Crate revm_trace 

REVM Transaction Simulator and Analyzer

A high-performance, multi-threaded Rust library for EVM transaction simulation and analysis, built on REVM.

Usage Patterns

• Quick Start: Use create_evm or create_evm_with_tracer for fast EVM instantiation at the latest block.
• Custom Block Height: Use EvmBuilder for full control, including custom block height and inspector.
• Change Block Context: After creation, use set_db_block to update block context (this also resets the database cache for consistency).
• Multi-Threaded Simulation: Enable the foundry-fork feature for high-performance, thread-safe simulation with Foundry-fork-db backend.

Key Features

• Unified & Flexible EVM Construction: Builder pattern for AlloyDB and Foundry-fork-db backends, with support for custom block height, inspector, and connection (HTTP/ws).
• Customizable Inspector System: Use built-in TxInspector or your own inspector for tracing, slot access, and security analysis.
• Comprehensive Slot Access Tracking: Every transaction and call trace node can recursively collect all storage slot reads/writes (SlotAccess), with type filtering (read/write/all), enabling full mutation history and attack forensics.
• Batch & Multi-Threaded Simulation: High-performance, concurrent simulation with shared cache (Foundry-fork-db backend).
• Asset & Event Analysis: Simulate and analyze multiple transactions, asset transfers (ETH/ERC20/NFT), and event logs in one batch.
• Safe & Isolated Simulation: All simulations are isolated—no real blockchain state is modified.
• EVM-Compatible Chain Support: Works with any EVM-compatible blockchain, not just Ethereum mainnet.
• Rich Utility Functions: Includes tools for batch querying token balances, simulating Multicall deployment and batch execution, and more.

TxInspector Highlights

• Comprehensive Asset & Slot Access Tracking: Tracks all ETH/ERC20/NFT transfers and every storage slot read/write (SlotAccess) globally and per call trace, with type filtering and full context.
• Advanced Call Tree & Security Analysis: Builds hierarchical call traces, pinpoints error locations, and enables step-by-step reconstruction of storage mutation history for attack forensics and Safe wallet auditing.
• Event Log Collection: Captures and parses all emitted events during simulation.
• Error Investigation Tools: Locates exact failure points in complex call chains, decodes revert reasons, and provides contract-specific error context.
• Performance: Optimized for both single transaction and batch processing scenarios.

Module Structure

• evm: Core EVM implementation with tracing capabilities
• inspectors: EVM execution inspectors for different analysis needs (see TxInspector and TxInspector.md for full call trace and slot access design)
• types: Core data structures and type definitions
• traits: Trait definitions for extensibility
• errors: Error types and handling
• utils: Helper functions and utilities

Installation

[dependencies]
revm-trace = "4.2.0"

# TLS Backend Selection (choose one):
# Default: native-tls (OpenSSL) for maximum compatibility
# Alternative: Pure Rust TLS for system-dependency-free builds
# revm-trace = { version = "4.2.0", default-features = false, features = ["rustls-tls"] }

Re-exports

pub use evm::TraceEvm;

pub use evm::builder::create_evm;

pub use evm::builder::create_evm_with_tracer;

pub use evm::builder::EvmBuilder;

pub use inspectors::tx_inspector::TxInspector;

pub use types::SimulationBatch;

pub use types::SimulationTx;

pub use alloy;

pub use revm;

pub use foundry_fork_db;

pub use traits::*;

pub use evm::builder::fork_db::*;

Modules

errors

Error types for EVM tracing and simulation

evm

Core EVM wrapper and execution engine

inspectors

Inspector implementations for transaction tracing

traits

types

utils

Utility modules for EVM operations and blockchain interactions

Structs

BlockEnv

The block environment

MyWrapDatabaseAsync

Wraps a DatabaseAsync or DatabaseAsyncRef to provide a Database implementation.