--- a/tests/package.json
+++ b/tests/package.json
@@ -100,7 +100,7 @@
     "testFT": "mocha --timeout 9999999 -r ts-node/register ./**/fungible.test.ts",
     "testEthFT": "mocha --timeout 9999999 -r ts-node/register ./**/eth/fungible.test.ts",
     "testRPC": "mocha --timeout 9999999 -r ts-node/register ./**/rpc.test.ts",
-    "testPromotion": "yarn setup && mocha --timeout 9999999 -r ts-node/register ./**/app-promotion.*test.ts",
+    "testPromotion": "yarn setup && mocha --timeout 9999999 -r ts-node/register ./**/appPromotion/*test.ts",
     "testXcmUnique": "RUN_XCM_TESTS=1 mocha --timeout 9999999 -r ts-node/register ./**/xcm/xcmUnique.test.ts",
     "testXcmQuartz": "RUN_XCM_TESTS=1 mocha --timeout 9999999 -r ts-node/register ./**/xcm/xcmQuartz.test.ts",
     "testXcmOpal": "RUN_XCM_TESTS=1 mocha --timeout 9999999 -r ts-node/register ./**/xcm/xcmOpal.test.ts",
--- a/tests/src/app-promotion.seqtest.ts
+++ /dev/null
@@ -1,82 +0,0 @@
-// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
-// This file is part of Unique Network.
-
-// Unique Network is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Unique Network is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
-
-import {IKeyringPair} from '@polkadot/types/types';
-import {itSub, usingPlaygrounds, Pallets, requirePalletsOrSkip} from './util';
-import {expect} from './eth/util';
-
-let superuser: IKeyringPair;
-let donor: IKeyringPair;
-let palletAdmin: IKeyringPair;
-
-describe('App promotion', () => {
-  before(async function () {
-    await usingPlaygrounds(async (helper, privateKey) => {
-      requirePalletsOrSkip(this, helper, [Pallets.AppPromotion]);
-      superuser = await privateKey('//Alice');
-      donor = await privateKey({filename: __filename});
-      palletAdmin = await privateKey('//PromotionAdmin');
-      const api = helper.getApi();
-      await helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})));
-    });
-  });
-
-  after(async function () {
-    await usingPlaygrounds(async (helper) => {
-      if (helper.fetchMissingPalletNames([Pallets.AppPromotion]).length != 0) return;
-      const api = helper.getApi();
-      await helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})));
-    });
-  });
-
-  describe('admin adress', () => {
-    itSub('can be set by sudo only', async ({helper}) => {
-      const api = helper.getApi();
-      const [nonAdmin] = await helper.arrange.createAccounts([10n], donor);
-      // nonAdmin can not set admin not from himself nor as a sudo
-      await expect(helper.signTransaction(nonAdmin, api.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address}))).to.be.rejected;
-      await expect(helper.signTransaction(nonAdmin, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address})))).to.be.rejected;
-    });
-
-    itSub('can be any valid CrossAccountId', async ({helper}) => {
-      // We are not going to set an eth address as a sponsor,
-      // but we do want to check, it doesn't break anything;
-      const api = helper.getApi();
-      const [account] = await helper.arrange.createAccounts([10n], donor);
-      const ethAccount = helper.address.substrateToEth(account.address);
-      // Alice sets Ethereum address as a sudo. Then Substrate address back...
-      await expect(helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Ethereum: ethAccount})))).to.be.fulfilled;
-      await expect(helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})))).to.be.fulfilled;
-
-      // ...It doesn't break anything;
-      const collection = await helper.nft.mintCollection(account, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
-      await expect(helper.signTransaction(account, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
-    });
-
-    itSub('can be reassigned', async ({helper}) => {
-      const api = helper.getApi();
-      const [oldAdmin, newAdmin, collectionOwner] = await helper.arrange.createAccounts([10n, 10n, 10n], donor);
-      const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
-
-      await expect(helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: oldAdmin.address})))).to.be.fulfilled;
-      await expect(helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: newAdmin.address})))).to.be.fulfilled;
-      await expect(helper.signTransaction(oldAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
-
-      await expect(helper.signTransaction(newAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
-    });
-  });
-});
-
--- a/tests/src/app-promotion.test.ts
+++ /dev/null
@@ -1,690 +0,0 @@
-// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
-// This file is part of Unique Network.
-
-// Unique Network is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Unique Network is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
-
-import {IKeyringPair} from '@polkadot/types/types';
-import {
-  itSub, usingPlaygrounds, Pallets, requirePalletsOrSkip, LOCKING_PERIOD, UNLOCKING_PERIOD,
-} from './util';
-import {DevUniqueHelper} from './util/playgrounds/unique.dev';
-import {itEth, expect, SponsoringMode} from './eth/util';
-
-let donor: IKeyringPair;
-let palletAdmin: IKeyringPair;
-let nominal: bigint;
-let palletAddress: string;
-let accounts: IKeyringPair[];
-// App promotion periods:
-// LOCKING_PERIOD = 12 blocks of relay
-// UNLOCKING_PERIOD = 6 blocks of parachain
-
-describe('App promotion', () => {
-  before(async function () {
-    await usingPlaygrounds(async (helper, privateKey) => {
-      requirePalletsOrSkip(this, helper, [Pallets.AppPromotion]);
-      donor = await privateKey({filename: __filename});
-      palletAddress = helper.arrange.calculatePalletAddress('appstake');
-      palletAdmin = await privateKey('//PromotionAdmin');
-      nominal = helper.balance.getOneTokenNominal();
-
-      const accountBalances = new Array(100);
-      accountBalances.fill(1000n);
-      accounts = await helper.arrange.createAccounts(accountBalances, donor); // create accounts-pool to speed up tests
-    });
-  });
-
-  describe('stake extrinsic', () => {
-    itSub('should "lock" staking balance, add it to "staked" map, and increase "totalStaked" amount', async ({helper}) => {
-      const [staker, recepient] = [accounts.pop()!, accounts.pop()!];
-      const totalStakedBefore = await helper.staking.getTotalStaked();
-
-      // Minimum stake amount is 100:
-      await expect(helper.staking.stake(staker, 100n * nominal - 1n)).to.be.rejected;
-      await helper.staking.stake(staker, 100n * nominal);
-
-      // Staker balance is: miscFrozen: 100, feeFrozen: 100, reserved: 0n...
-      // ...so he can not transfer 900
-      expect(await helper.balance.getSubstrateFull(staker.address)).to.contain({miscFrozen: 100n * nominal, feeFrozen: 100n * nominal, reserved: 0n});
-      expect(await helper.balance.getLocked(staker.address)).to.deep.eq([{id: 'appstake', amount: 100n * nominal, reasons: 'All'}]);
-      await expect(helper.balance.transferToSubstrate(staker, recepient.address, 900n * nominal)).to.be.rejectedWith('balances.LiquidityRestrictions');
-
-      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(100n * nominal);
-      expect(await helper.balance.getSubstrate(staker.address) / nominal).to.be.equal(999n);
-      // it is potentially flaky test. Promotion can credited some tokens. Maybe we need to use closeTo?
-      expect(await helper.staking.getTotalStaked()).to.be.equal(totalStakedBefore + 100n * nominal); // total tokens amount staked in app-promotion increased
-
-
-      await helper.staking.stake(staker, 200n * nominal);
-      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(300n * nominal);
-      const totalStakedPerBlock = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      expect(totalStakedPerBlock[0].amount).to.equal(100n * nominal);
-      expect(totalStakedPerBlock[1].amount).to.equal(200n * nominal);
-    });
-
-    itSub('should allow to create maximum 10 stakes for account', async ({helper}) => {
-      const [staker] = await helper.arrange.createAccounts([2000n], donor);
-      for (let i = 0; i < 10; i++) {
-        await helper.staking.stake(staker, 100n * nominal);
-      }
-
-      // can have 10 stakes
-      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(1000n * nominal);
-      expect(await helper.staking.getTotalStakedPerBlock({Substrate: staker.address})).to.have.length(10);
-
-      await expect(helper.staking.stake(staker, 100n * nominal)).to.be.rejectedWith('appPromotion.NoPermission');
-
-      // After unstake can stake again
-      await helper.staking.unstake(staker);
-      await helper.staking.stake(staker, 100n * nominal);
-      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.equal(100n * nominal);
-    });
-
-    itSub('should reject transaction if stake amount is more than total free balance minus frozen', async ({helper}) => {
-      const staker = accounts.pop()!;
-
-      // Can't stake full balance because Alice needs to pay some fee
-      await expect(helper.staking.stake(staker, 1000n * nominal)).to.be.rejected;
-      await helper.staking.stake(staker, 500n * nominal);
-
-      // Can't stake 500 tkn because Alice has Less than 500 transferable;
-      await expect(helper.staking.stake(staker, 500n * nominal)).to.be.rejectedWith('balances.LiquidityRestrictions');
-      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(500n * nominal);
-    });
-
-    itSub('for different accounts in one block is possible', async ({helper}) => {
-      const crowd = [accounts.pop()!, accounts.pop()!, accounts.pop()!, accounts.pop()!];
-
-      const crowdStartsToStake = crowd.map(user => helper.staking.stake(user, 100n * nominal));
-      await expect(Promise.all(crowdStartsToStake)).to.be.fulfilled;
-
-      const crowdStakes = await Promise.all(crowd.map(address => helper.staking.getTotalStaked({Substrate: address.address})));
-      expect(crowdStakes).to.deep.equal([100n * nominal, 100n * nominal, 100n * nominal, 100n * nominal]);
-    });
-  });
-
-  describe('unstake extrinsic', () => {
-    itSub('should change balance state from "frozen" to "reserved", add it to "pendingUnstake" map, and subtract it from totalStaked', async ({helper}) => {
-      const [staker, recepient] = [accounts.pop()!, accounts.pop()!];
-      const totalStakedBefore = await helper.staking.getTotalStaked();
-      await helper.staking.stake(staker, 900n * nominal);
-      await helper.staking.unstake(staker);
-
-      // Right after unstake balance is reserved
-      // Staker can not transfer
-      expect(await helper.balance.getSubstrateFull(staker.address)).to.deep.contain({reserved: 900n * nominal, miscFrozen: 0n, feeFrozen: 0n});
-      await expect(helper.balance.transferToSubstrate(staker, recepient.address, 100n * nominal)).to.be.rejectedWith('balances.InsufficientBalance');
-      expect(await helper.staking.getPendingUnstake({Substrate: staker.address})).to.be.equal(900n * nominal);
-      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(0n);
-      expect(await helper.staking.getTotalStaked()).to.be.equal(totalStakedBefore);
-    });
-
-    itSub('should unlock balance after unlocking period ends and remove it from "pendingUnstake"', async ({helper}) => {
-      const staker = accounts.pop()!;
-      await helper.staking.stake(staker, 100n * nominal);
-      await helper.staking.unstake(staker);
-      const [pendingUnstake] = await helper.staking.getPendingUnstakePerBlock({Substrate: staker.address});
-
-      // Wait for unstaking period. Balance now free ~1000; reserved, frozen, miscFrozeb: 0n
-      await helper.wait.forParachainBlockNumber(pendingUnstake.block);
-      expect(await helper.balance.getSubstrateFull(staker.address)).to.deep.contain({reserved: 0n, miscFrozen: 0n, feeFrozen: 0n});
-      expect(await helper.balance.getSubstrate(staker.address) / nominal).to.be.equal(999n);
-
-      // staker can transfer:
-      await helper.balance.transferToSubstrate(staker, donor.address, 998n * nominal);
-      expect(await helper.balance.getSubstrate(staker.address) / nominal).to.be.equal(1n);
-    });
-
-    itSub('should successfully unstake multiple stakes', async ({helper}) => {
-      const staker = accounts.pop()!;
-      await helper.staking.stake(staker, 100n * nominal);
-      await helper.staking.stake(staker, 200n * nominal);
-      await helper.staking.stake(staker, 300n * nominal);
-
-      // staked: [100, 200, 300]; unstaked: 0
-      let totalPendingUnstake = await helper.staking.getPendingUnstake({Substrate: staker.address});
-      let pendingUnstake = await helper.staking.getPendingUnstakePerBlock({Substrate: staker.address});
-      let stakes = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      expect(totalPendingUnstake).to.be.deep.equal(0n);
-      expect(pendingUnstake).to.be.deep.equal([]);
-      expect(stakes[0].amount).to.equal(100n * nominal);
-      expect(stakes[1].amount).to.equal(200n * nominal);
-      expect(stakes[2].amount).to.equal(300n * nominal);
-
-      // Can unstake multiple stakes
-      await helper.staking.unstake(staker);
-      pendingUnstake = await helper.staking.getPendingUnstakePerBlock({Substrate: staker.address});
-      totalPendingUnstake = await helper.staking.getPendingUnstake({Substrate: staker.address});
-      stakes = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      expect(totalPendingUnstake).to.be.equal(600n * nominal);
-      expect(stakes).to.be.deep.equal([]);
-      expect(pendingUnstake[0].amount).to.equal(600n * nominal);
-
-      expect (await helper.balance.getSubstrateFull(staker.address)).to.deep.contain({reserved: 600n * nominal, feeFrozen: 0n, miscFrozen: 0n});
-      await helper.wait.forParachainBlockNumber(pendingUnstake[0].block);
-      expect (await helper.balance.getSubstrateFull(staker.address)).to.deep.contain({reserved: 0n, feeFrozen: 0n, miscFrozen: 0n});
-      expect (await helper.balance.getSubstrate(staker.address) / nominal).to.be.equal(999n);
-    });
-
-    itSub('should not have any effects if no active stakes', async ({helper}) => {
-      const staker = accounts.pop()!;
-
-      // unstake has no effect if no stakes at all
-      await helper.staking.unstake(staker);
-      expect(await helper.staking.getPendingUnstake({Substrate: staker.address})).to.be.equal(0n);
-      expect(await helper.balance.getSubstrate(staker.address) / nominal).to.be.equal(999n); // TODO bigint closeTo helper
-
-      // TODO stake() unstake() waitUnstaked() unstake();
-
-      // can't unstake if there are only pendingUnstakes
-      await helper.staking.stake(staker, 100n * nominal);
-      await helper.staking.unstake(staker);
-      await helper.staking.unstake(staker);
-
-      expect(await helper.staking.getPendingUnstake({Substrate: staker.address})).to.be.equal(100n * nominal);
-      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(0n);
-    });
-
-    itSub('should keep different unlocking block for each unlocking stake', async ({helper}) => {
-      const staker = accounts.pop()!;
-      await helper.staking.stake(staker, 100n * nominal);
-      await helper.staking.unstake(staker);
-      await helper.staking.stake(staker, 120n * nominal);
-      await helper.staking.unstake(staker);
-
-      const unstakingPerBlock = await helper.staking.getPendingUnstakePerBlock({Substrate: staker.address});
-      expect(unstakingPerBlock).has.length(2);
-      expect(unstakingPerBlock[0].amount).to.equal(100n * nominal);
-      expect(unstakingPerBlock[1].amount).to.equal(120n * nominal);
-    });
-
-    itSub('should be possible for different accounts in one block', async ({helper}) => {
-      const stakers = [accounts.pop()!, accounts.pop()!, accounts.pop()!];
-
-      await Promise.all(stakers.map(staker => helper.staking.stake(staker, 100n * nominal)));
-      await Promise.all(stakers.map(staker => helper.staking.unstake(staker)));
-
-      await Promise.all(stakers.map(async (staker) => {
-        expect(await helper.staking.getPendingUnstake({Substrate: staker.address})).to.be.equal(100n * nominal);
-        expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(0n);
-      }));
-    });
-  });
-
-  describe('collection sponsoring', () => {
-    itSub('should actually sponsor transactions', async ({helper}) => {
-      const api = helper.getApi();
-      const [collectionOwner, tokenSender, receiver] = [accounts.pop()!, accounts.pop()!, accounts.pop()!];
-      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'Name', description: 'Description', tokenPrefix: 'Prefix', limits: {sponsorTransferTimeout: 0}});
-      const token = await collection.mintToken(collectionOwner, {Substrate: tokenSender.address});
-      await helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId));
-      const palletBalanceBefore = await helper.balance.getSubstrate(palletAddress);
-
-      await token.transfer(tokenSender, {Substrate: receiver.address});
-      expect (await token.getOwner()).to.be.deep.equal({Substrate: receiver.address});
-      const palletBalanceAfter = await helper.balance.getSubstrate(palletAddress);
-
-      // senders balance the same, transaction has sponsored
-      expect (await helper.balance.getSubstrate(tokenSender.address)).to.be.equal(1000n * nominal);
-      expect (palletBalanceBefore > palletBalanceAfter).to.be.true;
-    });
-
-    itSub('can not be set by non admin', async ({helper}) => {
-      const api = helper.getApi();
-      const [collectionOwner, nonAdmin] = [accounts.pop()!, accounts.pop()!];
-
-      const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
-
-      await expect(helper.signTransaction(nonAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
-      expect((await collection.getData())?.raw.sponsorship).to.equal('Disabled');
-    });
-
-    itSub('should set pallet address as confirmed admin', async ({helper}) => {
-      const api = helper.getApi();
-      const [collectionOwner, oldSponsor] = [accounts.pop()!, accounts.pop()!];
-
-      // Can set sponsoring for collection without sponsor
-      const collectionWithoutSponsor = await helper.nft.mintCollection(collectionOwner, {name: 'No-sponsor', description: 'New Collection', tokenPrefix: 'Promotion'});
-      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithoutSponsor.collectionId))).to.be.fulfilled;
-      expect((await collectionWithoutSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
-
-      // Can set sponsoring for collection with unconfirmed sponsor
-      const collectionWithUnconfirmedSponsor = await helper.nft.mintCollection(collectionOwner, {name: 'Unconfirmed', description: 'New Collection', tokenPrefix: 'Promotion', pendingSponsor: oldSponsor.address});
-      expect((await collectionWithUnconfirmedSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Unconfirmed: oldSponsor.address});
-      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithUnconfirmedSponsor.collectionId))).to.be.fulfilled;
-      expect((await collectionWithUnconfirmedSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
-
-      // Can set sponsoring for collection with confirmed sponsor
-      const collectionWithConfirmedSponsor = await helper.nft.mintCollection(collectionOwner, {name: 'Confirmed', description: 'New Collection', tokenPrefix: 'Promotion', pendingSponsor: oldSponsor.address});
-      await collectionWithConfirmedSponsor.confirmSponsorship(oldSponsor);
-      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithConfirmedSponsor.collectionId))).to.be.fulfilled;
-      expect((await collectionWithConfirmedSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
-    });
-
-    itSub('can be overwritten by collection owner', async ({helper}) => {
-      const api = helper.getApi();
-      const [collectionOwner, newSponsor] = [accounts.pop()!, accounts.pop()!];
-      const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
-      const collectionId = collection.collectionId;
-
-      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionId))).to.be.fulfilled;
-
-      // Collection limits still can be changed by the owner
-      expect(await collection.setLimits(collectionOwner, {sponsorTransferTimeout: 0})).to.be.true;
-      expect((await collection.getData())?.raw.limits.sponsorTransferTimeout).to.be.equal(0);
-      expect((await collection.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
-
-      // Collection sponsor can be changed too
-      expect((await collection.setSponsor(collectionOwner, newSponsor.address))).to.be.true;
-      expect((await collection.getData())?.raw.sponsorship).to.be.deep.equal({Unconfirmed: newSponsor.address});
-    });
-
-    itSub('should not overwrite collection limits set by the owner earlier', async ({helper}) => {
-      const api = helper.getApi();
-      const limits = {ownerCanDestroy: true, ownerCanTransfer: true, sponsorTransferTimeout: 0};
-      const collectionWithLimits = await helper.nft.mintCollection(accounts.pop()!, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', limits});
-
-      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithLimits.collectionId))).to.be.fulfilled;
-      expect((await collectionWithLimits.getData())?.raw.limits).to.be.deep.contain(limits);
-    });
-
-    itSub('should reject transaction if collection doesn\'t exist', async ({helper}) => {
-      const api = helper.getApi();
-      const collectionOwner = accounts.pop()!;
-
-      // collection has never existed
-      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(999999999))).to.be.rejected;
-      // collection has been burned
-      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
-      await collection.burn(collectionOwner);
-
-      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
-    });
-  });
-
-  describe('stopSponsoringCollection', () => {
-    itSub('can not be called by non-admin', async ({helper}) => {
-      const api = helper.getApi();
-      const [collectionOwner, nonAdmin] = [accounts.pop()!, accounts.pop()!];
-      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
-
-      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
-
-      await expect(helper.signTransaction(nonAdmin, api.tx.appPromotion.stopSponsoringCollection(collection.collectionId))).to.be.rejected;
-      expect((await collection.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
-    });
-
-    itSub('should set sponsoring as disabled', async ({helper}) => {
-      const api = helper.getApi();
-      const [collectionOwner, recepient] = [accounts.pop()!, accounts.pop()!];
-      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', limits: {sponsorTransferTimeout: 0}});
-      const token = await collection.mintToken(collectionOwner, {Substrate: collectionOwner.address});
-
-      await helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId));
-      await helper.signTransaction(palletAdmin, api.tx.appPromotion.stopSponsoringCollection(collection.collectionId));
-
-      expect((await collection.getData())?.raw.sponsorship).to.be.equal('Disabled');
-
-      // Transactions are not sponsored anymore:
-      const ownerBalanceBefore = await helper.balance.getSubstrate(collectionOwner.address);
-      await token.transfer(collectionOwner, {Substrate: recepient.address});
-      const ownerBalanceAfter = await helper.balance.getSubstrate(collectionOwner.address);
-      expect(ownerBalanceAfter < ownerBalanceBefore).to.be.equal(true);
-    });
-
-    itSub('should not affect collection which is not sponsored by pallete', async ({helper}) => {
-      const api = helper.getApi();
-      const collectionOwner = accounts.pop()!;
-      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', pendingSponsor: collectionOwner.address});
-      await collection.confirmSponsorship(collectionOwner);
-
-      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.stopSponsoringCollection(collection.collectionId))).to.be.rejected;
-
-      expect((await collection.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: collectionOwner.address});
-    });
-
-    itSub('should reject transaction if collection does not exist', async ({helper}) => {
-      const collectionOwner = accounts.pop()!;
-      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
-
-      await collection.burn(collectionOwner);
-      await expect(helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.stopSponsoringCollection', [collection.collectionId], true)).to.be.rejectedWith('common.CollectionNotFound');
-      await expect(helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.stopSponsoringCollection', [999_999_999], true)).to.be.rejectedWith('common.CollectionNotFound');
-    });
-  });
-
-  describe('contract sponsoring', () => {
-    itEth('should set palletes address as a sponsor', async ({helper}) => {
-      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
-      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
-      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
-
-      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address]);
-
-      expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.true;
-      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);
-      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
-        confirmed: {
-          substrate: palletAddress,
-        },
-      });
-    });
-
-    itEth('should overwrite sponsoring mode and existed sponsor', async ({helper}) => {
-      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
-      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
-      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
-
-      await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.fulfilled;
-
-      // Contract is self sponsored
-      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.be.deep.equal({
-        confirmed: {
-          ethereum: flipper.options.address.toLowerCase(),
-        },
-      });
-
-      // set promotion sponsoring
-      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true);
-
-      // new sponsor is pallet address
-      expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.true;
-      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);
-      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
-        confirmed: {
-          substrate: palletAddress,
-        },
-      });
-    });
-
-    itEth('can be overwritten by contract owner', async ({helper}) => {
-      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
-      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
-      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
-
-      // contract sponsored by pallet
-      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true);
-
-      // owner sets self sponsoring
-      await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.not.rejected;
-
-      expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.true;
-      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);
-      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
-        confirmed: {
-          ethereum: flipper.options.address.toLowerCase(),
-        },
-      });
-    });
-
-    itEth('can not be set by non admin', async ({helper}) => {
-      const nonAdmin = accounts.pop()!;
-      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
-      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
-      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
-
-      await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.fulfilled;
-
-      // nonAdmin calls sponsorContract
-      await expect(helper.executeExtrinsic(nonAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true)).to.be.rejectedWith('appPromotion.NoPermission');
-
-      // contract still self-sponsored
-      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
-        confirmed: {
-          ethereum: flipper.options.address.toLowerCase(),
-        },
-      });
-    });
-
-    itEth('should actually sponsor transactions', async ({helper}) => {
-      // Contract caller
-      const caller = await helper.eth.createAccountWithBalance(donor, 1000n);
-      const palletBalanceBefore = await helper.balance.getSubstrate(palletAddress);
-
-      // Deploy flipper
-      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
-      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
-      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
-
-      // Owner sets to sponsor every tx
-      await contractHelper.methods.setSponsoringRateLimit(flipper.options.address, 0).send({from: contractOwner});
-      await contractHelper.methods.setSponsoringMode(flipper.options.address, SponsoringMode.Generous).send({from: contractOwner});
-      await helper.eth.transferBalanceFromSubstrate(donor, flipper.options.address, 1000n); // transferBalanceToEth(api, alice, flipper.options.address, 1000n);
-
-      // Set promotion to the Flipper
-      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true);
-
-      // Caller calls Flipper
-      await flipper.methods.flip().send({from: caller});
-      expect(await flipper.methods.getValue().call()).to.be.true;
-
-      // The contracts and caller balances have not changed
-      const callerBalance = await helper.balance.getEthereum(caller);
-      const contractBalanceAfter = await helper.balance.getEthereum(flipper.options.address);
-      expect(callerBalance).to.be.equal(1000n * nominal);
-      expect(1000n * nominal === contractBalanceAfter).to.be.true;
-
-      // The pallet balance has decreased
-      const palletBalanceAfter = await helper.balance.getSubstrate(palletAddress);
-      expect(palletBalanceAfter < palletBalanceBefore).to.be.true;
-    });
-  });
-
-  describe('stopSponsoringContract', () => {
-    itEth('should remove pallet address from contract sponsors', async ({helper}) => {
-      const caller = await helper.eth.createAccountWithBalance(donor, 1000n);
-      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
-      const flipper = await helper.eth.deployFlipper(contractOwner);
-      await helper.eth.transferBalanceFromSubstrate(donor, flipper.options.address);
-      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
-
-      await contractHelper.methods.setSponsoringMode(flipper.options.address, SponsoringMode.Generous).send({from: contractOwner});
-      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true);
-      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.stopSponsoringContract', [flipper.options.address], true);
-
-      expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.false;
-      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);
-      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
-        disabled: null,
-      });
-
-      await flipper.methods.flip().send({from: caller});
-      expect(await flipper.methods.getValue().call()).to.be.true;
-
-      const callerBalance = await helper.balance.getEthereum(caller);
-      const contractBalanceAfter = await helper.balance.getEthereum(flipper.options.address);
-
-      // caller payed for call
-      expect(1000n * nominal > callerBalance).to.be.true;
-      expect(contractBalanceAfter).to.be.equal(100n * nominal);
-    });
-
-    itEth('can not be called by non-admin', async ({helper}) => {
-      const nonAdmin = accounts.pop()!;
-      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
-      const flipper = await helper.eth.deployFlipper(contractOwner);
-
-      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address]);
-      await expect(helper.executeExtrinsic(nonAdmin, 'api.tx.appPromotion.stopSponsoringContract', [flipper.options.address]))
-        .to.be.rejectedWith(/appPromotion\.NoPermission/);
-    });
-
-    itEth('should not affect a contract which is not sponsored by pallete', async ({helper}) => {
-      const nonAdmin = accounts.pop()!;
-      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
-      const flipper = await helper.eth.deployFlipper(contractOwner);
-      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
-      await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.fulfilled;
-
-      await expect(helper.executeExtrinsic(nonAdmin, 'api.tx.appPromotion.stopSponsoringContract', [flipper.options.address], true)).to.be.rejectedWith('appPromotion.NoPermission');
-    });
-  });
-
-  describe('payoutStakers', () => {
-    itSub('can not be called by non admin', async ({helper}) => {
-      const nonAdmin = accounts.pop()!;
-      await expect(helper.admin.payoutStakers(nonAdmin, 100)).to.be.rejectedWith('appPromotion.NoPermission');
-    });
-
-    itSub('should increase total staked', async ({helper}) => {
-      const staker = accounts.pop()!;
-      const totalStakedBefore = await helper.staking.getTotalStaked();
-      await helper.staking.stake(staker, 100n * nominal);
-
-      // Wait for rewards and pay
-      const [stakedInBlock] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stakedInBlock.block));
-      const totalPayout = (await helper.admin.payoutStakers(palletAdmin, 100)).reduce((prev, payout) => prev + payout.payout, 0n);
-
-      const totalStakedAfter = await helper.staking.getTotalStaked();
-      expect(totalStakedAfter).to.equal(totalStakedBefore + (100n * nominal) + totalPayout);
-      // staker can unstake
-      await helper.staking.unstake(staker);
-      expect(await helper.staking.getTotalStaked()).to.be.equal(totalStakedAfter - calculateIncome(100n * nominal));
-    });
-
-    itSub('should credit 0.05% for staking period', async ({helper}) => {
-      const staker = accounts.pop()!;
-
-      await waitPromotionPeriodDoesntEnd(helper);
-
-      await helper.staking.stake(staker, 100n * nominal);
-      await helper.staking.stake(staker, 200n * nominal);
-
-      // wait rewards are available:
-      const [_stake1, stake2] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stake2.block));
-
-      const payoutToStaker = (await helper.admin.payoutStakers(palletAdmin, 100)).find((payout) => payout.staker === staker.address)?.payout;
-      expect(payoutToStaker + 300n * nominal).to.equal(calculateIncome(300n * nominal));
-
-      const totalStakedPerBlock = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      const income1 = calculateIncome(100n * nominal);
-      const income2 = calculateIncome(200n * nominal);
-      expect(totalStakedPerBlock[0].amount).to.equal(income1);
-      expect(totalStakedPerBlock[1].amount).to.equal(income2);
-
-      const stakerBalance = await helper.balance.getSubstrateFull(staker.address);
-      expect(stakerBalance).to.contain({miscFrozen: income1 + income2, feeFrozen: income1 + income2, reserved: 0n});
-      expect(stakerBalance.free / nominal).to.eq(999n);
-    });
-
-    itSub('shoud be paid for more than one period if payments was missed', async ({helper}) => {
-      const staker = accounts.pop()!;
-
-      await helper.staking.stake(staker, 100n * nominal);
-      // wait for two rewards are available:
-      let [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stake.block) + LOCKING_PERIOD);
-
-      await helper.admin.payoutStakers(palletAdmin, 100);
-      [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      const frozenBalanceShouldBe = calculateIncome(100n * nominal, 2);
-      expect(stake.amount).to.be.equal(frozenBalanceShouldBe);
-
-      const stakerFullBalance = await helper.balance.getSubstrateFull(staker.address);
-
-      expect(stakerFullBalance).to.contain({reserved: 0n, feeFrozen: frozenBalanceShouldBe, miscFrozen: frozenBalanceShouldBe});
-    });
-
-    itSub('should not be credited for unstaked (reserved) balance', async ({helper}) => {
-      // staker unstakes before rewards has been payed
-      const staker = accounts.pop()!;
-      await helper.staking.stake(staker, 100n * nominal);
-      const [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stake.block) + LOCKING_PERIOD);
-      await helper.staking.unstake(staker);
-
-      // so he did not receive any rewards
-      const totalBalanceBefore = await helper.balance.getSubstrate(staker.address);
-      await helper.admin.payoutStakers(palletAdmin, 100);
-      const totalBalanceAfter = await helper.balance.getSubstrate(staker.address);
-
-      expect(totalBalanceBefore).to.be.equal(totalBalanceAfter);
-    });
-
-    itSub('should bring compound interest', async ({helper}) => {
-      const staker = accounts.pop()!;
-
-      await helper.staking.stake(staker, 100n * nominal);
-
-      let [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stake.block));
-
-      await helper.admin.payoutStakers(palletAdmin, 100);
-      [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      expect(stake.amount).to.equal(calculateIncome(100n * nominal));
-
-      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stake.block) + LOCKING_PERIOD);
-      await helper.admin.payoutStakers(palletAdmin, 100);
-      [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-      expect(stake.amount).to.equal(calculateIncome(100n * nominal, 2));
-    });
-
-    itSub.skip('can be paid 1000 rewards in a time', async ({helper}) => {
-      // all other stakes should be unstaked
-      const oneHundredStakers = await helper.arrange.createCrowd(100, 1050n, donor);
-
-      // stakers stakes 10 times each
-      for (let i = 0; i < 10; i++) {
-        await Promise.all(oneHundredStakers.map(staker => helper.staking.stake(staker, 100n * nominal)));
-      }
-      await helper.wait.newBlocks(40);
-      await helper.admin.payoutStakers(palletAdmin, 100);
-    });
-
-    itSub.skip('can handle 40.000 rewards', async ({helper}) => {
-      const crowdStakes = async () => {
-        // each account in the crowd stakes 2 times
-        const crowd = await helper.arrange.createCrowd(500, 300n, donor);
-        await Promise.all(crowd.map(account => helper.staking.stake(account, 100n * nominal)));
-        await Promise.all(crowd.map(account => helper.staking.stake(account, 100n * nominal)));
-        //
-      };
-
-      for (let i = 0; i < 40; i++) {
-        await crowdStakes();
-      }
-
-      // TODO pay rewards for some period
-    });
-  });
-});
-
-function calculateIncome(base: bigint, iter = 0, calcPeriod: bigint = UNLOCKING_PERIOD): bigint {
-  const DAY = 7200n;
-  const ACCURACY = 1_000_000_000n;
-  // 5n / 10_000n = 0.05% p/day
-  const income = base + base * (ACCURACY * (calcPeriod * 5n) / (10_000n * DAY)) / ACCURACY ;
-
-  if (iter > 1) {
-    return calculateIncome(income, iter - 1, calcPeriod);
-  } else return income;
-}
-
-function rewardAvailableInBlock(stakedInBlock: bigint) {
-  if (stakedInBlock % LOCKING_PERIOD === 0n) return stakedInBlock + LOCKING_PERIOD;
-  return (stakedInBlock - stakedInBlock % LOCKING_PERIOD) + (LOCKING_PERIOD * 2n);
-}
-
-// Wait while promotion period less than specified block, to avoid boundary cases
-// 0 if this should be the beginning of the period.
-async function waitPromotionPeriodDoesntEnd(helper: DevUniqueHelper, waitBlockLessThan = LOCKING_PERIOD / 3n) {
-  const relayBlockNumber = (await helper.callRpc('api.query.parachainSystem.validationData', [])).value.relayParentNumber.toNumber(); // await helper.chain.getLatestBlockNumber();
-  const currentPeriodBlock = BigInt(relayBlockNumber) % LOCKING_PERIOD;
-
-  if (currentPeriodBlock > waitBlockLessThan) {
-    await helper.wait.forRelayBlockNumber(BigInt(relayBlockNumber) + LOCKING_PERIOD - currentPeriodBlock);
-  }
-}
--- /dev/null
+++ b/tests/src/sub/appPromotion/appPromotion.seqtest.ts
@@ -0,0 +1,82 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+import {IKeyringPair} from '@polkadot/types/types';
+import {itSub, usingPlaygrounds, Pallets, requirePalletsOrSkip} from '../../util';
+import {expect} from '../../eth/util';
+
+let superuser: IKeyringPair;
+let donor: IKeyringPair;
+let palletAdmin: IKeyringPair;
+
+describe('App promotion', () => {
+  before(async function () {
+    await usingPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.AppPromotion]);
+      superuser = await privateKey('//Alice');
+      donor = await privateKey({filename: __filename});
+      palletAdmin = await privateKey('//PromotionAdmin');
+      const api = helper.getApi();
+      await helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})));
+    });
+  });
+
+  after(async function () {
+    await usingPlaygrounds(async (helper) => {
+      if (helper.fetchMissingPalletNames([Pallets.AppPromotion]).length != 0) return;
+      const api = helper.getApi();
+      await helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})));
+    });
+  });
+
+  describe('admin adress', () => {
+    itSub('can be set by sudo only', async ({helper}) => {
+      const api = helper.getApi();
+      const [nonAdmin] = await helper.arrange.createAccounts([10n], donor);
+      // nonAdmin can not set admin not from himself nor as a sudo
+      await expect(helper.signTransaction(nonAdmin, api.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address}))).to.be.rejected;
+      await expect(helper.signTransaction(nonAdmin, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address})))).to.be.rejected;
+    });
+
+    itSub('can be any valid CrossAccountId', async ({helper}) => {
+      // We are not going to set an eth address as a sponsor,
+      // but we do want to check, it doesn't break anything;
+      const api = helper.getApi();
+      const [account] = await helper.arrange.createAccounts([10n], donor);
+      const ethAccount = helper.address.substrateToEth(account.address);
+      // Alice sets Ethereum address as a sudo. Then Substrate address back...
+      await expect(helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Ethereum: ethAccount})))).to.be.fulfilled;
+      await expect(helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})))).to.be.fulfilled;
+
+      // ...It doesn't break anything;
+      const collection = await helper.nft.mintCollection(account, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
+      await expect(helper.signTransaction(account, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+    });
+
+    itSub('can be reassigned', async ({helper}) => {
+      const api = helper.getApi();
+      const [oldAdmin, newAdmin, collectionOwner] = await helper.arrange.createAccounts([10n, 10n, 10n], donor);
+      const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
+
+      await expect(helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: oldAdmin.address})))).to.be.fulfilled;
+      await expect(helper.signTransaction(superuser, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: newAdmin.address})))).to.be.fulfilled;
+      await expect(helper.signTransaction(oldAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+
+      await expect(helper.signTransaction(newAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
+    });
+  });
+});
+
--- /dev/null
+++ b/tests/src/sub/appPromotion/appPromotion.test.ts
@@ -0,0 +1,690 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+import {IKeyringPair} from '@polkadot/types/types';
+import {
+  itSub, usingPlaygrounds, Pallets, requirePalletsOrSkip, LOCKING_PERIOD, UNLOCKING_PERIOD,
+} from '../../util';
+import {DevUniqueHelper} from '../../util/playgrounds/unique.dev';
+import {itEth, expect, SponsoringMode} from '../../eth/util';
+
+let donor: IKeyringPair;
+let palletAdmin: IKeyringPair;
+let nominal: bigint;
+let palletAddress: string;
+let accounts: IKeyringPair[];
+// App promotion periods:
+// LOCKING_PERIOD = 12 blocks of relay
+// UNLOCKING_PERIOD = 6 blocks of parachain
+
+describe('App promotion', () => {
+  before(async function () {
+    await usingPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.AppPromotion]);
+      donor = await privateKey({filename: __filename});
+      palletAddress = helper.arrange.calculatePalletAddress('appstake');
+      palletAdmin = await privateKey('//PromotionAdmin');
+      nominal = helper.balance.getOneTokenNominal();
+
+      const accountBalances = new Array(100);
+      accountBalances.fill(1000n);
+      accounts = await helper.arrange.createAccounts(accountBalances, donor); // create accounts-pool to speed up tests
+    });
+  });
+
+  describe('stake extrinsic', () => {
+    itSub('should "lock" staking balance, add it to "staked" map, and increase "totalStaked" amount', async ({helper}) => {
+      const [staker, recepient] = [accounts.pop()!, accounts.pop()!];
+      const totalStakedBefore = await helper.staking.getTotalStaked();
+
+      // Minimum stake amount is 100:
+      await expect(helper.staking.stake(staker, 100n * nominal - 1n)).to.be.rejected;
+      await helper.staking.stake(staker, 100n * nominal);
+
+      // Staker balance is: miscFrozen: 100, feeFrozen: 100, reserved: 0n...
+      // ...so he can not transfer 900
+      expect(await helper.balance.getSubstrateFull(staker.address)).to.contain({miscFrozen: 100n * nominal, feeFrozen: 100n * nominal, reserved: 0n});
+      expect(await helper.balance.getLocked(staker.address)).to.deep.eq([{id: 'appstake', amount: 100n * nominal, reasons: 'All'}]);
+      await expect(helper.balance.transferToSubstrate(staker, recepient.address, 900n * nominal)).to.be.rejectedWith('balances.LiquidityRestrictions');
+
+      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(100n * nominal);
+      expect(await helper.balance.getSubstrate(staker.address) / nominal).to.be.equal(999n);
+      // it is potentially flaky test. Promotion can credited some tokens. Maybe we need to use closeTo?
+      expect(await helper.staking.getTotalStaked()).to.be.equal(totalStakedBefore + 100n * nominal); // total tokens amount staked in app-promotion increased
+
+
+      await helper.staking.stake(staker, 200n * nominal);
+      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(300n * nominal);
+      const totalStakedPerBlock = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      expect(totalStakedPerBlock[0].amount).to.equal(100n * nominal);
+      expect(totalStakedPerBlock[1].amount).to.equal(200n * nominal);
+    });
+
+    itSub('should allow to create maximum 10 stakes for account', async ({helper}) => {
+      const [staker] = await helper.arrange.createAccounts([2000n], donor);
+      for (let i = 0; i < 10; i++) {
+        await helper.staking.stake(staker, 100n * nominal);
+      }
+
+      // can have 10 stakes
+      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(1000n * nominal);
+      expect(await helper.staking.getTotalStakedPerBlock({Substrate: staker.address})).to.have.length(10);
+
+      await expect(helper.staking.stake(staker, 100n * nominal)).to.be.rejectedWith('appPromotion.NoPermission');
+
+      // After unstake can stake again
+      await helper.staking.unstake(staker);
+      await helper.staking.stake(staker, 100n * nominal);
+      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.equal(100n * nominal);
+    });
+
+    itSub('should reject transaction if stake amount is more than total free balance minus frozen', async ({helper}) => {
+      const staker = accounts.pop()!;
+
+      // Can't stake full balance because Alice needs to pay some fee
+      await expect(helper.staking.stake(staker, 1000n * nominal)).to.be.rejected;
+      await helper.staking.stake(staker, 500n * nominal);
+
+      // Can't stake 500 tkn because Alice has Less than 500 transferable;
+      await expect(helper.staking.stake(staker, 500n * nominal)).to.be.rejectedWith('balances.LiquidityRestrictions');
+      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(500n * nominal);
+    });
+
+    itSub('for different accounts in one block is possible', async ({helper}) => {
+      const crowd = [accounts.pop()!, accounts.pop()!, accounts.pop()!, accounts.pop()!];
+
+      const crowdStartsToStake = crowd.map(user => helper.staking.stake(user, 100n * nominal));
+      await expect(Promise.all(crowdStartsToStake)).to.be.fulfilled;
+
+      const crowdStakes = await Promise.all(crowd.map(address => helper.staking.getTotalStaked({Substrate: address.address})));
+      expect(crowdStakes).to.deep.equal([100n * nominal, 100n * nominal, 100n * nominal, 100n * nominal]);
+    });
+  });
+
+  describe('unstake extrinsic', () => {
+    itSub('should change balance state from "frozen" to "reserved", add it to "pendingUnstake" map, and subtract it from totalStaked', async ({helper}) => {
+      const [staker, recepient] = [accounts.pop()!, accounts.pop()!];
+      const totalStakedBefore = await helper.staking.getTotalStaked();
+      await helper.staking.stake(staker, 900n * nominal);
+      await helper.staking.unstake(staker);
+
+      // Right after unstake balance is reserved
+      // Staker can not transfer
+      expect(await helper.balance.getSubstrateFull(staker.address)).to.deep.contain({reserved: 900n * nominal, miscFrozen: 0n, feeFrozen: 0n});
+      await expect(helper.balance.transferToSubstrate(staker, recepient.address, 100n * nominal)).to.be.rejectedWith('balances.InsufficientBalance');
+      expect(await helper.staking.getPendingUnstake({Substrate: staker.address})).to.be.equal(900n * nominal);
+      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(0n);
+      expect(await helper.staking.getTotalStaked()).to.be.equal(totalStakedBefore);
+    });
+
+    itSub('should unlock balance after unlocking period ends and remove it from "pendingUnstake"', async ({helper}) => {
+      const staker = accounts.pop()!;
+      await helper.staking.stake(staker, 100n * nominal);
+      await helper.staking.unstake(staker);
+      const [pendingUnstake] = await helper.staking.getPendingUnstakePerBlock({Substrate: staker.address});
+
+      // Wait for unstaking period. Balance now free ~1000; reserved, frozen, miscFrozeb: 0n
+      await helper.wait.forParachainBlockNumber(pendingUnstake.block);
+      expect(await helper.balance.getSubstrateFull(staker.address)).to.deep.contain({reserved: 0n, miscFrozen: 0n, feeFrozen: 0n});
+      expect(await helper.balance.getSubstrate(staker.address) / nominal).to.be.equal(999n);
+
+      // staker can transfer:
+      await helper.balance.transferToSubstrate(staker, donor.address, 998n * nominal);
+      expect(await helper.balance.getSubstrate(staker.address) / nominal).to.be.equal(1n);
+    });
+
+    itSub('should successfully unstake multiple stakes', async ({helper}) => {
+      const staker = accounts.pop()!;
+      await helper.staking.stake(staker, 100n * nominal);
+      await helper.staking.stake(staker, 200n * nominal);
+      await helper.staking.stake(staker, 300n * nominal);
+
+      // staked: [100, 200, 300]; unstaked: 0
+      let totalPendingUnstake = await helper.staking.getPendingUnstake({Substrate: staker.address});
+      let pendingUnstake = await helper.staking.getPendingUnstakePerBlock({Substrate: staker.address});
+      let stakes = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      expect(totalPendingUnstake).to.be.deep.equal(0n);
+      expect(pendingUnstake).to.be.deep.equal([]);
+      expect(stakes[0].amount).to.equal(100n * nominal);
+      expect(stakes[1].amount).to.equal(200n * nominal);
+      expect(stakes[2].amount).to.equal(300n * nominal);
+
+      // Can unstake multiple stakes
+      await helper.staking.unstake(staker);
+      pendingUnstake = await helper.staking.getPendingUnstakePerBlock({Substrate: staker.address});
+      totalPendingUnstake = await helper.staking.getPendingUnstake({Substrate: staker.address});
+      stakes = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      expect(totalPendingUnstake).to.be.equal(600n * nominal);
+      expect(stakes).to.be.deep.equal([]);
+      expect(pendingUnstake[0].amount).to.equal(600n * nominal);
+
+      expect (await helper.balance.getSubstrateFull(staker.address)).to.deep.contain({reserved: 600n * nominal, feeFrozen: 0n, miscFrozen: 0n});
+      await helper.wait.forParachainBlockNumber(pendingUnstake[0].block);
+      expect (await helper.balance.getSubstrateFull(staker.address)).to.deep.contain({reserved: 0n, feeFrozen: 0n, miscFrozen: 0n});
+      expect (await helper.balance.getSubstrate(staker.address) / nominal).to.be.equal(999n);
+    });
+
+    itSub('should not have any effects if no active stakes', async ({helper}) => {
+      const staker = accounts.pop()!;
+
+      // unstake has no effect if no stakes at all
+      await helper.staking.unstake(staker);
+      expect(await helper.staking.getPendingUnstake({Substrate: staker.address})).to.be.equal(0n);
+      expect(await helper.balance.getSubstrate(staker.address) / nominal).to.be.equal(999n); // TODO bigint closeTo helper
+
+      // TODO stake() unstake() waitUnstaked() unstake();
+
+      // can't unstake if there are only pendingUnstakes
+      await helper.staking.stake(staker, 100n * nominal);
+      await helper.staking.unstake(staker);
+      await helper.staking.unstake(staker);
+
+      expect(await helper.staking.getPendingUnstake({Substrate: staker.address})).to.be.equal(100n * nominal);
+      expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(0n);
+    });
+
+    itSub('should keep different unlocking block for each unlocking stake', async ({helper}) => {
+      const staker = accounts.pop()!;
+      await helper.staking.stake(staker, 100n * nominal);
+      await helper.staking.unstake(staker);
+      await helper.staking.stake(staker, 120n * nominal);
+      await helper.staking.unstake(staker);
+
+      const unstakingPerBlock = await helper.staking.getPendingUnstakePerBlock({Substrate: staker.address});
+      expect(unstakingPerBlock).has.length(2);
+      expect(unstakingPerBlock[0].amount).to.equal(100n * nominal);
+      expect(unstakingPerBlock[1].amount).to.equal(120n * nominal);
+    });
+
+    itSub('should be possible for different accounts in one block', async ({helper}) => {
+      const stakers = [accounts.pop()!, accounts.pop()!, accounts.pop()!];
+
+      await Promise.all(stakers.map(staker => helper.staking.stake(staker, 100n * nominal)));
+      await Promise.all(stakers.map(staker => helper.staking.unstake(staker)));
+
+      await Promise.all(stakers.map(async (staker) => {
+        expect(await helper.staking.getPendingUnstake({Substrate: staker.address})).to.be.equal(100n * nominal);
+        expect(await helper.staking.getTotalStaked({Substrate: staker.address})).to.be.equal(0n);
+      }));
+    });
+  });
+
+  describe('collection sponsoring', () => {
+    itSub('should actually sponsor transactions', async ({helper}) => {
+      const api = helper.getApi();
+      const [collectionOwner, tokenSender, receiver] = [accounts.pop()!, accounts.pop()!, accounts.pop()!];
+      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'Name', description: 'Description', tokenPrefix: 'Prefix', limits: {sponsorTransferTimeout: 0}});
+      const token = await collection.mintToken(collectionOwner, {Substrate: tokenSender.address});
+      await helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId));
+      const palletBalanceBefore = await helper.balance.getSubstrate(palletAddress);
+
+      await token.transfer(tokenSender, {Substrate: receiver.address});
+      expect (await token.getOwner()).to.be.deep.equal({Substrate: receiver.address});
+      const palletBalanceAfter = await helper.balance.getSubstrate(palletAddress);
+
+      // senders balance the same, transaction has sponsored
+      expect (await helper.balance.getSubstrate(tokenSender.address)).to.be.equal(1000n * nominal);
+      expect (palletBalanceBefore > palletBalanceAfter).to.be.true;
+    });
+
+    itSub('can not be set by non admin', async ({helper}) => {
+      const api = helper.getApi();
+      const [collectionOwner, nonAdmin] = [accounts.pop()!, accounts.pop()!];
+
+      const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
+
+      await expect(helper.signTransaction(nonAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+      expect((await collection.getData())?.raw.sponsorship).to.equal('Disabled');
+    });
+
+    itSub('should set pallet address as confirmed admin', async ({helper}) => {
+      const api = helper.getApi();
+      const [collectionOwner, oldSponsor] = [accounts.pop()!, accounts.pop()!];
+
+      // Can set sponsoring for collection without sponsor
+      const collectionWithoutSponsor = await helper.nft.mintCollection(collectionOwner, {name: 'No-sponsor', description: 'New Collection', tokenPrefix: 'Promotion'});
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithoutSponsor.collectionId))).to.be.fulfilled;
+      expect((await collectionWithoutSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
+
+      // Can set sponsoring for collection with unconfirmed sponsor
+      const collectionWithUnconfirmedSponsor = await helper.nft.mintCollection(collectionOwner, {name: 'Unconfirmed', description: 'New Collection', tokenPrefix: 'Promotion', pendingSponsor: oldSponsor.address});
+      expect((await collectionWithUnconfirmedSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Unconfirmed: oldSponsor.address});
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithUnconfirmedSponsor.collectionId))).to.be.fulfilled;
+      expect((await collectionWithUnconfirmedSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
+
+      // Can set sponsoring for collection with confirmed sponsor
+      const collectionWithConfirmedSponsor = await helper.nft.mintCollection(collectionOwner, {name: 'Confirmed', description: 'New Collection', tokenPrefix: 'Promotion', pendingSponsor: oldSponsor.address});
+      await collectionWithConfirmedSponsor.confirmSponsorship(oldSponsor);
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithConfirmedSponsor.collectionId))).to.be.fulfilled;
+      expect((await collectionWithConfirmedSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
+    });
+
+    itSub('can be overwritten by collection owner', async ({helper}) => {
+      const api = helper.getApi();
+      const [collectionOwner, newSponsor] = [accounts.pop()!, accounts.pop()!];
+      const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
+      const collectionId = collection.collectionId;
+
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionId))).to.be.fulfilled;
+
+      // Collection limits still can be changed by the owner
+      expect(await collection.setLimits(collectionOwner, {sponsorTransferTimeout: 0})).to.be.true;
+      expect((await collection.getData())?.raw.limits.sponsorTransferTimeout).to.be.equal(0);
+      expect((await collection.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
+
+      // Collection sponsor can be changed too
+      expect((await collection.setSponsor(collectionOwner, newSponsor.address))).to.be.true;
+      expect((await collection.getData())?.raw.sponsorship).to.be.deep.equal({Unconfirmed: newSponsor.address});
+    });
+
+    itSub('should not overwrite collection limits set by the owner earlier', async ({helper}) => {
+      const api = helper.getApi();
+      const limits = {ownerCanDestroy: true, ownerCanTransfer: true, sponsorTransferTimeout: 0};
+      const collectionWithLimits = await helper.nft.mintCollection(accounts.pop()!, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', limits});
+
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithLimits.collectionId))).to.be.fulfilled;
+      expect((await collectionWithLimits.getData())?.raw.limits).to.be.deep.contain(limits);
+    });
+
+    itSub('should reject transaction if collection doesn\'t exist', async ({helper}) => {
+      const api = helper.getApi();
+      const collectionOwner = accounts.pop()!;
+
+      // collection has never existed
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(999999999))).to.be.rejected;
+      // collection has been burned
+      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
+      await collection.burn(collectionOwner);
+
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+    });
+  });
+
+  describe('stopSponsoringCollection', () => {
+    itSub('can not be called by non-admin', async ({helper}) => {
+      const api = helper.getApi();
+      const [collectionOwner, nonAdmin] = [accounts.pop()!, accounts.pop()!];
+      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
+
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
+
+      await expect(helper.signTransaction(nonAdmin, api.tx.appPromotion.stopSponsoringCollection(collection.collectionId))).to.be.rejected;
+      expect((await collection.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
+    });
+
+    itSub('should set sponsoring as disabled', async ({helper}) => {
+      const api = helper.getApi();
+      const [collectionOwner, recepient] = [accounts.pop()!, accounts.pop()!];
+      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', limits: {sponsorTransferTimeout: 0}});
+      const token = await collection.mintToken(collectionOwner, {Substrate: collectionOwner.address});
+
+      await helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId));
+      await helper.signTransaction(palletAdmin, api.tx.appPromotion.stopSponsoringCollection(collection.collectionId));
+
+      expect((await collection.getData())?.raw.sponsorship).to.be.equal('Disabled');
+
+      // Transactions are not sponsored anymore:
+      const ownerBalanceBefore = await helper.balance.getSubstrate(collectionOwner.address);
+      await token.transfer(collectionOwner, {Substrate: recepient.address});
+      const ownerBalanceAfter = await helper.balance.getSubstrate(collectionOwner.address);
+      expect(ownerBalanceAfter < ownerBalanceBefore).to.be.equal(true);
+    });
+
+    itSub('should not affect collection which is not sponsored by pallete', async ({helper}) => {
+      const api = helper.getApi();
+      const collectionOwner = accounts.pop()!;
+      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', pendingSponsor: collectionOwner.address});
+      await collection.confirmSponsorship(collectionOwner);
+
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.stopSponsoringCollection(collection.collectionId))).to.be.rejected;
+
+      expect((await collection.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: collectionOwner.address});
+    });
+
+    itSub('should reject transaction if collection does not exist', async ({helper}) => {
+      const collectionOwner = accounts.pop()!;
+      const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
+
+      await collection.burn(collectionOwner);
+      await expect(helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.stopSponsoringCollection', [collection.collectionId], true)).to.be.rejectedWith('common.CollectionNotFound');
+      await expect(helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.stopSponsoringCollection', [999_999_999], true)).to.be.rejectedWith('common.CollectionNotFound');
+    });
+  });
+
+  describe('contract sponsoring', () => {
+    itEth('should set palletes address as a sponsor', async ({helper}) => {
+      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
+      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
+
+      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address]);
+
+      expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.true;
+      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
+        confirmed: {
+          substrate: palletAddress,
+        },
+      });
+    });
+
+    itEth('should overwrite sponsoring mode and existed sponsor', async ({helper}) => {
+      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
+      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
+
+      await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.fulfilled;
+
+      // Contract is self sponsored
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.be.deep.equal({
+        confirmed: {
+          ethereum: flipper.options.address.toLowerCase(),
+        },
+      });
+
+      // set promotion sponsoring
+      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true);
+
+      // new sponsor is pallet address
+      expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.true;
+      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
+        confirmed: {
+          substrate: palletAddress,
+        },
+      });
+    });
+
+    itEth('can be overwritten by contract owner', async ({helper}) => {
+      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
+      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
+
+      // contract sponsored by pallet
+      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true);
+
+      // owner sets self sponsoring
+      await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.not.rejected;
+
+      expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.true;
+      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
+        confirmed: {
+          ethereum: flipper.options.address.toLowerCase(),
+        },
+      });
+    });
+
+    itEth('can not be set by non admin', async ({helper}) => {
+      const nonAdmin = accounts.pop()!;
+      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
+      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
+
+      await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.fulfilled;
+
+      // nonAdmin calls sponsorContract
+      await expect(helper.executeExtrinsic(nonAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true)).to.be.rejectedWith('appPromotion.NoPermission');
+
+      // contract still self-sponsored
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
+        confirmed: {
+          ethereum: flipper.options.address.toLowerCase(),
+        },
+      });
+    });
+
+    itEth('should actually sponsor transactions', async ({helper}) => {
+      // Contract caller
+      const caller = await helper.eth.createAccountWithBalance(donor, 1000n);
+      const palletBalanceBefore = await helper.balance.getSubstrate(palletAddress);
+
+      // Deploy flipper
+      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
+      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
+
+      // Owner sets to sponsor every tx
+      await contractHelper.methods.setSponsoringRateLimit(flipper.options.address, 0).send({from: contractOwner});
+      await contractHelper.methods.setSponsoringMode(flipper.options.address, SponsoringMode.Generous).send({from: contractOwner});
+      await helper.eth.transferBalanceFromSubstrate(donor, flipper.options.address, 1000n); // transferBalanceToEth(api, alice, flipper.options.address, 1000n);
+
+      // Set promotion to the Flipper
+      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true);
+
+      // Caller calls Flipper
+      await flipper.methods.flip().send({from: caller});
+      expect(await flipper.methods.getValue().call()).to.be.true;
+
+      // The contracts and caller balances have not changed
+      const callerBalance = await helper.balance.getEthereum(caller);
+      const contractBalanceAfter = await helper.balance.getEthereum(flipper.options.address);
+      expect(callerBalance).to.be.equal(1000n * nominal);
+      expect(1000n * nominal === contractBalanceAfter).to.be.true;
+
+      // The pallet balance has decreased
+      const palletBalanceAfter = await helper.balance.getSubstrate(palletAddress);
+      expect(palletBalanceAfter < palletBalanceBefore).to.be.true;
+    });
+  });
+
+  describe('stopSponsoringContract', () => {
+    itEth('should remove pallet address from contract sponsors', async ({helper}) => {
+      const caller = await helper.eth.createAccountWithBalance(donor, 1000n);
+      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner);
+      await helper.eth.transferBalanceFromSubstrate(donor, flipper.options.address);
+      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
+
+      await contractHelper.methods.setSponsoringMode(flipper.options.address, SponsoringMode.Generous).send({from: contractOwner});
+      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true);
+      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.stopSponsoringContract', [flipper.options.address], true);
+
+      expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.false;
+      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
+        disabled: null,
+      });
+
+      await flipper.methods.flip().send({from: caller});
+      expect(await flipper.methods.getValue().call()).to.be.true;
+
+      const callerBalance = await helper.balance.getEthereum(caller);
+      const contractBalanceAfter = await helper.balance.getEthereum(flipper.options.address);
+
+      // caller payed for call
+      expect(1000n * nominal > callerBalance).to.be.true;
+      expect(contractBalanceAfter).to.be.equal(100n * nominal);
+    });
+
+    itEth('can not be called by non-admin', async ({helper}) => {
+      const nonAdmin = accounts.pop()!;
+      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner);
+
+      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address]);
+      await expect(helper.executeExtrinsic(nonAdmin, 'api.tx.appPromotion.stopSponsoringContract', [flipper.options.address]))
+        .to.be.rejectedWith(/appPromotion\.NoPermission/);
+    });
+
+    itEth('should not affect a contract which is not sponsored by pallete', async ({helper}) => {
+      const nonAdmin = accounts.pop()!;
+      const contractOwner = (await helper.eth.createAccountWithBalance(donor, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner);
+      const contractHelper = await helper.ethNativeContract.contractHelpers(contractOwner);
+      await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.fulfilled;
+
+      await expect(helper.executeExtrinsic(nonAdmin, 'api.tx.appPromotion.stopSponsoringContract', [flipper.options.address], true)).to.be.rejectedWith('appPromotion.NoPermission');
+    });
+  });
+
+  describe('payoutStakers', () => {
+    itSub('can not be called by non admin', async ({helper}) => {
+      const nonAdmin = accounts.pop()!;
+      await expect(helper.admin.payoutStakers(nonAdmin, 100)).to.be.rejectedWith('appPromotion.NoPermission');
+    });
+
+    itSub('should increase total staked', async ({helper}) => {
+      const staker = accounts.pop()!;
+      const totalStakedBefore = await helper.staking.getTotalStaked();
+      await helper.staking.stake(staker, 100n * nominal);
+
+      // Wait for rewards and pay
+      const [stakedInBlock] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stakedInBlock.block));
+      const totalPayout = (await helper.admin.payoutStakers(palletAdmin, 100)).reduce((prev, payout) => prev + payout.payout, 0n);
+
+      const totalStakedAfter = await helper.staking.getTotalStaked();
+      expect(totalStakedAfter).to.equal(totalStakedBefore + (100n * nominal) + totalPayout);
+      // staker can unstake
+      await helper.staking.unstake(staker);
+      expect(await helper.staking.getTotalStaked()).to.be.equal(totalStakedAfter - calculateIncome(100n * nominal));
+    });
+
+    itSub('should credit 0.05% for staking period', async ({helper}) => {
+      const staker = accounts.pop()!;
+
+      await waitPromotionPeriodDoesntEnd(helper);
+
+      await helper.staking.stake(staker, 100n * nominal);
+      await helper.staking.stake(staker, 200n * nominal);
+
+      // wait rewards are available:
+      const [_stake1, stake2] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stake2.block));
+
+      const payoutToStaker = (await helper.admin.payoutStakers(palletAdmin, 100)).find((payout) => payout.staker === staker.address)?.payout;
+      expect(payoutToStaker + 300n * nominal).to.equal(calculateIncome(300n * nominal));
+
+      const totalStakedPerBlock = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      const income1 = calculateIncome(100n * nominal);
+      const income2 = calculateIncome(200n * nominal);
+      expect(totalStakedPerBlock[0].amount).to.equal(income1);
+      expect(totalStakedPerBlock[1].amount).to.equal(income2);
+
+      const stakerBalance = await helper.balance.getSubstrateFull(staker.address);
+      expect(stakerBalance).to.contain({miscFrozen: income1 + income2, feeFrozen: income1 + income2, reserved: 0n});
+      expect(stakerBalance.free / nominal).to.eq(999n);
+    });
+
+    itSub('shoud be paid for more than one period if payments was missed', async ({helper}) => {
+      const staker = accounts.pop()!;
+
+      await helper.staking.stake(staker, 100n * nominal);
+      // wait for two rewards are available:
+      let [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stake.block) + LOCKING_PERIOD);
+
+      await helper.admin.payoutStakers(palletAdmin, 100);
+      [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      const frozenBalanceShouldBe = calculateIncome(100n * nominal, 2);
+      expect(stake.amount).to.be.equal(frozenBalanceShouldBe);
+
+      const stakerFullBalance = await helper.balance.getSubstrateFull(staker.address);
+
+      expect(stakerFullBalance).to.contain({reserved: 0n, feeFrozen: frozenBalanceShouldBe, miscFrozen: frozenBalanceShouldBe});
+    });
+
+    itSub('should not be credited for unstaked (reserved) balance', async ({helper}) => {
+      // staker unstakes before rewards has been payed
+      const staker = accounts.pop()!;
+      await helper.staking.stake(staker, 100n * nominal);
+      const [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stake.block) + LOCKING_PERIOD);
+      await helper.staking.unstake(staker);
+
+      // so he did not receive any rewards
+      const totalBalanceBefore = await helper.balance.getSubstrate(staker.address);
+      await helper.admin.payoutStakers(palletAdmin, 100);
+      const totalBalanceAfter = await helper.balance.getSubstrate(staker.address);
+
+      expect(totalBalanceBefore).to.be.equal(totalBalanceAfter);
+    });
+
+    itSub('should bring compound interest', async ({helper}) => {
+      const staker = accounts.pop()!;
+
+      await helper.staking.stake(staker, 100n * nominal);
+
+      let [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stake.block));
+
+      await helper.admin.payoutStakers(palletAdmin, 100);
+      [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      expect(stake.amount).to.equal(calculateIncome(100n * nominal));
+
+      await helper.wait.forRelayBlockNumber(rewardAvailableInBlock(stake.block) + LOCKING_PERIOD);
+      await helper.admin.payoutStakers(palletAdmin, 100);
+      [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      expect(stake.amount).to.equal(calculateIncome(100n * nominal, 2));
+    });
+
+    itSub.skip('can be paid 1000 rewards in a time', async ({helper}) => {
+      // all other stakes should be unstaked
+      const oneHundredStakers = await helper.arrange.createCrowd(100, 1050n, donor);
+
+      // stakers stakes 10 times each
+      for (let i = 0; i < 10; i++) {
+        await Promise.all(oneHundredStakers.map(staker => helper.staking.stake(staker, 100n * nominal)));
+      }
+      await helper.wait.newBlocks(40);
+      await helper.admin.payoutStakers(palletAdmin, 100);
+    });
+
+    itSub.skip('can handle 40.000 rewards', async ({helper}) => {
+      const crowdStakes = async () => {
+        // each account in the crowd stakes 2 times
+        const crowd = await helper.arrange.createCrowd(500, 300n, donor);
+        await Promise.all(crowd.map(account => helper.staking.stake(account, 100n * nominal)));
+        await Promise.all(crowd.map(account => helper.staking.stake(account, 100n * nominal)));
+        //
+      };
+
+      for (let i = 0; i < 40; i++) {
+        await crowdStakes();
+      }
+
+      // TODO pay rewards for some period
+    });
+  });
+});
+
+function calculateIncome(base: bigint, iter = 0, calcPeriod: bigint = UNLOCKING_PERIOD): bigint {
+  const DAY = 7200n;
+  const ACCURACY = 1_000_000_000n;
+  // 5n / 10_000n = 0.05% p/day
+  const income = base + base * (ACCURACY * (calcPeriod * 5n) / (10_000n * DAY)) / ACCURACY ;
+
+  if (iter > 1) {
+    return calculateIncome(income, iter - 1, calcPeriod);
+  } else return income;
+}
+
+function rewardAvailableInBlock(stakedInBlock: bigint) {
+  if (stakedInBlock % LOCKING_PERIOD === 0n) return stakedInBlock + LOCKING_PERIOD;
+  return (stakedInBlock - stakedInBlock % LOCKING_PERIOD) + (LOCKING_PERIOD * 2n);
+}
+
+// Wait while promotion period less than specified block, to avoid boundary cases
+// 0 if this should be the beginning of the period.
+async function waitPromotionPeriodDoesntEnd(helper: DevUniqueHelper, waitBlockLessThan = LOCKING_PERIOD / 3n) {
+  const relayBlockNumber = (await helper.callRpc('api.query.parachainSystem.validationData', [])).value.relayParentNumber.toNumber(); // await helper.chain.getLatestBlockNumber();
+  const currentPeriodBlock = BigInt(relayBlockNumber) % LOCKING_PERIOD;
+
+  if (currentPeriodBlock > waitBlockLessThan) {
+    await helper.wait.forRelayBlockNumber(BigInt(relayBlockNumber) + LOCKING_PERIOD - currentPeriodBlock);
+  }
+}