tevm-events

Trace EVM opcode-level events to debug contract execution and gas usage.

Updated Nov 5, 2025

Search Tags:#debugging #blockchain #solidity #ethereum #evm #tevm #gas-profiling

Ready to run

npx skills add https://github.com/cyotee/crane --skill tevm-events

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: tevm-events
Source: https://github.com/cyotee/crane/tree/main/.claude/skills/tevm-events
Command: npx skills add https://github.com/cyotee/crane --skill tevm-events

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Monitor and debug EVM execution at opcode level to identify bugs, optimize gas usage, and validate contract behavior.

Core Features & Use Cases

EVM event tracing across steps, contract deployments, and message boundaries.
Real-time observations of opcode, gas, memory, stack, and call depth during execution.
Use Case: profiling gas costs or diagnosing reverts by stepping through instructions.

Quick Start

Observe and trace a contract deployment with onStep and onAfterMessage handlers to inspect opcode behavior.

Frequently Asked Questions about tevm-events

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I trace EVM execution step-by-step to debug a smart contract?▼

Trace EVM execution step-by-step by subscribing to opcode-level events like onStep to inspect gas, memory, stack, and call depth during contract execution for debugging workflows.

Can I profile gas usage by inspecting opcodes during Solidity contract execution?▼

Profile gas usage by subscribing to onStep events to observe real-time gas consumption and opcode behavior during EVM execution, enabling precise gas cost profiling and optimization.

What EVM events are needed to monitor contract deployments and message boundaries?▼

Monitoring contract deployments and message boundaries requires a client capable of subscribing to onStep, onNewContract, onBeforeMessage, and onAfterMessage events to trace execution accurately.

How does opcode-level tracing help diagnose Ethereum smart contract reverts?▼

Opcode-level tracing diagnoses reverts by stepping through individual EVM instructions, allowing you to inspect memory and stack states at the exact point where execution fails.

Do I need a specific client to use opcode-level event tracing for Ethereum?▼

Opcode-level event tracing requires a client capable of subscribing to onStep, onNewContract, onBeforeMessage, and onAfterMessage events to monitor EVM execution in real-time.

What is the best way to debug Ethereum contract behavior using EVM events?▼

Debug Ethereum contract behavior by tracing EVM execution with onStep and onAfterMessage handlers, validating contract behavior through real-time opcode, gas, and call depth observations.