git.delta.rocks / unique-network / refs/commits / 5fb293eff7dc

difftreelog

Fix test: fix create accounts script for devnode

Max Andreev2022-09-15parent: #343d804.patch.diff
in: master
- add waiter for create accounts script
- wrap promotion tests in global describe to avoid accounts creation
for each describe

2 files changed

modifiedtests/src/app-promotion.test.tsdiffbeforeafterboth
--- a/tests/src/app-promotion.test.ts
+++ b/tests/src/app-promotion.test.ts
@@ -36,691 +36,664 @@
 const UNLOCKING_PERIOD = 10n; // 10 blocks of parachain
 const rewardAvailableInBlock = (stakedInBlock: bigint) => (stakedInBlock - stakedInBlock % LOCKING_PERIOD) + (LOCKING_PERIOD * 2n);
 
-const beforeEach = async (context: Mocha.Context) => {
-  await usingPlaygrounds(async (helper, privateKey) => {
-    if (!getModuleNames(helper.api!).includes(Pallets.AppPromotion)) context.skip();
-    alice = privateKey('//Alice');
-    palletAdmin = privateKey('//Charlie'); // TODO use custom address
-    await helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})));
-    nominal = helper.balance.getOneTokenNominal();
-    await helper.balance.transferToSubstrate(alice, palletAdmin.address, 1000n * nominal);
-    await helper.balance.transferToSubstrate(alice, palletAddress, 1000n * nominal);
-    accounts = await helper.arrange.createCrowd(100, 1000n, alice); // create accounts-pool to speed up tests
-  });
-};
-
-describe('app-promotions.stake extrinsic', () => {
+describe('App promotion', () => {
   before(async function () {
-    await beforeEach(this);
+    await usingPlaygrounds(async (helper, privateKey) => {
+      if (!getModuleNames(helper.api!).includes(Pallets.AppPromotion)) this.skip();
+      alice = privateKey('//Alice');
+      palletAdmin = privateKey('//Charlie'); // TODO use custom address
+      await helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})));
+      nominal = helper.balance.getOneTokenNominal();
+      await helper.balance.transferToSubstrate(alice, palletAdmin.address, 1000n * nominal);
+      await helper.balance.transferToSubstrate(alice, palletAddress, 1000n * nominal);
+      accounts = await helper.arrange.createCrowd(100, 1000n, alice); // create accounts-pool to speed up tests
+    });
   });
 
-  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});
-    await expect(helper.balance.transferToSubstrate(staker, recepient.address, 900n * nominal)).to.be.rejectedWith('balances.LiquidityRestrictions');
+  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});
+      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], alice);
+      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);
+    });
     
-    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 
-
+    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);
+    });
     
-    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('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]);
+    });
   });
-
-  itSub('should allow to create maximum 10 stakes for account', async ({helper}) => {
-    const [staker] = await helper.arrange.createAccounts([2000n], alice);
-    for (let i = 0; i < 10; i++) {
+  
+  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);
-    }
-
-    // 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);
-  });
+      await helper.staking.unstake(staker);
+      const [pendingUnstake] = await helper.staking.getPendingUnstakePerBlock({Substrate: staker.address});
   
-  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);
-  });
+      // 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);
   
-  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 balance extrinsic', () => {  
-  before(async function () {
-    await beforeEach(this);
-  });
-
-  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, alice.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) => {
+      // staker can transfer:
+      await helper.balance.transferToSubstrate(staker, alice.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);
-    }));
-  });
-});
-
-describe('Admin adress', () => {
-  before(async function () {
-    await beforeEach(this);
-  });
-
-  itSub('can be set by sudo only', async ({helper}) => {
-    const nonAdmin = accounts.pop()!;
-    // nonAdmin can not set admin not from himself nor as a sudo
-    await expect(helper.signTransaction(nonAdmin, helper.api!.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address}))).to.be.rejected;
-    await expect(helper.signTransaction(nonAdmin, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address})))).to.be.rejected;
-
-    // Alice can
-    await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})))).to.be.fulfilled;
-  });
+    });
+  
+    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);
   
-  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 account = accounts.pop()!;
-    const ethAccount = helper.address.substrateToEth(account.address); 
-    // Alice sets Ethereum address as a sudo. Then Substrate address back...
-    await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Ethereum: ethAccount})))).to.be.fulfilled;
-    await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.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, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
-  });
-
-  itSub('can be reassigned', async ({helper}) => {
-    const [oldAdmin, newAdmin, collectionOwner] = [accounts.pop()!, accounts.pop()!, accounts.pop()!];
-    const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
-      
-    await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress(normalizeAccountId(oldAdmin))))).to.be.fulfilled;
-    await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress(normalizeAccountId(newAdmin))))).to.be.fulfilled;
-    await expect(helper.signTransaction(oldAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
-      
-    await expect(helper.signTransaction(newAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
-  });
-});
-
-describe('App-promotion collection sponsoring', () => {
-  before(async function () {
-    await beforeEach(this);
-    await usingPlaygrounds(async (helper) => {
-      const tx = helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address}));
-      await helper.signTransaction(alice, tx);
+      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 actually sponsor transactions', async ({helper}) => {
-    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, helper.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 [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, helper.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 [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, helper.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, helper.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, helper.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 [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, helper.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 limits = {ownerCanDestroy: true, ownerCanTransfer: true, sponsorTransferTimeout: 0};
-    const collectionWithLimits = await helper.nft.mintCollection(alice, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', limits});
-
-    await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collectionWithLimits.collectionId))).to.be.fulfilled;
-    expect((await collectionWithLimits.getData())?.raw.limits).to.be.deep.contain(limits);
-  });
+    itSub('should be possible for different accounts in one block', async ({helper}) => {
+      const stakers = [accounts.pop()!, accounts.pop()!, accounts.pop()!];
   
-  itSub('should reject transaction if collection doesn\'t exist', async ({helper}) => {
-    const collectionOwner = accounts.pop()!;
-      
-    // collection has never existed
-    await expect(helper.signTransaction(palletAdmin, helper.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, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
-  });
-});
-
-describe('app-promotion stopSponsoringCollection', () => {
-  before(async function () {
-    await beforeEach(this);
+      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);
+      }));
+    });
   });
-
-  itSub('can not be called by non-admin', async ({helper}) => {    
-    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, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
-      
-    await expect(helper.signTransaction(nonAdmin, helper.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 [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, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId));
-    await helper.signTransaction(palletAdmin, helper.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 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, helper.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('app-promotion contract sponsoring', () => {
-  before(async function () {
-    await beforeEach(this);
-  });
-
-  itEth('should set palletes address as a sponsor', async ({helper}) => {
-    const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
-    const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
-    const contractHelper = helper.ethNativeContract.contractHelpers(contractOwner);
-
-    await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address]);
+  
+  describe('admin adress', () => {
+    itSub('can be set by sudo only', async ({helper}) => {
+      const nonAdmin = accounts.pop()!;
+      // nonAdmin can not set admin not from himself nor as a sudo
+      await expect(helper.signTransaction(nonAdmin, helper.api!.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address}))).to.be.rejected;
+      await expect(helper.signTransaction(nonAdmin, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address})))).to.be.rejected;
+  
+      // Alice can
+      await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})))).to.be.fulfilled;
+    });
     
-    expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.true;  
-    expect((await helper.api!.query.evmContractHelpers.owner(flipper.options.address)).toJSON()).to.be.equal(contractOwner);  
-    expect((await helper.api!.query.evmContractHelpers.sponsoring(flipper.options.address)).toJSON()).to.deep.equal({
-      confirmed: {
-        substrate: palletAddress,
-      },
+    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 account = accounts.pop()!;
+      const ethAccount = helper.address.substrateToEth(account.address); 
+      // Alice sets Ethereum address as a sudo. Then Substrate address back...
+      await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Ethereum: ethAccount})))).to.be.fulfilled;
+      await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.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, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+    });
+  
+    itSub('can be reassigned', async ({helper}) => {
+      const [oldAdmin, newAdmin, collectionOwner] = [accounts.pop()!, accounts.pop()!, accounts.pop()!];
+      const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
+        
+      await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress(normalizeAccountId(oldAdmin))))).to.be.fulfilled;
+      await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress(normalizeAccountId(newAdmin))))).to.be.fulfilled;
+      await expect(helper.signTransaction(oldAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+        
+      await expect(helper.signTransaction(newAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
     });
   });
-
-  itEth('should overwrite sponsoring mode and existed sponsor', async ({helper}) => {
-    const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
-    const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
-    const contractHelper = helper.ethNativeContract.contractHelpers(contractOwner);
-
-    await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.fulfilled;
-
-    // Contract is self sponsored
-    expect((await helper.api!.query.evmContractHelpers.sponsoring(flipper.options.address)).toJSON()).to.be.deep.equal({
-      confirmed: {
-        ethereum: flipper.options.address.toLowerCase(),
-      },
+  
+  describe('collection sponsoring', () => {
+    before(async function () {
+      await usingPlaygrounds(async (helper) => {
+        const tx = helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address}));
+        await helper.signTransaction(alice, tx);
+      });
     });
-
-    // 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,
-      },
+  
+    itSub('should actually sponsor transactions', async ({helper}) => {
+      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, helper.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;
     });
-  });
-
-  itEth('can be overwritten by contract owner', async ({helper}) => {
-    const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
-    const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
-    const contractHelper = 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.api!.query.evmContractHelpers.owner(flipper.options.address)).toJSON()).to.be.equal(contractOwner);  
-    expect((await helper.api!.query.evmContractHelpers.sponsoring(flipper.options.address)).toJSON()).to.deep.equal({
-      confirmed: {
-        ethereum: flipper.options.address.toLowerCase(),
-      },
+  
+    itSub('can not be set by non admin', async ({helper}) => {
+      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, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+      expect((await collection.getData())?.raw.sponsorship).to.equal('Disabled');
     });
-  });
-
-  itEth('can not be set by non admin', async ({helper}) => {
-    const nonAdmin = accounts.pop()!;
-    const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
-    const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
-    const contractHelper = 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.api!.query.evmContractHelpers.sponsoring(flipper.options.address)).toJSON()).to.deep.equal({
-      confirmed: {
-        ethereum: flipper.options.address.toLowerCase(),
-      },
+  
+    itSub('should set pallet address as confirmed admin', async ({helper}) => {
+      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, helper.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, helper.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, helper.api!.tx.appPromotion.sponsorCollection(collectionWithConfirmedSponsor.collectionId))).to.be.fulfilled;
+      expect((await collectionWithConfirmedSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
     });
-  });
-
-  itEth('should actually sponsor transactions', async ({helper}) => {
-    // Contract caller
-    const caller = await helper.eth.createAccountWithBalance(alice, 1000n);
-    const palletBalanceBefore = await helper.balance.getSubstrate(palletAddress);
+  
+    itSub('can be overwritten by collection owner', async ({helper}) => {    
+      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, helper.api!.tx.appPromotion.sponsorCollection(collectionId))).to.be.fulfilled;
         
-    // Deploy flipper
-    const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
-    const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
-    const contractHelper = helper.ethNativeContract.contractHelpers(contractOwner);
+      // 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});
+    });
     
-    // 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(alice, flipper.options.address, 1000n); // transferBalanceToEth(api, alice, flipper.options.address, 1000n);
-
-    // Set promotion to the Flipper
-    await helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorContract(flipper.options.address));
-
-    // 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('app-promotion stopSponsoringContract', () => {  
-  before(async function () {
-    await beforeEach(this);
-  });
-
-  itEth('should remove pallet address from contract sponsors', async ({helper}) => {
-    const caller = await helper.eth.createAccountWithBalance(alice, 1000n);
-    const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
-    const flipper = await helper.eth.deployFlipper(contractOwner);
-    await helper.eth.transferBalanceFromSubstrate(alice, flipper.options.address);
-    const contractHelper = 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.api!.query.evmContractHelpers.owner(flipper.options.address)).toJSON()).to.be.equal(contractOwner);  
-    expect((await helper.api!.query.evmContractHelpers.sponsoring(flipper.options.address)).toJSON()).to.deep.equal({
-      disabled: null,
+    itSub('should not overwrite collection limits set by the owner earlier', async ({helper}) => {
+      const limits = {ownerCanDestroy: true, ownerCanTransfer: true, sponsorTransferTimeout: 0};
+      const collectionWithLimits = await helper.nft.mintCollection(alice, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', limits});
+  
+      await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collectionWithLimits.collectionId))).to.be.fulfilled;
+      expect((await collectionWithLimits.getData())?.raw.limits).to.be.deep.contain(limits);
     });
-
-    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(1000n * nominal);
-  });
-
-  itEth('can not be called by non-admin', async ({helper}) => {
-    const nonAdmin = accounts.pop()!;
-    const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
-    const flipper = await helper.eth.deployFlipper(contractOwner);
-
-    await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address]);
-    const stopSponsoringResult = await helper.executeExtrinsic(nonAdmin, 'api.tx.appPromotion.stopSponsoringContract', [flipper.options.address]);
-    expect(stopSponsoringResult.status).to.equal('Fail');
-    expect(stopSponsoringResult.moduleError).to.equal('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(alice, 1000n)).toLowerCase();
-    const flipper = await helper.eth.deployFlipper(contractOwner);
-    const contractHelper = 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('app-promotion rewards', () => {
-  before(async function () {
-    await beforeEach(this);
-  });
-
-  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, 10n));
-  });
-
-  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 [_, 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, 10n));
-
-    const totalStakedPerBlock = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-    expect(totalStakedPerBlock[0].amount).to.equal(calculateIncome(100n * nominal, 10n));
-    expect(totalStakedPerBlock[1].amount).to.equal(calculateIncome(200n * nominal, 10n));
-  });
-
-  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, 10n, 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 reject transaction if collection doesn\'t exist', async ({helper}) => {
+      const collectionOwner = accounts.pop()!;
+        
+      // collection has never existed
+      await expect(helper.signTransaction(palletAdmin, helper.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, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+    });
   });
   
-  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);
+  describe('stopSponsoringCollection', () => {
+    itSub('can not be called by non-admin', async ({helper}) => {    
+      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, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
+        
+      await expect(helper.signTransaction(nonAdmin, helper.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 [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, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId));
+      await helper.signTransaction(palletAdmin, helper.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 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, helper.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');
+    });
   });
   
-  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));
+  describe('contract sponsoring', () => {
+    itEth('should set palletes address as a sponsor', async ({helper}) => {
+      const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
+      const contractHelper = helper.ethNativeContract.contractHelpers(contractOwner);
+  
+      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address]);
       
-    await helper.admin.payoutStakers(palletAdmin, 100);
-    [stake] = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
-    expect(stake.amount).to.equal(calculateIncome(100n * nominal, 10n));
+      expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.true;  
+      expect((await helper.api!.query.evmContractHelpers.owner(flipper.options.address)).toJSON()).to.be.equal(contractOwner);  
+      expect((await helper.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(alice, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
+      const contractHelper = helper.ethNativeContract.contractHelpers(contractOwner);
+  
+      await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.fulfilled;
+  
+      // Contract is self sponsored
+      expect((await helper.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(alice, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
+      const contractHelper = 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.api!.query.evmContractHelpers.owner(flipper.options.address)).toJSON()).to.be.equal(contractOwner);  
+      expect((await helper.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(alice, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
+      const contractHelper = 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.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(alice, 1000n);
+      const palletBalanceBefore = await helper.balance.getSubstrate(palletAddress);
+          
+      // Deploy flipper
+      const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner); // await deployFlipper(web3, contractOwner);
+      const contractHelper = helper.ethNativeContract.contractHelpers(contractOwner);
       
-    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, 10n, 2));
+      // 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(alice, flipper.options.address, 1000n); // transferBalanceToEth(api, alice, flipper.options.address, 1000n);
+  
+      // Set promotion to the Flipper
+      await helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorContract(flipper.options.address));
+  
+      // 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;
+    });
   });
-
-  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, alice);
-
-    // 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);
+  
+  describe('stopSponsoringContract', () => {  
+    itEth('should remove pallet address from contract sponsors', async ({helper}) => {
+      const caller = await helper.eth.createAccountWithBalance(alice, 1000n);
+      const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner);
+      await helper.eth.transferBalanceFromSubstrate(alice, flipper.options.address);
+      const contractHelper = 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.api!.query.evmContractHelpers.owner(flipper.options.address)).toJSON()).to.be.equal(contractOwner);  
+      expect((await helper.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(1000n * nominal);
+    });
+  
+    itEth('can not be called by non-admin', async ({helper}) => {
+      const nonAdmin = accounts.pop()!;
+      const contractOwner = (await helper.eth.createAccountWithBalance(alice, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner);
+  
+      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address]);
+      const stopSponsoringResult = await helper.executeExtrinsic(nonAdmin, 'api.tx.appPromotion.stopSponsoringContract', [flipper.options.address]);
+      expect(stopSponsoringResult.status).to.equal('Fail');
+      expect(stopSponsoringResult.moduleError).to.equal('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(alice, 1000n)).toLowerCase();
+      const flipper = await helper.eth.deployFlipper(contractOwner);
+      const contractHelper = 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');
+    });
   });
-
-  itSub.skip('can handle 40.000 rewards', async ({helper}) => {
-    const [donor] = await helper.arrange.createAccounts([7_000_000n], alice);
-    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
+  
+  describe('rewards', () => {
+    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, 10n));
+    });
+  
+    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 [_, 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, 10n));
+  
+      const totalStakedPerBlock = await helper.staking.getTotalStakedPerBlock({Substrate: staker.address});
+      expect(totalStakedPerBlock[0].amount).to.equal(calculateIncome(100n * nominal, 10n));
+      expect(totalStakedPerBlock[1].amount).to.equal(calculateIncome(200n * nominal, 10n));
+    });
+  
+    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, 10n, 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, 10n));
+        
+      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, 10n, 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, alice);
+  
+      // 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 [donor] = await helper.arrange.createAccounts([7_000_000n], alice);
+      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
+    });
   });
 });
 
modifiedtests/src/util/playgrounds/unique.dev.tsdiffbeforeafterboth
122 */122 */
123 createAccounts = async (balances: bigint[], donor: IKeyringPair): Promise<IKeyringPair[]> => {123 createAccounts = async (balances: bigint[], donor: IKeyringPair): Promise<IKeyringPair[]> => {
124 let nonce = await this.helper.chain.getNonce(donor.address);124 let nonce = await this.helper.chain.getNonce(donor.address);
125 const wait = new WaitGroup(this.helper);
125 const ss58Format = this.helper.chain.getChainProperties().ss58Format;126 const ss58Format = this.helper.chain.getChainProperties().ss58Format;
126 const tokenNominal = this.helper.balance.getOneTokenNominal();127 const tokenNominal = this.helper.balance.getOneTokenNominal();
127 const transactions = [];128 const transactions = [];
156 for (let index = 0; index < 5; index++) {157 for (let index = 0; index < 5; index++) {
157 accountsCreated = await checkBalances();158 accountsCreated = await checkBalances();
158 if(accountsCreated) break;159 if(accountsCreated) break;
159 160 await wait.newBlocks(1);
160 }161 }
161162
162 if (!accountsCreated) throw Error('Accounts generation failed');163 if (!accountsCreated) throw Error('Accounts generation failed');