+  async getCandidates(): Promise<string[]> {
+    return (await this.helper.callRpc('api.query.collatorSelection.candidates')).map((x: any) => x.toHuman());
+  }
+}
+
+export class DevUniqueHelper extends UniqueHelper {
+  /**
+   * Arrange methods for tests
+   */
+  arrange: ArrangeGroup;
+  wait: WaitGroup;
+  admin: AdminGroup;
+  session: SessionGroup;
+  testUtils: TestUtilGroup;
+  foreignAssets: ForeignAssetsGroup;
+  xcm: XcmGroup<DevUniqueHelper>;
+  xTokens: XTokensGroup<DevUniqueHelper>;
+  tokens: TokensGroup<DevUniqueHelper>;
+  scheduler: SchedulerGroup;
+  collatorSelection: CollatorSelectionGroup;
+  council: ICollectiveGroup;
+  technicalCommittee: ICollectiveGroup;
+  fellowship: IFellowshipGroup;
+  democracy: DemocracyGroup;
+
+  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {
+    options.helperBase = options.helperBase ?? DevUniqueHelper;
+
+    super(logger, options);
+    this.arrange = new ArrangeGroup(this);
+    this.wait = new WaitGroup(this);
+    this.admin = new AdminGroup(this);
+    this.testUtils = new TestUtilGroup(this);
+    this.session = new SessionGroup(this);
+    this.foreignAssets = new ForeignAssetsGroup(this);
+    this.xcm = new XcmGroup(this, 'polkadotXcm');
+    this.xTokens = new XTokensGroup(this);
+    this.tokens = new TokensGroup(this);
+    this.scheduler = new SchedulerGroup(this);
+    this.collatorSelection = new CollatorSelectionGroup(this);
+    this.council = {
+      collective: new CollectiveGroup(this, 'council'),
+      membership: new CollectiveMembershipGroup(this, 'councilMembership'),
+    };
+    this.technicalCommittee = {
+      collective: new CollectiveGroup(this, 'technicalCommittee'),
+      membership: new CollectiveMembershipGroup(this, 'technicalCommitteeMembership'),
+    };
+    this.fellowship = {
+      collective: new RankedCollectiveGroup(this, 'fellowshipCollective'),
+      referenda: new ReferendaGroup(this, 'fellowshipReferenda'),
+    };
+    this.democracy = new DemocracyGroup(this);
+  }
+
+  override async connect(wsEndpoint: string, _listeners?: any): Promise<void> {
+    if(!wsEndpoint) throw new Error('wsEndpoint was not set');
+    const wsProvider = new WsProvider(wsEndpoint);
+    this.api = new ApiPromise({
+      provider: wsProvider,
+      signedExtensions: {
+        ContractHelpers: {
+          extrinsic: {},
+          payload: {},
+        },
+        CheckMaintenance: {
+          extrinsic: {},
+          payload: {},
+        },
+        DisableIdentityCalls: {
+          extrinsic: {},
+          payload: {},
+        },
+        FakeTransactionFinalizer: {
+          extrinsic: {},
+          payload: {},
+        },
+      },
+      rpc: {
+        unique: defs.unique.rpc,
+        appPromotion: defs.appPromotion.rpc,
+        povinfo: defs.povinfo.rpc,
+        eth: {
+          feeHistory: {
+            description: 'Dummy',
+            params: [],
+            type: 'u8',
+          },
+          maxPriorityFeePerGas: {
+            description: 'Dummy',
+            params: [],
+            type: 'u8',
+          },
+        },
+      },
+    });
+    await this.api.isReadyOrError;
+    this.network = await UniqueHelper.detectNetwork(this.api);
+    this.wsEndpoint = wsEndpoint;
+  }
+  getSudo<T extends DevUniqueHelper>() {
+    // eslint-disable-next-line @typescript-eslint/naming-convention
+    const SudoHelperType = SudoHelper(this.helperBase);
+    return this.clone(SudoHelperType) as T;
+  }
+}
+
+export class DevRelayHelper extends RelayHelper {
+  wait: WaitGroup;
+
+  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {
+    options.helperBase = options.helperBase ?? DevRelayHelper;
+
+    super(logger, options);
+    this.wait = new WaitGroup(this);
+  }
+
+  getSudo() {
+    // eslint-disable-next-line @typescript-eslint/naming-convention
+    const SudoHelperType = SudoHelper(this.helperBase);
+    return this.clone(SudoHelperType) as DevRelayHelper;
+  }
+}
+
+export class DevWestmintHelper extends WestmintHelper {
+  wait: WaitGroup;
+
+  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {
+    options.helperBase = options.helperBase ?? DevWestmintHelper;
+
+    super(logger, options);
+    this.wait = new WaitGroup(this);
+  }
+}
+
+export class DevStatemineHelper extends DevWestmintHelper {}
+
+export class DevStatemintHelper extends DevWestmintHelper {}
+
+export class DevMoonbeamHelper extends MoonbeamHelper {
+  account: MoonbeamAccountGroup;
+  wait: WaitGroup;
+  fastDemocracy: MoonbeamFastDemocracyGroup;
+
+  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {
+    options.helperBase = options.helperBase ?? DevMoonbeamHelper;
+    options.notePreimagePallet = options.notePreimagePallet ?? 'preimage';
+
+    super(logger, options);
+    this.account = new MoonbeamAccountGroup(this);
+    this.wait = new WaitGroup(this);
+    this.fastDemocracy = new MoonbeamFastDemocracyGroup(this);
+  }
+}
+
+export class DevMoonriverHelper extends DevMoonbeamHelper {
+  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {
+    options.notePreimagePallet = options.notePreimagePallet ?? 'preimage';
+    super(logger, options);
+  }
+}
+
+export class DevAstarHelper extends AstarHelper {
+  wait: WaitGroup;
+
+  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {
+    options.helperBase = options.helperBase ?? DevAstarHelper;
+
+    super(logger, options);
+    this.wait = new WaitGroup(this);
+  }
+
+  getSudo<T extends AstarHelper>() {
+    // eslint-disable-next-line @typescript-eslint/naming-convention
+    const SudoHelperType = SudoHelper(this.helperBase);
+    return this.clone(SudoHelperType) as T;
+  }
+}
+
+export class DevShidenHelper extends DevAstarHelper { }
+
+export class DevAcalaHelper extends AcalaHelper {
+  wait: WaitGroup;
+
+  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {
+    options.helperBase = options.helperBase ?? DevAcalaHelper;
+
+    super(logger, options);
+    this.wait = new WaitGroup(this);
+  }
+  getSudo() {
+    // eslint-disable-next-line @typescript-eslint/naming-convention
+    const SudoHelperType = SudoHelper(this.helperBase);
+    return this.clone(SudoHelperType) as DevAcalaHelper;
+  }
+}
+
+export class DevPolkadexHelper extends PolkadexHelper {
+  wait: WaitGroup;
+  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {
+    options.helperBase = options.helperBase ?? PolkadexHelper;
+
+    super(logger, options);
+    this.wait = new WaitGroup(this);
+  }
+
+  getSudo() {
+    // eslint-disable-next-line @typescript-eslint/naming-convention
+    const SudoHelperType = SudoHelper(this.helperBase);
+    return this.clone(SudoHelperType) as DevPolkadexHelper;
+  }
+}
+
+export class DevHydraDxHelper extends HydraDxHelper {
+  wait: WaitGroup;
+  fastDemocracy: HydraFastDemocracyGroup;
+
+  constructor(logger: { log: (msg: any, level: any) => void, level: any }, options: {[key: string]: any} = {}) {
+    options.helperBase = options.helperBase ?? DevHydraDxHelper;
+
+    super(logger, options);
+
+    this.wait = new WaitGroup(this);
+    this.fastDemocracy = new HydraFastDemocracyGroup(this);
+  }
+}
+
+export class DevKaruraHelper extends DevAcalaHelper {}
+
+export class ArrangeGroup {
+  helper: DevUniqueHelper;
+
+  scheduledIdSlider = 0;
+
+  constructor(helper: DevUniqueHelper) {
+    this.helper = helper;
+  }
+
+  /**
+   * Generates accounts with the specified UNQ token balance
+   * @param balances balances for generated accounts. Each balance will be multiplied by the token nominal.
+   * @param donor donor account for balances
+   * @returns array of newly created accounts
+   * @example const [acc1, acc2, acc3] = await createAccounts([0n, 10n, 20n], donor);
+   */
+  createAccounts = async (balances: bigint[], donor: IKeyringPair): Promise<IKeyringPair[]> => {
+    let nonce = await this.helper.chain.getNonce(donor.address);
+    const wait = new WaitGroup(this.helper);
+    const ss58Format = this.helper.chain.getChainProperties().ss58Format;
+    const tokenNominal = this.helper.balance.getOneTokenNominal();
+    const transactions = [];
+    const accounts: IKeyringPair[] = [];
+    for(const balance of balances) {
+      const recipient = this.helper.util.fromSeed(mnemonicGenerate(), ss58Format);
+      accounts.push(recipient);
+      if(balance !== 0n) {
+        const tx = this.helper.constructApiCall('api.tx.balances.transferKeepAlive', [{Id: recipient.address}, balance * tokenNominal]);
+        transactions.push(this.helper.signTransaction(donor, tx, {nonce}, 'account generation'));
+        nonce++;
+      }
+    }
+
+    await Promise.all(transactions).catch(_e => {});
+
+    //#region TODO remove this region, when nonce problem will be solved
+    const checkBalances = async () => {
+      let isSuccess = true;
+      for(let i = 0; i < balances.length; i++) {
+        const balance = await this.helper.balance.getSubstrate(accounts[i].address);
+        if(balance !== balances[i] * tokenNominal) {
+          isSuccess = false;
+          break;
+        }
+      }
+      return isSuccess;
+    };
+
+    let accountsCreated = false;
+    const maxBlocksChecked = await this.helper.arrange.isDevNode() ? 50 : 5;
+    // checkBalances retry up to 5-50 blocks
+    for(let index = 0; index < maxBlocksChecked; index++) {
+      accountsCreated = await checkBalances();
+      if(accountsCreated) break;
+      await wait.newBlocks(1);
+    }
+
+    if(!accountsCreated) throw Error('Accounts generation failed');
+    //#endregion
+
+    return accounts;
+  };
+
+  // TODO combine this method and createAccounts into one
+  createCrowd = async (accountsToCreate: number, withBalance: bigint, donor: IKeyringPair): Promise<IKeyringPair[]> => {
+    const createAsManyAsCan = async () => {
+      let transactions: any = [];
+      const accounts: IKeyringPair[] = [];
+      let nonce = await this.helper.chain.getNonce(donor.address);
+      const tokenNominal = this.helper.balance.getOneTokenNominal();
+      const ss58Format = this.helper.chain.getChainProperties().ss58Format;
+      for(let i = 0; i < accountsToCreate; i++) {
+        if(i === 500) { // if there are too many accounts to create
+          await Promise.allSettled(transactions); // wait while first 500 (should be 100 for devnode) tx will be settled
+          transactions = []; //
+          nonce = await this.helper.chain.getNonce(donor.address); // update nonce
+        }
+        const recipient = this.helper.util.fromSeed(mnemonicGenerate(), ss58Format);
+        accounts.push(recipient);
+        if(withBalance !== 0n) {
+          const tx = this.helper.constructApiCall('api.tx.balances.transferKeepAlive', [{Id: recipient.address}, withBalance * tokenNominal]);
+          transactions.push(this.helper.signTransaction(donor, tx, {nonce}, 'account generation'));
+          nonce++;
+        }
+      }
+
+      const fullfilledAccounts = [];
+      await Promise.allSettled(transactions);
+      for(const account of accounts) {
+        const accountBalance = await this.helper.balance.getSubstrate(account.address);
+        if(accountBalance === withBalance * tokenNominal) {
+          fullfilledAccounts.push(account);
+        }
+      }
+      return fullfilledAccounts;
+    };
+
+
+    const crowd: IKeyringPair[] = [];
+    // do up to 5 retries
+    for(let index = 0; index < 5 && accountsToCreate !== 0; index++) {
+      const asManyAsCan = await createAsManyAsCan();
+      crowd.push(...asManyAsCan);
+      accountsToCreate -= asManyAsCan.length;
+    }
+
+    if(accountsToCreate !== 0) throw Error(`Crowd generation failed: ${accountsToCreate} accounts left`);
+
+    return crowd;
+  };
+
+  /**
+   * Generates one account with zero balance
+   * @returns the newly generated account
+   * @example const account = await helper.arrange.createEmptyAccount();
+   */
+  createEmptyAccount = (): IKeyringPair => {
+    const ss58Format = this.helper.chain.getChainProperties().ss58Format;
+    return this.helper.util.fromSeed(mnemonicGenerate(), ss58Format);
+  };
+
+  isDevNode = async () => {
+    let blockNumber = (await this.helper.callRpc('api.query.system.number')).toJSON();
+    if(blockNumber == 0) {
+      await this.helper.wait.newBlocks(1);
+      blockNumber = (await this.helper.callRpc('api.query.system.number')).toJSON();
+    }
+    const block2 = await this.helper.callRpc('api.rpc.chain.getBlock', [await this.helper.callRpc('api.rpc.chain.getBlockHash', [blockNumber])]);
+    const block1 = await this.helper.callRpc('api.rpc.chain.getBlock', [await this.helper.callRpc('api.rpc.chain.getBlockHash', [blockNumber - 1])]);
+    const findCreationDate = (block: any) => {
+      const humanBlock = block.toHuman();
+      let date;
+      humanBlock.block.extrinsics.forEach((ext: any) => {
+        if(ext.method.section === 'timestamp') {
+          date = Number(ext.method.args.now.replaceAll(',', ''));
+        }
+      });
+      return date;
+    };
+    const block1date = await findCreationDate(block1);
+    const block2date = await findCreationDate(block2);
+    if(block2date! - block1date! < 9000) return true;
+    return false;
+  };
+
+  async calculcateFee(payer: ICrossAccountId, promise: () => Promise<any>): Promise<bigint> {
+    const address = 'Substrate' in payer ? payer.Substrate : this.helper.address.ethToSubstrate(payer.Ethereum);
+    let balance = await this.helper.balance.getSubstrate(address);
+
+    await promise();
+
+    balance -= await this.helper.balance.getSubstrate(address);
+
+    return balance;
+  }
+
+  async calculatePoVInfo(txs: any[]): Promise<IPovInfo> {
+    const rawPovInfo = await this.helper.callRpc('api.rpc.povinfo.estimateExtrinsicPoV', [txs]);
+
+    const kvJson: {[key: string]: string} = {};
+
+    for(const kv of rawPovInfo.keyValues) {
+      kvJson[kv.key.toHex()] = kv.value.toHex();
+    }
+
+    const kvStr = JSON.stringify(kvJson);
+
+    const chainql = spawnSync(
+      'chainql',
+      [
+        `--tla-code=data=${kvStr}`,
+        '-e', `function(data) cql.dump(cql.chain("${this.helper.getEndpoint()}").latest._meta, data, {omit_empty:true})`,
+      ],
+    );
+
+    if(!chainql.stdout) {
+      throw Error('unable to get an output from the `chainql`');
+    }
+
+    return {
+      proofSize: rawPovInfo.proofSize.toNumber(),
+      compactProofSize: rawPovInfo.compactProofSize.toNumber(),
+      compressedProofSize: rawPovInfo.compressedProofSize.toNumber(),
+      results: rawPovInfo.results,
+      kv: JSON.parse(chainql.stdout.toString()),
+    };
+  }
+
+  calculatePalletAddress(palletId: any) {
+    const address = stringToU8a(('modl' + palletId).padEnd(32, '\0'));
+    return encodeAddress(address, this.helper.chain.getChainProperties().ss58Format);
+  }
+
+  makeScheduledIds(num: number): string[] {
+    function makeId(slider: number) {
+      const scheduledIdSize = 64;
+      const hexId = slider.toString(16);
+      const prefixSize = scheduledIdSize - hexId.length;
+
+      const scheduledId = '0x' + '0'.repeat(prefixSize) + hexId;
+
+      return scheduledId;
+    }
+
+    const ids = [];
+    for(let i = 0; i < num; i++) {
+      ids.push(makeId(this.scheduledIdSlider));
+      this.scheduledIdSlider += 1;
+    }
+
+    return ids;
+  }
+
+  makeScheduledId(): string {
+    return (this.makeScheduledIds(1))[0];
+  }
+
+  async captureEvents(eventSection: string, eventMethod: string): Promise<EventCapture> {
+    const capture = new EventCapture(this.helper, eventSection, eventMethod);
+    await capture.startCapture();
+
+    return capture;
+  }
+
+  makeXcmProgramWithdrawDeposit(beneficiary: Uint8Array, id: any, amount: bigint) {
+    return {
+      V2: [
+        {
+          WithdrawAsset: [
+            {
+              id,
+              fun: {
+                Fungible: amount,
+              },
+            },
+          ],
+        },
+        {
+          BuyExecution: {
+            fees: {
+              id,
+              fun: {
+                Fungible: amount,
+              },
+            },
+            weightLimit: 'Unlimited',
+          },
+        },
+        {
+          DepositAsset: {
+            assets: {
+              Wild: 'All',
+            },
+            maxAssets: 1,
+            beneficiary: {
+              parents: 0,
+              interior: {
+                X1: {
+                  AccountId32: {
+                    network: 'Any',
+                    id: beneficiary,
+                  },
+                },
+              },
+            },
+          },
+        },
+      ],
+    };
+  }
+
+  makeXcmProgramReserveAssetDeposited(beneficiary: Uint8Array, id: any, amount: bigint) {
+    return {
+      V2: [
+        {
+          ReserveAssetDeposited: [
+            {
+              id,
+              fun: {
+                Fungible: amount,
+              },
+            },
+          ],
+        },
+        {
+          BuyExecution: {
+            fees: {
+              id,
+              fun: {
+                Fungible: amount,
+              },
+            },
+            weightLimit: 'Unlimited',
+          },
+        },
+        {
+          DepositAsset: {
+            assets: {
+              Wild: 'All',
+            },
+            maxAssets: 1,
+            beneficiary: {
+              parents: 0,
+              interior: {
+                X1: {
+                  AccountId32: {
+                    network: 'Any',
+                    id: beneficiary,
+                  },
+                },
+              },
+            },
+          },
+        },
+      ],
+    };
+  }
+
+  makeUnpaidSudoTransactProgram(info: {weightMultiplier: number, call: string}) {
+    return {
+      V3: [
+        {
+          UnpaidExecution: {
+            weightLimit: 'Unlimited',
+            checkOrigin: null,
+          },
+        },
+        {
+          Transact: {
+            originKind: 'Superuser',
+            requireWeightAtMost: {
+              refTime: info.weightMultiplier * 200000000,
+              proofSize: info.weightMultiplier * 3000,
+            },
+            call: {
+              encoded: info.call,
+            },
+          },
+        },
+      ],
+    };
+  }
+}
+
+class MoonbeamAccountGroup {
+  helper: MoonbeamHelper;
+
+  keyring: Keyring;
+  _alithAccount: IKeyringPair;
+  _baltatharAccount: IKeyringPair;
+  _dorothyAccount: IKeyringPair;
+
+  constructor(helper: MoonbeamHelper) {
+    this.helper = helper;
+
+    this.keyring = new Keyring({type: 'ethereum'});
+    const alithPrivateKey = '0x5fb92d6e98884f76de468fa3f6278f8807c48bebc13595d45af5bdc4da702133';
+    const baltatharPrivateKey = '0x8075991ce870b93a8870eca0c0f91913d12f47948ca0fd25b49c6fa7cdbeee8b';
+    const dorothyPrivateKey = '0x39539ab1876910bbf3a223d84a29e28f1cb4e2e456503e7e91ed39b2e7223d68';
+
+    this._alithAccount = this.keyring.addFromUri(alithPrivateKey, undefined, 'ethereum');
+    this._baltatharAccount = this.keyring.addFromUri(baltatharPrivateKey, undefined, 'ethereum');
+    this._dorothyAccount = this.keyring.addFromUri(dorothyPrivateKey, undefined, 'ethereum');
+  }
+
+  alithAccount() {
+    return this._alithAccount;
+  }
+
+  baltatharAccount() {
+    return this._baltatharAccount;
+  }
+
+  dorothyAccount() {
+    return this._dorothyAccount;
+  }
+
+  create() {
+    return this.keyring.addFromUri(mnemonicGenerate());
+  }
+}
+
+class MoonbeamFastDemocracyGroup {
+  helper: DevMoonbeamHelper;
+
+  constructor(helper: DevMoonbeamHelper) {
+    this.helper = helper;
+  }
+
+  async executeProposal(proposalDesciption: string, encodedProposal: string) {
+    const proposalHash = blake2AsHex(encodedProposal);
+
+    const alithAccount = this.helper.account.alithAccount();
+    const baltatharAccount = this.helper.account.baltatharAccount();
+    const dorothyAccount = this.helper.account.dorothyAccount();
+
+    const councilVotingThreshold = 2;
+    const technicalCommitteeThreshold = 2;
+    const fastTrackVotingPeriod = 3;
+    const fastTrackDelayPeriod = 0;
+
+    console.log(`[democracy] executing '${proposalDesciption}' proposal`);
+
+    // >>> Propose external motion through council >>>
+    console.log('\t* Propose external motion through council.......');
+    const externalMotion = this.helper.democracy.externalProposeMajority({Inline: encodedProposal});
+    const encodedMotion = externalMotion?.method.toHex() || '';
+    const motionHash = blake2AsHex(encodedMotion);
+    console.log('\t* Motion hash is %s', motionHash);
+
+    await this.helper.collective.council.propose(
+      baltatharAccount,
+      councilVotingThreshold,
+      externalMotion,
+      externalMotion.encodedLength,
+    );
+
+    const councilProposalIdx = await this.helper.collective.council.proposalCount() - 1;
+    await this.helper.collective.council.vote(dorothyAccount, motionHash, councilProposalIdx, true);
+    await this.helper.collective.council.vote(baltatharAccount, motionHash, councilProposalIdx, true);
+
+    await this.helper.collective.council.close(
+      dorothyAccount,
+      motionHash,
+      councilProposalIdx,
+      {
+        refTime: 1_000_000_000,
+        proofSize: 1_000_000,
+      },
+      externalMotion.encodedLength,
+    );
+    console.log('\t* Propose external motion through council.......DONE');
+    // <<< Propose external motion through council <<<
+
+    // >>> Fast track proposal through technical committee >>>
+    console.log('\t* Fast track proposal through technical committee.......');
+    const fastTrack = this.helper.democracy.fastTrack(proposalHash, fastTrackVotingPeriod, fastTrackDelayPeriod);
+    const encodedFastTrack = fastTrack?.method.toHex() || '';
+    const fastTrackHash = blake2AsHex(encodedFastTrack);
+    console.log('\t* FastTrack hash is %s', fastTrackHash);
+
+    await this.helper.collective.techCommittee.propose(alithAccount, technicalCommitteeThreshold, fastTrack, fastTrack.encodedLength);
+
+    const techProposalIdx = await this.helper.collective.techCommittee.proposalCount() - 1;
+    await this.helper.collective.techCommittee.vote(baltatharAccount, fastTrackHash, techProposalIdx, true);
+    await this.helper.collective.techCommittee.vote(alithAccount, fastTrackHash, techProposalIdx, true);
+
+    await this.helper.collective.techCommittee.close(
+      baltatharAccount,
+      fastTrackHash,
+      techProposalIdx,
+      {
+        refTime: 1_000_000_000,
+        proofSize: 1_000_000,
+      },
+      fastTrack.encodedLength,
+    );
+    console.log('\t* Fast track proposal through technical committee.......DONE');
+    // <<< Fast track proposal through technical committee <<<
+
+    const democracyStarted = await this.helper.wait.expectEvent(3, Event.Democracy.Started);
+    const referendumIndex = democracyStarted.referendumIndex;
+
+    // >>> Referendum voting >>>
+    console.log(`\t* Referendum #${referendumIndex} voting.......`);
+    await this.helper.democracy.referendumVote(dorothyAccount, referendumIndex, {
+      balance: 10_000_000_000_000_000_000n,
+      vote: {aye: true, conviction: 1},
+    });
+    console.log(`\t* Referendum #${referendumIndex} voting.......DONE`);
+    // <<< Referendum voting <<<
+
+    // Wait the proposal to pass
+    await this.helper.wait.expectEvent(3, Event.Democracy.Passed, event => event.referendumIndex == referendumIndex);
+
+    await this.helper.wait.newBlocks(1);
+
+    console.log(`[democracy] executing '${proposalDesciption}' proposal.......DONE`);
+  }
+}
+
+class HydraFastDemocracyGroup {
+  helper: DevHydraDxHelper;
+
+  constructor(helper: DevHydraDxHelper) {
+    this.helper = helper;
+  }
+
+  async executeProposal(proposalDesciption: string, encodedProposal: string) {
+    const proposalHash = blake2AsHex(encodedProposal);
+    const aliceAccount = this.helper.util.fromSeed('//Alice');
+    const bobAccount = this.helper.util.fromSeed('//Bob');
+    const eveAccount = this.helper.util.fromSeed('//Eve');
+
+    const councilVotingThreshold = 1;
+    const technicalCommitteeThreshold = 3;
+    const fastTrackVotingPeriod = 3;
+    const fastTrackDelayPeriod = 0;
+
+    console.log(`[democracy] executing '${proposalDesciption}' proposal`);
+
+    // >>> Propose external motion through council >>>
+    console.log('\t* Propose external motion through council.......');
+    const externalMotion = this.helper.democracy.externalProposeMajority({Inline: encodedProposal});
+    const encodedMotion = externalMotion?.method.toHex() || '';
+    const motionHash = blake2AsHex(encodedMotion);
+    console.log('\t* Motion hash is %s', motionHash);
+
+    await this.helper.collective.council.propose(
+      aliceAccount,
+      councilVotingThreshold,
+      externalMotion,
+      externalMotion.encodedLength,
+    );
+
+    console.log('\t* Propose external motion through council.......DONE');
+    // <<< Propose external motion through council <<<
+
+    // >>> Fast track proposal through technical committee >>>
+    console.log('\t* Fast track proposal through technical committee.......');
+    const fastTrack = this.helper.democracy.fastTrack(proposalHash, fastTrackVotingPeriod, fastTrackDelayPeriod);
+    const encodedFastTrack = fastTrack?.method.toHex() || '';
+    const fastTrackHash = blake2AsHex(encodedFastTrack);
+    console.log('\t* FastTrack hash is %s', fastTrackHash);
+
+    await this.helper.collective.techCommittee.propose(aliceAccount, technicalCommitteeThreshold, fastTrack, fastTrack.encodedLength);
+
+    const techProposalIdx = await this.helper.collective.techCommittee.proposalCount() - 1;
+    await this.helper.collective.techCommittee.vote(aliceAccount, fastTrackHash, techProposalIdx, true);
+    await this.helper.collective.techCommittee.vote(bobAccount, fastTrackHash, techProposalIdx, true);
+    await this.helper.collective.techCommittee.vote(eveAccount, fastTrackHash, techProposalIdx, true);
+
+    await this.helper.collective.techCommittee.close(
+      bobAccount,
+      fastTrackHash,
+      techProposalIdx,
+      {
+        refTime: 1_000_000_000,
+        proofSize: 1_000_000,
+      },
+      fastTrack.encodedLength,
+    );
+    console.log('\t* Fast track proposal through technical committee.......DONE');
+    // <<< Fast track proposal through technical committee <<<
+
+    const democracyStarted = await this.helper.wait.expectEvent(3, Event.Democracy.Started);
+    const referendumIndex = democracyStarted.referendumIndex;
+
+    // >>> Referendum voting >>>
+    console.log(`\t* Referendum #${referendumIndex} voting.......`);
+    await this.helper.democracy.referendumVote(eveAccount, referendumIndex, {
+      balance: 10_000_000_000_000_000_000n,
+      vote: {aye: true, conviction: 1},
+    });
+    console.log(`\t* Referendum #${referendumIndex} voting.......DONE`);
+    // <<< Referendum voting <<<
+
+    // Wait the proposal to pass
+    await this.helper.wait.expectEvent(3, Event.Democracy.Passed, event => event.referendumIndex == referendumIndex);
+
+    await this.helper.wait.newBlocks(1);
+
+    console.log(`[democracy] executing '${proposalDesciption}' proposal.......DONE`);
+  }
+}
+
+class WaitGroup {
+  helper: ChainHelperBase;
+
+  constructor(helper: ChainHelperBase) {
+    this.helper = helper;
+  }
+
+  sleep(milliseconds: number) {
+    return new Promise((resolve) => setTimeout(resolve, milliseconds));
+  }
+
+  private async waitWithTimeout(promise: Promise<any>, timeout: number) {
+    let isBlock = false;
+    promise.then(() => isBlock = true).catch(() => isBlock = true);
+    let totalTime = 0;
+    const step = 100;
+    while(!isBlock) {
+      await this.sleep(step);
+      totalTime += step;
+      if(totalTime >= timeout) throw Error('Blocks production failed');
+    }
+    return promise;
+  }
+
+  /**
+   * Launch some async operation, or throw an error after some time. Note that it will still continue executing after the timeout.
+   * @param promise async operation to race against the timeout
+   * @param timeoutMS time after which to time out
+   * @param timeoutError error message to throw
+   * @returns promise of the same type the operation had
+   */
+  withTimeout<T>(
+    promise: Promise<T>,
+    timeoutMS = 30000,
+    timeoutError = 'The operation has timed out!',
+  ): Promise<T> {
+    const timeout = new Promise<never>((_, reject) => {
+      setTimeout(() => {
+        reject(new Error(timeoutError));
+      }, timeoutMS);
+    });
+
+    return Promise.race<T>([promise, timeout]).catch(e => {throw new Error(e);});
+  }
+
+  /**
+   * Wait for specified number of blocks
+   * @param blocksCount number of blocks to wait
+   * @returns
+   */
+  async newBlocks(blocksCount = 1, timeout?: number): Promise<void> {
+    timeout = timeout ?? blocksCount * 60_000;
+    // eslint-disable-next-line no-async-promise-executor
+    const promise = new Promise<void>(async (resolve) => {
+      const unsubscribe = await this.helper.getApi().rpc.chain.subscribeNewHeads(() => {
+        if(blocksCount > 0) {
+          blocksCount--;
+        } else {
+          unsubscribe();
+          resolve();
+        }
+      });
+    });
+    await this.waitWithTimeout(promise, timeout);
+    return promise;
+  }
+
+  /**
+   * Wait for the specified number of sessions to pass.
+   * Only applicable if the Session pallet is turned on.
+   * @param sessionCount number of sessions to wait
+   * @param blockTimeout time in ms until panicking that the chain has stopped producing blocks
+   * @returns
+   */
+  async newSessions(sessionCount = 1, blockTimeout = 60000): Promise<void> {
+    console.log(`Waiting for ${sessionCount} new session${sessionCount > 1 ? 's' : ''}.`
+      + ' This might take a while -- check SessionPeriod in pallet_session::Config for session time.');
+
+    const expectedSessionIndex = await (this.helper as DevUniqueHelper).session.getIndex() + sessionCount;
+    let currentSessionIndex = -1;
+
+    while(currentSessionIndex < expectedSessionIndex) {
+      // eslint-disable-next-line no-async-promise-executor
+      currentSessionIndex = await this.withTimeout(new Promise(async (resolve) => {
+        await this.newBlocks(1);
+        const res = await (this.helper as DevUniqueHelper).session.getIndex();
+        resolve(res);
+      }), blockTimeout, 'The chain has stopped producing blocks!');
+    }
+  }
+
+  async forParachainBlockNumber(blockNumber: bigint | number, timeout?: number) {
+    timeout = timeout ?? 30 * 60 * 1000;
+    // eslint-disable-next-line no-async-promise-executor
+    const promise = new Promise<void>(async (resolve) => {
+      const unsubscribe = await this.helper.getApi().rpc.chain.subscribeNewHeads((data: any) => {
+        if(data.number.toNumber() >= blockNumber) {
+          unsubscribe();
+          resolve();
+        }
+      });
+    });
+    await this.waitWithTimeout(promise, timeout);
+    return promise;
+  }
+
+  async forRelayBlockNumber(blockNumber: bigint | number, timeout?: number) {
+    timeout = timeout ?? 30 * 60 * 1000;
+    // eslint-disable-next-line no-async-promise-executor
+    const promise = new Promise<void>(async (resolve) => {
+      const unsubscribe = await this.helper.getApi().query.parachainSystem.validationData((data: any) => {
+        if(data.value.relayParentNumber.toNumber() >= blockNumber) {
+          // @ts-ignore
+          unsubscribe();
+          resolve();
+        }
+      });
+    });
+    await this.waitWithTimeout(promise, timeout);
+    return promise;
+  }
+
+  noScheduledTasks() {
+    const api = this.helper.getApi();
+
+    // eslint-disable-next-line no-async-promise-executor
+    const promise = new Promise<void>(async resolve => {
+      const unsubscribe = await api.rpc.chain.subscribeNewHeads(async () => {
+        const areThereScheduledTasks = await api.query.scheduler.lookup.entries();
+
+        if(areThereScheduledTasks.length == 0) {
+          unsubscribe();
+          resolve();
+        }
+      });
+    });
+
+    return promise;
+  }
+
+  parachainBlockMultiplesOf(val: bigint) {
+    // eslint-disable-next-line no-async-promise-executor
+    const promise = new Promise<void>(async resolve => {
+      const unsubscribe = await this.helper.getApi().rpc.chain.subscribeNewHeads((data: any) => {
+        if(data.number.toBigInt() % val == 0n) {
+          console.log(`from waiter: ${data.number.toBigInt()}`);
+          unsubscribe();
+          resolve();
+        }
+      });
+    });
+    return promise;
+  }
+
+  event<T extends IEventHelper>(
+    maxBlocksToWait: number,
+    eventHelper: T,
+    filter: (_: any) => boolean = () => true,
+  ): any {
+    // eslint-disable-next-line no-async-promise-executor
+    const promise = new Promise<T | null>(async (resolve) => {
+      const unsubscribe = await this.helper.getApi().rpc.chain.subscribeNewHeads(async header => {
+        const blockNumber = header.number.toJSON();
+        const blockHash = header.hash;
+        const eventIdStr = `${eventHelper.section()}.${eventHelper.method()}`;
+        const waitLimitStr = `wait blocks remaining: ${maxBlocksToWait}`;
+
+        this.helper.logger.log(`[Block #${blockNumber}] Waiting for event \`${eventIdStr}\` (${waitLimitStr})`);
+
+        const apiAt = await this.helper.getApi().at(blockHash);
+        const eventRecords = (await apiAt.query.system.events()) as any;
+
+        const neededEvent = eventRecords.toArray()
+          .filter((r: FrameSystemEventRecord) => r.event.section == eventHelper.section() && r.event.method == eventHelper.method())
+          .map((r: FrameSystemEventRecord) => eventHelper.wrapEvent(r.event.data))
+          .find(filter);
+
+        if(neededEvent) {
+          unsubscribe();
+          resolve(neededEvent);
+        } else if(maxBlocksToWait > 0) {
+          maxBlocksToWait--;
+        } else {
+          this.helper.logger.log(`Eligible event \`${eventIdStr}\` is NOT found.
+          The wait lasted until block ${blockNumber} inclusive`);
+          unsubscribe();
+          resolve(null);
+        }
+      });
+    });
+    return promise;
+  }
+
+  async expectEvent<T extends IEventHelper>(
+    maxBlocksToWait: number,
+    eventHelper: T,
+    filter: (e: any) => boolean = () => true,
+  ) {
+    const e = await this.event(maxBlocksToWait, eventHelper, filter);
+    if(e == null) {
+      throw Error(`The event '${eventHelper.section()}.${eventHelper.method()}' is expected`);
+    } else {
+      return e;
+    }
+  }
+}
+
+class SessionGroup {
+  helper: ChainHelperBase;
+
+  constructor(helper: ChainHelperBase) {
+    this.helper = helper;
+  }
+
+  //todo:collator documentation
+  async getIndex(): Promise<number> {
+    return (await this.helper.callRpc('api.query.session.currentIndex', [])).toNumber();
+  }
+
+  newSessions(sessionCount = 1, blockTimeout = 24000): Promise<void> {
+    return (this.helper as DevUniqueHelper).wait.newSessions(sessionCount, blockTimeout);
+  }
+
+  setOwnKeys(signer: TSigner, key: string) {
+    return this.helper.executeExtrinsic(
+      signer,
+      'api.tx.session.setKeys',
+      [key, '0x0'],
+      true,
+    );
+  }
+
+  setOwnKeysFromAddress(signer: TSigner) {
+    return this.setOwnKeys(signer, '0x' + Buffer.from(signer.addressRaw).toString('hex'));
+  }
+}
+
+class TestUtilGroup {
+  helper: DevUniqueHelper;
+
+  constructor(helper: DevUniqueHelper) {
+    this.helper = helper;
+  }
+
+  async enable(testUtilsPalletName: string) {
+    if(this.helper.fetchMissingPalletNames([testUtilsPalletName]).length != 0) {
+      return;
+    }
+
+    const signer = this.helper.util.fromSeed('//Alice');
+    await this.helper.getSudo<DevUniqueHelper>().executeExtrinsic(signer, 'api.tx.testUtils.enable', [], true);
+  }
+
+  async setTestValue(signer: TSigner, testVal: number) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.testUtils.setTestValue', [testVal], true);
+  }
+
+  async incTestValue(signer: TSigner) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.testUtils.incTestValue', [], true);
+  }
+
+  async setTestValueAndRollback(signer: TSigner, testVal: number) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.testUtils.setTestValueAndRollback', [testVal], true);
+  }
+
+  async testValue(blockIdx?: number) {
+    const api = blockIdx
+      ? await this.helper.getApi().at(await this.helper.callRpc('api.rpc.chain.getBlockHash', [blockIdx]))
+      : this.helper.getApi();
+
+    return (await api.query.testUtils.testValue()).toJSON();
+  }
+
+  async justTakeFee(signer: TSigner) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.testUtils.justTakeFee', [], true);
+  }
+
+  async selfCancelingInc(signer: TSigner, scheduledId: string, maxTestVal: number) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.testUtils.selfCancelingInc', [scheduledId, maxTestVal], true);
+  }
+}
+
+class EventCapture {
+  helper: DevUniqueHelper;
+  eventSection: string;
+  eventMethod: string;
+  events: EventRecord[] = [];
+  unsubscribe: VoidFn | null = null;
+
+  constructor(
+    helper: DevUniqueHelper,
+    eventSection: string,
+    eventMethod: string,
+  ) {
+    this.helper = helper;
+    this.eventSection = eventSection;
+    this.eventMethod = eventMethod;
+  }
+
+  async startCapture() {
+    this.stopCapture();
+    this.unsubscribe = (await this.helper.getApi().query.system.events((eventRecords: FrameSystemEventRecord[]) => {
+      const newEvents = eventRecords.filter(r => r.event.section == this.eventSection && r.event.method == this.eventMethod);
+
+      this.events.push(...newEvents);
+    })) as any;
+  }
+
+  stopCapture() {
+    if(this.unsubscribe !== null) {
+      this.unsubscribe();
+    }
+  }
+
+  extractCapturedEvents() {
+    return this.events;
+  }
+}
+
+class AdminGroup {
+  helper: UniqueHelper;
+
+  constructor(helper: UniqueHelper) {
+    this.helper = helper;
+  }
+
+  async payoutStakers(signer: IKeyringPair, stakersToPayout: number):  Promise<{staker: string, stake: bigint, payout: bigint}[]> {
+    const payoutResult = await this.helper.executeExtrinsic(signer, 'api.tx.appPromotion.payoutStakers', [stakersToPayout], true);
+    return payoutResult.result.events.filter(e => e.event.method === 'StakingRecalculation').map(e => ({
+      staker: e.event.data[0].toString(),
+      stake: e.event.data[1].toBigInt(),
+      payout: e.event.data[2].toBigInt(),
+    }));
+  }
+}
+
+// eslint-disable-next-line @typescript-eslint/naming-convention
+function ScheduledUniqueHelper<T extends UniqueHelperConstructor>(Base: T) {
+  return class extends Base {
+    scheduleFn: 'schedule' | 'scheduleAfter';
+    blocksNum: number;
+    options: ISchedulerOptions;
+
+    constructor(...args: any[]) {
+      const logger = args[0] as ILogger;
+      const options = args[1] as {
+        scheduleFn: 'schedule' | 'scheduleAfter',
+        blocksNum: number,
+        options: ISchedulerOptions
+      };
+
+      super(logger);
+
+      this.scheduleFn = options.scheduleFn;
+      this.blocksNum = options.blocksNum;
+      this.options = options.options;
+    }
+
+    override executeExtrinsic(sender: IKeyringPair, scheduledExtrinsic: string, scheduledParams: any[], expectSuccess?: boolean): Promise<ITransactionResult> {
+      const scheduledTx = this.constructApiCall(scheduledExtrinsic, scheduledParams);
+
+      const mandatorySchedArgs = [
+        this.blocksNum,
+        this.options.periodic ? [this.options.periodic.period, this.options.periodic.repetitions] : null,
+        this.options.priority ?? null,
+        scheduledTx,
+      ];
+
+      let schedArgs;
+      let scheduleFn;
+
+      if(this.options.scheduledId) {
+        schedArgs = [this.options.scheduledId!, ...mandatorySchedArgs];
+
+        if(this.scheduleFn == 'schedule') {
+          scheduleFn = 'scheduleNamed';
+        } else if(this.scheduleFn == 'scheduleAfter') {
+          scheduleFn = 'scheduleNamedAfter';
+        }
+      } else {
+        schedArgs = mandatorySchedArgs;
+        scheduleFn = this.scheduleFn;
+      }
+
+      const extrinsic = 'api.tx.scheduler.' + scheduleFn;
+
+      return super.executeExtrinsic(
+        sender,
+        extrinsic as any,
+        schedArgs,
+        expectSuccess,
+      );
+    }
+  };
+}

--- /dev/null
+++ b/js-packages/test-utils/package.json
@@ -0,0 +1,18 @@
+{
+  "author": "",
+  "license": "SEE LICENSE IN ../../../LICENSE",
+  "description": "Playground scripts",
+  "engines": {
+    "node": ">=16"
+  },
+  "name": "@unique/test-utils",
+  "type": "module",
+  "version": "1.0.0",
+  "main": "index.js",
+  "dependencies": {
+    "@polkadot/api": "10.10.1",
+    "@polkadot/util": "^12.5.1",
+    "@polkadot/util-crypto": "^12.5.1",
+    "@unique-nft/opal-testnet-types": "workspace:*"
+  }
+}

--- /dev/null
+++ b/js-packages/test-utils/util.ts
@@ -0,0 +1,223 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+import * as path from 'path';
+import * as crypto from 'crypto';
+import type {IKeyringPair} from '@polkadot/types/types/interfaces';
+import chai from 'chai';
+import chaiAsPromised from 'chai-as-promised';
+import chaiSubset from 'chai-subset';
+import {Context} from 'mocha';
+import config from '../tests/config.js';
+import {ChainHelperBase} from '@unique-nft/playgrounds/unique.js';
+import type {ILogger} from '@unique-nft/playgrounds/types.js';
+import {DevUniqueHelper, SilentLogger, SilentConsole, DevMoonbeamHelper, DevMoonriverHelper, DevAcalaHelper, DevKaruraHelper, DevRelayHelper, DevWestmintHelper, DevStatemineHelper, DevStatemintHelper, DevAstarHelper, DevShidenHelper, DevPolkadexHelper, DevHydraDxHelper} from '@unique/test-utils';
+import {dirname} from 'path';
+import {fileURLToPath} from 'url';
+
+chai.config.truncateThreshold = 0;
+chai.use(chaiAsPromised);
+chai.use(chaiSubset);
+export const expect = chai.expect;
+
+const getTestHash = (filename: string) => crypto.createHash('md5').update(filename).digest('hex');
+
+export const getTestSeed = (filename: string) => `//Alice+${getTestHash(filename)}`;
+
+async function usingPlaygroundsGeneral<T extends ChainHelperBase, R = void>(
+  helperType: new (logger: ILogger) => T,
+  url: string,
+  code: (helper: T, privateKey: (seed: string | { filename?: string, url?: string, ignoreFundsPresence?: boolean }) => Promise<IKeyringPair>) => Promise<R>,
+): Promise<R> {
+  const silentConsole = new SilentConsole();
+  silentConsole.enable();
+
+  const helper = new helperType(new SilentLogger());
+  let result;
+  try {
+    await helper.connect(url);
+    const ss58Format = helper.chain.getChainProperties().ss58Format;
+    const privateKey = async (seed: string | {filename?: string, url?: string, ignoreFundsPresence?: boolean}) => {
+      if(typeof seed === 'string') {
+        return helper.util.fromSeed(seed, ss58Format);
+      }
+      if(seed.url) {
+        const {filename} = makeNames(seed.url);
+        seed.filename = filename;
+      } else if(seed.filename) {
+        // Pass
+      } else {
+        throw new Error('no url nor filename set');
+      }
+      const actualSeed = getTestSeed(seed.filename);
+      let account = helper.util.fromSeed(actualSeed, ss58Format);
+      // here's to hoping that no
+      if(!seed.ignoreFundsPresence && ((helper as any)['balance'] == undefined || await (helper as any).balance.getSubstrate(account.address) < MINIMUM_DONOR_FUND)) {
+        console.warn(`${path.basename(seed.filename)}: Not enough funds present on the filename account. Using the default one as the donor instead.`);
+        account = helper.util.fromSeed('//Alice', ss58Format);
+      }
+      return account;
+    };
+    result = await code(helper, privateKey);
+  }
+  finally {
+    await helper.disconnect();
+    silentConsole.disable();
+  }
+  return result as any as R;
+}
+
+export const usingPlaygrounds = <R = void>(code: (helper: DevUniqueHelper, privateKey: (seed: string | {filename?: string, url?: string, ignoreFundsPresence?: boolean}) => Promise<IKeyringPair>) => Promise<R>, url: string = config.substrateUrl) => usingPlaygroundsGeneral<DevUniqueHelper, R>(DevUniqueHelper, url, code);
+
+export const usingWestmintPlaygrounds = (url: string, code: (helper: DevWestmintHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevWestmintHelper>(DevWestmintHelper, url, code);
+
+export const usingStateminePlaygrounds = (url: string, code: (helper: DevWestmintHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevStatemineHelper>(DevWestmintHelper, url, code);
+
+export const usingStatemintPlaygrounds = (url: string, code: (helper: DevWestmintHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevStatemintHelper>(DevWestmintHelper, url, code);
+
+export const usingRelayPlaygrounds = (url: string, code: (helper: DevRelayHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevRelayHelper>(DevRelayHelper, url, code);
+
+export const usingAcalaPlaygrounds = (url: string, code: (helper: DevAcalaHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevAcalaHelper>(DevAcalaHelper, url, code);
+
+export const usingKaruraPlaygrounds = (url: string, code: (helper: DevKaruraHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevKaruraHelper>(DevAcalaHelper, url, code);
+
+export const usingMoonbeamPlaygrounds = (url: string, code: (helper: DevMoonbeamHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevMoonbeamHelper>(DevMoonbeamHelper, url, code);
+
+export const usingMoonriverPlaygrounds = (url: string, code: (helper: DevMoonbeamHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevMoonriverHelper>(DevMoonriverHelper, url, code);
+
+export const usingAstarPlaygrounds = (url: string, code: (helper: DevAstarHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevAstarHelper>(DevAstarHelper, url, code);
+
+export const usingShidenPlaygrounds = (url: string, code: (helper: DevShidenHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevShidenHelper>(DevShidenHelper, url, code);
+
+export const usingPolkadexPlaygrounds = (url: string, code: (helper: DevPolkadexHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevPolkadexHelper>(DevPolkadexHelper, url, code);
+
+export const usingHydraDxPlaygrounds = (url: string, code: (helper: DevHydraDxHelper, privateKey: (seed: string) => Promise<IKeyringPair>) => Promise<void>) => usingPlaygroundsGeneral<DevHydraDxHelper>(DevHydraDxHelper, url, code);
+
+export const MINIMUM_DONOR_FUND = 4_000_000n;
+export const DONOR_FUNDING = 4_000_000n;
+
+// App-promotion periods:
+export const LOCKING_PERIOD = 12n; // 12 blocks of relay
+export const UNLOCKING_PERIOD = 6n; // 6 blocks of parachain
+
+// Native contracts
+export const COLLECTION_HELPER = '0x6c4e9fe1ae37a41e93cee429e8e1881abdcbb54f';
+export const CONTRACT_HELPER = '0x842899ECF380553E8a4de75bF534cdf6fBF64049';
+
+export enum Pallets {
+  Inflation = 'inflation',
+  ReFungible = 'refungible',
+  Fungible = 'fungible',
+  NFT = 'nonfungible',
+  Scheduler = 'scheduler',
+  UniqueScheduler = 'uniqueScheduler',
+  AppPromotion = 'apppromotion',
+  CollatorSelection = 'collatorselection',
+  Session = 'session',
+  Identity = 'identity',
+  Democracy = 'democracy',
+  Council = 'council',
+  //CouncilMembership = 'councilmembership',
+  TechnicalCommittee = 'technicalcommittee',
+  Fellowship = 'fellowshipcollective',
+  Preimage = 'preimage',
+  Maintenance = 'maintenance',
+  TestUtils = 'testutils',
+}
+
+export function requirePalletsOrSkip(test: Context, helper: DevUniqueHelper, requiredPallets: readonly string[]) {
+  const missingPallets = helper.fetchMissingPalletNames(requiredPallets);
+
+  if(missingPallets.length > 0) {
+    const skipMsg = `\tSkipping test '${test.test?.title}'.\n\tThe following pallets are missing:\n\t- ${missingPallets.join('\n\t- ')}`;
+    console.warn('\x1b[38:5:208m%s\x1b[0m', skipMsg);
+    test.skip();
+  }
+}
+
+export function itSub(name: string, cb: (apis: { helper: DevUniqueHelper, privateKey: (seed: string) => Promise<IKeyringPair> }) => any, opts: { only?: boolean, skip?: boolean, requiredPallets?: readonly string[] } = {}) {
+  (opts.only ? it.only :
+    opts.skip ? it.skip : it)(name, async function () {
+    await usingPlaygrounds(async (helper, privateKey) => {
+      if(opts.requiredPallets) {
+        requirePalletsOrSkip(this, helper, opts.requiredPallets);
+      }
+
+      await cb({helper, privateKey});
+    });
+  });
+}
+export function itSubIfWithPallet(name: string, required: readonly string[], cb: (apis: { helper: DevUniqueHelper, privateKey: (seed: string) => Promise<IKeyringPair> }) => any, opts: { only?: boolean, skip?: boolean, requiredPallets?: readonly string[] } = {}) {
+  return itSub(name, cb, {requiredPallets: required, ...opts});
+}
+itSub.only = (name: string, cb: (apis: { helper: DevUniqueHelper, privateKey: (seed: string) => Promise<IKeyringPair> }) => any) => itSub(name, cb, {only: true});
+itSub.skip = (name: string, cb: (apis: { helper: DevUniqueHelper, privateKey: (seed: string) => Promise<IKeyringPair> }) => any) => itSub(name, cb, {skip: true});
+
+itSubIfWithPallet.only = (name: string, required: readonly string[], cb: (apis: { helper: DevUniqueHelper, privateKey: (seed: string) => Promise<IKeyringPair> }) => any) => itSubIfWithPallet(name, required, cb, {only: true});
+itSubIfWithPallet.skip = (name: string, required: readonly string[], cb: (apis: { helper: DevUniqueHelper, privateKey: (seed: string) => Promise<IKeyringPair> }) => any) => itSubIfWithPallet(name, required, cb, {skip: true});
+itSub.ifWithPallets = itSubIfWithPallet;
+
+export type SchedKind = 'anon' | 'named';
+
+export function itSched(
+  name: string,
+  cb: (schedKind: SchedKind, apis: { helper: DevUniqueHelper, privateKey: (seed: string) => Promise<IKeyringPair> }) => any,
+  opts: { only?: boolean, skip?: boolean, requiredPallets?: string[] } = {},
+) {
+  itSub(name + ' (anonymous scheduling)', (apis) => cb('anon', apis), opts);
+  itSub(name + ' (named scheduling)', (apis) => cb('named', apis), opts);
+}
+itSched.only = (name: string, cb: (schedKind: SchedKind, apis: { helper: DevUniqueHelper, privateKey: (seed: string) => Promise<IKeyringPair> }) => any) => itSched(name, cb, {only: true});
+itSched.skip = (name: string, cb: (schedKind: SchedKind, apis: { helper: DevUniqueHelper, privateKey: (seed: string) => Promise<IKeyringPair> }) => any) => itSched(name, cb, {skip: true});
+itSched.ifWithPallets = itSchedIfWithPallets;
+
+function itSchedIfWithPallets(name: string, required: string[], cb: (schedKind: SchedKind, apis: { helper: DevUniqueHelper, privateKey: (seed: string) => Promise<IKeyringPair> }) => any, opts: { only?: boolean, skip?: boolean, requiredPallets?: string[] } = {}) {
+  return itSched(name, cb, {requiredPallets: required, ...opts});
+}
+
+export function describeXCM(title: string, fn: (this: Mocha.Suite) => void, opts: {skip?: boolean} = {}) {
+  (process.env.RUN_XCM_TESTS && !opts.skip
+    ? describe
+    : describe.skip)(title, fn);
+}
+
+describeXCM.skip = (name: string, fn: (this: Mocha.Suite) => void) => describeXCM(name, fn, {skip: true});
+
+export function describeGov(title: string, fn: (this: Mocha.Suite) => void, opts: {skip?: boolean} = {}) {
+  (process.env.RUN_GOV_TESTS && !opts.skip
+    ? describe
+    : describe.skip)(title, fn);
+}
+
+describeGov.skip = (name: string, fn: (this: Mocha.Suite) => void) => describeGov(name, fn, {skip: true});
+
+export function sizeOfInt(i: number) {
+  if(i < 0 || i > 0xffffffff) throw new Error('out of range');
+  if(i < 0b11_1111) {
+    return 1;
+  } else if(i < 0b11_1111_1111_1111) {
+    return 2;
+  } else if(i < 0b11_1111_1111_1111_1111_1111_1111_1111) {
+    return 4;
+  } else {
+    return 5;
+  }
+}
+
+const UTF8_ENCODER = new TextEncoder();
+export function sizeOfEncodedStr(v: string) {
+  const encoded = UTF8_ENCODER.encode(v);
+  return sizeOfInt(encoded.length) + encoded.length;
+}
+
+export function sizeOfProperty(prop: {key: string, value: string}) {
+  return sizeOfEncodedStr(prop.key) + sizeOfEncodedStr(prop.value);
+}
+
+export function makeNames(url: string) {
+  const filename = fileURLToPath(url);
+  return {
+    filename,
+    dirname: dirname(filename),
+  };
+}

--- /dev/null
+++ b/js-packages/test-utils/xcm/index.ts
@@ -0,0 +1,449 @@
+import {ApiPromise, WsProvider} from '@polkadot/api';
+import type {IKeyringPair} from '@polkadot/types/types';
+import {ChainHelperBase, EthereumBalanceGroup, HelperGroup, SubstrateBalanceGroup, UniqueHelper} from '@unique-nft/playgrounds/unique.js';
+import type {ILogger, TSigner} from '@unique-nft/playgrounds/types.js';
+import type {AcalaAssetMetadata, DemocracyStandardAccountVote, MoonbeamAssetInfo} from './types.js';
+
+
+export class XcmChainHelper extends ChainHelperBase {
+  override async connect(wsEndpoint: string, _listeners?: any): Promise<void> {
+    const wsProvider = new WsProvider(wsEndpoint);
+    this.api = new ApiPromise({
+      provider: wsProvider,
+    });
+    await this.api.isReadyOrError;
+    this.network = await UniqueHelper.detectNetwork(this.api);
+  }
+}
+
+class AcalaAssetRegistryGroup extends HelperGroup<AcalaHelper> {
+  async registerForeignAsset(signer: TSigner, destination: any, metadata: AcalaAssetMetadata) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.assetRegistry.registerForeignAsset', [destination, metadata], true);
+  }
+}
+
+class MoonbeamAssetManagerGroup extends HelperGroup<MoonbeamHelper> {
+  makeRegisterForeignAssetProposal(assetInfo: MoonbeamAssetInfo) {
+    const apiPrefix = 'api.tx.assetManager.';
+
+    const registerTx = this.helper.constructApiCall(
+      apiPrefix + 'registerForeignAsset',
+      [assetInfo.location, assetInfo.metadata, assetInfo.existentialDeposit, assetInfo.isSufficient],
+    );
+
+    const setUnitsTx = this.helper.constructApiCall(
+      apiPrefix + 'setAssetUnitsPerSecond',
+      [assetInfo.location, assetInfo.unitsPerSecond, assetInfo.numAssetsWeightHint],
+    );
+
+    const batchCall = this.helper.getApi().tx.utility.batchAll([registerTx, setUnitsTx]);
+    const encodedProposal = batchCall?.method.toHex() || '';
+    return encodedProposal;
+  }
+
+  async assetTypeId(location: any) {
+    return await this.helper.callRpc('api.query.assetManager.assetTypeId', [location]);
+  }
+}
+
+class MoonbeamDemocracyGroup extends HelperGroup<MoonbeamHelper> {
+  notePreimagePallet: string;
+
+  constructor(helper: MoonbeamHelper, options: { [key: string]: any } = {}) {
+    super(helper);
+    this.notePreimagePallet = options.notePreimagePallet;
+  }
+
+  async notePreimage(signer: TSigner, encodedProposal: string) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.notePreimagePallet}.notePreimage`, [encodedProposal], true);
+  }
+
+  externalProposeMajority(proposal: any) {
+    return this.helper.constructApiCall('api.tx.democracy.externalProposeMajority', [proposal]);
+  }
+
+  fastTrack(proposalHash: string, votingPeriod: number, delayPeriod: number) {
+    return this.helper.constructApiCall('api.tx.democracy.fastTrack', [proposalHash, votingPeriod, delayPeriod]);
+  }
+
+  async referendumVote(signer: TSigner, referendumIndex: number, accountVote: DemocracyStandardAccountVote) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.democracy.vote', [referendumIndex, {Standard: accountVote}], true);
+  }
+}
+
+class DemocracyGroup<T extends ChainHelperBase> extends HelperGroup<T> {
+  notePreimagePallet: string;
+
+  constructor(helper: T, options: { [key: string]: any } = {}) {
+    super(helper);
+    this.notePreimagePallet = options.notePreimagePallet;
+  }
+
+  async notePreimage(signer: TSigner, encodedProposal: string) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.notePreimagePallet}.notePreimage`, [encodedProposal], true);
+  }
+
+  externalProposeMajority(proposal: any) {
+    return this.helper.constructApiCall('api.tx.democracy.externalProposeMajority', [proposal]);
+  }
+
+  fastTrack(proposalHash: string, votingPeriod: number, delayPeriod: number) {
+    return this.helper.constructApiCall('api.tx.democracy.fastTrack', [proposalHash, votingPeriod, delayPeriod]);
+  }
+
+  async referendumVote(signer: TSigner, referendumIndex: number, accountVote: DemocracyStandardAccountVote) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.democracy.vote', [referendumIndex, {Standard: accountVote}], true);
+  }
+}
+
+class MoonbeamCollectiveGroup extends HelperGroup<MoonbeamHelper> {
+  collective: string;
+
+  constructor(helper: MoonbeamHelper, collective: string) {
+    super(helper);
+
+    this.collective = collective;
+  }
+
+  async propose(signer: TSigner, threshold: number, proposalHash: string, lengthBound: number) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.propose`, [threshold, proposalHash, lengthBound], true);
+  }
+
+  async vote(signer: TSigner, proposalHash: string, proposalIndex: number, approve: boolean) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.vote`, [proposalHash, proposalIndex, approve], true);
+  }
+
+  async close(signer: TSigner, proposalHash: string, proposalIndex: number, weightBound: any, lengthBound: number) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.close`, [proposalHash, proposalIndex, weightBound, lengthBound], true);
+  }
+
+  async proposalCount() {
+    return Number(await this.helper.callRpc(`api.query.${this.collective}.proposalCount`, []));
+  }
+}
+
+class CollectiveGroup<T extends ChainHelperBase> extends HelperGroup<T> {
+  collective: string;
+
+  constructor(helper: T, palletName: string) {
+    super(helper);
+
+    this.collective = palletName;
+  }
+
+  async propose(signer: TSigner, threshold: number, proposalHash: string, lengthBound: number) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.propose`, [threshold, proposalHash, lengthBound], true);
+  }
+
+  async vote(signer: TSigner, proposalHash: string, proposalIndex: number, approve: boolean) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.vote`, [proposalHash, proposalIndex, approve], true);
+  }
+
+  async close(signer: TSigner, proposalHash: string, proposalIndex: number, weightBound: any, lengthBound: number) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.collective}.close`, [proposalHash, proposalIndex, weightBound, lengthBound], true);
+  }
+
+  async proposalCount() {
+    return Number(await this.helper.callRpc(`api.query.${this.collective}.proposalCount`, []));
+  }
+}
+class PolkadexXcmHelperGroup<T extends ChainHelperBase> extends HelperGroup<T> {
+  async whitelistToken(signer: TSigner, assetId: any) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.xcmHelper.whitelistToken', [assetId], true);
+  }
+}
+
+export class ForeignAssetsGroup extends HelperGroup<UniqueHelper> {
+  async register(signer: TSigner, assetId: any, name: string, tokenPrefix: string, mode: 'NFT' | { Fungible: number }) {
+    await this.helper.executeExtrinsic(
+      signer,
+      'api.tx.foreignAssets.forceRegisterForeignAsset',
+      [{V3: assetId}, this.helper.util.str2vec(name), tokenPrefix, mode],
+      true,
+    );
+  }
+
+  async foreignCollectionId(assetId: any) {
+    return (await this.helper.callRpc('api.query.foreignAssets.foreignAssetToCollection', [assetId])).toJSON();
+  }
+}
+
+export class XcmGroup<T extends ChainHelperBase> extends HelperGroup<T> {
+  palletName: string;
+
+  constructor(helper: T, palletName: string) {
+    super(helper);
+
+    this.palletName = palletName;
+  }
+
+  async limitedReserveTransferAssets(signer: TSigner, destination: any, beneficiary: any, assets: any, feeAssetItem: number, weightLimit: any) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.palletName}.limitedReserveTransferAssets`, [destination, beneficiary, assets, feeAssetItem, weightLimit], true);
+  }
+
+  async setSafeXcmVersion(signer: TSigner, version: number) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.palletName}.forceDefaultXcmVersion`, [version], true);
+  }
+
+  async teleportAssets(signer: TSigner, destination: any, beneficiary: any, assets: any, feeAssetItem: number) {
+    await this.helper.executeExtrinsic(signer, `api.tx.${this.palletName}.teleportAssets`, [destination, beneficiary, assets, feeAssetItem], true);
+  }
+
+  async teleportNativeAsset(signer: TSigner, destinationParaId: number, targetAccount: Uint8Array, amount: bigint, xcmVersion = 3) {
+    const destinationContent = {
+      parents: 0,
+      interior: {
+        X1: {
+          Parachain: destinationParaId,
+        },
+      },
+    };
+
+    const beneficiaryContent = {
+      parents: 0,
+      interior: {
+        X1: {
+          AccountId32: {
+            network: 'Any',
+            id: targetAccount,
+          },
+        },
+      },
+    };
+
+    const assetsContent = [
+      {
+        id: {
+          Concrete: {
+            parents: 0,
+            interior: 'Here',
+          },
+        },
+        fun: {
+          Fungible: amount,
+        },
+      },
+    ];
+
+    let destination;
+    let beneficiary;
+    let assets;
+
+    if(xcmVersion == 2) {
+      destination = {V1: destinationContent};
+      beneficiary = {V1: beneficiaryContent};
+      assets = {V1: assetsContent};
+
+    } else if(xcmVersion == 3) {
+      destination = {V2: destinationContent};
+      beneficiary = {V2: beneficiaryContent};
+      assets = {V2: assetsContent};
+
+    } else {
+      throw Error('Unknown XCM version: ' + xcmVersion);
+    }
+
+    const feeAssetItem = 0;
+
+    await this.teleportAssets(signer, destination, beneficiary, assets, feeAssetItem);
+  }
+
+  async send(signer: IKeyringPair, destination: any, message: any) {
+    await this.helper.executeExtrinsic(
+      signer,
+      `api.tx.${this.palletName}.send`,
+      [
+        destination,
+        message,
+      ],
+      true,
+    );
+  }
+}
+
+export class XTokensGroup<T extends ChainHelperBase> extends HelperGroup<T> {
+  async transfer(signer: TSigner, currencyId: any, amount: bigint, destination: any, destWeight: any) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.xTokens.transfer', [currencyId, amount, destination, destWeight], true);
+  }
+
+  async transferMultiasset(signer: TSigner, asset: any, destination: any, destWeight: any) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.xTokens.transferMultiasset', [asset, destination, destWeight], true);
+  }
+
+  async transferMulticurrencies(signer: TSigner, currencies: any[], feeItem: number, destLocation: any, destWeight: any) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.xTokens.transferMulticurrencies', [currencies, feeItem, destLocation, destWeight], true);
+  }
+}
+
+
+
+export class TokensGroup<T extends ChainHelperBase> extends HelperGroup<T> {
+  async accounts(address: string, currencyId: any) {
+    const {free} = (await this.helper.callRpc('api.query.tokens.accounts', [address, currencyId])).toJSON() as any;
+    return BigInt(free);
+  }
+}
+
+export class AssetsGroup<T extends ChainHelperBase> extends HelperGroup<T> {
+  async create(signer: TSigner, assetId: number | bigint, admin: string, minimalBalance: bigint) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.assets.create', [assetId, admin, minimalBalance], true);
+  }
+
+  async forceCreate(signer: TSigner, assetId: number | bigint, admin: string, minimalBalance: bigint, isSufficient = true) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.assets.forceCreate', [assetId, admin, isSufficient, minimalBalance], true);
+  }
+
+  async setMetadata(signer: TSigner, assetId: number | bigint, name: string, symbol: string, decimals: number) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.assets.setMetadata', [assetId, name, symbol, decimals], true);
+  }
+
+  async mint(signer: TSigner, assetId: number | bigint, beneficiary: string, amount: bigint) {
+    await this.helper.executeExtrinsic(signer, 'api.tx.assets.mint', [assetId, beneficiary, amount], true);
+  }
+
+  async assetInfo(assetId: number | bigint) {
+    return (await this.helper.callRpc('api.query.assets.asset', [assetId])).toJSON();
+  }
+
+  async account(assetId: string | number | bigint, address: string) {
+    const accountAsset = (
+      await this.helper.callRpc('api.query.assets.account', [assetId, address])
+    ).toJSON()! as any;
+
+    if(accountAsset !== null) {
+      return BigInt(accountAsset['balance']);
+    } else {
+      return null;
+    }
+  }
+}
+
+export class RelayHelper extends XcmChainHelper {
+  balance: SubstrateBalanceGroup<RelayHelper>;
+  xcm: XcmGroup<RelayHelper>;
+
+  constructor(logger?: ILogger, options: { [key: string]: any } = {}) {
+    super(logger, options.helperBase ?? RelayHelper);
+
+    this.balance = new SubstrateBalanceGroup(this);
+    this.xcm = new XcmGroup(this, 'xcmPallet');
+  }
+}
+
+export class WestmintHelper extends XcmChainHelper {
+  balance: SubstrateBalanceGroup<WestmintHelper>;
+  xcm: XcmGroup<WestmintHelper>;
+  assets: AssetsGroup<WestmintHelper>;
+  xTokens: XTokensGroup<WestmintHelper>;
+
+  constructor(logger?: ILogger, options: { [key: string]: any } = {}) {
+    super(logger, options.helperBase ?? WestmintHelper);
+
+    this.balance = new SubstrateBalanceGroup(this);
+    this.xcm = new XcmGroup(this, 'polkadotXcm');
+    this.assets = new AssetsGroup(this);
+    this.xTokens = new XTokensGroup(this);
+  }
+}
+
+export class MoonbeamHelper extends XcmChainHelper {
+  balance: EthereumBalanceGroup<MoonbeamHelper>;
+  assetManager: MoonbeamAssetManagerGroup;
+  assets: AssetsGroup<MoonbeamHelper>;
+  xTokens: XTokensGroup<MoonbeamHelper>;
+  democracy: MoonbeamDemocracyGroup;
+  collective: {
+    council: MoonbeamCollectiveGroup,
+    techCommittee: MoonbeamCollectiveGroup,
+  };
+
+  constructor(logger?: ILogger, options: { [key: string]: any } = {}) {
+    super(logger, options.helperBase ?? MoonbeamHelper);
+
+    this.balance = new EthereumBalanceGroup(this);
+    this.assetManager = new MoonbeamAssetManagerGroup(this);
+    this.assets = new AssetsGroup(this);
+    this.xTokens = new XTokensGroup(this);
+    this.democracy = new MoonbeamDemocracyGroup(this, options);
+    this.collective = {
+      council: new MoonbeamCollectiveGroup(this, 'councilCollective'),
+      techCommittee: new MoonbeamCollectiveGroup(this, 'techCommitteeCollective'),
+    };
+  }
+}
+
+export class AstarHelper extends XcmChainHelper {
+  balance: SubstrateBalanceGroup<AstarHelper>;
+  assets: AssetsGroup<AstarHelper>;
+  xcm: XcmGroup<AstarHelper>;
+
+  constructor(logger?: ILogger, options: { [key: string]: any } = {}) {
+    super(logger, options.helperBase ?? AstarHelper);
+
+    this.balance = new SubstrateBalanceGroup(this);
+    this.assets = new AssetsGroup(this);
+    this.xcm = new XcmGroup(this, 'polkadotXcm');
+  }
+}
+
+export class AcalaHelper extends XcmChainHelper {
+  balance: SubstrateBalanceGroup<AcalaHelper>;
+  assetRegistry: AcalaAssetRegistryGroup;
+  xTokens: XTokensGroup<AcalaHelper>;
+  tokens: TokensGroup<AcalaHelper>;
+  xcm: XcmGroup<AcalaHelper>;
+
+  constructor(logger?: ILogger, options: { [key: string]: any } = {}) {
+    super(logger, options.helperBase ?? AcalaHelper);
+
+    this.balance = new SubstrateBalanceGroup(this);
+    this.assetRegistry = new AcalaAssetRegistryGroup(this);
+    this.xTokens = new XTokensGroup(this);
+    this.tokens = new TokensGroup(this);
+    this.xcm = new XcmGroup(this, 'polkadotXcm');
+  }
+}
+
+export class PolkadexHelper extends XcmChainHelper {
+  assets: AssetsGroup<PolkadexHelper>;
+  balance: SubstrateBalanceGroup<PolkadexHelper>;
+  xTokens: XTokensGroup<PolkadexHelper>;
+  xcm: XcmGroup<PolkadexHelper>;
+  xcmHelper: PolkadexXcmHelperGroup<PolkadexHelper>;
+
+  constructor(logger?: ILogger, options: { [key: string]: any } = {}) {
+    super(logger, options.helperBase ?? PolkadexHelper);
+
+    this.assets = new AssetsGroup(this);
+    this.balance = new SubstrateBalanceGroup(this);
+    this.xTokens = new XTokensGroup(this);
+    this.xcm = new XcmGroup(this, 'polkadotXcm');
+    this.xcmHelper = new PolkadexXcmHelperGroup(this);
+  }
+}
+
+export class HydraDxHelper extends XcmChainHelper {
+  balance: SubstrateBalanceGroup<HydraDxHelper>;
+  xcm: XcmGroup<HydraDxHelper>;
+  xTokens: XTokensGroup<HydraDxHelper>;
+  democracy: DemocracyGroup<HydraDxHelper>;
+  collective: {
+    council: CollectiveGroup<HydraDxHelper>,
+    techCommittee: CollectiveGroup<HydraDxHelper>,
+  };
+
+  constructor(logger?: ILogger, options: { [key: string]: any } = {}) {
+    super(logger, options.helperBase ?? HydraDxHelper);
+    options.notePreimagePallet = options.notePreimagePallet ?? 'preimage';
+
+    this.balance = new SubstrateBalanceGroup(this);
+    this.xcm = new XcmGroup(this, 'polkadotXcm');
+    this.xTokens = new XTokensGroup(this);
+    this.democracy = new DemocracyGroup(this, options);
+    this.collective = {
+      council: new CollectiveGroup(this, 'council'),
+      techCommittee: new CollectiveGroup(this, 'technicalCommittee'),
+    };
+  }
+}
+

--- /dev/null
+++ b/js-packages/test-utils/xcm/types.ts
@@ -0,0 +1,29 @@
+export interface AcalaAssetMetadata {
+  name: string,
+  symbol: string,
+  decimals: number,
+  minimalBalance: bigint,
+}
+
+export interface MoonbeamAssetInfo {
+  location: any,
+  metadata: {
+    name: string,
+    symbol: string,
+    decimals: number,
+    isFrozen: boolean,
+    minimalBalance: bigint,
+  },
+  existentialDeposit: bigint,
+  isSufficient: boolean,
+  unitsPerSecond: bigint,
+  numAssetsWeightHint: number,
+}
+
+export interface DemocracyStandardAccountVote {
+  balance: bigint,
+  vote: {
+    aye: boolean,
+    conviction: number,
+  },
+}