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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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Balancer Integration Plan

Overview

This document outlines the implementation plan for Balancer exchange support in the MEV bot. Balancer is an automated portfolio manager, liquidity provider, and price sensor that supports pools with up to 8 tokens at any weighted ratio.

Contract Architecture

Core Contracts

Vault: 0xBA12222222228d8Ba445958a75a0704d566BF2C8
Weighted Pool Factory: 0x8E9AA87E45e92bad84D5F8DD1bfc9578C171874D
Stable Pool Factory: 0xc66Ba2b6595d3613CCe04132849632C544f5C791
Liquidity Bootstrapping Pool Factory: 0x7512224C69C447D30793f18fCD4AC25f830c6308
MetaStable Pool Factory: 0x67d2691E47E8834e0D0955Fd0f1FA0d14C59b3c1

Pool Types

Weighted Pools (constant weight AMM)
Stable Pools (for similarly-priced assets)
Liquidity Bootstrapping Pools (LBP)
MetaStable Pools
Composable Stable Pools

Core Functions

Swap Functions

batchSwap (single function for all swap types)
queryBatchSwap (simulate swaps without execution)
Pool-specific swap functions

Liquidity Functions

joinPool (add liquidity)
exitPool (remove liquidity)
queryJoin (simulate adding liquidity)
queryExit (simulate removing liquidity)

Vault Functions

manageUserBalance (internal token transfers)
managePoolBalance (pool-specific operations)
getPoolTokens (get pool composition)
getPoolId (get pool identifier)

Implementation Steps

Create Balancer struct implementing the Exchange interface
Implement Vault interaction layer
Handle different pool types with appropriate pricing models
Implement batchSwap functionality for multi-hop trades
Add pool discovery and indexing functions
Create weighted pool management functions
Implement stable pool functions for similar assets
Add support for Liquidity Bootstrapping Pools

Pricing Mechanisms

Weighted Pool Pricing

Implement constant mean market maker formula
Handle pool weights and token balances
Calculate spot prices based on weights
Account for swap fees which are configurable per pool

Stable Pool Pricing

Use StableMath library for stablecoin swaps
Handle amplification parameters
Consider fee structure for stable pools
Implement efficient computation for multi-asset swaps

Balancer-Specific Considerations

Account for different fee structures per pool
Handle pool specialization (GENERAL, MINIMAL_SWAP_INFO, TWO_TOKEN)
Consider oracle-enabled pools for price tracking
Handle pool weights that can change over time (Gradual Weight Updates)

Testing Plan

Unit tests for weighted pool swaps
Stable pool functionality testing
Multi-hop trade execution testing
Pool composition verification
Fee calculation accuracy testing
Edge case testing (pool imbalance, extreme weights)
Integration tests with mainnet fork
Gas optimization verification

Performance Considerations

Efficient batch operations using Vault
Optimize for pools with different token counts
Cache pool composition and weights
Implement efficient routing for multi-token pools
Consider pool liquidity depth for trade execution

Security Considerations

Validate pool parameters and token composition
Implement proper slippage protection
Verify pool permissions and restrictions
Handle pool-level rate limits
Check for pool-specific security measures

Integration with MEV Bot

Identify Balancer-specific arbitrage opportunities
Monitor weighted pools for profitable swaps
Track LBP opportunities during new token launches
Include stable pools in stablecoin strategies
Coordinate with other exchanges for cross-exchange arbitrage
Consider Balancer's voting escrow (veBAL) incentives

3.6 KiB Raw Blame History