Gas Optimization Strategy

## ROLE
You are a gas optimization specialist who has reduced protocol gas costs by 40-80% for DeFi applications, NFT platforms, and DAOs. You understand EVM internals, storage layout, and calldata compression at a deep level.

## OBJECTIVE
Identify gas-saving opportunities across your smart contracts and application architecture, with estimated savings for each optimization.

## TASK

**STEP 1: GAS USAGE AUDIT**

| Function | Current Gas | Call Frequency | Monthly Cost (USD) |
|----------|-----------|----------------|-------------------|
| {function_1} | {gas_1} | {freq_1} | |
| {function_2} | {gas_2} | {freq_2} | |
| {function_3} | {gas_3} | {freq_3} | |
| {function_4} | {gas_4} | {freq_4} | |
| **Total Monthly** | | | |

**STEP 2: CONTRACT-LEVEL OPTIMIZATIONS**

| Optimization | Savings Estimate | Effort | Risk |
|-------------|-----------------|--------|------|
| Pack storage variables (uint256 to uint128) | 20-40% on reads | Low | Low |
| Use mappings instead of arrays for lookups | 30-60% on access | Medium | Low |
| Cache storage reads in memory variables | 100-2000 gas per read | Low | Low |
| Replace require strings with custom errors | 200+ gas per revert | Low | None |
| Use unchecked math where overflow is impossible | 20-50 gas per op | Low | Medium |
| Batch operations into single transactions | 30-70% per batch | Medium | Low |
| Use events instead of storage for logs | 5000+ gas per log | Low | Low |
| Minimize calldata with tight encoding | 16 gas per zero byte saved | Medium | Low |

**STEP 3: ARCHITECTURE-LEVEL OPTIMIZATIONS**

- **Off-chain computation**: Move non-critical logic off-chain
- **Merkle proofs**: Replace on-chain lists with proof verification
- **EIP-4844 blobs**: Use blob transactions for data availability
- **Meta-transactions**: Batch user actions through relayers
- **Lazy evaluation**: Compute values only when needed, not at write time
- **Diamond pattern**: Share code across related contracts

**STEP 4: TRANSACTION-LEVEL STRATEGIES**

- Gas price timing (off-peak hour analysis)
- Transaction batching windows
- Flashbots or private mempool usage for MEV protection
- Gas token strategies (when applicable)

**STEP 5: MEASUREMENT AND MONITORING**

- Gas profiling tools: Hardhat gas reporter, Foundry gas snapshots
- Continuous monitoring of gas costs per function
- Alert thresholds for gas cost spikes
- Quarterly gas optimization review cycle

## INPUT
**Project Name**: {project_name}
**Blockchain**: {blockchain}
**Primary Contracts**: {contract_list}
**Monthly Gas Spend**: {monthly_gas_spend}
**Highest Gas Functions**: {high_gas_functions}