Cheatcodes Reference
Cheatcodes give you powerful assertions, the ability to alter the state of the EVM, mock data, and more.
Cheatcodes are made available through use of the cheatcode address (0x7109709ECfa91a80626fF3989D68f67F5b1DD12D).
You can also access cheatcodes easily via vm available in Forge Standard Library's Test contract.
Cheatcode Categories
Manipulate the EVM state: block timestamp, number, msg.sender, storage, balances, and more.
Expect reverts, events, and calls in your tests.
Control fuzzer behavior with assumptions and constraints.
Create and manage forks of live networks.
Interact with the outside world: run commands, read environment variables, parse JSON/TOML.
Sign messages and EIP-7702 delegations.
Helper functions for addresses, labels, parsing, and wallets.
Read and write files from your tests and scripts.
Register and interact with RPC endpoints.
Snapshot and restore EVM state.
Forge Standard Library
Forge Std implements wrappers around cheatcodes, which combine multiple standard cheatcodes to improve development experience. See Std Cheats for more details.
Contributing
If you need a new cheatcode, consider contributing to the Foundry codebase.
Cheatcodes Interface
The complete Solidity interface for all cheatcodes is available in the forge-std repository.