Simulation UI

Learn more about using the Tenderly Simulation UI and how to build a simple transaction simulation.

The Simulation UI gives you an IDE-like experience when simulating transactions. You can either build a transaction from scratch or load an existing transaction into Transaction Simulator, tweak the inputs, and override state variables or the smart contract code.
Replaying an existing transaction using a simulation allows you to:
Validate bugfixes by running simulations on modified smart contract source code.
Validate adjustments to transaction parameters to find optimal inputs.
Troubleshoot an existing transaction, either a reverted one or a successful transaction with undesired effects. 
Using the Simulation UI
You can use the Simulation UI to: 
​Simulate a simple transaction​
​Set custom overrides of smart contract variables to impose custom conditions on the simulation.
Progress to using Simulation API to do simulations programmatically.
Explore using Forks to simulate several transactions.
Building a simulation
When building a transaction simulation, you can:
Run a simulation off of an existing transaction or build one from scratch.
Run a simulation on changed smart contract source code.
Specify the standard transaction fields: sender, value, as well as the smart contract function you're calling and its arguments.
Override smart contract state variables.
Override a block header by specifying custom blockNumber and timestamp values that the smart contract code receives.
Specify an arbitrary sender (from).
Specify an arbitrary gas and gasPrice for this particular simulation.
Use either the latest block number or specify a historical block number.

Simulations - Previous

Intro to Simulations

Using Simulation UI

Last modified 7mo ago