Forks will be deprecated on March 31, 2025. Please migrate to Tenderly Virtual TestNets or contact our support for assistance with automatic migration.
Simulations
Overview

Transaction Simulations

Transaction Simulations let you predict a transaction’s exact outcome before it is executed on the network. Tenderly enables you to run simulations on any of the 90 supported networks in one place.

Tenderly simulates transactions in a virtual environment that is a replica of the real blockchain. This ensures you’re always getting the most accurate simulation results: 100% accurate gas usage breakdown, assets exchanged, balance changes, storage updates, and entire decoded transaction trace.


Simulate via RPC

Opt to simulate via RPC when you need combined capabilities of blockchain access and simulations.

Simulate via API

Incorporate simulations seamlessly into your dapp or wallet using standard REST endpoints.

Tenderly SDK

The Tenderly SDK provides useful utilities for quickly adding simulations into your dapp or wallet.


Simulate on 90 networksSee all
Ethereum MainnetArbitrum OneAvalanche C-ChainLineaBase MainnetOptimistic EthereumPolygonBoba EthereumMode

Features

Learn how to simulate single and bundled transactions via API or RPC.


Single Transaction Simulations

Integrate simulations into your dapp to give users the ability to preview the results of their transactions without risking real assets and or spending money on gas.

Bundled Transaction Simulations

Simulate bundled transactions in one go and test the results of all interdependent transactions. Bundled simulations are ideal for governance proposals or strategy testing.

Use cases

  • Asset and balance changes: Get exact dollar values for all balance and asset changes that will happen.
  • Gas estimation: Accurately predict the gas costs before sending the transaction.
  • State overrides: Modify blockchain conditions like timestamps and contract data to test different scenarios.
  • Preview transaction outcomes: Identify and fix issues that could cause transactions to fail.
  • Access lists: Create lists of addresses and storage slots the transaction will access.
  • Human-readable errors: Get complex errors decoded into explanations that you can easily understand.

Resources


Quickstart

Learn the quickest way to integrate simulations into your dapp or wallet.

Authentication

Learn how to configure and authenticate access to the API and RPC.

Guides

Browse our growing library of transaction simulation integration guides.

API Reference

Get familiar with all the API simulation endpoints, requests, and parameters.

Pricing details

Explore pricing plans and rate limits for API and RPC simulations.

FAQ ↗

Get answers to the most commonly asked questions about simulations.

Quickstart