evm-analysis

# EVM/Bytecode Analysis Skill Expert-level EVM bytecode analysis and decompilation for smart contract security audits, gas optimization, and reverse engineering. ## Capabilities - **Bytecode Analysis**: Analyze EVM bytecode and opcodes - **Gas Cost Calculation**: Calculate gas costs per operation - **Storage Layout Identification**: Identify storage slot layouts and packing - **Decompilation**: Decompile bytecode to pseudo-Solidity - **Proxy Analysis**: Analyze proxy implementation slots (EIP-1967) - **Pattern Detection**: Detect bytecode patterns (CREATE2, selfdestruct) - **Bytecode Verification**: Verify contract bytecode against source ## MCP Server Integration This skill can leverage the following MCP servers: | Server | Purpose | Install | |--------|---------|---------| | **EVM MCP Tools** | Smart contract auditing, security analysis | [0xGval/evm-mcp-tools](https://github.com/0xGval/evm-mcp-tools) | | **Solidity Contract Analyzer** | Contract code analysis with metadata | [Skywork](https://skywork.ai/skypage/en/smart-contract-analysis-solidity) | ## Opcode Reference Common EVM opcodes and gas costs: | Category | Opcodes | Base Gas | |----------|---------|----------| | Arithmetic | ADD, SUB, MUL, DIV | 3-5 | | Comparison | LT, GT, EQ, ISZERO | 3 | | Bitwise | AND, OR, XOR, NOT, SHL, SHR | 3 | | Memory | MLOAD, MSTORE | 3 + memory expansion | | Storage | SLOAD | 100 (warm) / 2100 (cold) | | Storage | SSTORE | 100-20000 (varies) | | Control | JUMP, JUMPI | 8-10 | ...