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Krypto Kajun 850223a953 fix(multicall): resolve critical multicall parsing corruption issues

- Added comprehensive bounds checking to prevent buffer overruns in multicall parsing
- Implemented graduated validation system (Strict/Moderate/Permissive) to reduce false positives
- Added LRU caching system for address validation with 10-minute TTL
- Enhanced ABI decoder with missing Universal Router and Arbitrum-specific DEX signatures
- Fixed duplicate function declarations and import conflicts across multiple files
- Added error recovery mechanisms with multiple fallback strategies
- Updated tests to handle new validation behavior for suspicious addresses
- Fixed parser test expectations for improved validation system
- Applied gofmt formatting fixes to ensure code style compliance
- Fixed mutex copying issues in monitoring package by introducing MetricsSnapshot
- Resolved critical security vulnerabilities in heuristic address extraction
- Progress: Updated TODO audit from 10% to 35% complete

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-10-17 00:12:55 -05:00

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Curve Integration Plan

Overview

This document outlines the implementation plan for Curve exchange support in the MEV bot. Curve specializes in stablecoin and pegged-asset swaps with low slippage and low fees.

Contract Architecture

Core Contracts

Main Registry: 0x7D86446dDb609eD0F5f8684AcF3037Ffb6149cC6
Factory Registry: 0xF1815bdCbcC67D79Cbb7B3C7b2E6d9992E6C1e86
Router: 0x8474DdbE98F5aC77e0C38b3C97ad441436D69d2C
Exchange Proxy: 0xD152CC3E6A9Ca3Cd5085767eD16a8921152B6867

Pool Types

StableSwap pools (3pool, 4pool, etc.)
CryptoSwap pools (tricrypto, etc.)
MetaStable pools
Lending pools
Factory pools

Core Functions

Swap Functions

exchange (basic swap)
exchange_underlying (swap underlying assets)
get_dy (calculate output without executing)
get_dx (calculate input without executing)
exchange_extra (swap with additional features)

Pool Management

add_liquidity
remove_liquidity
remove_liquidity_one_coin
calc_token_amount (estimate LP token amount)
calc_withdraw_one_coin (estimate withdrawal amount)

Pool-Specific Functions

Pool-specific swap functions for different curve types
Virtual price calculations
Fee distribution functions
Pool parameter modifications

Implementation Steps

Create Curve struct implementing the Exchange interface
Implement adapter for different pool types
Handle curve's unique pricing mechanism (constant function AMM optimized for similar assets)
Implement multi-hop swaps between different pool types
Add support for underlying asset swaps
Implement virtual price calculations
Add support for factory-deployed pools
Create pool discovery and indexing functions

Pricing Mechanisms

Curve-Specific Pricing

Use Curve's mathematical formula for stablecoin swaps
Account for amplification coefficient (A)
Consider fee structure (dynamic based on trade size)
Handle different pool types with varying parameters
Calculate virtual price for accurate pricing

Multi-Asset Pools

Support for pools with 2, 3, 4+ assets
Handle asymmetric deposits/withdrawals
Calculate effective rates between different asset pairs

Testing Plan

Unit tests for stablecoin swap functions
Testing with different amplification coefficients
Virtual price calculation verification
Multi-asset pool testing
Factory pool integration tests
Edge case testing (extreme amounts, pool imbalance)
Price accuracy verification across different pool types
Gas optimization testing

Performance Considerations

Optimize for low slippage stablecoin swaps
Cache pool parameters to reduce external calls
Implement efficient multi-hop routing
Consider pool liquidity depth for trade execution
Batch operations where possible

Security Considerations

Validate curve pool addresses and parameters
Implement proper slippage protection despite low slippage
Handle emergency pause functions
Verify gauge contracts for liquidity mining
Sanitize data from external curve contracts

Integration with MEV Bot

Identify curve-specific arbitrage opportunities
Monitor stablecoin pools for profitable swaps
Track meta-stable pools for cross-chain opportunities
Include lending pools in yield farming strategies
Coordinate with other exchanges for maximum profit

3.3 KiB Raw Blame History