Matching Engine V2 new PR on top of the part 1 PR#1225 with already approved code

[Sean329]

HyperdriveMatchingEngineV2 PR Description

Overview

This PR introduces HyperdriveMatchingEngineV2, an enhanced matching engine for Hyperdrive that facilitates efficient order matching and position trading. The engine supports direct position minting/burning and position transfers between traders.

Key Features

Order Types Support

• OpenLong: Open a long position
• OpenShort: Open a short position
• CloseLong: Close an existing long position
• CloseShort: Close an existing short position

Core Functionalities

1. Order Matching (matchOrders)

   • Matches complementary orders (e.g., OpenLong + OpenShort)
   • Supports position transfers between traders
   • Handles partial fills
   • Includes surplus distribution mechanism

2. Direct Order Filling (fillOrder)

   • Allows immediate order execution by takers
   • Supports maker-taker model
   • Maintains order state tracking

3. EIP-712 Signature Support

   • Secure order signing and verification
   • Support for both EOA and contract signatures

Safety Features

• Reentrancy protection
• Order expiration checks
• Counterparty validation
• Maturity time validation
• Fund amount validation
• Token amount buffer for gas optimization

Technical Improvements

• Direct mint/burn operations instead of flash loans
• Optimized gas usage with TOKEN_AMOUNT_BUFFER
• Enhanced order state tracking
• Comprehensive error handling

Testing Coverage

The implementation includes extensive test coverage:

• Basic order matching scenarios
• Position transfer cases
• Partial fill scenarios
• Edge cases and failure conditions
• Fuzzing tests for TOKEN_AMOUNT_BUFFER validation

Interface Changes

The IHyperdriveMatchingEngineV2 interface provides:

• Clear error definitions
• Comprehensive event logging
• Structured order intent definition
• Order amount tracking

Security Considerations

• All monetary operations use SafeERC20
• Strict validation of order parameters
• Protected against common attack vectors
• Clear access control mechanisms

Breaking Changes

None. This is a new contract implementation that can coexist with previous versions.

Next Steps

• Complete security audit
• Add integration tests
• Update documentation
• Deploy to testnet

Related Issues

• Closes #[issue-number]
• References #[related-issue-number]

resolves #1222

[github-actions]

Hyperdrive Gas Benchmark

Benchmark suite	Current: c65c98e	Previous: 3497650	Deviation	Status
addLiquidity: min	33877 gas	33899 gas	-0.0649%	✅
addLiquidity: avg	203454 gas	203380 gas	0.0364%	🚨
addLiquidity: max	187754 gas	191291 gas	-1.8490%	✅
burn: min	31471 gas	31493 gas	-0.0699%	✅
burn: avg	135785 gas	136107 gas	-0.2366%	✅
burn: max	111163 gas	111180 gas	-0.0153%	✅
checkpoint: min	40267 gas	40289 gas	-0.0546%	✅
checkpoint: avg	148332 gas	148356 gas	-0.0162%	✅
checkpoint: max	149197 gas	149219 gas	-0.0147%	✅
closeLong: min	31459 gas	31481 gas	-0.0699%	✅
closeLong: avg	146544 gas	146214 gas	0.2257%	🚨
closeLong: max	126667 gas	126689 gas	-0.0174%	✅
closeShort: min	31425 gas	31336 gas	0.2840%	🚨
closeShort: avg	137776 gas	137443 gas	0.2423%	🚨
closeShort: max	132669 gas	132580 gas	0.0671%	🚨
initialize: min	31291 gas	31313 gas	-0.0703%	✅
initialize: avg	355249 gas	355025 gas	0.0631%	🚨
initialize: max	355631 gas	355601 gas	0.0084%	🚨
openLong: min	33440 gas	33330 gas	0.3300%	🚨
openLong: avg	179731 gas	179602 gas	0.0718%	🚨
openLong: max	191544 gas	191434 gas	0.0575%	🚨
openShort: min	33874 gas	33896 gas	-0.0649%	✅
openShort: avg	180154 gas	180333 gas	-0.0993%	✅
openShort: max	170046 gas	170068 gas	-0.0129%	✅
redeemWithdrawalShares: min	31259 gas	31259 gas	0%	🟰
redeemWithdrawalShares: avg	77114 gas	77780 gas	-0.8563%	✅
redeemWithdrawalShares: max	67460 gas	67460 gas	0%	🟰
removeLiquidity: min	31243 gas	31265 gas	-0.0704%	✅
removeLiquidity: avg	214072 gas	214089 gas	-0.0079%	✅
removeLiquidity: max	220553 gas	218337 gas	1.0149%	🚨

This comment was automatically generated by workflow using github-action-benchmark.

[coveralls]

Pull Request Test Coverage Report for Build 13321830238

Details

• 196 of 334 (58.68%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-2.7%) to 86.513%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
contracts/src/matching/HyperdriveMatchingEngineV2.sol	196	334	58.68%

Totals
Change from base Build 13148119986:	-2.7%
Covered Lines:	3233
Relevant Lines:	3737

---

💛 - Coveralls