This project demonstrates a Hardhat use case for zero knowledge proofs EVM Constellation Derivative Contract. It also comes with a sample contract, a test for that contract, and a script that deploys that contract.
Try running some of the following tasks:
npx hardhat help
npx hardhat compile --force
npx hardhat run scripts/deploy.js
npx hardhat test
REPORT_GAS=true npx hardhat test
npx hardhat node
npx hardhat run scripts/deploy.js- Features added to this version
- A. Add bidding and offering functionality:
- Allow users to place bids and offers for options
- Maintain mapping of bids and offers by user
- Allow accepting best bid/offer to sell option
- B. Integrate with Chainlink oracle for real-time #:
- Request latest price for a marketpair
- Fulfill latest price to use in executions
- C. Improve option lifecycle management:
- Allow early withdrawal of collateral
- Enable extending expiration time
- Add pausing functionality
- D. Enhance access controls:
- Make critical functions onlyOwner
- Add an onlyCreator modifier
- Allow transferring creator role
- E. Add time buffers before expiry:
- To prevent last minute sniping
- Configurable buffer duration
- F. Implement partial withdrawals:
- Allow users to withdraw a % of their bid
- G. Analyze market activity:
- Add functions to analyze bids/offers
- Determine if market is active
- H. Emit more events for transparency:
- All state changes should emit events
- I. Additional test cases:
- Focus on security and edge cases
- Use mocks for external dependencies
- J. Gas optimization:
- Add modifiers to limit gas usage
- Use paginated returns for mappings
Features Tracking Information:
- Added partial execution of an option by owner.
- Added an oracle for the latest price into the contract for market options.
- Allow fraction of an option to be traded.
- Considered and tested re-entrancy.
- Allow ERC20 tokens as collateral instead of only Ether.
- Add a pause/unpause ability for emergencies.
- Allow bids/offers instead of direct fixed prices.
- Add time buffers before expiry for executions.
- Added a cancelOption function to allow owner to cancel before expiry.
- Allow owner to withdraw collateral early if not executed.
- Validate addresses intransferOption and addToMarket.
- Separate collateral from premiums paid - have collateral returned in all cases.
- Added error messages for require statements to make debugging easier.
- Use SafeMath for subtraction as well to prevent underflows.
- Allow array params like counterOffer and price to be variable length rather than fixed size.
- Split Modifiers into reusable ones in a base contract.
- Added Logging and events are good for transparency.
- Added Mapping structures are efficient for storage.