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Forks
Tenderly Fork Customization API

Tenderly Fork Customization API

Migrate to Virtual TestNets

Virtual TestNets are publicly available!
For new projects, we recommend starting with TestNets.
For automatic migration of Forks to TestNets, .

The guides below show how to customize transaction simulations and (forked) networks in various aspects.

How to revert transactions on a Fork (a.k.a. “Timemachine”):

How to increase time on your Fork before simulating a transaction:

How to increase the block number on your Fork before simulating a transaction:

How to specify Chain ID, different from the network you forked:

How to specify parameters for your simulations:

How to simulate sending a transaction from an arbitrary address:

How to manage account balances in Tenderly Forks:

How to change storage values on a Fork: