Dear Sir,
How are you… 
I have kindly integrated cosmwasm smart contract testing frameworks in smart contract Dapps
Cwmultitest framework Integration:
The cwmultitest framework is a powerful tool for testing CosmWasm smart contracts. It allows for advanced testing scenarios by providing a mock blockchain environment.
I have kindly taken reference from - GitHub - archway-network/cw721-marketplace: Contracts for a variety of types of cw721 marketplaces
Stress Test Implementation -
The 
stress test implemented for the 
ad server smart contract is designed to evaluate how well the contract performs under heavy load 
. It involves adding a large number of 
ads and then serving each of them 
.
Significance of the Stress Test
Scalability:
This test evaluates how the contract performs when the number of operations scales significantly. Handling 1000 ads without performance issues demonstrates that the contract can handle large amounts of data 
and frequent interactions 
.
State Consistency:
The test ensures that the state (i.e., the views counter for each ad) remains consistent 
even when multiple ads are being served in rapid succession 
. This is crucial for maintaining data integrity during high traffic.
Performance Metrics:
The time measurements 
for adding and serving ads provide valuable data on the performance of the contract. If the time taken increases significantly with the number of ads, it might indicate potential performance bottlenecks 
.
Extensions
Higher Load Testing:
The number of ads can be increased beyond 1000 to test the limits 
of the contract’s storage and performance capabilities. Pushing the boundaries can reveal how the system handles extreme conditions.
Concurrent Testing:
Simulate multiple users 
interacting with the contract simultaneously to test how well it handles concurrent transactions 
. This can help ensure the contract remains functional under realworld scenarios with multiple users.
Gas Usage Analysis:
Measure the gas consumption for adding and serving ads under high load to ensure the contract remains costeffective 
to use. Optimizing gas usage can help reduce costs for contract interactions, making it more efficient.
These stress tests ensure contract is scalable, consistent, and efficient for users, providing a reliable and smooth experience even under heavy load.
1)Photosynthesis-Dorahacks-web3-competition-winner/prototypesindev/adserver-cw_multi_test/src/contract_stress_test.rs at main · suhasagg/Photosynthesis-Dorahacks-web3-competition-winner · GitHub
Stress Test evaluates the performance and scalability of the smart contract 
designed for handling cookie sync 
using the CosmWasm MultiTest framework .
Scalability: The test measures how well the contract performs when subjected to a large number of operations. In this case, it evaluates how the contract manages 
1,000 cookie additions and synchronizations. This is critical to ensure that the contract can handle high-load scenarios without any performance degradation .
State Consistency: By repeatedly adding and syncing cookies in a rapid sequence, the test ensures that the state of the contract (i.e., the number of cookies and their data) remains accurate and consistent. It ensures there are no race conditions or errors when handling large amounts of data .
Performance Metrics: The test logs the time 
taken to perform the operations, allowing to identify potential performance bottlenecks or areas for optimization 
.
Central Liquid stake in Stride, Quicksilver, Persistence One using Milkyway Hybrid Liquid Staking Cosmwasm Rust Smart contract
This smart contract allows users to stake their tokens, earn rewards, and participate in liquid staking. The contract also provides mechanisms for distributing both liquid tokens and redemption tokens back to stakers, with central pools managing these funds.
State Definitions
The contract keeps track of key data about the staking, rewards, and balances in its internal state:
- Owner
: The address of the contract’s owner. Only the owner can perform certain actions, such as distributing rewards and managing liquid/redemption pools.
- Current Epoch
: Tracks the current epoch of the staking period. Epochs are generally used to define reward periods.
- Staking Info
: A HashMap that stores information about each staker, including the amount they’ve staked and the epoch when their stake was last updated.
- Reward Info
: A HashMap that stores reward information for each staker, including the total rewards earned and the last epoch in which they claimed rewards.
- Reward Records : A
HashMap of reward records per staker, tracking their rewards over different epochs.
- Central Pool Balances
: Separate balances are maintained for:
- Liquid Pool
: Tokens available for distribution as liquid tokens.
- Redemption Pool : Tokens available for distribution as redemption tokens.
- Treasury Staking Pool
: Tokens staked by users.
Message Definitions
The contract supports several ExecuteMsg messages for interacting with the staking system:
- StakeTokens
: Allows a user to stake a specified amount of tokens.
- WithdrawRewards
: Allows a user to withdraw their rewards.
- UpdateEpoch : Increments the current epoch, which is done periodically (by a cron job or by the contract owner).
- DistributeLiquidTokens
: The contract owner can distribute liquid tokens to all stakers, proportional to their stake.
- DistributeRedemptionAmounts
: Similar to distributing liquid tokens, but this distributes redemption tokens.
- CentralLiquidStake : A command to execute central liquid staking (e.g., moving staked tokens into a liquid pool).
- CentralRedemption : A command to execute central redemption (e.g., converting liquid staked tokens into redeemable tokens).
Contract Functions
Instantiate
The instantiate function is called when the contract is deployed. It initializes the contract’s state, setting up all required structures, including the owner, pools, and initial balances.
- The contract is initialized by the owner, who is specified as the sender of the instantiation transaction.
- The contract sets up empty maps to track stakers, rewards, and internal pool balances.
Execute
The execute function handles all the various interactions with the contract based on the type of ExecuteMsg received. This includes staking tokens, distributing rewards, and managing the pools.
Core Functions of the Contract
Staking Tokens (StakeTokens)
When a user stakes tokens, the contract:
Checks that the user has sent the correct amount of tokens.- Updates the staker’s record in the
staking_info map.
- Increases the balance in the
central_treasury_staking_pool_balance to reflect the newly staked tokens.
log:
"Staker staker1 staked 1000 tokens. Total staked in pool: 1000. Staker total stake: 1000."
Withdraw Rewards (WithdrawRewards)
When a user withdraws their rewards:
- The contract checks the staker’s
reward_info.
- Rewards are reset to zero after withdrawal.
- Tokens are transferred to the staker from the contract’s liquid pool balance.
log:
"Staker staker1 withdrew rewards: 1000 tokens. Remaining liquid pool balance: 1000."
Distribute Liquid Tokens (DistributeLiquidTokens)
The owner distributes liquid tokens to all stakers proportionally to their stake:
- The contract checks the total staked amount and distributes tokens in proportion to each staker’s share of the pool.
- After distribution, the tokens are deducted from the
central_liquid_pool_balance.
Each liquid staker receives their portion of liquid tokens.
log:
"Distributed 666 liquid tokens to staker1."
Distribute Redemption Tokens (DistributeRedemptionAmounts)
Similar to distributing liquid tokens, redemption tokens are distributed to stakers. These tokens may represent stakers’ ability to redeem tokens at a future date.
log:
"Distributed 333 redemption tokens to staker1."
Central Liquid Stake (CentralLiquidStake)
This function simulates moving staked tokens from the treasury staking pool into the liquid pool for further operations. This represent staking tokens in another protocol (stride, quicksilver, pstake) to generate rewards/liquid tokens, which are then added to the liquid pool.
log:
"Central liquid stake executed. Added 1000 tokens to central liquid pool. New balances - Central Liquid Pool: 1000, Central Treasury Staking Pool: 500."
Central Redemption (CentralRedemption)
This function simulates moving Dapp redeemable liquid tokens into the redemption pool, allowing stakers to redeem their tokens.
log:
"Central redemption executed. Added 500 tokens to central redemption pool."
Query Functions
The contract provides query functions that allow external parties to retrieve specific information about the state of the contract, such as:
- Total Staked : The total amount of tokens staked by a specific user.
- Total Rewards : The total rewards earned by a specific user.
- GetState : Returns the entire state of the contract for inspection, useful for debugging and unit tests.
Unit Tests
The contract includes unit tests that simulate the entire lifecycle of the contract, from staking tokens to distributing liquid and redemption tokens.
- Initialization
: The contract is instantiated, and stakers are minted initial tokens.
- Staking : Stakers deposit tokens, which are recorded in the contract state.
- Central Liquid Stake and Distribution : The owner simulates liquid staking, and then liquid tokens are distributed to the stakers proportionally.
- Redemption : Redemption tokens are distributed, and the contract state is queried to verify that everything works as expected.
of test results:
"Distributed total of 1000 liquid tokens. Remaining liquid pool balance: 1."
Conclusion
This contract supports a full staking lifecycle, including staking, earning rewards, liquid staking, and redemption. The central pools for liquid and redemption tokens allow for flexible reward mechanisms, and the owner can control when and how these tokens are distributed. Each function includes detailed logs that make it easy to follow the flow of funds and ensure correctness during operations.
The smart contract is highly flexible, allowing for different staking models, and it can be extended to include additional functionalities such as reward mechanisms or token swaps between different staking pools.
Stored contract code with code_id: 1
Contract instantiated by owner
Instantiated contract at address: contract0
Minted 3000 tokens to staker1
Minted 2000 tokens to staker2
Minted 5000 tokens to contract’s balance
Initial Balances:
Staker1: 3000
Staker2: 2000
Contract: 5000
Staker staker1 staked 1000 tokens. Total staked in pool: 1000. Staker total stake: 1000.
Staker1 staked 1000 tokens.
StakeTokens Response Attributes for Staker1:
Event: execute
_contract_addr: contract0
Event: wasm
_contract_addr: contract0
action: stake_tokens
staker: staker1
amount_staked: 1000
total_staked_in_pool: 1000
staker_total_stake: 1000
Staker staker2 staked 500 tokens. Total staked in pool: 1500. Staker total stake: 500.
Staker2 staked 500 tokens.
StakeTokens Response Attributes for Staker2:
Event: execute
_contract_addr: contract0
Event: wasm
_contract_addr: contract0
action: stake_tokens
staker: staker2
amount_staked: 500
total_staked_in_pool: 1500
staker_total_stake: 500
Central Treasury Staking Pool Balance after staking: 1500
Central liquid stake executed. Added 1000 tokens to central liquid pool. New balances - Central Liquid Pool: 1000, Central Treasury Staking Pool: 500.
Executed Central Liquid Stake.
CentralLiquidStake Response Attributes:
Event: execute
_contract_addr: contract0
Event: wasm
_contract_addr: contract0
method: central_liquid_stake
amount_added: 1000
central_liquid_pool_balance: 1000
central_treasury_staking_pool_balance: 500
Distributed 666 liquid tokens to staker1.
Distributed 333 liquid tokens to staker2.
Distributed total of 1000 liquid tokens. Remaining liquid pool balance: 1.
Distributed Liquid Tokens.
DistributeLiquidTokens Response Attributes:
Event: execute
_contract_addr: contract0
Event: wasm
_contract_addr: contract0
action: distribute_liquid_tokens
remaining_liquid_pool_balance: 1
Event: transfer
recipient: staker1
sender: contract0
amount: 666token
Event: transfer
recipient: staker2
sender: contract0
amount: 333token
Balances after Liquid Token Distribution:
Staker1: 2666
Staker2: 1833
Central redemption executed. Added 500 tokens to central redemption pool. New balances - Central Redemption Pool: 500, Central Treasury Staking Pool: 0.
Executed Central Redemption.
CentralRedemption Response Attributes:
Event: execute
_contract_addr: contract0
Event: wasm
_contract_addr: contract0
method: central_redemption
amount_added: 500
central_redemption_pool_balance: 500
central_treasury_staking_pool_balance: 0
Distributed 333 redemption tokens to staker1.
Distributed 166 redemption tokens to staker2.
Distributed total of 500 redemption tokens. Remaining redemption pool balance: 1.
Distributed Redemption Amounts.
DistributeRedemptionAmounts Response Attributes:
Event: execute
_contract_addr: contract0
Event: wasm
_contract_addr: contract0
action: distribute_redemption_amounts
remaining_redemption_pool_balance: 1
Event: transfer
recipient: staker1
sender: contract0
amount: 333token
Event: transfer
recipient: staker2
sender: contract0
amount: 166token
Balances after Redemption Distribution:
Staker1: 2999
Staker2: 1999
Final State of the Contract:
State {
owner: Addr(
“owner”,
),
current_epoch: 0,
staking_info: {
“staker2”: StakeInfo {
amount: Uint128(
500,
),
last_updated_epoch: 0,
},
“staker1”: StakeInfo {
amount: Uint128(
1000,
),
last_updated_epoch: 0,
},
},
reward_info: {},
reward_records: {},
total_liquid_tokens: Uint128(
0,
),
total_redemption_tokens: Uint128(
0,
),
contract_addresses: ,
central_liquid_pool_balance: Uint128(
1,
),
central_redemption_pool_balance: Uint128(
1,
),
central_treasury_staking_pool_balance: Uint128(
0,
),
}
Contract’s final balance: 5002
Staker1 received 666 tokens from Liquid Distribution.
Staker2 received 333 tokens from Liquid Distribution.
Staker1 received 333 tokens from Redemption Distribution.
Staker2 received 166 tokens from Redemption Distribution.
Final Balances:
Staker1: 2999
Staker2: 1999
Contract: 5002
